JP2016187435A - Boxer-shorts type disposable diaper and absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a boxer-shorts type disposable diaper which is less prone to stuffiness in a space of the diaper from a crotch to a leg peripheral opening, alleviates a tight feeling, and also has a good appearance.SOLUTION: A boxer-shorts type disposable diaper 100 includes: an exterior body 20 including a front body part, a rear body part, a crotch part positioned between the front body part and the rear body part, and a pair of right and left leg peripheral cover parts extending from the crotch part and including a pair of right and left leg peripheral openings outwardly in a width direction of the crotch part; and an absorbent body 10 held in the crotch part inside the exterior body. A flexible rugged part 33d is arranged in an inner thigh area on an inner periphery of each of the pair of right and left leg peripheral cover parts.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a disposable diaper. Specifically, the present invention relates to a boxer pants-type disposable diaper that includes a leg-surrounding covering portion that covers a wearer's leg. Moreover, it is related with the absorbent article attached to a boxer underpants type exterior body.

  A so-called pants-type disposable diaper is generally known in which left and right end portions of a front body and a back body are joined to each other to form a waist opening and left and right leg-hole openings. In particular, shorts type ones in which left and right leg-hole openings are formed so as to follow the wearer's ridges are widespread.

  However, the shorts-type disposable diaper has a shape in which an opening around the leg is located adjacent to the crotch. Therefore, when the wearer's leg movements such as walking or sitting cause a gap between the wearer's butt and the leg opening around the diaper, body fluids such as urine collected in the crotch are removed. Easy to leak from.

  In order to further prevent body fluid leakage from the opening around the leg, a boxer pants-type disposable diaper having enhanced adhesion at the leg surrounding part is provided. This is because the length from the crotch part of the pants to the leg opening is longer than that of the shorts type, and the leg opening is positioned below the wearer's ridge. For this reason, it is hard to produce a clearance gap between a wearer's leg periphery and a diaper also by operation | movement of a wearer's leg, and the body fluid leak from a leg periphery opening part can be prevented effectively.

  The boxer underpants-type disposable diaper described in Patent Document 1 is provided with elastic elastic members arranged around the legs in a state of surrounding the left and right leg openings as a whole in a single round shape. As a result, body fluid is unlikely to leak.

  Moreover, the disposable diaper described in Patent Document 2 disposes a side absorbent body at a location facing the inner side of the thigh of the diaper wearer, and absorbs body fluid flowing out from the lower crotch along the inner side of the thigh. That is, the body fluid leakage around the legs is prevented by the absorbent body provided at the position facing the inner side of the thigh of the wearer.

Japanese Patent No. 5208965 JP 2012-100880 A

  However, since the boxer underpants type disposable diaper covers the lower crotch part below the diaper part firmly, the space from the crotch part of the diaper to the opening around the leg is likely to be muggy. In addition, there are some people who feel that the feeling of wearing is not good because the elastic members extending around the legs tightly tighten the legs, particularly the thighs.

  Moreover, like the disposable diaper described in Patent Document 2, in order to prevent the leakage of bodily fluids, if the absorbent body is disposed only on the inner side of the thigh where the bodily fluid is easily transmitted in a shorts type disposable diaper, the appearance around the diaper leg is good Absent. Moreover, since only the part of the side absorber on the inner side of the thigh is extended, the feeling of wearing is not good.

  In view of such problems, the present invention is to provide a boxer underpants type disposable diaper in which the space from the crotch part of the diaper to the opening around the leg is not easily stuffed, the feeling of tightening is eased, and the appearance is good. And

  The boxer underpants type disposable diaper of the present invention includes a front body, a back body, a crotch portion located between the front body and the back body, a pair of left and right sides extending from the crotch portion and on the outer side in the width direction of the crotch portion. A boxer pants-type disposable diaper comprising an exterior body having a pair of left and right leg circumference covering portions each having an opening around the leg and an absorbent main body held in a crotch portion inside the exterior body, A flexible concavo-convex part is provided in the inner crotch region in the inner circumference of each of the pair of leg-surrounding covering parts.

  The absorbent article of the present invention includes a front body, a back body, a crotch portion located between the front body and the back body, and a pair of left and right leg openings formed on the outside in the width direction of the crotch portion. The absorbent article is attached to a boxer pants-type exterior body that includes a pair of left and right leg covering portions that extend from the crotch part and have a pair of left and right leg openings on the outer side in the width direction of the crotch part, An absorbent body, a liquid-permeable top sheet stacked on one side of the absorber, a liquid-impermeable back sheet stacked on the other side of the absorbent body, and the top sheet on both the left and right sides of the top sheet When the absorbent article is attached to the boxer pants-type exterior body, it is provided with a pair of side sheets joined to the side sheet and a flexible uneven part formed integrally with the side sheet. Orthogonal to the longitudinal direction of the body Concerning the width direction, the concavo-convex portions extend outward in the width direction from each of the pair of side sheets, and when the absorbent article is attached to the exterior body, around the pair of left and right legs of the exterior body It is located in the inner crotch region in the inner periphery of each covering part.

Drawing 1 is a perspective view showing the boxer underwear type disposable diaper of a 1st embodiment. FIG. 2 is a development view of the boxer shorts disposable diaper of FIG. FIG. 3 is a plan view of the absorbent main body in a state in which the side sheet is developed. FIG. 4 is a perspective view of the absorbent main body in a state in which the side sheet is folded, as viewed from the back sheet side. FIG. 5 is a plan view of the absorbent main body in a state in which the extended cushion portion of the side seat is formed. FIG. 6 is a cross-sectional view of the disposable diaper of the first embodiment. 2A is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 2B is a cross-sectional view taken along the line BB in FIG. FIG. 7 is a diagram illustrating an extended cushion portion. The figure (a) is a perspective view of an extension cushion part, and the figure (b) is a fragmentary sectional view in the VIIb-VIIb line of the figure (a). FIG. 8 schematically shows a perspective view of a disposable diaper in a state worn by the wearer. FIG. 9 is a plan view showing the absorbing piece formed on the extended flap. FIG. 10 is a development view of the boxer shorts disposable diaper of the second embodiment. FIG. 11 is a cross-sectional view of the disposable diaper of the second embodiment. 10A is a cross-sectional view taken along line AA in FIG. 10, and FIG. 10B is a cross-sectional view taken along line BB in FIG.

  An embodiment of a boxer underpants type disposable diaper according to the present invention will be described in detail with reference to FIGS. 1 to 11.

  In the present embodiment, the “longitudinal direction” refers to a direction extending from the front body to the back body in the diaper outer package and the absorbent main body (absorbent article). That is, when the wearer wears the diaper or the like of the present embodiment, the wearer refers to a direction extending from the abdominal side to the crotch and extending to the back side. Further, the “width direction” refers to a direction orthogonal to the longitudinal direction in a plane. In the figure, the longitudinal direction is indicated by the Y axis, and the width direction is indicated by the X axis.

  FIG. 1 shows a perspective view of a boxer underpants type disposable diaper (hereinafter also simply referred to as “diaper”) according to the first embodiment of the present invention, as viewed from the front side. Moreover, the diaper of FIG. 1 is expand | deployed and the expanded view seen from the skin opposing surface side is shown in FIG.

  As shown in FIGS. 1 and 2, the boxer underpants type disposable diaper 100 in the present embodiment includes an absorbent main body 10 and an exterior body 20. The absorptive main body 10 is a member for absorbing and holding body fluid such as a wearer's urine. The exterior body 20 is a member for covering the absorbent main body 10 from the skin non-facing surface side and holding the absorbent main body 10 in the crotch of the wearer.

  The exterior body 20 is located between the front body 21 located on the wearer's belly side, the back body 22 located on the back side of the wearer, and between the front body 21 and the back body 22, and on the inseam of the wearer. And a crotch portion 23 to be applied. The absorbent main body 10 is arranged on the skin facing surface side of the exterior body 20 so as to extend over the front body 21 and the back body 22 around the crotch portion 23 of the exterior body 20. In addition, the exterior body 20 is a pants type, and a waist opening 26 that surrounds the waist portion of the wearer is formed by the front body 21 and the back body 22 when worn. Similarly, a pair of left and right leg openings 24 that surround the crotch portion of the wearer's legs are formed by the front body 21 and the back body 22 and the crotch part 23. The leg opening 24 and the waist opening 26 are formed by joining the front body 21 and the back body 22 with the side seal portions 21a and 22a positioned at the left and right ends in the width direction. It is what is done. As shown in FIG. 2, the exterior body 20 is provided with cutouts at both right and left ends of the crotch portion 23, and the cutouts are formed into a ring shape by overlapping the side seal portions 21a and 22a. Thus, the leg opening 24 is formed.

  As shown in FIG. 1, in the diaper 100, a leg periphery covering portion 25 that covers the thigh portion from the wearer's crotch is formed around the leg periphery opening 24. As shown in FIG. 1, the leg periphery covering portion 25 extends from the crotch portion 23 so that the leg periphery opening portion 24 is positioned below the crotch portion 23, and the leg periphery opening portion 24 is at the end thereof. Is provided. As shown in FIG. 2, the leg circumference covering portion 25 is formed by the following two. That is, the opening area of the notch forming the leg periphery opening 24 is reduced (the approximate angle α from the width direction center line P to the front body 21 and the back body 22 cut pieces is reduced), and the leg periphery This is to ensure a wide interval from the opening 24 to the absorbent body 11 of the absorbent main body 10. When the angle α is large, the leg opening 24 is greatly cut toward the left and right ends of the diaper, so that a shorts-type pant is formed.

  Moreover, the exterior body 20 has a structure in which an inner sheet 27 located on the skin facing surface side and an outer sheet 28 located on the skin non-facing surface side are stacked at least. If necessary, a plurality of other sheets may be overlapped between these sheets or outside. As a material constituting the inner sheet 27 and the outer sheet 28, for example, a woven fabric or a non-woven fabric can be used. In particular, in order to improve the touch of the exterior body 20, it is preferable to use a dry nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester as the inner sheet 27 and the outer sheet 28.

  In addition, a plurality of elastic elastic members 29 a, 29 b, and 29 c are interposed in the exterior body 20 between the inner sheet 27 and the outer sheet 28. The waist elastic member 29 a is fixed in the vicinity of the waist opening 26 in a state of extending along the width direction of the front body 21 and the back body 22. The waist elastic member 29a may be any material that stretches, such as rubber thread. As shown in FIG. 1, the waist opening 26 is held by the waist elastic member 29 a in a gathered state with respect to the stacked sheets. Accordingly, when worn, a waist gather is formed around the waist of the wearer. Further, the plurality of tammy elastic members 29b are fixed in a state of extending along the width direction at positions closer to the crotch portion 23 than the waist elastic members 29a. As shown in FIG. 1, the plurality of sheets laminated also by the tammy expansion / contraction member 29b are held in a gathered state. That is, Tammy gathers are formed around the wearer's lower abdomen. Further, the leg-surrounding expansion / contraction member 29 c is fixed in the vicinity of the leg-surrounding opening 24 so as to extend along the shape of the leg-surrounding opening 24. A gather is formed near the leg opening 24 by the leg periphery elastic member 29c.

  As described above, the absorbent main body 10 is disposed on the skin facing surface side of the exterior body 20. As shown in FIG. 2, the absorbent main body 10 is disposed at the center of the sheet forming the exterior body 20 such that the longitudinal center thereof is on the center line P. And the skin non-opposing surface side is joined to the exterior body 20 via a hot-melt adhesive agent etc. The length of the absorbent body 10 in the longitudinal direction is shorter than the length of the exterior body 20 in the longitudinal direction, and the length of the absorbent body 10 in the width direction is located on the inner side of the leg opening 24 when the diaper is completed. It is the length to do. Therefore, as shown in FIG. 1, the absorbent main body 10 is not exposed from the openings 24 and 26 of the exterior body 20 and is contained inside the exterior body 20.

  And the diaper 100 of this embodiment has the uneven | corrugated | grooved part 33d provided with the flexible unevenness | corrugation in the inner crotch area | region of the leg periphery coating | coated part 25. FIG. The uneven portion 33d has a plurality of convex portions, and the convex portions are deformed to relieve a feeling of tightening around the legs. Below, from the function, the uneven | corrugated | grooved part 33d is also called the extended cushion part 33d. The extended cushion portion 33d absorbs body fluid that leaks from the crotch through the inner crotch, prevents leakage to the leg opening 24, ensures air permeability around the leg, and suppresses stuffiness. In addition, the feeling of tightening around the wearer's leg is alleviated. Details of the uneven portion (extended cushion portion) 33d will be described later.

  FIG. 3 is a plan view showing the structure of the absorbent main body 10.

  The absorptive main body 10 includes an absorbent body 11, a liquid permeable top sheet 12, a liquid impermeable back sheet 13, and a side sheet 14 for forming a three-dimensional gather.

  FIG. 3 shows a state in which the side seat 14 is expanded, and FIG. 4 shows a state in which a part of the side seat 14 is folded. FIG. 5 shows a state in which the extended flap, which is the portion of the side sheet 14 that is not folded back, is subjected to pleat processing. 6A shows a cross-sectional structure taken along line AA shown in FIG. 2, and FIG. 6B shows a cross-sectional structure taken along line BB shown in FIG.

  The absorber 11 is disposed between the top sheet 12 and the back sheet 13, and absorbs and holds body fluid such as urine that has passed through the top sheet 12. In order to fulfill such a function, the absorbent body 11 is made of an absorbent material, and a known material having an absorbent function can be adopted as the absorbent material. Specifically, for example, fluff pulp, super absorbent polymer (SAP), or a hydrophilic sheet may be used. One of these absorbent materials may be used alone, or a plurality of these absorbent materials may be used in combination. In the present embodiment, a mixture of fluff pulp mixed with a superabsorbent polymer (SAP) is formed into a mat, and a single layer or a plurality of layers are used.

  The top sheet 12 is in direct contact with the skin of the wearer's crotch and allows body fluid such as urine to pass through the absorbent body 11. Therefore, the top sheet 12 is formed of a liquid-permeable material that is comfortable to the touch. Specifically, for example, fibers made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon may be subjected to a hydrophilic treatment and further made into a nonwoven fabric.

  The back sheet 13 is a member for preventing the liquid absorbed by the absorbent body 11 from leaking to the exterior body 20 side. Therefore, the back sheet 13 is made of a liquid impermeable material (liquid repellent material). Specifically, for example, it is a liquid-impermeable film made of polyethylene resin. Moreover, in order to ensure air permeability without leaking the liquid, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed.

  As shown in the cross-sectional view of FIG. 6, the top sheet 12 may extend to the left and right outer sides in the width direction of the absorbent body 11 and wrap around the end of the absorbent body 11. Moreover, you may enclose the absorber 11 with the top sheet 12 and the back sheet 13 by joining a part of the top sheet 12, ie, the part located in the skin non-opposing surface side, and the back sheet 13.

  In addition, as shown in FIG. 6, a liquid-permeable second sheet 15 may be provided between the top sheet 12 and the absorber 11. The second sheet 15 is a sheet-like member arranged for the purpose of diffusing the liquid that has passed through the top sheet 12. By providing the second seat 15, even when the wearer is seated or the like, the absorbent main body 10 is pressed and a sufficient space is not formed between the absorbent body 11 and the top sheet 12. Become. Since the liquid easily diffuses, it is possible to suppress a decrease in the liquid absorption rate. As the material constituting the second sheet 15, a liquid-permeable woven fabric, non-woven fabric, porous film, or the like can be used as in the case of the top sheet 12.

  In addition, a pair of side sheets 14 are overlapped over the entire longitudinal direction on both the left and right sides in the width direction on the skin facing surface side of the absorbent main body 10. The pair of side sheets 14 stand along both side edges of the absorbent body 11 to form a three-dimensional gather that prevents side leakage of body fluid. As the side sheet 14, one having water repellency and air permeability is suitable. As a specific material, for example, a nonwoven fabric sheet formed by a method such as card embossing or spunbonding can be used, and it is particularly preferable to use a nonwoven fabric sheet such as SMS or SMMS having high waterproofness and air permeability. Further, the side sheet 14 may be a woven fabric or a non-woven fabric subjected to water repellency, or a liquid permeable sheet may be used similarly to the top sheet 12 or the like.

  As shown in FIG. 6, the side sheet 14 has a laminated structure in which an inner layer 14 a positioned on the side in contact with the top sheet 12 and an outer layer 14 b positioned on the side not in contact with the top sheet 12 overlap. For example, the sheet member constituting the side seat 14 is folded back at the top of the three-dimensional gather, and the inner layer 14a is the inner one and the outer layer 14b is the outer one.

  As shown in FIG. 3, the pair of side sheets 14 is divided in the width direction into a joining region 31, a standing region 32, and an extending region 33. As shown in FIG. 6, the standing region 32, the joining region 31, and the extending region 33 are formed from the inner side in the width direction, and can be regarded as a band-like region extending along the longitudinal direction. The upright region 32 is a region constituting a three-dimensional gather. The extension region 33 is a region that constitutes a folding flap 33b that is folded back to the skin non-facing surface side of the absorbent main body 10 and an extension flap 33a that finally becomes the extension cushion portion 33d.

  As shown in FIG. 6, the joining region 31 of the side sheet 14 is joined on the skin facing surface of the top sheet 12, and the standing region 32 can be fixed by joining the joining region 31. Basically, the side sheet 14 is entirely bonded onto the skin facing surface of the opposing top sheet 12. Although illustration is omitted, when the left and right ends of the back sheet 13 extend from the left and right ends of the top sheet 12, the side sheet 14 is bonded onto the skin facing surface of the back sheet 13 in the bonding region 31. May be.

  As shown in FIG. 3, the standing region 32 is provided with joint portions 32 a on both front and rear end sides in the longitudinal direction, and a space between the joint portions 32 a is a free portion 32 b. The side sheet 14 is bonded on the skin facing surface of the top sheet 12 at the bonding portions 32a at the front and rear ends. On the other hand, in the free part 32b, the side sheet 14 is not joined on the skin facing surface of the top sheet 12. For this reason, the side sheet 14 can stand up freely away from the top sheet 12 in the free portion 32 b of the standing region 32. A three-dimensional gather is formed in the free portion 32 b of the standing region 32. The free portion 32b is preferably formed with a length extending from the crotch portion 23 to the front body 21 and the back body 22. In addition, the joining of the sheet | seat in the joining area | region 31 of the side sheet 14 mentioned above and the junction part 32a of the standing area | region 32 is performed using a well-known hot-melt-adhesive, a heat-fusion, etc., for example.

  In addition, as shown in FIG. 3, one or a plurality of three-dimensional gather elastic members 16 are fixed to the free portion 32 b in the standing region 32 of the side seat 14 along the longitudinal direction. When the three-dimensional gather expansion / contraction member 16 contracts, the free portion 32b of the standing region 32 rises in a direction in contact with the wearer's skin to form a three-dimensional gather. The three-dimensional gather serves as a leakage barrier for body fluids such as urine and prevents leakage to the outside.

  Further, the side seat 14 includes an extension region 33. The extension region 33 is a region that is located on the outer side in the width direction of the joining region 31 and is not joined to at least the skin facing surface of the top sheet 12. In particular, as shown in FIG. 3, in the state where the side sheet 14 is unfolded, the extension region 33 has other members (the absorbent body 11, the top sheet 12, the back sheet 13) that constitute the absorbent main body 10. , Any of the second sheets 15 and the like) is preferably not bonded to the skin facing surface side. For example, when the back sheet 13 extends outward in the width direction of the top sheet 12, the extension region 33 of the side sheet 14 is a region that is not joined to the skin facing surface side of the back sheet 13. Details of the shape of the extension region 33 and the width in the width direction will be described later.

  As shown in FIG. 3, in the present embodiment, the extension region 33 of the side seat 14 is located on the extension flap 33 a located in the center portion in the longitudinal direction and on both the front and rear sides in the longitudinal direction of the extension flap 33 a. And the folding flap 33b. As shown in FIG. 3, the extended flap 33a and the folded back flap 33b positioned before and after the extended flap 33a are separated by a cut 33c. In FIG. 3, the notch 33 c extends to the end in the width direction of the extension region 33, and the extension flap 33 a becomes a trapezoidal shape that narrows toward the end in the width direction of the extension region 33 due to the notch 33 c. .

  As shown in FIG. 4, the folding flap 33 b of the extension region 33 is folded back to the skin non-facing surface side of the absorbent main body 10. And as FIG.6 (b) shows, it joins by the hot-melt-adhesive etc. so that the outermost side of the absorptive main body 10 may be wrapped. Details of this will be described later. At this time, the boundary line between the joining region 31 and the extension region 33 functions as a folding line of the folding flap 33b. On the other hand, the extended flap 33a remains in a state where it is not folded back. Therefore, as shown in FIG. 4, the extended flap 33 is a portion extending toward the outer side in the width direction than the top sheet 12 of the absorbent main body 10. In particular, it is desirable that the extended flap 33a is positioned on the outer side in the width direction with respect to any other members (the absorbent body 11, the top sheet 12, the back sheet 13, the second sheet 15, etc.) constituting the absorbent main body 10. The length of the extension will be described later. Although not shown in FIG. 4, for example, the length in the width direction of the back sheet 13 is longer than the length in the width direction of the top sheet 12, and the back sheet 13 is outside the width direction of the top sheet 12. It may be extended to. In this case, the extension flap 33a extends further outward in the width direction than the back sheet 13.

  In the present embodiment, the top sheet 12 is folded back so as to face the skin non-facing surface side of the back sheet 13, and the top sheet 12 wraps around the ends of the absorber 11 and the back sheet 13. Therefore, as shown in FIG. 6B, the folded back flap 33 b is folded and fixed to the outermost side so as to overlap the skin non-facing surface side of the folded top sheet 12. Therefore, the side sheet 14 has a shape that covers the top sheet 12, the absorbent body 11, and the back sheet 13, thereby preventing side leakage and suppressing the deformation of the absorbent main body 10.

  On the other hand, as shown in FIG. 4, the extended flap 33 a protrudes in the width direction of the absorbent main body 10. In the present embodiment, the extended flap 33a is alternately subjected to a mountain fold (convex) and a valley fold (concave) substantially parallel to the longitudinal direction so that the length in the width direction is shortened. As shown in a), the extended cushion portion 33d is lined with pleats. As shown in FIG. 7B, the extended cushion portion 33d has a plurality of fold-like pleats 331 arranged. The pleats 331 may be formed by known pleating or squeezing. In the present embodiment, the folds 331 are arranged in a folded mountain shape (in a folding screen), but the present invention is not limited to this, and the top of the folds 331 may be round. Further, in the longitudinal direction of the absorbent main body 10, the pleats 331 of the extended cushion portion 33d may be continuous or discontinuous. For example, a structure in which discontinuous folded mountains are randomly formed or a plurality of irregularities having a specific shape by embossing may be provided. In any uneven shape, a space F may be formed between the pleats 311 (or between the protrusions) as indicated by a broken-line circle in FIG. Moreover, the height h of the pleat 311 is about 3.0 mm in a state before use, and is preferably 1.0 mm or more and 5.0 mm or less.

  Further, as shown in FIG. 5, the extension flap 33 a becomes an extension cushion portion 33 d when the pleat 331 is brought close thereto. In this embodiment, the length M2 of the extending cushion portion 33d in the width direction is ½ of the length M1 of the extending flap 33a in the width direction. M2 is appropriately determined depending on the thickness and material of the side sheet 14, and is preferably ½ M1 or more and ¼ M1 or less, for example. As shown in FIG. 2, the extended flap 33 a is attached to the exterior body 20 in a state where the extended cushion portion 33 d is brought close to the pleat 331 (see FIG. 2). Therefore, the extension region 33 of the side sheet 14 before bringing the pleats 311 is positioned outside the notch that becomes the leg-hole opening 24 of the exterior body 20 in the width direction. And it will be located inside the notch of exterior body 20 in the state where it became extended cushion part 33d which gathered pleat 311. Thus, the length M1 of the extended flap 33a is determined to the extent that it fits inside the exterior body 20 with the length M2 of the state in which the folds 311 are brought close.

  As shown in FIG. 2, the absorbent main body 10 in which the extended cushion portion 33 d is formed is disposed on the skin facing surface side of the exterior body 20. Specifically, the absorbent main body 10 is disposed from the front body 21 to the back body 22 with the crotch portion 23 of the exterior body 20 as the center. At this time, as described above, the extended cushion portion 33 d is disposed at a position corresponding to the leg-surrounding covering portion 25 of the exterior body 20.

  The absorptive main body 10 provided with the extended cushion part 33d is joined to the exterior body 20 by a hot melt adhesive or the like. The absorbent body 10 is bonded to the exterior body 20 by applying an adhesive to the skin non-facing surface side and fixing the entire body including the extended cushion portion 33d. However, bonding is not limited to this method, and bonding may be performed by partially applying an adhesive. If the extended cushion part 33d is joined to the leg periphery covering part 25 (particularly the part located in the inner crotch part of the pants) of the exterior body 20, when the wearer wears the pants, the extended cushion part 33d It is fixed to the thigh portion of the leg without moving up and down and without the extended cushion portion 33d being moved by the longitudinal movement of the leg after wearing.

  FIG. 8 is a perspective view showing how the boxer shorts disposable diaper 100 is worn.

  The absorbent main body 10 is applied to the inseam of the wearer by the exterior body 20. At this time, since the extended cushion part 33d is located in the leg periphery covering part 25 of the exterior body 20, it will be located in the thigh from the wearer's ridge part. Particularly, since the body fluid comes into contact with the inner crotch region, even when the body fluid leaks from the crotch through the crotch (particularly the inner crotch portion), the flow can be blocked and absorbed by the extended cushion portion 33d.

  In addition, as shown in FIG. 8, the extended cushion portion 33 d abuts the wearer's thigh (particularly the inner crotch portion) with the apex (convex) of the pleat 331 facing each other. Therefore, the extended cushion portion 33d does not come into close contact with the wearer's skin, but comes into contact with the space F shown in FIG. 7B. Depending on the thickness of the wearer's thighs, the pleats 331 may be slightly crushed and the space F may be reduced, but an appropriate gap should be secured between the wearer's skin and those without the pleats 331. Can do. Moreover, a clearance gap can be formed between the leg periphery coating | coated part 25 and the skin of the diaper 100 with the height of this pleat 331. Because of the space F and the gap, it is possible to always ensure air permeability around the wearer's leg, so that it is difficult for stuffiness around the leg to occur. In addition, the inner sheet 27 of the outer package 20 does not directly adhere to the wearer's thigh, but the deformable extended cushion portion 33d comes into contact, so that the tightening feeling is alleviated. In particular, the leg opening 24 has a feeling of tightening by the leg elastic member 29c, but the extended cushion part 33d softens the contact with the skin, reduces the feeling of tightening, and wears the pants. A feeling improves.

  As described above, the extended cushion portion 33d has a role of absorbing body fluid such as urine, and therefore preferably has more absorbability. On the other hand, the extension flap 33a before the pleats 311 are brought together is a part of the side seat 14. As described above, since the side sheet 14 constitutes a three-dimensional gather that prevents side leakage of body fluid, it is generally formed of a sheet material having water repellency. Therefore, in the present embodiment, a hydrophilic material may be applied to the extended cushion portion 33d in order to increase the absorbability. For example, a manufacturing method in which the pleats 331 are formed after applying a hydrophilic material to the extension flap 33a may be used.

  Further, as another example of providing the extended cushion portion 33d with absorbency, as shown in FIG. 9, an absorbent piece 33e made of an absorbent material is attached to the skin facing surface side of the extended flap 33a. Also mentioned. A pleat 331 forming process may be applied to the extended flap 33a to which the absorbing piece 33e is attached to form the extended cushion portion 33d. The size of the absorbing piece 33e may be smaller than the extended flap 33a, or conversely, the size of protruding the extended flap 33a. The absorbent piece 33e may be an absorbent material, and examples thereof include pulp, cellulose fiber, and fibrous absorbent polymer. In addition, tissue, an SAP sheet made of a synthetic fiber and an absorbent polymer, a foaming material such as urethane, and the like having absorptivity can be used.

  Further, when hydrophilic processing is performed on the extended cushion portion 33d, the following processing may be added in order to improve leakage prevention. That is, a leak-proof film for preventing leakage is attached to the non-skin facing surface side of the extension flap 33a, and a pleat 331 is formed on the extension flap 33a in a state where this film is attached to the extension cushion portion. 33d may be formed. Or you may affix a leak-proof film on the skin non-facing surface side of the extended cushion part 33d in which the pleat 331 was formed. By sticking the leak-proof film in this way, it is possible to ensure both the absorbency of the extended cushion portion 33d and the leak-proof property.

  Further, the extended cushion portion 33d is located in a portion that is easily slipped by the back-and-forth movement of the leg, which is an inner crotch portion. Therefore, a lotion or anti-rash drug may be applied in advance to the extended cushion portion 33d so that the extended cushion portion 33d is not touched by the skin due to the longitudinal movement of the leg. The amount thereof is set so as not to impair the absorbability of the extended cushion portion 33d.

  In addition, a deodorant and an antibacterial agent may be added or applied to the extended cushion portion 33d as necessary.

  As described above, by providing the extended cushion portion 33d, it is possible to ensure the air permeability of the crotch portion (particularly the inner crotch portion), soften the contact with the skin, reduce the feeling of tightening, and wear the pants. A feeling improves. Therefore, the size of the extended cushion portion 33d is preferably in the following range.

  As shown in FIG. 5, the length in the longitudinal direction of the absorbent main body 10 is L1, and the length in the longitudinal direction of the extended cushion portion 33d is L2. The length L2 of the extended cushion portion 33d is preferably 5% to 70%, or 10% to 40%, where the length L1 of the absorbent main body 10 is 100%. If the length L2 is less than 30%, the area covering the inner crotch portion is reduced, which may make it impossible to effectively prevent urine leakage. On the other hand, when the length L2 exceeds 85%, the extended cushion portion 33d covers not only the inner crotch portion but also a substantial portion of the outer circumference of the crotch, giving a feeling of stiffness. In addition, there is a risk of obstructing the longitudinal movement of the leg.

  As shown in FIG. 6A, the interval from the joining region 31 of the side seat 14 to the leg opening 24 is W1, and the length (lateral width) of the extending cushion portion 33d in the width direction is W2. The length (lateral width) W2 of the extending cushion portion 33d in the width direction is equal to or less than the interval W1 to the leg-hole opening 24 (W2 ≦ W1). For example, if the length W2 of the extended cushion portion 33d is longer than the interval W1, the extended cushion portion 33d protrudes from the leg opening of the pants. With such a shape, the extended cushion portion 33d that has absorbed the body fluid directly touches the wearer's clothes, which may wet the clothes. Moreover, when the extended cushion part 33d protrudes, the appearance of a diaper is bad. On the other hand, if the length W2 of the extended cushion portion 33d is too short, effects such as ensuring air permeability cannot be sufficiently exhibited. Accordingly, the length W2 of the extended cushion portion 33d is preferably 25% to 100%, or 50% to 95%, where the interval W1 from the joining region 31 of the side seat 14 to the leg opening 24 is 100%. .

  In the embodiment shown in FIGS. 1 to 9, the extension region 33 is divided into one extension cushion portion 33d (extension flap 33a) and two folding flaps 33b. 33 should just have at least 1 extension cushion part 33d (extension flap 33a). For example, the side seat 14 may be used in which the folded flap 33b is omitted and only the extended flap 33a is used. Further, the extending flap 33a is not limited to one continuous one, but may be formed by dividing into a plurality.

  Moreover, although the extension flap 33a is formed in both the inner layer 14a and the outer layer 14b of the side sheet 14, the extension flap 33a can also be formed only by the outer layer 14b. For example, the inner layer 14a may be folded back toward the skin facing surface side of the absorbent main body 10 while the extended flap 33a is formed by the outer layer 14b.

  Next, the manufacturing method of the boxer underpants type disposable diaper of this embodiment is demonstrated.

  A laminated body of the absorber 11, the top sheet 12, and the back sheet 13 is prepared. The laminated body may include a second sheet 15.

  Next, a pair of side sheets 14 are joined to both sides in the width direction of the laminate. At this time, the joining region 31 of the side sheet 14 is joined to the top sheet 12 of the laminate, and the extension region 33 positioned on the outer side in the width direction than the joining region 31 is extended from the laminate. At this stage, the three-dimensional gather elastic member 16 and the like are attached to the side seat 14. Further, the hydrophilic treatment of the extension flap 33a (rear extension cushion portion 33d) is preferably performed at this stage or after the folding flap 33b is folded, for example, on the skin facing surface side of the extension flap 33a. Apply hydrophilic material. Moreover, when attaching the absorption piece 33e or the leak-proof film to the extended flap, it may be attached at this stage.

  Next, two cuts 33 c are formed in the extension region 33 of the side sheet 14. By this cut 33c, the extension region 33 of the side seat 14 is divided into one extension flap 33a and two folding flaps 33b located on both front and rear sides thereof. When the cut 33c is formed, the absorbing piece 33e is arranged in the extended flap 33a. Moreover, when forming the notch 33c, it is preferable to use the heat cutter which cut | disconnects, melt | dissolving the sheet | seat member which forms the side sheet | seat 14. FIG. Thereby, since the periphery of the extension flap 33a is melt | fused, it becomes easy to enclose the absorption pieces 33e, such as a water absorbing fiber and SAP, inside the extension flap 33a.

  Next, in the extension region 33, the folding flap 33b is folded back toward the skin non-facing surface side of the laminate. The folded flap 33b is preferably bonded to the non-skin facing surface of the laminate with a hot melt adhesive or the like. Thereby, the absorptive main body 10 from which only the extended flap 33a protrudes is made. As described above, the extension flap 33a may be hydrophilized with only the extension flap 33a protruding.

  Next, the extended cushion 33d having a plurality of pleats is formed on the extended flap 33a by a known pleat process. The pleating process uses a known pleating process. Thereby, the absorptive main body 10 which has the extension cushion part 33d is manufactured.

  Next, the absorptive main body 10 is overlapped and fixed on the skin facing surface of the exterior body 20 manufactured by another manufacturing line. At this time, as above-mentioned, the absorptive main body 10 is arrange | positioned so that the extension cushion part 33d may be located inside the notch of the exterior body 20. FIG.

  Finally, the widthwise ends of the front body and the back body of the exterior body 20 are overlapped and joined to form a boxer pants-type disposable diaper 100. At this time, the extended cushion part 33d of the absorbent main body 10 It will be located in the surrounding coating | coated part 25. FIG.

  The fold processing of the extended flap 33a is performed after the folding flap 33b is folded back. However, the present invention is not limited to this, and the side sheet 14 that has been knitted in advance is attached to the top sheet 12, and the folding flap 33b is Alternatively, the structure may be removed without folding. That is, other extension regions (folding flaps 33b and the like) may be cut off so that only the extended cushion portion 33d that has been pleated is extended.

  Thus, since the diaper 100 of this embodiment is provided with the extended cushion part 33d located at least at the inner crotch portion, it effectively absorbs body fluid that leaks from the crotch along the inner crotch, and further leaks out. Can be blocked. In addition to the absorption and leakage effects, the gap between the skin F and the diaper 100 formed by the space F formed between the pleats 331 and the height of the pleats 331 can ensure air permeability around the legs. Further, due to the cushion effect due to the deformation of the pleats 331, tightening around the legs by the leg-around elastic members 29c and the like can be alleviated.

  In the present embodiment, the concavo-convex portion is an extended cushion portion 33 d that extends from the side seat 14. That is, although the uneven part of this embodiment is united with the absorptive main body 10, in this invention, not only this but a separate body may be sufficient. Next, a second embodiment in which the concavo-convex part is separated will be described.

  FIG. 10: is the expanded view which developed the boxer underpants type disposable diaper in 2nd Embodiment, and was seen from the skin opposing surface side. 11A is a cross-sectional view taken along the line AA in FIG. 11, and FIG. 11B is a cross-sectional view taken along the line BB in FIG.

  The concavo-convex portion of the present embodiment is not an extension from the absorbent main body 10, but is an independent cushion portion 34 formed separately from the absorbent main body 10. As can be seen from FIG. 10 and FIG. 11 (a), the independent cushion portion 34 is attached away from the absorbent main body 10. The independent cushion part 34 is a piece in which a plurality of pleats are formed in a hydrophilic material such as a hydrophilic non-woven fabric as in the first embodiment. This independent cushion part 34 is affixed to the exterior body 20, and it forms in a boxer underpants type similarly to 1st Embodiment.

  Leaks from the crotch to the inner crotch part do not occur frequently, but occur due to body orientation, leg movement, and body fluid accumulation. Therefore, when the absorbent main body 10 absorbs the body fluid, the concavo-convex part is not always wet. Therefore, if the exterior body 20 is a type in which the absorbent main body 10 is replaced and used a plurality of times, it is desirable that the concavo-convex portion is independent from the absorbent main body 10. That is, if it is independent, even if it uses the conventional absorptive main body 10 which does not have the extension cushion part 33d, the effect similar to 1st Embodiment can be acquired.

  In the present embodiment, the absorbent main body 10 may be a urine pad or the like, and may be anything that can be replaced.

  Moreover, although common to 1st Embodiment and 2nd Embodiment, the cushion part (extension cushion part 33d, the independent cushion part 34) was made into the trapezoid shape which becomes thin toward the notch | incision of the leg periphery opening part 24, but this Not only the shape but also a rectangle or the like may be used. Moreover, although arrange | positioned equally in the longitudinal direction so that a center may be located in the centerline P, not only this but the form which approached the back body side or the front body side may be sufficient. About a position, it shall adjust suitably according to the position where side leakage is easy.

  Moreover, in 1st Embodiment, it was set as the structure which attaches the absorptive main body 10 which has the extension cushion part 33d which formed several pleats beforehand to the exterior body 20, and in 2nd Embodiment, the several pleats formed beforehand are absorption. The independent cushion part 34 that is separate from the sexual main body 10 is attached to the exterior body 20. However, the invention is not limited to this, and the extended cushion part 33 d or the independent cushion part 34 is utilized by using the contraction force of the leg-surrounding elastic material 29 c. May be formed. For example, a non-woven fabric is intermittently joined in the expansion / contraction direction to the expansion / contraction part of the leg expansion / contraction material 29c that constitutes the leg opening 24, and the contraction force of the leg expansion / contraction material 29c is used to make plural pieces. You may make it form the independent cushion part 34 which has a pleat.

DESCRIPTION OF SYMBOLS 10 Absorbent main body 11 Absorber 12 Top sheet 13 Back sheet 14 Side sheet 14a Inner layer 14b Outer layer 15 Second sheet 16 Three-dimensional gather elastic member 20 Exterior body 21 Front body 22 Rear body 23 Crotch 24 Leg opening 25 Leg circumference covering part 26 Waist opening 27 Inner seat 28 Outer seat 29a Waist elastic member 29b Tammy elastic member 29c Leg elastic member 31 Joint area 32 Standing area 33 Extension area 33a Extension flap 33b Folding flap 33c Cut 33d Extension cushion part )
33e Absorption piece 331 Fold 34 Independent cushion part (uneven part)
100 disposable diapers

Claims (8)

A front body, a back body, a crotch portion positioned between the front body and the back body, and a pair of left and right leg openings on the outer side in the width direction of the crotch portion; An exterior body comprising a pair of left and right leg periphery covering portions;
A boxer shorts disposable diaper comprising an absorbent main body held in the crotch part inside the exterior body,
A boxer underpants type disposable diaper, wherein a flexible uneven portion is provided in an inner crotch region in an inner periphery of each of the pair of left and right leg covering portions.   The boxer underpants type disposable diaper according to claim 1, wherein said concavo-convex part is a plurality of pleats.   The boxer underpants type disposable diaper according to claim 2, wherein there is a gap between the plurality of pleats. The absorbent main body includes an absorbent body, a liquid-permeable top sheet stacked on one side of the absorbent body, a liquid-impermeable back sheet stacked on the other side of the absorbent body, and the top sheet. A pair of side sheets joined to the top sheet on both the left and right sides;
The boxer underpants type disposable diaper according to any one of claims 1 to 3, wherein the concavo-convex portion is formed integrally with each side sheet and extends outward in the width direction from the absorbent main body.   The boxer underpants type disposable diaper according to any one of claims 1 to 4, wherein said concavo-convex part has a hydrophilic part. A front part, a back part, a crotch part located between the front part and the back part, a pair of left and right leg openings formed on the outer side in the width direction of the crotch part, and extending from the crotch part An absorbent article attached to a boxer pants-type exterior body comprising a pair of left and right leg periphery covering portions having a pair of left and right leg periphery openings on the widthwise outer side of the crotch part,
An absorbent body, a liquid-permeable top sheet stacked on one side of the absorbent body, a liquid-impermeable back sheet stacked on the other surface side of the absorbent body, and the left and right sides of the top sheet, A pair of side sheets joined to the top sheet, and a flexible concavo-convex part formed integrally with the side sheet,
When the absorbent article is attached to the boxer underpants-type exterior body, the concave and convex portions are outward in the width direction from each of the pair of side sheets with respect to the width direction perpendicular to the longitudinal direction from the front body to the back body. And the absorbent article is located in an inner crotch region in the inner periphery of each of the pair of left and right leg covering portions of the outer package when the absorbent article is attached to the outer package. Absorbent article.   The absorbent article according to claim 6, wherein the uneven portion is a plurality of pleats.   The absorbent article according to claim 7, wherein the uneven portion has a hydrophilic portion.