JP5400556B2 - Pants-type disposable diapers - Google Patents

Description

  The present invention relates to a pants-type disposable diaper such as a disposable diaper.

Conventionally, a pants having a pair of side seal portions formed by fusing both side edges of the abdominal side and both side edges of the back side, provided with a top sheet, a back sheet, and a liquid-retaining absorber. Various types of absorbent articles of the type have been proposed.
For example, in Patent Document 1, in order to improve the ease of tearing after use, a plurality of joint portions constituting the side seal portion have the narrowest minimum width joint portion at the center of the side seal portion. And the width | variety of a junction part is disclosed so that the width | variety of a junction part may become narrow toward the minimum width junction part from each of the upper end part and lower end part of a side seal part. Further, in Patent Document 2, in order to improve the ease of wearing and the difficulty of falling off, elastic members are disposed in the waist section, the side upper section, and the side lower section of the both side edges of the front body and the back body, The underpants type disposable diaper which made the expansion-contraction force the side lower part area | region> side upper part area> waist part area is disclosed.

  However, neither of Patent Documents 1 and 2 describes anything about the relationship between the elastic member such as the waist elastic member or the leg elastic member provided in the pants-type disposable diaper, and the joint part constituting the side seal part, In particular, there is no description that the elastic member has lost its elastic function by the joint.

  Further, in Patent Document 3, in order to improve the fit around the legs, the interval between the joints constituting the pair of side seal portions is widened outward toward the leg opening, and the leg elastic member is effectively stretched. A pants-type disposable diaper having an increased length is disclosed.

  However, like the pants-type disposable diaper described in Patent Document 3, if the distance between the joints is expanded outward toward the leg opening, the difficulty of slipping down cannot be improved.

JP 2008-136651 A JP 2001-178770 A Japanese Patent Laid-Open No. 11-332912

  Accordingly, an object of the present invention is to provide a pants-type disposable diaper that is less likely to slip when worn by adjusting an elastic member such as a waist elastic member or a leg elastic member provided in the pant-type disposable diaper and a joint portion. is there.

  In the present invention, a plurality of elastic members are arranged between both side edge regions of the abdominal side and the back side, and both side edges of the abdominal side and the back side are fused. A pants-type disposable diaper having a bonded portion, wherein the bonded portion is composed of an embossed portion, and the elastic function of the elastic member is lost by the embossed portion, and the ventral portion and the back The length between the joints located at both side edges of each side part is the widest at the waist opening, and is formed so as to gradually decrease from the waist opening toward the pair of leg openings. It provides diapers.

  According to the pants-type disposable diaper of the present invention, it is difficult to slip off when worn, and the usability is improved.

FIG. 1 is a perspective view of a pants-type disposable diaper according to the first embodiment of the present invention. FIG. 2 is a developed plan view of the expanded pants-type disposable diaper shown in FIG. 1 as viewed from the top sheet side. FIG. 3 is an enlarged plan view in which a main part P of the pants-type disposable diaper shown in FIG. 1 is enlarged. FIG. 5 is a developed plan view of a state in which a pants-type disposable diaper according to the second embodiment of the present invention is developed and extended.

  Hereinafter, a preferred first embodiment of the pants-type disposable diaper of the present invention will be described with reference to FIGS.

In the pants-type disposable diaper 1A of the first embodiment, a plurality of elastic members 8 are arranged between both side edge regions 6A, 6A of the abdominal side A and between both side edge regions 6B, 6B of the back side B. Further, both side edges 6a, 6a of the abdominal side A and both side edges 6b, 6b of the back side B have joints 7, 7 formed by fusing in the shape of a palm.
As shown in FIGS. 1 and 2, the pant-type disposable diaper 1 </ b> A of the first embodiment is formed symmetrically with respect to the center line CL. Accordingly, in the following description, the right side of the symmetrical part will be mainly described.

  The pants-type disposable diaper 1A of the first embodiment will be described in detail. The pants-type disposable diaper 1A of the first embodiment (hereinafter also referred to as “diaper 1A”) is liquid-permeable as shown in FIG. A substantially vertically long absorbent main body 5 having a top sheet 2, a liquid-impermeable (including water-repellent) back sheet 3, and an absorbent body 4 interposed between both sheets 2 and 3, and an absorbent main body 5 is provided on the back sheet side of the outer layer body 6 and fixedly adhered thereto. As shown in FIG. 2, the diaper 1 </ b> A has an abdominal part A, a crotch part C, and a dorsal part in the longitudinal direction (hereinafter referred to as “Y direction”. Y direction: a direction parallel to the center line CL). B. The abdominal side A of the diaper 1A is a part arranged on the abdomen side of the wearer at the time of wearing, the back side part B is a part arranged on the back side of the wearer, and the crotch part C is worn It is a site | part distribute | arranged to a person's crotch part.

  In the diaper 1A, the absorbent body 4 has an hourglass shape (see FIG. 1) in which a central portion in the longitudinal direction (Y direction) is bound inward, and the top sheet 2 and the back sheet 3 are each rectangular. As shown in FIG. 3, the absorber 4 is joined to each other at the portions extending from both end edges in the longitudinal direction (Y direction), and the width direction (hereinafter referred to as “X direction”. X direction: a center line extending in the longitudinal direction of the diaper 1A. Also in the portions extending from both end edges of the vertical direction of CL). By joining in this way, the vertically long rectangular absorbent main body 5 is formed.

  As shown in FIG. 2, the outer layer body 6 extends over the entire outer region of the absorbent main body 5, and is bound inward in the center portion in the longitudinal direction (Y direction). In the diaper 1A, the inner surfaces of both side edges 6a, 6a of the ventral side A of the outer layer body 6 and the inner surfaces of both side edges 6b, 6b of the back side B are overlapped with each other, and are fused in a palm shape. By forming the joint portions 7, a pants-type disposable diaper 1 </ b> A having a waist opening WO and a pair of leg openings LO, LO shown in FIG. 1 is formed.

  The length between the joints 7 and 7 located at both side edges 6a and 6a of the ventral side A and both side edges 6b and 6b of the back side B is the widest at the waist opening WO and from the waist opening WO. The pair of leg openings LO and LO are formed so as to gradually decrease. Here, “the length between the joint portions 7, 7” means the length in a state where the diaper 1 </ b> A is extended in the width direction (X direction), based on the diaper 1 </ b> A shown in FIG. 1. In the diaper 1 </ b> A of the first embodiment, the joint portion 7 is composed of a plurality of independent embossed portions 70. As shown in FIGS. 2 and 3, the plurality of embossed portions 70 are spaced apart in the longitudinal direction (Y direction) along the side edges 6a and 6b of the abdominal side A and the back side B, respectively. Are arranged. The embossed portion 70 of the ventral side A (hereinafter also referred to as “ventral side embossed portion 70a”) and the embossed portion 70 of the back side portion B (hereinafter also referred to as “backside embossed portion 70b”) are shown in FIG. As shown, in the same position of the diaper 1A, the same shape and size are formed so as to correspond to each other. Hereinafter, the ventral embossed portion 70a and the back embossed portion 70b will be specifically described.

  It is preferable that 8 to 20 ventral-side embossed portions 70a are arranged at predetermined intervals in the longitudinal direction (Y direction) along each side edge 6a of the outer layer body 6 in the ventral-side portion A. As shown in FIG. 1, six ventral-side embossed portions 70a of the first embodiment are arranged on one side edge portion 6a. As shown in FIGS. 2 and 3, the six ventral embossed portions 70a of the first embodiment are arranged at substantially equal intervals in the longitudinal direction (Y direction) so as not to overlap each other. As shown in FIGS. 2 and 3, the ventral-side embossed portion 70 a is formed so that the width thereof gradually increases from the waist opening WO toward the pair of leg openings LO and LO. In other words, the length between the ventral-side embossed portions 70a, 70a located on both side edges 6a, 6a in the ventral-side portion A is the widest at the waist opening WO, and a pair of leg openings LO from the waist opening WO. , LO so as to gradually decrease toward LO. As for the back-side embossed portion 70b, the length between the back-side embossed portions 70b, 70b located at both side edges 6a, 6a in the back-side portion B is the waist opening WO, similarly to the ventral-side embossed portion 70a. It is formed so as to gradually decrease from the waist opening WO toward the pair of leg openings LO and LO.

  The width of the waist opening WO in a state where the diaper 1A is extended in the width direction (X direction) is preferably 375 mm to 425 mm. The length between the ventral-side embossed portions 70a, 70a (back-side embossed portions 70b, 70b) in a state where the diaper 1A is extended in the width direction (X direction) is the length closest to the waist opening WO. Is preferably 1 mm to 9 mm, and more preferably 3 mm to 7 mm. The length between the ventral embossed portions 70a and 70a (the dorsal embossed portions 70b and 70b) in a state where the diaper 1A is extended in the width direction (X direction) is the length closest to the leg opening LO. Is preferably 1 mm to 7 mm, more preferably 3 mm to 5 mm. Here, the length between the embossed parts 70 means the shortest distance between one embossed part 70 and the other embossed part 70 arranged on both side edges 6a, 6a, 6b, 6b.

  Each of the six ventral-side embossed portions 70a and the six dorsal-side embossed portions 70b has a rectangular shape, a triangular shape, a circular shape, an elliptical shape in plan view as shown in FIGS. The shape is preferable, and from the viewpoint of improving the feeling of use, it is more preferable that the pattern emboss is provided with a character image. Specific examples of the pattern embossing include a heart shape as shown in FIGS. 2 and 3, an animal shape such as a rabbit shape, and an anime character shape. In the first embodiment, each of the six ventral-side embossed portions 70a and the six dorsal-side embossed portions 70b has a heart-shaped outer shape in plan view as shown in FIGS. As shown in FIG. 3, the apex 71 of the heart-shaped pattern is formed so as to face outward in the width direction (on the opposite side of the center line CL).

In the first embodiment, the heart-shaped pattern emboss which is the six ventral embossed portions 70a and the six dorsal embossed portions 70b has an area from the waist opening WO to a pair of leg openings LO, It is formed so as to gradually increase toward LO. Most area of the waist opening WO near the ventral embossed portion 70a (dorsal embossed portion 70b) is preferably 5mm ² ~35mm ^2, and further preferably 10 mm ² to 20 mm ^2. Here, the area of the embossed portion 70 is the area of the embossed portion, specifically, the embossed portion 70 in a plan view and a portion formed into a film by an embossing process. It shows the area of the bottom part of the embossing part.

  As shown in FIG. 2, the outer layer body 6 is formed of an outer layer sheet 61 that is the outermost surface of the pants-type disposable diaper and an inner layer sheet 62 that is disposed on the inner surface side of the outer layer sheet 61. Between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer layer body 6, as shown in FIGS. 1 and 2, between both side edge regions 6 </ b> A and 6 </ b> A of the ventral side A and both side edges of the back side B A plurality of elastic members 8 are arranged between the regions 6B and 6B. Specifically, between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer layer body 6, as shown in FIGS. 1 and 2, a waist elastic member 81, a waistline elastic member 82, and a leg elastic member are elastic members 8. 83 is disposed, and each of the side edge regions 6A, 6A, 6B, and 6B of the ventral portion A and the back portion B has a waist elastic region (waist gather), a waistline elastic region (a waistline gather), and an annular shape. A pair of leg elastic regions (leg gathers) is formed. More specifically, the waist elastic region (waist gather) includes a plurality of waist elastic members 81 intermittently outward in the longitudinal direction (Y direction) from the absorbent main body 5 as shown in FIGS. The outer layer body 6 is formed by adhering in a stretched state between both side edges 6a1, 6a1 on the ventral side A and both side edges 6b1, 6b1 on the back side B. Similarly, in the waistline elastic region (waistline gather), a plurality of waistline elastic members 82 are arranged in the longitudinal direction (Y direction) between the waist elastic member 81 and the constriction of the outer layer body 6 as shown in FIGS. And is fixed in an extended state between both side edges 6a1, 6a1 on the ventral side A of the outer layer body 6 and both side edges 6b1, 6b1 on the back side B.

  The leg elastic region (leg gather) has a plurality of leg elastic members 83 in the ventral side A, as shown in FIGS. 1 and 2, on one side edge (left side in FIG. 2) of the ventral side A. 6a1 is fixed along the constriction of one side of the ventral side A (left side in FIG. 2), passes through the crotch part C, and goes along the constriction of the other side (right side of FIG. 2) of the ventral side part A. The other side (the right side in FIG. 2) is fixed in a stretched state until reaching the side edge 6a1, and is cut at the center of the crotch part C (the part including the center line CL). Similarly, the leg elastic region (leg gather) has a plurality of leg elastic members 83 on the back side B, as shown in FIGS. 1 and 2, on one side of the back side B (left side in FIG. 2). Adhering from the side edge 6b1 along one side of the back side B (left side in FIG. 2), passing through the crotch C, and along the other side (right side in FIG. 2) of the back side B It is formed by being fixed in a stretched state until reaching the other side edge 6b1 of the part B (right side in FIG. 2), and cutting at the center part of the crotch part C.

  In the first embodiment, the plurality of elastic members 8 have the same extension stress at the time of extension. Specifically, in the first embodiment, the waist elastic member 81 and the waist elastic member 82 which are the elastic members 8 are made of the same material, have the same thickness, and have the same expansion ratio. Yes. As a material of the waist elastic member 81 and the waist elastic member 82 which are the elastic members 8, as long as it is normally used for absorbent articles, such as a disposable diaper, it can use without a restriction | limiting so that it may mention later. In the first embodiment, the elastic member 8 (waist elastic member 81 and waist elastic member 82) having a stress of 25 gf (preferably a stress in the range of 5 gf to 45 gf) when expanded to an elongation rate of 100% is obtained. It is arranged between the outer layer sheet 61 and the inner layer sheet 62 in a state of being stretched at the same stretch rate of 120% (preferably in the range of 100% to 150%). The elongation rate is the ratio of the length of the stretched portion to the natural length. For example, when a 10 cm length is stretched to 20 cm, the stretch rate is 100%.

  In the present invention, the elastic function of the elastic member 8 is lost by the embossed portion 70. In other words, in the first embodiment, the elastic members 8 positioned on both side edges 6a and 6b on the ventral side A of the outer layer body 6 and on both side edges 6b and 6b on the back side B provide the embossed portion 70. It is cut by the embossing process to be formed. More specifically, as shown in FIG. 3, the waist elastic member 81, the waist elastic member 82, and the leg elastic member 83 fixed in an extended state between the side edges 6 a 1 and 6 a 1 of the ventral side A of the outer layer body 6. Are cut by the embossing process that forms the ventral-side embossed portion 70a at both side edges 6a, 6a of the ventral-side portion A of the outer layer body 6. Similarly, the waist elastic member 81, the waist elastic member 82, and the leg elastic member 83 fixed in an extended state between both side edges 6 b 1 and 6 b 1 in the back side portion B of the outer layer body 6 are the back side of the outer layer body 6. All the side edge portions 6b, 6b in the portion B are cut by an embossing process for forming the back embossed portion 70b. In the first embodiment, as described above, the six ventral-side embossed portions 70a and the six dorsal-side embossed portions 70b are heart-shaped pattern embossed, and the area thereof is a pair of from the waist opening WO. It is formed so as to gradually increase toward the leg openings LO and LO. For this reason, the number of elastic members 8 to be cut by the embossing process for forming the ventral-side embossed portion 70a or the dorsal-side embossed portion 70b from the waist opening WO toward the pair of leg openings LO, LO increases.

  In the present invention, as described above, the elastic function of the elastic member 8 is lost by the embossed portion 70, and the side edges 6 a and 6 a of the ventral side A and the side edges 6 b and 6 b of the back side B are provided. The length between the joint portions 7 and 7 located is the largest in the waist opening WO in the extended state of the diaper 1A, and is formed so as to gradually decrease from the waist opening WO toward the pair of leg openings LO and LO. ing. In other words, in the present invention, the effective elastic length of the plurality of elastic members 8 gradually decreases from the waist opening WO toward the pair of leg openings LO, LO. In the first embodiment, the plurality of elastic members 8 (the waist elastic member 81 and the waist elastic member 82) have the same extension stress at the time of extension. Therefore, the tension of the elastic member 8 is gradually increased from the waist opening WO toward the pair of leg openings LO and LO.

The forming material of the pants-type disposable diaper 1A of the first embodiment will be described.
As the surface sheet 2, the back sheet 3, and the absorbent body 4, each can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, a hydrophilic and liquid-permeable non-woven fabric can be used as the top sheet 2, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a non-woven fabric is used as the back sheet 3. be able to. As the absorbent body 4, an absorbent body composed of absorbent polymer particles and fiber material and covered with tissue paper (not shown) can be used.

  As the outer layer sheet 61 constituting the outer layer body 6 and the inner layer sheet 62 of the back side portion B, any sheet can be used without particular limitation as long as it is normally used for absorbent articles such as disposable diapers. For example, as the outer layer sheet 51 and the inner layer sheet 52, a water-repellent nonwoven fabric or the like can be used.

  The waist elastic member 81, the waistline elastic member 82, and the leg elastic member 83 can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers. For example, a stretchable material made of natural rubber, polyurethane, urethane foam, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene-α olefin copolymer such as ethyl acrylate-ethylene, etc. Can do.

  Heat fusion, ultrasonic embossing, high frequency embossing, etc. are used for fusion of both side edges 6a, 6a of the ventral side A and both side edges 6b, 6b of the back side B. In particular, when the embossed portion 70 is a design emboss, the elastic member 8 is provided in the region of the ventral-side embossed portion 70a or the back-side embossed portion 70b after the embossing process so that the outer shape of the design emboss is not crushed. Even if the slag remains, it is preferable that the stretchability is treated so as not to be expressed by the embossing treatment.

The effect at the time of using the underpants type disposable diaper 1A of 1st Embodiment of this invention mentioned above is demonstrated.
The diaper 1A of 1st Embodiment is the junction parts 7 and 7 located in the both-sides edge part 6a, 6a of the abdominal part A, and the both-sides edge part 6b, 6b of the back | dorsal part B, as shown in FIGS. The length between them is the largest in the waist opening WO in the extended state of the diaper 1A, and is formed so as to gradually decrease from the waist opening WO toward the pair of leg openings LO, LO. The elastic function of the elastic member 8 located on both side edge portions 6a, 6a of the ventral side portion A and both side edge portions 6b, 6b of the back side portion B is lost by the embossed portion 70, and the plurality of elastic members 8 are Their effective expansion / contraction lengths gradually decrease from the waist opening WO toward the pair of leg openings LO, LO. Therefore, the diaper 1A is less likely to slip when worn, and the feeling of use is improved. In particular, in the diaper 1 </ b> A of the first embodiment, the elongation stress when the plurality of elastic members 8 (the waist elastic member 81 and the waistline elastic member 82) is the same is the same. Therefore, the tension of the elastic member 8 is gradually increased from the waist opening WO toward the pair of leg openings LO, LO, and the diaper 1A is not easily affected by abdominal circumference fluctuation or leg movement. Since the diaper 1 </ b> A can be fixed, it is difficult to slide down when worn and the feeling of use is improved.

  Moreover, in the diaper 1A of 1st Embodiment, the elongation stress at the time of the expansion | extension of the some elastic member 8 (the waist elastic member 81 and the waist elastic member 82) is the same. Therefore, when putting on the diaper 1A, since both hands can be put in from the waist opening WO of the diaper 1A and the diaper 1A can be opened with an equal force, it is easy to put on and the feeling of use is improved.

  Moreover, in the diaper 1A of 1st Embodiment, as shown in FIGS. 1-3, the junction part 7 is comprised from the some embossed part 70 independent. Therefore, the joint portion 7 of the diaper 1A is formed by dispersing the highly embossed portions 70 in the longitudinal direction (Y direction), so that the entire joint portion 7 is hard to be hard and the texture is improved. Easy to tear after use.

  In the diaper 1A of the first embodiment, as shown in FIGS. 1 to 3, the plurality of embossed portions 70 have a width (area) from the waist opening WO to a pair of leg openings LO, It is formed so as to gradually increase toward LO. Therefore, especially when the embossed portion 70 is a design emboss, the outer shape of the design emboss near the leg opening LO can be formed large, so that the design emboss can be given clearly.

Next, the underpants type disposable diaper of 2nd Embodiment of this invention is demonstrated based on FIG.
About the underpants type disposable diaper 1B of 2nd Embodiment (henceforth "diaper 1B"), a different point from the underpants type disposable diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated in particular is the same as that of the pants-type disposable diaper 1A of the first embodiment, and the description of the pants-type disposable diaper 1A of the first embodiment is applied as appropriate.

  As shown in FIG. 4, the diaper 1 </ b> B of the second embodiment has seven ventral embossed portions 70 a and seven dorsal embossed portions 70 b, and each embossed portion has the same width and area. is there. The seven ventral embossed portions 70a and the seven dorsal embossed portions 70b are arranged so as to be gradually inclined toward the center line CL from the waist opening WO toward the pair of leg openings LO and LO. ing. By arranging in this way, the length between the ventral-side embossed portions 70a, 70a located on both side edges 6a, 6a in the ventral-side portion A is the widest in the waist opening WO, and a pair from the waist opening WO. The leg openings LO and LO are formed so as to gradually decrease. The same applies to the back embossed portion 70b.

  In the diaper 1B of the second embodiment, the plurality of elastic members 8 are formed such that the extension stress at the time of extension gradually increases from the waist opening WO toward the pair of leg openings LO, LO. Yes. More specifically, in the second embodiment, the thickness and expansion ratio of the waist elastic member 82 that is the elastic member 8 are adjusted, and the expansion stress at the time of expansion is determined when the waist elastic member 81 that is the elastic member 8 is expanded. It is set higher than the elongation stress. The plurality of waist elastic members 82 are further adjusted in thickness and expansion ratio so that the elongation stress at the time of expansion gradually increases from the waist opening WO side toward the pair of leg openings LO and LO. Is formed. In the second embodiment, the elastic waist member 81 having a stress of 25 gf (preferably a stress in the range of 5 gf to 45 gf) when stretched to 100% is used as the waist elastic member 81 with a stretch rate of 120% (100% to 150%). It is preferable to be in the range of 2), and is arranged between the outer layer sheet 61 and the inner layer sheet 62 in a stretched state. In the second embodiment, the waist elastic member 82 having a stress of 10 gf (preferably a stress in the range of 5 gf to 15 gf) when stretched to a stretch rate of 100% is stretched to a stretch rate of 120% (100% to 100%). 150%), the outer layer sheet 61 and the inner layer sheet 62 are arranged closest to the waist opening WO between the outer layer sheet 61 and the inner layer sheet 62, and the stress when expanded to 100% is 20 gf ( The outer-layer sheet 61 and the inner-layer sheet are stretched at a stretch rate of 120% (preferably in the range of 100% to 150%). 62 is arranged closest to the leg opening LO. The leg elastic member 83 is the same as the waist elastic member 81.

  The formation material of the pants-type disposable diaper 1B of 2nd Embodiment is demonstrated. About the diaper 1B of 2nd Embodiment, it is the same as that of the formation material of the underpants type disposable diaper 1A of 1st Embodiment.

The effect at the time of using the underpants type disposable diaper 1B of 2nd Embodiment of this invention mentioned above is demonstrated.
About the effect of the diaper 1B of 2nd Embodiment, a different point from the effect of the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A of 1st Embodiment, and description of the effect of the pants type disposable diaper 1A of 1st Embodiment is applied suitably.

  As shown in FIG. 4, the diaper 1 </ b> B of the second embodiment is configured to have the same width and area as each of the plurality of independent embossed portions 70. For this reason, the joint portion 7 of the diaper 1A is formed by dispersing the highly embossed portions 70 in the longitudinal direction (Y direction) so that the entire joint portion 7 is harder and the texture is improved. At the same time, it is easier to tear after use.

  Further, as shown in FIG. 4, the diaper 1B of the second embodiment has a pair of elastic members 8 (a waist elastic member 81 and a waist elastic member 82) that are subjected to a pair of tensile stresses from the waist opening WO. It forms so that it may increase gradually toward the said leg opening part LO and LO. Therefore, since the diaper 1A can fix the diaper 1B in the buttocks that are not easily affected by the change in the waist circumference and the movement of the legs, the diaper 1A is more difficult to slip when worn and the feeling of use is improved.

  The pants-type disposable diaper of the present invention is not limited to the pants-type disposable diapers of the first and second embodiments described above, and can be changed as appropriate. Moreover, each component in the underpants type disposable diaper of the above-mentioned 1st, 2nd embodiment can be implemented suitably combining in the range which does not impair the meaning of this invention.

  For example, in the pants-type disposable diapers 1A and 1B of the first and second embodiments described above, as shown in FIGS. 3 and 4, the joint portion 7 is composed of a plurality of independent embossed portions 70. Alternatively, it may be composed of a continuous linear embossed portion 70.

  Moreover, in the underpants type disposable diaper 1A of the above-mentioned 1st Embodiment, as shown in FIG.2, FIG.3, the abdominal side embossed part 70a and the back side embossed part 70b which are distribute | arranged to one side edge part 6a, 6b. In order to gradually increase the width from the waist opening WO toward the pair of leg openings LO, LO, the area of the pattern embossing is gradually increased, but the pattern embossing with the same area is applied to the waist opening. You may respond by increasing the number from WO toward a pair of leg opening part LO and LO. Specifically, one embossed portion 70 is arranged on one side edge 6a, 6b closest to the waist opening WO, and a pattern emboss having the same area as the embossed portion 70 is connected to the leg opening LO, The number of the embossed portions 70 is arranged in parallel in the width direction (X direction) on one side edge portion 6a, 6b closest to the leg opening portion LO. Also good.

  In addition, by combining a plurality of embosses at intervals narrower than the minimum width of one emboss, the design is made into one big emboss, while improving the strength, flexibility and ease of tearing of the joint 7 The width of the embossed portion 70 may be controlled.

1A, 1B Pants-type disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Absorbent body 6 Outer layer body 6A, 6B Side edge region 6a, 6b Side edge 6a1, 6b1 Side edge 61 Outer layer sheet 62 Inner layer sheet 7 Joint part 70 Embossed portion 70a Abdominal side embossed portion 70b Back side embossed portion 71 Vertex 8 Elastic member 81 Waist elastic member 82 Girth elastic member 83 Leg elastic member

Claims (5)

A plurality of elastic members are arranged between both side edge regions of the abdominal side and the back side, and the both side edges of the abdominal side and the back side are fused to each other. A pants-type disposable diaper having
The joined portion is composed of a plurality of independent embossed portions, and the elastic function of the elastic member is lost by the embossed portions,
The length between the joints located at both side edges of the ventral side and the back side is widest at the waist opening, and gradually decreases from the waist opening toward the pair of leg openings. Formed ,
The plurality of the embossed portions are pants-type disposable diapers formed such that their widths gradually increase from the waist opening toward the pair of leg openings . The pants-type disposable diaper according to claim 1, wherein the embossed portion has a rectangular shape, a triangular shape, a circular shape, an elliptical shape, or a design embossed shape. The embossed portion, pants type disposable diaper of claim 2 wherein a pattern embossed. A plurality of said elastic member is pant-type disposable diaper according to any one of claims 1 to 3 when their elongation tensile stress is the same. A plurality of said elastic member is according to any one of claims 1 to 3, the tensile stress at the time of their extension is formed so as to gradually increase toward the leg opening pair from the waist opening Pants-type disposable diapers.

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