JP2010017341A - Disposable diaper - Google Patents

Abstract

Disclosed is a disposable diaper that can be attached / detached without taking off all of the clothes, can be raised and lowered even while worn, and has excellent fit.
A disposable diaper 1 according to the present invention includes an absorbent member 22, a top sheet 18, a back sheet 20, and at least one fastening member extending from left and right side edges 6 a and 6 b of a back body 6. 13, a to-be-attached region attached to the front body 2 and fastening the right and left fastening members 13, and an abdominal circumference stretchable material 42 disposed along the abdominal circumference direction of the back body 6. Incisions in which a part of the back body 6 is cut from the crotch 4 side toward the back body 6 side at the crotch 4 side end of each side flap 7 constituted by the left and right side edge portions of the body 6 29 is formed.
[Selection] Figure 1

Description

  The present invention relates to a disposable diaper. More specifically, the present invention relates to a disposable diaper that can be attached / detached without taking off all the clothes, can be raised and lowered even while worn, and has excellent fit.

  In recent years, disposable diapers such as pants-type diapers and tape-type diapers have been used as diapers for infants and the elderly and disabled. For example, a pants-type diaper is composed of a front body, a crotch part, and a back body, and corresponding side edges of the front body and the back body are joined to each other so that one waist opening and a pair of leg openings The part is formed. And the structure which arrange | positions elastic materials, such as thread rubber, along a waist periphery opening part and a leg periphery opening part is common. Since such a pants-type disposable diaper is excellent in stretchability around the waist, when excreting in the toilet, the diaper can be lowered to the vicinity of the knee in the same manner as normal pants.

  When such a pants-type disposable diaper is worn, it is necessary to take off the trousers and the like again and wear it very much.

  On the other hand, tape-type disposable diapers can be attached and detached without taking off clothes like pants-type disposable diapers, but they have poor elasticity around the waist, and when urinating in the toilet, the diaper is lowered. Can not cope with. For this reason, it is very inconvenient for the wearer who can perform the excretion in the toilet himself to remove the diaper once during the excretion in the toilet.

  Therefore, conventionally, disposable diapers have been proposed that can be attached and detached without removing all the clothes and that can be raised and lowered while wearing (see, for example, Patent Documents 1 to 4).

JP 2006-34402 A JP 2005-192670 A Japanese Patent Laid-Open No. 2005-230313 JP-A-2005-270360

  However, in the conventional disposable diapers described in Patent Documents 1 to 4, the back body where the side flaps are formed integrally extends from the wearer's back side to the abdomen side via the flank. Because of the covering structure, there is a problem that the side flap portion does not properly adhere to the wearer's body and the wearing feeling (fitness) is poor. Moreover, when the adhesiveness with respect to a wearer is raised too much, the clamp | tightening of the leg periphery part will become strong too much and the free operation | movement of a leg part will become difficult.

  The present invention has been made to solve the above-described problems of the prior art, and is detachable without taking off all the clothes, and can raise and lower the diaper while wearing it. In addition, the present invention provides a disposable diaper excellent in fit.

  As a result of intensive studies to solve the above-described problems of the prior art, the present inventor has rearwardly moved from the crotch side to the back body side at the crotch side end of the side flap constituted by the back body. The inventors have conceived that the above-mentioned problems can be solved by forming a cut portion in which a part of the body is cut, and the present invention has been completed. Specifically, the following disposable diapers are provided by the present invention.

[1] A top sheet composed of a front body, a crotch part, and a back body, arranged to cover the upper surface of the absorber, and at least partly made of a liquid-permeable material; A back sheet made of a liquid-impermeable material, disposed so as to cover the lower surface side of the absorbent body, and the left and right sides of the rear body, respectively, in the vicinity of the left and right side edges of the rear body A fastening member for fixing the back body and the front body, which is extended at least one by one from the edge, and a fastening region attached to the front body and fastening the fastening members on the left and right A plurality of belly stretchable members disposed along the abdomen direction of the back body, and left and right side edge portions of the back body serve as side flaps of the diaper, and the left and right sides of the back body The fastening member through the edge portion of the wearer's flank A disposable diaper that is used as a pants-type diaper by being fastened to the attachment area of the front body, wherein the crotch side ends of the side flaps are formed by left and right side edge portions of the back body Furthermore, the disposable diaper in which the incision part by which the said back body part was cut | disconnected toward the said back body side from the said crotch lower part side is formed.

[2] The cut portion is formed in a portion corresponding to the left and right iliac ridges of the wearer when wearing the diaper, or a portion corresponding to the front side of the iliac ridge. Disposable diapers.

[3] The cut portion is formed over a part of a region where the abdominal circumference stretchable material is disposed, and a part of the abdominal circumference stretchable material is cut by the cut portion. Or the disposable diaper as described in [2].

[4] The disposable diaper according to any one of [1] to [3], wherein the fastening member is disposed on a part of the rear end side near the left and right side edges of the back body.

[5] The disposable diaper according to any one of [1] to [3], wherein the fastening member is extended from a part of the rear end side of the left and right side edges of the back body.

[6] One attachment area is provided near each of the left and right side edges of the front body, and the corresponding attachment members on the left and right sides are respectively attached to the attachment areas. The disposable diaper according to any one of the above [1] to [5], which is configured to be possible.

[7] The disposable diaper according to any one of [1] to [6], wherein the fastening member has a knob portion including a non-fastening portion at a distal end portion.

  According to the present invention, it is possible to provide a disposable diaper that is detachable without taking off all the clothes, can be raised and lowered even when worn, and has excellent fit. That is, the disposable diaper of the present invention can be satisfactorily encapsulated from the wearer's back side to the abdominal side via the flank by the side flaps, and further, the cut portion formed in the side flaps. When wearing a diaper, it expands and contracts according to the wearer's body shape and posture, so it has excellent fit. For this reason, the movable range around a wearer's leg can be widened by a notch part.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be specifically described. However, the present invention is not limited to the following embodiment, and is within the scope of the present invention without departing from the spirit of the present invention. It should be understood that design changes, improvements, etc. can be made as appropriate based on knowledge.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part that covers the inseam of the wearer is the part that covers the back side of the wearer (the back of the body) and the part that covers the back side. It shall mean the part which covers the circumference of the belly extended in the circumference direction.

[1] Configuration of the disposable diaper of the present invention:
Drawing 1 is a top view showing one embodiment of the disposable diaper of the present invention, and is a figure showing the state seen from the top sheet side. 2A is a front view showing a wearing state of the disposable diaper shown in FIG. 1, FIG. 2B is a rear view showing a wearing state of the disposable diaper shown in FIG. 1, and FIG. 2C is a disposable diaper shown in FIG. It is a side view which shows the wearing condition. FIG. 3 is a schematic cross-sectional view showing one embodiment of the disposable diaper of the present invention, and is a schematic cross-sectional view showing a cross section of the disposable diaper shown in FIG. 1 cut along the line AA ′.

  As shown in FIG. 1, FIG. 2A, FIG. 2B, FIG. 2C, and FIG. 3, the disposable diaper 1 of the present invention is composed of the front body 2, the crotch 4, and the back body 6. A top sheet 18 that is disposed so as to cover the upper surface of the absorber 22 and at least partially made of a liquid permeable material, and a liquid impervious that is disposed so as to cover the lower surface side of the absorber 22. Back sheet 20 made of material, and rear body arranged in the vicinity of left and right side edges 6a and 6b of back body 6 or extended at least one each from left and right side edges 6a and 6b of back body 6 6, a fastening member 13 for fixing the front body 2, a fastening region 15 attached to the front body 2 to fasten the right and left fastening members 13, and an abdominal circumference direction X of the rear body 6 Disposable diaper 1 provided with a plurality of belly stretchable materials 42 disposed A.

  In the disposable diaper 1 of the present invention, the left and right side edge portions of the back body 6 become the side flaps 7 of the diaper, and the left and right side edges 6a and 6b portions of the back body 6 (that is, the left and right side flaps 7) are worn. The fastening member 13 is fastened to the secured region 15 of the front body 2 through the person's flank and used as a pants-type diaper.

  In the disposable diaper 1 of the present invention, the crotch 4 side end of each side flap 7 formed by the left and right side edge portions of the back body 6 in the unfolded state of the disposable diaper 1 A cut portion 29 in which a part of the back body 6 is cut from the back toward the back body 6 is formed.

  The disposable diaper 1 of the present invention can be satisfactorily encapsulated from the back side of the wearer to the abdominal side via the flank by the side flap 7, and the cut formed in the side flap 7. Since the part 29 expands / contracts depending on the wearer's body shape and posture when the diaper is worn, the fit is excellent. For this reason, the movable range around the wearer's leg can be widened by the cut portion 29.

  Moreover, by forming such a cut portion 29, a fastening portion (for example, a mechanical fastening system) used for the fastening member 13 can be designed to be large, and the fastening force of the fastening portion can be increased, and the diaper can be designed. Sliding can be more effectively prevented. Furthermore, by forming the cut portion, the opening around the leg can be widened, and the diaper in a pants-shaped state can be easily worn.

[1-1] Configuration of the back body of the disposable diaper of the present invention:
The disposable diaper of the present invention is characterized by the structure of the back body. As described above, in the disposable diaper of the present invention, the left and right side edge portions of the back body are side flaps of the diaper, and the side flap portions are arranged on the side flaps via the wearer's flank (or The fastening member extended) is worn by being fastened to the secured region of the front body.

  The back body 6 in the disposable diaper 1 shown in FIG. 1 includes a part covering the back side of the wearer (that is, the back of the body (for example, the buttocks)) and a part around the abdomen extending from the part covering the back side in the abdominal direction. It is formed by the strip-shaped exterior member 16 which consists of the part which covers. The exterior member 16 is a sheet-like member having a mounting function for encapsulating the wearer's body.

  In the disposable diaper 1 of the present invention, the crotch 4 side ends of the side flaps 7 formed by the left and right side edge portions of the back body 6 are rearward from the crotch 4 side toward the back body 6 side. A cut portion 29 is formed by cutting a part of the body 6, thereby improving the fit around the legs when wearing the diaper and appropriately encapsulating the wearer's buttocks It becomes possible.

  In the disposable diaper 1 shown in FIG. 1, a portion covering the back side of the wearer and a portion covering the abdomen extending from the portion covering the back side in the abdominal direction (that is, the back body 6) are exterior members. 16, the front body 2 and the crotch part 4 are formed by an absorber 22 other than the exterior member 16. In addition, in the disposable diaper of this invention, the exterior member may be comprised with the sheet-like member which forms a crotch part and a front body with a back body.

  In the disposable diaper of the present invention, the absorption / holding function for absorbing and holding the excrement of the wearer is exclusively performed by the absorbent body, so a liquid-impermeable material is used as a material constituting the exterior member. There is no need. Examples of the material constituting the exterior member include woven fabric and nonwoven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester. Specific examples include spunbond, SMS, air-through nonwoven fabric, and the like. In particular, spunbond can be suitably used because of its high strength. Moreover, since an air through nonwoven fabric is excellent in the touch feeling, it can also be suitably used as a material for the surface (outside) of the exterior member.

  And in order to fix an exterior member in the state which pinched | interposed the elastic material around the abdomen, the elastic material around the waist, etc., it is often configured by bonding two or more nonwoven fabrics. For example, the disposable diaper 1 shown in FIG. 1, FIG. 2A, FIG. 2B, FIG. 2C, and FIG. 3 comprises the exterior member 16 made of two nonwoven fabrics, and an abdominal circumference stretchable material 42 between the two nonwoven fabrics. And it is the example which pinched and fixed the elastic material 44 around the waist. In addition, like the disposable diaper 1a shown in FIG. 4, when the absorber 22 is not arrange | positioned in the area | region where the belly circumference elastic material 42 is arrange | positioned, the edge part of the absorber 22 is made into another nonwoven fabric (suppression sheet | seat). The absorber 22 can be arrange | positioned to the exterior member 16 by restraining and fixing by 31).

[1-1a] Side flap:
The side flap is formed as a part of the back body of the diaper. The side flap is encased from the wearer's back to the abdomen via the flank and placed (or extended) on the side flap. This is a belt-like part for fastening the wearing member to the to-be-attached region of the front body and using the diaper as a pants type.

  In the present specification, the length in the diaper longitudinal direction of the side flap constituted by the back body is referred to as “side flap width”, and the length in the diaper width direction is referred to as “side flap length”.

  In the disposable diaper of the present invention, the portion covering the wearer's back side and the side flap may be formed from an integrally formed sheet-like member, or a portion covering the wearer's back side The side flap may be formed by a separate sheet-like member, and another sheet-like member constituting the side flap may be joined to both side edges of the sheet-like member constituting the portion covering the back side. .

[1-1b] Cut portion:
The cut portion is a cut in which a part of the back body is cut from the crotch side toward the back body side at the crotch side end of each side flap. In the disposable diaper 1 shown in FIG. 1, the waist flap 4 side end portion of the side flap 7 (ie, the lower end portion of the side flap 7 when worn) from the side flap 7 waist end portion 27 side end portion ( That is, an example is shown in which a cut portion 29 formed by a cut in which a part of the back body 6 is cut out is formed toward the upper end portion of the side flap 7 when worn.

  By comprising in this way, the cut-in part 29 of a side flap can be expanded / contracted freely according to a wearer's body shape, and favorable fitting property can be implement | achieved. Furthermore, since the cut portion 29 expands and contracts in accordance with the movement of the wearer's leg, the movable range around the leg can be widened.

  In addition, in FIG. 1, although the incision part 29 notched by the isosceles triangle shape which appoints the point of the vicinity of the center of a side flap width | variety is shown in the crotch 4 side edge part, the disposable diaper of this invention The notch part may be formed by a notch that is simply cut from the crotch side end of the back body toward the center of the side flap width.

  Although there is no restriction | limiting in particular about the length in the side flap width direction of a notch part, It is preferable that it is the length of the range of 10 to 50% of the side flap width. If the length of the cut portion in the side flap width direction is too long, the substantial width of the side flap in the region where the cut portion is formed (that is, the side flap width other than the cut portion) is shortened, and stability when wearing a diaper. A feeling may fall and a diaper may become easy to shift | deviate. On the other hand, if the length of the cut portion in the side flap width direction is too short, the expansion / contraction width of the cut portion becomes narrow, and it may be difficult to obtain a sufficient effect of improving fit.

  Further, the position at which the cut portion in the side flap length direction is formed is not particularly limited as long as the cut portion can be expanded and contracted when the diaper is worn and the fit property can be improved. In a diaper, the incision part corresponds to the left and right iliac ridges of the wearer when wearing the diaper, or the part corresponding to the front side of the iliac ridge (ie, from the protrusions of the hip bones on both sides of the wearer) Is also preferably formed on the front side). By comprising in this way, the back side (for example, buttocks etc.) which has a comparatively large area which encloses a wearer's body can be favorably wrapped by the back body, and a favorable wearing feeling can be obtained. . In addition, the above-mentioned iliac crest is arrange | positioned a little on the front side rather than the center position of a wearer's body side edge. For this reason, it is preferable also about the cut | notch part to be arrange | positioned in the front side rather than the center position of a wearer's body side edge.

  In addition, the incision is formed over a part of the region where the abdominal circumference stretchable material is arranged, and it is also one of the preferred embodiments that a part of the abdominal circumference stretchable material is cut by this cutout. is there. By configuring in this way, as shown in FIG. 2C, the cut portion 29 can be shrunk to wrap around the leg, and the fit around the leg can be improved.

[1-2] Fastening member:
The fastening member used for the disposable diaper of this invention is a fastening member for fixing the back body and the front body of a diaper, and using the developed diaper as a pants type. The fastening member is disposed in the vicinity of the left and right side edges of the back body of the diaper, or extends at least one from the left and right side edges of the back body.

  In the disposable diaper 1 of the present invention shown in FIG. 1 and FIG. 2A, a fastening portion 21 is provided on the surface of a base material 25 extending from the left and right side edges 6 a and 6 b of the back body 6 as the fastening member 13. Is provided with a fastening tape 13a. By fastening the left and right fastening tapes 13a to the secured region 15 attached to the front body 2, a waist circumference opening 27 and a pair of leg circumference openings 12a, 12b are formed, The entire diaper can be pant-type.

  In addition, since the fastening member 13 can be attached and detached, the diaper can be attached and detached without removing all the clothes, and once worn, the elastic material 42 has elasticity in the abdominal circumference direction. Therefore, like a pants-type diaper, the diaper can be easily raised and lowered while being worn.

  Examples of the fastening portion 21 provided on the fastening member 13 include a hook material of a mechanical fastener and an adhesive layer made of an adhesive. In particular, a hook material of a mechanical fastener is preferably used. it can. The above-mentioned “mechanical fastener (also referred to as a surface fastener)” is a surface fastener that uses mechanical coupling, and for example, a large number of protrusions (such as a hook, mushroom, and hook) are formed on the surface. A combination of the projected member (hook member) and a recess member (loop member) having loop-like fibers arranged on the surface is often used. In this fastener, the hook material is superimposed on the surface of the loop material, and a large number of protrusions of the hook material are engaged with the surface of the loop material, so that both members can be peeled and firmly fixed. It can be done.

  There is no restriction | limiting in particular about the base material 25 for attaching the fastening part 21, The base material for fastening tapes used for the conventional tape type diaper, for example, a plastic film, a woven fabric, a nonwoven fabric, felt, etc. A base material made of a cloth material can be used.

  In addition, like the disposable diaper 1b shown in FIG. 5, when the fastening member 13 is each arrange | positioned in the vicinity of the left and right side edges 6a and 6b of the back body 6, the above-mentioned mechanical fastener is fastened. What is necessary is just to attach to the right-and-left side edge 6a, 6b vicinity of the back body 6 as the member 13. FIG.

  Moreover, as shown in FIG. 1, in the disposable diaper 1 of this invention, the knob | pick which consists of the non-fixing part which is not fixed to the to-be-attached area | region 15 (refer FIG. 2A) in the part at the front end side of the fixing member 13 is shown. It is preferable that the portion 23 is further included. By comprising in this way, the fastening member 13 can be attached or detached easily. The knob 23 can be formed, for example, by not providing the fastening part 21 at the tip side of the base material 25.

  As shown in FIG. 5, when the fastening member 13 is disposed in the vicinity of the left and right side edges 6 a and 6 b of the back body 6, the illustration is omitted. A knob portion extending from the left and right side edges may be provided separately.

  In addition, there is no restriction | limiting in particular about the fastening method at the time of fastening a fastening member to a to-be-attached area | region, For example, the fastening method by an adhesive other than the fastening method by the above-mentioned mechanical fastening system (surface fastener) is mentioned. A wearing method may be used. In FIG. 1, fastening tapes 13a having two continuous fastening parts are arranged on the left and right of the back body 6. The fastening parts of the fastening tape 13a are formed discontinuously. It may be a thing. Moreover, in the fastening tape 13a having two continuous fastening portions, a separation line may be provided at the approximate center. In addition, when using the fastening tape which has two continuous fastening parts, as shown in FIG. 1, it is preferable that it is what was S-shaped cut.

  Moreover, as shown in FIG. 6, as the fastening member 13 in the disposable diaper 1c of this invention, it was each extended from a part by the side edge 6a, 6b rear end side of the back body 6, respectively. Also good. In this way, the fastening member 13 (fastening tape 13b) extends from only a part of the side edges 6a, 6b of the back body 6, and is fastened to the crotch part side of the side edges 6a, 6b of the back body 6. By adopting a configuration in which the member 13 is not disposed, when the disposable diaper 1c is worn, the fit around the legs can be improved, and the wearer's buttocks can be appropriately wrapped by the back body 6. .

  As shown in FIG. 5, even when the fastening member 13 is disposed in the vicinity of the left and right side edges 6a and 6b of the back body 6, for example, the disposable diaper 1d shown in FIG. As described above, the fastening member 13 may be disposed on a part of the rear end side of the left and right side edges 6a and 6b of the back body 6, respectively. By comprising in this way, the effect similar to the disposable diaper 1c shown in FIG. 6 can be acquired.

[1-3] Attachment area:
A to-be-attached area | region is an area | region which fixes an above-described fixing member. The disposable diaper 1 shown in FIGS. 1, 2 </ b> A, 2 </ b> B, 2 </ b> C, and 3 has a fastening member 13 that extends from the left and right side edges 6 a and 6 b of the back body 6 on the side of the wearer. The attachment region 15 is attached to the outer surface of the front body 2 because it is for fixing on the front abdominal part side via.

  The area to be secured in the disposable diaper of the present invention is not particularly limited in size and shape as long as it is attached to the outer surface of the front body and can fasten the fastening part of the fastening member. As shown in FIG. 2A, a fastening region 15 for fastening the right and left fastening members 13 of the back body may be provided over the entire abdomen of the front body 2 of the diaper. For example, FIG. As shown in the disposable diaper 1e shown, each of the attachment areas 15 is provided in the vicinity of the left and right side edges of the front body 2 (attachment areas 15a and 15b), and is attached to each of the attachment areas 15a and 15b. It is preferable that the corresponding left and right fastening members 13 can be fastened.

  By comprising in this way, the position which fastens the right and left fastening member 13 can be fixed, respectively, and the freedom degree in the wearing state of a diaper can be made low. Thereby, irrespective of a wearer's body shape, a diaper can always be worn in the same state and the position accuracy of an absorber to a wearer can be improved. For example, when the disposable diaper of the present invention is provided with a skin contact sheet to be described later, the feces passage opening of the skin contact sheet is appropriately positioned at the position of the wearer's anus. Can be adapted to. Here, FIG. 8 is a front view showing a wearing state of the disposable diaper in another embodiment of the disposable diaper of the present invention.

  The material to be secured is not particularly limited as long as it can fasten the fastening part of the fastening member. For example, the fastening part of the fastening member is a hook of a mechanical fastener. In the case of a material, a front patch made of a loop material of a mechanical fastener can be used. Further, the hook material of the mechanical fastener can be engaged with a material having a fibrous surface such as woven fabric, non-woven fabric, felt, and pile in addition to the loop material of the mechanical fastener corresponding thereto. Instead of the loop material of the mechanical fastener, a to-be-attached region can be formed using a sheet material made of these materials.

  Moreover, when the fastening part of the fastening member is an adhesive layer made of an adhesive, the adhesive layer can be attached, a film on which the adhesive is peeled off, etc. Can be used.

[1-4] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable. Moreover, as a countermeasure against the loss of shape of the absorbent body, synthetic fibers such as heat-sealing fibers may be included.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  It is preferable that the absorber is interposed between at least a part between the top sheet and the back sheet. Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, a flap portion where no absorber is interposed is formed between the top sheet and the back sheet at the peripheral portion of the absorber. The absorber is interposed in at least a part between the top sheet and the back sheet. More specifically, the absorbent body may be interposed at least in the crotch region, and the absorbent body may extend to the front body and the back body.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  The shape of the absorber is not particularly limited, but may include shapes used in conventional disposable diapers and other absorbent articles, such as a rectangular shape, an hourglass shape, a gourd shape, and a T shape. it can. The disposable diaper 1 of the present invention shown in FIG. 1 is an example in which an hourglass-type absorber is used as the absorber 22.

  In addition, a sheet (second sheet) for diffusing a liquid such as urine or body fluid may be incidentally disposed on the upper surface side of the absorber (for example, between the absorber and the top sheet). . When this second sheet is attached, due to the wearer's posture, etc., even when the space on the back side of the top sheet is not sufficiently formed, the absorption rate of urine, body fluid, etc. is difficult to decrease, and the absorption rate decreases. It is possible to prevent leakage of urine and body fluids.

  Examples of the material constituting the second sheet include hydrophilic and liquid-permeable materials such as woven fabric, non-woven fabric, porous plastic, and fluff pulp. Examples of these constituent materials include polypropylene, polyethylene, polyester, rayon, pulp, and composite fibers thereof. As the pulp, crimped fibers such as curly cellulose fibers can be suitably used.

[1-5] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the upper surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the lower surface side (back surface side) needs to absorb the wearer's urine. Usually, at least near the surface of the absorber, it is made of a liquid-permeable material that can permeate the wearer's urine and body fluid. As long as at least a part is made of the liquid permeable material, the entire top sheet is not necessarily made of the liquid permeable material.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment. There is no restriction | limiting in particular also about the kind of nonwoven fabric, The conventionally well-known nonwoven fabric manufactured by various manufacturing methods, such as air through (card hot air), card | curd embossing, and a spun bond, can be used suitably.

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials.

[1-6] Backsheet:
A back seat | sheet is a sheet | seat arrange | positioned so that the lower surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) side of an absorber may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[1-7] Absorbent body:
In the disposable diaper of the present invention, the top sheet, the back sheet, and the absorbent body are configured as one member called an “absorbent main body” that is responsible for absorption and holding functions, and a disposable diaper is configured by joining an exterior member thereto. May be. This absorbent main body has a structure in which a top sheet is disposed on the upper surface side of the absorbent body and a back sheet is disposed on the lower surface side, and the absorbent body is interposed between the top sheet and the back sheet. For example, the disposable diaper 1 shown in FIG. 1 sandwiches the absorbent body 22 between the top sheet 18 and the back sheet 20 and seals the peripheral portion of the absorbent body 22, so that the top sheet 18 and the back sheet 20 are sealed. It is the example which comprised the absorptive main body 14 of the structure where the absorber 22 was interposed. In the present invention, the exterior member 16 is disposed on the lower surface on the back body 6 side of the absorber 22, and the back sheet 20 is disposed on the lower surface side of the absorber 22 and the exterior member 16.

  An absorptive main body is comprised by the size which covers at least the crotch part of a diaper. However, in order to ensure the effect of preventing leakage, it may be configured to cover not only the crotch part but also a part of the front body and the back body. The absorptive main body can be fixed to the exterior member using, for example, a hot melt adhesive or the like.

[1-8] Various elastic materials:
As shown in FIG. 1, the disposable diaper of the present invention further includes a plurality of abdominal circumference elastic members 42 arranged along the abdominal circumference direction X of the back body 6 of the diaper.

  An abdominal circumference elastic material is an elastic material arrange | positioned at least in the part (namely, part corresponding to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a gather (tammy gather) rich in elasticity around the abdomen of the wearer. In addition, as an abdominal circumference elastic material, it is not limited to Tammy gather arrange | positioned around a wearer's abdomen, You may arrange | position to a wearer's waist circumference. In such a case, the elastic material around the abdomen functions as both a Tammy gather and a waist gather. By comprising in this way, the fitting property of a diaper and the slip prevention effect can be made further excellent. Such an abdominal circumference elastic material is formed by, for example, arranging a long elastic material (hereinafter, also referred to as “long elastic material”) along the abdominal circumference direction of the back body.

  The disposable diaper of the present invention is an unfolded state diaper like the conventional tape-type diaper, but includes the above-mentioned belly stretchable material, so that the diaper is addressed to the wearer and the fastening member is secured. It can be used as a pants-type diaper by fastening it to the wearing area, and the disposable diaper of the present invention can be attached and detached without removing all the clothes as in the conventional tape-type diaper. Once the diaper is worn, the diaper can be easily raised and lowered while being worn (that is, the front body and the back body are fixed by the fastening member), similarly to the pants-type diaper. For this reason, for example, even a wearer who needs care for excretion or a wearer who can excrete in the toilet himself can be used well.

  There is no restriction | limiting in particular about the form of the elongate elastic material which comprises an abdominal circumference elastic material, Forms, such as a thread rubber and a flat rubber, can be employ | adopted. Conventionally, thread rubber has been used as an abdominal stretchable material, but since thread rubber is a twisted yarn in which a thin thread is twisted, adopting a method of cutting after placing an elastic material as described later, all In some cases, the yarn cannot be cut completely, and depending on the conditions, there is a possibility that the stretchable material may remain uncut. Therefore, it is preferable to use flat rubber for the disposable diaper of the present invention. Flat rubber is composed of a structure in which a single rubber is integrated, and thin threads are not twisted together like thread rubber. Therefore, it does not occur that all the yarns cannot be cut as in the case of rubber thread, and uncut portions are not generated. In particular, when the elastic material is cut in a state where the elastic material is arranged at a high elongation rate as described later, if the cut enters a part of the elastic material, the cut is extended by the elongation stress of the rubber, Since the elastic material is torn, there is an advantage that the elastic material can be cut easily and reliably.

  When flat rubber is used as the long stretchable material, the rubber width is preferably 0.2 to 1.3 mm, and the fineness is preferably 1400 to 5000 dtex.

  The elastic material around the abdomen in the disposable diaper of the present invention is fixed in an area where the long elastic material does not overlap at least the area where the absorber is disposed, and then cut in the area where the absorbent area overlaps. It is preferable that

  For example, as shown in FIG. 1, when the absorber 22 is extended to the area that forms the stomach circumference of the diaper in the back body 6, the arrangement area of the absorber 22 is Y in FIG. 1. In the range of (absorber arrangement region Y), the long stretchable material is in a region Z that does not overlap with the arrangement region of the absorber 22 in the back body 6, that is, in a region outside the side edges of the absorber 22. Will be placed.

  As described above, by cutting the elastic material around the abdomen in the region that overlaps with the region where the absorber is disposed, it is possible to prevent the problem that the absorber contracts due to the stretching force acting on the absorber. . Therefore, it is excellent in diaper fit and wearing feeling, and is easier to manufacture than conventional disposable diapers. That is, when manufacturing, there is no need to create a stretchable tape in which a stretchable material is joined to a sheet-like support, and it is not necessary to dispose this stretchable tape intermittently on a nonwoven fabric sheet. Can be produced with high productivity.

  In addition, when cutting an abdominal circumference elastic material in the area | region which overlaps with the arrangement | positioning area | region of an absorber, it is preferable to cut | disconnect only a part of each elastic material in an arrangement | positioning area | region of an elastic material. That is, it is preferable to cut only a part of one belly stretchable material. By doing so, a large number of cut pieces of the elastic material are not formed, and it becomes possible to prevent the appearance of the product from being defective due to the cutting of the elastic material.

  In the present specification, “cutting only a part” includes not only cutting only one part of the elastic material but also cutting a plurality of parts in the nearest region. For example, when an elastic material cutting roll described later is used, a plurality of portions of one elastic material may be cut by a plurality of adjacent cutting protrusions of the first roll. However, when the elastic material is cut at a plurality of locations in such an extremely limited region, a large number of cut pieces of the elastic material remain, and the appearance of the product is not deteriorated.

  In the disposable diaper of the present invention, the elastic material around the abdomen is made of a rubber having a tensile force at the time of 300% elongation in the two-way round trip of 40 gf or less when repeatedly stretched within the range of 100 to 500%. It is preferable that the long stretchable material to be formed is continuously disposed at an elongation rate of 300 to 500% in a region that does not overlap with the region where the absorber is disposed.

  When rubber is stretched repeatedly within a range of 100% to 500%, and a rubber having a tensile force of 300 gf or less in the second reciprocating path is 40 gf or less, even if the rubber is arranged at a high rate, The rubber still has sufficient allowance for elongation. Therefore, even if the wearer has a thick body shape, the body is not overtightened. Moreover, since such rubber | gum is flexible and rich in elasticity, there exists an advantage that it is easy to take off a diaper with respect to a wearer (or a wearer is easy to take off a diaper). Examples of rubber having such characteristics include “Silver Queen” (trade name) manufactured by Asahi Tech.

  On the other hand, the long stretchable material has a problem that if the tensile force at 300% elongation is less than 10 gf, sufficient strength cannot be obtained and the material may break during operation. It is preferably 10 gf or more. Further, by setting the tensile force at 300% elongation to 10 gf or more, it is possible to exhibit good fit even for a thin-body wearer, and effectively prevent the diaper from slipping down. . In order to obtain these effects more reliably, it is more preferable to use rubber having a tensile force of 12 to 35 gf at 300% elongation.

  The “tensile force at 300% extension” mentioned here means that when a tensilon tensile tester is used and the long stretchable material is repeatedly stretched within a stretch rate of 100 to 500%, two reciprocations are performed. It shall mean the tensile force measured at the time of 300% extension in the output path. Based on the tensile force at the time of 300% elongation, an average elongation rate in the use state is assumed. Also, the tensile force at the second round-trip is measured because the long elastic material is placed in the stretched state at the time of manufacture of the diaper. This is because the “second expansion” is considered to be performed.

  “Long stretchable material is repeatedly stretched within a stretch rate of 100 to 500%” means that a long stretchable material is stretched from a non-stretched state to a stretch rate of 500% and then stretched. This refers to repeated expansion and contraction, in which the operation until the return is performed is one expansion and contraction.

  Moreover, the disposable diaper of the present invention has a tensile force at the time of 300% extension in the second round trip when the belly stretchable material repeatedly stretches within the range of 100 to 500% stretch rate. It is preferably made of rubber showing a value of 75% or more of the tensile force at 300% elongation in the outward path. In other words, it is preferably made of a rubber whose tensile force is not easily reduced even if it is repeatedly expanded and contracted.

  Generally, when rubber is repeatedly expanded and contracted, the rubber is fully extended and cannot be completely restored to its original state. On the other hand, the rubber has a characteristic that a high tensile force is maintained even in the second reciprocating expansion and contraction. By using rubber having such characteristics, the rubber does not stretch even when worn, and an appropriate tightening force can be exhibited.

  In addition, the tensile force at the time of repeated expansion / contraction can be measured by the same measurement method as the “tensile force at 300% elongation” already described.

  As long as the rubber constituting the long stretchable material is a rubber having a tensile force at the time of 300% elongation in the two-way round trip of 40 gf or less when repeatedly stretched within a range of stretch rate of 100 to 500%, Any rubber material such as natural rubber and synthetic rubber can be used. For example, a rubber containing a natural rubber rich in flexibility and stretchability as a constituent component, or a synthetic rubber having the same flexibility and stretchability can be used. Stretch materials containing these rubbers are preferable in that it is possible to provide a disposable diaper having conflicting characteristics such as fit and softness.

  In the disposable diaper of the present invention, the stretchable material around the abdomen is fixed by an adhesive applied to a region where the long stretchable material is continuously arranged at a stretch rate of 300 to 500% and does not overlap at least the region where the absorber is disposed. After that, it is preferably cut in a region that overlaps with the region where the absorber is disposed.

  In addition, like the disposable diaper 1a shown in FIG. 4, when the absorber 22 is not arrange | positioned in the area | region where the abdominal circumference elastic material 42 is arrange | positioned, the abdominal circumference elastic material 42 comprises the abdominal circumference of a diaper. Since the entire region is the region Z that does not overlap with the absorber placement region, the long stretchable material constituting the belly stretchable material 42 is disposed within the range of the stretch rate of 300 to 500%. Here, FIG. 4 is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side.

  In addition, when placing a long stretchable material, placing and fixing it at a high stretch rate of 300% or more makes it difficult for the wearer to slip off the body even when the wearer is a narrow body, and good fit Can be obtained.

  On the other hand, the expansion ratio is set to 500% or less. By setting it to 500% or less, the stretchable material can be easily stretched, and the diaper can be easily applied. Further, it is possible to avoid an excessive tightening force from acting on the wearer, and to effectively prevent a problem that a feeling of tightness is given at the time of wearing or a rubber mark is attached to the skin. In order to obtain these effects more reliably, it is more preferable to continuously arrange the long stretchable material at an elongation rate of 330 to 470%. The “stretch rate” indicates the ratio (percentage) of the length in the stretched state to the length of the long stretchable material in the non-stretched state. That is, the stretch rate of the long stretchable material in the non-stretched state is 100%, and the stretch rate when the stretchable material is stretched twice is 200%.

  For example, the disposable diaper 1 shown in FIG. 1, FIG. 2A, FIG. 2B, FIG. 2C, and FIG. 3 has a stretchable material cutting roll 80 shown in FIG. It is an example of the disposable diaper cut | disconnected in the area | region which overlaps. In addition, the code | symbol 54 of FIG. 2B is a cutting trace of the elongate elastic material which comprises an abdominal circumference elastic material.

  The elastic material cutting roll 80 shown in FIG. 9 and FIG. 10 is disposed so as to oppose the first roll 84 having a plurality of cutting protrusions 82 (82a, 82b, 82c, 82d, 82e) and the first roll 84. The second roll 70 is provided. The cutting protrusion 82 is divided into a plurality of regions 86 (86a, 86b, 86c, 86d, 86e) that are divided along the rotation axis (O-O ') direction of the roll. In addition, the code | symbol 74 of FIG. 9 is a sending roll for sending out the sheet | seat material 79 which comprises an exterior member. In addition, it is preferable that it is 0.5-3 piece / cm in the direction of a side flap width as an arrangement | positioning space | interval of the belly circumference elastic material from which favorable fitting property is obtained, and it is 1-2 from a quality viewpoint. More preferably, it is / cm.

  Moreover, in the disposable diaper 1 shown in FIG. 1, although it becomes the structure which has arrange | positioned the absorber 22 with respect to the abdominal circumference exterior member 16 which comprises the back body and the abdominal circumference, for example, as shown in FIG. The abdominal circumference exterior member 16 may be arranged with respect to the absorbent body 22. Here, FIG. 11 is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. In the disposable diaper 1f shown in FIG. 11, elements that are the same as those shown in FIG.

  Moreover, in the disposable diaper 1 shown in FIG.1 and FIG.3, although it becomes the structure which clamped the belly circumference stretchable material 42 over the whole region of the belly circumference direction by the two sheet materials which comprise the exterior member 16, For example, in the case of a configuration in which the belly stretchable material is arranged only in a region that does not overlap with the absorber placement region (that is, a configuration in which the stretched belly stretchable material is not placed in the absorber placement region), for example, Although not shown in the drawings, the exterior member is formed of two sheets only for arranging the elastic material around the abdomen (that is, the region not overlapping with the absorber placement region), and the absorber placement region is the exterior member. May be formed of one sheet material.

  For example, the belly stretchable materials are arranged at intervals so that a plurality of stretchable materials are substantially parallel. Although there is no restriction | limiting in particular about this arrangement | positioning space | interval, It is preferable that the some elastic material is arrange | positioned by 3-10 mm space | interval.

  In the disposable diaper of the present invention, apart from the belly stretchable material as a tammy gather, a waist stretchable material may be arranged in the waist circumference opening and a leg circumference stretchable material in the leg circumference opening.

  A waist circumference elastic material is an elastic material arrange | positioned along the site | part corresponding to the waist circumference of the back body in the disposable diaper of this invention. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist when wearing diapers, preventing urine leakage from around the waist and improving the fit of the diaper to the wearer. Is prevented.

  As described above, in the case where the elastic material around the waist is arranged continuously in the stretched state along the opening around the waist, the waist circumference is larger than the stretch rate at which the belly elastic material is arranged. It is preferable to configure the stretch ratio at which the stretchable material is disposed low. Usually, in order to prevent leakage of excrement from around the waist, the stretch rate of the waist stretchable material is generally higher than that of the waist stretchable material. However, in the present invention, considering the reduction of the stretching force by the highly rigid absorbent body, the stretch rate of the waist stretchable material can be made lower than the waist stretchable material. This is because the absorber may not be disposed in the vicinity of the opening around the waist. Thereby, even when the wearer is a thick body type, in addition to being able to effectively prevent the waist from being tightened excessively, the effect of the present invention that the diaper is easy to put on and can be easily taken off is sufficiently exhibited. It becomes possible to make it.

  In FIG. 1, FIG. 2A, and FIG. 2B, the example in the case of the three waist circumference elastic materials 44 being arrange | positioned at equal intervals along the site | part corresponding to the waist circumference of the back body 6 is shown.

  Moreover, in the disposable diaper 1 shown in FIG. 1, the example in case the leg periphery expansion-contraction material 40 (40a, 40b) is arrange | positioned in the site | part which comprises the leg periphery of the diaper in the absorber 22 is shown.

  In the disposable diaper of the present invention, for example, as shown in FIG. 12, a cover sheet 17 corresponding to the overall shape of the disposable diaper 1 g is disposed on the back side of the diaper, and between the exterior member 16 and the cover sheet 17. The waist elastic member 44 and the leg elastic member 40 (see FIG. 11) may be disposed. By comprising in this way, each elastic material, such as a waist circumference elastic material, can be arrange | positioned favorably. In addition, in the disposable diaper 1g shown in FIG. 12, the T-shaped cover sheet 17 is used.

  Here, FIG. 12 is sectional drawing which shows the cross section which cut | disconnected the diaper in the width direction center part along the longitudinal direction of a diaper in other embodiment of the disposable diaper of this invention. In the disposable diaper 1g shown in FIG. 12, about the element which is common with each element shown in FIG. 11, the code | symbol same as FIG. 11 is attached | subjected and description is abbreviate | omitted.

  As described above, when the disposable diaper 1g of the present invention further includes the cover sheet 17, the cover sheet 17 also has a crotch part on the left and right side edge portions of the back body 6 corresponding to the exterior member 16. A cut portion 29 in which a part of the back body 6 is cut from the crotch 4 side toward the back body 6 side is formed at the end.

  In the disposable diaper of the present invention, for example, as shown in FIG. 13, the cover sheet 17 is disposed on the lower surface of the absorbent body 22, and the bottom of the three-dimensional gather 26 is extended outward in the width direction of the diaper, The leg-surrounding elastic member 40 may be disposed at a portion corresponding to the leg circumference of the diaper between the bottom of the three-dimensional gather 26 and the cover sheet 17. Here, FIG. 13 is sectional drawing which shows the cross section which cut other embodiment of the disposable diaper of this invention in the crotch part in the width direction of an absorber. In the disposable diaper 1h illustrated in FIG. 13, elements common to the elements illustrated in FIG. 1 are denoted by the same reference numerals as those in FIG. 1 and description thereof is omitted.

  Moreover, in the disposable diaper which has arrange | positioned the cover sheet | seat on the back surface of a disposable diaper, it was comprised as shown to FIG. 14A and FIG. 14B, for example. Here, FIG. 14A is a cross-sectional view showing a cross section of the back body of the diaper cut along the width direction in another embodiment of the disposable diaper of the present invention, and FIG. 14B is another view of the disposable diaper of the present invention. It is a schematic sectional drawing which shows embodiment of this, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown to FIG. 14A along the EE 'line.

  Further, in the disposable diaper of the present invention, for example, as shown in FIG. 15, two exterior members 16 are provided only in a region where the abdominal circumference stretchable material 42 is disposed (that is, a region not overlapping with the region where the absorbent body 22 is disposed). The outer member 16 may be formed of one sheet material in the arrangement region of the absorber 22, and the cover sheet 17 may be disposed on the back surface of the outer member 16. Here, FIG. 15 is sectional drawing which shows the cross section which cut | disconnected the back body of the diaper along width direction in further another embodiment of the disposable diaper of this invention. In the disposable diapers 1i and 1j shown in FIG. 14A, FIG. 14B, and FIG. 15, elements common to the elements shown in FIG.

[1-9] Skin contact sheet:
The disposable diaper of the present invention may further include a skin contact sheet 24 disposed above the top sheet 18 like a disposable diaper 1k shown in FIGS. 16 and 17. The skin contact sheet 24 is a member for separating the wearer's skin and the top sheet 18. The skin contact sheet 24 is disposed above the top sheet 18, and is formed in a sheet shape in which a stool passing opening 28 a through which stool can pass is formed. It is a member. Here, FIG. 16 is a plan view showing another embodiment of the disposable diaper of the present invention, and is a view showing a state seen from the top sheet side, and FIG. 17 is a view of the disposable diaper shown in FIG. It is a schematic sectional drawing which shows the cross section cut | disconnected along B 'line.

  As a material constituting the skin contact sheet, for example, a nonwoven fabric made of a resin such as polyethylene, polypropylene, or polyester, a mesh sheet, or a film can be used. Especially, it is preferable to use a nonwoven fabric in the point that the touch is favorable. These materials may be liquid permeable, liquid impermeable, or water repellent. However, a water repellent material (such as a water repellent nonwoven fabric) is preferable in that it can maintain a light touch (dryness) even when worn for a long time.

  The skin contact sheet needs to be formed with an opening (stool passing opening) through which the stool excreted by the wearer can pass. By adopting such a structure, the feces excreted by the wearer pass through the skin contact sheet and fall onto the top sheet, greatly reducing the chance of direct contact between the feces and the wearer's skin. It becomes possible. That is, a shielding layer called a skin contact sheet is interposed between the top sheet and the wearer's skin. Therefore, even if the stool remains on the top sheet, it is possible to greatly reduce the chance that the stool and the skin of the wearer are in direct contact.

  When the disposable diaper of the present invention further includes a skin contact sheet, when the wearer wears the diaper, the stool passage opening of the skin contact sheet is disposed at the position of the wearer's anus. Adjust the position of the front body of the diaper in the vertical direction on the ventral side according to the wearer's body shape, and fix the back and front body of the diaper with fastening tape in that state. Can do.

  As long as the feces passage opening has a shape capable of passing feces, there is no particular limitation on the shape. That is, the "opening" through which stool can pass includes not only so-called openings (holes) such as circular openings, elliptical openings, rhombus openings, but also linear slits, cross-shaped slits, three or more slits. Slits such as star-shaped slits that intersect are included. Among these, an elliptical opening or a star-shaped slit whose longitudinal direction is the longitudinal direction (longitudinal direction) of the diaper is preferable. The oval opening has the advantage that stool is easy to pass through the stool passage opening of the skin contact sheet, and the star-shaped slit once passes through the stool passage opening of the skin contact sheet and then the top sheet. There is an advantage that it is possible to effectively prevent the stool falling on the stool from being exposed again from the stool passage opening of the skin contact sheet and contaminating the wearer's buttocks.

  For example, the disposable diaper 1k shown in FIG. 16 is an example in which an elliptical opening that is long in the front-rear direction of the diaper is formed as a stool passing opening 28a in a portion corresponding to the crotch part 4 of the diaper of the skin contact sheet 24. It is. The size of the hole or slit may be appropriately determined in consideration of the function of “passing stool”.

  For example, like the disposable diaper 1l shown in FIG. 18, it is also preferable that the skin contact sheet 24 has a urine passage opening 28b formed on the front body side of the stool passage opening 28a. one of. That is, it is preferable that the skin contact sheet 24 further includes a urine passage opening 28b in addition to the stool passage opening 28a. Here, FIG. 18 is a plan view showing another embodiment of the disposable diaper of the present invention, and is a view showing a state viewed from the top sheet side. In addition, in the disposable diaper 1l shown in FIG. 18, about the element which is common with each element shown in FIG. 16, the same code | symbol as FIG. 16 is attached | subjected and description is abbreviate | omitted.

  By forming the urine passage opening 28b as described above, the urine excreted by the wearer through the urine passage opening 28b surely flows into the space between the skin contact sheet 24 and the top sheet 18. It is possible to effectively prevent a situation in which urine diffuses through the skin contact sheet 24 and causes side leakage from the leg openings 12a, 12b, etc. of the diaper. It is possible to effectively prevent mixing.

  Moreover, in the disposable diaper of this invention, it is preferable that the elastic material is arrange | positioned at the skin contact sheet. Among these, those in which an opening stretchable material is disposed on the outer edge of the feces passage opening are preferable. When the opening stretchable material is disposed, the skin contact sheet is difficult to fall to the top sheet side, and the skin contact sheet is easily brought into contact with the wearer's skin. In addition, it is possible to maintain the skin contact sheet floating from the top sheet and reliably separate the skin contact sheet and the top sheet. However, in the disposable diaper of the present invention, the opening stretchable material is not an essential member and may not be disposed.

  As the opening stretchable material, stretchable materials that have been used in conventional disposable diapers can be suitably used. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc., as well as thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.). .

  The arrangement pattern of the opening stretchable material is not particularly limited as long as it is a pattern that can exert the above-described effect, but the opening stretchable material surrounds the periphery of the opening so as to make the stretching force act reliably on the opening. It is preferable to arrange in a pattern. For example, the opening stretchable material may be arranged in a pattern such as a circle, an ellipse, or a rhombus so as to surround the periphery of the opening.

  Also, a pattern in which two opening elastic members are used as the opening elastic members, and the two opening elastic members intersect at at least one point before and after the opening and surround a part of the periphery of the opening. It is also one of the preferable forms that it is arrange | positioned. When the opening stretchable material is arranged in such a pattern, the opening stretchable material can be continuously arranged in the front-rear direction of the diaper, so that continuous production of the disposable diaper is facilitated.

  For example, the disposable diaper 1l shown in FIG. 18 uses two opening elastic members 30a and 30b as the opening elastic members 30, and the two opening elastic members 30a and 30b are the stool passage opening 28a and the urine. This is an example in which they are arranged in a pattern that intersects at a point between the passage openings 28b and surrounds part of the periphery of the stool passage opening 28a and the urine passage opening 28b. When the opening elastic members 30a and 30b are arranged in such a pattern, it is possible to easily manufacture an absorbent main body continuous body in which the absorbent main body 14 is continuously arranged in the longitudinal direction.

  Moreover, the disposable diaper 1l shown in FIG. 18 is the arrangement | positioning in which the opening expansion-contraction materials 30a and 30b cross | intersect in the center of the crotch part 4. FIG. By adopting such an arrangement, it is possible to exert a greater stretching force in the width direction (diaper left-right direction) in the crotch part 4 (that is, in the vicinity of the point P) than in the front body 2 side and the back body 6 side of the diaper. it can. Therefore, the portion between the stool passage opening 28a and the urine passage opening 28b, which is relatively loose in the skin contact sheet 24, can be more closely attached to the wearer's skin.

  Further, in the disposable diaper 11 shown in FIG. 18, the opening elastic members 30a and 30b do not intersect except at the central point P of the crotch part 4, and the rim and urine on the back body 6 side of the feces passage opening 28a It arrange | positions in the pattern by which the peripheral part by the side of the front body 2 of the opening part 28b for opening was open | released. By setting it as such an arrangement | positioning, since the front body 2 side and the back body 6 side of the skin contact sheet 24 do not adhere too much with respect to a wearer's skin, air permeability can be ensured. Therefore, sweating due to the contact of the skin contact sheet is suppressed, and stuffiness and skin trouble caused by sweat can be effectively prevented.

  The opening stretchable material as described above is fixed to the skin contact sheet by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

  The opening stretchable material is preferably fixed in an expanded state in order to cause a sufficient stretching force to act on the opening. For example, when the opening stretchable material is natural rubber or synthetic rubber, it is preferably fixed in a stretched state of 120 to 400%, and more preferably fixed in a stretched state of 200 to 300%. By fixing in the extended state in such a range, it is possible to cause a sufficient stretching force to act on the opening and to prevent the opening from being reduced more than necessary.

  The arrangement method of the opening stretchable material is not particularly limited. For example, like the disposable diaper 1k shown in FIG. 17, the skin contact sheet 24 is bonded to two sheet materials (upper sheet 24a and liner sheet 24b). It is preferable that the opening stretchable members 30a and 30b are sandwiched between the upper sheet 24a and the liner sheet 24b. Employing such an arrangement method is preferable because it exerts the effects of imparting an elastic force to the skin contact sheet with the minimum necessary elastic material and supporting the raised portion.

  The disposable diaper 1k shown in FIGS. 16 and 17 has a shape that covers the entire surface of the top sheet 18 as the skin contact sheet 24. However, the skin contact sheet in the disposable diaper of the present invention is not limited to this, and a sheet body disposed above the surface of the top sheet is sufficient.

  As a fixing method of the skin contact sheet, (1) like disposable diapers 1k shown in FIG. 17, the sheet materials 32a and 32b constituting the three-dimensional gathers 26a and 26b and the top sheet 18 (or the back sheet 20) A method of fixing the skin contact sheet 24 so as to be sandwiched between the bonded portions, (2) a skin contact sheet on the inner surface of the three-dimensional gather, between the upper edge and the lower end edge (standing line) of the three-dimensional gather The method of fixing can be mentioned. Moreover, you may fix a skin contact sheet to the inner area | region enclosed by the solid gather which becomes a pair, without making it contact with a solid gather. For example, (3) a method of fixing a skin contact sheet to a bonded portion (so-called flap portion) between a top sheet and a back sheet in a region surrounded by a three-dimensional gather can be exemplified. Among these methods, the method (1) is preferable in that the effect of closely attaching the skin contact sheet to the wearer's skin is high.

[1-9a] Urine separation wall:
In the disposable diaper of the present invention, the space between the skin contact sheet and the top sheet is preferably partitioned into a space communicating with the fecal passage opening and a space on the front body side. Such a configuration makes it difficult for urine and feces to be mixed, and diaper rash due to the generation of ammonia can be effectively prevented.

  The form of partitioning the space as described above is a urine stool that consists of a breathable water-repellent sheet and partitions the space formed between the skin contact sheet and the back body side surface of the top sheet from the space on the front body side It is preferable that the urine / feces separation wall is further formed by joining one end of the breathable water-repellent sheet to the front end of the skin contact sheet and hanging the other end to the surface of the top sheet.

  For example, the disposable diaper 1k shown in FIGS. 19 and 20 includes a breathable water-repellent sheet 52, and urine / feces partition a space 46 formed between the skin contact sheet 24 and the top sheet 18 from the space on the front body 2 side. The urine / feces separation wall 48 is further provided with a separation wall 48, one end of the breathable water-repellent sheet 52 is joined to the front end portion of the skin contact sheet 24 (joint portion 62), and the other end is suspended to the surface of the top sheet 18, It is formed by joining (joining part 66).

  In this example, the air permeable and water repellent sheet 52 is bent into a Z-shaped cross section, and the portions other than the joint portions 62 and 66 are not fixed. Therefore, the urine / feces separation wall 48 has an advantage that the rise of the skin contact sheet 24 is hardly inhibited. However, in the disposable diaper of the present invention, the urine / feces separation wall is not an essential member and may not be disposed. That is, the space formed between the skin contact sheet and the top sheet may be opened forward.

  Here, FIG.19 and FIG.20 is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention, FIG.19 cut | disconnected the disposable diaper shown in FIG. 16 along CC 'line | wire. FIG. 20 is a schematic sectional view showing a section, and FIG. 20 is a schematic sectional view showing a section obtained by cutting the disposable diaper shown in FIG. 16 along the line DD ′.

  In the disposable diaper 1k shown in FIGS. 19 and 20, a space 46 formed between the skin contact sheet 24 and the top sheet 18 is open toward the rear side. You may partition from. Thereby, the situation where a soft stool or watery stool wraps around the wearer's back and leaks from the opening around the waist can be effectively prevented. For example, it is possible to partition the space by forming the separation wall with the same configuration as the urine / feces separation wall or by fixing the rear end of the skin contact sheet to the top sheet.

  Moreover, in the disposable diaper 1k shown in FIG.19 and FIG.20, although the other end of the ventilation water-repellent sheet | seat 52 is being fixed to the surface of the top sheet 18, the disposable diaper of this invention is limited to such a form. It is not a thing. For example, it is possible to partition the space just by hanging a breathable water-repellent sheet with one end fixed to the skin contact sheet so as to cover a part of the surface of the top sheet, and the same effect as when the other end is fixed Obtainable.

  In addition, it is also preferable that the front end portion of the skin contact sheet is joined to the surface of the top sheet, and the space formed between the skin contact sheet and the top sheet is partitioned from the space on the front body side.

  The structure will be described by taking a disposable diaper 1m shown in FIG. 21 as an example. FIG. 21 is a schematic cross-sectional view showing still another embodiment of the disposable diaper of the present invention, and is a drawing corresponding to the D-D ′ cross-sectional view (that is, FIG. 20) of the disposable diaper 1 k shown in FIG. 16. In the disposable diaper 1m shown in FIG. 21, the elements common to the elements shown in FIG. 16 are denoted by the same reference numerals as those in FIG.

  A disposable diaper 1m shown in FIG. 21 has a front end portion of a skin contact sheet 24 folded into a Z-shaped cross section and joined to the surface of the top sheet 18 between the skin contact sheet 24 and the top sheet 18. The formed space 46 is partitioned from the space on the front body 2 side.

  However, the disposable diaper of this invention is not limited to a form as shown in FIG. For example, it is possible to partition the space only by dropping the front end portion of the skin contact sheet so as to cover a part of the surface of the top sheet, and the same effect as when the front end portion is fixed can be obtained.

  In the disposable diaper 1m shown in FIG. 21, the skin contact sheet 24 is joined to the surface (flap portion) of the top sheet 18 after the rear end of the skin contact sheet 24 is bent into a Z-shaped cross section. A space 46 formed with the top sheet 18 is also partitioned from the space behind the skin contact sheet. However, such a configuration is not essential and may or may not be adopted. For example, the separation wall may be formed with the same structure as the urine / feces separation wall already described, or the space formed between the skin contact sheet and the top sheet may be similar to the disposable diaper 1k shown in FIG. It is good also as a structure open | released toward a rear side.

[1-10] Solid gather:
In order to prevent the side leakage of the urine excreted by the wearer, a three-dimensional gather may be provided. The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming such a three-dimensional gather, the three-dimensional gather serves as a breakwater, and leakage from a leg-diameter opening or the like (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, a stretchable material (a three-dimensional gathered stretchable material) disposed on a part of the water-repellent sheet material and a sheet (gather) formed on the sheet material by the three-dimensional gathered stretchable material can be suitably used.

  The three-dimensional gather can be formed by folding back the top sheet or the back sheet, or can be formed by bonding a completely separate sheet material. For example, the disposable diaper 1 shown in FIG. 1 is an end of a sheet material 32 (32a, 32b) that is completely different from the top sheet 18 and the back sheet 20 (the end corresponding to the upper end edge 34 of the three-dimensional gathers 26a, 26b). Part), and a pair of three-dimensional gathers 26 (26a, 26b) are formed by placing two three-dimensional gather elastic members 36a, 36b or three-dimensional gather elastic members 36c, 36d between the folded portions. .

  In order to prevent leakage from the crotch part, this three-dimensional gather may be formed at least in the crotch part, but may be formed in the front body or the back body. For example, in the disposable diaper 1 shown in FIG. 1, a pair of three-dimensional gathers 26 (26a, 26b) are continuously formed from the crotch part 4 to both the front body 2 and the back body 6 along the longitudinal direction of the diaper. is doing. Moreover, it is preferable to form at least one pair of solid gathers, and two or more pairs may be formed.

  The three-dimensional gather may be an inward gather that tilts toward the inside of the diaper, or may be an outward gather that tilts toward the outside of the diaper. Moreover, it can also be set as the three-dimensional gathers (C fold gather, Z fold gather, etc.) which formed the bending part and the folding | turning part in a part of height direction. For example, the disposable diaper 1 shown in FIG. 3 is an example in which the three-dimensional gathers 26 (26a, 26b) are inwardly gathered.

[2] How to wear the disposable diaper of the present invention:
About the wearing method of the disposable diaper of this invention, the method of wearing the disposable diaper 1 shown in FIG. 1 is demonstrated as an example. When the disposable diaper 1 shown in FIG. 1 is worn, first, the back body 6 of the deployed disposable diaper 1 as shown in FIG. 1 is directed to the wearer's back side (back of the body), and then FIG. As shown in FIG. 4, the front body 2 is lifted to the wearer's ventral side (front of the body) through the crotch part 4 through the crotch of the wearer.

  Thereafter, as shown in FIG. 2A, the left and right side edges 6a and 6b of the back body 6 are moved to the abdomen via the wearer's flank, and the left and right sides are moved to the attachment region 15 formed on the front body 2. Fastening members 13 extending from the side edges 6a and 6b are fastened. Thus, the disposable diaper 1 of this invention can be worn. When worn by the above method, it is possible to attach and detach without removing all the clothes. Here, FIG. 22 is a front view for explaining the wearing procedure of the disposable diaper shown in FIG.

  Moreover, when taking off the worn disposable diaper 1, the clothes can be removed without removing all the clothes by peeling off the fastening member 13. Of course, it is also possible to pull down the diaper and pull out each leg from the leg openings 12a, 12b (see FIG. 2A) in the same manner as taking off normal pants.

  Moreover, the disposable diaper of the present invention does not wear the unfolded diaper as described above, and after assembling the diaper in a pants-type state in advance according to the above method, You may wear a diaper by inserting each leg into the opening.

[3] Method for producing disposable diapers:
Hereinafter, the manufacturing method of the disposable diaper of this invention is demonstrated in the example in the case of manufacturing the disposable diaper 1i provided with the cover sheet 17 as shown to FIG. 14A on the back side of a diaper.

  First, two long nonwoven fabrics are prepared, and an abdominal circumference stretchable material 42 and a waist circumference stretchable material are arranged and bonded and fixed to the upper surface of one of these nonwoven fabrics.

  Next, another non-woven fabric is laminated and fixed on the upper surface of the non-woven fabric on which each elastic material is arranged and fixed as described above, so that the abdominal circumference elastic material 42 and An elongated exterior member continuous body is obtained in which a plurality of exterior members 16 interposing waist elastic members are continuous. Thereafter, this exterior member continuous body is cut into individual exterior members 16.

  Next, the back sheet 20 is disposed on the upper surface of the cover sheet 17 corresponding to the overall shape of the diaper, and the exterior member 16 is disposed on the upper surface of the back sheet 20. Furthermore, the absorber 22 wrapped in the hydrophilic sheet is disposed on the upper surface, and the top sheet 18 is disposed on the upper surface. Next, sealing is performed so that the peripheral edge of the absorber 22 is sandwiched between the top sheet 18 and the back sheet 20.

  Next, using a roller having a cutting blade corresponding to the shape of the notch 29 of the back body 6 on the outer peripheral surface and a plain roller, the notch 29 is formed in the exterior member 16 through the exterior member 16 between both rollers.

  Next, the three-dimensional gather for arrange | positioning to the disposable diaper 1 is produced. Specifically, one end portion of the sheet material 32a (32b) is folded, and the three-dimensional gather 26a (26b) is bonded to the folded portion with the two three-dimensional gather expansion / contraction materials 36a (36b) sandwiched therebetween. )

  The three-dimensional gathers 26a and 26b are attached by sticking the lower ends of the three-dimensional gathers 26a and 26b thus obtained to the side edge side of the absorber 22.

  Next, a fastening member 13 having a fastening part 21 for fixing the back body 6 and the front body 2 is attached to the left and right side edges 6a and 6b of the back body 6 in the exterior member as shown in FIG. The fastening tape 13a as the fastening member 13 is manufactured by disposing a fastening portion 21 (for example, a hook material of a mechanical fastener) that can be attached to the fastening region on one surface of the base material 25. Can do. In addition, it is preferable that a fastening tape arrange | positions a tape base part to an exterior member continuous body, and is joined and fixed in the state which folded the tape part.

  Next, in the vicinity of the left and right side edges of the front body 2 on the back surface of the back sheet 20, a to-be-attached region 15 for attaching the fastening tape 13 is attached. As the to-be-attached area | region 15, when the fastening part 21 of the fastening member 13 is a hook material of a mechanical fastener, the loop material of a mechanical fastener etc. can be used, for example. In addition, as the to-be-attached area | region 15 used for the disposable diaper of this invention, the width | variety in an abdominal circumference direction uses the same thing as the width | variety of the fastening part of a fastening member. Thus, the disposable diaper of this invention can be manufactured.

  In the case of manufacturing a disposable diaper having a skin contact sheet as shown in FIG. 16, the skin contact sheet 24 is manufactured by the following method, and the surface of the top sheet 18 constituting the absorbent main body 14 is manufactured. The step of joining and fixing the front end side, the rear end side, and the left and right side edges of the skin contact sheet 24 (liner sheet 24b) may be further provided.

  When manufacturing the skin contact sheet, first, the upper sheet 24a is bonded to the upper surface of the liner sheet 24b while arranging the two opening elastic members 30a and 30b in a predetermined pattern. At this time, the two opening elastic members 30a and 30b intersect at a point on the front side of the stool passage opening 28a to be formed later and surround a part of the periphery of the stool passage opening 28a. Deploy.

  Next, the feces passage opening 28a is formed in the liner sheet 24b and the upper sheet 24a which are bonded together. By doing so, the two opening elastic members 30a and 30b intersect at a point on the front side of the fecal passage opening 28a and are arranged in a pattern surrounding a part of the periphery of the fecal passage opening 28a. A skin contact sheet 24 having a two-layer structure is obtained. The skin contact sheet may be provided with a urine passage opening separately from the stool passage opening 28a, or may be provided with a breathable water-repellent sheet serving as a urine / feces separation wall.

  The disposable diaper of the present invention can be suitably used as a diaper for infants or for adults such as elderly people and persons with disabilities who need care. The disposable diaper of the present invention can be attached and detached without taking off all the clothes, can raise and lower the diaper even when worn, and has excellent fit.

It is a top view which shows one Embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is a front view which shows the wearing condition of the disposable diaper shown in FIG. It is a rear view which shows the wearing condition of the disposable diaper shown in FIG. It is a side view which shows the wearing condition of the disposable diaper shown in FIG. It is a schematic sectional drawing which shows one Embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 1 along the A-A 'line. It is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is a front view which shows the wearing condition of the disposable diaper in other embodiment of the disposable diaper of this invention. It is a schematic sectional drawing which shows typically one Embodiment of the manufacturing apparatus used for manufacture of the disposable diaper of this invention. It is a schematic front view which shows one Embodiment of the elastic material cutting roll which is a part of manufacturing apparatus of FIG. It is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is sectional drawing which shows the same cross section as sectional drawing shown in FIG. 3 in other embodiment of the disposable diaper of this invention. It is sectional drawing which shows the cross section which cut other embodiment of the disposable diaper of this invention in the crotch part in the width direction of an absorber. It is sectional drawing which shows the cross section which cut | disconnected the back body of the diaper along the width direction in other embodiment of the disposable diaper of this invention. It is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown to FIG. 14A along E-E 'line. It is sectional drawing which shows the cross section which cut | disconnected the back body of the diaper along width direction in further another embodiment of the disposable diaper of this invention. It is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 16 along the B-B 'line. It is a top view which shows other embodiment of the disposable diaper of this invention, and is a figure which shows the state seen from the top sheet side. It is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 16 along the C-C 'line. It is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 16 along the D-D 'line. It is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper longitudinally along the centerline. It is a front view for demonstrating the wearing procedure of the disposable diaper shown in FIG.

Explanation of symbols

1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1k, 1l, 1m: disposable diapers, 2: front body, 4: crotch, 6: back body, 6a, 6b: Side edges (side edges of the back body), 7: side flaps, 12, 12a, 12b: openings around the legs, 13: fastening members, 13a, 13b: fastening tape, 14: absorbent main body, 15, 15a, 15b: Attachment area, 16: Exterior member (belly circumference exterior member), 18: Top sheet, 20: Back sheet, 21: Attachment part, 22: Absorber, 23: Pick part, 24: Skin contact sheet, 24a: upper sheet, 24b: liner sheet, 25: base material (base material for fastening tape), 26, 26a, 26b: three-dimensional gather, 27: opening around waist, 28a: opening for passing stool, 28b: Urine passage opening, 29: cut 30, 30a, 30b: opening stretchable material, 31: restraining sheet, 32, 32a, 32b: sheet material, 34: upper edge, 36a, 36b, 36c, 36d: three-dimensional gather stretchable material, 40, 40a, 40b: elastic material around leg, 42: elastic material around waist, 44: elastic material around waist, 46: space, 48: urine / feces separation wall, 52: breathable water repellent sheet, 54: cut mark, 62, 66: joint , 70: second roll, 74: delivery roll, 79: sheet material, 80: elastic material cutting roll, 81: first roll, 82, 82a, 82b, 82c, 82d, 82e: cutting protrusion, 84: first roll 86, 86a, 86b, 86c, 86d, 86e: region, X: abdominal circumference direction, Y: absorber placement region, Z: region not overlapping the absorber placement region.

Claims (7)

Consists of each part of the front body, the crotch and the back body,
An absorbent, a topsheet that is disposed so as to cover the upper surface of the absorber, at least partially made of a liquid-permeable material, and a liquid that is disposed so as to cover the lower surface side of the absorber. A back sheet made of an impermeable material, and the back body and the front body, which are respectively disposed in the vicinity of the left and right side edges of the back body, or extended at least one from the left and right side edges of the back body A plurality of fastening members for fixing the upper body, a fastening region attached to the front body, for fastening the fastening members on the left and right sides, and abdominal circumference direction of the rear body With elastic material around the belly,
The left and right side edge portions of the back body become diaper side flaps, and the left and right side edge portions of the back body are routed through the wearer's flank, and the fastening member is attached to the attachment region of the front body. A disposable diaper that can be used as a pants-type diaper.
Cuts in which a part of the back body is cut from the crotch side toward the back body side at the crotch side end portions of the side flaps constituted by the left and right side edge portions of the back body A disposable diaper in which the part is formed.   The disposable diaper according to claim 1, wherein the cut portion is formed in a portion corresponding to the left and right iliac ridges of the wearer when wearing the diaper, or a portion corresponding to the front side of the iliac ridge.   The said cut | notch part is formed over a part of area | region where the said abdominal circumference elastic material is arrange | positioned, and a part of said abdominal circumference elastic material is cut | disconnected by the said notch part. Disposable diapers.   The disposable diaper according to any one of claims 1 to 3, wherein the fastening member is disposed on a part of the rear end side near the left and right side edges of the back body.   The disposable diaper according to any one of claims 1 to 3, wherein the fastening member is extended from a part of the rear end side of the left and right side edges of the back body.   The attachment area is provided one by one near the left and right side edges of the front body, and the corresponding left and right attachment members can be attached to the attachment area, respectively. The disposable diaper as described in any one of Claims 1-5.   The disposable diaper according to any one of claims 1 to 6, wherein the fastening member has a knob portion including a non-fastening portion at a tip side portion.

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