JP7227023B2 - Individually packaged absorbent article - Google Patents

Description

The present invention relates to an individually packaged absorbent article in which a longitudinally elongated absorbent article is individually packaged with an individually packaged sheet, wherein at least a part of the section of the individually packaged sheet in the longitudinal direction is provided with an extensible material that can be stretched in the longitudinal direction. The present invention relates to an individually packaged absorbent article provided with a portion.

Conventionally, absorbent articles N such as sanitary napkins, panty liners, panty liners, panty sheets, and incontinence pads include, for example, a liquid-impermeable backsheet 50 made of a polyethylene sheet or a polyethylene-laminated nonwoven fabric, as shown in FIG. and a liquid-permeable surface sheet 51 made of non-woven fabric or permeable plastic sheet, etc., and an absorber 52 made of cotton-like pulp or the like is interposed therebetween, and in order to prevent slippage in the worn state, for example, the main body portion 1 or a plurality of streaks of pressure-sensitive adhesive layers 53, 53 are formed on the non-skin-contacting side (the outer surface of the liquid-impermeable backsheet 50).

On the other hand, when the absorbent article N is packaged individually, as shown in FIG. After placing the individual packaging sheet 61 and folding the absorbent article N, the release sheet 60 and the individual packaging sheet 61 together in three or four in the longitudinal direction, the open side edge portions are sealed by heat sealing and unsealed. A method of fixing the part with a tag tape 62 is common.

When using such an individually packaged absorbent article, the tag tape 62 is removed, the absorbent article N is unfolded in the longitudinal direction, and the absorbent article N is taken out. When disposing of the used absorbent article, after rolling the used absorbent article in the longitudinal direction, the new absorbent article N is wrapped in the individual packaging sheet 61 taken out, and the ends are fastened with the tag tape 62. In many cases, they are discarded in a worn state.

For such individually packaged absorbent articles, various products have been developed in which methods for discarding used absorbent articles are improved. For example, in Patent Document 1 below, at least a part of the packaging film has a bag-shaped portion, and when replacing the napkin, the used napkin is put in the bag-shaped portion of the packaging film after the new sanitary napkin is taken out and discarded. A method for doing so is disclosed.

Further, in Patent Document 2 below, the non-skin surface side of the backsheet has a tape member arranged inside the outer edge of the absorbent article, and the tape member is arranged outside the outer edge of the absorbent article. After the absorbent article is used, the tape member which is configured to be extendable and is extended outside is attached to the adhesive portion provided on another part of the backsheet to maintain the absorbent article in a rolled state. A method is disclosed that allows for

JP-A-2001-87306 Japanese Unexamined Patent Application Publication No. 2018-993

However, when a nighttime napkin is worn at bedtime and is replaced with a daytime napkin after waking up, even if the used nighttime napkin is rolled up in the longitudinal direction and wrapped in a newly taken out daytime napkin individual packaging sheet, Since nighttime napkins are much larger than daytime napkins, they cannot be completely wrapped in daytime napkin packaging sheets, and the rolled up state of used napkins may be released, exposing the areas that absorb menstrual blood. there were.

In the individual package described in Patent Document 1, when the used napkin is larger than the bag-like portion of the packaging film, it is difficult to put it into the bag-like portion. Also, if you try to roll it up into a small size and force it into it, the frequency of touching the unsanitary used napkin increases, which poses a hygiene problem. On the other hand, in the absorbent article described in Patent Document 2, the absorbent article is rolled up using a tape member provided in advance on the absorbent article without using the individual packaging sheet of the newly taken absorbent article. However, it is not hygienic because it is necessary to hold the unsanitary used absorbent article by hand until the end. Further, after the used absorbent article is rolled up in the longitudinal direction, if the outer surface of the used absorbent article is not covered at least in the longitudinal direction with the individual packaging sheet, there is a risk of odor diffusion and bleeding of menstrual blood.

SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to provide an individually packaged absorbent article that can easily and hygienically wrap even a large used absorbent article.

In order to solve the above problems, the present invention according to claim 1 is an individually packaged absorbent article comprising a vertically long absorbent article and an individually packaged sheet for individually packaging the absorbent article,
The individual packaging sheet is provided with a stretchable portion that can be stretched in the longitudinal direction in at least a partial section in the longitudinal direction, and the stretchable portion is a stretchable sheet that can be stretched in the longitudinal direction. It is arranged in a state of being joined to the individual packaging sheet by the elastic sheet fixing portions provided at both ends of the individual packaging sheet, and at a position overlapping the elastic sheet in plan view and between the elastic sheet fixing portions, the individual An individually packaged absorbent article is provided in which a packaging sheet is formed so as to be longitudinally divisible .

In the invention according to claim 1, since at least a part of the section in the longitudinal direction of the individual packaging sheet is provided with an extensible portion that can be extended in the longitudinal direction, the individual packaging sheet from which a new absorbent article has been taken out is provided. Thus, even when wrapping a used absorbent article that is larger than the removed absorbent article, it can be easily wrapped by stretching the extensible portion. In addition, since the used absorbent article is wrapped in the individual packaging sheet, the opportunity to touch the used absorbent article is reduced, and the rolled state can be reliably maintained, which is hygienic.

In the extensible portion, an elastic sheet that can be stretched in the longitudinal direction is arranged in a state in which it is joined to the individual packaging sheet by elastic sheet fixing portions provided at both ends in the longitudinal direction. The individual packaging sheet is formed so as to be split in the longitudinal direction between the elastic sheet fixing portions at positions overlapping with the sheet .

In order to extend the extensible portion configured in this way in the longitudinal direction, the individual packaging sheet is pulled in the longitudinal direction to divide the individual packaging sheet in the longitudinal direction, and the divided individual packaging sheets are straddled. It can be achieved by stretching the provided stretchable sheet.

As the present invention according to claim 2 , the individually packaged absorbent article includes a release sheet covering the anti-slip adhesive layer provided on the absorbent article,
The release sheet is bonded to the individual packaging sheet at a release sheet fixing portion provided on the outer side in the longitudinal direction of the extensible portion, and is positioned so as to overlap the extensible portion in plan view. The individually packaged absorbent article according to claim 1 is provided, wherein the is formed so as to be longitudinally divisible.

In the invention according to claim 2 , in the case where the absorbent article is provided with a release sheet covering the slip-preventing pressure-sensitive adhesive layer, the release sheet is joined to the individual packaging sheet at a predetermined release sheet fixing portion and , is formed so as to be splittable in the longitudinal direction at predetermined positions. As a result, the release sheet is split in the longitudinal direction by stretching the individual packaging sheet in the longitudinal direction at the extensible portion. Since the release sheets divided in the longitudinal direction are respectively joined to the individual packaging sheets by the release sheet fixing portions, they do not come off from the individual packaging sheets and can be easily disposed of as waste together with the individual packaging sheets. Become.

As the present invention according to claim 3 , there is provided the individually packaged absorbent article according to claim 2 , wherein perforations extending in the width direction are provided at predetermined positions of the release sheet.

In the invention according to claim 3 , when the individual packaging sheet is pulled in the longitudinal direction to extend the extensible portion, the release sheet is easily split in the longitudinal direction. It has perforations across the width.

As the present invention according to claim 4 , at the position where the release sheet is divided , concave portions are formed by recessing the contour lines on both sides in the longitudinal direction of the release sheet in the width direction. A individually packaged absorbent article as described is provided.

In the invention according to claim 4 , by forming recesses by recessing the contour lines on both sides in the longitudinal direction of the release sheet in the width direction at the positions where the release sheet is divided, the recesses form the release sheet in the longitudinal direction. It serves as a starting point for tearing in the direction, and makes it easier to split the release sheet in the longitudinal direction at a predetermined position.

As described in detail above, according to the present invention, even a large used absorbent article can be easily and hygienically wrapped.

1 is a partially broken development view of an individually packaged absorbent article according to a first embodiment; FIG. FIG. 2 is a cross-sectional view thereof (a view taken along the line II--II in FIG. 1); FIG. 2A is a plan view of an individually packaged sheet 11, with (A) showing an individually packaged state and (B) showing an expanded state. 1 is a plan view of an individual packaging sheet 11 and a release sheet 10 according to a first embodiment; FIG. FIG. 4 is a vertical cross-sectional view (view taken along line VV in FIG. 4). 2 is a plan view of the individual packaging sheet 11 and the release sheet 10 in their stretched state. FIG. FIG. 8 is a plan view of an individual packaging sheet 11 and a release sheet 10 according to a second embodiment; 2 is a plan view of the individual packaging sheet 11 and the release sheet 10 in their stretched state. FIG. FIG. 11 is a plan view of an individual packaging sheet 11 and a release sheet 10 according to a third embodiment; FIG. 9 is a longitudinal cross-sectional view thereof (a view taken along line XX in FIG. 9). 2 is a plan view of the individual packaging sheet 11 and the release sheet 10 in their stretched state. FIG. FIG. 2 is a development view showing a conventional absorbent article N; It is a perspective view which shows the individual packaging procedure.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the individually packaged sanitary napkin according to the present invention has a structure comprising a vertically elongated sanitary napkin 1 and an individually packaged sheet 11 for individually packaging the sanitary napkin 1. be. Moreover, a release sheet 10 covering the anti-slip adhesive layer 9 provided on the sanitary napkin 1 is provided in a state of being fixed to the individual packaging sheet 11 .

[Basic configuration of sanitary napkin 1]
The sanitary napkin 1 is a so-called daytime sanitary napkin in which the bodily fluid discharge portion of the wearer is located in the longitudinal center. As shown in FIGS. 1 and 2, the sanitary napkin 1 has an absorbent body 4 or a covering material between a liquid-impermeable backsheet 2 and a liquid-permeable topsheet 3 as shown in FIGS. It has a structure in which an absorbent body 4 surrounded by a wrapping sheet 5 is interposed, and side nonwoven fabrics 7, 7 are provided on both sides of the skin-contacting side.

As the liquid-impermeable backsheet 2, a sheet material having at least water impermeability such as polyethylene or polypropylene is used. (In this case, the waterproof film and the nonwoven fabric form a liquid-impermeable backsheet.) can be used. In recent years, from the viewpoint of preventing stuffiness, there is a tendency to preferably use those having moisture permeability. The water-impervious/moisture-permeable sheet material is produced by melting and kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet uniaxially or biaxially. A sheet is preferably used.

Next, for the liquid-permeable surface sheet 3, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. Examples of the material fibers that make up the nonwoven fabric include synthetic fibers such as olefin-based, polyester-based, and polyamide-based fibers such as polyethylene or polypropylene, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is superior in flexibility and drapeability, and the thermal bond method is superior in bulkiness and compression recovery.

The absorbent body 4 interposed between the liquid-impermeable backsheet 2 and the liquid-permeable topsheet 3 is made of, for example, fluff pulp and water-absorbent polymer. The water-absorbing polymer is mixed in the pulp constituting the absorbent body, for example, as granular powder. Examples of the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp with a longer fiber length is more functional and functional than hardwood pulp. It is preferably used in terms of price. When the wrapping sheet 5 surrounding the absorbent body 4 is provided as in this example, the wrapping sheet 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The wrapping sheet 5, which is made of crepe paper or the like and has excellent absorbency, quickly diffuses bodily fluids and prevents backflow of menstrual blood and the like.

Synthetic fibers may also be mixed in the absorber 4 . As the synthetic fibers, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. A mixture may also be used. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, and split type fibers having a high-melting-point fiber as a core and a low-melting-point fiber as a sheath can also be used. In the case of hydrophobic fibers, the synthetic fibers are preferably surface-treated with a hydrophilizing agent so as to have affinity for body fluids.

Examples of the superabsorbent resin include a crosslinked polyacrylate, a self-crosslinked polyacrylate, a saponified product of a crosslinked acrylic acid ester-vinyl acetate copolymer, a crosslinked isobutylene/maleic anhydride copolymer, Polysulfonate cross-linked products, and products obtained by partially cross-linking water-swellable polymers such as polyethylene oxide and polyacrylamide are exemplified. Of these, acrylic acid or acrylate-based agents are preferred because of their excellent water absorption and water absorption rate. It is possible to adjust the water absorbing power and the water absorbing rate by adjusting the crosslink density and the crosslink density gradient in the production process of the superabsorbent resin having the water absorbing performance. It is desirable that the content of the superabsorbent resin is 10 to 60% of the weight of the absorbent body. If the superabsorbent resin content is less than 10%, sufficient absorption capacity cannot be provided, and if it exceeds 60%, the entanglement between pulp fibers is lost, the sheet strength is reduced, tearing and cracking, etc. becomes more likely to occur.

As the wrapping sheet 5, a paper material such as tissue or a liquid-permeable sheet material such as non-woven fabric can be used. In particular, it is preferable to use a nonwoven fabric that is less likely to break (tear). Such non-woven fabrics include non-woven fabrics processed by the spunbond method or SMS method, which have an excellent balance between thinness and strength, and elastic fibers made of thermoplastic elastomer resins that are directly connected to the spinning process such as the spunbond method or the meltblown method. A nonwoven fabric processed by a method for forming a web, and a nonwoven fabric mainly composed of elastic materials such as latex, urethane, and olefin fibers are suitable. The hydrophilicity of the wrapping sheet 5 is not particularly limited as long as at least the skin-contacting surface side (surface side) of the absorbent body 4 is not water-repellent.

Side nonwoven fabrics 7, 7 are provided on both sides of the front side of the sanitary napkin 1 along the longitudinal direction and over the entire length of the sanitary napkin 1, and outer portions of the side nonwoven fabrics 7, 7 are provided. is extended laterally and the liquid-impermeable backsheet 2 is extended laterally, and the laterally extended side nonwoven fabric 7 portion and the liquid-impermeable backsheet 2 portion are heated. The side flaps are formed by bonding with a melt adhesive or the like.

As the side non-woven fabric 7, a water-repellent non-woven fabric or a hydrophilic-treated non-woven fabric can be used from the viewpoint of important functions. For example, water-repellent non-woven fabrics coated with silicon-, paraffin-, or alkylchromic chloride-based water-repellent agents, etc., if the function of preventing penetration of urine or vaginal discharge, etc., or enhancing the feel of the skin is emphasized. If the absorption of body fluids is emphasized, a method of polymerizing in the presence of a compound with a hydrophilic group, such as an oxidation product of polyethylene glycol, in the manufacturing process of synthetic fibers, or a method of polymerizing stannic chloride Hydrophilic treated non-woven fabric made by treating the surface with a metal salt such as the above, partially dissolving the surface to make it porous, and making the synthetic fiber swollen or porous by a method such as depositing metal hydroxide, and imparting hydrophilicity by applying capillary action. should be used. As the side non-woven fabric 7, it is possible to use natural fibers, synthetic fibers, regenerated fibers, or the like as a material, and those formed by an appropriate processing method can be used. A non-woven fabric is preferably used.

As shown in FIG. 2, the inner side of the side non-woven fabric 7 is folded back into a substantially double portion, and inside the double-layered sheet, both ends or the lengthwise direction are appropriately formed in the middle part in the height direction. One or more, in the illustrated example, two filamentous elastic stretchable members 8, 8 fixed in the position of are disposed, and the double sheet portion is erected on the surface side by the contractive force of the three-dimensional gathers G, G is formed.

As shown in FIG. 1, the non-skin contact surface (liquid-impermeable backsheet 2) of the main body portion in which the absorber 4 is interposed between the liquid-permeable topsheet 3 and the liquid-impermeable backsheet 2 The outer surface of the body) has a plurality of streaks in an appropriate application pattern for fixing to the underwear, in the example shown, three streaks along the longitudinal direction of the sanitary napkin 1 and at intervals in the width direction. 9, 9 . . . are formed, and these adhesive layers 9, 9 .

As the adhesive for forming the main body anti-slip adhesive layer 9, one containing, for example, a styrene-based polymer, a tackifier, or a plasticizer as a main component is preferably used. Examples of the styrene-based polymer include styrene-ethylene-butylene-styrene block copolymers, styrene-butylene-styrene block copolymers, styrene-isobutylene-styrene copolymers, and the like. It may be used or a blend of two or more polymers. Among these, styrene-ethylene-butylene-styrene block copolymers are preferred in terms of good thermal stability. As the tackifier and plasticizer, those which are solid at room temperature can be preferably used. Examples of tackifiers include C5 petroleum resins, C9 petroleum resins, dicyclopentadiene petroleum resins, and rosin petroleum resins. , polyterpene resins, terpene phenolic resins, etc. Examples of plasticizers include monomer plasticizers such as trifresyl phosphate, dibutyl phthalate, and dioctyl phthalate, and polymer plasticizers such as vinyl polymers and polyesters. be done.

As for the release sheet 10, a release treatment liquid such as silicone-based resin, fluorine-based resin, or tetrafluoroethylene-based resin is applied or spray-coated on the contact surface with respect to the adhesive layer 9 for preventing displacement of the body. Release-treated paper or plastic sheets can be used. It should be noted that the film itself or the nonwoven fabric itself may be used as long as the adhesive strength does not substantially decrease even without special release treatment.

[Individual packaging state of sanitary napkin 1]
The sanitary napkin 1 having the above-described structure is in an individually packaged state, and the adhesive layers 9, 9, . The sanitary napkin 1, the release sheet 10, and the individual packaging sheet 11 are integrally folded into three or four in the longitudinal direction, and the open side edge portions are sealed by heat sealing or the like, and the longitudinal edge portions are sealed. The unsealed part of the part is fixed by a tag tape 12. - 特許庁

As shown in FIG. 1, the individual packaging sheet 11 includes a pair of left and right longitudinal side edges extending in a direction corresponding to the longitudinal direction (front-rear direction) of the sanitary napkin 1, and a lateral direction (width direction) of the sanitary napkin 1. direction) and a pair of front and rear short side edges extending in the corresponding direction.

As the material for the individual packaging sheet 11, a plastic film, a nonwoven fabric, paper, or the like can be used. Of these, the most preferred is a plastic film as will be detailed later.

In terms of dimensions, the individual packaging sheet 11 is formed to have a lateral dimension that is wider than the main body of the sanitary napkin 1 and extends to both sides, as shown in FIG. As for the longitudinal dimension, at least one end side (the side on which the tag tape 12 is provided, that is, the side corresponding to the front side of the sanitary napkin 1) extends forward from the front end of the sanitary napkin 1, and the other side is formed. The end side (the side corresponding to the rear side of the sanitary napkin 1) is formed to extend rearward from the rear end of the sanitary napkin 1 according to the individual packaging method (Fig. 1), or the sanitary napkin 1 It is possible to adopt a form in which it is formed shorter than the rear end.

As shown in FIG. 1, the individual packaging sheet 11 and the release sheet 10 are non-peelably joined by a release sheet fixing portion 13 provided at a predetermined position. The term "non-peelable" as used herein means that the bonded state of the individual packaging sheet 11 and the release sheet 10 is not released by the tensile force when the sanitary napkin 1 is taken out when the individually packaged sanitary napkin is unsealed.

[Extensible portion 20 of individual packaging sheet 11]
In the individually packaged sanitary napkin according to the present invention, at least a part of the section of the individually packaged sheet 11 in the longitudinal direction is provided with a stretchable portion 20 that can be stretched in the longitudinal direction. The extensible portion 20 is in a contracted state in the individually packaged state as shown in FIG. 3(A). By pulling in the longitudinal direction, as shown in FIG. 3(B), it can be changed into a longitudinally stretched state (stretched state). That is, the longitudinal dimension of the individual packaging sheet 11 is elongated by the stretched state. As a result, for example, when wearing a large night napkin at bedtime and replacing it with a small daytime napkin after waking up, a new sanitary napkin 1 can be taken out and placed in the individual packaging sheet 11. Even when a used sanitary napkin larger than the sanitary napkin 1 is to be wrapped, the longitudinal extension of the extensible portion 20 ensures that a large used sanitary napkin can be wrapped. In addition, since the used sanitary napkin is wrapped in the individual packaging sheet 11, there is less opportunity to touch the used sanitary napkin, and the rolled state can be reliably maintained, which is hygienic.

Specific example embodiments of the expandable portion 20 are described in detail below.

(First form example)
As shown in FIGS. 4 and 5, the extensible portion 20A according to the first embodiment includes a bellows portion 21 in which the individual packaging sheet 11 is folded in a plurality in the longitudinal direction in at least a partial section in the longitudinal direction. is configured by providing In order to extend the extensible portion 20A in the longitudinal direction, as shown in FIG. 6, the individual packaging sheet 11 is pulled in the longitudinal direction to release the bellows portion 21 from the folded state. The extensible portion 20A is provided in a predetermined section in the longitudinal direction centering on the substantially central portion of the individual packaging sheet 11 in the longitudinal direction.

The bellows portion 21 is formed by folding the individual packaging sheet 11 over the entire length in the width direction at a plurality of locations spaced apart in the longitudinal direction. As shown in FIG. 5, in each folding portion, the individual packaging sheet 11 extending from one side in the longitudinal direction to the other side is folded back at the other side in the longitudinal direction toward the surface on which the release sheet 10 is arranged. A first folded portion 21a is formed, and a second folded portion 21b is formed by folding back the individual packaging sheet 11 extending to one side in the longitudinal direction to the side on which the release sheet 10 is arranged at one side position in the longitudinal direction. By forming, it is folded in a substantially Z-shaped cross section.

In order to maintain the folded state of the individual packaging sheet 11 at each folding portion, the bellows portion 21 may be provided with a joining portion 22 for joining the individual packaging sheets 11 near each folding portion. In the form example shown in FIG. A joining portion 22 is provided for joining the individual packaging sheets 11 stacked on the outer side (the side where the release sheet 10 is not provided) at a position near the second folded portion 21b. The joining portion 22 may be provided at a position where the vicinity of the first folded portion 21a is joined to the individual packaging sheet 11 laminated inside thereof, or may be provided at both of them. The joint portion 22 has such a joint strength that it can be released by a pulling force that pulls the individual packaging sheet 11 in the longitudinal direction by hand. The joint portion 22 may be provided over the entire length in the width direction, or may be provided partially in the width direction. The joint portion 22 can also be used as a fixing portion for wrapping a used sanitary napkin on the inner surface and/or the outer surface of the individual packaging sheet 11 in the stretched state of the extensible portion 20A.

As the material of the individual packaging sheet 11, it is preferable to use a plastic film so that the folded state of the bellows portion 21 can be easily maintained.

The release sheet 10 is provided so as to extend forward and rearward in the longitudinal direction from the extensible portion 20A (bellows portion 21). are spliced. On the other hand, the longitudinal intermediate portion including the extensible portion 20A between the front and rear release sheet fixing portions 13, 13 is not joined to the individual packaging sheet 11. As shown in FIG. If the release sheet fixing portion 13 is provided at a position overlapping the extensible portion 20A, the release sheet fixing portion 13 hinders the extension of the extensible portion 20A, which is not preferable.

Further, the release sheet 10 is formed so as to be split into two in the longitudinal direction at a position overlapping the extensible portion 20A in plan view. Thereby, when the individual packaging sheet 11 is stretched in the longitudinal direction by the extensible portion 20A, the release sheet 10 is divided into two in the longitudinal direction, and the extensible portion 20A can be stretched. Since each of the separated release sheets 10 is joined to the individual packaging sheet 11 by the release sheet fixing portion 13, it does not come off from the individual packaging sheet 11 and can be easily disposed of as waste together with the individual packaging sheet 11. can be processed.

As shown in FIG. 4, perforations 23 extending in the width direction are preferably provided along the positions where the release sheet 10 is divided. Thereby, when the individual packaging sheet 11 is pulled in the longitudinal direction, the release sheet 10 can be easily torn in the longitudinal direction along the perforations 23 .

Furthermore, in order to facilitate the separation of the release sheet 10, at the positions where the release sheet 10 is separated, i.e., at both ends of the perforation 23, recesses 24 are formed by recessing the contour lines on both sides in the longitudinal direction in the width direction. is preferably formed. By providing the perforations 23 so as to connect the bottoms of the recesses 24 formed on both sides of the release sheet 10, the recesses 24 serve as starting points for tearing the release sheet 10 along the perforations 23. This makes the release sheet 10 even easier to tear in the longitudinal direction. A plurality of recesses 24 can be provided at intervals in the longitudinal direction, and both side edges of the release sheet 10 can be formed in an uneven shape over the entire length.

The individual packaging sheet 11 and the release sheet 10 are assembled by folding the individual packaging sheet 11 in the longitudinal direction to form the bellows portion 21 , then laminating the release sheet 10 , and fixing the individual packaging by the release sheet fixing portion 13 . It is performed by bonding to the sheet 11 .

(Second form example)
As shown in FIG. 7, the extensible portion 20B according to the second embodiment is configured by using an elastic film that can be stretched in the longitudinal direction as the individual packaging sheet 11. As shown in FIG. The release sheet 10 is joined by the release sheet fixing portions 13, 13 to a predetermined position of the individual packaging sheet 11 made of such a stretchable film. By using a stretch film as the individual packaging sheet 11, the entire individual packaging sheet 11 is formed to be stretchable. Mainly, the longitudinal section between the release sheet fixing portions 13, 13 which are spaced apart in the front and rear direction acts as the extensible portion 20B which can be extended in the longitudinal direction.

In order to stretch the extensible portion 20B in the longitudinal direction, as shown in FIG. It can be achieved by stretching in the longitudinal direction.

The stretchable film is not particularly limited, and can be used without any particular limitation as long as it is a resin film that itself has a stretchable function. One or a blend of two or more thermoplastic elastomers such as elastomers can be processed into a film by extrusion molding such as a T-die method or an inflation method.

The longitudinal dimension X1 of the extensible portion 20B before stretching is preferably between 50 and 85 mm, preferably between 50 and 60 mm. This longitudinal dimension X1 before stretching is the length in the natural state with no longitudinal tensile force applied. In addition, the elongation ratio (X2/X1×100%), which is the ratio of the longitudinal length X1 of the extensible portion 20B before stretching to the longitudinal length X2 of the extensible portion 20B after stretching, is 130. ~630%, preferably 290-490%. The length X2 in the longitudinal direction after stretching is obtained by pulling a stretchable film with a width of 35 mm at 5.0 N in the longitudinal direction, assuming a state in which both ends of the individual packaging sheet 11 are held by hand and pulled in the longitudinal direction. is the length of time.

As in the first embodiment, the perforations 23 and the recesses 24 may be provided at the dividing positions of the release sheet 10 .

(Third form example)
As shown in FIGS. 9 and 10, the stretchable portion 20C according to the third embodiment has a stretchable sheet 25 stretchable in the longitudinal direction in a part of the section of the individual packaging sheet 11 in the longitudinal direction. It is arranged in a state of being joined to the individual packaging sheet 11 by the stretch sheet fixing portions 26 provided at both ends in the direction, and the stretch sheet fixing portion 26, which is a position overlapping the stretch sheet 25 in plan view, Between 26, the individual packaging sheet 11 is formed so as to be split in the longitudinal direction. The stretchable sheet 25 can be stretched in the longitudinal direction in a longitudinal section between the stretchable sheet fixing portions 26, 26 provided along the width direction at the front and rear ends. It functions as the part 20C.

In order to stretch the extensible portion 20C in the longitudinal direction, as shown in FIG. 11, the individual packaging sheet 11 is pulled in the longitudinal direction, and the extensible sheet 11 is divided into two in the longitudinal direction at a predetermined portion. At the same time, the stretchable portion 20C between the stretchable sheet fixing portions 26, 26 is stretched in the longitudinal direction.

It is preferable to provide perforations 27 extending in the width direction along the positions where the individual packaging sheet 11 is divided. Thereby, when the individual packaging sheet 11 is pulled in the longitudinal direction, the individual packaging sheet 11 can be easily split in the longitudinal direction along the perforations 27 . At both ends of the perforations 27, recesses may be formed by recessing the contour lines on both longitudinal sides of the individual packaging sheet 11 in the width direction, similar to the recesses 24 provided on the release sheet 10 described above ( not shown).

As the material of the individual packaging sheet 11, it is preferable to use a plastic film so that the perforations 27 can be easily formed.

The stretchable sheet 25 is not particularly limited, and any sheet having a stretchable function can be used without particular limitation. , Polyester-based elastomer, polyamide-based elastomer, polyurethane-based elastomer, and other thermoplastic elastomers. can.

The stretchable sheet 25 can be arranged on either the side on which the release sheet 10 is arranged or the side on which the release sheet 10 is not arranged in the plane of the individual packaging sheet 11, as shown in FIGS. , is preferably arranged on the side where the release sheet 10 is arranged. That is, the elastic sheet 25 is preferably arranged between the individual packaging sheet 11 and the release sheet 10 . By arranging it on the side on which the release sheet 10 is arranged, the elastic sheet 25 is less visible from the outside, and the appearance is improved. When the packaging sheet 11 is pulled in the longitudinal direction, the individual packaging sheet 11 can be easily divided into two.

The width dimension of the stretchable sheet 25 is arbitrary, and it may be formed to have substantially the same width as the individual packaging sheet 11. However, as shown in FIG. It is preferable to form the individual packaging sheet 11 with a width smaller than that of the individual packaging sheet 11 so that both side edge portions of the individual packaging sheet 11 to be heat-sealed in the folded state are left and arranged inside these portions. In order to ensure tensile strength in the stretched state, the stretchable sheet 25 is preferably formed with a width dimension as large as possible, preferably wider than the release sheet 10 . It should be noted that it is not preferable to form the elastic sheet 25 with such a large width as to protrude from both sides of the individual packaging sheet 11 .

The longitudinal dimension B1 of the extensible portion 20C before stretching is preferably between 50 and 85 mm, preferably between 50 and 60 mm. This longitudinal dimension B1 before stretching is the length in the natural state without any longitudinal tensile force applied. In addition, the elongation ratio (B2/B1×100%), which is the ratio of the longitudinal length B1 of the extensible portion 20C before stretching to the longitudinal length B2 of the extensible portion 20C after stretching, is 130. ~630%, preferably 290-490%. The length B2 in the longitudinal direction after being stretched is the length when the stretchable sheet 25 having a width of 35 mm is stretched in the longitudinal direction at 5.0N.

As in the first embodiment, the perforations 23 and the recesses 24 may be provided at the dividing positions of the release sheet 10 .

The release sheet 10 extends longitudinally forward and rearward from the elastic sheet 25, and is joined to the individual packaging sheet 11 by a release sheet fixing portion 13 formed in the extending portion. there is

On the other hand, the elastic sheet 25 and the release sheet 10 may or may not be joined. In the case of joining them, a joining portion can be provided at an arbitrary position. However, as shown in FIGS. It is preferable to provide joint portions 28 , 28 at front and back positions near the perforations 23 of the release sheet 10 so as to serve as starting points for splitting the release sheet 10 in the longitudinal direction along the stitches 23 . The joint portion 28 may be provided over substantially the entire length of the release sheet 10 in the width direction, as in the illustrated example, or at least it is sufficient to serve as a starting point for tearing the perforations 23 . It may be provided only at both ends and not provided at the intermediate portion. The separation distance A between the joints 28, 28 arranged before and after the perforation 23 is set smaller than the separation distance B1 between the elastic sheet fixing parts 26, 26. Specifically, it is preferably 30 to 80 mm. should be 30 to 50 mm. Arranging the separation distance A within this range makes it easier to tear the release sheet 10 along the perforations 23 . Although the joint strength of the joint portion 28 is arbitrary, it can be set to be larger than the tear strength of the perforation 23 and smaller than the tensile force when stretching the elastic sheet 25 . As a result, when the individual packaging sheet 11 is pulled in the longitudinal direction and the release sheet 10 is torn along the perforations 23 and then the stretchable sheet 25 is stretched, the bonding between the stretchable sheet 25 and the release sheet 10 is released. Therefore, the elastic sheet 25 can be evenly expanded over the entire length between the elastic sheet fixing parts 26, 26 without being affected by the joint part 28. As shown in FIG.

Next, a method of discarding a used sanitary napkin that has been worn up to that point will be described using the individually packaged sanitary napkin having the above configuration. When the used sanitary napkin is a daytime sanitary napkin, the sanitary napkin 1 is taken out because it is almost the same size as the newly taken out sanitary napkin 1 after opening the individually packaged sanitary napkin according to the present invention. The individual packaging sheet 11 is wound in the longitudinal direction so as to wrap the outer side of the used sanitary napkin rolled up in the longitudinal direction as it is, and the ends are fixed with a tag tape 12 and discarded. In addition, by rolling the outer side of the used sanitary napkin that has been rolled in the longitudinal direction with the extensible portion 20 of the individual packaging sheet 11 stretched in the longitudinal direction, the used sanitary napkin can be more reliably individualized. You may make it wrap with the packaging sheet 11. FIG.

On the other hand, when the used sanitary napkin is a sanitary napkin for night use, it is larger than the newly taken out sanitary napkin 1 after opening the individually packaged sanitary napkin according to the present invention. The sheet 11 is pulled in the longitudinal direction, and with the extensible portion 20 stretched, the sheet 11 is wound in the longitudinal direction so as to wrap the outer side of the used sanitary napkin that has been rolled up in the longitudinal direction, and the ends thereof are wrapped with the tag tape 12. Stop and discard.

In this way, in the individually packaged sanitary napkin according to the present invention, the individually packaged sheet 11 from which the new sanitary napkin 1 is taken out allows the used daytime sanitary napkin to have approximately the same size as the newly taken out sanitary napkin 1. It is easy to wrap both a used sanitary napkin and a larger used nighttime sanitary napkin so that the used sanitary napkin remains rolled and the menstrual absorption area is exposed. Besides, it is hygienic because it is surrounded by the individual packaging sheet 11, and the diffusion of odor and seepage of menstrual blood can be suppressed.

[Other form examples]
(1) In the above embodiment, the release sheet 10 covering the anti-slip adhesive layer 9 provided on the sanitary napkin 1 is joined to the individual packaging sheet 11 by the release sheet fixing portions 13, 13. However, the release sheet 10 is not joined to the individual packaging sheet 11, and the release sheet 10 is removed from the individual packaging sheet 11 together with the sanitary napkin 1 in a state in which the sanitary napkin 1 is taken out from the individual packaging sheet 11. good too. After that, the release sheet 10 is peeled off from the sanitary napkin 1, and the release sheet 10 is discarded individually. As a result, when the individual packaging sheet 11 is stretched in the longitudinal direction, it is not necessary to tear the release sheet 10 to divide it in the longitudinal direction. Moreover, it is not necessary to provide perforations 23 on the release sheet 10 .

(2) The release sheet 10 may not be provided if the contact surface of the individual packaging sheet 11 with respect to the anti-slip adhesive layer 9 is subjected to a release treatment. Since the release sheet 10 is not provided, when the individual packaging sheet 11 is stretched in the longitudinal direction, it is not necessary to tear the release sheet 10 to divide it in the longitudinal direction. When the individual packaging sheet 11 is made of a material such as a film or a non-woven fabric that does not substantially cause a decrease in the adhesive force to the anti-slip adhesive layer 9, the peeling treatment may not be performed.

DESCRIPTION OF SYMBOLS 1 -- Sanitary napkin 2 -- Liquid-impermeable back sheet 3 -- Liquid-permeable top sheet 4 -- Absorbent body 5 -- Enveloping sheet 7 -- Side nonwoven fabric 9 -- Adhesive layer for preventing body slippage 10 -- Release sheet 11 Individual packaging sheet 12 Tag tape 13 Release sheet fixing portion 20/20A/20B/20C Extensible portion 21 Accordion portion 22 Joining portion 23 Perforation 24 Recessed portion 25 Stretch sheet 26 Stretch sheet fixing portion 27 Perforation 28 Joining portion

Claims (4)

An individually packaged absorbent article comprising a vertically long absorbent article and an individually packaged sheet for individually packaging the absorbent article,
The individual packaging sheet is provided with a stretchable portion that can be stretched in the longitudinal direction in at least a partial section in the longitudinal direction, and the stretchable portion is a stretchable sheet that can be stretched in the longitudinal direction. It is arranged in a state of being joined to the individual packaging sheet by the elastic sheet fixing portions provided at both ends of the individual packaging sheet, and at a position overlapping the elastic sheet in plan view and between the elastic sheet fixing portions, the individual 1. An individually packaged absorbent article , wherein a packaging sheet is formed so as to be longitudinally divisible . The individually packaged absorbent article comprises a release sheet covering the anti-slip adhesive layer provided on the absorbent article,
The release sheet is bonded to the individual packaging sheet at a release sheet fixing portion provided on the outer side in the longitudinal direction of the extensible portion, and is positioned so as to overlap the extensible portion in plan view. 2. The individually packaged absorbent article according to claim 1, wherein the is formed so as to be longitudinally divisible. 3. The individually packed absorbent article according to claim 2 , wherein perforations extending in the width direction are provided at predetermined positions of said release sheet. 4. The individually packed absorbent article according to claim 2 or 3 , wherein recesses are formed by recessing the contour lines on both sides in the longitudinal direction of the release sheet in the width direction at positions where the release sheet is divided.

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