WO2014084087A1

WO2014084087A1 - Absorptive pad

Info

Publication number: WO2014084087A1
Application number: PCT/JP2013/081102
Authority: WO
Inventors: 伊藤　英和; 前田　勝司; 鈴木　陽一
Original assignee: 花王株式会社
Priority date: 2012-11-29
Filing date: 2013-11-19
Publication date: 2014-06-05

Abstract

An upper layer (5) and a lower layer (6) are each provided with a central absorption body (7) and a pair of side absorption bodies (8), and grooves (9A, 9B) are provided in each of the layers (5, 6) at positions between the central absorption body (7) and each of the pair of side absorption bodies (8) such that the grooves (9A, 9B) penetrate through the layer (5, 6) in the thickness direction thereof. The grooves (9A) in the upper layer (5) do not overlap the absorption bodies (7, 8) of the lower layer (6) but overlap the grooves (9B) in the lower layer (6). The grooves (9A) in the upper layer (5) have rectilinear sections (92) which, in a plan view, extend in the longitudinal direction (X) in a crotch section (M), and the grooves (9A) also have bent sections (94) which, in the plan view, extend forward in the longitudinal direction (X) and outward in the lateral direction (Y) from the longitudinal front ends (92a) of the rectilinear sections (92).

Description

Absorbent pad

The present invention relates to an absorbent pad (inner) that is used in an overlapping manner with an absorbent article (outer) such as a disposable diaper.

Conventionally, for the purpose of reducing the economical and labor burden associated with the treatment of excrement such as urine, an absorbent pad is used in combination with an absorbent article such as a disposable diaper. For example, a urine-absorbing pad, which is a type of absorbent pad, is placed on the surface sheet of disposable diapers worn by adults (mostly elderly people) whose physical functions have been weakened or weakened by disease, and have incontinence of urinary urine. When used to absorb and hold, when the amount of excreted urine is relatively small, only the urine collecting pad needs to be replaced, and the frequency of replacement of the disposable diaper can be reduced.

Also, in absorbent pads and absorbent articles, from the viewpoint of improving fit and leakproof properties, grooves that penetrate the absorbent body in the thickness direction are formed in the absorbent body. For example, Patent Document 1 describes that, in an absorbent pad including an absorber having a two-layer structure of an upper layer absorber and a lower layer absorber, a lower layer slit penetrating the front and back surfaces is formed in the lower layer absorber. ing. This lower layer slit is opened at both side edges along the longitudinal direction of the rear part of the lower layer absorbent body (the part disposed on the back side of the wearer in the lower layer absorbent body), and has an open end at both side edge parts. And has a linear part extending in the vertical direction at the crotch part (a part of the lower layer absorbent body facing the crotch of the wearer), and the open end part and the linear part are connected to each other. . According to Patent Document 1, the effect of lower layer slits is that the absorption speed is improved by securing a diffusion path of urine and the effect of preventing leakage of urine is mentioned (see description of [0047] in Patent Document 1) ).

Further, Patent Document 2 describes that in an absorbent pad having an absorber having a two-layer structure of an upper layer and a lower layer, an easy-bending portion made of a slit is formed in the lower layer. The easy-to-bend portion is a linear crotch portion easy-bend portion 3y positioned in the crotch portion (vertical center portion) and extending in the vertical direction, and a linear shape extending in the lateral direction and positioned on the ventral side of the crotch portion It consists of the ventral side easy bending part 3x, and both the easy bending parts 3x and 3y are connected. According to Patent Document 2, as an effect of the easy folding portions 3x and 3y, an improvement in fit is given by appropriately folding the absorbent pad at both easy folding portions 3x and 3y during wearing (Patent Literature). (See description of [0042] to [0047] and [0052] in 2).

Further, in Patent Document 3, an absorbent article having an absorbent body having a two-layer structure of an upper layer and a lower layer is provided with a slit penetrating these layers in the thickness direction, and the absorbent body is separated from the center and both sides by the slit. It is described that it is divided into parts. The slits are positioned at the narrow portion of the absorber and extend in the front-rear direction (longitudinal direction), a pair of front-rear slits, the front slit reaching the side edge of the absorber from the front end of the front-rear slit, and the front-rear slit A rear slit that reaches the side edge of the absorber from the rear end side, and the front slit extends in a direction (lateral direction) orthogonal to the front-rear direction. According to Patent Document 3, since the absorber is divided by the slits, it is difficult for the absorber to be squeezed or cracked, and the leakage of urine is improved (Patent Document 3 [Claims]. 1], [0041] and [0044].

JP 2012-10951 A Japanese Unexamined Patent Publication No. 2009-219826 JP 2012-115464 A

The present invention comprises a main body comprising a top sheet that forms a skin-facing surface, a back sheet that forms a non-skin-facing surface, and an absorbent body interposed between both sheets, and a longitudinal direction corresponding to the front-rear direction of the wearer; An absorbent pad having a lateral direction perpendicular thereto. The absorbent body is disposed on the crotch part that is disposed opposite to the crotch of the wearer when worn, a front part that is disposed on the abdomen side of the wearer from the crotch part, and a back side of the wearer than the crotch part. And a laminated structure including an upper layer and a lower layer disposed on the non-skin facing surface side of the upper layer. Each of the upper layer and the lower layer includes a central absorber and a pair of side absorbers provided on both sides of the central absorber, and each of the central absorber and the pair of side absorbers. And a groove penetrating the layer in the thickness direction. The groove on the upper layer overlaps the groove on the lower layer without overlapping the central absorber and the side absorber on the lower layer. The groove in the upper layer has a linear portion extending in the vertical direction at the crotch portion in plan view, and a bent portion extending in the vertical direction forward and laterally outward from the vertical front end of the linear portion. Have.

Moreover, this invention (1st invention) is equipped with the main body which comprises the top sheet | seat which forms a skin opposing surface, the back surface sheet | seat which forms a non-skin opposing surface, and the absorber interposed between both sheets, and wearer's front and back The absorbent pad has a longitudinal direction corresponding to a direction and a transverse direction perpendicular thereto. The absorbent body is disposed on the crotch part that is disposed opposite to the crotch of the wearer when worn, a front part that is disposed on the abdomen side of the wearer from the crotch part, and a back side of the wearer than the crotch part. And a laminated structure including an upper layer and a lower layer disposed on the non-skin facing surface side of the upper layer. Each of the upper layer and the lower layer includes a central absorber and a pair of side absorbers provided on both sides of the central absorber, and each of the central absorber and the pair of side absorbers. And a groove penetrating the layer in the thickness direction. At least one of the groove in the upper layer and the groove in the lower layer has a closed end without being opened to the peripheral edge of the absorber. The groove on the upper layer overlaps the groove on the lower layer without overlapping the central absorber and the side absorber on the lower layer. The groove in the upper layer has a linear portion extending in the vertical direction at the crotch portion in plan view, and a bent portion extending in the vertical direction forward and laterally outward from the vertical front end of the linear portion. Have.

Moreover, this invention (2nd invention) is equipped with the main body which comprises the surface sheet which forms a skin opposing surface, the back surface sheet which forms a non-skin opposing surface, and the absorber interposed between both sheets, and wearer's front and back The absorbent pad has a longitudinal direction corresponding to a direction and a transverse direction perpendicular thereto. The absorbent body is disposed on the crotch part that is disposed opposite to the crotch of the wearer when worn, a front part that is disposed on the abdomen side of the wearer from the crotch part, and a back side of the wearer than the crotch part. And a laminated structure including an upper layer and a lower layer disposed on the non-skin facing surface side of the upper layer. An intermediate sheet is interposed between the upper layer and the lower layer, and both these layers and the intermediate sheet are joined. Each of the upper layer and the lower layer includes a central absorbent body and a pair of side absorbent bodies that are connected to each other at the crotch part or the rear part of the central absorbent body and provided on both sides of the central absorbent body. And a groove penetrating the layer in the thickness direction is provided between the central absorber and each of the pair of side absorbers. The groove in the upper layer and the groove in the lower layer substantially overlap each other in plan view of the absorber, and the overlapping portion of both grooves is open to both side edges along the longitudinal direction of the front portion. The both side edges have open ends, and the crotch has a linear portion extending in the vertical direction, and the open end and the linear portion are connected.

FIG. 1 schematically shows the skin-facing surface side (surface sheet side) of the absorbent pad in an expanded state, in which each part of an embodiment of the absorbent pad of the present invention (first invention) is expanded and expanded in a planar shape. FIG. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. Fig.3 (a) is a top view which shows typically the upper layer of the absorber in the absorptive pad shown in FIG. 1, FIG.3 (b) is a top view which shows typically the lower layer of this absorber. FIG. 4 is a cross-sectional view schematically showing how the absorbent pad shown in FIG. 1 is used, and is a view corresponding to FIG. 2 showing a state in which the absorbent pad is disposed on the skin facing surface side of the disposable diaper. FIG. 5 is a cross-sectional view schematically showing a wearing state of the absorbent pad shown in FIG. 6 (a) to 6 (c) are views for explaining the state of the absorbent body when the absorbent pad is worn, and FIG. 6 (a) is an absorption according to the present invention (first invention). 6 (b) and FIG. 6 (c) both show an absorbent body outside the scope of the present invention (first invention). FIGS. 7 (a) to 7 (c) are diagrams for explaining the relationship between the overlapping portion of the groove in the absorbent body and the wearer's ridge, and FIG. 7 (b) and FIG. 7 (c) both show the main part of the absorber outside the scope of the present invention (first invention). FIGS. 8 (a) to 8 (c) are plan views schematically showing the main part of another embodiment of the absorbent body according to the present invention (first invention).

FIG. 9 is a schematic view of the skin-facing surface side (surface sheet side) of the absorbent pad in an expanded state, in which each part of an embodiment of the absorbent pad of the present invention (second invention) is expanded and expanded in a planar shape. FIG. 10 is a cross-sectional view schematically showing a cross section taken along line II of FIG. Fig.11 (a) is a top view which shows typically the upper layer of the absorber in the absorptive pad shown in FIG. 9, FIG.11 (b) is a top view which shows typically the lower layer of this absorber. FIG. 12 is a cross-sectional view schematically showing how the absorbent pad shown in FIG. 9 is used, and is a view corresponding to FIG. 10 showing a state in which the absorbent pad is disposed on the skin facing surface side of the disposable diaper. 13 is a cross-sectional view schematically showing a wearing state of the absorbent pad shown in FIG. 14 (a) to 14 (c) are diagrams for explaining the state of the absorbent body when the absorbent pad is worn, and FIG. 14 (a) is an absorption according to the present invention (second invention). 14 (b) and FIG. 14 (c) both show an absorber outside the scope of the present invention (second invention).

In recent years, when wearing absorbent articles such as disposable diapers while sleeping at night, the viewpoint of allowing the wearer to sleep, and the viewpoint of reducing the labor of those who perform replacement work of the absorbent articles (caregivers, etc.) Therefore, there is a demand for an absorbent pad having a high absorption capacity that exhibits stable absorption performance over a long period of time and can be worn continuously. In order to make the absorbent pad have a high absorption capacity, it is effective to increase the size in the vertical direction and the horizontal direction, but such a large absorbent pad is difficult to apply to the wearer's crotch. It is difficult to follow the wearer's body, and a gap may be formed between the wearer's skin and the wearer's skin during wearing, and there is room for improvement in wear feeling and leakage prevention. Thus, in an absorptive pad, coexistence with a favorable wearing feeling, the ease of contact, and absorption performance is a subject.

The absorbent pads or disposable diapers described in Patent Documents 1 to 3 are worn as compared with the conventional products because the grooves (slits, separation parts) penetrating the absorbent body in the thickness direction are formed as described above. Although certain improvements are observed in various characteristics such as feeling and absorption performance, there is room for improvement. There has not yet been provided an absorbent pad that achieves both ease of application to the wearer's crotch and a feeling of wear and absorption performance.

The present invention relates to an absorbent pad that is easily applied to the wearer's crotch, has a good wearing feeling, and has excellent absorption performance.

Hereinafter, the absorbent pad of the present invention (first invention) will be described with reference to the drawings based on a preferred embodiment thereof. As shown in FIGS. 1 and 2, the absorbent pad 1 of the present embodiment is interposed between a top sheet 2 that forms a skin facing surface, a back sheet 3 that forms a non-skin facing surface, and both

sheets

2 and 3. And a longitudinal direction X corresponding to the wearer's front-rear direction and a transverse direction Y orthogonal thereto.

In the present specification, the skin facing surface is a surface of the absorbent pad or its constituent members (for example, the absorbent body 4 and the main body 15) that is directed to the skin side of the wearer when the absorbent pad is worn. The facing surface is a surface of the absorbent pad or a component thereof directed to the side opposite to the skin side (clothing side) when the absorbent pad is worn. Moreover, the vertical direction X corresponds to the direction (longitudinal direction) along the long side of an absorptive pad or its component member, and the horizontal direction Y corresponds to the width direction of an absorptive pad or its component member.

The main body 15 (absorber 4) has a long shape in one direction (vertical direction X) in a plan view as shown in FIG. As shown in FIG. 2, the top sheet 2 that forms the skin facing surface of the main body 15 covers the entire area of the skin facing surface of the absorbent body 4, and the back sheet that forms the non-skin facing surface of the main body 15. 3 covers the whole area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction of the absorbent body 4 (both side edges along the longitudinal direction of the lower layer to be described later). ing. Moreover, both the

sheets

2 and 3 are respectively the front end (vertical direction edge part by the side of the front part F mentioned later) and rear end (vertical direction edge part by the side of the back part R mentioned later) of the longitudinal direction X of the absorber 4, respectively. Are extended to the outside in the longitudinal direction X, and are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal at the extended portions.

The absorbent body 4 that is one of the main characteristic portions of the present embodiment will be described. It has the front part F distribute | arranged to the side and the back part R distribute | arranged to a wearer's back side rather than this crotch part M in the vertical direction X. “At the time of wearing” here means a state in which a normal appropriate wearing position (correct wearing position of the absorbent pad) is maintained, and includes when the absorbent pad is deviated from the wearing position. Absent. The front part F, the crotch part M, and the rear part R are approximately 3 etc. in the longitudinal length X of the absorbent body 4 in an expanded state in which each part of the absorbent pad is extended to expand the absorbent pad in a planar shape. Each area is divided into three areas as shown. The absorber 4 and each of the top sheet 2 and the back sheet 3 are joined by an adhesive.

The absorber 4 includes a laminated structure (two-layer structure) composed of an upper layer 5 and a lower layer 6 disposed on the non-skin facing surface side of the upper layer 5. As shown in FIG. 2, the upper layer 5 covers the entire upper absorbent core 50 mainly composed of a water-absorbing material and at least the skin-facing surface (facing the surface sheet 2) of the upper absorbent core 50. One lower layer core wrap sheet 51 is included, and the lower layer 6 is also composed of a lower layer absorbent core 60 mainly composed of a water-absorbing material, and at least a skin-facing surface of the lower layer absorbent core 60 ( And a single lower core wrap sheet 61 that covers the entire area of the surface facing the upper layer 5. The skin-facing surface of the upper absorbent core 50 and the upper-layer core wrap sheet 51 are joined by an adhesive, and the skin-facing surface and the non-skin-facing surface of the lower absorbent core 60 are also bonded to the lower-layer core wrap sheet 61. It is joined by the agent.

Since the upper layer 5 and the lower layer 6 are configured in this manner, the other absorbent core that extends outward in the vertical direction X from the end in the vertical direction X of one of the upper and

lower layers

5, 6. In the longitudinally extending portion, the entire areas of the skin facing surface and the non-skin facing surface are covered with the

core wrap sheets

51 and 61, so that the absorbent material from the longitudinally extending portion of the other absorbent core Movement, in particular, movement of the water-absorbing polymer to the top sheet 2 side or the back sheet 3 side is effectively prevented. When the water-absorbing polymer in the absorbent core moves to the surface sheet 2 side, the water-absorbing polymer is applied to the skin of the wearer when the particle size of the water-absorbing polymer is smaller than the interfiber space such as the nonwoven fabric constituting the surface sheet 2. May cause skin problems. Moreover, if the water-absorbing polymer in the absorbent core moves (drops) to the back sheet 3 side, it may cause holes in the back sheet 3 and lead to leakage. Further, in the present embodiment, as will be described later, when the intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, particularly when lifting the longitudinal end portion for mounting the absorbent pad 1, If the length of the intermediate sheet 10 in the longitudinal direction X is short, for example, when the pad 1 is reapplied several times, the absorption extends to the outside in the longitudinal direction X from the longitudinal end of the intermediate sheet 10. There is a possibility that the shape of the longitudinally extending portion of the conductive core may collapse and approach the longitudinally central portion. The above inconvenience is effectively prevented by the upper layer 5 and the lower layer 6 being configured as described above, and as a result, good fit of the absorbent pad 1 is maintained.

The length (width) in the lateral direction Y of the upper layer core wrap sheet 51 is substantially the same as or wider than the crotch part M in the upper layer absorbent core 50. On the other hand, the length (width) in the lateral direction Y of the lower layer core wrap sheet 61 is at least twice the maximum width of the portion of the lower layer absorbent core 60 where the length (width) in the lateral direction Y is the longest. The lower layer core wrap sheet 61 covers the whole area of the skin facing surface of the lower layer absorbent core 60 and the non-skin facing surface on the opposite side thereof. The lower layer 6 has the lower layer absorbent core 60 placed on the central portion in the lateral direction Y of this one lower layer core wrap sheet 61, and both sides in the lateral direction Y are folded back to the upper surface side of the lower layer absorbent core 60. The lower side core wrap sheet 61 is formed into a cylindrical shape by joining the edge portions on both sides by a known joining means such as a hot melt adhesive.

As shown in FIG. 2, an intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, and both the

layers

5 and 6 and the intermediate sheet 10 are joined by an adhesive. In the present embodiment, one intermediate sheet 10 is bonded to each of the upper absorbent core 50 and the lower core wrap sheet 61 with an adhesive. With such a configuration, the upper layer 5 and the lower layer 6 are connected to the intermediate sheet 10. It is integrated through. The length in the vertical direction X and the length (width) in the horizontal direction Y of the intermediate sheet 10 are substantially the same as the length in the vertical direction X and the length (width) in the horizontal direction Y of the upper core wrap sheet 51. The intermediate sheet 10 extends outward in the longitudinal direction X from the end in the longitudinal direction X (the longitudinal end on the front portion F side) of one of the upper layer 5 and the lower layer 6 (the lower layer 6 in this embodiment). The entire surface of one surface (the non-skin-facing surface of the upper absorbent core 50 in this embodiment) of the other (the upper layer 5 in this embodiment) longitudinally extending portion of the absorbent core is covered. By arranging the intermediate sheet 10 in this way, the above-described disadvantage caused by the movement of the absorbent material (water absorbent polymer) is effectively prevented.

As shown in FIGS. 1 to 3, the upper layer 5 (upper layer absorbent core 50) and the lower layer 6 (lower layer absorbent core 60) are provided on the central absorbent body 7 and on both sides of the central absorbent body 7, respectively. A pair of

side absorbers

8 and 8, and a groove 9 A that penetrates the

layers

5 and 6 in the thickness direction between the central absorber 7 and the pair of

side absorbers

8 and 8, respectively. 9B. Each of the

grooves

9A and 9B is linear in a plan view of the absorber 4 as shown in FIG.

In the present embodiment, the central absorbent body 7 of each of the upper layer 5 and the lower layer 6 has a lateral direction as it goes from the front part F to the crotch part M in a region extending from the front part F to the crotch part M as shown in FIG. A portion having a substantially planar isosceles trapezoidal shape portion 70 in which the length (width) of Y gradually decreases and a planar view belt-like portion 71 having a constant width, and a relatively short width in the isosceles trapezoidal shape portion 70 The strip portions 71 are connected to each other to form both

portions

70 and 71 integrally. Further, the pair of side

absorbent bodies

8 and 8 of each of the upper layer 5 and the lower layer 6 sandwich the central absorbent body 7 so as to be along the side edges along the longitudinal direction X of both

portions

70 and 71 of the central absorbent body 7. The two

absorbers

7 and 8 are integrally formed so as to be connected to the central absorber 7 at the crotch part M.

Since the shape of the central absorbent body 7 and the side absorbent body 8 in the upper layer 5 and the lower layer 6 in a plan view is such a specific shape, when the absorbent pad 1 is worn, the front side sock is removed from the crotch of the wearer. The absorbent body 4 is easily bent along the portion, and the absorbent body 4 is more likely to hit the wearer's body. As a result, the absorbent body 4 always comes into contact with the urination part of the wearer without wrinkles or twists, so that the absorbent body 4 can stably exhibit the absorption performance, and the absorbent body 4 along the body. Therefore, for example, when irregularities (mountains and valleys) are intentionally formed in the absorbent body, there is no sense of discomfort that may be given to the wearer, and the mounting performance of the absorbent pad 1 is improved.

From the viewpoint of facilitating deformation of the front part F and the central absorbent body 7 of the absorbent body 4 along the wearer's body and improving the feeling of wear and leakage prevention, the upper layer 5 (upper absorbent core 50) and the lower layer 6 One of the lower layer absorbent cores 60 preferably extends outward in the longitudinal direction X from the longitudinal end on the front portion F side of the other. In this embodiment, as shown in FIGS. 1 and 3, the upper layer 5 (upper absorbent core 50) extends from the longitudinal end 6 f on the front portion F side in the lower layer 6 (lower absorbent core 60) in the longitudinal direction X. It extends outside. The extension length 5LE (see FIG. 1) of the upper layer 5 from the longitudinal end 6f of the lower layer 6 is preferably 20 mm or more, more preferably 40 mm or more, and preferably 120 mm or less, more preferably 100 mm or less, more specifically. Specifically, it is preferably 20 mm or more and 120 mm or less, more preferably 40 mm or more and 100 mm or less.

Moreover, in this embodiment, as shown in FIG.1 and FIG.3, the dimension in planar view of the lower layer 6 (lower layer absorbent core 60) is made smaller than this dimension of the upper layer 5 (upper layer absorbent core 50). More specifically, the lower layer 6 is made shorter than the upper layer 5 at least in the longitudinal direction X. One of the main roles of the lower layer 6 is to absorb and hold body fluids such as urine excreted from the excretion part of the wearer in the excretion part facing part and the peripheral part of the absorbent pad 1 facing the excretion part. In consideration of the role of the lower layer 6, the upper layer 5 and the lower layer 6 do not necessarily have the same shape and dimensions, and the lower layer 6 is sufficiently smaller than the upper layer 5 as in the present embodiment. It is. In that case, it is preferable that the lower layer 6 having a smaller dimension in plan view than the upper layer 5 is disposed at least in the excretory part facing part and its peripheral part. The “peripheral part of the excretory part facing part” is preferably a part closer to the rear part R than the excretion part facing part, and more preferably a part within 50 mm rearward from the excretion part facing part. . The said excretion part opposing part exists in the site | part biased to the front part F side from the center part of the horizontal direction Y of the absorbent pad 1 and the center part of the vertical direction X normally.

The groove 9A of the upper layer 5 has a linear portion 92A extending in the longitudinal direction X in the crotch M as viewed in a plan view as shown in FIG. 3A, and extends in the longitudinal direction X from the longitudinal front end 92Aa of the linear portion 92A. It has a bent portion 94A that extends forward and outward in the lateral direction Y. Further, the groove 9B of the lower layer 6 has a linear portion 92B extending in the longitudinal direction X in the crotch portion M in a plan view as shown in FIG. 3B, and the longitudinal direction from the longitudinal front end 92Ba of the linear portion 92B. It has a bent portion 94B extending in front of X and outward in the lateral direction Y.

At least one of the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 is not open to the peripheral portion of the absorber 4 [the layer (the upper layer 5 or the lower layer 6) having the one groove (9A or 9B)]. It has a closed end. In the present embodiment, as shown in FIG. 3A, the groove 9A of the upper layer 5 is not open to the peripheral portion of the upper layer 5, but has closed end portions 93A at the front and rear ends in the length direction. 3B, the groove 9B of the lower layer 6 is not open to the peripheral edge of the lower layer 6, as shown in FIG. 3B, and has a closed end 93B at each of the front and rear ends in the length direction. is doing.

As shown in FIGS. 1 and 2, the groove 9A of the upper layer 5 does not overlap with the central absorber 7 and the side absorber 8 of the lower layer 6, but overlaps the groove 9B of the lower layer 6, thereby absorbing the groove 9A. The body 4 is formed with an overlapping portion 90 of both

grooves

9A and 9B. Thus, since the groove 9A of the upper layer 5 does not overlap the

absorbers

7 and 8 of the lower layer 6, but overlaps the groove 9B of the lower layer 6, the shape in plan view of the overlapping portion 90 of both

grooves

9A and 9B is The shape of the groove 9A is the same as that of the plan view. In the portion corresponding to the groove 9A of the upper layer 5 in the lower layer 6 (the portion overlapping the groove 9A in the plan view of the absorber 4 as shown in FIG. 1), the groove 9B (space portion) of the lower layer 6 exists. No forming material 6 (fiber material, water-absorbing polymer, etc.) exists.

In the present embodiment, the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 are similar in shape in plan view, and the groove 9B of the lower layer 6 is longer than the groove 9A of the upper layer 5 in length. And the width is large. That is, as shown in FIG. 1, the closed end portion 93B of the groove 9B on the bent portion 94B side is closer to the closed end portion 93A of the groove 9A on the bent portion 94A side. Therefore, the closed end portion 93B of the groove 9B on the linear portion 92B side is located on the outer side of the

bent portions

94A and 94B in the length direction, and the closed end portion 93B of the groove 9A on the linear portion 92A side is closed. From 93A, these

linear portions

92A and 92B are positioned outward in the length direction, and (the length of the groove 9A in the upper layer 5) <(the length of the groove 9B in the lower layer 6). Further, regarding the magnitude relationship between the widths 9WA and 9WB (see FIG. 3) of both the

grooves

9A and 9B, as shown in FIG. 2, opposite side walls 96 and 96 (centers in the lower layer 6) defining the groove 9B of the lower layer 6 The side portion along the longitudinal direction X of the absorbent body 7 and the inner side portion along the longitudinal direction of the side portion absorbent body 8 facing the side portion) correspond to the groove 9B (overlap with the groove 9B). From the opposing side walls 95 and 95 (the side part along the longitudinal direction X of the central absorber 7 in the upper layer 5 and the inner part along the longitudinal direction of the side absorbent body 8 facing the side part) that define the groove 9A. Is also located outward in the lateral direction Y, and (the width 9WA of the groove 9A of the upper layer 5) <(the width 9WB of the groove 9B of the lower layer 6).

Thus, in the present embodiment, the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 are similar to each other in shape in plan view, and the groove 9B of the lower layer 6 is in comparison with the groove 9A of the upper layer 5. Since the length and width are large, the shape of the overlapping portion 90 of the

grooves

9A and 9B in the plan view on the skin facing surface side (surface sheet 2 side) of the absorbent pad 1 as shown in FIG. The closed end portion 93 in the longitudinal direction of the overlapping portion 90 is the closed end portion 93A of the groove 9A, which is the same as that of the relatively small groove 9A.

Thus, when the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 are similar to each other, the absorbent pad 1 is bent at the

grooves

9A and 9B (overlapping portion 90) and deformed three-dimensionally. The

grooves

9A and 9B of the upper and

lower layers

5 and 6 are formed around the low-rigidity portion formed by overlapping the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 with higher rigidity than the low-rigidity portion. Since the buffer portion is formed, which is lower in rigidity than the overlapping portion (high rigidity portion) between the non-existing portions, the bent portion is formed by crushing or overlapping the

grooves

9A and 9B when the pad 1 is deformed. The curvature of the pad becomes smooth, the pad 1 becomes easier to follow along the wearer's body, and the feeling of strangeness is reduced.

The upper layer groove 9A, that is, the overlapping portion 90 between the upper layer 5 groove 9A and the lower layer 6 groove 9B is a linear portion 92 extending in the longitudinal direction X in the crotch portion M in the plan view of the absorber 4 as shown in FIG. And a bent portion 94 extending from the longitudinal front end 92a of the linear portion 92 to the front in the longitudinal direction X and outward in the lateral direction Y. The bent portion 94 extends in a direction intersecting both the vertical direction X and the horizontal direction Y. The bent portion 94 is shorter than the straight portion 92 (the length of the linear groove in the length direction). The linear portion 92 of the overlapping portion 90 is an overlapping portion of the linear portion 92A of the groove 9A and the linear portion 92B of the groove 9B, and the bent portion 94 of the overlapping portion 90 is the same as the bent portion 94A of the groove 9A. It consists of an overlapping part with the bent part 94B of the groove 9B.

Moreover, in this embodiment, as shown to FIG.1 and FIG.3 (a), the absorber 4 (upper layer 5) is the front side of the vertical direction X from the rear part R, More specifically, the front part F and The crotch portion M has a constricted portion 40 that is shorter in the lateral direction Y than in the longitudinal direction X. The side edge along the vertical direction X of the constricted portion 40 includes a straight side edge 4S1 extending along the vertical direction X, and a front side in the vertical direction X and a front side in the horizontal direction Y from the front end in the vertical direction X of the straight side edge 4S1. A bent side edge 4S2 extending outward is formed, and a bent portion of the overlapping portion 90 of the groove 9A and the groove 9B is on or near the extension line of the bent side edge 4S2 (within 80 mm from the extension line). 94 (the bent portion 94A of the groove 9A and the bent portion 94B of the groove 9B) exist. That is, the bent side edge 4S2 of the constricted portion 40 of the absorber 4 (upper layer 5) extends in the same direction as the bent portion 94 (a direction intersecting both the vertical direction X and the horizontal direction Y). On the other hand, as shown in FIG. 1 and FIG. 3B, the lower layer 6 has a rectangular shape in plan view and does not have a constricted portion, and both side edges of the lower layer 6 extend in the vertical direction over the entire length thereof. X and parallel.

The absorbent pad 1 of the present embodiment can be used by being disposed on the skin facing surface side of a disposable diaper 100 as a separate absorbent article, as shown in FIG. The disposable diaper 100 used in combination with the absorbent pad 1 includes a liquid-permeable surface sheet 101 that forms a skin-facing surface, a liquid-impermeable back sheet 102 that forms a non-skin-facing surface, and a space between both

sheets

101 and 102. In the same manner as the absorbent pad 1, the absorbent body 103 is long in one direction. A pair of three-dimensional gathers 104 and 104 having elastic members are provided on both sides of the disposable diaper 100 on the skin facing surface side along the longitudinal direction X, and the outer side of the absorbent body 103 in the lateral direction Y is A pair of

leg flap portions

105, 105 having elastic members are provided.

Since the absorbent pad 1 of the present embodiment includes the absorbent body 4 having the above-described characteristic configuration, the absorbent body 4 is deformed as shown in FIG. As a result, it is possible to achieve both ease of application to the wearer's crotch, good wearing feeling and stable absorption performance. In addition, the code | symbol 200 in FIG. 5 is a crotch (groin part) of the wearer of an absorptive pad. Further, from the viewpoint of easy explanation, in FIG. 5, illustration of some of the constituent members of the absorbent pad 1 (

core wrap sheets

51 and 61, intermediate sheet 10 and the like) is omitted.

In general, a gap is generated between the wearer's excretory part and the absorbent pad (placement part of the absorbent body in the absorbent pad) due to reasons such as an inappropriate wearing method, or the absorbent body around the excretory part is wrinkled. When urine has occurred, excreted fluid such as urine is not absorbed by the absorber in those areas where it is generated, but travels through the wearer's skin to other parts of the absorber, where When concentrated locally and absorbed, the liquid absorption retention capacity of such a concentrated portion of excreted liquid immediately becomes saturated, and liquid leakage is likely to occur. As means for avoiding such inconvenience, as shown in FIGS. 6 (b) and 6 (c), the absorbent body 4 ′ is provided with a groove 9 ′ penetrating the absorbent body 4 ′ in the thickness direction. It is conceivable to provide two along the longitudinal direction X so as to extend from the crotch part to the front throat part. 6 (b) and 6 (c) includes a central absorbent body 7 and a pair of side

absorbent bodies

8 and 8 provided on both sides of the central absorbent body 7. In addition, a groove 9 ′ extending in the longitudinal direction X and penetrating the absorber 4 ′ in the thickness direction is provided between the central absorber 7 and each of the pair of

side absorbers

8 and 8. In the form shown in FIG. 6C, two grooves 9 ′ and 9 ′ extending in the vertical direction X are opened at both ends in the vertical direction along the horizontal direction Y of the absorber 4 ′. It differs from the embodiment shown in FIG. 6B that does not have such an open end only in that it has open ends at both ends.

However, the absorbent pad (not shown) having the absorbent body 4 'shown in FIG. 6B or 6C has the following problems when worn. That is, as usual, in order to wear the absorbent pad provided with the absorbent body 4 ', the front part of the absorbent pad is inserted by hand with the absorbent pad inserted under the buttocks of the supine wearer. When grasped and pulled up from the crotch of the wearer to the abdomen, as shown in FIGS. 6B and 6C, the front side of the central absorbent body 7 of the absorbent body 4 ′ (the upper side of FIG. 6). ), When a lifting force U for lifting the portion from the crotch to the abdomen is applied, the lifting force U causes the pair of side absorbers 8 located on both sides as well as the front side of the central absorber 7. , 8 are also pulled up from the crotch of the wearer to the abdomen almost simultaneously with the front side of the central absorbent body 7. In addition, the pair of side

absorbent bodies

8 and 8 always receive an inward pressing force P by the wearer's thigh at the crotch part (the central part in the longitudinal direction X of the absorbent body 4 ′). It is pushed to the central absorber 7 side. Accordingly, during the lifting of the absorbent pad from the crotch to the ventral side, the side absorbent body 8 that is pulled up almost simultaneously with the central absorbent body 7 is pushed inward in the lateral direction Y by the pressing force P, and the central absorbent body is absorbed. Contact with the side surface of the body 7 (the wall surface defining the groove 9) causes wrinkles in the central absorbent body 7, or the side absorbent body 8 moves to the skin facing surface side of the central absorbent body 7. It overlaps with this and there exists a possibility that it may not bend so that absorber 4 'may follow a wearer's ridge part. If wrinkles occur in the central absorbent body 7 or the side absorbent bodies 8 overlap the skin-facing surface of the central absorbent body 7, the adhesion between the wearer's excretory part and the absorbent pad cannot be ensured and absorbed. Performance may be reduced.

On the other hand, in the absorbent pad 1 of the present embodiment, the overlapping portion 90 of the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 constituting the absorber 4 has the vertical direction X and the horizontal direction as described above. Since it has the specific shape which has the bending part 94 bent in the direction which cross | intersects both directions of Y, the absorber 4 can be bent easily along a wearer's ridge part, FIG.6 (b). And the inconvenience which is anxious about absorber 4 'shown in FIG.6 (c) hardly arises. That is, in order to wear the absorbent pad 1 of the present embodiment having the absorbent body 4 (upper layer 5 and lower layer 6), the front part F of the absorbent pad 1 is gripped by hand as usual. When pulling up from the crotch to the ventral side, as shown in FIG. 6 (a), the pulling force to pull the portion from the crotch to the ventral side toward the front part F side (upper side in FIG. 6) of the central absorbent body 7 of the absorbent body 4 When U acts, first, the front part F side of the central absorbent body 7 is lifted from the crotch to the ventral side by the lifting force U, and then slightly behind the front part F side of the central absorbent body 7, The front portion F side of each of the pair of

side absorbers

8, 8 positioned on both sides (the portion near the closed end portion 93 on the front side in the longitudinal direction X in the side absorber 8 of each of the upper layer 5 and the lower layer 6), and The continuous crotch part M side is successively pulled up from the crotch to the abdomen. And as above-mentioned, a pair of

side part absorbers

8 and 8 are receiving the inward pressing force P by a wearer's thigh at the crotch lower part M (refer FIG. 1), respectively, from the crotch. When pushed to the side of the central absorbent body 7 while being pulled up to the ventral side, the front part F side of the central absorbent body 7 is pulled up ahead of the front part F side of the side part absorbent body 8, so that the side part Since it is located above the front part F side of the absorbent body 8 and not on the side of the front part F side of the side part absorbent body 8, the side pushed to the central absorbent body 7 side during lifting As shown in FIG. 5, the front part F side and the crotch M side of the body absorbent body 8 move to the non-skin facing surface side of the central absorbent body 7 and overlap therewith. 6A schematically shows only a part of the absorber 4 (the overlapping portion 90 between the upper layer 5 and the lower layer 6) from the viewpoint of easy explanation.

In particular, in the present embodiment, both the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 (the overlapping portion 90 of both

grooves

9A and 9B) are the peripheral portions of the absorber 4 (upper layer 5 and lower layer 6). Since the pair of

side absorbers

8 and 8 are not opened to the side edges along the vertical direction X, the pair of

side absorbers

8 and 8 are respectively inward by the wearer's thighs at the crotch M (parallel to the lateral direction Y). Direction) when receiving the pressing force P (see FIG. 6A), the portion receiving the pressing force P [the crotch M side of the side absorbent body 8 (the portion located in the crotch M)] Then, it is pushed toward the central absorbent body 7 in the same direction as the direction in which the pressing force P acts. That is, in this embodiment, since the pressing force P is suppressed by the rigidity of the absorber 4 in the vicinity of the closed end portion 93 on the front portion F side and the rear portion R side, the side absorber 8 is laterally moved. It becomes difficult to enter inside Y. Therefore, according to the absorbent pad 1 of the present embodiment, the inward pressing force P by the thighs is efficiently applied only to the crotch part M, that is, only to the urinating part of the wearer and the part disposed to face it. It can be used for the deformation of the absorbent body 4 well, so that it is possible to further improve the feeling of wearing.

On the other hand, for example, both the groove 9A of the upper layer 5 and the groove 9B of the lower layer 6 (the overlapping portion 90 of both

grooves

9A and 9B) are formed in the longitudinal direction X of the absorber 4 (upper layer 5, lower layer 6) in the front portion F. And a pair of

side absorbers

8 and 8 are respectively crotch parts, when the side edges of the front part F have open ends (not shown). When the pressing force P in the direction parallel to the lateral direction Y by the wearer's thigh is received at M, the portion receiving the pressing force P [the crotch M side of the side absorbent body 8 (to the crotch M) Rather than the portion that is positioned)], the portion near the open end, which is located on the front side in the longitudinal direction X, is more likely to be pushed toward the central absorber 7 side. That is, when the

grooves

9A and 9B (the overlapping portion 90 of both

grooves

9A and 9B) are opened to the side edge of the absorber 4 (the

grooves

9A and 9B have an open end at the side edge of the absorber 4. The side absorbent body 8 overlaps the non-skin facing surface of the central absorbent body 7 more in the front part F than in the crotch part M, and in the crotch part M this overlap Can not be secured sufficiently, the adhesion between the urination part and the central absorbent body 7 at the crotch part M, that is, the urinating part of the wearer and the part disposed in the vicinity thereof, cannot be sufficiently obtained. There is a fear. However, when the

grooves

9A and 9B (the overlapping portion 90 of both

grooves

9A and 9B) are opened to the side edge of the absorber 4, the wearer's thigh is easy to move, and inconveniences such as tightening are unlikely to occur. There is a unique advantage.

Further, particularly in the present embodiment, as described above, the overlapping of the groove 9A and the groove 9B is on or near the extension line of the bent side edge 4S2 that the absorber 4 has on the front side in the longitudinal direction X from the rear portion R. Since the bent portion 94 of the portion 90 exists, the absorbent body 4 is easily deformed along the wearer's ridge portion, and a good wearing feeling and a stable absorption performance are more easily obtained. FIG. 7A schematically shows the relationship between the overlapping portion 90 and the wearer's ridge portion. It is ideal for the absorbent pad 1 to bend at a bending line (the portion indicated by a dotted line in FIG. 7 (a)) along the wearer's throat when worn, in order to obtain a good wearing feeling and absorption performance. The bent line includes the bent side edge 4S2 of the absorbent body 4 and its extended line and a straight line extending in the vertical direction. In the present embodiment, the bent line has a relatively low rigidity and is easy to bend. When the absorbent pad 1 is worn, the overlapping portion 90 substantially coincides with the bent line (skin portion), so that the absorbent pad 1 is easily bent at the overlapping portion 90, and the lateral portion Y extends beyond the overlapping portion 90. The entire region of the portion located in the direction (the hatched portion in FIG. 7A) is deformed following the wearer's body, and as a result, a good wearing feeling and absorption performance can be obtained more reliably. It is done.

On the other hand, the overlapping portion 90A shown in FIG. 7B is composed of only a linear portion 92 ′ extending in the vertical direction X, and is a bent portion extending in a direction intersecting both the vertical direction X and the horizontal direction Y. Therefore, when the absorbent pad having the overlapping portion 90A is worn, it does not coincide with the bent line (the ridge portion). Further, the overlapping portion 90B shown in FIG. 7C has a linear portion 92 ′ extending in the longitudinal direction X and a bent portion 94 ′ extending in a direction intersecting with the straight portion 92 ′. Since it extends in parallel with the direction Y, it does not coincide with the bent line (skin portion) when the absorbent pad having the overlapping portion 90B is worn. Therefore, these absorbent pads bend at the portions where the overlapping

portions

90A and 90B do not exist, and as a result, the bent lines (shown by dotted lines in FIGS. 7B and 7C) in the absorbent pad. Only a part of the part located outward in the lateral direction Y (the hatched part in FIGS. 7 (b) and 7 (c)) follows the wearer's body, etc. This part is difficult to follow and there is room for improvement in terms of wearing feeling and absorption performance.

Moreover, when the front part F side of the absorber 4 (upper layer 5 and lower layer 6) is pulled up from the crotch of the wearer to the abdomen, it is worn on the skin facing surface side of each of the pair of

side absorbers

8 and 8 in the upper layer 5. Due to friction with the inner crotch of the person, a resistance force against pulling acts, whereby a shearing force acts between the upper layer 5 and the lower layer 6 to separate both

layers

5 and 6 in the vertical direction, thereby forming the groove 9A. , 9B is a concern. However, in the absorbent pad 1 of the present embodiment, as described above, the intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, and each of these

layers

5, 6 and the intermediate sheet 10 are joined. For this reason, the two

layers

5 and 6 are not easily separated in the vertical direction by the pulling-up operation of the absorbent pad 1 to the skin side, and the

grooves

9A and 9B are not easily displaced.

In short, the absorbent pad 1 according to the present embodiment is first placed on the skin-facing surface side of the disposable diaper 100 as shown in FIG. After that, by pulling up the diaper 100, the portion near the closed end 93 on the front side in the longitudinal direction X in the side absorber 8 of each of the upper layer 5 and the lower layer 6 constituting the absorber 4 is absorbed by the central absorption of the lower layer 6. It moves integrally with the non-skin facing surface side of the body 7 so as to overlap therewith, and fits along the wearer's ridge by deformation of the absorbent body 4, and the excretory part of the wearer Therefore, it is possible to achieve both good ease of application to the wearer's crotch, good wearing feeling and stable absorption performance.

In particular, in the present embodiment, the

grooves

9A and 9B extend in the longitudinal direction X at least in the rear part of the crotch part M (the part near the rear part R of the crotch part M), as shown in FIGS. It has

linear portions

92A and 92B, and the

grooves

9A and 9B (overlapping portion 90) in the rear portion of the crotch part M have a linear shape extending in the vertical direction X in plan view. On the other hand, the groove in the rear part of the crotch M is not a linear shape extending in the longitudinal direction X in plan view, but has a bent portion and faces the side edge along the longitudinal direction X of the absorber 4. When the absorbent pad is formed, since the force from the inner crotch portion decreases as the crotch part M is located rearward when the absorbent pad is worn, the portion located in the rear part of the crotch part M in the groove has a certain amount. It becomes a liquid diffusion guide path having a width, and it is easy to guide the liquid to the side edge of the absorber or the vicinity thereof. And if a liquid concentrates in the side edge vicinity of an absorber, since the absorptive material which comprises an absorber (absorbent core) will reach saturation easily, a liquid will overflow from an absorber and it will be easy to lead to a leak. As in the present embodiment, since the

grooves

9A and 9B (overlapping portion 90) in the rear portion of the crotch part M have a linear shape extending in the vertical direction X in plan view, such inconvenience is effectively prevented.

In the crotch M, if the length (width) in the lateral direction Y of the lower layer 6 (lower absorbent core 60) is equal to or smaller than that of the upper layer 5 (upper absorbent core 50), absorption occurs. When the sexual pad 1 is worn, a relatively high-rigidity member such as an absorber comes into contact with the wearer's skin on a smooth surface, thereby effectively preventing pressure concentration. On the contrary, if the width of the upper layer 5 is smaller than the width of the lower layer 6, the surface on which a step due to the width of the both

layers

5 and 6 is present comes into contact with the wearer's skin. It is not preferable. Accordingly, the width of the lower layer 6 is preferably equal to or smaller than the width of the upper layer 5. In particular, when the width of the lower layer 6 is smaller than the width of the upper layer 5, the side portion along the vertical direction X of the upper layer 5 covers the side section along the vertical direction X of the lower layer 6. The side end surface along the vertical direction X becomes a smooth curved surface, and thereby the force of the absorber end surface applied to the inner crotch portion of the wearer is reduced, and it is difficult to place a burden on the skin.

Further, in the present embodiment, the

grooves

9A and 9B (overlapping portion 90) are formed only in the front portion F and the crotch portion M in the absorber 4, and are not formed in the rear portion R. The reason is that when the overlap or wrinkle between the upper layer 5 and the lower layer 6 described above occurs in the rear portion R, particularly the portion located below the wearer's buttocks when worn, pressure is locally applied to the wearer's skin. It is easy to cause skin trouble. If a groove is formed in the rear portion R (the portion to which the load of the buttocks is applied when worn), the groove has a force in the direction of narrowing its width (the length in the direction perpendicular to the length direction of the groove). Since the groove is hardly applied, the groove retains its shape as a step when the absorbent pad is worn, and the groove is easily overlapped by the force applied when wearing or changing the posture. As a result, body pressure is applied to the groove. Concentrates easily and causes skin problems. Therefore, in order to avoid such inconvenience and to make the above-described operation and effect more reliable, the rear portion R (the portion to which the load of the buttocks is applied when worn) is absorbed as in this embodiment. It is preferable not to provide a groove penetrating the body 4 (upper layer 5, lower layer 6) in the thickness direction.

The deformation of the absorber 4 as shown in FIG. 5, that is, “the side absorber 8 is bent at the overlapping portion 90 of the groove 9 A of the upper layer 5 and the groove 9 B of the lower layer 6, From the viewpoint of ensuring that the front part F side and the crotch part M side of the body 8 are moved to the non-skin-facing surface side of the central absorbent body 7 of the lower layer 6 and overlap with this, the overlapping part The width of 90 is preferably larger than the thickness of the absorber 4 under no pressure. Here, the “width of the overlapping portion” is a length in a direction orthogonal to the length direction of the overlapping portion (groove), and when the width is different between the upper layer groove and the lower layer groove as in this embodiment. The relatively smaller width (in this embodiment, the width 9WA of the groove 9A of the upper layer 5) is meant.

In the absorber 4 under no pressure, the ratio of the width of the overlapping portion 90 (same as the width 9WA in the present embodiment) and the thickness of the absorber 4 (width of the overlapping portion 90 / thickness of the absorber 4) is preferably 2.0 or more, more preferably 4.0 or more, and preferably 10.0 or less, more preferably 7.0 or less, more specifically, preferably 2.0 or more and 10.0 or less, more preferably It is 4.0 or more and 7.0 or less. Here, the thickness under no pressure means the thickness under a pressure of 0.5 cN / cm ³ obtained by the following measurement method.

<Measurement method of absorber thickness>
Spray cold spray (trade name) manufactured by Nichiban Co., Ltd. from the surface of the absorbent pad. Thereafter, the constituent material other than the absorber is carefully peeled off from the absorbent pad. A circular plate having a weight of 2.5 g and a radius of 12.5 mm is placed on the measurement table, and the position of the upper surface of the circular plate in this state is set as a reference point A for measurement. Next, the circular plate is removed, the absorber to be measured is placed on the measurement table, the circular plate is placed again thereon, and the position of the upper surface of the circular plate in that state is defined as position B. A laser displacement meter (manufactured by Keyence Corporation, CCD laser displacement sensor LK-080) is used as a measuring instrument. The difference between the reference point A and the position B is defined as the thickness of the absorber under no pressure, that is, the thickness of the absorber under a pressure of 0.5 cN / cm ³ .

The width 9WA of the groove 9A of the upper layer 5 and the width 9WB of the groove 9B of the lower layer 6 are each preferably 5 mm or more, more preferably 10 mm or more, and preferably 40 mm or less, more preferably 30 mm or less, more specifically. The thickness is preferably 5 mm or more and 40 mm or less, more preferably 10 mm or more and 30 mm or less.
The thickness of the absorber 4 under no pressure (the total thickness of the upper layer 5 and the lower layer 6 under no pressure) is preferably 1.0 mm or more, more preferably 2.0 mm or more, and preferably 10. It is 0 mm or less, More preferably, it is 7.0 mm or less, More specifically, Preferably it is 1.0 mm or more and 10.0 mm or less, More preferably, it is 2.0 mm or more and 7.0 mm or less.

As described above, the width 9WB of the groove 9B in the lower layer 6 is larger than the width 9WA of the groove 9A in the upper layer 5, and the ratio between them (width 9WA / width 9WB) is preferably 1.1 or more. More preferably 1.3 or more, and preferably 2.0 or less, more preferably 1.8 or less, more specifically preferably 1.1 or more and 2.0 or less, and more preferably 1.3 or more. It is 1.8 or less.

Moreover, from a viewpoint which suppresses that wrinkles generate | occur | produce in the absorber 4 at the time of wear, and reduces the uncomfortable feeling at the time of wear, in the pair of

side part absorbers

8 and 8 in the center absorber 7 of each of the upper layer 5 and the lower layer 6 The length (width) 71W (see FIG. 3) in the lateral direction Y of the sandwiched portion (band-like portion 71) is preferably set to be equal to or smaller than the wearer's crotch width, more specifically 70 mm or less, particularly 50 mm. It is preferable to set the following. On the other hand, from the viewpoint of stably adhering the excretory part of the wearer and the absorbent pad 1, the length 71W of the belt-like portion 71 is preferably set to 20 mm or more, particularly 30 mm or more. Therefore, the length 71W in the lateral direction Y of the belt-like portion 71 of the central absorbent body 7 is preferably 20 mm or greater and 70 mm or less, and more preferably 30 mm or greater and 50 mm or less. In the present embodiment, the upper layer 5 and the lower layer 6 have the same length 71W of the belt-like portion 71.

The absorbent pad 1 of this embodiment will be further described. As shown in FIGS. 1 and 2, at the left and right side portions along the longitudinal direction X of the main body 15, the skin of the wearer at the time of wearing at least the excretory portion facing portion B. A pair of three-dimensional gathers 20, 20 standing up toward the side is provided. The three-dimensional gather 20 stands up with the main body 15 side as a base end and a free end on the skin side of the wearer, and is connected to the base wall portion 21 and the upper end portion of the base wall portion 21 in the vertical direction. The elastic member 25 is comprised along the X along with the elastic expansion-contraction part 22 arrange | positioned in the expansion | extension state.

In addition to the elastic member 25, the three-dimensional gather 20 is further configured to include one side sheet 26 having a certain width in the longitudinal direction X. The side sheet 26, as shown in FIG. The portion 21 and the upper end portion thereof are folded back so as to have a shape in which an elastic stretchable portion 22 is continuously provided. Accordingly, the three-dimensional gather 20 formed by folding the side sheet 26 has a two-layer structure in the base wall portion 21 and the elastic stretchable portion 22 as shown in FIG. The

side sheets

26 and 26 constituting the two-layer structure are joined by an adhesive (not shown).

As shown in FIG. 2, the base wall 21 is joined to the skin facing surface of the main body 15 (the skin facing surface of the topsheet 2) above the absorber 4, and the joint 23 is the base end. And it has the standing part 24 which stands up toward a wearer's skin side at the time of wear by using the elastic elastic part 22 (tip part of the elastic elastic part 22) as the free end. Portions other than the standing portion 24 in the base wall portion 21 are wound down along the side edge along the longitudinal direction X of the absorber 4, and further extend outward in the lateral direction Y from the side edge of the absorber 4. The extension part is joined to the extension part from the side edge of the absorbent body 4 in the back sheet 3 by a known joining means such as an adhesive or heat seal. A joint portion 23 (the base end) between the base wall portion 21 (standing portion 24) and the topsheet 2 (main body 15) is linear in a plan view, and has a substantially total length of the three-dimensional gather 20 along the vertical direction X. It extends over. The joint portion 23 is formed by applying an adhesive such as a hot melt adhesive. The linear joint portion 23 may be a continuous line in which the adhesive is continuously applied along the longitudinal direction X, or may be a broken line in which the adhesive is applied discontinuously. It can be a straight line or a curved line. The linear joint 23 in the present embodiment is a straight line and a continuous line.

The elastic stretchable portion 22 is given stretchability by one or more (two in the present embodiment) elastic members 25 extending in the longitudinal direction X being joined and fixed to the side sheet 26 in an extended state. The expansion / contraction direction coincides with the vertical direction X. The elastic stretchable part 22 extends over at least the entire length of the crotch part M in the longitudinal direction X, and in this embodiment further extends to the front part F and the rear part R near the crotch part M. The elastic member 25 is disposed in an extended state between the two

side sheets

26 and 26 constituting the elastic expansion / contraction part 22, and is joined to the

side sheets

26 and 26 by an adhesive (not shown).

As shown in FIG. 1, in the front part F and the rear part R, the elastic stretchable part 22 at the end in the longitudinal direction X of the three-dimensional gather 20 is joined to the main body 15 (surface sheet 2), and its stretchability is obstructed. The three-dimensional gathered non-expandable portion 27 is formed. The absorbent pad 1 has a pair of left and right three-dimensional gathers 20 extending along the longitudinal direction X of the main body 15 joined to the main body 15 at the front and rear ends in the vertical direction X, respectively. By forming 27, it curves between both the

non-expandable parts

27 and 27 in a natural state. Due to the contraction of the elastic stretchable part 22, the absorbent pad 1 has its entire shape in the longitudinal direction X curved in a concave shape on the skin facing surface side (surface sheet 2 side) in a natural state.

In the present embodiment, when each part of the absorbent pad 1 is extended so that the absorbent pad is expanded in a planar shape as shown in FIG. 1, the elastic stretchable part that is the free end of the three-dimensional gather 20 22 (tip portion of the elastic expansion / contraction part 22) is in the lateral direction Y more than the linear part 92 of the overlapping part 90 (the linear part 92A of the relatively smaller groove 9A among the vertically overlapping

grooves

9A and 9B). Located outside of. With such a configuration, as described above, the absorbent body 4 is deformed by the lifting operation of the absorbent pad 1 when the absorbent pad 1 is worn, and a part of the side absorbent body 8 is formed as shown in FIG. When it moves to the non-skin facing surface side of the central absorbent body 7 and overlaps with this, the close contact position between the wearer's excretory part and the arrangement area of the central absorbent body 7 in the absorbent pad 1 is in the lateral direction Y. Even if it is slightly deviated, the three-dimensional gather 20 does not cover the upper part of the central absorbent body 7, and therefore, the disadvantage that the liquid absorbent retention by the central absorbent body 7 is obstructed by the three-dimensional gather 20 is effectively prevented.

Moreover, in this embodiment, the junction part 23 which is the said base end of the three-dimensional gather 20 follows the longitudinal direction X of the side part absorber 8 of the upper layer 5 in the planar view of the absorptive pad 1 as shown in FIG. It overlaps with the side edge 8s or its vicinity. Further, the joint portion 23 extends in parallel to the linear portion 92 of the overlapping portion 90 (the linear portion 92A of the relatively smaller groove 9A among the vertically overlapping

grooves

9A and 9B). . Here, “the vicinity of the side edge 8 s of the side absorber 8 of the upper layer 5” is a region within 8 mm inward in the lateral direction Y from the side edge 8 s of the side absorber 8 of the upper layer 5. Is part of. With such a configuration, the joint 23 that is the base of the three-dimensional gather 20 can follow the movement of the side absorbent body 8 toward the central absorbent body 7 due to the pulling-up operation when the absorbent pad 1 is worn. At the same time, the elastic expansion / contraction part 22 (the tip part of the elastic expansion / contraction part 22), which is the free end of the three-dimensional gather 20, can surely approach the wearer's ridge part, whereby the elastic expansion / contraction part 22 is Adhesiveness to the ridge portion is increased. Further, the joint 23 of the three-dimensional gather 20 overlaps the side edge 8s of the side absorbent body 8 of the upper layer 5 or the vicinity thereof, so that excretory fluid such as urine is absorbed on the skin facing surface of the absorbent pad 1. Since a possible wide absorption surface can be secured, the absorption performance can be further improved. The linear side edge 4S1 of the absorber 4 described above coincides with a part of the side edge 8s of the side absorber 8 of the upper layer 5.

The material for forming each part of the absorbent pad 1 will be described. As the top sheet 2 and the back sheet 3, various materials conventionally used in the technical field can be used without particular limitation. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. The back sheet 3 may be liquid-impermeable or liquid-permeable, for example, a resin film that does not have moisture permeability, a resin film that has micropores and moisture permeability, and a nonwoven fabric such as a water-repellent nonwoven fabric, A laminate of the sheet and other sheets can be used.

As the water-absorbing material constituting the upper layer 5 (upper absorbent core 50) and the lower layer 6 (lower absorbent core 60), various materials conventionally used in the technical field can be used without particular limitation, for example , Natural cellulose fibers such as wood pulp, and fiber materials such as hydrophilic synthetic fibers; water-absorbing polymers having a predetermined shape such as particulates and fibers, and the like. These may be used alone or in combination of two or more. Can be used.

The basis weight of the upper layer 5 (upper layer absorbent core 50) is preferably 150 g / m ² or more, more preferably 200 g / m ² or more, and preferably 600 g / m ² or less, more preferably 500 g / m ² or less. More specifically, it is preferably 150 g / m ² or more and 600 g / m ² or less, and more preferably 200 g / m ² or more and 500 g / m ² or less.
The basis weight of the lower layer 6 (lower layer absorbent core 60) is preferably 150 g / m ² or more, more preferably 200 g / m ² or more, and preferably 700 g / m ² or less, more preferably 600 g / m ² or less. More specifically, it is preferably 150 g / m ² or more and 700 g / m ² or less, more preferably 200 g / m ² or more and 600 g / m ² or less.
The upper layer 5 (upper absorbent core 50) and the upper layer 5 (upper absorbent core 50) may have the same basis weight or different basis weights.

The upper layer 5 (upper layer absorbent core 50) and the lower layer 6 (lower layer absorbent core 60) may have the same composition or different compositions. In the latter case, the upper layer 5 and the lower layer 6 excrete liquid such as urine. The function for can be different. For example, if the upper absorbent core 50 contains more wood pulp than the water absorbent polymer and the lower absorbent core 60 contains more water absorbent polymer than the wood pulp, 5 is excellent in the liquid diffusion function, and the lower layer 6 is excellent in the liquid holding function, and it is possible to share functions such as liquid diffusion mainly in the upper layer 5 and liquid holding mainly in the lower layer 6. Furthermore, in such a configuration, if the intermediate sheet 10 interposed between the upper layer 5 and the lower layer 6 is excellent in liquid diffusibility, the liquid diffusibility as a whole of the absorber 4 can be further improved. Examples of the intermediate sheet 10 having excellent liquid diffusibility include paper containing 10% by mass or more of hydrophilic fibers that are bulky, such as crosslinked pulp, rayon, and mercerized pulp.

The content mass ratio (fiber material / water absorbent polymer) of the fiber material such as wood pulp and the water absorbent polymer in the upper layer 5 (upper layer absorbent core 50) is preferably 0.75 or more, more preferably 1.0 or more, And preferably it is 5.0 or less, More preferably, it is 3.0 or less, More specifically, Preferably it is 0.75 or more and 5.0 or less, More preferably, it is 1.0 or more and 3.0 or less.
The mass ratio (fiber material / water absorbent polymer) of the fiber material such as wood pulp and the water absorbent polymer in the lower layer 6 (lower layer absorbent core 60) is preferably 0.75 or more, more preferably 1.0 or more. And preferably it is 5.0 or less, More preferably, it is 3.0 or less, More specifically, Preferably it is 0.75 or more and 5.0 or less, More preferably, it is 1.0 or more and 3.0 or less.

As the upper layer core wrap sheet 51, the lower layer core lamp sheet 61, and the intermediate sheet 10, a liquid permeable sheet can be used. For example, paper such as tissue paper, various non-woven fabrics, apertured films, and the like can be used. it can. The basis weight of each

sheet

51,61,10 is preferably 10 g / m ² or more, more preferably 12 g / m ² or more, and preferably 20 g / m ² or less, more preferably 18 g / m ² or less, more Specifically, it is preferably 10 g / m ² or more and 20 g / m ² or less, more preferably 12 g / m ² or more and 18 g / m ² or less.

As the intermediate sheet 10, a sheet having a color different from that of each constituent member (surface sheet 2, upper layer 5, etc.) of the absorbent pad 1 disposed on the skin facing surface side can be used. Different colors may be used. For example, when the intermediate sheet 10 is colored in a different color from the top sheet 2 and the upper layer 5 (upper absorbent core 50 and upper core wrap sheet 51), the absorbent pad 1 is viewed from the top sheet 2 side. If the coloring of the intermediate sheet 10 is made visible through the overlapping portion 90 of the

grooves

9A and 9B, the positioning at the time of wearing becomes easy, and the work burden on the wearer is reduced. Moreover, only the part corresponding to a part (for example, bending part 94) of the overlapping part 90 in the intermediate sheet 10 has a color different from that of the top sheet 2 and the upper layer 5, thereby improving the visibility of the part. You can also.

As the side sheet 26 constituting the three-dimensional gather 20, various types conventionally used in the technical field can be used without particular limitation. For example, a water-repellent nonwoven fabric, a sheet made of a resin film, a nonwoven fabric, and the like A laminate with a resin film or the like can be used. Further, as the elastic member 25 for forming a three-dimensional gather, various members conventionally used in the technical field can be used without particular limitation, and may be a thread shape or a belt shape.

FIG. 8 shows a main part of another embodiment of the absorbent body according to the present invention (first invention). In other embodiments to be described later, constituent parts different from those of the above-described embodiment will be mainly described, and the same constituent parts are denoted by the same reference numerals and description thereof will be omitted. The description of the above embodiment is applied as appropriate to components that are not particularly described. The hatched portion in FIG. 8 is the lower layer 6.

In the embodiment, as shown in FIGS. 1 and 3, both the groove 9 A of the upper layer 5 and the groove 9 B of the lower layer 6 are formed in the peripheral portion of the absorber 4 (upper layer 5 and lower layer 6) In the present invention (first invention), only one of them has a closed end, although it is not open to the side edge along the direction X) and has closed ends 93A and 93B. May be. In the embodiment shown in FIG. 8 (a), only the groove 9A of the upper layer 5 is not opened to the side edge of the absorber 4 (upper layer 5) but has a closed end 93A, and the lower layer 6 is The side edge is open, and the side edge has an open end 91B.

However, as shown in FIG. 8 (a), when any one of the upper and lower layers constituting the absorber is open to the side edge of the absorber and has an open end, the open end The shape of the layer having a portion (the lower layer 6 in the embodiment shown in FIG. 8A) tends to collapse when the absorbent pad is worn. For example, when the shape of the lower layer 6 collapses, in the above-described deformation of the absorbent body 4 (see FIG. 5), the side absorbent body 8 is substantially only on the front part F side and the non-skin facing surface of the central absorbent body 7. Overlap and inconvenience that it becomes difficult to overlap on the crotch M side. Therefore, it is preferable that the groove | channel of each upper and lower layer has a closed end part not open | released to the peripheral part of an absorber like the said embodiment.

Further, in the embodiment shown in FIG. 8A, the side portion 41 (portion located outside the overlapping portion 90 in the lateral direction Y) along the longitudinal direction X of the absorber 4 is the upper layer 5 and the lower layer 6, respectively. The side structure of the absorber is similar to that of the crotch part M and the crotch part M of each of the front part F and the rear part R in the above embodiment. In the present invention (first invention), the side portion along the longitudinal direction of the absorber is a laminated structure of such upper and lower side absorbers. Instead, it may be configured to include only one side absorber of the upper and lower layers. In the embodiment shown in FIG. 8B and FIG. 8C, the groove 4B of the lower layer 6 straddles the side edge 8s of the side absorber 8 of the upper layer 5, and thus the absorber 4 The side portion 41 is composed of the side absorber 8 of the lower layer 6 and the side absorber 8 of the upper layer 5 in order from the outer side in the lateral direction Y, and any one of the upper and

lower layers

5, 6. It is configured to include only. Further, in the embodiment shown in FIG. 8C, only the groove 9B of the lower layer 6 has a closed end portion 93B that is not opened at the peripheral edge portion of the absorber 4 (lower layer 6), and the upper layer 5 is The side edge that is a part of the peripheral edge is open, and the side edge has an open end 91A.

However, as shown in FIG. 8 (b) and FIG. 8 (c), the side part along the longitudinal direction of the absorber is only one side absorber of the upper and lower layers constituting the absorber. If it is configured to be included, the absorption capacity of the side portion is reduced, and in particular, when the wearer lies down sideways when wearing the absorbent pad, there is a tendency that side leakage is likely to occur. Therefore, as in the above-described embodiment, it is preferable that the side portion along the longitudinal direction of the absorber has a stacked structure including the side absorbers of the upper and lower layers constituting the absorber.

As mentioned above, although this invention (1st invention) was demonstrated based on the preferable embodiment, this invention (1st invention) is not restrict | limited to the said embodiment. For example, in the above embodiment, in the upper layer 5, only the skin facing surface of the upper absorbent core 50 is covered by one upper core wrap sheet 51, and in the lower layer 6, the skin facing surface of the lower absorbent core 60 and On the contrary, in the upper layer 5, both the skin facing surface and the non-skin facing surface of the upper absorbent core 50 are coated on both surfaces of the non-skin facing surface. It may be covered with one upper core wrap sheet 51, and in the lower layer 6, only the skin facing surface of the lower absorbent core 60 may be covered with one lower core wrap sheet 61, or both

layers

5, 6 In both cases, only the skin facing surface of each absorbent core or both the skin facing surface and the non-skin facing surface may be covered with one core wrap sheet.

In the above embodiment, as shown in FIG. 2, both of the opposing

side walls

96 and 96 that define the groove 9B of the lower layer 6 define the groove 9A of the upper layer 5 that corresponds to the groove 9B. Although the groove 9B has a larger width than the groove 9A (width 9WA <width 9WB) by being positioned outward in the lateral direction Y rather than both opposing

side walls

95, 95. Only one of the both

side walls

96, 96 of the groove 9B is located outward in the lateral direction Y from one of the

side walls

95, 95 of the corresponding groove 9A, and the

other side walls

96, 95 are in contact with each other. May exist at the same position in the lateral direction Y, and in such a form, the width 9WA <width 9WB can be realized. All the parts of only the one embodiment described above can be used together as appropriate.

Hereinafter, the absorbent pad of the present invention (second invention) will be described with reference to the drawings based on a preferred embodiment thereof. As shown in FIGS. 9 and 10, the absorbent pad 1 A of this embodiment is interposed between a top sheet 2 that forms a skin facing surface, a back sheet 3 that forms a non-skin facing surface, and both

sheets

The main body 15 (absorber 4) has a long shape in one direction (vertical direction X) in a plan view as shown in FIG. As shown in FIG. 10, the top sheet 2 that forms the skin facing surface of the main body 15 covers the whole area of the skin facing surface of the absorbent body 4, and the back sheet that forms the non-skin facing surface of the main body 15. 3 covers the whole area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction of the absorbent body 4 (both side edges along the longitudinal direction of the lower layer to be described later). ing. Moreover, both the

sheets

The absorber 4 includes a laminated structure (two-layer structure) composed of an upper layer 5 and a lower layer 6 disposed on the non-skin facing surface side of the upper layer 5. As shown in FIG. 10, the upper layer 5 covers the entire upper absorbent core 50 mainly composed of a water-absorbing material, and at least the entire surface of the upper absorbent core 50 facing the skin (opposed surface to the topsheet 2). One lower layer core wrap sheet 51 is included, and the lower layer 6 is also composed of a lower layer absorbent core 60 mainly composed of a water absorbent material and at least a skin-facing surface of the lower layer absorbent core 60 ( And a single lower core wrap sheet 61 covering the entire area of the surface facing the upper layer 5. The skin-facing surface of the upper absorbent core 50 and the upper-layer core wrap sheet 51 are joined by an adhesive, and the skin-facing surface and the non-skin-facing surface of the lower absorbent core 60 are also bonded to the lower-layer core wrap sheet 61. It is joined by the agent.

lower layers

core wrap sheets

51 and 61, so that the absorbent material from the longitudinally extending portion of the other absorbent core Movement, in particular, movement of the water-absorbing polymer to the top sheet 2 side or the back sheet 3 side is effectively prevented. When the water-absorbing polymer in the absorbent core moves to the surface sheet 2 side, the water-absorbing polymer is applied to the skin of the wearer when the particle size of the water-absorbing polymer is smaller than the interfiber space such as the nonwoven fabric constituting the surface sheet 2. May cause skin problems. Moreover, if the water-absorbing polymer in the absorbent core moves (drops) to the back sheet 3 side, it may cause holes in the back sheet 3 and lead to leakage. Further, in the present embodiment, as will be described later, when the intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, particularly when lifting the longitudinal end of the absorbent pad 1 A, If the length of the intermediate sheet 10 in the vertical direction X is short, for example, when the pad 1A is reapplied several times, an absorption that extends outward in the vertical direction X from the longitudinal end of the intermediate sheet 10 is absorbed. There is a possibility that the shape of the longitudinally extending portion of the conductive core may collapse and approach the longitudinally central portion. The above inconvenience is effectively prevented by the upper layer 5 and the lower layer 6 being configured as described above, and as a result, the good fit of the absorbent pad 1A is maintained.

The length (width) in the lateral direction Y of the upper layer core wrap sheet 51 is substantially the same as or wider than the crotch part M in the upper layer absorbent core 50. On the other hand, the length (width) in the lateral direction Y of the lower layer core wrap sheet 61 is at least twice the maximum width of the portion of the lower layer absorbent core 60 where the length (width) in the lateral direction Y is the longest. The lower layer core wrap sheet 61 covers the whole area of the skin facing surface of the lower layer absorbent core 60 and the non-skin facing surface on the opposite side thereof. The lower layer 6 has the lower layer absorbent core 60 placed on the central portion in the lateral direction Y of this one lower layer core wrap sheet 61, and both sides in the lateral direction Y are folded back to the upper surface side of the lower layer absorbent core 60. The both side edge portions are joined by a known joining means such as a hot melt adhesive to form the lower core wrap sheet 61 into a cylindrical shape and obtained by turning upside down.

As shown in FIG. 10, an intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, and both the

layers

As shown in FIGS. 9 to 11, the upper layer 5 (upper layer absorbent core 50) and the lower layer 6 (lower layer absorbent core 60) are respectively composed of the central absorbent body 7 and the crotch M or the rear of the central absorbent body 7. A pair of

side absorbers

8 and 8 connected to each other at the portion R and provided on both sides of the central absorber 7, and the central absorber 7 and the pair of

side absorbers

8 and 8, respectively. In between, there is a groove 9 penetrating the

layers

5 and 6 in the thickness direction.

In the present embodiment, the central absorbent body 7 of each of the upper layer 5 and the lower layer 6 has a lateral direction in a region extending from the front part F to the crotch part M toward the crotch part M as shown in FIG. A portion having a substantially planar isosceles trapezoidal shape portion 70 in which the length (width) of Y gradually decreases and a planar view belt-like portion 71 having a constant width, and a relatively short width in the isosceles trapezoidal shape portion 70 The strip portions 71 are connected to each other to form both

portions

70 and 71 integrally. Further, the pair of side

absorbent bodies

portions

70 and 71 of the central absorbent body 7. The two

absorbers

Since the shape of the central absorbent body 7 and the side absorbent body 8 in the upper layer 5 and the lower layer 6 in a plan view is such a specific shape, when the absorbent pad 1A is worn, the front side sock The absorbent body 4 is easily bent along the portion, and the absorbent body 4 is more likely to hit the wearer's body. As a result, the absorbent body 4 always comes into contact with the urination part of the wearer without wrinkles or twists, so that the absorbent body 4 can stably exhibit the absorption performance, and the absorbent body 4 along the body. Therefore, for example, when irregularities (mountains and valleys) are intentionally formed in the absorbent body, there is no sense of incongruity that may be given to the wearer, and the mounting performance of the absorbent pad 1A is improved.

From the viewpoint of facilitating deformation of the front part F and the central absorbent body 7 of the absorbent body 4 along the wearer's body and improving the feeling of wear and leakage prevention, the upper layer 5 (upper absorbent core 50) and the lower layer 6 One of the lower layer absorbent cores 60 preferably extends outward in the longitudinal direction X from the longitudinal end on the front portion F side of the other. In this embodiment, as shown in FIGS. 9 and 11, the upper layer 5 (upper absorbent core 50) extends from the longitudinal end 6 f on the front portion F side in the lower layer 6 (lower absorbent core 60) in the longitudinal direction X. It extends outside. The extension length 5LE (see FIG. 9) of the upper layer 5 from the longitudinal end 6f of the lower layer 6 is preferably 20 mm or more, more preferably 40 mm or more, and preferably 120 mm or less, more preferably 100 mm or less, more specifically. Specifically, it is preferably 20 mm or more and 120 mm or less, more preferably 40 mm or more and 100 mm or less.

Moreover, in this embodiment, as shown in FIG.9 and FIG.11, the dimension in planar view of the lower layer 6 (lower layer absorbent core 60) is made smaller than this dimension of the upper layer 5 (upper layer absorbent core 50). More specifically, the lower layer 6 is made shorter than the upper layer 5 at least in the longitudinal direction X. One of the main roles of the lower layer 6 is to absorb and hold body fluids such as urine excreted from the excretion part of the wearer in the excretion part facing part and the peripheral part thereof facing the excretion part in the absorbent pad 1A. In view of such a role of the lower layer 6, the upper layer 5 and the lower layer 6 do not necessarily have the same shape and dimensions, and the size of the lower layer 6 (lower layer absorbent core 60) in plan view is the upper layer 5 ( Although it may be equal to the dimension of the upper absorbent core 50), it is sufficient that the lower layer 6 is smaller than the upper layer 5 as in this embodiment. In that case, it is preferable that the lower layer 6 having a smaller dimension in plan view than the upper layer 5 is disposed at least in the excretory part facing part and its peripheral part. The “peripheral part of the excretory part facing part” is preferably a part closer to the rear part R than the excretion part facing part, and more preferably a part within 50 mm rearward from the excretion part facing part. . The excretory part-facing part is usually present at a part that is biased toward the front part F side from the central part in the lateral direction Y of the absorbent pad 1A and from the central part in the longitudinal direction X.

The groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 substantially overlap each other in plan view of the absorber 4 as shown in FIG. 9, and the overlapping portion 90 of the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 is The front portion F is open at both side edges along the vertical direction X and has open end portions 91 at both side edges, and the crotch M has a linear portion 92 extending in the vertical direction X, Moreover, the open end 91 and the linear portion 92 are connected. That is, in the present invention (second invention), “the groove 9 in the upper layer and the groove 9 in the lower layer 6 substantially overlap in the plan view of the absorber 4” means that the groove in the upper layer in the plan view of the absorber 4. 9 and the groove 9 of the lower layer 6 need only have a continuous specific shape having the open end portion 91 and the linear portion 92 as described above. 9 and the upper layer groove 9 and the lower layer 6 groove 9 are slightly shifted in plan view, but the overlapping portion 90 has the specific shape. This includes cases where In this embodiment, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 have the same shape and the same dimensions, and the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are completely coincident in plan view. The groove 9 in the upper layer 5 and the groove 9 in the lower layer 6 have a continuous specific shape having an open end portion 91 and a linear portion 92, as in the overlapping portion 90.

In the present embodiment, as shown in FIG. 9, the grooves 9 (overlapping portions 90) of the upper and

lower layers

5, 6 are arranged in front of the longitudinal direction X of the linear portion 91 in the longitudinal direction X and in the lateral direction Y. A bent portion 94 extending outward is provided, and the open end 91 and the linear portion 92 are connected via the bent portion 94. Further, as shown in FIG. 9, the absorbent body 4 (upper layer 5) has front and rear in the longitudinal direction X extending from the rear portion R to the front side in the longitudinal direction X, more specifically, from the front portion F and the crotch M. The side edge along the vertical direction X of the constricted part has a linear side edge 4S1 extending along the vertical direction X and the linear side edge. A bent side edge 4S2 extending from the front end in the vertical direction X of 4S1 to the front in the vertical direction X and outward in the horizontal direction Y is formed. And the bending part 94 of the groove | channel 9 (overlapping part 90) exists in the extension line of this bending side edge 4S2, or its vicinity (within 80 mm from this extension line).

The absorbent pad 1A of the present embodiment can be used by being disposed on the skin facing surface side of the disposable diaper 100 as a separate absorbent article, as shown in FIG. The disposable diaper 100 used in combination with the absorbent pad 1A includes a liquid-permeable surface sheet 101 that forms a skin-facing surface, a liquid-impermeable back sheet 102 that forms a non-skin-facing surface, and a space between both

sheets

101 and 102. The absorbent body 103 is interposed, and is vertically long in one direction like the absorbent pad 1A. A pair of three-dimensional gathers 104 and 104 having elastic members are provided on both sides of the disposable diaper 100 on the skin facing surface side along the longitudinal direction X, and the outer side of the absorbent body 103 in the lateral direction Y is A pair of

leg flap portions

105, 105 having elastic members are provided.

Since the absorbent pad 1A of the present embodiment includes the absorbent body 4 having the characteristic configuration as described above, the absorbent body 4 is deformed as shown in FIG. As a result, it is possible to achieve both the ease of applying to the wearer's crotch, a good wearing feeling, and stable absorption performance. In addition, the code | symbol 200 in FIG. 13 is a crotch (groin part) of the wearer of an absorptive pad. In addition, from the viewpoint of easy explanation, in FIG. 13, some of the constituent members of the absorbent pad 1 A (

core wrap sheets

51, 61, intermediate sheet 10, etc.) are omitted.

In general, a gap is generated between the wearer's excretory part and the absorbent pad (placement part of the absorbent body in the absorbent pad) due to reasons such as an inappropriate wearing method, or the absorbent body around the excretory part is wrinkled. When urine has occurred, excreted fluid such as urine is not absorbed by the absorber in those areas where it is generated, but travels through the wearer's skin to other parts of the absorber, where When concentrated locally and absorbed, the liquid absorption retention capacity of such a concentrated portion of excreted liquid immediately becomes saturated, and liquid leakage is likely to occur. As means for avoiding such inconvenience, as shown in FIGS. 14 (b) and 14 (c), the absorbent body 4 ′ is provided with a groove 9 ′ penetrating the absorbent body 4 ′ in the thickness direction. It is conceivable to provide two along the longitudinal direction X so as to extend from the crotch part to the front throat part. 14 (b) and 14 (c) includes a central absorbent body 7 and a pair of side

absorbent bodies

side absorbers

8 and 8. 14C, the two grooves 9 ′ and 9 ′ extending in the vertical direction X are opened at both ends in the vertical direction along the horizontal direction Y of the absorbent body 4 ′. It differs from the embodiment shown in FIG. 14B which does not have such an open end only in that it has open ends at both ends.

However, the absorbent pad (not shown) having the absorbent body 4 'shown in FIG. 14B or FIG. 14C has the following problems when worn. That is, when the front part of the absorbent pad is gripped by hand and pulled up to the wearer's crotch side as usual in order to wear the absorbent pad having the absorbent body 4 ', FIG. 14 (b) and As shown in FIG. 14 (c), when a pulling force U for pulling up the portion toward the crotch side acts on the front side (upper side in FIG. 14) of the central absorbent body 7 'of the absorbent body 4', the pulling force U Thus, not only the front part side of the central absorbent body 7 but also the front part side of each of the pair of side

absorbent bodies

8, 8 located on both sides thereof is substantially simultaneously with the front part side of the central absorbent body 7. Pulled up. In addition, the pair of side

absorbent bodies

8 and 8 always receive an inward pressing force P by the wearer's thigh at the crotch part (the central part in the longitudinal direction X of the absorbent body 4 ′). It is pushed to the central absorber 7 side. Accordingly, during the pulling up of the absorbent pad to the crotch side, the side absorbent body 8 pulled up almost simultaneously with the central absorbent body 7 is pushed inward in the lateral direction Y by the pressing force P, and the central absorbent body 7. Contact with the side surface (the wall surface defining the groove 9), whereby wrinkles are generated in the central absorbent body 7, or the side absorbent body 8 moves to the skin facing surface side of the central absorbent body 7 And the absorber 4 'may not be bent so as to follow the wearer's ridge. If wrinkles occur in the central absorbent body 7 or the side absorbent bodies 8 overlap the skin-facing surface of the central absorbent body 7, the adhesion between the wearer's excretory part and the absorbent pad cannot be ensured and absorbed. Performance may be reduced.

On the other hand, in the absorbent pad 1A of the present embodiment, the overlapping portion 90 between the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 constituting the absorber 4 has the open end 91 and the straight line as described above. Since it has the continuous specific shape which has the shape part 92, the absorber 4 can be easily bent so that a wearer's ridge part may be followed, FIG.14 (b) and FIG.14 (c) The inconvenience that is anxious about the absorber 4 ′ shown is unlikely to occur. That is, in order to wear the absorbent pad 1A of the present embodiment including the absorbent body 4 (upper layer 5 and lower layer 6), the front portion F of the absorbent pad 1A is gripped by hand as usual. As shown in FIG. 14 (a), a lifting force U for lifting the portion to the crotch side acts on the front part F side (upper side in FIG. 14) of the central absorbent body 7 of the absorbent body 4 as shown in FIG. 14 (a). Sometimes, by the lifting force U, first, the front portion F side of the central absorbent body 7 is pulled up to the crotch side, and then a pair of pairs located on both sides thereof with a slight delay from the front portion F side of the central absorbent body 7. The front portion F side of each of the side absorbers 8 and 8 (the portion near the open end 91 in the side absorber 8 of each of the upper layer 5 and the lower layer 6) is pulled up to the crotch side. And as above-mentioned, a pair of

side part absorbers

8 and 8 are always receiving the inward pressing force P by a wearer's thigh in the crotch lower part M (refer FIG. 9), respectively. When it is pushed to the central absorbent body 7 side while being pulled up, the front part F side of the central absorbent body 7 is pulled up ahead of the front part F side of the side absorbent body 8, whereby the side absorbent body 8 is located above the front portion F side of 8 and is not located on the side of the front portion F side of the side absorbent body 8. As shown in FIG. 13, the front portion F side of the body 8 moves to the non-skin facing surface side of the central absorbent body 7 and overlaps therewith. In FIG. 14A, only a part of the absorber 4 (overlap portion between the upper layer 5 and the lower layer 6) is schematically illustrated from the viewpoint of easy explanation.

Moreover, when the front part F side of the absorber 4 (the upper layer 5 and the lower layer 6) is pulled up to the wearer's inseam side, the wearer's skin surface of each of the pair of

side absorbers

8 and 8 in the upper layer 5 Due to friction with the inner crotch, a resistance force against pulling acts, whereby a shearing force acts between the upper layer 5 and the lower layer 6 and the

layers

5 and 6 try to separate in the vertical direction. If the upper layer 5 and the lower layer 6 are directly overlapped without the intermediate sheet 10 interposed therebetween, the two

layers

5 and 6 can be separated easily without resisting the separating action of the two

layers

5 and 6 in the vertical direction. The groove 9 may be displaced. On the other hand, in the absorbent pad 1A of the present embodiment, as described above, the intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, and each of these

layers

5, 6 and the intermediate sheet 10 are joined. Therefore, the pull-up operation of the absorbent pad 1A toward the skin side makes it difficult for the two

layers

5 and 6 to be separated in the vertical direction, and the shift of the groove 9 hardly occurs.

In short, the absorbent pad 1A of the present embodiment is first placed after the absorbent pad 1A is pulled up to the wearer's crotch side while being disposed on the skin facing surface side of the disposable diaper 100 as shown in FIG. By pulling up the diaper 100, the portions near the open end 91 in the side absorbent bodies 8 of the upper layer 5 and the lower layer 6 constituting the absorbent body 4 are located on the non-skin facing surface side of the central absorbent body 7 of the lower layer 6. It moves integrally and overlaps with it, and it fits along the wearer's ridge part by deformation of the absorber 4 so that it can adhere to the excretion part of the wearer without gaps or wrinkles. Therefore, it is possible to achieve both ease of application to the wearer's crotch, good wearing feeling and stable absorption performance.

In particular, in the present embodiment, as shown in FIGS. 9 and 11, the groove 9 is a straight line extending in the longitudinal direction X at least at the rear part of the crotch part M (the part near the rear part R of the crotch part M). The groove 9 (overlapping portion 90) in the rear portion of the crotch M is a linear shape extending in the longitudinal direction X in plan view. On the other hand, the groove in the rear part of the crotch M is not a linear shape extending in the longitudinal direction X in plan view, but has a bent portion and faces the side edge along the longitudinal direction X of the absorber 4. When the absorbent pad is formed, since the force from the inner crotch portion decreases as the crotch part M is located rearward when the absorbent pad is worn, the portion located in the rear part of the crotch part M in the groove has a certain amount. It becomes a liquid diffusion guide path having a width, and it is easy to guide the liquid to the side edge of the absorber or the vicinity thereof. And if a liquid concentrates in the side edge vicinity of an absorber, since the absorptive material which comprises an absorber (absorbent core) will reach saturation easily, a liquid will overflow from an absorber and it will be easy to lead to a leak. As in the present embodiment, since the groove 9 (overlapping portion 90) in the rear portion of the crotch M has a linear shape extending in the longitudinal direction X in plan view, such inconvenience is effectively prevented.

In the crotch M, if the length (width) in the lateral direction Y of the lower layer 6 (lower absorbent core 60) is equal to or smaller than that of the upper layer 5 (upper absorbent core 50), absorption occurs. When wearing the sexual pad 1A, a relatively rigid member such as an absorbent body comes into contact with the wearer's skin on a smooth surface, thereby effectively preventing concentration of pressure. On the contrary, if the width of the upper layer 5 is smaller than the width of the lower layer 6, the surface on which a step due to the width of the both

layers

Moreover, in this embodiment, the groove | channel 9 is formed only in the front part F and the crotch part M in the absorber 4, and is not formed in the back part R. The reason is that when the overlap or wrinkle between the upper layer 5 and the lower layer 6 described above occurs in the rear portion R, particularly the portion located below the wearer's buttocks when worn, pressure is locally applied to the wearer's skin. It is easy to cause skin trouble. If a groove is formed in the rear portion R (the portion to which the load of the buttocks is applied when worn), the groove has a force in the direction of narrowing its width (the length in the direction perpendicular to the length direction of the groove). Since the groove is hardly applied, the groove retains its shape as a step when the absorbent pad is worn, and the groove is easily overlapped by the force applied when wearing or changing the posture. As a result, body pressure is applied to the groove. Concentrates easily and causes skin problems. Therefore, in order to avoid such inconvenience and to make the above-described operation and effect more reliable, the rear portion R (the portion to which the load of the buttocks is applied when worn) is absorbed as in this embodiment. It is preferable not to provide an opening end portion of the groove at both side edges along the longitudinal direction of the absorbent body 4 such as a groove penetrating the body 4 (upper layer 5 and lower layer 6) in the thickness direction and an opening end portion 91. .

The deformation of the absorber 4 as shown in FIG. 13, that is, “the side absorber 8 bends in the groove 9 and the portions near the open end 91 in the side absorber 8 of each of the upper layer 5 and the lower layer 6 are the lower layer. From the point of view of making sure that “6 move to the non-skin facing surface side of the central absorbent body 6 and overlap it”, the width 9W of the groove 9 (see FIG. 11; the length direction of the groove 9 and Is preferably larger than the thickness of the absorbent body 4 under no pressure. In the absorber 4 under no pressure, the ratio of the width 9W of the groove 9 to the thickness of the absorber 4 (width 9W / thickness of the absorber 4) is preferably 2.0 or more, more preferably 4.0 or more, And preferably it is 10.0 or less, More preferably, it is 7.0 or less, More specifically, Preferably it is 2.0 or more and 10.0 or less, More preferably, it is 4.0 or more and 7.0 or less. Here, the thickness under no pressure means the thickness under a pressure of 0.5 cN / cm ³ obtained by the following measurement method.

The width 9W of the groove 9 is preferably 5 mm or more, more preferably 10 mm or more, and preferably 40 mm or less, more preferably 30 mm or less, more specifically preferably 5 mm or more and 40 mm or less, more preferably 10 mm or more and 30 mm. It is as follows. In the present embodiment, in each of the upper layer 5 and the lower layer 6, the width 9W of the groove 9 is constant over the entire length, and as described above, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are Same shape and size.
The thickness of the absorber 4 under no pressure (the total thickness of the upper layer 5 and the lower layer 6 under no pressure) is preferably 1.0 mm or more, more preferably 2.0 mm or more, and preferably 10. It is 0 mm or less, More preferably, it is 7.0 mm or less, More specifically, Preferably it is 1.0 mm or more and 10.0 mm or less, More preferably, it is 2.0 mm or more and 7.0 mm or less.

side part absorbers

8 and 8 in the center absorber 7 of each of the upper layer 5 and the lower layer 6 The length (width) 71W (see FIG. 11) in the lateral direction Y of the sandwiched portion (band-like portion 71) is preferably set to be equal to or smaller than the wearer's crotch width, more specifically 70 mm or less, particularly 50 mm. It is preferable to set the following. On the other hand, from the viewpoint of stably adhering the excretion part of the wearer and the absorbent pad 1A, the length 71W of the belt-like portion 71 is preferably set to 20 mm or more, particularly 30 mm or more. Therefore, the length 71W in the lateral direction Y of the belt-like portion 71 of the central absorbent body 7 is preferably 20 mm or greater and 70 mm or less, and more preferably 30 mm or greater and 50 mm or less. In the present embodiment, the upper layer 5 and the lower layer 6 have the same length 71W of the belt-like portion 71.

The absorbent pad 1A of the present embodiment will be further described. As shown in FIGS. 9 and 10, the left and right side portions along the longitudinal direction X of the main body 15 are at least worn by the wearer's skin at the excretory portion facing portion B. A pair of three-dimensional gathers 20, 20 standing up toward the side is provided. The three-dimensional gather 20 stands up with the main body 15 side as a base end and a free end on the skin side of the wearer, and is connected to the base wall portion 21 and the upper end portion of the base wall portion 21 in the vertical direction. The elastic member 25 is comprised along the X along with the elastic expansion-contraction part 22 arrange | positioned in the expansion | extension state.

The three-dimensional gather 20 includes a single side sheet 26 having a certain width in the longitudinal direction X in addition to the elastic member 25. The side sheet 26 has a base wall as shown in FIG. The portion 21 and the upper end portion thereof are folded back so as to have a shape in which an elastic stretchable portion 22 is continuously provided. Therefore, the three-dimensional gather 20 formed by folding the side sheet 26 has a two-layer structure in the base wall portion 21 and the elastic stretchable portion 22 as shown in FIG. The

side sheets

As shown in FIG. 10, the base wall 21 is joined to the skin facing surface of the main body 15 (skin facing surface of the topsheet 2) above the absorber 4, and the joint 23 is the base end. And it has the standing part 24 which stands up toward a wearer's skin side at the time of wear by using the elastic elastic part 22 (tip part of the elastic elastic part 22) as the free end. Portions other than the standing portion 24 in the base wall portion 21 are wound down along the side edge along the longitudinal direction X of the absorber 4, and further extend outward in the lateral direction Y from the side edge of the absorber 4. The extension part is joined to the extension part from the side edge of the absorbent body 4 in the back sheet 3 by a known joining means such as an adhesive or heat seal. A joint portion 23 (the base end) between the base wall portion 21 (standing portion 24) and the topsheet 2 (main body 15) is linear in a plan view, and has a substantially total length of the three-dimensional gather 20 along the vertical direction X. It extends over. The joint portion 23 is formed by applying an adhesive such as a hot melt adhesive. The linear joint portion 23 may be a continuous line in which the adhesive is continuously applied along the longitudinal direction X, or may be a broken line in which the adhesive is applied discontinuously. It can be a straight line or a curved line. The linear joint 23 in the present embodiment is a straight line and a continuous line.

side sheets

26 and 26 by an adhesive (not shown).

As shown in FIG. 9, in the front part F and the rear part R, the elastic stretchable part 22 at the end in the longitudinal direction X of the three-dimensional gather 20 is joined to the main body 15 (surface sheet 2), and its stretchability is obstructed. The three-dimensional gathered non-expandable portion 27 is formed. The absorbent pad 1A includes a pair of left and right three-dimensional gathers 20 that extend along the longitudinal direction X of the main body 15 and are joined to the main body 15 at the front and rear ends in the vertical direction X, respectively. By forming 27, it curves between the

non-expandable portions

27, 27 in a natural state. In the absorbent pad 1A, the entire shape in the vertical direction X is curved in a concave shape on the skin facing surface side (surface sheet 2 side) in a natural state due to the contraction of the elastic stretchable portion 22.

Thus, in the present embodiment, when each part of the absorbent pad 1A is extended so that the absorbent pad is expanded in a planar shape as shown in FIG. A certain elastic expansion / contraction part 22 (the tip part of the elastic expansion / contraction part 22) is located outward in the lateral direction Y from the linear part 92 of the groove 9. With such a configuration, as described above, the absorbent body 4 is deformed by the lifting operation of the absorbent pad 1A when the absorbent pad 1A is worn, and a part of the side absorbent body 8 is formed as shown in FIG. When it moves to the non-skin facing surface side of the central absorbent body 7 and overlaps with it, the contact position between the wearer's excretory part and the arrangement area of the central absorbent body 7 in the absorbent pad 1A is in the lateral direction Y. Even if it is slightly deviated, the three-dimensional gather 20 does not cover the upper part of the central absorbent body 7, and therefore, the disadvantage that the liquid absorbent is retained by the central absorbent body 7 is effectively prevented.

Moreover, in this embodiment, the junction part 23 which is the said base end of the three-dimensional gather 20 follows the vertical direction X of the side part absorber 8 of the upper layer 5 in planar view of the absorbent pad 1A as shown in FIG. It overlaps with the side edge 8s or its vicinity. Further, the joint portion 23 extends in parallel to the linear portion 92 of the groove 9. Here, “the vicinity of the side edge 8 s of the side absorber 8 of the upper layer 5” is a region within 8 mm inward in the lateral direction Y from the side edge 8 s of the side absorber 8 of the upper layer 5. Is part of. With such a configuration, the joint 23 that is the base of the three-dimensional gather 20 can follow the movement of the side absorbent body 8 toward the central absorbent body 7 due to the pulling-up operation when the absorbent pad 1A is worn. At the same time, the elastic expansion / contraction part 22 (the tip part of the elastic expansion / contraction part 22), which is the free end of the three-dimensional gather 20, can surely approach the wearer's ridge part, whereby the elastic expansion / contraction part 22 is Adhesiveness to the ridge portion is increased. Further, when the joint portion 23 of the three-dimensional gather 20 overlaps the side edge 8s of the side absorbent body 8 of the upper layer 5 or the vicinity thereof, the excretory fluid such as urine is absorbed by the skin facing surface of the absorbent pad 1A. Since a possible wide absorption surface can be secured, the absorption performance can be further improved.

The material for forming each part in the absorbent pad 1A will be described. As the top sheet 2 and the back sheet 3, various kinds of materials conventionally used in the technical field can be used without particular limitation. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. The back sheet 3 may be liquid-impermeable or liquid-permeable, for example, a resin film that does not have moisture permeability, a resin film that has micropores and moisture permeability, and a nonwoven fabric such as a water-repellent nonwoven fabric, A laminate of the sheet and other sheets can be used.

The upper layer 5 (upper layer absorbent core 50) and the lower layer 6 (lower layer absorbent core 60) may have the same composition or different compositions. In the latter case, the upper layer 5 and the lower layer 6 excrete liquid such as urine. The function for can be different. For example, if the upper absorbent core 50 contains more wood pulp than the water absorbent polymer and the lower absorbent core 60 makes the water absorbent polymer contain more wood pulp, The upper layer 5 has an excellent liquid diffusing function, and the lower layer 6 has an excellent liquid holding function. The upper layer 5 can share functions such as mainly liquid diffusion and the lower layer 6 mainly having liquid holding. Furthermore, in such a configuration, if the intermediate sheet 10 interposed between the upper layer 5 and the lower layer 6 is excellent in liquid diffusibility, the liquid diffusibility as a whole of the absorber 4 can be further improved. Examples of the intermediate sheet 10 having excellent liquid diffusibility include paper containing 10% by mass or more of hydrophilic fibers that are bulky, such as crosslinked pulp, rayon, and mercerized pulp.

sheet

As the intermediate sheet 10, a sheet having a color different from that of each constituent member (surface sheet 2, upper layer 5, etc.) of the absorbent pad 1 A disposed on the skin facing surface side can be used. Different colors may be used. For example, when the intermediate sheet 10 is colored in a different color from the top sheet 2 and the upper layer 5 (upper absorbent core 50 and upper core wrap sheet 51), the absorbent pad 1A is viewed from the top sheet 2 side. If the coloring of the intermediate sheet 10 is made visible through the groove 9, the positioning at the time of wearing becomes easy, and the work burden on the wearer is reduced.

As mentioned above, although this invention (2nd invention) was demonstrated based on the preferable embodiment, this invention (2nd invention) is not restrict | limited to the said embodiment. For example, in the above embodiment, in the upper layer 5, only the skin facing surface of the upper absorbent core 50 is covered by one upper core wrap sheet 51, and in the lower layer 6, the skin facing surface of the lower absorbent core 60 and On the contrary, in the upper layer 5, both the skin facing surface and the non-skin facing surface of the upper absorbent core 50 are coated on both surfaces of the non-skin facing surface. It may be covered with one upper core wrap sheet 51, and in the lower layer 6, only the skin facing surface of the lower absorbent core 60 may be covered with one lower core wrap sheet 61, or both

layers

In the embodiment, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 have the same shape and the same size, and the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are completely coincident in plan view. However, instead of such a configuration, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are similar in shape in plan view, and the groove 9 of the lower layer 6 is compared with the groove 9 of the upper layer 5. Thus, the length and width may be increased. Thus, when the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are similar to each other, when the absorbent pad 1A is bent at the groove 9 (overlapping portion 90) and deformed three-dimensionally, the upper layer Between the portions where the grooves 9 of the upper and

lower layers

5 and 6 are not formed around the low-rigidity portion where the groove 9 of the lower layer 6 and the groove 9 of the lower layer 6 overlap each other. Since the buffer portion having a lower rigidity than the overlapping portion (high rigidity portion) is formed, the curvature of the bent portion that is formed by the groove 9 being crushed or overlapping when the pad 1A is deformed becomes smooth. The pad 1A becomes easier to follow along the wearer's body, and the uncomfortable feeling is reduced.

The following additional notes (absorbent pads) are further disclosed regarding the above-described embodiments of the present invention (first invention, second invention).

<1>
A body comprising a top sheet that forms a skin facing surface, a back sheet that forms a non-skin facing surface, and an absorbent body interposed between the two sheets, and perpendicular to the longitudinal direction corresponding to the wearer's longitudinal direction An absorbent pad having a transverse direction,
The absorbent body is disposed on the crotch part that is disposed opposite to the crotch of the wearer when worn, a front part that is disposed on the abdomen side of the wearer from the crotch part, and a back side of the wearer than the crotch part And includes a laminated structure composed of an upper layer and a lower layer disposed on the non-skin facing surface side of the upper layer,
Each of the upper layer and the lower layer includes a central absorber and a pair of side absorbers provided on both sides of the central absorber, and each of the central absorber and the pair of side absorbers. And having a groove that penetrates the layer in the thickness direction,
The groove in the upper layer does not overlap with the central absorber and the side absorber in the lower layer, but overlaps the groove in the lower layer,
The groove in the upper layer has a linear portion extending in the vertical direction at the crotch portion in plan view, and a bent portion extending in the vertical direction forward and laterally outward from the vertical front end of the linear portion. Having absorbent pad.

<1-2>
The absorbent pad according to <1>, wherein at least one of the groove in the upper layer and the groove in the lower layer is not open to a peripheral edge portion of the absorber and has a closed end portion.
<2>
The absorbent pad according to <1> or <1-2>, wherein at least the groove of the upper layer is not opened at a peripheral edge of the absorbent body and has a closed end.
<2-2>
Only the groove of the lower layer has a closed end without being opened to the peripheral edge of the absorber, and the upper layer is open to a side edge that is a part of the peripheral edge, The absorbent pad according to <1> or <1-2>, which has an open end at an edge.
<3>
Both of the groove in the upper layer and the groove in the lower layer are not opened to the peripheral edge portion of the absorber and have closed ends, wherein any one of the above items <1> to <2> Absorbent pad.
<3-2>
The absorptivity according to any one of <1> to <3>, wherein a side portion along the longitudinal direction of the absorber is configured by a laminated structure including the side absorbers of the upper layer and the lower layer, respectively. pad.
<3-3>
Any one of the above <1> to <3>, wherein the side portion along the longitudinal direction of the absorber includes only one side absorber of either the upper layer or the lower layer. The absorbent pad as described.

<4>
The absorbent pad according to <1>, wherein both the groove in the upper layer and the groove in the lower layer are open to a peripheral edge portion of the absorber.
<5>
The central absorbent body of each of the upper layer and the lower layer has a substantially isosceles table in plan view in which the length in the lateral direction gradually decreases from the front part toward the crotch part in a region extending from the front part to the crotch part. A planar portion having a constant width in a plan view, and the belt-like portion is connected to a portion having a relatively short width in the isosceles trapezoidal portion so that both portions are integrally formed; The absorbent pad as described in <4>.
<6>
The pair of side absorbers of each of the upper layer and the lower layer sandwich the central absorber so as to be along the side edges along the vertical direction of the isosceles trapezoidal portion and the belt-like portion of the central absorber. The absorbent pad according to <5>, wherein the absorbent pad is provided symmetrically and is connected to the central absorbent body at the crotch portion so that the side absorbent body and the central absorbent body are integrally formed.

<7>
The groove in the upper layer and the groove in the lower layer are similar in shape in plan view, and the groove in the lower layer is larger in length and width than the groove in the upper layer. The absorbent pad according to any one of 1> to <6>.
<8>
The width 9WB of the groove in the lower layer is larger than the width 9WA of the groove in the upper layer, and the ratio between them (width 9WA / width 9WB) is preferably 1.1 or more, more preferably 1.3 or more. The absorbent pad according to any one of <1> to <7>, wherein
<9>
The width 9WB of the groove in the lower layer is larger than the width 9WA of the groove in the upper layer, and the ratio between the two (width 9WA / width 9WB) is preferably 2.0 or less, more preferably 1.8 or less. The absorbent pad according to any one of <1> to <8>, wherein
<10>
The groove in the lower layer straddles the side edge along the longitudinal direction of the side absorber of the upper layer, whereby the side portion along the longitudinal direction of the absorber is in order from the lateral outer side. <1> to <9, comprising the side absorber of the lower layer and the side absorber of the upper layer, and including only one of the upper layer and the lower layer The absorbent pad according to any one of>.
<11>
The absorbent pad according to any one of <1> to <10>, wherein a width of the groove of the upper layer is larger than a thickness of the absorbent body under no pressure.
<12>
In the absorber under no pressure, the ratio of the width of the groove in the upper layer to the thickness of the absorber (the width of the overlapping portion / the thickness of the absorber) is preferably 2.0 or more, more preferably 4. The absorbent pad according to any one of <1> to <11>, which is 0 or more.
<13>
In the absorber under no pressure, the ratio of the width of the groove in the upper layer to the thickness of the absorber (the width of the overlapping portion / the thickness of the absorber) is preferably 10.0 or less, more preferably 7. The absorbent pad according to any one of <1> to <12>, which is 0 or less.

<14>
The absorbent pad according to any one of <1> to <13>, wherein an intermediate sheet is interposed between the upper layer and the lower layer, and each of these layers and the intermediate sheet are joined.
<15>
The intermediate sheet has a color different from that of the top sheet and the upper layer, and when the absorbent pad is viewed from the top sheet side, the color of the intermediate sheet is visible through the grooves in the upper layer. The absorbent pad according to <14>, which is made.
<16>
The absorbent body has a constricted portion on the front side in the longitudinal direction from the rear portion, and has a constricted portion whose length in the horizontal direction is shorter than that in the longitudinal direction, and on the side edge along the longitudinal direction of the constricted portion in the longitudinal direction. A straight side edge extending along and a bent side edge extending longitudinally forward and laterally outward from the longitudinal front end of the straight side edge, on or near the extension line of the bent side edge, The absorbent pad according to any one of <1> to <15>, wherein the bent portion exists.
<17>
A pair of three-dimensional gathers that stand toward the wearer's skin when worn at least in the crotch portion are provided on both left and right side portions along the longitudinal direction of the main body, and the three-dimensional gathers are based on the main body side. It stands up to make a free end on the skin side of the wearer,
When each part of the absorbent pad is extended to be in a developed state in which the absorbent pad is expanded in a planar shape, the free end of the three-dimensional gather is positioned laterally outward from the linear part. The absorbent pad according to any one of <1> to <16>.

<18>
The base end of the three-dimensional gather overlaps with the side edge or the vicinity thereof along the longitudinal direction of the side absorber of the upper layer in a plan view of the absorbent pad, and is parallel to the linear portion. The absorbent pad as described in <17>.
<19>
One of the upper layer and the lower layer is the absorbent pad according to any one of <1> to <18>, wherein one of the upper layer and the lower layer extends outward in the vertical direction from the vertical end on the front portion side.
<20>
An intermediate sheet is interposed between the upper layer and the lower layer, and the intermediate sheet is one of the upper layer and the lower layer that extends outward in the vertical direction from the vertical end on the front portion side in the other. The absorbent pad as described in <19> above, which covers the entire area of the absorbent core mainly composed of a water-absorbing material.
<21>
The absorbent pad according to any one of <1> to <20>, wherein a dimension of the lower layer in plan view is equal to or smaller than the dimension of the upper layer.
<22>
By the lifting operation of the absorbent pad when the absorbent pad is worn, the side absorbent bodies of the upper layer and the lower layer move integrally to the non-skin facing surface side of the central absorbent body of the lower layer. The absorbent pad according to any one of <1> to <21>, wherein the absorbent pad is configured to overlap therewith.

<23>
The absorbent pad according to any one of <1> to <22>, wherein the groove is formed only in the front part and the crotch part in the absorbent body and is not formed in the rear part. .
<24>
The absorbent pad according to any one of <1> to <23>, wherein the bent portion is shorter in the length direction of the groove than the linear portion.
<25>
The absorbent pad according to any one of <1> to <24>, wherein in each of the upper layer and the lower layer, the width of the groove is constant over the entire length thereof.
<26>
The upper layer (upper absorbent core) contains more wood pulp than the water absorbent polymer, and the lower layer (lower absorbent core) contains more water absorbent polymer than the wood pulp <1 The absorbent pad according to any one of> to <25>.

<27>
The absorbent pad according to any one of <1> to <26>, wherein the absorbent pad is used by being disposed on the skin facing surface side of a separate absorbent article.
<28>
The absorbent article comprises a liquid-permeable surface sheet that forms a skin-facing surface, a liquid-impermeable back sheet that forms a non-skin-facing surface, and an absorber interposed between both sheets,
A pair of three-dimensional gathers having elastic members are provided on both sides along the longitudinal direction of the skin facing surface side,
The absorbent pad and absorbent article according to <27>, wherein a pair of leg flap portions having an elastic member is provided laterally outward of the absorbent body.
<29>
The absorbent pad is attached to the wearer's body by being pulled up from the crotch of the wearer to the abdomen in a state of being disposed on the skin facing surface side of the absorbent article, and after the absorbent pad is attached The absorbent pad according to <27> or <28>, wherein the absorbent article is pulled up, and the method for mounting the absorbent article.

According to the present invention, there is provided an absorbent pad that can be easily applied to the wearer's crotch, has a good wearing feeling, and has excellent absorption performance.

Claims

A body comprising a top sheet that forms a skin facing surface, a back sheet that forms a non-skin facing surface, and an absorbent body interposed between the two sheets, and perpendicular to the longitudinal direction corresponding to the wearer's longitudinal direction An absorbent pad having a transverse direction,
The absorbent body is disposed on the crotch part that is disposed opposite to the crotch of the wearer when worn, a front part that is disposed on the abdomen side of the wearer from the crotch part, and a back side of the wearer than the crotch part. And includes a laminated structure composed of an upper layer and a lower layer disposed on the non-skin facing surface side of the upper layer,
Each of the upper layer and the lower layer includes a central absorber and a pair of side absorbers provided on both sides of the central absorber, and each of the central absorber and the pair of side absorbers. And having a groove that penetrates the layer in the thickness direction,
The groove in the upper layer does not overlap with the central absorber and the side absorber in the lower layer, but overlaps the groove in the lower layer,
The groove in the upper layer has a linear portion extending in the vertical direction at the crotch portion in plan view, and a bent portion extending in the vertical direction forward and laterally outward from the vertical front end of the linear portion. Having absorbent pad.
2. The absorbent pad according to claim 1, wherein at least one of the groove in the upper layer and the groove in the lower layer is not open to a peripheral edge portion of the absorbent body and has a closed end portion.
3. The absorbent pad according to claim 1, wherein at least the groove of the upper layer is not opened at a peripheral edge of the absorber and has a closed end.
The absorbent pad according to claim 1, wherein both the groove in the upper layer and the groove in the lower layer have a closed end without being opened to the peripheral edge of the absorber.
The central absorbent body of each of the upper layer and the lower layer has a substantially isosceles table in plan view in which the length in the lateral direction gradually decreases from the front part toward the crotch part in a region from the front part to the crotch part. A planar portion having a constant width in plan view, and the belt-like portion is connected to a portion having a relatively short width in the isosceles trapezoidal portion, and both portions are integrally formed. Item 5. The absorbent pad according to Item 4.
The pair of side absorbers of each of the upper layer and the lower layer sandwich the central absorber so as to be along the side edges along the vertical direction of the isosceles trapezoidal portion and the belt-like portion of the central absorber. The absorbent pad according to claim 5, wherein the absorbent pad is provided symmetrically, and is connected to the central absorbent body at the crotch portion so that the side absorbent body and the central absorbent body are integrally formed.
The groove in the upper layer and the groove in the lower layer are similar to each other in shape in plan view, and the groove in the lower layer has a longer length and width than the groove in the upper layer. The absorbent pad according to any one of 1 to 6.
The width 9WB of the groove in the lower layer is larger than the width 9WA of the groove in the upper layer, and the ratio between the two (width 9WA / width 9WB) is 1.1 or more. The absorbent pad according to one item.
The width 9WB of the groove in the lower layer is larger than the width 9WA of the groove in the upper layer, and the ratio between the two (width 9WA / width 9WB) is 1.3 or more. The absorbent pad according to one item.
The width 9WB of the groove in the lower layer is larger than the width 9WA of the groove in the upper layer, and the ratio (width 9WA / width 9WB) of both is 2.0 or less. The absorbent pad according to one item.
The width 9WB of the groove in the lower layer is larger than the width 9WA of the groove in the upper layer, and the ratio (width 9WA / width 9WB) of both is 1.8 or less. The absorbent pad according to one item.
The groove in the lower layer straddles the side edge along the longitudinal direction of the side absorber of the upper layer, whereby the side portion along the longitudinal direction of the absorber is in order from the lateral outer side. 12. The side absorber of the lower layer and the side absorber of the upper layer, and any one of the upper layer and the lower layer is included. An absorbent pad according to claim 1.
The absorbent pad according to any one of claims 1 to 12, wherein a width of the groove in the upper layer is larger than a thickness of the absorber under no pressure.
14. In the absorber under no pressure, the ratio of the width of the groove in the upper layer to the thickness of the absorber (the width of the overlapping portion / the thickness of the absorber) is 2.0 or more. An absorptive pad given in any 1 paragraph.
15. In the absorber under no pressure, the ratio of the width of the groove in the upper layer to the thickness of the absorber (overlap width / absorber thickness) is 4.0 or more. An absorptive pad given in any 1 paragraph.
In the absorber under no pressure, the ratio of the width of the groove of the upper layer to the thickness of the absorber (width of overlapping portion / thickness of the absorber) is 10.0 or less. An absorptive pad given in any 1 paragraph.
In the absorber under no pressure, the ratio of the width of the groove in the upper layer to the thickness of the absorber (width of overlapping portion / thickness of the absorber) is 7.0 or less. An absorptive pad given in any 1 paragraph.
The absorbent pad according to any one of claims 1 to 17, wherein an intermediate sheet is interposed between the upper layer and the lower layer, and each of these layers and the intermediate sheet are joined.
The intermediate sheet has a color different from that of the top sheet and the upper layer, and when the absorbent pad is viewed from the top sheet side, the color of the intermediate sheet is visible through the grooves in the upper layer. The absorbent pad according to claim 18 made.
The absorbent body has a constricted portion on the front side in the longitudinal direction from the rear portion, the constricted portion having a short length in the lateral direction compared to the longitudinal direction, and on the side edge along the longitudinal direction of the constricted portion in the longitudinal direction. A straight side edge extending along and a bent side edge extending longitudinally forward and laterally outward from the longitudinal front end of the straight side edge, on or near the extension line of the bent side edge, The absorbent pad according to any one of claims 1 to 19, wherein the bent portion exists.
A pair of three-dimensional gathers that stand toward the wearer's skin when worn at least in the crotch portion are provided on both left and right side portions along the longitudinal direction of the main body, and the three-dimensional gathers are based on the main body side. It stands up to make a free end on the skin side of the wearer,
When each part of the absorbent pad is extended to be in a developed state in which the absorbent pad is expanded in a planar shape, the free end of the three-dimensional gather is positioned laterally outward from the linear part. The absorbent pad according to any one of claims 1 to 20.
The base end of the three-dimensional gather overlaps with a side edge or the vicinity thereof along the longitudinal direction of the side absorber of the upper layer in a plan view of the absorbent pad, and is parallel to the linear portion. The absorbent pad according to claim 21.
The absorbent pad according to any one of claims 1 to 22, wherein one of the upper layer and the lower layer extends outward in the vertical direction from the vertical end on the front portion side in the other.
An intermediate sheet is interposed between the upper layer and the lower layer, and the intermediate sheet is one of the upper layer and the lower layer that extends outward in the vertical direction from the vertical end on the front portion side in the other. 24. The absorbent pad according to claim 23, which covers the entire area of the absorbent core mainly composed of a water-absorbing material.
The absorbent pad according to any one of claims 1 to 24, wherein a dimension of the lower layer in plan view is equal to or smaller than the dimension of the upper layer.
By the lifting operation of the absorbent pad when the absorbent pad is worn, the side absorbent bodies of the upper layer and the lower layer move integrally to the non-skin facing surface side of the central absorbent body of the lower layer. The absorbent pad according to any one of claims 1 to 25, wherein the absorbent pad is adapted to overlap therewith.
The absorbent pad according to any one of claims 1 to 26, wherein the groove is formed only in the front part and the crotch part in the absorbent body and is not formed in the rear part.
The absorbent pad according to any one of claims 1 to 27, wherein the bent portion is shorter in the length direction of the groove than the linear portion.
The absorbent pad according to any one of claims 1 to 28, wherein in each of the upper layer and the lower layer, the width of the groove is constant over the entire length thereof.
The absorbent according to any one of claims 1 to 29, wherein the upper layer contains more wood pulp than the water-absorbing polymer, and the lower layer contains more water-absorbing polymer than the wood pulp. pad.
The absorbent pad according to any one of claims 1 to 30, wherein the absorbent pad is used by being disposed on the skin facing surface side of a separate absorbent article.
The absorbent article comprises a liquid-permeable surface sheet that forms a skin-facing surface, a liquid-impermeable back sheet that forms a non-skin-facing surface, and an absorber interposed between both sheets,
A pair of three-dimensional gathers having elastic members are provided on both sides along the longitudinal direction of the skin facing surface side,
32. The absorbent pad and absorbent article according to claim 31, wherein a pair of leg flap portions having an elastic member is provided laterally outward of the absorbent body.
The absorbent pad is attached to the wearer's body by being pulled up from the crotch of the wearer to the abdomen in a state of being disposed on the skin facing surface side of the absorbent article, and after the absorbent pad is attached The absorbent pad and the absorbent article mounting method according to claim 31 or 32, wherein the absorbent article is pulled up.