TWI696454B - Disposable wearing articles - Google Patents

Abstract

The present invention provides a disposable wearing article that stably forms a pocket structure.

A wearing article having a front and back waist region, a crotch region, and an absorbent structure disposed in the crotch region, wherein the absorbent structure includes an absorbent body and side wings extending laterally outward from the absorbent body, The flanks are provided with: a distal edge extending longitudinally separated from the absorber; a branch line extending longitudinally between the absorber and the remote edge; a leak-proof side edge extending from the branch line toward the longitudinal centerline ; And the leg elastic portion extending longitudinally between the branch line and the distal edge, the leak-proof side portion and the leg elastic portion are joined at the branch line, and the leak-proof side portion has a joint separated from the branch line in the longitudinal direction The free edge of the upwardly extending leak-proof side elastic member, the leg elastic portion is divided into three sub-regions with equal widths, in each sub-region the leg elastic members are joined in the longitudinal direction, and the front and rear of the leg elastic portion The ends are respectively joined to the front and rear waist areas.

Description

Disposable wear items

The invention relates to a disposable wearing article.

In the past, disposable articles for wearing are well known. For example, Patent Document 1 discloses a disposable diaper having: an absorber; lateral wings with a plurality of elastic members for leg circumference extending outward from lateral lateral edges of the absorber; a leak-proof side, The disposable diaper is disposed along the side edge of the absorber on the side wing in a long direction, wherein the leak-proof side is a standing line between the plurality of elastic members of the leg around the side wing, by On the inner side of the rising line of the leak-proof side, one or more leg circumference elastic members are arranged to raise the leak-proof side bank of the crotch part.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 10-75976

According to the invention disclosed in Patent Document 1, by preventing leakage One or more leg elastic members are arranged inside the side standing lines, and the leak-proof side is easily erected due to the elastic contraction force of the leg elastic members, resulting in a higher weir on the leak-proof side. The capacity of the pocket structure formed on the side becomes larger to prevent leakage.

However, the disposable diaper of Patent Document 1 is intended to fit the leg circumference of the diaper to the wearer's leg, and to make the plural leg circumference elastic members provided on the side wings together with the leak-proof side Stand up. Originally, the plurality of leg elastic members provided on the side flaps are attached to the wearer's legs at different places from the leak-proof side to prevent leakage. However, in the case of Patent Document 1, as a result of the plurality of leg elastic members provided on the side wings and the leak-proof side standing up and overlapping each other, they are attached to the wearer's legs at the same place. In addition, when a plurality of leg elastic members provided on the side wings and the leakage-preventing side are erected, the leakage-preventing side becomes almost perpendicular to the absorber, and the weir formed by the leakage-preventing side becomes higher The so-called good-shaped pocket structure cannot be formed, and there is still room for improvement.

In view of the above, the subject of the present invention is to provide a method in which a plurality of leg elastic members provided on the side flaps do not overlap with the leak-proof side edges during wear, and can be used to form a pocket structure stably Disposable wearing items.

The present invention relates to a longitudinal direction and a transverse direction that are orthogonal to each other; and a skin-facing surface opposed to the wearer's skin and a non-skin-facing surface on the opposite side, and includes a front line arranged in the longitudinal direction Waist region; back waist region; and crotch region between the aforementioned front and rear waist regions, and a disposable wearing article with an absorbent structure extending from the crotch region toward the front and back waist regions.

The wearing article of the present invention is an absorbent structure provided with: an absorber extending in the longitudinal direction; and a pair of side wings extending from both side edges of the absorber toward both lateral sides, and the pair of side wings are respectively provided There are: the distal edge, which is longitudinally separated from the lateral edge of the absorber and extends in the longitudinal direction; the bifurcation line, which is the skin-facing surface between the lateral edge and the distal edge of the absorber, which extends in the longitudinal direction; The leak-proof side portion, which is branched from the branch line, extends toward the longitudinal centerline of the wearing article; and the leg elastic portion, which extends between the branch line and the distal edge in the longitudinal direction, prevents The leaky side portion and the leg elastic portion are joined to each other at the branch line. The leakproof side portion has a free edge extending from the branch line to the lateral direction and extending in the longitudinal direction. The leakproof side elastic member is located along the free edge When being stretched, the leg elastics extend in the longitudinal direction and are divided into 3 sub-regions with equal lateral dimensions. In each of the sub-regions, the leg elastic members are joined in the stretched state in the longitudinal direction. The front end portions of the leg elastic portions and the rear end portions of the leg elastic portions at the longitudinal end portions of the leg elastic portions are respectively joined to the front waist region and the back waist region. At the side wings, at the branch line and the leak-proof side elastic member At the time of contacting the branch line, the branch line elastic member is joined in the stretched state in the longitudinal direction, and the side elastic members are joined in the stretched state Closed to the lateral inner side than the branch line, the lateral elastic member extends along the longitudinal edge of the absorber in the longitudinal direction, and the free edge of the leak-proof side edge portion is located on the lateral elastic member Of the aforementioned lateral outer side.

According to the present invention, there is provided a case where a plurality of leg elastic members provided on a side wing does not overlap with a leak-proof side edge, and a disposable disposable wearing article can be formed stably in a pocket structure .

10: Diaper (disposable wearing items)

11: Front waist area

12: back waist area

13: crotch domain

14: Absorption structure

14a: front end of the absorption structure

14b: Rear end of the absorption structure

16: Front waist thin body

17: Waist thin body

25: Front waist elastic member

26: Back waist elastic member

32: Absorber

32c: Side edge of absorber

40: Wing

40a: front end of the wing

40b: the rear end of the wing

40c: Flanking distal margin

41: Divergence line

42: Leak-proof side

42c: Freedom

43: Leg elastics

43a: front end of leg elastics

43b: Rear end of leg elastics

44: bifurcated elastic member

45: Leak-proof side elastic member

46: Leg circumference elastic member

47: Lateral elastic member

49: Subregion

P: longitudinal centerline

X: landscape

Y: Portrait

The drawing shows a specific embodiment of the present invention, and is not only an indispensable structure of the invention, but also includes a selective and ideal embodiment.

FIG. 1 is a perspective view of a diaper which is an example of a disposable wearing article of the present invention.

[FIG. 2] It is a partly broken development view of the diaper of FIG. 1. [FIG.

[Fig. 3] is a schematic sectional view taken along the line III-III in Fig. 2.

[Fig. 4] is a schematic sectional view taken along the line IV-IV in Fig. 2.

[Fig. 5] A schematic cross-sectional view showing the state of the crotch region of the diaper during wearing.

FIG. 6 is a schematic cross-sectional view similar to FIG. 3 showing a modification of the diaper.

7 is the same as FIG. 3 showing another modification of the diaper Profile model diagram.

The form of the following embodiment relates to the diaper 10 shown in the attached drawing as an example of the disposable wearing article of the present invention, and not only the indispensable structure of the invention, but also includes selective and ideal constitute.

Referring to FIGS. 1 to 3, the disposable diaper 10 has: a horizontal X and a vertical Y; the horizontal X dimension of the diaper 10 is divided into two equal longitudinal center lines P extending in the vertical Y; The non-skin facing surface that is the opposite side. The diaper 10 includes a front waist region 11, a rear waist region 12, and a crotch region 13 between the front and rear waist regions 11, 12 arranged in the longitudinal direction Y, and is provided with: from the crotch region 13 toward the front and back An absorbent structure 14 extending from the waist regions 11 and 12. The front waist region 11 and the back waist region 12 include a front waist sheet 16 and a back waist sheet 17, respectively. The crotch region 13 includes an absorption structure 14, and the front and rear ends 14a, 14b of the absorption structure 14 at both ends in the longitudinal direction Y are joined to the front and rear waist sheets 16, 17, respectively, that is, to the front Waist circumference 11 and back waist circumference 12.

The front waist sheet 16 has a substantially rectangular shape, and has an inner edge 16a and an outer edge 16b extending parallel to each other in the lateral direction X, and two outer edges 16c extending parallel to each other in the longitudinal direction Y. The back waist sheet 17 has a substantially trapezoidal shape and has: a middle inner end edge 17a extending in the lateral direction X; an outer end edge extending parallel to the middle inner end edge 17a toward the transverse direction X 17b; two outer edges 17c extending toward the longitudinal direction Y between the inner and outer end edges 17a, 17b; and two inner edges 17c connected to the middle inner end edge 17a and extending obliquely with respect to the longitudinal centerline P.

The two side edges 16c of the front waist sheet 16 and the two side edges 17c of the back waist sheet 17 are superimposed on each other and connected by a side seam 20 extending intermittently in the longitudinal direction Y to form a waist opening 18 and Pair of leg openings 19. At the side seam 20, the laminated sheets are thermally fused to each other by embossing caused by heating or ultrasound.

Referring to FIG. 2, the front and rear waist sheets 16 and 17 respectively include inner layer sheets 21 and 22 on the side facing the skin, and outer layer sheets 23 and 24 on the side not facing the skin. In addition, the front and rear waist elastic members 25 and 26 formed of a plurality of linear elastic materials are mounted on the front and rear waist sheets 16 and 17 by a hot-melt adhesive in a state where they are extended in the lateral direction X Between the inner layer sheets 21, 22 and the outer layer sheets 23, 24.

The inner layer sheets 21, 22 and the outer layer sheets 23, 24 can be joined by applying a hot-melt adhesive between the inner layer sheets 21, 22 and the outer layer sheets 23, 24. In addition, the inner layer sheets 21 and 22 and the outer layer sheets 23 and 24 may be joined by a hot-melt adhesive applied to the outer peripheries of the front and rear waist elastic members 25 and 26. The inner layer sheets 21 and 22 may be formed of only one sheet material, or may be formed of a plurality of sheet materials. The front and rear waist elastic members 25 and 26 are stretchable nonwoven fabrics or linear elastic materials having a fineness of about 300 to 940 dtex, and can be used until the elongation ratio becomes about 1.5 to 3.0 times.

The absorption structure 14 has a vertically long rectangular shape and has: a front end portion 14a joined to the skin facing surface of the front waist sheet body 16; and a rear end portion joined to the skin facing surface of the back waist sheet body 17 14b; and extending in the longitudinal direction Y between the front and rear end portions 14a, 14b, located at the middle portion 14c of the crotch region 13. 2 and 3, the absorption structure 14 includes: a top sheet 30 opposed to the skin of the wearer during use; and a back sheet 31 disposed on the non-skin-facing side of the top sheet 30 The absorber 32 interposed between the top sheet 30 and the back sheet 31; and the cover sheet 33 disposed on the non-skin-facing side of the back sheet 31. The top sheet 30, the back sheet 31, and the covering sheet 33 extend from the absorber 32 in the lateral direction X and the longitudinal direction Y.

The top sheet 30 is a liquid-permeable sheet member, and for example, a spunbonded non-woven fabric or SMS non-woven fabric that has been subjected to hydrophilization treatment with a mass per unit area of about 15 to 25 g/m ² can be used. The back sheet 31 is a liquid-impermeable sheet member, and can be formed of, for example, a plastic film or a non-woven fabric having a mass per unit area of about 10 to 25 g/m ² , which is desirably breathable. The covering sheet 33 is also a liquid-impermeable sheet member, and can be formed of, for example, a hydrophobic SMS nonwoven fabric or spunbonded nonwoven fabric having a mass per unit area of about 10 to 25 g/m ² .

The absorber 32 has front and rear edges 32a, 32b located at the front and rear waist sheets 16, 17; and two side edges 32c extending longitudinally Y between the front and rear edges 32a, 32b, and includes: A liquid-absorbent core (not shown) formed of an absorbent material such as superabsorbent polymer particles; and a liquid-permeable core-clad layer sheet such as tissue paper for covering the entire liquid-absorbent core (Not shown).

2 to 4, the absorber 32 extends in the longitudinal direction Y at the center of the absorber structure 14 in the lateral direction X. A part of each of the top sheet 30, the back sheet 31, and the covering sheet 33 extends from the side edge 32c of the absorber 32 toward both lateral sides X, and forms a pair extending symmetrically with respect to the longitudinal center line P in the longitudinal direction Y Flank 40. The front and rear end portions 14a and 14b of the absorption structure 14 include a side wing front end portion 40a and a rear end portion 40b of the side wing 40 located at both ends in the longitudinal direction Y. The wing front end portion 40a and the rear end portion 40b are the skin facing surfaces joined to the front and rear waist sheets 16, 17 respectively.

The wing 40 is provided with: a distal edge 40c corresponding to the outer edge of the wing 40 extending in the longitudinal direction Y; a skin-facing surface positioned between the lateral edge 32c and the distal edge 40c of the absorber 32 in the longitudinal direction Y The extended branch line 41; the leak-proof side portion 42 extending from the branch line 41 branching toward the longitudinal center line P; and the leg elastic portion 43 between the branch line 41 and the distal edge 40c. The leak-proof side portion 42 and the leg elastic portion 43 extend in the longitudinal direction Y. In the side flap 40, a lateral elastic member 47 extends in the longitudinal direction Y along both side edges 32c of the absorber 32, and a branch line elastic member 44 extends in the longitudinal direction Y along the branch line 41. The leak-proof side portion 42 is provided with: a free edge 42c extending in the longitudinal direction Y separated from the branch line 41; and a leak-proof side elastic member 45 extending in the longitudinal direction Y along the free edge 42c. At both ends of the leak-proof side portion 42 in the longitudinal direction Y, the leak-proof side edge front end portion 42a and the leak-proof side edge rear end portion 42b are located here, respectively. The front and rear end portions 42a, 42b of the leak-proof side are respectively joined to the front and rear waist sheets 16, 17 The opposite side of the skin. The leg elastic portion 43 is provided with a leg elastic member 46 extending in the longitudinal direction Y between the branch line 41 and the side flap distal edge 40c. At both ends of the leg elastic portion 43 in the longitudinal direction Y, the leg elastic portion front end portion 43a and the leg elastic portion rear end portion 43b are located here, respectively. The front and rear end portions 43a, 43b of the leg elastic portion are skin-facing surfaces joined to the front and rear waist sheets 16, 17 respectively. The side wing front end portion 40a is formed by a leak-proof side edge front end portion 42a and the leg elastic portion front end portion 43a, and the side wing rear end portion 40b is formed by a leakage-proof side edge rear end portion 42b and a leg elastic portion rear end portion 43b.

The leak-proof side portion 42 and the leg elastic portion 43 are formed by folding back the top sheet 30, the back sheet 31, and the covering sheet 33 included in the side flap 40. Specifically, the leg elastic portion 43 is formed by folding the covering sheet 33 included in the side flap 40 toward the longitudinal center line P (see FIGS. 3 and 4 ). The leak-proof side portion 42 is formed by overlapping the end 33a of the covering sheet 33 folded back toward the longitudinal center line P; and the back sheet 31 and the top sheet 30 folded back toward the longitudinal center line P. In the leg elastic portion 43, the covering sheets 33 overlapped between the branch line 41 and the side flap distal edge 40c are joined to each other by a hot-melt adhesive (not shown). In addition, at the leak-proof side portion 42, the covering sheet 33, the back sheet 31, and the top sheet 30 laminated between the branch line 41 and the free edge 42c are also joined to each other by a hot-melt adhesive (not shown) . As a result, the leakage prevention side portion 42 and the leg elastic portion 43 are joined to each other at the branch line 41 by the hot melt adhesive (not shown). In addition, only the hot-melt adhesive for joining the leak-proof side front and rear end portions 42a, 42b to the skin-facing surface of the side flap 40 is shown in the attached drawing.

Elasticity in the side extending along the side edge 32c of the absorber 32 The member 47 can be used by stretching one or more linear elastic materials having a fineness of about 300 to 940 dtex to an elongation ratio of about 1.5 to 3.0 times. In the present embodiment, one elastic yarn of 780 dtex is extended 2.2 times in the longitudinal direction Y and joined to the outside of the absorber 32 in the lateral direction X. When the diaper 10 is worn, the lateral elastic member 47 pulls the absorber 32 toward the waist opening 18 to prevent the absorber 32 from sliding down.

The leg elastic member 46 disposed on the leg elastic portion 43 is joined in the longitudinal direction Y in an extended state. In detail, the leg elastic portion 43 extends in the longitudinal direction Y and is divided into three sub-regions 49 having mutually equal dimensions in the lateral X direction. The leg elastic members 46 are arranged in each of the three sub-regions 49. The elastic member 46 around the leg can be used by stretching a band-like or linear elastic material to about 1.5 to 3.0 times. When using linear elastic materials, it is ideal to use elastic yarns with a fineness of about 300 to 940 dtex. In this embodiment, a plurality of elastic wires are used as the leg elastic members 46.

Of the leg elastic members 46 arranged in each of the three sub-regions 49, the ratio of the contraction force of the leg elastic members 46 arranged in the sub-region 49 adjacent to the branch line 41 is arranged adjacent to the distal edge It is desirable that the contraction force of the leg circumference elastic member 46 in the sub-region 49 of 40c is greater. In addition, it is desirable that the expansion ratios of the leg elastic members 46 disposed in the sub-regions 49 be almost the same. Thereby, the leg elastic portion 43 easily protrudes in a cylindrical shape from the leg opening 19 toward the lateral X outer side of the diaper 10. As an example, in the sub-region 49 where the leg elastic portion 43 is adjacent to the branch line 41, two 620 dtex elastic yarns can be stretched to 2.2 times the elongation ratio, and in the sub-region 49 adjacent to the distal edge 40c, 310 dtex Resilience Two yarns are stretched to an elongation ratio of 2.0 to 2.2 times, and in the sub-region 49 located between the two sub-regions 49, one elastic yarn of 620 dtex elongation ratio of 2.2 times and a 310 dtex elongation ratio of 2.0 can be placed ~2.2 times 1 elastic thread. The leg elastic member 46 is engageable inside the folding cover sheet 33. If the leg elastic member 46 is composed of a plurality of linear elastic materials, the leg elastic portion 43 has a cylindrical snake-belly structure, protrudes outward from the leg opening 19 of the paper diaper 10 toward the lateral direction X, and is easily attached to the wearer's leg. In addition, the leg elastic portion 43 sets the contraction force of the leg circumference elastic member 46 included in the sub-region 49 adjacent to the branch line 41 to the contraction force of the leg circumference elastic member 46 included in the sub-region 49 adjacent to the distal edge 40c Even larger, by this, it is possible to allow the vicinity of the divergence line 41 to surely fit on the wearer's leg, and to prevent the distal edge 40c from stimulating the wearer's skin.

The branch line elastic member 44 is located between the leg circumference elastic member 46 and the leak-proof side elastic member 45 and extends in the longitudinal direction Y at the branch line 41 adjacent to the rising base edge of the leak-proof side 42. The branch line elastic member 44 pulls the branch line 41 toward the waist opening 18 when the diaper 10 is worn to prevent the branch line 41 from sliding down. In order to prevent the leakage prevention side portion 42 from overlapping with the leg elastic portion 43, it is desirable to arrange the branch line elastic member 44 between the branch line 41 and the leakage prevention side elastic member 45 in contact with the branch line 41. This can effectively prevent the leakage prevention side portion 42 from falling down toward the leg elastic portion 43. In the present invention, the branch line elastic member 44 is not necessary and may be omitted.

In the bifurcated elastic member 44, one or more linear elastic materials with a fineness of about 300 to 940 dtex can be stretched to an extension ratio of about Use 1.5 to 3.0 times. In this embodiment, a 780 dtex elastic yarn is stretched in the longitudinal direction Y to an elongation ratio of 2.2 times, a hot-melt adhesive (not shown) is applied to the elastic yarn, and bonded to the leak-proof side portion 42 Between the covering sheet 33 and the back sheet 31 contained. As shown in FIGS. 3 to 5, in the present embodiment, the position of the branch line 41 and the position of the branch line elastic member 44 almost match in plan view. In other words, the leak-proof side portion 42 and the leg elastic portion 43 are joined via the hot-melt adhesive applied to the branch line elastic member 44. By joining the cover sheet 33 located at the boundary between the leg elastic portion 43 and the leak-proof side portion 42 with the hot-melt adhesive, and the back sheet 31 contained in the leak-proof side portion 42 as the branch line 41, this can be replaced by The branch line 41 joins the leak-proof side portion 42 and the leg elastic portion 43. At this time, the branch line elastic member 44 is arranged between the branch line 41 and the leakage prevention side elastic member 45, that is, at a position adjacent to the branch line 41, and is joined to the leakage prevention side portion 42.

The leak-proof side portion 42 is provided with a free edge 42c extending from the branch line 41 in the lateral direction X and extending in the vertical direction Y, and the leak-proof side elastic member 45 is joined along the free edge 42c in an extended state. The front and rear end portions 42 a and 42 b of the side edge portions located at both ends in the longitudinal direction Y of the side edge portion 42 are joined to the skin-facing surface of the side flap 40 by the hot-melt adhesive 50. Here, it is desirable to arrange the leak-proof side elastic members 45 included in the leak-proof side front and rear end portions 42 a and 42 b outside the lateral X of both side edges 32 c of the absorber 32. In addition, the leak-proof side elastic member 45 is preferably close to the side edge 32c of the absorber 32. For example, the separation distance between the side edge 32c of the absorber 32 and the lateral direction X of the leak-proof side elastic member 45 is set at 2 cm Ideal within. The self-expanding between the front and rear end portions 42a, 42b of the leak-proof side The edge 42c erects the absorber 32 by the shrinkage of the leakage-proof side elastic member 45 when the diaper 10 is worn. Thereby, the leakage prevention side 42 functions as a weir that prevents leakage of excrement.

In this embodiment, the leak-proof side elastic member 45 is joined to the inside of the folded-back cover sheet 33. The leak-proof side elastic member 45 can be used by stretching one or more linear elastic materials having a fineness of about 300 to 940 dtex to an elongation ratio of about 1.5 to 3.0 times. In this embodiment, two elastic yarns of 470 dtex are stretched to a stretch ratio of 2.8 times and used. However, the present invention is not limited to this. For example, two elastic threads of 310 dtex can be stretched to an elongation ratio of 2.2 times and used to implement various changes. Furthermore, in this embodiment, the front and rear end portions 42a, 42b of the leak-proof side portion 42 are joined to the front and rear waist sheets 16 with the leak-proof side portion 42 inverted toward the longitudinal center line P side. , 17. However, the present invention is not limited to this. For example, as shown in FIG. 6, the free edge 42c on which the leak-proof side elastic member 45 is arranged may be bent away from the longitudinal center line P in the direction away from the front and rear ends of the leak-proof side The portions 42a and 42b are joined to the front and rear waist sheets 16 and 17 in a state where the free edge 42c is folded. In this way, by folding the free edge 42c of the leak-proof side 42, the rigidity of the free edge 42c is increased, and the situation where the leg elastic portion 43 overlaps or crosses the leak-proof side 42 can be more effectively prevented.

At the portion from the branch line 41 of the leak-proof side portion 42 to the free edge 42c, the liquid-impermeable covering sheet 33 and the liquid-impermeable back sheet 31 are superposed. By this, the excrement that stays between the pair of leak-proof side edges 42 that stand up against the absorber 32 is prevented from seeping from the leak-proof side edges 42 Happening. In addition, the liquid-permeable top sheet 30 between the branch lines 41 of the pair of leak-proof side portions 42 is arranged on the skin-facing surface of the absorber 32 by being excreted in the pair of leak-proof The urine between the side portions 42 is quickly guided to the absorber 32 to prevent the urine from overflowing from the leak-proof side portion 42. In order to prevent the leak-proof side portion 42 from overlapping the leg elastic portion 43, the distance from the branch line 41 of the leak-proof side portion 42 to the free edge 42c is set to be the distance from the branch line 41 to the distal edge 40c of the leg elastic portion 43 The distance is almost the same or short.

Referring to FIG. 2, in a plan view of the front and rear end portions 40 a and 40 b of the side flaps joined to the front and rear waist sheets 16 and 17 of the diaper 10, the side leakage elasticity is sequentially leaked in a direction away from the longitudinal center line P of the diaper 10. The member 45, the branch line elastic member 44, and the leg elastic member 46 are located here. When wearing the diaper 10, the front and rear ends 40a, 40b of the side flaps of the front and rear waist sheets 16, 17 joined to the diaper 10 are stretched toward the wearer's waist, that is, in the lateral direction X of the diaper 10, but The leak-proof side elastic members 45 and the leg elastic members 46 to which the front and rear waist sheets 16 and 17 of the diaper 10 are joined are maintained in a positional relationship that is separated from each other in the lateral direction X.

When wearing the diaper 10, as shown in the pattern of FIG. 5, in the crotch region 13 of the diaper 10, the branch elastic member 44 located between the leak-proof side elastic member 45 and the leg elastic member 46 will be located at The branch line 41 between the leak-proof side portion 42 and the leg elastic portion 43 is pulled toward the waist opening 18. As a result, the branch line 41 is prevented from sliding down, the angle formed by the leak-proof side portion 42 and the leg elastic portion 43 is maintained, and the leak-proof side portion 42 and the leg elastic portion 43 are prevented from overlapping or crossing. Also, along both sides of the absorber 32 The side elastic member 47 where the edge 32c is arranged pulls the absorber 32 toward the waist opening 18. The leak-proof side elastic member 45 is located outside the lateral X of the side edge 32c of the absorber 32 when viewed from above, and the leg elastic portion 43 is positioned outside the lateral X of the leak-proof side elastic member 45. Therefore, as shown in FIG. 5, the leg elastic portion 43 protrudes outwardly in the lateral direction X of the diaper 10 in the crotch region 13, and extends diagonally upward from the side wing 40 from the side edge 32 c of the absorber 32 to the leg elastic portion 43. . As a result, on both sides of the absorber 32, a pocket structure 48 that is recessed outward in the lateral direction X when viewed from the inside of the diaper 10 is stably formed. Here, it is desirable that the contraction force of the leak-proof side elastic member 45 is greater than the contraction force of the leg circumference elastic member 46 included in the leg elastic portion 43. Thereby, on both sides of the absorber 32, a pocket structure 48 that is recessed toward the outside in the lateral direction X when viewed from the inside of the diaper 10 is stably formed. The excrement entering the pocket structure 48 is held between the leak-proof side portion 42 and the portion of the side flap 40 from the both side edges 32c of the absorber 32 to the leg elastic portion 43, so the diaper 10 leaks Prevent performance improvements.

When the front and rear end portions 42a, 42b of the leakage prevention side are disposed on the both side edges 32c of the absorber 32, the side wings 40 form a vertically rising shape from the side edge 32c of the absorber 32 to the leg elastic portion 43, and It is difficult to form a pocket structure 48 that is recessed toward the lateral X side when viewed from the inside of the diaper 10. Therefore, the leak-proof side elastic member 45 is preferably disposed outside the lateral edge 32c of the absorber 32 in the lateral direction X.

In addition, when viewed in plan, the front and rear waist regions 11, 12 to which the front and rear end portions 40a, 40b of the side wings are joined, as long as they extend in the lateral direction X When the waist elastic members 25, 26, the leak-proof side elastic members 45 extending in the longitudinal direction Y, the branch line elastic members 44, and the leg elastic members 46 are arranged crosswise, the elastic members interlock, and because The leaky side elastic member 45, the branch line elastic member 44, and the leg circumference elastic member 46 are surely separated in the lateral direction X and are ideal. However, as long as the elastic members are interlockable, it is not necessary to cross each other. For example, they may be separated within a range of 20 mm. In addition, when the front and rear waist regions 11 and 12 are joined to the front and rear end portions 40a and 40b of the side flaps, the front and rear waist elastic members 25 and 26 intersect the leak-proof side elastic members 45, the branch line elastic members 44, and the leg elastic members 46 It is ideal to apply hot-melt adhesive at the location. Thereby, the interlocking property of each elastic member can be improved.

In the above description, the leg elastic member 46 is a plurality of linear elastic materials. However, as illustrated in FIG. 7, instead of a linear elastic material as the leg elastic member 46, a band-shaped stretchable nonwoven fabric may be used, and one band-shaped stretchable nonwoven fabric may be joined to each of the three sub-regions 49 of the leg elastic portion 43. . At this time, the contraction force of the band-shaped stretchable nonwoven fabric contained in the sub-region 49 adjacent to the branch line 41 may be set at the leg elastic portion 43 more than the contraction force of the band-shaped stretchable nonwoven fabric included in the adjacent distal edge 40c Great. Furthermore, it is ideal to separate the strip-shaped stretchable nonwoven fabric from each other in the transverse direction X. By using a band-shaped stretchable non-woven fabric as the leg elastic member 46, it is possible to prevent the leg elastic portion 43 from overlapping or crossing the leak-proof side portion 42 during wearing, and to form a pocket structure stably.

In the above, regarding the invention of the present invention, although the three-piece disposable diaper 10 has been described as an example, it is divided into the front waist and the back waist. The bodies of the domains 11 and 12 and the inter-crotch domain 13 and the absorption structure 14 are joined to obtain the disposable wearing article of this case. In addition, the side flap 40 constituting the absorption structure 14 and the absorption body 32 may be separate members. In addition, one of the leak-proof side portions 42 and the leg elastic portions 43 included in the side wing 40 is a member different from the side wing 40 and can be joined to the side wing 40 at the branch line 41. In each of the above-mentioned embodiments, if there is no special requirement, the bonding is performed by a hot-melt adhesive, but the bonding may also be performed by hot-melting or ultrasonic welding. In addition to the materials disclosed in the specification of the present application, various well-known materials commonly used in the technical field to which the invention of the present application can be used for each constituent member constituting the wearing article.

The above-mentioned disclosure of the wearing article of the present invention can at least sort out the following items.

A disposable wearing article having: a longitudinal direction and a lateral direction; and a skin-facing surface opposed to the wearer's skin and a non-skin-facing surface on the opposite side, and including a front waistline arranged in a longitudinal direction Back waist area; and the crotch area between the front and back waist areas, and equipped with an absorbent structure extending from the crotch area to the front and rear waist areas. The disposable wearing articles are characterized by: absorption The structure includes: an absorber extending in the longitudinal direction; and a pair of side wings extending from both side edges of the absorber toward the lateral outer sides. The pair of side wings are respectively provided with: a distal edge, which is an absorber The lateral edge of the body extends from the separation to the longitudinal direction; the bifurcation line, which is the skin-facing surface between the lateral edge and the distal edge of the absorbent body, extends longitudinally; the leak-proof side edge, which is from The divergence line diverges, extending toward the longitudinal centerline of the article for wearing; and the leg elastics, which are located between the divergence line and the distal edge The leak-proof side portion and the leg elastic portion extend in the longitudinal direction, and are joined to each other at the branch line. The leak-proof side portion has a free edge extending in the longitudinal direction from the branch line to the horizontal direction, and the leak-proof side edge The elastic members are joined along the free edge in an elongated state, the leg elastic portions extend in the longitudinal direction, and are divided into three sub-regions with equal lateral dimensions. In each of the sub-regions, the leg elastic members are longitudinally The stretched state is joined, and the front end of the leg elastic part and the rear end of the leg elastic part at the longitudinal ends are joined to the front waist region and the rear waist region, respectively. Between the leak-proof side elastic members, that is, the position where the branch line is contacted, the branch line elastic member is joined in the longitudinal direction in an elongated state, and the side elastic member is connected in an extended state closer to the lateral direction than the branch line Inside, the lateral elastic member extends in the longitudinal direction along the side edge of the absorber, and the free edge of the leak-proof side edge portion is located outside the lateral direction of the lateral elastic member.

The present invention disclosed in paragraph 0037 regarding the article for wearing can include at least the following embodiments. The form of this implementation can be selected separately or combined with each other.

(1) In the aforementioned side wing, between the branch line and the leak-proof side elastic member, that is, the position where the branch line contacts the branch line, the branch line elastic member is joined in an elongated state in the longitudinal direction.

(2) In the leg elastic portion, the contraction force of the leg circumference elastic member contained in the sub-region adjacent to the branch line is greater than the contraction force of the leg circumference elastic member contained in the sub-region adjacent to the distal edge.

(3) The leak-proof side elastic members arranged on the pair of leak-proof sides are The lateral direction is located on the outside of the both side edges of the absorber.

(4) On the side flaps, the lateral elastic members are joined to the laterally inner side than the branch line in an extended state, and the lateral elastic members extend in the longitudinal direction along the side edges of the absorber.

(5) The shrinkage force of the leak-proof side elastic member is greater than that of the leg circumference elastic member.

10‧‧‧diaper (disposable wearing items)

12‧‧‧ Rear waist area

13‧‧‧ crotch

11‧‧‧ Front waist area

14‧‧‧ Absorption structure

20‧‧‧Seam

17d‧‧‧Inner edge

17‧‧‧waist thin body

42b‧‧‧ Rear end

14b‧‧‧ Rear end of the absorption structure

32b‧‧‧ Rear edge

30‧‧‧Top slice

32‧‧‧Absorber

31‧‧‧Back sheet

33‧‧‧Coated sheet

22‧‧‧Inner slice

17c‧‧‧Outer edge

17b‧‧‧Outer edge

17a‧‧‧ Middle inner edge

42‧‧‧Leakproof side

40‧‧‧flank

40b‧‧‧flank rear end

46‧‧‧Leg elastic member

43‧‧‧Leg elastic part

44‧‧‧Linear elastic member

41‧‧‧ branch line

16a‧‧‧Inner edge

16c‧‧‧Side edge

16‧‧‧Front waist sheet

16b‧‧‧Outer edge

40a‧‧‧Front tip

42a‧‧‧Front end

32a‧‧‧Front edge

14a‧‧‧Front end of absorption structure

21‧‧‧Inner sheet

25‧‧‧ Elastic waist member

23‧‧‧Outer sheet

14c‧‧‧Middle

26‧‧‧ Elastic waist member

24‧‧‧Outer sheet

43b‧‧‧Leg elastic part rear end

47‧‧‧Side elastic member

45‧‧‧Leakproof side elastic member

42c‧‧‧Freedom

32c‧‧‧Side edge of absorber

43a‧‧‧Leg elastic part front end

Claims (6)

A disposable wearing article having: a longitudinal direction and a lateral direction; and a skin-facing surface facing the wearer's skin and a non-skin-facing surface on the opposite side, and included in the front of the longitudinal arrangement Waist area; back waist area; and crotch area between the front and back waist areas, and a disposable disposable wearing article having an absorbent structure extending from the crotch area toward the front and back waist areas It is characterized in that the absorbent structure includes: an absorbent body extending in the longitudinal direction; and a pair of side wings extending from both side edges of the absorbent body toward the lateral outer sides, and the pair of side wings are respectively provided There are: a distal edge, which extends from the side edge of the absorber toward the lateral direction and extends in the longitudinal direction; a bifurcation line, which is a skin-facing surface between the side edge of the absorber and the distal edge Extending in the longitudinal direction; the leak-proof side portion, which is branched from the divergence line, extending toward the longitudinal centerline of the wearing article; and the leg elastic portion, which is located at the divergence line and the far side The margins extend in the longitudinal direction, the leak-proof side edge portion and the leg elastic portion are joined to each other at the branch line, and the leak-proof side edge portion is separated from the branch line toward the lateral direction in the longitudinal direction The free edge extending upwards, the leak-proof side elastic member The edge is joined in the stretched state, the leg elastic portion extends in the longitudinal direction, and is divided into three sub-regions with the same lateral dimensions as each other. In each of the sub-regions, the leg elastic member is in the longitudinal direction Are joined in an extended state, and the front ends of the leg elastic portions and the rear ends of the leg elastic portions of the leg elastic portions at the longitudinal ends are respectively joined to the front waist region and the rear waist region. Between the branch line and the leak-proof side elastic member, that is, the position where the branch line contacts the branch line, the branch line elastic member is joined in the elongated state in the longitudinal direction, and the side elastic member is joined in the stretched state at the branch line Further to the laterally inner side, the lateral elastic member extends along the lateral edge of the absorber in the longitudinal direction, and the free edge of the leak-proof side edge portion is located laterally outward of the lateral elastic member. The disposable wearing article as described in item 1 of the patent application range, wherein the leg elastic portion, the contraction force of the leg circumference elastic member included in the sub-region adjacent to the branch line is farther than that adjacent to the distal position The contraction force of the leg elastic member included in the sub-region of the edge is greater. The disposable wearing article as described in item 1 or item 2 of the patent application scope, wherein the leak-proof side elastic member disposed on the pair of the leak-proof side edges is positioned in the lateral direction The outer sides of the side edges of the aforementioned absorber. The disposable wearing article as described in item 1 or 2 of the patent application scope, wherein the contraction force of the leak-proof side elastic member is greater than the contraction force of the leg elastic member. A disposable wearing article as described in item 2 of the scope of the patent application, wherein, when viewed from above, the front and rear ends of the side flaps joined to the front and rear waist regions are separated from the longitudinal centerline of the wearing article The direction of the leakage prevention side elastic member, the branch line elastic member, and the leg circumference elastic member are arranged in this order. The disposable wearing article as described in item 2 of the scope of the patent application, wherein the front and rear waist elastic members are joined to the lateral direction in the extended state in the front and rear waist regions, and the front and rear waist regions joined to the front and rear ends of the side wings In a plan view of the domain, the waist elastic member intersects the leak-proof side elastic member, the branch line elastic member, and the leg elastic member.

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