TW201628578A - Disposable diaper - Google Patents

Abstract

The present invention is a disposable diaper which has, in a rear waist region, a downwardly openable pocket for holding and retaining waste matter which moves toward a waist opening side. In the disposable diaper (10), the rear waist region (14) has a pocket forming part (20) provided with the downwardly openable pocket (30) which faces in the front-back direction. The pocket forming part (20) has: bilateral fixed parts (45) which are fixed to a band-shaped region (skin contact region) (23); a pocket inner-side region (42) which extends between the bilateral fixed parts (45) and above the portion connecting to the band-shaped region (23); and a pocket outer-side region (43) which faces the pocket inner-side region (42) in the front-back direction across a fold part (33) extending in the horizontal direction (X) and extends toward a crotch region (15), said pocket outer-side region (43) being positioned on an extension of an absorbent body (85). A pocket elastic body (49) which extends in the horizontal direction (X) is disposed in the pocket inner-side region (42). The pocket outer-side region (43) has a portion which is located on the extension of bilateral edges (85c) of the absorbent body (85) and is folded in the horizontal direction (X).

Description

Disposable diapers

This invention relates to a disposable diaper.

Conventionally, disposable diapers having pockets for accommodating and retaining excrement have been known. For example, Patent Document 1 discloses a disposable diaper having a liquid absorbing structure disposed around a crotch region and a stretchable sheet which is located on the skin opposite surface in the front and rear waist regions. The front and rear end portions of the liquid-absorbent structure are traversed at the front and rear ends of the liquid-absorbent structure, and the pocket for accommodating the excrement is defined between the front and rear ends of the stretchable sheet and the liquid-absorbent structure. .

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-252303

Disposable paper of the invention disclosed in Patent Document 1 The diaper can accommodate and hold the excrement moving toward the front and rear waist regions by defining pockets in the front and rear waist regions.

However, in the wearing state of the diaper, since the stretchable sheet is stretched in conjunction with the case where the front and rear waist regions are elongated in the waistline direction, the stretchable sheet is attached to the wearer immediately after the front and rear ends of the liquid-absorbent structure. body of. Thereby, the opening of the pocket defined between the stretch sheet and the front and rear end portions is closed, and the excrement does not enter the pocket and moves on the stretch sheet to stain the back of the wearer. concern. In addition, for example, even if the accommodating pocket is formed, the shape of the pocket is deformed by the body pressure in a state in which the infant is lying on the back and lying on the side, and the opening that accommodates the excrement cannot be formed, and there is a concern that the original shape cannot be returned.

An object of the present invention is to improve the conventional diaper, and to provide a disposable diaper having a pocket that can be opened downward for storing excrement that moves to the waist opening side in the rear waist region.

In order to solve the above problems, the present invention relates to a disposable diaper which has a vertical direction and a lateral direction in a wearing state, and a front-back direction intersecting the same, and includes a skin abutting surface and an opposite side thereof. a non-skin contact surface, a front waist region, a back waist region, an underarm region located between the front and rear waist regions, and an absorbent body extending from the underarm region to the front and rear waist regions.

In the disposable diaper of the present invention, the back waist region has a band-like region which is laterally extended toward the skin abutting surface side. And a pocket forming portion that is located on the side of the non-skin contact surface, and includes a pocket that is openable downward in a direction in which the central portion of the lateral direction and the band-shaped region face each other in the front-rear direction, and the pocket forming portion Having: a fixed portion on both sides fixed to the strip-shaped region; a pocket inner region extending upward from a portion connected to the strip-shaped region between the two fixed portions; and a pocket outer region extending laterally The bent portion and the inner side of the pocket face in the front-rear direction and extend toward the crotch region, and are located on an extension line of the absorber, and a pocket elastic body extending in the lateral direction is disposed in the inner side of the pocket. The outer side of the pocket is a portion that is bent in the lateral direction at a position on an extension line of the both side edges of the absorbent body.

In the disposable diaper of the present invention, a pocket forming portion having a pocket that can be opened downward is disposed in the back waist region, and the waist pocket opening is not closed even after being stretched in the wearing state, and the disposable diaper can be allowed to be closed. The excretion of the movement of the back waist opening flows into the pocket to prevent leakage to the outside, and it is possible to prevent discomfort caused by the exudates from coming into contact with the skin, skin problems, and the like.

10‧‧‧Disposable disposable diapers

13‧‧‧ Front waist

14‧‧‧ Back waist

14b‧‧‧Opening edge of the back waist

15‧‧‧胯下域

23‧‧‧ Banded domain of the posterior lumbar region

30‧‧ ‧ pocket

32‧‧‧ pocket sides

33‧‧‧Bends

41‧‧‧The central part of the strip

41a‧‧‧The inner end of the band

42‧‧‧ pocket inner domain

43‧‧‧ Pocket outer domain

49‧‧‧ Pocket elastomer

58‧‧‧After auxiliary sheet

80‧‧‧Induction groove

85‧‧‧ absorber

85a‧‧‧The side edge of the absorber

94‧‧‧ liquid-impermeable flakes

X‧‧‧ Landscape

Y‧‧‧ portrait

Fig. 1 is a rear elevational view of the disposable diaper of the present invention.

Fig. 2 is a view of the back waist region in a non-wearing state of the diaper as seen from above.

Fig. 3 is a perspective view of a back waist region in a wearing state of the diaper.

Fig. 4 is a broken view showing a part of the diaper in a state in which each elastic body is stretched in the longitudinal direction and the lateral direction of the diaper.

Fig. 5 is an exploded perspective view of the diaper.

Fig. 6 (a) is a developed plan view of a base sheet, and (b) and (c) are views showing a folding stroke of a base sheet. (d) is a view showing a state in which the base sheet is bent.

Fig. 7 is a schematic cross-sectional view taken along line VII-VII shown in Fig. 2 .

Fig. 8 is a schematic cross-sectional view taken along line VIII-VIII shown in Fig. 1 .

Fig. 9 is a schematic cross-sectional view taken along line IX-IX shown in Fig. 3 .

FIG. 10 is a cross-sectional view similar to FIG. 8 in Modification 1. FIG.

FIG. 11 is a cross-sectional view similar to FIG. 8 in Modification 2. FIG.

FIG. 12 is a cross-sectional view similar to FIG. 3 in Modification 3. FIG.

FIG. 13 is a cross-sectional view similar to FIG. 8 in Modification 4. FIG.

The trousers 10 of the pull-on type (pants type) shown as an example of the disposable diaper of the present invention have a longitudinal direction Y; a lateral direction X; and the orthogonal thickness directions (3 dimensions) Z; and In the up and down direction in the state, and having: extending along the longitudinal direction Y, dividing the dimension of the lateral direction X into two equal longitudinal axes P; and extending along the lateral direction X, dividing the dimension of the longitudinal direction Y into two equal divisions Axis Q. In addition, in the present specification, "the overlapping of the diapers 10 in plan view" means that they overlap each other in the thickness direction Z.

1 and 4, the diaper 10 includes: an opposite surface of the skin and the opposite non-skin opposing surface; an annular elastic waist sheet 11 extending in the waist direction; and being attached to the elastic waist sheet 11 The absorbent body 12; the front waist region 13; the back waist region 14; and the underarm region 15 located between the front and rear waist regions 13, 14. The diaper 10 is symmetrical with respect to the longitudinal axis P, and the elastic waist sheet 11 is composed of a front waist sheet 17 positioned in the front waist region 13 and a back waist sheet 18 positioned in the back waist region 14. The absorbing body 12 is provided with an absorber 85 having side edges 85c extending in the longitudinal direction Y.

The front and rear waist regions 13, 14 are respectively provided with inner end edges 13a, 14a extending in the lateral direction X; the outer edges (front and rear waist edges) extending in the longitudinal direction Y and the inner end edges 13a, 14a opposite to the lateral direction X 13b, 14b; and a horizontally long rectangular shape defined by the side edges 13c, 14c extending in the longitudinal direction Y between the inner and outer end edges 13a, 13b, 14a, 14b. The side edges of the side edges 13c of the front waist region 13 and the side edges 14c of the rear waist region 14 are overlapped with each other, and the diaper 10 is formed by being joined by the side seams 19 intermittently arranged in the longitudinal direction Y. The two side edges are defined as a waist opening 21 and a pair of leg openings. The side seams 19 are formed by various known hot-melting means such as hot embossing, intaglio processing, and ultrasonic processing by well-known joining means.

<pocket>

Referring to FIGS. 1 to 3 and 8, the diaper 10 has a belt-shaped region 23 extending in the lateral direction X on the skin contact surface side on the waist opening side of the back waist region 14 and a pocket forming portion 20. Is in the horizontal X of the back waist area 14 The central portion has a pocket 30 that faces the strip-shaped region 23 in the front-rear direction in the wearing state. The band-shaped region 23 is a central portion 41 having a central portion in the lateral direction of the rear waist region 14 that faces the pocket 30 in the front-rear direction. The pocket forming portion 20 has a fixed portion 45 fixed to both sides of the strip-shaped region 23, and a pocket inner region 42 extending upward from a portion connected to the central portion 41 of the strip-shaped region 23 between the both side fixing portions 45; The outer side region 43 extends from the bent portion 33 extending in the lateral direction X and the pocket inner side region 42 toward the crotch region 15 side in the front-rear direction; and the pocket formed by the both sides of the inner and outer side regions 42, 43 Both sides of the domain 32. The central portion 41 of the band-shaped region 23 has inner and outer end portions (upper and lower end portions) 41a and 41b, and the inner bag portion 42 is connected to the inner end portion (lower end portion) 41a of the central portion 41 via the bent portion 31.

As described above, the pocket side domains 32 are formed by overlapping the side portions of the pocket inner and outer regions 42, 43 with each other, and the two side fixing portions 45 formed by the outside of the pocket side regions 32 are fixed to the strip-shaped region 23. Both sides. Since the both side fixing portions 45 extend from the side seams 19 to the inner side of the lateral direction X, the pockets 30 have an opening degree at least in the central portion of the rear waist region 14, and are not the entire area between the side seams 19. The size of the opening. The band 23 and the pocket 30 are located on the waist opening side of the rear waist region 14. Here, the "waist opening side of the back waist region 14" means a region that is equal to the line 2 in the longitudinal direction of the rear waist region 14 on the outer edge 14b side.

The band-shaped region 23 is elasticized at least in the lateral direction X by the linear or strip-shaped rear upper waist elastic body 64 which will be described later. Further, a linear or strip-shaped pocket elastic body 49 extending in the lateral direction X is disposed in the pocket inner region 42. In the present embodiment, the pocket elastic body 49 is between the fixing portions 45 on both sides. Extends to the lateral X.

Referring to Fig. 2 and Fig. 3, in the wearing state and the natural state of the diaper 10 of the present embodiment, a plurality of wrinkles 78 are formed by the pocket inner side field 42 in the lateral direction X, and the lateral direction X of the pocket inner field 42 is formed. The size is smaller than the size of the lateral X of the pocket outer field 43. Further, the pocket outer side region 43 is located at a position where the existing region of the absorber 85 of the crotch region 15 is extended to the strip-shaped region 23 side, and the pocket side regions 32 are extended at both side edges 85c of the absorber 85. The portion to the side of the strip field 23 is bent inward. The pocket side field 32 is a difference in the size of the lateral direction X of the pocket inner region 42 and the lateral direction X of the pocket outer region 43 by the contraction of the pocket elastic body 49, and the absorbent body 85 of the pocket side domain 32. The inwardly bent portion of the extended portion of the side edges 85c is formed to be folded inwardly toward the inner side of the lateral direction X (toward the longitudinal axis P).

Thus, in a state in which the pocket side regions 32 are stretchably folded, in a state in which the bent portion 31 and the pocket side regions 32 are slightly expanded, respectively, in a bird's-eye view of the diaper 10, in a belt-like domain A recess 25 (see FIG. 2) that opens upward is defined between the pocket 23 and the pocket 30. Further, the pocket 30 has a bent portion 31 that is bent toward the horizontal axis Q (downward direction); a pocket side region 32 that is bent toward the inner side in the lateral direction X; and a waist opening 21 (upward direction) The bent portion 33 is bent by the mutually different directions (3 directions), and when the strip-shaped region 23 is elongated in the waistline direction, the pocket side regions 32 stand up, and the pocket inner region 42 A three-dimensional pocket space S for accommodating and holding excrement is formed inside the pocket 30 so as to extend obliquely rearward with respect to the band-shaped region 23. The center of the pocket inner field 42 is connected The inner end portion 41a of the portion 41 is located outside the center portion of the longitudinal direction Y of the rear waist region 14 in the longitudinal direction Y. Further, in order to form the bending of the pocket side domains 32 more stably, the bending lines extending in the longitudinal direction Y may be formed in advance on the extension lines of the both side edges of the absorbent body 85 by press working and/or heat processing.

Referring to Figs. 8 and 9, the pocket inner region 42 is located obliquely with respect to the central portion 41, and this is moved further rearward, and the inclination angle α with respect to the central portion 41 becomes larger. Therefore, as the inclination angle α becomes larger, the pocket inner region 42 functions as a top surface of the pocket 30 in a state of being inverted, and the pocket 30 exhibits a pocket space in which a relatively large amount of excrement can be accommodated and held therein ( The storage space) S has a box shape.

<elastic waist sheet>

Referring to FIGS. 4 and 5, the front waist sheet 17 has a front waist sheet 50 that defines the outer shape of the front waist region 13. The front waist sheet 50 has a main body portion 52 in which the front end portion 12A of the main body 12 is disposed, and an extended portion 53 located on the outer side in the longitudinal direction Y of the main body portion. The extension portion 53 is bent toward the inner side of the longitudinal direction Y along the bending line 54 extending in the lateral direction X, and is fixed to the main body portion 52 and the distal end portion 12A of the absorption body 12. Between the main body portion 52 of the front waist sheet 50 and the extension portion 53, a plurality of linear or strip-shaped front waist elastic bodies 55 extending in the lateral direction X are retractably attached in an extended state.

A portion of the front waist elastic body 55 on the side of the crotch region 15 is disposed on the side of the crotch region 15 and is provided with a front auxiliary sheet 51 that is expandable and contractible in the lateral direction X. The front auxiliary sheet 51 is located on the opposite side of the skin and is fixed A part of the front end portion 12A and the main body portion 52 positioned on both sides thereof cover the front end portion 12A of the absorbing body 12. The front auxiliary sheet 51 is formed of a fiber nonwoven fabric formed of an elastomer fiber. Since the front auxiliary sheet 51 is formed of a stretchable fiber nonwoven fabric, this is better than the non-stretchable fiber nonwoven fabric when it is formed, and the wearing feeling is excellent.

The back waist sheet 18 has a back waist sheet 60 formed of an inner sheet 61 positioned on the opposite side of the skin and an outer sheet 62 positioned on the non-skin opposing side; and a plurality of strips extending in the lateral direction X A linear or strip-shaped rear lower waist elastic body 63 which is retractably fixed between the inner and outer sheets 61, 62 in an extended state. The back waist region 14 has a base sheet 70 that is fixed in a state in which the outer end portion of the back waist sheet 18 is bent in a zigzag shape.

<Basic sheet>

Referring to Figures 5 and 6(a), the base sheet 70 is formed by an inner end edge 70a extending from the lateral direction X and an outer end edge (the rear waist opening edge 14b); and between the inner and outer end edges 14b, 70a. a horizontally long rectangular shape defined by the side edges 70c extending in the longitudinal direction Y, and having a first surface 80A (skin facing surface) and a second surface 80B (non-skin opposing surface) positioned on the opposite side thereof; The first bending line 71 and the second bending line 72 extending in parallel with each other. The base sheet 70 has an outer end portion 73 positioned between the outer end edge 14b and the first bending line 71, and an intermediate portion 74 positioned between the first bending line 71 and the second bending line 72; 2 The inner end portion 75 between the bend line 72 and the inner end edge 70a. A pair of opposite sides in the lateral direction X on the second surface 80B side of the outer end portion 73 The first joint domain 81A is located here, and the first non-joining domain 81B is located between the first joint domains 81A. On the first surface 80A side of the intermediate portion 74, a pair of second joining regions 82A opposed to each other in the lateral direction X are located here, and the second non-joining region 82B is located therebetween.

The base sheet 70 further has an inner sheet 76 positioned on the opposite side of the skin, an outer sheet 77 on the non-skin opposing side, and an inner sheet 76, 77 extending toward the lateral direction X at the outer end portion 73. a plurality of linear or strip-shaped rear upper waist elastic bodies 64 which are retractably held in an extended state; and retractably fixed in an extended state between the inner and outer sheets 76, 77 extending in the intermediate portion 74 toward the lateral direction X A plurality of linear or strip-shaped pocket elastomers 49.

6(b) and 6(c), the base sheet 70 is bent along the second surface 80B side of the outer end portion 73 of the first bending line 71 and the second surface 80B side of the intermediate portion 74. And the first surface 82A side of the intermediate portion 74 and the first surface 80A side of the inner end portion 75 are bent toward each other along the second bending line 72, and can be bent in the longitudinal section. Z-shaped state.

The first bonding region 81A and the second bonding region 82A have substantially the same size in the lateral direction X, and the dimensions of the lateral X in the first and second non-joining regions 81B and 82B which are located between the two are almost equal. The first and second non-joining domains 81B and 82B overlap each other in plan view of the diaper 10. The first and second joining regions 81A and 82A are formed, for example, by a known adhesive such as a hot-melt adhesive or a known hot-melting means such as heat sealing.

Referring to Fig. 6(d), the base sheet 70 is such that the outer end portion 73 is contracted by the rear upper waist elastic body 64, and is bent along the first and second bending lines 71 and 72 to pass through the first and In a state in which the second joining regions 81A and 82A are joined, a pair of third bending lines 79A and fourth bending lines (mountain folding line) 79B extending in the longitudinal direction Y along the side edges of the second non-joining field 82B are further advanced. The intermediate portion 74 and the inner end portion 75 which are laminated are bent, and the portion other than the outer end portion 73 has a slightly Ω-like cross section. The size of the lateral direction X of the base sheet 70 in such a folded state is almost the same as the dimension of the lateral direction X of the back waist region 14 in the natural state (the state in which each elastic body is not elongated).

Referring to Fig. 4 and Fig. 7 to Fig. 9, the base sheet 70 which is bent into a slightly Ω-shaped cross section is fixed to the absorbing body 12 and the rear via a joint region (third joint region) 83 having a concave shape toward the horizontal axis Q. Waist sheet 18 . In this manner, the base sheet 70 is fixed in a folded state by a plurality of bending lines, whereby the strip-shaped region 23 of the back waist region 14 is formed by the outer end portion 73, respectively, and the second non-joining portion of the intermediate portion 74 is formed. The region 82B forms the pocket inner region 42, and the pocket outer region 43 is formed by a portion of the inner end portion 75 opposed to the second non-joining region 82B. Further, both side portions of the pocket inner side region 42 and both side portions of the pocket outer side region 43 are joined to each other via the second joining region 82A.

In the present embodiment, the pocket 30 or the like is formed by fixing the base sheet 70 formed of different bodies in the back waist sheet 60, but the back waist sheet 60 and the base sheet may be formed from the integral sheet as long as the effect of the technique of the present invention is achieved. 70, the same sheet member as the back waist sheet 60 can also be used The strip-shaped domains 23 are formed, and the sheet members of the different bodies are fixed in the strip-like domains 23 to form the pockets 30. Further, the base sheet 70 may be formed of one elastic nonwoven fabric sheet, or the elastic stretchable fiber nonwoven sheet may be disposed between the inner and outer sheets 76 and 77 instead of the rear upper waist elastic body 64. Therefore, in the present specification, for example, "the pocket inner region 42 is connected to the inner end portion 41a of the central portion 41 of the strip-shaped region 23" means that the central portion 41 and the pocket inner region 42 are formed by the same sheet member, and The case where the bent portion 31 is bent; and the case where the sheet member is formed of a different body and the two sheet members are joined at the bent portion 31. Further, the sheet member forming the absorbing body 12 is extended rearward, and the folded waist sheet body and the portion extending further rearward than this may also form a pocket.

<absorber body>

The absorbing body 12 has a rectangular shape and has a front end portion 12A, a rear end portion 12B, and an intermediate portion 12C positioned between the front and rear end portions 12A and 12B. The absorbing body 12 includes a body side lining 84 having a liquid permeable non-woven fabric on the side opposite to the skin, a liquid absorbing absorbent body 85, and a bottom surface of the covering absorbent body 85 as a whole. The leakage preventing sheet 86 formed of the liquid-impermeable plastic film; and the liquid-impermeable or liquid-impermeable coated sheet 87 forming the entire non-skin opposing surface of the absorbent body 12.

The absorber 85 is composed of a core material formed of a mixture of fluff pulp and absorbent polymer particles, and a liquid-diffusing core-clad sheet formed of a tissue such as a whole core material. The absorber 85 is a front and rear end edge extending from the lateral direction X, and a longitudinal Y extension between the front and rear end edges. The rectangular shape defined by the two side edges of the extension has a concave inducing groove 80 extending from the crotch region 15 toward the rear waist region 14. In the induction groove 80, the liquid-absorbent core of the absorbent body 85 is smaller in mass than the non-existing or other portion, that is, the notched or bottomed groove. In the present embodiment, the induction groove 80 is a bottomed groove having a smaller thickness than the portion thereof. Further, although the induction groove 80 is one piece, a plurality of lines may be formed.

The cover sheet 87 has both side portions on the outer side in the lateral direction X of both side edges of the leakage preventing sheet 86. The both side portions are adjacent to both side edges of the leakage preventing sheet 86, and are bent inwardly along the bending line extending in the longitudinal direction Y (to the side of the absorbent body 85) to be fixed to the body side liner 84. The both sides have: two end fixing portions fixed to the body side liner 84 and separated from each other in the longitudinal direction Y; the proximal edge portions fixed to both side edges of the body side liner 84; and between the fixing portions at both ends A distal edge portion (free edge portion) 88 that extends in the longitudinal direction Y and extends in the longitudinal direction Y in parallel with the proximal edge portion. The distal edge portion 88 is formed in a sleeve shape formed by fixing the outer edge portion of the bent covering sheet 87, and a plurality of linear or strip-shaped side elastic members extending in the longitudinal direction Y at the edge portion The body 89 is retractably arranged in an extended state. The edge portion is contracted from the body side liner 84 toward the wearer's body side by the side elastic body 89 to form a barrier side, and is attached to the wearer's thigh portion to prevent leakage of excrement. Further, a plurality of linear or strip-shaped leg elastic bodies 90 extending in the longitudinal direction Y are retractably fixed in an extended state on both side portions of the covering sheet 87.

The leg elastic body 90 is formed of a plurality of elastic materials configured in a size required for separation in the lateral direction X, and is formed in a certain width. Since the elastic band has elasticity, it can be attached to the wearer's leg circumference in a wearing state, and the side leakage of the excrement can be effectively prevented. Further, the rear end portion of the leg elastic body 90 overlaps the rear waist region 14 and the rear lower waist elastic body 63 in plan view. The waist elastic region acting by the contraction force of the leg elastic body 90 and the contraction force of the lower rear waist elastic body 63 overlap in a plan view, and can form an imaginary elasticity around the wearer's thigh. band.

Referring to Fig. 4, the both side fixing portions 45 of the inner and outer pocket regions 42, 43 are fixed to the band-shaped region 23 and the rear end portion 12B of the absorbing body 12 via the joint region 83 having a concave shape toward the horizontal axis Q. The portion between the distal edge portions 88 of the covering sheet 87 is not fixed to the rear end portion 12B of the absorbing body 12. The base sheet 70 has such a joint state, and a rear space R for accommodating and holding the excrement moving toward the rear waist region 14 is defined between the non-joining region and the rear end portion 12B of the absorbing body 12.

In general, infants and young children of a lower age are excreted with fluidity during the various periods of breastfeeding and posture held by the mother, so that soft stools may leak from the back waist opening or may be squeezed. Pressure to stain the wearer's back. In addition, in the wearing of the diaper 10, a space for accommodating the excrement may be formed between the front waist region 13 and the body when the waist opening portion is slid down, but the rear waist region 14 has a shape in which the buttocks protrude. In order to temporarily accommodate the excrement, the diaper 10 of the present embodiment must be specifically formed in a pocket space S having a three-dimensional shape in a wearing state.

In order to solve such problems in the past diapers, The structure in which the excretion is accommodated in the accommodating space extending in the front and rear waist regions and/or the crotch region downward or rearward is provided. In the present embodiment, the back portion of the rear waist region is opened downward (toward the horizontal axis Q). The diaper 10 of the pocket 30 that extends upward is not conventional.

In the present embodiment, the band-shaped region 23 and the pocket 30 are positioned on the waist opening side of the rear waist region 14, and the band-shaped region 23 is attached to the wearer's body by the elongation stress of the rear upper waist elastic body 64. Therefore, it is possible to prevent the leakage of the excrement moving from the crotch region 15 side to the rear waist opening side, and the movement-prevented excretion flows into the pocket space S which is convexly extended upward, and is temporarily accommodated and held. As described above, by allowing the excretion prevented from moving into the pocket 30 on the back side of the back waist region 14, it is possible to suppress the discomfort and skin problems caused by the excrement contacting the body. Since the pocket 30 is not interlocked with the telescopic region 23, there is no concern that the pocket opening is closed even if the waist region 14 is extended. Moreover, since the pocket 30 is positioned higher than the upper end portion (rear end portion) of the absorber 85, it can be accommodated in the body fluid which the absorbent body 85 cannot absorb and moves to the side of the rear waist opening.

Further, a portion of the base sheet 70 forming the pocket 30 is joined in the rear waist region 14 via a joint region 83 extending from the side seam 19 to the inner side of the lateral direction X, which is itself more than the leg elastic body 90 and the side elastic body 89. It is located further outside the longitudinal direction Y and does not overlap each other in the top view of the diaper 10. Therefore, the contraction force of the leg elastic body 90 and the side elastic body 89 acts indirectly on the outer side field 43 of the pocket, and when the force to pull the downward force is exerted, there is no possibility that the outer side field 43 is pulled downward. The bent portion 33 is collapsed to eliminate the pocket space S.

2, 3, and 7, in the non-wearing state of the diaper 10, in addition to having the inner side (in the unfolded state, the longitudinal axis P side), the pocket side domains 32 of the pocket 30 are bent. In addition, in the wearing state, the pocket side regions 32 are raised to move the pocket inner region 42 in the direction F separated from the central portion 41 of the strip-shaped region 23, so that the inclination angle α with the central portion 41 becomes larger. Form a pocket space S. On the other hand, in the non-wearing state of the diaper 10, since the central portion 41 of the band-shaped region 23 and the pocket inner region 42 are brought into contact with each other in the state in which the two sides 32 of the folded pocket are formed, the back waist The area 14 is more compact as a whole, and since the size in the thickness direction Z is smaller than that in the wearing state, the diaper 10 of the plurality of diapers 10 is excellent in storage property and convenience in transportation.

Further, even if the wearer is in the supine state and the body pressure of the wearer is applied to the pocket 30, since the two sides 32 of the folded pocket are provided, the central portion 41 of the band-shaped region 23 and the inner region of the pocket are provided. Since the 42 sheets are in a state of abutting each other, the base sheet 70 is not twisted and deformed by the body pressure, and the wearer is worried about the foreign body sensation caused by the change in the thickness of the portion in the back waist region 14. The pocket side domains 32 are in a direction that is close to the wearer's body, i.e., can flex in the thickness direction Z, so that when the body pressure is opened, the pocket side domains 32 are oriented away from the body. F (refer to FIG. 9) stands up and forms a three-dimensional pocket space S again.

Therefore, the wearer becomes in a supine state, or is held by the mother in a state of being in a state of the back, and even when the force of the pocket 30 is pressed against the body side, the flexion and extension movement by the both sides 32 of the pocket can be used. Make the pocket 30 stably repeat the three-dimensional shape, so even let When a baby of a low age who frequently changes the posture or repeatedly discharges the soft stool frequently, the soft seat can be surely accommodated in the pocket space S. Further, in the present embodiment, as described above, since the pocket inner region 42 has a required size in the longitudinal direction Y, the pocket side regions 32 are raised and moved obliquely rearward with respect to the central portion 41, thereby being able to function as The function of the top surface of the pocket 30 is such that it can accommodate more excrement than the aspect of the bent structure without the top surface and the side of the pocket side 32.

In the wearing state of the diaper 10, when the belt-shaped region 23 is elongated in the lateral direction X (waist direction), the bending of the pocket side domains 32 is released, and the pocket inner region 42 is moved toward the belt-like region 23 to make the pocket The elimination of the space S will damage the three-dimensional shape. In the present embodiment, by providing the pocket elastic body 49 which is extendable in the lateral direction X in the pocket inner side region 42, when the central portion 41 is stretched to exert the force of the two sides 32 of the undulating pocket, due to the elasticity The body 49 resists the force to maintain the standing state of the pocket side field 32 and the state in which the pocket inner side field 42 is separated from the banded region 23, so that the pocket 30 can exhibit a three-dimensional shape more stably.

Further, the shrinkage ratio in the lateral direction X of the pocket inner region 42 is preferably lower than the shrinkage ratio in the lateral direction X of the strip-shaped region 23. At this time, the amount of contraction in the lateral direction X of the central portion 41 of the band-like region 23 (the length dimension in the lateral direction X of the contracted portion) is larger than the amount of contraction in the lateral direction X of the pocket inner region 42 and the pocket outer region 43 And even if the strip-shaped region 23 is stretched by a predetermined magnification in the lateral direction X from the natural state (when contracted), the pocket side domains 32 are not completely collapsed, and the pocket 30 can maintain a three-dimensional shape.

<Measurement method of shrinkage rate of each area>

First, in the unfolded state of the diaper 10, the outer layer of the pocket outer region 43 and the strip-shaped region 23 which overlap with the pocket inner region 42 in a plan view are cut out in a predetermined width (for example, a vertical dimension of 15 mm × a width of 100 mm). The product areas (areas framed by the thick frame K of Fig. 4) were taken as samples, and the size of each sample was measured by the following procedure. i) holding one end of each sample at the opposite ends of the lateral direction X, ii) mounting the clamp and the weight at the other end, so that each sample is perpendicular to the ground without being twisted Hanging. In such a state, in the arrangement area of the elastic element (in the case where the elastic element is not present at the predetermined portion of the sheet), the portion at the two positions which are laterally separated from each other is marked with ink or the like, and the separation size between the marks is measured, and This was taken as the size (L1) at the time of shrinkage of each sample. Further, the weight of the weight can be adjusted as long as it does not elongate the elastic element disposed in each sample, and in this measurement, a weight of about 5.0 g is used. Iii) Next, the jig and the weight were removed from each sample, and the direction X was elongated until the wrinkles which were not formed by the elastic elements on the surface, and the separated size of the marks at the two points was measured as the dimension (L2) at the time of elongation. The shrinkage ratio (%) of each sample was calculated by applying the dimensions L1 and L2 measured by such a measurement method to a formula of shrinkage ratio = ((L2 - L1) / L2) × 100 (%).

The inner end portion 41a of the central portion 41 connected to the pocket inner region 42 is located outside the longitudinal portion Y than the central portion of the longitudinal direction Y of the rear waist region 14. Therefore, since the center portion 41 can be attached to the body above the groove (groove) of the buttocks of the wearer, the center portion 41 and the body are compared with the case of abutting the concave groove. The gap is not easy to produce, there may be Effectively suppress the leakage of excrement. Further, although not shown, in the front waist region 13, in order to temporarily accommodate and hold the urine, a pocket that can be opened downward may be disposed in the same manner as the rear waist region 14.

In the present embodiment, the rear upper waist elastic body 64 is disposed almost uniformly over the entire size of the longitudinal direction Y of the band-shaped region 23. The contraction force of the rear upper waist elastic body 64 may be almost constant or different from each other. For example, the contraction force of the rear upper waist elastic body 64 may be adjusted so that the contraction force of the lower end portion (inner end portion) 41a is higher than the other portions except for the lower end portion. In other words, the opening of the pocket 30 can be made higher by setting the contraction force of the rear upper waist elastic body 64 disposed at the lower end portion 41a to be higher than the other rear upper waist elastic body 64 disposed outside the lower end portion 41a. The fit to the body in the vicinity increases, allowing the excrement to flow reliably into the pocket space S.

Further, in the back waist region 14, a concave inducing groove 80 extending from the crotch region 15 toward the rear waist region 14 is formed in the absorber 85. Even if a force such as a body pressure is applied to the vicinity of the opening of the pocket 30 to make the opening small, the soft stool discharged to the absorbent body 85 can be induced into the pocket space S along the induction groove 80, so that it can be The excrement is contained and held in the pocket space S. In order to easily induce the excrement into the pocket space S, the inducing groove 80 is the back waist elastic body 63, 64 located between the side seams 19 of the rear waist region 14 from the position of the crotch region 15 side to the back waist. The field 14 extends ideally and does not necessarily extend to the rear end edge of the absorbent body 85. Further, by making the absorber 85 thinner in the induction groove 80, the step difference between the lower end portion of the pocket forming portion 20 positioned above it becomes smaller, whereby it can be said that It is possible to make the excretion easier to flow into the pocket space S.

<Modification 1>

FIG. 10 is a view showing an example of a modification of the diaper 10 of the embodiment, and is the same as that of FIG. 8.

Referring to Fig. 10, a rear auxiliary sheet 58 having elastic stretchability is disposed on the skin facing surface side of the strip-shaped region 23. When the band-shaped region 23 is attached to the body only by the contraction force of the linear or strip-shaped rear upper waist elastic body 64, there is a concern that a relatively large wrinkle which is a cause of body leakage is formed. By arranging the rear auxiliary sheet 58 on the skin facing surface side of the strip-shaped region 23, not only the skin feel is improved, but also a relatively small wrinkle characteristic of the elastic sheet is formed on the surface, so that the soft stool can be prevented from being wrinkled from the waist. The case where the opening leaks to the outside.

Further, the rear auxiliary sheet 58 may be formed of a sheet material which is relatively elastic or inelastic and has a high cushioning property. In such a case, even if the contraction force of the rear upper waist elastic body 64 is set relatively high in order to improve the fit of the rear waist region 14, there is at least no skin facing surface in the band region 23. The side rear auxiliary sheet 58 exerts a cushioning function to cause wrinkles on the body.

<Modification 2>

Fig. 11 is a view similar to Fig. 8 showing an example of a modification of the diaper 10 of the embodiment.

Referring to Fig. 11, in the present modification, the base sheet is 70 forms a banded field 23 from which the inner and outer side regions 42, 43 are formed. The one end edge portion 60a of the back waist sheet 60 is joined to the base sheet 70 via the joint region 92 in a state of being bent. The bonding region 92 is formed, for example, by a hot-melt adhesive applied to the opposing faces of the two sheets 60 and 70, and various well-known thermal fusion means. Thus, the strip-shaped region 23 and the pocket inner-outer regions 42, 43 may each be formed of sheet members of different bodies, and the pocket inner region 42 and the pocket outer region 43 may also be formed by sheet members of different bodies. The inner end portion 93 of the base sheet 70 extends from the inner side (downward) of the joint field 92 toward the longitudinal direction Y. The base sheet 70 forming the strip-shaped region 23 extends downward from the joint region 92, and the extended lower portion functions as a barrier that prevents the excrement flowing into the pocket space S from moving toward the body side.

<Modification 3>

FIG. 12 is a view similar to FIG. 3, showing an example of a modification of the diaper 10 of the embodiment.

Referring to Fig. 12, in the present modification, a liquid-impermeable sheet 94 is disposed in the strip-shaped region 23. The sheet 94 is fixed between the inner and outer sheets 76, 77 forming the base sheet 70. By arranging the liquid-impermeable sheet 94 in the strip-shaped region 23, it is possible to effectively prevent leakage of excrement which has not flowed into the pocket space S and moves to the side of the rear waist opening to the outside.

<Modification 4>

Fig. 13 is a view showing a modification of the diaper 10 of the embodiment. For example, it is the same figure as FIG.

Referring to Fig. 13, in the present modification, the leakage preventing sheet 86 extends from the pocket outer side region 43 toward the bent portion 33, and further extends from the bent portion 33 to the pocket inner side region 42. When the base sheet 70 is formed only of the fiber nonwoven fabric, the soft stool having high fluidity cannot be sufficiently maintained, and there is a concern that it oozes out to the outside, and the rear end portion 86a of the liquid-impermeable leakage preventing sheet 86 is positioned in the pocket 30. It has excellent leakproofness and prevents the leakage of such soft stools. Further, the leakage preventing sheet 86 is a size having a lateral direction X larger than the size of the lateral direction X of the pocket opening of the pocket 30. Therefore, it is possible to effectively prevent the exudation of the excrement that has entered the pocket space S from the pocket opening.

In addition to the case where the constituent materials constituting the diaper 10 of the present invention are specifically described, various well-known materials which are generally used in the field of this kind can be used without limitation. Further, in the present specification, the front and rear waist regions 13 and 14 are formed of different front and rear waist sheets 17 and 18, but the front and rear waist regions 13, 14 and 胯 may be used. The configuration in which the lower sheet 15 is continuous with the sheet may be a sleeve type in which the both side edges of the front and rear waist regions 13 and 14 are not connected in advance, and the unfolded diapers are connected by a buckle. In addition, the terms "1st" to "3rd" used in this specification are used only to distinguish the same elements and positions.

At least the following matters can be summarized in the disclosure of the present invention described above.

A disposable diaper having a vertical direction and a lateral direction and a front-back direction intersecting the wearable state, and comprising: a skin abutting surface and The non-skin abutting surface on the opposite side, the front waist region, the back waist region, the underarm region located between the front and rear waist regions, and the absorbent body extending from the axillary region to the front and rear waist regions are discarded A diaper having a belt-shaped region extending in a lateral direction on the skin contact surface side and a pocket forming portion positioned on the non-skin abutting surface side, and a pocket having a central portion in the lateral direction and the strip-shaped region facing downward in the front-rear direction, wherein the pocket forming portion has a fixed portion fixed to both sides of the strip-shaped region; a pocket inner region extending upward from a portion connected to the strip-shaped region; and a pocket outer region facing the aforementioned armpit by a bent portion extending in the lateral direction and the inner side of the pocket in the front-rear direction a region extending and extending on an extension line of the absorbent body, wherein a pocket elastic body extending in the lateral direction is disposed in the inner side of the pocket, and the outer side of the pocket has a side edge on both sides of the absorbent body Extension of the lateral position of the line portion is bent.

The disposable diaper of the present invention disclosed in the above paragraph 0058 may include at least the following embodiments.

(1) The pocket forming portion has a pocket side surface formed by both side portions of the inner and outer sides of the pocket, and the pocket elastic body is disposed between the two sides of the pocket, and the pocket elastic body is provided by the pocket elastic body The sides of the pocket are contracted toward the inner side of the lateral direction to be bent.

(2) The pocket elastic body extends in the lateral direction between the both side fixing portions of the pocket forming portion.

(3) The band-like region is elastically stretchable in the lateral direction.

(4) The shrinkage ratio in the aforementioned transverse direction of the aforementioned band-shaped region is higher than the shrinkage ratio in the aforementioned transverse direction of the inner side of the pocket.

(5) In the back waist region, an inducing groove extending from the crotch region to the rear waist region is formed in the absorber.

(6) The belt-shaped region and the pocket forming portion are located on the waist opening side of the rear waist region.

(7) A sheet having elastic stretchability is disposed on the skin facing surface side of the portion of the pocket inner region facing the front-rear direction.

(8) The strip-shaped region has upper and lower end portions opposed to each other in the vertical direction, and a contraction force of the lower end portion is formed to have a higher contraction force than a portion other than the lower end portion.

(9) Further, there is provided a liquid-impermeable sheet which extends from the upper end portion of the absorbent body to the bent portion and which has a lateral dimension larger than the lateral dimension of the opening of the pocket.

45‧‧‧ fixed parts on both sides

23‧‧‧ Banded domain

41‧‧‧The central part of the strip

14b‧‧‧Opening edge of the back waist

41b‧‧‧Outside

21‧‧‧ waist opening

14‧‧‧ Back waist

10‧‧‧Disposable disposable diapers

31‧‧‧Bends

32‧‧‧ pocket sides

49‧‧‧ Pocket elastomer

33‧‧‧Bends

20‧‧‧ Pocket Formation

43‧‧‧ Pocket outer domain

85c‧‧‧ both sides

30‧‧ ‧ pocket

15‧‧‧胯下域

85‧‧‧ absorber

32‧‧‧ pocket sides

41a‧‧‧Inside

42‧‧‧ pocket inner domain

78‧‧‧ wrinkles

F‧‧‧ directions

Claims (10)

A disposable diaper having a vertical direction and a lateral direction intersecting with the front and rear direction in a wearing state, and comprising: a non-skin abutting surface, a front waist region, and a rear side of the skin abutting surface and the opposite side thereof A disposable diaper having a waist region, an underarm region located between the front and rear waist regions, and an absorbent body extending from the underarm region to the front and rear waist regions, wherein the back waist region has: a band-shaped region extending laterally toward the skin contact surface side; and a pocket forming portion positioned on the non-skin abutting surface side and having a central portion in the lateral direction and the band-shaped region The front and rear direction are opposite to each other, and the pocket forming portion has a fixing portion fixed to both sides of the strip-shaped region, and extends from a portion connected to the strip-shaped region between the two side fixing portions. a pocket inner region; and a pocket outer region extending from the bent portion extending in the lateral direction and the inner side of the pocket toward the front and rear regions in the front-rear direction and on the extension line of the absorbent body Said pocket is disposed inside the pocket domain to the elastomeric transversely extending outside the pocket region, having an extension line to the bit position of the edge portion of the absorbent body on both sides of the transverse portion is bent. The disposable diaper according to the first aspect of the invention, wherein the pocket forming portion has a pocket side region formed by both side portions of the inner and outer sides of the pocket, between the two sides of the pocket The pocket elastic body is disposed, and the both sides of the pocket are bent toward the inner side of the lateral direction by the contraction of the pocket elastic body. If it is used in the first or second paragraph of the patent application scope, it will be discarded. In the diaper, the pocket elastic body extends in the lateral direction between the both side fixing portions of the pocket forming portion. The disposable diaper according to the first or second aspect of the invention, wherein the strip-shaped region is elastically stretchable in the lateral direction. The disposable diaper according to the fourth aspect of the invention, wherein the shrinkage ratio in the lateral direction of the strip-shaped region is higher than the shrinkage ratio in the lateral direction of the inner-outer region of the pocket. The disposable diaper according to claim 1 or 2, wherein in the back waist region, an inducing groove extending from the crotch region to the rear waist region is formed in the absorbent body. The disposable diaper according to the first or second aspect of the invention, wherein the belt-shaped region and the pocket forming portion are located on a waist opening side of the rear waist region. The disposable diaper according to the first or second aspect of the invention, wherein the belt-shaped region and the pocket inner region are disposed on the skin-facing surface side of the portion facing the front-rear direction to have elastic expansion and contraction Sexual thin slices. The disposable diaper according to the fourth aspect of the invention, wherein the strip-shaped region has an upper and lower end portions opposed to each other in the vertical direction, and a contraction force of the lower end portion is formed other than the lower end portion. The part of the contraction force is higher. A disposable diaper according to claim 1 or 2, further comprising an upper end portion of the absorbent body To the aforementioned bent portion, and the aforementioned liquid-impermeable sheet having a lateral dimension larger than the aforementioned lateral dimension of the opening of the pocket.