JP6911515B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article in which a groove is formed on the skin surface side of the absorber.

Conventionally, absorbent articles such as disposable diapers and sanitary napkins have been known. The absorbent article is provided with an absorber that absorbs a liquid such as urine or menstrual blood excreted from the wearer. By enhancing the breathability and liquid absorption of this absorber, the comfort of the wearer can be improved.
Therefore, a groove is formed on the skin surface side of the absorber, and the groove enhances the air permeability and diffuses the liquid excreted from the wearer over the entire area of the absorber to enhance the liquid absorbency (the liquid absorbency is enhanced). For example, see Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-198113

In such an absorber, not only liquids such as urine and menstrual blood but also moist loose stools spread through the groove, which may impair the comfort of the wearer. In particular, when loose stool spreads to the urination part of the wearer, the comfort of the wearer may be significantly impaired.

The present invention has been devised in view of the above problems, and an object of the present invention is to provide an absorbent article capable of suppressing the deterioration of the comfort of the wearer.

The absorbent article disclosed here includes an absorber in which a groove recessed in the thickness direction and a plurality of regions surrounded by the groove are formed on the absorption surface side for absorbing the liquid. In each of the regions of the absorber, on the opposite side of the groove, which is in contact with the groove in a plan view and is formed linearly and seamlessly along the groove, the thickness is larger than that of the edge. A recess recessed in the direction is formed. The recess includes an inclined portion connected to the edge portion and a bottom portion smoothly connected to the inclined portion.

According to the present invention, since a recess is formed on the side of the edge in contact with the groove opposite to the groove, the recess can hold loose stool and prevent the loose stool from entering the groove and diffusing, and can be worn. It is possible to prevent the person's comfort from being impaired.

It is a development view of the paper diaper (absorbent article) illustrated in one Embodiment. FIG. 1 is a cross-sectional view taken along the line AA of FIG. In FIG. 2, the thickness of each sheet is exaggerated to make it easier to understand each configuration. (A) is a cross-sectional view taken along the line CC of FIG. 1 showing the absorber and the center sheet extracted, and (b) is a view taken along the line D of FIG. 1 (a). In FIG. 3A, the thickness of the absorber and the thickness of the center sheet are exaggerated to make it easier to grasp each configuration. It is a schematic diagram which shows the structure of the modification, and is the perspective sectional view corresponding to FIG. 3A.

Hereinafter, a mode for carrying out this case will be described. The following embodiments are merely examples, and there is no intention to exclude the application of various modifications and techniques not specified in this embodiment. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed and can be combined as appropriate.

The absorbent article described in the embodiment is a hygienic product that is worn by the wearer and absorbs and retains liquid water such as urine and menstrual blood excreted from the wearer. This absorbent article includes absorbent articles with absorbers such as tape-type and pants-type paper diapers (so-called "disposable diapers"), as well as absorbents with only absorbers such as urine pads, sanitary napkins, and panty liners. Sexual goods are also included. In the following embodiments, pants-type disposable diapers are illustrated as absorbent articles.

In the present embodiment, the longitudinal direction of the disposable diaper is the direction connecting the front body arranged to face the abdomen of the wearer and the back body arranged to face the back. Between these front and back bodies (center in the longitudinal direction), the inseam, which is placed in the inseam of the wearer (placed facing the crotch), is located.
In addition, when the disposable diaper is worn on the wearer (hereinafter abbreviated as "wearing state"), the side facing the wearer's skin (inside) is defined as the skin surface side (absorbing surface side that absorbs liquid). The opposite side (outside) of the side is the non-skin side. Further, the direction connecting the skin surface side and the non-skin surface side is the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is the width direction. In addition, viewing from the thickness direction is defined as a plan view.
Further, regarding the absorber, the longitudinal direction, the thickness direction and the width direction shall follow this.

[1. Composition of disposable diapers]
[1-1. Basic configuration]
First, the basic configuration of the disposable diaper 1 will be described with reference to FIGS. 1 and 2.
Here, the disposable diapers 1 are formed symmetrically with respect to the center line CL in the width direction. The disposable diaper 1 is roughly divided into three regions along the longitudinal direction: a front body 1A, an inseam 1B, and a back body 1C.

<Sheets>
First, the sheets of the disposable diaper 1 will be described.
As shown in FIG. 1, the disposable diaper 1 contains an absorber 10 (indicated by a thick broken line) extending in the longitudinal direction over the front body 1A, the inseam 1B, and the back body 1C. Here, an hourglass-shaped absorber 10 having a smaller width direction in the inseam 1B than the front body 1A and the back body 1C is illustrated.

The absorber 10 is a mat-like member having water absorption that absorbs and retains liquid water (hereinafter referred to as "excreted water") such as urine and menstrual blood excreted from the wearer. The absorber 10 is formed by covering an absorbent mat in which a highly water-absorbent resin is mixed with crushed or defibrated pulp with an upper core wrap 10a and a lower core wrap 10b made of a liquid-permeable sheet such as tissue paper or non-woven fabric. It is wrapped. Hereinafter, a mixture of pulp and a highly water-absorbent resin is referred to as an "absorbent material".

As shown in FIG. 2, various sheets 11, 12, 13, and 14 described below are provided on the skin surface side and the non-skin surface side with respect to the above-mentioned absorber 10.
The center sheet 11 is laminated on the skin surface side of the absorber 10, and the back sheet 12 is laminated on the non-skin surface side. Side seats 13 are arranged on the lateral sides of these seats 11 and 12 in the width direction.
The side sheet 13 is laminated on the skin surface side in the width direction side portion of the center sheet 11, and is laminated on the non-skin surface side in the width direction side portion of the back sheet 12.
The cover sheet 14 is laminated on the non-skin surface side of the back sheet 12. Here, the cover sheet 14 is stacked on the side portion of the back sheet 12 in the width direction via the side sheet 13.

The center sheet 11 has water permeability because it allows the excreted water to permeate and is absorbed by the absorber 10. The center sheet 11 may also be breathable in order to suppress stuffiness in the mounted state. Further, the center sheet 11 is arranged on the skin surface side of the disposable diaper 1. The center sheet 11 has a larger width direction than the absorber 10 and covers the absorber 10 from the skin surface side.
The back sheet 12 is impermeable to prevent liquid leakage from the absorber 10. Here, in order to suppress stuffiness in the mounted state, a back sheet 12 having moisture permeability is used.
The side sheet 13 is impermeable to prevent liquid leakage in the lateral direction. Further, a part of the side sheet 13 is arranged on the skin surface side of the disposable diaper 1.

The cover sheet 14 covers the above-mentioned absorber 10 and sheets 11, 12, 13 from the non-skin surface side. As shown in FIG. 1, the cover sheet 14 in the front body 1A and the cover sheet 14 in the rear body 1C are attached to each other at the widthwise edge portions 14a in this way, so that the front body 1A and the back body 1A and the back body are attached to each other. The cover sheets 14 of 1C are joined to form a pants-shaped disposable diaper 1.

<gather>
Next, the gather 15 of the disposable diaper 1 will be described with reference to FIGS. 1 and 2.
The gather 15 is composed of a sheet composite having elasticity by sandwiching and fixing the member having elasticity between sheets in an extended state. As the gather 15, gathers 16, 17, and 18 are illustrated. One is a three-dimensional gather 16 in which the edge portion of the side sheet 13 on the skin surface side is wrinkled by the first thread rubber 21. The other is Tammy Gather 17, which is wrinkled with the second thread rubber 22 (a code is attached only to one place). The other is a second three-dimensional gather 18 (not shown in FIG. 1) in which the edge portion in the width direction is wrinkled by the third thread rubber 23 (not shown in FIG. 1) on the non-skin surface side of the side sheet 13. ..

The three-dimensional gather 16 is provided to prevent the excrement from leaking laterally in the width direction by enhancing the followability to the wearer at the periphery of the excrement portion. The Tammy Gather 17 is provided to enhance the followability of the wearer to the buttocks and lower abdomen. The second three-dimensional gather 18 is provided at the inseam 1B to improve the followability.

[1-2. Main part composition]
Next, with reference to FIGS. 1 to 3, the squeezing groove 41 (first groove) and the squeezing groove 42 (second groove) will be described as the main components of the disposable diaper 1.
<Squeezing groove>
The squeezing grooves 41 and 42 (grooves) are linearly extended in the absorber 10 and the center sheet 11 in order to improve the fit, water absorption and breathability of the disposable diaper 1 to the wearer. That is, the squeezing grooves 41 and 42 are linearly extended on the surface of the disposable diaper 1 on the skin surface side. Further, the squeezing grooves 41 and 42 are provided over substantially the entire absorber 10.
A plurality of squeezing grooves 41 extend in the first direction D1 and are provided in a plurality of second directions D2 different from the first direction D1 at predetermined intervals (equal intervals in the present embodiment) (only one place is designated with a reference numeral). ). The first direction D1 and the second direction D2 are inclined in opposite directions with respect to the longitudinal direction (here, the inclination angles are the same).
A plurality of squeezing grooves 42 extend in the second direction D2 and are provided in the first direction D1 at predetermined intervals (equal intervals in the present embodiment) (only one place is designated by a reference numeral). These squeezing grooves 41 and squeezing grooves 42 intersect in both the longitudinal direction and the width direction. That is, these squeezing grooves 41 and 42 form a grid shape (grid pattern) in a plan view.

The pressing grooves 41 and 42 are provided by press-molding the absorber 10 and the center sheet 11 in the thickness direction (lamination direction). Specifically, by pressing (compressing) the laminated absorber 10 and the center sheet 11 from the skin surface side in a convex shape having a predetermined shape (pattern), the pressed portion of the center sheet 11 in addition to the absorber 10 The air contained in the above is squeezed, and the squeezing grooves 41 and 42 in which the center sheet 11 is engaged and fixed to the absorber 10 are formed.

According to the above-mentioned squeezing grooves 41 and 42, the absorbent body 10 is dispersed by dispersing the liquid such as urine and menstrual blood excreted along the squeezing grooves 41 and 42 to disperse the water absorption points of the absorber 10. Can increase the water absorption of.
However, as described above in [Problems to be Solved by the Invention], when grooves such as squeezed grooves 41 and 42 are provided, not only liquids such as urine and menstrual blood but also loose stools with a large amount of water are formed. It may spread through.

Therefore, as shown in FIGS. 3 (a) and 3 (b), in the absorber 10 and the center sheet 11 (that is, the surface on the skin side of the disposable diaper), each region 40 such as a rhombus shape surrounded by the squeezing grooves 41 and 42 Each of the loose stool pockets 40p (recess) is provided. The loose stool pocket 40p accommodates the loose stool and suppresses the loose stool from entering the squeezing grooves 41 and 42, and suppresses the loose stool from diffusing through the squeezing grooves 41 and 42. In the present embodiment, the loose stool pocket 40p is provided in each region 40 of the absorber 10 and is formed shallower than the squeezing grooves 41 and 42. As a result, the internal volume of the loose stool pocket 40p is limited so that liquids such as urine and menstrual blood do not stay in the loose stool pocket 40p and do not prevent the liquid from flowing into the squeezing grooves 41 and 42. ..

More specifically, as shown in FIG. 3B, a peripheral portion 40s and a planar loose stool pocket 40p are formed in each region 40. The peripheral edge portion 40s includes an edge portion 40s1, 40s3 (first edge portion) in contact with the squeezing grooves 41, 41 in a plan view and an edge portion 40s2, 40s4 (second edge portion) in contact with the squeezing grooves 42, 42 in a plan view. It is composed of four edges.
The loose stool pocket 40p is provided on the side opposite to the squeezing grooves 41 and 42 of the peripheral edge portion 40 (that is, the central portion surrounded by the peripheral edge portion 40) in a plan view, and is recessed in the thickness direction from the peripheral edge portion 40s. In other words, in a plan view, a loose stool pocket 40p recessed from the edges 40s1 to 40s4 is provided as a single recess at a position opposite to the squeezing grooves 41 and 42 of the edges 40s1 to 40s4. ing.

As shown in FIGS. 3A and 3B, the loose stool pocket 40p is formed by smoothly connecting the inclined portion 40p1 and the bottom portion 40p2. The inclined portion 40p1 is continuously provided with the peripheral edge portion 40s at the upper end thereof, is inclined downward toward the inside (center) of the region 40, and is continuously provided with the bottom portion 40p2 at the lower end thereof. The bottom portion 40p2 is a substantially flat horizontal surface and forms the bottom surface of the loose stool pocket 40p.

Further, the loose stool pocket 40p is formed as a low basis weight region (with a low basis weight) of the absorber 10 as compared with the peripheral portion 40s. The "Metsuke amount" is the weight per unit area of the absorbent material forming the absorber 10, and is also a parameter corresponding to the thickness or the degree of lamination of the absorber 10. For example, the number of grams per square meter is used as the "weight".
By making the loose stool pocket 40p a low basis weight region, the thickness of the absorber 10 is reduced, the density of the absorbent material is slightly lowered, and the space where water can be retained can be slightly increased, and the water absorption performance is improved. It becomes possible to make it. As a result, more water in the loose stool in the loose stool pocket 40p is absorbed, the fluidity of the loose stool is reduced, and the loose stool is easily held in the loose stool pocket 40p.

[2. Action / effect]
According to the present embodiment, since it is configured as described above, the following actions and effects can be obtained.
(1) On the opposite side (inside of the peripheral edge 40s) of the squeezing grooves 41 and 42 of the edge portions 40s1 to 40s4 (peripheral portion 40s), a loose stool pocket 40p recessed in the thickness direction from the edge portions 40s1 to 40s4 is formed. ing. Liquids such as urine and menstrual blood pass through the loose stool pocket 40p and enter the squeezing grooves 41 and 42 from the space inside the loose stool pocket 40p. It can be absorbed over a wide range of body 10. On the other hand, loose stool has lower fluidity than liquids such as urine and menstrual blood, so loose stool that has entered the space inside the loose stool pocket 40p cannot get over the peripheral portion 40s and enters the loose stool pocket 40p. It is easy to hold and can prevent it from entering the squeezing grooves 41 and 42 and diffusing.
Therefore, it is possible to prevent the wearer's comfort from being impaired.

(2) Since the squeezing groove 41 and the squeezing groove 42 intersect in both the longitudinal direction and the width direction, and the loose stool pocket 40p is provided in the center of the region 40 surrounded by these squeezing grooves 41 and 42, the loose stool pocket 40p is provided. The loose stool pocket 40p makes it possible to hold a large amount of loose stool.

(3) Further, since the loose stool pocket 40p is a thin portion of the absorbent body 10, if it is a low basis weight region, it is possible to mold the absorbent mat in the mat molding step without providing a special thinning step. The loose stool pocket 40p can be molded as a thin-walled portion.
Further, by setting the loose stool pocket 40p as a low basis weight region, it is possible to effectively absorb the moisture of the loose stool in the loose stool pocket 40p and reduce the fluidity of the loose stool, and the performance of holding the loose stool by the loose stool pocket 40p can be improved. Can be improved. Therefore, it is possible to more effectively prevent loose stool from entering and diffusing into the squeezing grooves 41 and 42 and impairing the comfort of the wearer.

[3. Modification example]
(1) In the above embodiment, the loose stool pocket 40p is provided in each region 40, but the loose stool pocket 40p may be provided in at least one region 40.
Further, it is preferable that the loose stool pocket 40p is arranged so as to be at least located between the defecation part where the wearer defecates and the urination part where the wearer urinates when worn by the wearer. As a result, it is possible to reliably suppress the diffusion of loose stool into the urinary part, which impairs the comfort of the wearer.
Further, even if the loose stool pockets 40p are provided in the absorber 10 as a whole, every other loose stool pocket 40p may be provided in the region 40.

(2) The shape of the peripheral portion 40s and the loose stool pocket 40p and the depth of the loose stool pocket 40p are not limited to those of the above embodiment and can be set as appropriate. For example, in the above embodiment, the loose stool pocket 40p is formed by connecting the inclined portion 40p1 and the flat bottom portion 40p2, but it may be formed by one continuous curved surface (for example, a curved surface such as a concave mirror). .. Further, the peripheral edge portion 40s may be a flat surface having a constant width.

Alternatively, in the region 40, the loose stool pocket 40p may be provided along the peripheral edge portion 40s only in the portion in contact with the peripheral edge portion 40s. Also in this case, the loose stool pocket 40p is not limited to be provided over the entire circumference of the peripheral edge portion 40s, and at least one of the peripheral edges 40s1, 40s2, 40s3, 40s4 [see FIG. 3B]. A loose stool pocket 40p may be provided at a portion in contact with the two edges.

(3) The number of squeezing grooves, the extending direction, and the forming pattern are not limited to the above embodiments. For example, only the squeezing groove 41 extending in the first direction D1 may be provided, or only the squeezing groove 42 extending in the second direction D2 may be provided. For example, when only the squeezing groove 41 is provided, as shown in FIG. 4, a configuration in which the loose stool pocket 40p is extended in the first direction D1 is exemplified on the side opposite to the squeezing groove 41 of the edge portion 40s in contact with the squeezing groove 41. can.

(4) In the above embodiment, the groove for diffusing a liquid such as urine or menstrual blood is a press-molded squeeze groove, but the groove is not limited to the squeeze groove. Grooves may be formed in the absorbent mat at the time of molding the absorbent mat by using a mold having a shape for the groove.

1 Paper diapers (absorbent articles)
1A Front body 1B Inseam 1C Back body 10 Absorber 40 Area 40p Loose stool pocket (recess)
40p1 Inclined part 40p2 Bottom part 40s Peripheral part of area 40 40s1, 40s3 Edge part of area 40 (first edge part)
40s2, 40s4 Edge of region 40 (second edge)
41 Squeezing groove (groove, first groove)
42 Squeezing groove (groove, second groove)
D1 1st direction D2 2nd direction

Claims (6)

A groove recessed in the thickness direction and a plurality of regions surrounded by the groove are provided with an absorber formed on the absorption surface side for absorbing the liquid.
In each of the regions of the absorber, on the opposite side of the groove, which is in contact with the groove in a plan view and is formed linearly and seamlessly along the groove, the edge is more than the edge. A concave recess is formed in the thickness direction,
An absorbent article, characterized in that the recess is provided with an inclined portion connected to the edge portion and a bottom portion smoothly connected to the inclined portion. As the groove, a first groove extending in the first direction is formed.
The absorbent article according to claim 1, wherein the recess is formed on the opposite side of the first edge portion, which is the edge portion in contact with the first groove, to the first groove. As the groove, a second groove extending in a second direction different from the first direction is further provided.
The absorbent article according to claim 2, wherein the recess is formed on the side opposite to the second groove of the second edge portion which is the edge portion in contact with the second groove. A plurality of the first grooves are arranged in the second direction at predetermined intervals.
A plurality of the second grooves are arranged in the first direction at predetermined intervals.
The first groove and the second groove intersect in both the longitudinal direction and the width direction, and
The absorbent article according to claim 3, wherein the recess is formed in a central portion of a region surrounded by the plurality of first grooves and the plurality of second grooves. Claims 1 to 4, wherein the recess is arranged so as to be at least located between the urination part where the wearer defecates and the urination part where the wearer urinates when worn by the wearer. The absorbent article according to any one of the above. The absorbent article according to any one of claims 1 to 5, wherein the concave portion is a low basis weight region having a lower basis weight than the edge portion.

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