TW201622672A - Disposable diaper - Google Patents

Abstract

The present invention is a disposable diaper comprising a pocket that houses and holds excrement which moves toward the waist opening side in a rear waist region, and with which it is possible to prevent excrement from contacting the wearer's skin. In this disposable diaper (10), a rear waist region (14) comprises: a band-shaped region (skin-contacting region) (23) that is located on the skin-opposing surface side, and that extends along the lateral direction (X); and a pocket-forming section (20) including a pocket (30) that is located on the non-skin-opposing surface side, and that opposes the band-shaped region (23) in the front-to-rear direction in a central section in the lateral direction (X). The pocket-forming section (20) includes: side fixing sections (45) that are fixed to the band-shaped region (23); a pocket inside region (42) that extends upward from a section connected to the band-shaped region (23) between both side fixing sections (45); and a pocket outside region (43) that opposes the pocket inside region (42) in the front-to-rear direction via a bending section (33) extending along the lateral direction (X), and that extends toward the crotch region (15) side. The band-shaped region (23) can elastically expand/contract in the lateral direction (X), and between both side fixing sections (45), the contraction rate of the band-shaped region (23) is greater than the contraction rate of the pocket outside region (43).

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 a pocket opening toward the underarm region 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 waist region before and after stretching in the waistline direction, the stretchable sheet is attached to the wearer's body immediately after the front and rear ends of the liquid-absorbent structure. body. Therefore, the opening of the receiving pocket defined between the stretch sheet and the front and rear end portions is closed, and the excrement cannot enter the pocket, and there is a concern that the back surface of the wearer is dirty when the excrement does not enter the pocket. In order to avoid such a situation, when the fit of the back waist region is lowered, the pocket is easily formed, but a gap is formed between the body and the back waist region due to a decrease in fit, and there is a discharge in the pocket. The possibility of moving inside the pocket and moving on the stretch sheet. Therefore, there is a need for an excrement that can be surely stored on the side of the back waist, and that allows the excreted matter after being stored to be separated from the body without coming into contact with the skin.

An object of the present invention is to improve the diaper of the related art, and to provide a pocket in which the excrement that accommodates and holds the movement toward the waist opening side and which prevents the excrement from coming into contact with the wearer's skin is provided in the back waist region. Disposable diapers after use.

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-rear direction intersecting the same, and has a skin abutting surface and a side opposite thereto. Skin abutment surface, front waist region, back waist region, located between the aforementioned front and back waist regions Under the domain.

In the disposable diaper of the present invention, the back waist region has a band-shaped region extending in the lateral direction on the skin abutting surface side, and a pocket forming portion positioned on the non-skin abutting surface a side pocket having a central portion in the lateral direction facing the strip-shaped region facing 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 region; and a pocket outer region that is opposed to the pocket inner region in the front-rear direction by the bent portion extending in the lateral direction Side extension,

The strip-shaped region is elastically expandable and contractible in the lateral direction, and the shrinkage ratio of the strip-shaped region is larger than the shrinkage ratio of the outer side of the pocket between the both side fixing portions.

The disposable diaper of the present invention has a pocket inner region connected by a band-like domain elastically stretchable in the back waist region; and a pocket outer region opposed to the front-rear direction The pocket that can be opened downward is not closed even if the opening of the belt-shaped pocket is in the wearing state, and the discharge that moves toward the opening side of the back waist can be discharged into the pocket to prevent leakage to the outside. It also avoids discomfort and skin problems caused by excretions coming into contact with the skin.

10‧‧‧Disposable disposable diapers

13‧‧‧ Front waist

14‧‧‧ Back waist

The central part of the upper and lower directions of the rear waist region of 14H‧‧‧

15‧‧‧胯下域

20‧‧‧ Pocket Formation

23‧‧‧ Banded domain

30‧‧ ‧ pocket

32‧‧‧ pocket sides

33‧‧‧Bends

41‧‧‧The central part of the strip

41a‧‧‧The inner end of the central part of the strip (lower end)

41b‧‧‧The outer end of the central part of the strip (upper end)

42‧‧‧ pocket inner domain

43‧‧‧ Pocket outer domain

45‧‧‧ fixed side of the pocket

58‧‧‧After auxiliary sheet

85‧‧‧ absorber

86‧‧‧ leakproof sheet

86a‧‧‧The rear end of the leak-proof sheet (upper end)

95‧‧‧Induction groove

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 the diaper in a worn state as viewed from the back side.

Fig. 4 is a partially broken perspective view 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 a broken perspective exploded view of a portion of the diaper.

Fig. 6 (a) is a developed plan view of a base sheet, and Fig. 6 (b) is a view showing a folding stroke of a base sheet. (c) 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. 1 .

Fig. 8 is a schematic cross-sectional view taken along line VIII-VIII shown in Fig. 3 .

FIG. 9 is a view similar to FIG. 2 in Modification 1. FIG.

FIG. 10 is a view similar to FIG. 7 in Modification 2. FIG.

FIG. 11 is a view similar to FIG. 7 in Modification 3. FIG.

FIG. 12 is a view similar to FIG. 7 in Modification 4. FIG.

FIG. 13 is a view similar to FIG. 7 in Modification 5.

[Formation for carrying out the invention]

An example of a disposable diaper of the present invention is shown. The diaper 10 of the sleeve type (pants type) has: a longitudinal direction Y; a lateral direction X; and the orthogonal thickness direction (3 dimensional elements) Z; and an up-and-down direction in a wearing state, and has: along the longitudinal direction Y extends, 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 of the horizontal 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 a skin abutting surface and a non-skin abutting surface opposed thereto, and an annular elastic waist sheet 11 extending in the waistline direction; being joined 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 has front and rear end portions 12A and 12B, and an intermediate portion 12C positioned between the front and rear end portions 12A and 12B. The front and rear end portions 12A and 12B are attached to the non-skin contact surfaces of the front and rear waist sheets 17 and 18, respectively. (outside of the diaper 10).

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 superposed on each other, and are joined by side seams 19 which are intermittently arranged in the longitudinal direction Y. Both side edges of the diaper 10 are formed and 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>

1 to 3, the diaper 10 has a belt-shaped region 23 extending in the lateral direction X on the skin contact surface side of the waist opening side of the rear waist region 14; and a pocket forming portion 20 The central portion of the lateral direction X of the rear waist region 14 is provided with a pocket 30 that faces the belt-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 is formed by a part of the absorbing body 12, and has a fixing portion 45 fixed to both sides of the strip-shaped region 23, and is connected from the central portion 41 of the strip-shaped region 23 between the both-side fixing portions 45. The pocket inner side region 42 extending partially upwards, and the pocket outer side region 43 extending 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. The both side fixing portions 45 extend from the side seams 19 to the inner side of the lateral direction X. Therefore, the pockets 30 are not sized to have an opening between the side seams 19, but at least have a central portion opened in the rear waist region 14. The size of the person.

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-side region 42 and the inner end portion 41a of the central portion 41 are connected via a bent portion 31. Band zone 23 and pocket 30 are in the back The waist opening side of the waist region 14. Here, the "waist opening side of the back waist region 14" means a region which is equal to the line which divides the dimension 2 of the longitudinal direction Y of the rear waist region 14 to the outer edge 14b side.

The band-shaped region 23 is elasticized at least in the lateral direction X by the rear upper waist elastic body 64 which will be described later. Referring to Fig. 3, in the present embodiment, the dimension W1 of the lateral direction X of the central portion 41 of the strip-shaped region 23 and the dimension W2 of the lateral direction X of the pocket outer region 43 are the same in the state in which the central portion 41 is not contracted. The non-wearing state and/or the wearing state of the diaper 10 is contracted by the center portion 41, and the dimension W1 of the lateral direction X of the center portion 41 becomes smaller than the dimension W2 of the lateral direction X of the pocket outer region 43. Thus, by the dimension W1 becoming smaller than the dimension W2, a plurality of pleats 78 are formed in the pocket inner region 42 connected to the central portion 41 to shorten the wide size thereof, and the pocket outer region 43 is oriented toward the wearer. The body moves in the direction of separation. Therefore, the pocket 30 has a bent portion 31 that is bent in the downward direction (toward the horizontal axis Q), and a bent portion 33 that is bent upward (toward the waist opening 21), by which the mutually oriented The different directions are bent. When the band-shaped region 23 is elongated in the waistline direction, the pocket inner region 42 extends obliquely with respect to the band-like region 23, and a pocket space S for accommodating and holding excrement is formed inside the pocket 30.

<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 an inner sheet 51 positioned on the skin contact surface side; and is located outside the non-skin abutting surface side. a sheet 52; and a plurality of strip-shaped or strip-shaped front waist elastic bodies 55 which are retractably fixed between the sheets 51 and 52 in a lateral X-extension state.

The back waist sheet 18 has a back waist sheet 60 formed of an inner sheet 61 positioned on the skin contact surface side and an outer sheet 62 positioned on the non-skin contact surface side; and a plurality of strips extending in the lateral direction X Linear or strip-shaped back waist elastics 63, 64. The back waist elastic body is contracted and fixed in an extended state between the inner and outer sheets 61 and 62. The back waist elastic bodies 63 and 64 have a rear lower waist elastic body 63 positioned on the side of the crotch region 15 and a rear upper waist elastic body 64 positioned on the side of the waist opening. The rear lower waist elastic body 63 is a pair of elastic domains formed to be opposed to each other in the lateral direction X, and a non-elastic domain is defined between the pair of elastic domains. The inelastic region overlaps with the rear end portion of the absorber 85 to be described later in plan view.

<absorber body>

The absorbent body 12 is a body side liner 84 made of a fiber-nonwoven fabric which is located on the skin contact surface side and has a liquid permeable property. The liquid absorbing absorbent body 85 is opaque to the entire bottom surface of the covering absorbent body 85. A leakage preventing sheet 86 formed of a liquid plastic film; and a liquid-impermeable or liquid-impermeable coated sheet 87 forming an entire non-skin contact 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 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. Both sides are adjacent to the leak-proof sheet The side edges of the 86 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 arranged in a size required for separation in the lateral direction X, and is formed in an elastic band having a certain width and elasticity, so that it is conformed to the wearer in a wearing state. The leg circumference can effectively prevent the side leakage of the excrement. Further, the rear end portion of the leg elastic body 90 overlaps the rear waist elastic body 63 in a plan view in the rear waist region 14. The waist elastic region, which acts by the contraction force of the leg elastic body 90 and the contraction force of the lower rear waist elastic body 63, overlaps in a plan view, and can form an imaginary elastic band around the wearer's thigh. .

Referring to Fig. 5 and Fig. 6(a), in the present embodiment, the pocket forming portion 20 is formed by the rear end of the absorbent body 85 from the covering sheet 87. The portion is further formed by extending a portion extending outward of the longitudinal direction Y. The pocket forming portion 20 has a first bending line 71 and a second bending line 72 extending in the lateral direction X, and is divided into: a first portion 74 positioned between the outer end edge 87b and the second bending line 72; The second portion 75 between the first bending line 71 and the second bending line 72; and the third portion 76 located inside the longitudinal direction Y of the second bending line 72.

6(b) and 6(c), the pocket forming portion 20 is a skin contact surface between the skin contact surface of the second portion 75 and the portion where the absorbent body 85 is disposed along the first bending line 71. The grounding is bent, and is bent along the second bending line 72 so that the non-skin contact surface side of the first portion 74 and the non-skin contact surface side of the second portion 75 are bent against each other. The profile is approximately Z-shaped.

The pocket forming portion 20 is configured such that the skin contact surface side of the second portion 75 and the skin contact surface of the third portion 76 are applied to the opposing surfaces of the second portion 75 so as to maintain such a bent state. The pair of first side joining regions 81A of the known joining means such as one of the adhesives are joined to each other. The first side joining domain 81A is opposed to each other in the lateral direction X, and the non-joining domain 81B where the second portion 75 and the third portion 76 are not joined is located between the first side joining regions 81A. In addition, the pocket forming portion 20 is fixed to the non-skin contact of the second portion 75 via the second side joining region 82A formed by the hot-melt adhesive applied to the non-skin contact surface side of the first portion 74. Face side. The second side joining domain 82A is opposed to each other in the lateral direction X, and the non-joining domain 82B is located between the second side joining domains 82A. The first side joint region 81A and the second side joint region 82A are substantially the same in the lateral X dimension. And the dimensions of the lateral X of the non-joining domains 81B, 82B located between the two are also almost equal, and the non-joining domains 81B, 82B overlap each other in the plan view of the diaper 10. In the arrangement region of the first and second side joining regions 81A and 82A, the both side fixing portions 45 of the pocket inner and outer regions 42 and 43 are located.

Referring to Fig. 4, the outer side of the back waist sheet 18 is attached by bending the pocket forming portion 20 of the coated sheet 87, and the pocket inner field 42 is formed by the non-joining field 82B of the second portion 75. The pocket outer region 43 located on the extension line of the absorber 85 is formed by the non-joining domain 81B of the third portion 76. The rear end portion 12B of the absorbent main body 12 including the pocket forming portion 20 is attached to the rear end portion 12B which is formed in a concave shape toward the crotch region 15 side by a hot-melt adhesive applied to the skin-facing surface side thereof. Waist sheet 18 . Further, the distal end portion 12A of the absorbing body 12 is attached to the front waist sheet 17 via a joint region 83 formed in a concave shape toward the crotch region 15 side by a hot-melt adhesive applied to the skin-facing surface side.

In the present embodiment, the pocket 30 or the like is formed by fixing a part of the covering sheet 87 formed of a different body to the back waist sheet 18, and the back waist sheet may be formed of an integral sheet as long as the effect of the technique of the present invention is achieved. 60 and the cover sheet 87, the sheet forming portion 20 may be formed of a sheet different from the coated sheet 87. Further, the pocket forming portion 20 may be formed of a fiber nonwoven sheet having elastic stretchability, or an elastic body may be disposed in a part thereof. Therefore, in the present specification, for example, "the inner side portion 41a of the central portion 41 of the band-shaped region 23 and the inner end portion 41a of the band-shaped region 23 are connected via the bent portion 31" means that the central portion 41 and the inner side of the pocket are formed by the same sheet member. Field 42, while the bent portion 31 is bent; and The sheet members of different bodies form the same, and the two sheet members are joined at the bent portion 31.

In general, when handling soft stools with high fluidity excreted by infants and younger children of a lower age, how to prevent the body from being soiled in the diaper and how to prevent leakage to the outside is a problem. In particular, in the supine state and the side lying state, in order to prevent excretion from leaking from the waist opening to the outside, for example, it is also conceivable to increase the elongation stress of the waist elastic body. However, when the soft fluid has high softness, there is a pass through the waist elastic body. There is a concern that the formed wrinkles leak to the outside. Further, in the wearing of the diaper 10, it is also conceivable to form a space for accommodating the excrement between the body and the body when the waist opening portion is slid down, but the hip waist region 14 has a shape protruding from the buttocks. Therefore, it is difficult to form such a gap, and in order to temporarily accommodate and hold 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 a problem, the conventional diaper has a structure in which the excrement is accommodated in the accommodating space extending in the front and rear waist regions and/or the crotch region downward or rearward, but in the present embodiment, the back of the rear waist region is provided. A diaper 10 having a pocket 30 that opens downward (toward the horizontal axis Q) and extends upward is not conventional.

In the present embodiment, since the band-shaped region 23 on the side of the back waist opening is bonded to the wearer's body by the elongation stress of the rear upper waist elastic body 64, it is possible to prevent the opening from the underarm region 15 to the back waist. Leakage of the side-moving excrement is caused, and the excretion in which the movement is prevented is flowed into the pocket space S which is convexly extended upward, and is temporarily accommodated and held. So, borrow The excrement is accommodated in the pocket space S at a position separated from the body, without the concern that the back side of the wearer is soiled due to the excrement. Further, the pocket 30 does not have the possibility of closing the opening due to the expansion and contraction of the rear waist region 14, and it is possible to absorb excrement and urine having high fluidity which is not absorbed by the absorbent body 85 and flows toward the waist opening in the pocket space S. Therefore, the body fluid of the absorbent body 85 or more can be accommodated in the diaper 10.

A part of the pocket forming portion 20 forming the pocket 30 is joined to the rear waist sheet 18 via the joint region 83, and the joint region 83 does not overlap the leg elastic body 90 and the side elastic body 89 in plan view. Therefore, since there is no force directly acting on the outer side of the pocket 43 due to the contraction, the shape of the bent portion 33 does not collapse, so there is no downward movement. Pulling the pocket outer field 43 causes the pocket space S to be eliminated.

In this way, in order to separate the pocket 30 from the strip-shaped region 23 of the rear waist region 14, the inner-outer pocket regions 42, 43 are connected to each other via the bent portion 33, and the strip-shaped region 23 can elastically expand and contract in the lateral direction X, and in the central portion 41 The amount of contraction of the lateral direction X (the contraction dimension to the lateral direction X), and the amount of contraction of at least the lateral direction X of the pocket outer side field 42, 43 with respect to the lateral direction X of the pocket outer region 43 (the contraction dimension to the lateral direction X) must have a dimensional difference. Specifically, the strip-shaped region 23 has a high shrinkage ratio in the lateral direction X than the pocket inner region 42 and the pocket outer region 43. The pocket inner-outer regions 42, 43 are substantially elastic and non-elastic, or have elasticity. When it is stretched, its contraction force becomes lower than that of the band domain 23.

Moreover, the pocket outer field 43 of the pocket forming portion 20 is located at The extension line of the absorber 85. By extending the relatively thick and rigid absorbent body 85 to the vicinity of the opening edge portion (bending portion 31) of the pocket 30, both sides of the pocket outer region 43 are made by the both side edges of the lower absorbent body 85. Highlights to the outside of the lateral X. Therefore, when the pocket 30 is formed by the difference in contraction between the band-shaped region 23 and the outer side region 43 of the pocket, since the portion which is located on the extension line of the both side edges of the absorbent body 85 is bent as a starting point, the pocket 30 is stabilized. Box 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 overlapping with the pocket inner region 42 in a plan view are cut out at 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. 2) 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 the elastic element of each sample is not stretched, and a weight of about 5.0 g is used in the measurement. Iii) Next, remove the jig and weight from each sample, and extend to the lateral direction X until the surface has no wrinkles for the elastic elements, and measure the separation size of the marks at 2 points. It is the size (L2) when it is stretched. 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 central portion 41 of the band-shaped region 23 has an extended portion 80 that is located lower than the inner end portion 41a connected to the pocket inner region 42 (to the side of the crotch region 15). By forming the pocket 30 and moving the absorbent body 12 in the direction of separation from the body, the area of the contact area that abuts against the back side of the wearer is reduced, and the fit is lowered. The extension portion 80 extends downward from the bent portion 31, and a certain area of the contact region can be secured, and the decrease in the fit can be suppressed. In addition, the extension portion 80 functions as a barrier that prevents the excrement flowing into the pocket space S from moving (returning) to the body side.

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 center portion 41. 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 disposed at the inner end portion 41a may be adjusted to be higher than the contraction force of the elastic body disposed at the other portion, and the inner end portion (lower end portion) may be provided. The contraction force of 41a is higher than the other portions including the outer end portion (upper end portion) 41b. Thus, by setting the contraction force of the inner end portion 41a higher than that of the other portions, that is, by setting the contraction force of the bent portion 31 forming the opening edge portion of the pocket 30 to be relatively high, The opening edge of the pocket 30 is attached to the wearer's body to prevent the movement of the excrement toward the waist opening side.

In the present embodiment, the central portion 41 is formed by and forming a pocket. The pocket forming portion 20 of 30 is formed by different sheet members. As described above, when the pocket 30 is formed by a sheet member different from the central portion 41 of the waistband forming the back waist region 14, it is not necessary to bend or deform the back waist sheet 18 itself, and the conventional user can be used, and the manufacturing cost can be suppressed. . Moreover, in the manufacture of the diaper 10, since the pockets are joined by joining the other sheet members in the back waist sheet 18 which moves in the machine direction, it is easy to manufacture without special assembly work.

Referring to Fig. 7, the inner end portion 41a of the central portion 41 connected to the inner pocket region 42 is positioned higher than the central portion 14H 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 easily generated, and the leakage of excrement can be effectively suppressed. 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.

<Modification 1>

Referring to Fig. 9, in the present modification, the size of the lateral direction X of the inner and outer side regions 42, 43 is larger than the size of the lateral direction X when the central portion 41 is contracted, and wrinkles are formed on both sides of the pocket forming portion 20. Partially produced, the pocket forming portion 20 further has a pocket side field 32 formed by both side portions of the pocket inner and outer regions 42, 43. The pocket side domains 32 are contracted by the strip-shaped domains 23 and are expandable toward the inner side of the lateral direction X (toward the longitudinal axis P).

The pocket sides 32 are folded as long as they are stretched. The portion that is intentionally bent is bent toward the inner side of the lateral direction X to form a plurality of bending lines extending in the longitudinal direction Y. The pocket side field 32 is folded inwardly due to the wrinkles. Therefore, in the non-wearing state of the diaper 10 (the state in which the center portion 41 is contracted), the pocket inner region 42 and the pocket outer region 43 are in contact with each other. Can not form a pocket space S. In order to form a state in which the both sides 32 of the pocket are stably folded, the bending line extending in the longitudinal direction Y may be imparted by press working and/or heat processing.

In the case of the infants and young children of the low-month-old age, the pockets of the accommodating space for forming the temporary excrement are provided in the squat area and the waist area. There are also cases where the pocket is crushed by external pressure and body pressure, and it is difficult to form a pocket again after being opened.

In the present modification, the wearer is in a supine state, and when the wearer's body pressure is applied to the pocket 30, the central portion 41 and the pocket of the banded region 23 are provided because of the aspect of the two sides 32 of the pocket. Since the inner side regions 42 are in contact with each other, there is no fear that the wearer will have a foreign body sensation due to a change in the thickness of the portion in the rear waist region 14. Further, since the pocket side regions 32 are folded inwardly, they can be separated from the wearer's body, that is, they can flex and extend in the thickness direction Z, so that the body pressure is opened. At this time, the pocket side domains 32 stand up in the direction F separated from the body, and the three-dimensional pocket space S is formed again. In this way, even when the pocket 30 repeatedly acts to press this force toward the body side, since the pocket 30 can stably assume a three-dimensional shape by the flexion and extension movement of the both sides of the pocket, the posture is frequently changed, or the frequency is high. When the infant of the low-month-old infant who repeatedly discharges the soft stool is worn, the soft stool 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 Since the function of the top surface of the pocket 30 is such that it can accommodate more excrement than the aspect of the side structure of the side surface side which does not have a top surface and a pocket.

Further, in the non-wearing state of the diaper 10 of the present modification, the pocket side regions 32 of the pocket 30 are folded inwardly in the lateral direction X to have a substantially V-shaped cross section. In this way, in the non-wearing state, since the central portion 41 of the band-shaped region 23 and the pocket inner region 42 are brought into contact with each other by the two sides 32 of the pocket, the entire rear waist region 14 becomes more compact. Further, 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 storability and convenience in transportation. Further, although not shown, the pocket side regions 32 are stably bent in order to be stretched, so that the pocket inner region 42 and the both side fixing portions 45 may be provided with a pocket elastic body that continuously extends in the lateral direction X.

<Modification 2>

With reference to Fig. 10, in the diaper 10 of the present modification, the rear auxiliary sheet 58 having elastic stretchability is disposed on the skin contact surface side of the central portion 41 of the band-shaped region 23. The rear auxiliary sheet 58 is, for example, relatively bulky, including a stretchable fiber nonwoven fabric having an elastic fiber having a desired flexibility, and is formed of a sheet member having excellent cushioning properties. Only by wire or strip When the contraction force of the rear upper waist elastic body 64 causes the central portion 41 to be attached to the body, there is a concern that a relatively large wrinkle which causes a body leak may occur, but the skin is abutted at the central portion 41. The rear auxiliary sheet 58 made of the stretchable fiber non-woven fabric on the front side is not only improved in the touch of the skin, but also has a relatively small wrinkle characteristic of the elastic sheet on the surface, so that the soft stool can be prevented from leaking from the waist opening to the outside along the wrinkle. Happening.

Further, in order to improve the adhesion of the rear waist region 14, when the contraction force of the rear upper waist elastic body 64 is relatively high, the rear auxiliary sheet 58 on the skin contact surface side does not have a buffer function. And in the case of wrinkles in the body. Although not shown, even in the skin contact surface side of the front waist region 13, a front auxiliary sheet formed of a stretchable fiber nonwoven fabric can be disposed. In this way, by arranging the front and rear auxiliary sheets formed of the elastic fiber nonwoven fabric on the skin contact surface side of the front and rear waist regions 13 and 14, the diaper 10 as a whole has improved skin feel and excellent wearing feeling.

<Modification 3>

Referring to Fig. 11, in the present modification, in the rear waist region 14, a concave inducing groove 95 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 in the vicinity of the opening of the pocket 30, or the inflow of the excrement in the pocket space S is made difficult by the extension portion 80 closing a part of the opening, it is discharged to the absorber. The soft stool on the 85 is induced into the pocket space S along the induction groove 95, so that the excrement can be accommodated and held in the pocket space S. In order to easily induce excretion into the pocket space S, the induction groove 95 is located in the rear waist region 14 It is preferable that the back waist elastic bodies 63, 64 between the side seams 19 extend from the position on the side of the crotch region 15 toward the rear waist region 14, and do not necessarily extend to the rear end edge of the absorbent body 85. Further, by making the absorber 85 thinner in the induction groove 95, the step difference between the lower end portion of the pocket forming portion 20 located above it becomes smaller, whereby it can be said that the excrement can be more easily flowed in. In the pocket space S. In the present modification, the induction groove 95 is formed by compressing or removing the portion of the absorber 85, and is thinner and bottomed than the other portions, but the absorbing body 85 may be partially removed in a slit shape. Further, a plurality of induction grooves 95 having different lengths and widths may be formed at the upper end portion of the absorber 85.

<Modification 4>

Referring to Fig. 12, in the present modification, at least the central portion 41 of the strip-shaped region 23 is provided with a liquid-impermeable sheet 96 located above the bent portion 31 of the pocket forming portion 20. The liquid-impermeable sheet 96 is preferably formed of a moisture-permeable liquid-impermeable plastic film or a fiber nonwoven fabric, and is disposed between the inner sheet 61 and the outer sheet 62 forming the back waist sheet 60. By arranging the liquid-impermeable sheet 96 in the portion of the strip-shaped region 23, it is possible to effectively prevent the movement of the bodily fluid that has entered the strip-shaped region 23 from leaking to the outside without moving into the pocket space S toward the waist opening side. .

<Modification 5>

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 Pocket inner field 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 excrement from the pocket opening into the pocket space S.

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 has a continuous sheet may be a sleeve type in which both side edges of the front and rear waist regions 13 and 14 are not connected in advance, and the unfolded type diaper may be 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. Further, the present invention is not explicitly shown in the drawings, but includes an embodiment in which a plurality of characteristic structures shown in each modification are combined with each other.

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 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 Waist area, before the aforementioned A disposable diaper for the underarm region of the back waist region, characterized in that: the rear waist region has a band-shaped region extending in the lateral direction on the skin abutting surface side; and a pocket forming portion a pocket formed on the non-skin contact surface side and having a central portion in the lateral direction facing the strip-shaped region in the front-rear direction, wherein the pocket forming portion is fixed to the strip-shaped region. a fixing portion on both sides; a pocket inner region extending upward from a portion connected to the strip-shaped region between the two side fixing portions; and a pocket outer region passing through the bent portion extending in the lateral direction and the inner side of the pocket The front-rear direction is opposed to the crotch region side, and the band-shaped region is elastically expandable and contractible in the lateral direction, and the contraction ratio of the band-shaped region is smaller than the outer side of the pocket between the two-side fixing portions The shrinkage rate is greater.

The disposable diaper of the present invention disclosed in the above paragraph 0049 may include at least the embodiment described below.

(1) The pocket forming portion further has a pocket side region formed by both side portions of the inner and outer sides of the pocket, and the two sides of the pocket are bent toward the inner side of the lateral direction by contraction of the strip-shaped region .

(2) The band-shaped region and the pocket forming portion are located above the central portion of the rear waist region in the vertical direction.

(3) 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.

(4) The skin-contacting surface side of the portion of the strip-shaped region facing the front-rear direction of the inner side of the pocket is elastically stretched and disposed Sexual thin slices.

(5) Further, the liquid-impermeable sheet further extends from the upper end portion of the absorbent body to the bent portion, and further extends from the bent portion toward a lower end portion of the inner side of the pocket.

(6) Further having a liquid-impermeable sheet extending from the upper end portion of the absorbent body toward the bent portion, and the lateral dimension is larger than the lateral dimension of the opening of the pocket.

(7) Further comprising an absorbent body extending from the crotch region to the front and rear waist regions, wherein the absorbent body is formed with an inducing groove extending from the crotch region to the rear waist region.

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

10‧‧‧Disposable disposable diapers

14‧‧‧ Back waist

14b‧‧‧ outer edge

15‧‧‧胯下域

23‧‧‧ Banded domain

30‧‧ ‧ pocket

31‧‧‧Bends

33‧‧‧Bends

41‧‧‧The central part of the strip

41a‧‧‧The inner end of the central part of the strip (lower end)

41b‧‧‧The outer end of the central part of the strip (upper end)

42‧‧‧ pocket inner domain

43‧‧‧ Pocket outer domain

F‧‧‧From the direction of the body

W1‧‧‧Horizontal X dimensions

W2‧‧‧Horizontal X dimensions

Claims (9)

A disposable diaper having a vertical direction and a lateral direction intersecting with the front and rear direction in a wearing state, and having a non-skin contact 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 and a subgingival region between the front and rear waist regions, wherein the back waist region has a band-shaped region which is located on the side of the skin abutting surface toward the lateral direction And a pocket forming portion that is located on the non-skin contact surface side and has a pocket that faces the strip-shaped region in the front-rear direction at a central portion in the lateral direction, and the pocket forming portion has a fixed portion a fixing portion on both sides of the strip-shaped region; a pocket inner region extending upward from a portion connected to the strip-shaped region between the two side fixing portions; and a pocket outer region passing through a bent portion extending in the lateral direction The inner side of the pocket extends in the front-rear direction toward the side of the crotch region, and the strip-shaped region is elastically expandable and contractible in the lateral direction, and the contraction ratio of the strip-shaped region is larger than the aforementioned mouth Greater shrinkage outside the domain. The disposable diaper according to claim 1, wherein the pocket forming portion further has two sides of the pocket formed by both side portions of the inner and outer sides of the pocket, and the two sides of the pocket are borrowed The contraction of the band-like region is bent toward the inner side of the lateral direction. The disposable diaper according to the first or second aspect of the invention, wherein the band-shaped region and the pocket forming portion are located above the central portion of the rear waist region in the vertical direction. The disposable diaper according to the first or second 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 the first or second aspect of the invention, wherein the pocket inner region of the band-shaped region is elastically disposed on the skin contact surface side of the portion facing the front-rear direction A stretchable sheet. A disposable diaper according to claim 1 or 2, further comprising a liquid-impermeable sheet extending from an upper end portion of the absorbent body to the bent portion, and further from the aforementioned bend The folded portion extends toward a lower end portion of the inner side of the pocket. The disposable diaper according to claim 1 or 2, further comprising a liquid-impermeable sheet extending from an upper end portion of the absorbent body toward the bent portion, and the lateral dimension The aforementioned lateral dimension of the opening of the aforementioned pocket is larger. The disposable diaper according to claim 1 or 2, further comprising an absorber extending from the crotch region to the front and rear waist regions, wherein the absorber is formed from the abbreviated field An induced groove extending toward the aforementioned posterior lumbar region. The disposable diaper according to the first or second aspect of the invention, wherein the strip-shaped region has upper and lower end portions opposed to each other in the vertical direction, and the contraction force of the lower end portion is formed by comparison with the other Part of the contraction force is high.