WO2020075653A1

WO2020075653A1 - Absorbent article

Info

Publication number: WO2020075653A1
Application number: PCT/JP2019/039377
Authority: WO
Inventors: 瑶介曽我部; 夏美大村; 黒田　賢一郎; 野田　祐樹
Original assignee: ユニ・チャーム株式会社
Priority date: 2018-10-09
Filing date: 2019-10-04
Publication date: 2020-04-16
Also published as: JP2019198618A; CN112839616B; TW202023504A; CN112839616A; JP7018863B2; TWI811469B

Abstract

Provided is an absorbent article capable of improving absorbency while improving texture. An absorbent article (1) has, layered in the stated order in the thickness direction, a front surface sheet (2), an auxiliary sheet (5), an absorbent body (4), a rear surface sheet (3), and a fixing section (7). The width direction dimension of the front surface sheet is less than the width direction dimension of the auxiliary sheet. The front surface sheet has a central region (CA) that is located in the center thereof in the width direction, and a pair of edge regions (EA, EA) that are adjacent to the central region on both sides thereof in the width direction. The central region is bonded to the auxiliary sheet, and at least a portion of the pair of edge regions is not bonded to the auxiliary sheet. The central region of the front surface sheet has a plurality of pores (15).

Description

Absorbent article

The present invention relates to absorbent articles.

Absorbent articles having openings in the surface sheet are known to efficiently absorb liquid excretion. For example, in Patent Document 1, a topsheet is applied to the topsheet in a state of being stretched along the longitudinal direction, and a plurality of elastic members arranged at intervals in the lateral direction and adjacent elastic members are provided. Disclosed is an absorbent article including a plurality of cut rows provided therebetween. Each cut row is provided with a plurality of cut portions provided at intervals in the vertical direction, and the contraction force of the elastic member causes the top sheet to contract in the vertical direction, whereby the top sheet is deformed to form an uneven structure. And the notches are opened to form a plurality of openings.

JP, 2009-45334, A

The absorbent article of Patent Document 1 has a configuration in which, when the absorbent article is used, the cut portion of the cut row is opened and a plurality of openings are formed by contraction of the elastic member adjacent to the cut row. Therefore, the cut portion opens or closes depending on the movement of the user's body, and the opening portion is not stable. Such an unstable fluctuation of the opening may cause a stimulus such as friction on the skin and reduce the touch to the skin. Further, when the technique of Patent Document 1 is applied to an absorbent article which is fixed to underwear with a fixing portion such as an adhesive at the time of use and is brought into close contact with the skin, the elastic member is less likely to contract. Therefore, the opening of the cut portion may be difficult to open, and it may be difficult to draw the liquid excrement into the absorbent body, which may reduce the absorption performance.

An object of the present invention is to provide an absorbent article capable of improving the absorption performance while improving the touch.

The absorbent article of the present invention is as follows. (1) An absorbent article having a longitudinal direction, a width direction, and a thickness direction, in which a top sheet, an auxiliary sheet, an absorber, a back sheet, and a fixed portion are laminated in this order in the thickness direction, The dimension of the top sheet in the width direction is smaller than the dimension of the auxiliary sheet in the width direction, and the top sheet has a central region located at the center in the width direction and both outer sides of the central region in the width direction. And a pair of end regions adjacent to each other, the central region is joined to the auxiliary sheet, at least a part of the pair of end regions is not joined to the auxiliary sheet, the surface sheet The central area of the absorbent article having a plurality of holes.

This absorbent article does not open and close depending on the movement of the user's body, but has multiple holes that are open from the beginning. However, the hole portion is a recessed portion of the surface sheet or a portion that penetrates to the opposite side, and includes a recessed portion and a through hole formed by compression. Such a hole can suppress the variation of its shape regardless of the movement of the user's body. As a result, liquid excrement can be efficiently absorbed through the holes, and irritation such as friction on the skin around the holes can be reduced, and thus the touch can be improved. Further, at that time, since the auxiliary sheet has a larger shape in the width direction than the top sheet, both end edges of the auxiliary sheet are located outside the both end edges of the top sheet. As a result, when the absorbent article is used, in the width direction, the both edges of the auxiliary sheet are brought into contact with both thighs earlier than the both edges of the top sheet, and the auxiliary sheet is compressed inward while being compressed (excretion). It can be deformed so that it rises toward the mouth). As a result, the pair of end regions, which are not joined to the auxiliary sheet and are placed on the auxiliary sheet, are deformed so as to stand up further (in the direction of the excretion opening) and become like a pair of wall portions. Can be operated. This can prevent the liquid excrement from diffusing outward in the width direction W and reaching the pair of end regions. That is, it is possible to reduce the contact of the liquid excrement with the user's skin and reduce the burden on the user's skin. As described above, in the absorbent article, it is possible to improve the absorption performance while improving the touch.

In the absorbent article of the present invention, (2) the central region and the pair of end regions of the topsheet have a plurality of pores and are present in the pair of end regions in a plan view. The absorbent article according to (1) above, wherein the area per pore is smaller than the area per pore existing in the central region may be used.
In the absorbent article, the areas of the individual pores present in the pair of end regions on both sides of the topsheet are relatively small in plan view. Therefore, in plan view, the uneven shape formed by the presence or absence of a plurality of pores can be reduced at the widthwise edges of each of the pair of end regions. Thereby, the frictional stimulus to the user's skin due to the uneven shape of the edge of the surface sheet can be reduced, and the touch to the skin can be improved. At the same time, in plan view, the area of each pore existing in the central region of the topsheet is relatively large. Therefore, liquid excretion can be rapidly transferred from the plurality of pores of the topsheet to the absorbent body through the auxiliary sheet, and the absorption performance can be improved. Therefore, in the present absorbent article, it is possible to improve the absorption performance while improving the touch.

In the absorbent article of the present invention, (3) in the topsheet, the area of the pores in the central region and the pair of end regions is 0.01 mm ² or more and 25 mm ² or less in plan view. The absorbent article according to (2) above may be used.
In the absorbent article, since the area of the pores of the topsheet is 0.01 mm ² or more, the effect of passing the liquid excrement can be increased and the absorption performance can be enhanced. Moreover, since the area of the pores is 1 mm ² or less, it is possible to prevent the uneven shape formed by the presence or absence of the pores from being too large, and to reduce the friction stimulus to the user's skin, and thus to improve the skin feel.

In the absorbent article of the present invention, in (4) plane view, the shape of the pores present in the pair of end regions is a shape in which the dimension in the width direction is shorter than the dimension in the longitudinal direction. The absorbent article according to (2) or (3) above may be used.
In the absorbent article, the shape of the pores in the end region of the topsheet has a shape that is long in the longitudinal direction. Therefore, in a plan view, it is possible to reduce the number of partially missing pores present at the widthwise edge of the surface sheet, and the width formed by partially missing pores at the end. The degree of unevenness in the direction can be reduced. Thereby, when the pair of end regions of the topsheet rises to the skin side, the frictional stimulus of the topsheet against the user's skin can be reduced, and thus the touch can be improved.

In the absorbent article of the present invention, (5) the surface sheet is formed of a non-woven fabric, and the fibers present in the end regions among the fibers constituting the non-woven fabric are more than the fibers present in the central region. The absorbent article according to any one of (1) to (4) above, which is oriented in the longitudinal direction, may be used.
In the absorbent article, since the fiber orientation in the central region of the surface sheet formed of the nonwoven fabric is relatively random, liquid excretions excreted in the central region can be diffused almost concentrically. At the same time, since the fiber orientations of the end regions on both sides are relatively oriented in the longitudinal direction, the liquid excrement reaching the end regions on both sides can be diffused substantially in the longitudinal direction. That is, the absorbent article can be used as a whole and the absorption performance can be improved. Further, in the edge regions on both sides of the surface sheet, the number of fibers exposed from the edge to the outside in the width direction is reduced due to the fiber orientation in the longitudinal direction, so that the friction to the skin is reduced and the reduction in the touch is suppressed. it can.

(6) The absorbent article of the present invention further comprises (6) a pair of side sheets provided corresponding to each of both ends in the width direction of the auxiliary sheet, the pair of side sheets being located on the non-skin side of the both ends. The sheet is provided corresponding to each of both ends in the width direction of the auxiliary sheet, and has a pair of hollow wrapping three-dimensional parts configured such that the both ends are wound on the non-skin surface side of the auxiliary sheet. And, in each of the pair of hollow entrained three-dimensional portions, the widthwise end portion of the auxiliary sheet corresponds to the end portion of the pair of side sheets, and the inner end portion in the widthwise direction. The absorbent article according to any one of the above (1) to (5), which is joined to the joint at the joint.
In this absorbent article, the auxiliary sheet has a pair of hollow entrained three-dimensional portions at both ends. Therefore, when the absorbent article is sandwiched in the width direction by the thighs of both legs of the user during use, and the absorber deforms along the shape of the user's crotch, the pair of hollow entrained three-dimensional parts are It can be easily deformed by following the deformation. That is, the pair of hollow entrained three-dimensional parts can be sandwiched between both thighs of the user, stand up on the skin side, and can be in close contact with the skin. Thereby, it is possible to prevent a situation in which a gap is formed between each hollow entrainment three-dimensional part and the crotch part, and liquid excrement leaks from the gap. As a result, the liquid excrement can be appropriately guided to the absorbent body by the pair of hollow entrained three-dimensional parts while ensuring the touch, and the absorption performance can be improved. Further, when the surface sheet is made of easily loosen fibers, for example, water-retaining fibers (eg, cotton), both edge edges in the width direction W of the surface sheet are rubbed so that the water-retaining fibers are removed from both edge edges in the width direction W of the surface sheet. It may be loosened and fall off. However, since the both end edges of the pair of loop portions are located outside the both end edges of the topsheet 2, it is possible to further suppress rubbing of the both end edges. As a result, it is possible to suppress the reduction in touch.

In the absorbent article of the present invention, (7) in plan view, in the width direction, a dimension of a portion outside the joint portion in each of the pair of hollow entrainment three-dimensional portions is the same as that in the pair of end regions. The absorbent article according to (6) above, which is larger than the dimension of the portion outside the joint, may be used.
In the absorbent article, the length (dimension) in the width direction of the hollow rolled-in three-dimensional portion is longer than the length (dimension) in the width direction of the end region of the topsheet. Therefore, the pair of hollow entrained three-dimensional parts can be sandwiched between both thighs and more reliably stand up on the skin side and can be brought into close contact with the skin. As a result, it is possible to further prevent a situation in which a gap is formed between each hollow entrainment three-dimensional part and the crotch part, and liquid excrement leaks from the gap. As a result, the liquid excrement can be more appropriately guided to the absorbent body by the pair of hollow entrained three-dimensional parts while ensuring the touch, and the absorption performance can be improved.

In the absorbent article of the present invention, (8) a front end and a rear end in the longitudinal direction of each of the pair of hollow entrained three-dimensional parts are defined as inner end parts of corresponding side sheets of the pair of side sheets. The above-mentioned (6) or (7), which has an end fixing portion that is fixed to a front portion and a rear portion, and the end fixing portion is located outside the both end edges of the surface sheet in the width direction. It may be the absorbent article described in 1.
In this absorbent article, there are fixing parts for fixing the front and rear ends of the hollow entrainment three-dimensional part to the front and rear parts of the inner end of the side sheet, and the fixing parts are more than the edge of the topsheet. It is located outside. That is, the length of the pair of hollow entrained three-dimensional parts is increased without hindering both the end regions on both sides of the topsheet and the rise in the central portion in the longitudinal direction sandwiched between both thighs in the pair of hollow entrained three-dimensional parts. Both ends of the direction can be fixed. As a result, when each hollow entrainment three-dimensional part is sandwiched between the thighs, it bends downward, that is, liquid excrement reaching each hollow entrainment three-dimensional part leaks down along the thigh. It is possible to further suppress the situation.

The absorbent article of the present invention further comprises (9) a pair of compressed portions formed in a region where the surface sheet and the absorber overlap in the thickness direction, and the pair of compressed portions in the thickness direction. Each of the above is the absorbent article according to any one of (6) to (8) above, which reaches a position deeper to the non-skin surface side than the joint from the position of the topsheet. May be.
In the absorbent article, each of the pair of compressed portions is formed deeper on the non-skin surface side than the joint portion. Therefore, when the absorbent article is sandwiched in the width direction by the thighs of both legs of the user during use, and the absorbent body is deformed along the shape of the user's crotch part, the central portion in the width direction of the absorbent body ( The excretory opening contact area) can be convexly deformed toward the skin so as to contact the excretory opening. Thereby, the fit of the absorbent article can be improved, the fitting property can be improved, and the liquid excrement can be appropriately guided to the absorbent body, and the absorbent performance can be improved.

The absorbent article of the present invention further comprises (10) a pair of side sheets provided corresponding to each of the widthwise both ends of the auxiliary sheet, the pair of side sheets being located on the skin side of the both ends. The side seats are provided corresponding to the pair of side seats, respectively, and have a pair of three-dimensional gathers located at two end portions of the pair of side seats that face each other inward in the width direction. Each of the gathers has an outer end in the width direction as a fixed end and an inner end as a free end, and the surface sheet has one of the fixed ends of the pair of three-dimensional gathers in the width direction. The absorbent article according to any one of (1) to (5), wherein the absorbent article is located between the other fixed end of the pair of three-dimensional gathers and apart from both the fixed ends. May be an article
In the absorbent article, the topsheet is located between the pair of fixed ends of the pair of three-dimensional gathers. Therefore, when the body pressure is applied to the topsheet, the pair of three-dimensional gathers can prevent the liquid excrement from laterally leaking along the sidesheet from the topsheet. Further, even if liquid excrement is accumulated in the end regions on both sides of the topsheet and laterally leaks from it, a pair of three-dimensional gathers are located apart from the topsheet, and the auxiliary sheet exposed at the separated positions. Since the liquid excrement can be absorbed, side leakage of the liquid excrement can be further suppressed. As a result, the liquid excrement can be appropriately guided to the absorbent body while ensuring the touch, and the absorption performance can be improved.

In the absorbent article of the present invention, (11) a front end and a rear end in the longitudinal direction of each of the pair of three-dimensional gathers are arranged in front of an inner end of a corresponding side sheet of the pair of side sheets, and The absorbent article according to (10) above, which has an end portion fixing portion that is fixed to a rear portion, and the end portion fixing portion is located outside both end edges of the topsheet in the width direction. May be.
The absorbent article has end fixing parts for fixing the front and rear ends of the three-dimensional gather to the front and rear parts of the inner end of the side sheet, and the end fixing parts are the end of the topsheet. It is located outside the edge. That is, both ends in the longitudinal direction of the pair of three-dimensional gathers can be fixed without hindering both end regions on both sides of the topsheet and rising of the pair of three-dimensional gathers. As a result, it is possible to further suppress the situation in which the three-dimensional gathers fall toward the outside, that is, the liquid excrement reaching each of the three-dimensional gathers leaks sideways.

(12) The absorbent article according to the present invention may be the absorbent article according to any one of (1) to (11), in which the surface sheet contains a water-retaining fiber.
In the absorbent article, since the surface sheet contains the water-retaining fiber, the surface sheet can have a good feel to the touch.

In the absorbent article of the present invention, (13) the surface sheet has an excretory opening contact area in the central area, and the excretory opening contact area contains a weakly water-repellent oil agent. ).
In the absorbent article, the excretory opening contact area of the surface sheet containing the water-retaining fiber is weakly water-repellent. Therefore, in the surface sheet, it is possible to facilitate the transfer of the high-viscosity body fluid from the plurality of pores to the absorber while suppressing the diffusibility of the water-retaining fibers. Therefore, it is possible to improve the absorption performance in the excretory opening contact area while improving the touch of the entire topsheet.

According to the present invention, it is to provide an absorbent article capable of improving the absorption performance while improving the touch.

It is a top view showing an example of composition of an absorptive article concerning an embodiment. FIG. 2 is a sectional view taken along the line II-II in FIG. 1. 3 is an electron micrograph showing an example of pores of the topsheet according to the embodiment. It is a schematic diagram which shows the structural example of the pore of the surface sheet which concerns on embodiment. It is a schematic diagram which shows the structural example of the manufacturing apparatus of the absorbent article which concerns on embodiment. It is sectional drawing explaining the manufacturing method of the absorbent article which concerns on embodiment. It is a top view showing other examples of composition of an absorptive article concerning an embodiment. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7.

The absorbent article according to the embodiment will be described using a sanitary napkin as an example. However, the type and use of the absorbent article of the present invention are not limited to the examples, and may be applied to other absorbent articles without departing from the scope of the subject matter of the present invention. Other absorbent articles include, for example, panty liners, light incontinence pads, and disposable diapers.

(1st Embodiment)
1 and 2 are diagrams showing a configuration example of a sanitary napkin 1 according to an embodiment. FIG. 1 is a plan view showing a state in which the sanitary napkin 1 is developed, and FIG. 2 is a sectional view taken along line II-II in FIG. The sanitary napkin 1 of the present embodiment has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other. In the sanitary napkin 1 depicted in FIG. 1, the upper side and the lower side of the figure are the front side and the rear side of the longitudinal direction L, the left side and the right side are the left side and the right side of the width direction W, respectively, and the front side with respect to the paper surface. And the back side are the upper side and the lower side in the thickness direction T, respectively. The sanitary napkin 1 has a longitudinal centerline C _L (imaginary line) extending through the center of the widthwise direction W in the longitudinal direction L, and a widthwise centerline C _W (imaginary line) passing through the center of the longitudinal direction L and extending in the widthwise direction _W. Line) and. The direction and side toward the longitudinal centerline C _L are respectively inward and inward in the width direction W, and the away direction and side are respectively outward and outward in the width direction W. On the other hand, the direction and the side toward the center line C _W in the width direction are inward and inward in the longitudinal direction L, respectively, and the directions and sides are away from each other are outward and outward in the longitudinal direction L, respectively. Viewing the sanitary napkin 1 placed on a plane including the longitudinal direction L and the width direction W from the upper side in the thickness direction T is called "plan view", and the shape grasped in plan view is called "plan shape". An arbitrary direction within a plane including the longitudinal direction L and the width direction W is referred to as "planar direction". When the wearer placed on the top wears the sanitary napkin 1, the side closer to and far from the skin surface of the wearer in the thickness direction T is the "skin side" and the "non-skin side". Say. These definitions are commonly used for each material of the sanitary napkin 1.

In the present embodiment, the sanitary napkin 1 (excluding the wings) has a substantially rectangular shape in plan view that is long in the longitudinal direction L and short in the width direction W. However, the short sides at both ends in the longitudinal direction L have a substantially semicircular shape. The shape of the sanitary napkin 1 is not particularly limited as long as it is long in the longitudinal direction L and short in the width direction W. Examples of the shape include rounded rectangles, ellipses, ovals, and hourglass shapes. In the present embodiment, the sanitary napkin 1 includes a pair of

wing portions

9, 9 extending outward from both sides in the width direction W from a portion having a substantially rectangular shape. The wing portion 9 has a substantially trapezoidal shape. However, the shape may be, for example, a semi-circle or a semi-elliptical shape.

The sanitary napkin 1 includes a top sheet 2, an auxiliary sheet 5, an absorber 4, a back sheet 3, and a fixing portion 7. The topsheet 2 is a liquid-permeable sheet, and constitutes the surface of the sanitary napkin 1 on the skin side in this embodiment. The auxiliary sheet 5 is a liquid-permeable sheet, and is laminated on the non-skin side of the topsheet 2 in this embodiment. The absorber 4 is a liquid-absorbing / liquid-holding material, and is located between the topsheet 2 (and the auxiliary sheet 5) and the backsheet 3. The back sheet 3 is a liquid impermeable sheet, and constitutes the non-skin side surface of the sanitary napkin 1 in this embodiment. The fixing part 7 is a pressure-sensitive adhesive that adheres the sanitary napkin 1 to the skin side surface of the underwear, and is located on the non-skin side surface of the back sheet 3 in the present embodiment. Therefore, in the sanitary napkin 1, the top sheet 2, the auxiliary sheet 5, the absorber 4, the back sheet 3, and the fixing portion 7 are laminated in this order in the thickness direction T.

In the present embodiment, the sanitary napkin 1 further includes a pair of

side sheets

6 and 6 and a pair of fixing

portions

8 and 8. The pair of

side sheets

6, 6 are hydrophilic sheets, and are located on both sides of the auxiliary sheet 5 in the width direction W in the present embodiment. However, the pair of

side sheets

6, 6 may be water repellent sheets. The pair of fixing

portions

8 and 8 are adhesives that adhere the pair of

wing portions

9 and 9 to the non-skin side surface of the underwear, and in the present embodiment, the non-skin side of the back sheet 3 of the pair of

wing portions

9 and 9 is provided. Located on the surface. The sanitary napkin 1 may further include an exterior sheet on the non-skin side of the back sheet 3.

In the present embodiment, the topsheet 2 has a substantially rectangular shape that is long in the longitudinal direction L and short in the width direction W. However, the short sides at both ends in the longitudinal direction L have a substantially semicircular shape. The topsheet 2 includes a first fiber layer 2a containing water-retaining fibers and a second fiber layer 2b containing water-retaining fibers and hydrophobic fibers. The skin side surface of the first fiber layer 2 a constitutes the skin side surface of the topsheet 2. The non-skin side surface contacts the skin side surface of the second fiber layer 2b. The non-skin side surface of the second fiber layer 2b constitutes the non-skin side surface of the topsheet 2. Therefore, the topsheet 2 has a two-layer structure. However, the topsheet 2 may have a single-layer structure having one of the first fiber layer 2a and the second fiber layer 2b, or may have a multi-layer structure of three or more layers further including other fiber layers.

The auxiliary sheet 5 has a shape that is slightly larger in the width direction W than the topsheet 2. Therefore, the dimension of the auxiliary sheet 5 in the width direction W is larger than the dimension of the top sheet 2 in the width direction W (the dimension of the top sheet 2 in the width direction W is smaller than the dimension of the auxiliary sheet 5 in the width direction W). . That is, in plan view, both

edges

5E, 5E of the auxiliary sheet 5 in the width direction W are located outside the both

edges

2E, 2E of the top sheet 2 in the width direction W. In this case, when the sanitary napkin 1 is used, the pair of

wings

9 and 9 are folded toward the non-skin side of the underwear, so that the end edges 5E and 5E of the auxiliary sheet 5 become the end edges 2E and 2E of the topsheet 2. It is easier to contact both thighs of the user before.

In the present embodiment, the auxiliary sheet 5 has a substantially rectangular shape that is long in the longitudinal direction L and short in the width direction W. However, the short sides at both ends in the longitudinal direction L have a substantially semicircular shape. The auxiliary sheet 5 includes a pair of loop portions (hollow winding three-dimensional portions) 5L and 5L at both ends in the width direction W. The pair of

loop portions

5L and 5L are looped back at both sides in the width direction W of the auxiliary sheet 5 to the inside and the non-skin side (below the thickness direction T) of the auxiliary sheet 5 in the width direction W, respectively. It is formed by The end portions on both sides of the folded back auxiliary sheet 5 are joined to the pair of inner end portions of the pair of side sheets 6 facing each other so as to intermittently or continuously extend along the longitudinal direction L. They are bonded to each other with (example: hot melt adhesive). In this case, the outermost edge of the loop portion 5L in the width direction W is the edge 5E. The loop portion 5L does not include an elastic member. Therefore, it is possible to make it difficult for the auxiliary sheet 5, the topsheet 2, and the absorber 4 to shrink in the longitudinal direction L, and thus it is possible to make it difficult for pores and pores described later to be closed. In addition, the ends of both sides of the folded back auxiliary sheet 5 are further provided on the non-skin side surface of the auxiliary sheet 5 with a pair of joint portions (not shown) extending intermittently or continuously along the longitudinal direction L. , Exemplification: hot melt adhesive).

In this embodiment, the topsheet 2 and the auxiliary sheet 5 are bonded to each other with an adhesive (not shown, exemplification: hot melt adhesive). The adhesive is applied to the topsheet 2 or the auxiliary sheet 5 in a plurality of predetermined patterns extending in the longitudinal direction L and arranged in the width direction W (not shown). Examples of the predetermined pattern include a stripe shape, a repeating shape of omega, and a repeating shape of waves. Adhesive is applied to substantially line symmetric region with respect to the longitudinal center line C _L.

The topsheet 2 is divided into an area where the adhesive is applied in the above-described predetermined pattern and an area outside the area where the adhesive is not applied. In the present embodiment, both end edges in the width direction W in the area where the adhesive is applied and extending in the longitudinal direction L are referred to as a pair of joint end edges 17, 17. At that time, in the width direction W, the topsheet 2 has a pair of

joint edge portions

17, 17 and a region inside thereof, that is, a central region to which an adhesive is applied, and a pair of

joint edge portions

17, 17. It is divided into a region on the outside of 17, that is, a region of a pair of end portions to which no adhesive is applied. The former is a central area CA and the latter is a pair of end areas EA, EA. Therefore, the topsheet 2 has a central region CA located at the center in the width direction W and a pair of end regions EA, EA adjacent to both outsides of the central region CA in the width direction W. The central area CA is an area joined to the auxiliary sheet 5, and the pair of end areas EA, EA are areas not joined to the auxiliary sheet 5. Therefore, in each of the pair of end regions EA, EA, the inner edge in the width direction W is connected to the edge of the central region CA to form a fixed end, and the outer edge in the width direction W (longitudinal direction L). (Excluding both ends) is a free end that is not joined to any member. That is, the pair of end regions EA, EA are formed so that they can stand upright from the auxiliary sheet 5. The end area EA may be partially joined to the auxiliary sheet 5, the side sheet 6, or the absorber 4.

Central area CA and the pair of end regions EA, EA are both axisymmetric with respect to the longitudinal center line C _L. The range in the width direction W of the central area CA in the topsheet 2 is, for example, 70 to 96% of the dimension in the width direction W of the absorbent body 4 including the excretory opening contact area XA and the pair of compressed portions 12, 12 (described later). The range of is mentioned. If it is less than 70%, the end area EA of the topsheet 2 in the width direction W is rolled up and becomes thicker, and a gap is generated between the topsheet 2 and the wearer's body other than the thickened portion. , Liquid excretion easily leaks through the wearer's skin. When it exceeds 96%, the end portion in the width direction W of the topsheet 2 is adhered to the topsheet 2 by the joining of the topsheet 2 and the pair of end regions EA, EA becomes difficult to stand up. The range in the width direction W of each of the pair of end areas EA, EA in the topsheet 2 is the remaining area excluding the central area CA.

In the present embodiment, the absorber 4 has a substantially rectangular shape that is long in the longitudinal direction L in plan view. However, both ends of the absorber 4 in the longitudinal direction L have a substantially semicircular shape. The absorber 4 includes an absorbent core 4a and a core wrap 4b covering the absorbent core 4a.

In this embodiment, the portion of the auxiliary sheet 5 and the pair of

side sheets

6, 6 facing the non-skin side absorbent body 4 and the skin side surface of the absorbent body 4 have a predetermined pattern of adhesive (eg, hot melt). It is joined with an adhesive. The auxiliary sheet 5, the pair of

side sheets

6 and 6 and the portion of the absorbent body 4 facing the non-skin side back sheet 3 have a predetermined pattern of adhesive (eg, hot melt adhesive) or heat seal on the back sheet 3. Joined by.

In the sanitary napkin 1, the excretory opening contact area XA is set in the center in the width direction W slightly in the center in the longitudinal direction L and in the center in the width direction W in a plan view. The excretory opening contact area XA is an area that faces or contacts the excretory opening of the user when the sanitary napkin 1 is used. The excretory opening contact area XA is set according to the type and application of the absorbent article. The excretory opening contact area XA is, for example, about 1/4 to 1/2 of the total length of the absorbent body 4 in the center of the absorbent body 4 in the longitudinal direction L, and in the width direction W. The width of the absorber 4 is set to be approximately ⅓ to ½ of the total width of the absorber 4 in the approximate center thereof. Sanitary napkin 1 is longitudinally L, having a longitudinal front region A _F and a longitudinal central region A _C and the rear longitudinal area A _B, the. Longitudinal central region A _C includes excretory opening contact region XA. Longitudinal front region A _F is adjacent to the front in the longitudinal direction L of the longitudinal central region A _C, includes a forward end portion in the longitudinal direction L of the excretory opening contact region XA. Rear longitudinal area A _B is adjacent to the rear in the longitudinal direction L of the longitudinal central region A _C, including back end portion in the longitudinal direction L of the excretory opening contact region XA.

The central area CA of the topsheet 2 has a plurality of holes. In this embodiment, the sanitary napkin 1, in the central region CA, preferably in the longitudinal center region A _C, more preferably within the excretory opening contact region XA, squeezing of a plurality of point-like (circular) The unit 15 is provided. The dot-shaped compressed portion 15 is formed by pressing the surface sheet 2 and the absorber 4 in a dot shape in the thickness direction T. That is, the topsheet 2, the auxiliary sheet 5, and the absorber 4 (skin side core wrap 4b and absorbent core 4a) are squeezed in the thickness direction T. As a result, the surface sheet 2 is formed with a recess that is recessed in a dot shape toward the absorber 4. In the present embodiment, the recess corresponds to the hole of the topsheet 2. However, the pores are not limited to this example, and are intentionally generated in other configurations, for example, holes (through holes) penetrating the absorber 4 from the topsheet 2 by punching, or when the topsheet 2 is entangled. A hole (void hole) due to fiber unevenness is included. In addition, in this embodiment, the shape of the pressing unit 15 in a plan view is a circle, but other shapes such as a polygon, an ellipse, and a star may be used.

In the present embodiment, the sanitary napkin 1 further includes a pair of compressed parts (compressed grooves) 12, 12, a pair of compressed parts (compressed grooves) 13, 13, and compressed parts (compressed grooves) 11, 14. The pair of squeezing

portions

12 and 12 are continuously or intermittently positioned along the longitudinal direction L on both outer sides in the width direction W of the excretory opening contact area XA, and the pair of squeezing

portions

13 and 13 are a pair of squeezing portions. The

portions

12 and 12 are located rearward of the longitudinal direction L and continuously or intermittently along the longitudinal direction L. The squeezing parts 11 and 14 are located respectively in front of and behind the longitudinal direction L of the excretory opening contact area XA. In the compression units 11 to 14, the topsheet 2 (and the auxiliary sheet 5) and the absorber 4 (skin side core wrap 4b and absorbent core 4a) are compressed in the thickness direction T. The bottoms of the compressed portions 11 to 14 in the thickness direction T are located inside the absorbent core 4a, but may reach the core wrap 4b on the non-skin side. In the present embodiment, the squeezing portions 11 to 14 have a linear shape in a plan view, but may have another shape, such as a polygon, a circle, an ellipse, a star, or a combination thereof. Further, at least one of the pressing units 11 to 14 may be omitted.

The first fiber layer 2a contains a water-retaining fiber, which allows the topsheet 2 to have a good texture. The water-retaining fiber is not particularly limited as long as it has a property of absorbing and retaining water (water retaining property). Examples of the water retaining fiber include cellulosic fibers. The cellulose-based fiber is not particularly limited as long as it is a fiber containing cellulose, and examples thereof include natural cellulose fiber, regenerated cellulose fiber, purified cellulose fiber and semi-synthetic cellulose fiber. Examples of the natural cellulose fibers include plant fibers, such as seed hair fibers (example: cotton), skin fibers (example: hemp), vein fibers (example: Manila hemp), and fruit fibers (example: palm). Examples of cotton include hirsutum type cotton (exemplary: Upland cotton), barbadense type cotton, arboreum type cotton, and helbakium type cotton. The cotton may be organic cotton or pre-organic cotton (trademark). However, organic cotton means cotton that has been certified by GOTS (Global Organic Textile Standard). Examples of the regenerated cellulose fiber include fibers such as rayon, for example, viscose rayon obtained from viscose, polynosic, modal, and copper ammonia rayon (also referred to as “cupra”) obtained from a solution of cellulose in a copper ammonia salt. . As the purified cellulose fiber, lyocell, specifically, pulp is dissolved in an aqueous solution of N-methylmorpholine N-oxide to prepare a spinning dope (dope), which is extruded into a dilute solution of N-methylmorpholine N-oxide. Examples include fibers. Purified cellulose is commercially available, for example, as TENCEL (trademark). Semi-synthetic cellulose fibers include semi-synthetic cellulose, such as acetate fibers, such as triacetate and diacetate fibers. Above all, from the viewpoints of water retention and feel, natural cellulose fibers are preferred, cotton is more preferred, and Hirsumsum seed cotton is even more preferred. In the present embodiment, the water-retaining fiber is hirsutum type cotton (hereinafter, also simply referred to as “cotton”).

The second fiber layer 2b contains hydrophobic fibers and water retention fibers. The hydrophobic fiber is not particularly limited as long as it is a fiber having hydrophobicity. Examples of the hydrophobic fibers include thermoplastic resin fibers. The thermoplastic resin fiber is not particularly limited as long as it is a fiber containing a thermoplastic resin. Examples of the thermoplastic resin include olefin resins such as polyethylene (PE), polypropylene (PP) and ethylene-vinyl acetate copolymer (EVA), polyester resins such as polyethylene terephthalate (PET) and polylactic acid (PLA). Known resins such as resins and polyamide resins such as 6-nylon may be used, and these resins may be used alone or in combination of two or more kinds. Further, the structure of the fiber made of such a thermoplastic resin is not particularly limited, and for example, a composite fiber such as a core-sheath type fiber, a side-by-side type fiber, an island / sea type fiber; a hollow type fiber; Fibers having irregular cross-sections such as flat, Y-shaped, C-shaped, etc .; three-dimensional crimped fibers of latent crimps or actual crimps; split fibers that are split by a physical load such as water flow, heat, embossing, etc. The structured fibers may be used alone or in combination of two or more kinds. In this embodiment, the hydrophobic fiber is a PET / PE core-sheath type composite fiber. The water-retaining fiber is the same as the water-retaining fiber of the first fiber layer 2a. The second fibrous layer 2b contains a water-retaining fiber, so that the surface sheet 2 can have a good feel to the touch. The term "hydrophobic" refers to a property that is difficult to be compatible with water or difficult to retain water. For example, the contact angle with ion-exchanged water (eg, specific resistance value 10 MΩ · cm) is about 80 ° to 100 °. Say something.

In the present embodiment, the fibers forming the first fiber layer 2a are not particularly limited, and can have the following characteristics, for example, from the viewpoint of not adversely affecting the touch of the surface sheet 2. The proportion of the water-retaining fibers in the first fiber layer 2a is, for example, 70 to 100% by mass. The fiber length and average fiber length of the fibers are, for example, 10 to 80 mm and 15 to 60 mm. Examples of the fibers other than the water-retaining fibers of the first fiber layer 2a include thermoplastic resin fibers, and the fiber length and the average fiber length of the fibers are the same as those of the water-retaining fibers (within the range of 0.5 to 2 times). ) Is mentioned. The thickness of the first fiber layer 2a is not particularly limited and is, for example, 0.05 to 4 mm.

In the present embodiment, the fibers forming the second fiber layer 2b are not particularly limited, and for example, from the viewpoint of not adversely affecting the feel of the surface sheet 2 and the drawing of the liquid from the first fiber layer 2a, the following characteristics Can be The proportion of the water-retaining fibers in the second fiber layer 2b is, for example, 50 to 90% by mass, which is lower than the proportion of the water-retaining fibers in the first fiber layer 2a. The fiber length and average fiber length of the fibers are, for example, 3 to 40 mm and 5 to 30 mm shorter than the water-retaining fibers of the first fiber layer 2a. The fiber length and average fiber length of the hydrophobic fibers of the second fiber layer 2b are, for example, 10 to 80 mm and 15 to 60 mm. The thickness of the second fiber layer 2b is not particularly limited and is, for example, 0.05 to 4 mm.

In the present embodiment, in the first fiber layer 2a and the second fiber layer 2b, the ratio of the water-retaining fibers in the fibers forming the first fiber layer 2a is the water-retaining ratio of the fibers forming the second fiber layer 2b. It is preferable that the ratio is higher than the ratio of the natural fibers. That is, by doing so, the feel of the topsheet 2 can be improved. Further, in the first fiber layer 2a and the second fiber layer 2b, the average fiber length of the water-retaining fibers of the second fiber layer 2b is shorter than the average fiber length of the water-retaining fibers of the first fiber layer 2a, and The average fiber length of the hydrophobic fibers of the second fiber layer 2b is about the same, and the basis weights of both fiber layers are preferably about the same. As a result, the fibers forming the second fiber layer 2b are brought closer to each other, that is, the interfiber distance is shortened, and the capillary phenomenon is more strongly generated, so that the liquid excrement of the first fiber layer 2a is transferred to the second fiber layer. 2b can be pulled strongly. The fiber density of the second fiber layer 2b is preferably higher than the fiber density of the first fiber layer 2a. The fiber density is the density of the number of fibers. Thereby, a fiber density gradient is formed so that the fiber density increases from the first fiber layer 2a toward the second fiber layer 2b, and the liquid excretion of the first fiber layer 2a is strongly applied to the second fiber layer 2b. Can be retracted. Then, the liquid excrement can be stably transferred to the auxiliary sheet in contact with the non-skin side of the second fiber layer 2b.

In the present embodiment, the auxiliary sheet 5 is not particularly limited as long as it is liquid-permeable, but examples thereof include liquid-permeable nonwoven fabrics, for example, hydrophobic fiber nonwoven fabrics, and among them, thermoplastic resin fiber nonwoven fabrics are preferable. Used for. Also, if the topsheet 2 contains water-retaining fibers, preferably cellulosic fibers, more preferably cotton, the auxiliary sheet 5 will correspondingly contain water-retaining fibers, preferably cellulosic fibers, more preferably cotton. May be included. In the sanitary napkin 1 having such a configuration, the water-retaining fibers having high liquid diffusibility communicate with the auxiliary sheet 5 via the first fiber layer 2a of the topsheet 2 and the second fiber layer 2b. Therefore, by utilizing the liquid diffusion of the liquid excretion by these fibers, the liquid excrement can be more stably transferred from the surface sheet 2 to the absorbent body 4 through the auxiliary sheet 5, and the surface sheet 2 is soft to the touch. It is possible to improve the absorption performance while improving the above.

In the present embodiment, the absorbent core 4a of the absorbent body 4 is not particularly limited as long as it has liquid absorbency and liquid retention, but for example, a liquid retention substance containing water absorbent fibers such as pulp fibers, Water absorbing materials such as super absorbent polymers (SAP) may be mentioned. The core wrap 4b is not particularly limited as long as it can retain the shape of the absorbent core 4a, and examples thereof include a liquid-permeable sheet containing a hydrophilic non-woven fabric such as tissue.

The side sheet 6 is not particularly limited, but examples thereof include a water repellent non-woven fabric and a breathable synthetic resin film. The back sheet 3 is not particularly limited, but examples thereof include liquid impermeable nonwoven fabrics, synthetic resin films, and composite sheets of these. In the present embodiment, the wing portion 9 is formed by the side sheet 6 and the back sheet 3.

The sanitary napkin 1 described above does not open and close depending on the movement of the user's body, but has a plurality of holes (a plurality of squeezing parts 15 in this embodiment) that are open from the beginning. Here, the hole portion (compressed portion 15) is a recessed portion of the surface sheet 2 or a portion that penetrates to the opposite side, and includes a recessed portion and a through hole formed by compression. Such a hole (compressed portion 15) can suppress variation in the shape of the hole (compressed portion 15) regardless of the movement of the user's body. As a result, when the sanitary napkin is used, it is possible to reduce a stimulus such as friction on the user's skin around the hole (squeezed portion 15), thereby improving the feel of the user.
Further, the central area CA of the topsheet 2 is joined to the auxiliary sheet 5 and has a plurality of holes (squeezed portions 15). As a result, when the sanitary napkin is used, liquid excrement can be quickly transferred from the plurality of holes (squeezed portions 15) of the topsheet 2 to the absorbent body 4 via the auxiliary sheet 5. That is, the liquid excrement can be efficiently absorbed through the hole (pressing portion 15).
At that time, since the auxiliary sheet 5 has a larger shape in the width direction W than the top sheet 2, the both

edges

5E, 5E of the auxiliary sheet 5 are located outside the both

edges

2E, 2E of the top sheet 2. Will be located. Thereby, when the sanitary napkin is used, both

end edges

5E and 5E of the auxiliary sheet 5 are brought into contact with both thighs in advance in the width direction W, rather than both

end edges

2E and 2E of the top sheet 2, and the auxiliary sheet 5 While being compressed inward, it can be deformed so as to rise upward (in the direction of the excretion opening). As a result, the pair of end areas EA, EA, which are not joined to the auxiliary sheet 5 and are placed on the auxiliary sheet 5, are deformed so as to stand up further (in the direction of the excretion port), and the pair of end areas EA, EA are deformed. It can function like a wall. This can prevent the liquid excrement from diffusing outward in the width direction W and reaching the pair of end regions EA, EA. That is, the contact of the liquid excrement with the user's skin in a plan view can be reduced, and the burden on the user's skin can be reduced.
As described above, in the sanitary napkin 1, the absorption performance can be improved while improving the texture.

3 and 4 are diagrams showing a configuration example of pores of the surface sheet according to the embodiment. FIG. 3 is an electron micrograph showing an example of pores, and FIG. 4 is a schematic view showing an end portion in the width direction W in a configuration example of a surface sheet. As illustrated in FIG. 3, the central region CA and the pair of end regions EA, EA of the topsheet 2 have a plurality of pores 21. In the pores 21, for example, the dimension a (μm) in the width direction W is 100 μm to 5 mm, and the dimension b (μm) in the longitudinal direction L is 100 μm to 5 mm.

The topsheet 2 is formed by entangled fiber webs. In the present embodiment, the fibrous web for the first fibrous layer 2a of the topsheet 2 and the fibrous web of the second fibrous layer 2b are entangled by the water flow and are joined to each other. Examples of the method of entanglement by water flow include a spunlace method and a water jet method. By appropriately adjusting the water flow conditions at the time of entanglement, the shape of the irregularities on the drum (roll) or bed (belt) on which the entangled sheets are arranged, the conveying speed of the entangled sheets, the tension in the conveying direction MD, etc. The desired plurality of pores 21 can be formed in the surface sheet 2. However, the method of entanglement of the fibers forming the surface sheet 2 is not limited to this example, and another method of entanglement, for example, an air entanglement method such as an air-through method may be used.

In the present embodiment, the area per pore 21 present in the central region CA is larger than the area per pore 21 present in each of the pair of end regions EA, EA in plan view.
As shown in FIG. 4A, in a plan view, a plurality of thin edges are formed at the edge 2E in the width direction W (the edge 2E in the width direction W of the topsheet 2) in each of the pair of end regions EA, EA. Among the holes 21, there are partially missing pores 21a formed by cutting the topsheet 2. Then, the pores 21a form the recesses 22. The recess 22 is recessed inward in the width direction W, for example, at least by a length d0. Therefore, the concave-convex shape 23 is formed on the edge 2E by the plurality of recesses 22 formed by the plurality of pores 21a. At that time, the degree of unevenness of the uneven shape 23, that is, the degree of depression of the concave portion 22 is about the length d0.
Here, in the sanitary napkin 1 of the present embodiment, as described above, in plan view, the areas of the individual pores 21 existing in the pair of end regions EA, EA are relatively small. Therefore, it is possible to relatively reduce the size (length d0) of the plurality of recesses 22 due to the plurality of pores 21a existing on the edge 2E, and therefore the degree of the unevenness of the uneven shape 23 is relatively increased. Can be made smaller. As a result, the frictional stimulus to the user's skin due to the uneven shape 23 of the edge 2E of the topsheet 2 can be reduced, and the touch to the skin can be improved. At the same time, in plan view, the area of each of the pores 21 existing in the central region CA of the topsheet 2 is made relatively large. Therefore, liquid excrement can be rapidly transferred from the plurality of pores 21 of the topsheet 2 to the absorber 4 via the auxiliary sheet 5, and the absorption performance can be improved. As described above, in the sanitary napkin 1, the absorption performance can be improved while improving the texture.

In the present embodiment, the area of the pores 21 in the central region CA and the pair of end regions EA, EA in the topsheet 2 is 0.01 mm ² or more and 25 mm ² or less in plan view.
In the sanitary napkin 1, since the area of the pores 21 in the central region CA and the pair of end regions EA, EA is 0.01 mm ² or more, the effect of passing liquid excrement can be increased, and the absorption performance can be increased. Can be increased. Further, since the area of the pores 21 is 25 mm ² or less, it is possible to prevent the degree of the unevenness of the uneven shape 23 formed by the presence or absence of the pores 21 from being too large, and reduce the frictional stimulus to the user's skin. Therefore, the touch can be improved. The area of the pores 21 is more preferably 1 mm ² or less. If the pores 21 are large, the user may mistakenly recognize the sanitary napkin 1 as a perforated product, that is, a defective product, but by making the pores 21 smaller, the possibility can be eliminated. . Therefore, it is possible to remove the anxiety of the appearance of the user while ensuring the function of the pores 21.

In the present embodiment, the shape of the pores 21 existing in the pair of end regions EA, EA in the plan view is such that the dimension dW in the width direction W is shorter than the dimension dL in the longitudinal direction L.
As shown in FIG. 4B, in the sanitary napkin which is not the present embodiment, the edge 2Ex in the width direction W (the edge in the width direction W of the topsheet 2x in the end area EA of the topsheet 2x in a plan view. At the edge 2Ex), among the plurality of pores 21x, there are partially missing pores 21ax formed by cutting the surface sheet 2x. Then, the recess 22x is formed by the pore 21ax. The recess 22x is recessed inward in the width direction W, for example, at least by a length d0x. Therefore, the concave-convex shape 23x is formed on the edge 2Ex by the plurality of recesses 22x formed by the plurality of pores 21ax. At this time, the degree of unevenness of the uneven shape 23x, that is, the degree of depression of the recess 22x is about the length d0x (> d0). However, the shape of the pores 21x is such that the dimension dWx in the width direction W is longer than the dimension dLx in the longitudinal direction L. Therefore, in plan view, the number of the pores 21ax partially present at the edge 2Ex in the width direction W of the topsheet 2x is increased, and the pores 21ax partially lacked at the edge 2Ex. The degree of unevenness formed in the width direction W increases.
On the other hand, in the sanitary napkin 1 of the present embodiment, the shape of the pores 21 existing in the end area EA of the topsheet 2 has a shape that is relatively long in the longitudinal direction L in a plan view. Therefore, in plan view, it is possible to reduce the number of the partially missing pores 21a existing on the edge 2E of the topsheet 2 in the width direction W (of the edge area EA), and the edge thereof. In 2E, it is possible to reduce the degree of unevenness in the width direction W formed by the pores 21a, which are partially cut off. Thereby, when the pair of end regions EA, EA of the topsheet 2 stand up on the skin side, the frictional stimulus of the topsheet 2 against the user's skin can be reduced, and thus the touch can be improved.

However, the area and shape of the pores 21 are measured by the following method. (1) The topsheet 2 is cut into a size of 40 mm × 40 mm to obtain a sample. (2) Using a scanning electron microscope FlexSEM1000 manufactured by Hitachi High-Technologies Corporation, photographing magnification: 37 times, measurement area: length 22.25 mm × width 36.25 mm, surface of the topsheet 2 (first fiber layer) Take an image from 2a). At that time, images are taken five times in total at a depth of 0 μm from the surface. (3) From each of the obtained images, a site where fibers do not exist is determined, and the area and dL and dW are obtained. Then, the average of five times is defined as the area of the pores 21 and dL and dW.

In the present embodiment, the topsheet 2 is formed of a nonwoven fabric, and in the fibers forming the nonwoven fabric, the fibers in the end area EA are oriented in the longitudinal direction L more than the fibers in the central area CA. That is, in the width direction W, in the topsheet 2, the fibers in the central region CA have a relatively small orientation in the longitudinal direction L, and the fibers in the end regions EA, EA have a relatively large orientation in the longitudinal direction L.
In the sanitary napkin 1 having such a configuration, since the fiber orientation of the central area CA of the surface sheet 2 formed of the non-woven fabric is relatively random, the liquid excrement excreted in the central area CA is approximately concentric. It can be spread evenly. At the same time, since the fiber orientations of the end regions EA, EA on both sides are relatively oriented in the longitudinal direction L, the liquid excrement reaching the end regions EA, EA on both sides is generally diffused in the longitudinal direction L. Can be made. That is, the sanitary napkin 1 can be used as a whole, and the absorption performance can be improved. Further, in the end regions EA, EA on both sides of the topsheet 2, the number of fibers exposed from the end edges 2E, 2E on both sides to the outside in the width direction W decreases due to the fiber orientation in the longitudinal direction L. Friction is reduced, and a reduction in touch can be suppressed.

In the present embodiment, as described above, a pair of

side sheets

6, 6 is provided corresponding to each of both ends of the auxiliary sheet 5 in the width direction W and located on the non-skin side of the both ends. . The auxiliary sheet 5 is provided so as to correspond to both ends of the auxiliary sheet 5 in the width direction W, and the both ends are wound around the non-skin surface side of the auxiliary sheet 5 (a pair of loop portions (hollow). It has 3L of entrained parts) and 5L. The end portion of the auxiliary sheet 5 in the width direction W of each of the pair of

loop portions

5L, 5L is joined to the inner end portion of the pair of

side sheets

6, 6 corresponding to the end portion in the width direction W. It is joined at the portion 18.
The sanitary napkin 1 having such a configuration has a pair of

loop portions

5L and 5L (hollow winding three-dimensional portion). Therefore, when the sanitary napkin 1 is sandwiched in the width direction W by the thighs of both legs of the user during use, and the absorber 4 is deformed along the shape of the crotch of the user, the pair of

loop portions

5L, 5L can be easily deformed following the deformation of the absorber 4. That is, the pair of

loop portions

5L and 5L can be sandwiched between both thighs of the user, stand up on the skin side, and can come into close contact with the skin. This can prevent a situation in which a gap is formed between each loop portion 5L and the crotch portion, and liquid excrement leaks from the gap. As a result, the liquid excrement can be appropriately guided to the absorbent body 4 by the pair of

loop portions

5L, 5L in addition to the pair of end regions EA, EA while ensuring the touch, and the absorption performance is further improved. Can be made. Further, when the surface sheet 2 is made of easily loosen fibers, for example, water-retaining fibers (eg, cotton), both

edge edges

2E and 2E in the width direction W of the surface sheet 2 are rubbed so that the water-retaining fibers have a width of the surface sheet 2. There is a risk that it will fall off from both

edges

2E, 2E in the direction W and fall off. However, since both end edges 5E, 5E of the pair of

loop portions

5L, 5L are located outside the both end edges 2E, 2E of the topsheet 2, it is possible to further suppress rubbing of the both end edges 2E, 2E. As a result, it is possible to suppress the reduction in touch. In addition, the force received from the thigh can be softly received by the cushioning action of the pair of

loop portions

5L and 5L, and the feel of the user can be improved.

In the present embodiment, the dimension of the portion outside the joint portion 18 in each of the pair of loop portions (hollow winding three-dimensional portion) 5L and 5L in the width direction W in plan view is such that the pair of end region EA, It is larger than the dimension of the portion outside the joint 18 in each EA.
In the sanitary napkin 1 having such a configuration, the length (dimension) in the width direction W in the loop portion (hollow winding solid portion) 5L is longer than the length (dimension) in the width direction W in the end region EA. ing. Therefore, the pair of

loop portions

5L and 5L can be sandwiched between both thighs and more reliably rise to the skin side and can be brought into close contact with the skin. As a result, it is possible to further suppress the situation in which a gap is formed between each loop portion 5L and the crotch portion, and liquid excrement leaks from the gap. As a result, it is possible to more appropriately guide the liquid excrement to the absorbent body by the pair of

loop portions

5L and 5L while ensuring the feel of the skin, and it is possible to improve the absorption performance.

In the present embodiment, the sanitary napkin 1 corresponds to the front and rear ends in the longitudinal direction L in each of the pair of loop portions (hollow winding three-dimensional portions) 5L and 5L among the pair of

side sheets

6 and 6. The side seat 6 has end fixing portions 19 that are fixed to the front and rear portions of the inner end of the side seat 6. In the width direction W, the end fixing portion 19 is located outside the both end edges 2E of the topsheet 2. The end portion fixing portion 19 can be formed by, for example, joining with an adhesive such as a hot melt adhesive or joining with heat sealing. Further, each of the pair of loop portions (hollow winding three-dimensional portion) 5L, 5L may be joined to the absorber 4.
In the sanitary napkin 1 having such a configuration, the end portion fixing portion 19 that fixes the front and rear end portions of the loop portion (hollow winding three-dimensional portion) 5L to the front and rear portions of the inner end portion of the side seat 6 is provided. It is located outside the both

edges

2E and 2E of the surface sheet 2. Therefore, without disturbing any of the pair of end regions EA, EA on both sides of the topsheet 2 and the rising at the central portion in the longitudinal direction L sandwiched by both thighs in the pair of

loop portions

5L, 5L, Both ends of the pair of

loop portions

5L and 5L in the longitudinal direction L can be fixed. As a result, when each loop portion 5L is sandwiched between the thighs, it bends downward, that is, liquid excrement reaching each loop portion 5L leaks downward along the thighs. The situation can be suppressed more.

In the present embodiment, a pair of squeezing

portions

12, 12 formed in a region where the topsheet 2 and the absorber 4 overlap in the thickness direction T is further provided. In the thickness direction T, the pair of

compressed portions

12 and 12 reach a position deeper to the non-skin surface side than the pair of joined

portions

18 and 18 from the position of the topsheet 2.
In the sanitary napkin 1 having such a configuration, the pair of

compressed portions

12, 12 are formed deeper on the non-skin surface side than the pair of

joint portions

18, 18. Therefore, when the sanitary napkin 1 is sandwiched in the width direction W by the thighs of both legs of the user during use, and the absorber 4 is deformed along the shape of the crotch of the user, the width direction of the absorber 4 is reduced. The central portion of W (excretion opening contact area XA) can be deformed convexly to the skin side so as to contact the excretion opening. As a result, the fit of the sanitary napkin 1 is ensured, the fit property is improved, and liquid excrement can be appropriately guided to the absorbent body 4, and the absorption performance can be improved.

In the present embodiment, the topsheet 2 may include a weakly water-repellent oil agent in the excretory opening contact area XA in the central area CA. Here, examples of the weakly water-repellent oil agent include blood modifying agents described in JP-A-2013-081772.
In the sanitary napkin 1 having such a configuration, particularly when the topsheet 2 contains water-retaining fibers, the excretory opening contact area XA is weakly water-repellent, so that the water-retaining fibers diffuse in the topsheet 2. It is possible to facilitate transfer of the highly viscous liquid excrement from the plurality of pores 21 to the absorbent body 4 while suppressing the property. Therefore, it is possible to improve the absorption performance in the excretory opening contact area XA while improving the feel of the surface sheet 2 as a whole.

In this embodiment, the topsheet 2 may have an uneven structure. For example, at least the first fiber layer 2a extends continuously along the longitudinal direction L, a plurality of convex portions located at intervals in the width direction W, and extends continuously along the longitudinal direction L, and is adjacent to each other. A plurality of concave portions located between the corresponding convex portions may be included. In that case, each of the plurality of convex portions may be formed solid. When each of the plurality of convex portions is thus formed solid, each convex portion is less likely to be crushed, and the liquid is easily transferred from the convex portion that is easy to contact the user's body to the absorber 4, The dryness of the surface of the protrusion can be improved.

The percentage of fiber types in a sheet such as a fiber layer is measured as follows.
That is, the water-retaining fiber and the hydrophobic fiber are colored in different colors to measure the type ratio of the fiber. (1) The topsheet 2 is cut into a size of 70 mm × 70 mm to obtain a sample. (2) By carrying out a coloring treatment with the reagent Kayastein Q (color dyeing company), only the water-retaining fiber is dyed blue and only the hydrophobic fiber is colored yellow. (3) By measuring the ratio of blue and yellow when viewed from the skin side surface (first fiber layer 2a) with a digital microscope VHX-100 manufactured by KEYENCE CORPORATION in a range of 50 mm × 50 mm, It is the ratio of the types of fibers in the first fiber layer 2a. On the other hand, by measuring the ratio of blue and yellow when viewed from the non-skin surface (second fiber layer 2b) within a range of 50 mm × 50 mm, the ratio of the types of fibers in the second fiber layer 2b is obtained.

Also, the distance between fibers in a sheet such as a fiber layer is measured according to the following measuring method. (1) The topsheet 2 is cut into a size of 10 mm × 10 mm to obtain a sample. (2) Using a digital microscope VHX-100 (lens VH-Z20R + variable illumination attachment VH-K20) manufactured by Keyence Corporation, photographing magnification: 200 times, measurement area: vertical 1300 μm × horizontal 1735 μm, surface sheet Images are taken from the front surface (first fiber layer 2a) and the back surface (second fiber layer 2b) of No. 2 respectively. At that time, images are taken five times in total at a depth of 0 to 100 μm and a depth of 20 μm for each of the front and back surfaces. (3) From each of the obtained images, the area of the part where the fiber does not exist is obtained. At that time, the presence / absence of fibers in each pixel in the obtained image is determined based on whether the luminance in each pixel is lower or higher than a predetermined luminance (threshold value), and the presence / absence of fibers in the photographing region in each image is determined. To judge. However, light is transmitted only to a portion where fibers are not present, so that it is bright, that is, the brightness is high. As a result, the area of the fiber-free region in the imaging region is obtained. (4) The porosity is calculated by dividing the obtained area of the region where the fiber does not exist by the area of the imaging region (measured area). The calculation is performed on images at depths of 20 μm to calculate five porosities. (5) The porosity of each of the front surface (first fiber layer 2a) and the back surface (second fiber layer 2b) of the topsheet 2 is determined by calculating the average of the five porosities. The size of the interfiber distance can be determined by comparing the sizes of the voids. That is, when the porosity is large, it can be considered that the distance between the fibers is large. For example, the porosity is 25.4% on the front surface of the topsheet 2, that is, the skin surface side (the first fiber layer 2a: surface of 100% Cotton, for example), and the back surface, that is, the non-skin surface side (second fiber layer 2b: The porosity was 24.5% in the case of Cotton 60% + synthetic fiber 40%).

Further, the fiber length and the average fiber length of the fibers of the sheet such as the fiber layer are determined by the “A7.1.1 A method (standard method)” of “A7.1 Measurement of fiber length” in Annex A of JIS L 1015: 2010. ) A method for measuring the length of individual fibers on a graduated glass plate ”. The above method is a test method equivalent to ISO 6989 issued in 1981.

Also, the basis weight of a sheet such as a fiber layer is measured according to the following measuring method. A fiber layer for one layer is prepared, the fiber layer is cut into a size of 5 cm × 5 cm to obtain a sample, and the mass is measured after the drying treatment in an atmosphere of 100 ° C. or higher. Then, the measured mass is divided by the area of the sample to calculate the basis weight of the sample. The value obtained by averaging the basis weights of 10 samples is the basis weight of the sheet.

Also, the thickness of a sheet such as a fiber layer is measured according to the following measuring method. Using a digital microscope VHX-100 manufactured by Keyence Corporation, an enlarged image is taken from a direction perpendicular to the cut surface of the topsheet 2. The magnified image is an image magnified so that the entire surface sheet 2 in the thickness direction T can be photographed, and the magnification is, for example, 20 to 50 times. The thickness of each fiber layer is measured in the 2D image converted from the obtained 3D image. The average value of the thicknesses measured at three separate cut surfaces is the thickness of the topsheet 2.

The fiber density of a sheet such as a fiber layer is measured, for example, by the following measuring method.
(1) The topsheet 2 is cut into a size of 10 mm × 10 mm to obtain a sample. (2) A cut surface parallel to the thickness direction T of the sample is magnified and observed using a scanning electron microscope (JCM-5100 manufactured by JEOL Ltd.). The magnification is such that the cross section of 30 to 60 fibers can be measured in one screen (eg, 150 to 500 times). (3) The observation region is divided into three layers in the thickness direction T into a skin side layer, an intermediate layer, and a non-skin side layer, and the skin side layer is the first fiber layer 2a, and the non-skin side The second layer is the second fiber layer 2b, and the number of cross sections of the fibers in each fiber layer is measured. That is, the number of cross-sections of the cut fiber is counted in the cut surface having a predetermined area. (4) The number of cross sections of the obtained fiber is converted into the number of cross sections of the fiber per 1 mm ² , and this is defined as the fiber density (pieces / mm ² ). The measurement is performed at three locations, and the average value of the measured values is used as the fiber density of the sample. That is, the density of the number of fibers is used as the fiber density. In other words, the number of fibers per unit area in the cross section parallel to the thickness direction T is used as the fiber density. The number of fibers per unit volume may be used as the fiber density. The number of fibers per unit volume can be obtained by analysis by X-ray CT, for example. Although the numerical value is different between the fiber density per unit area and the fiber density per unit volume, they are the same in the relative comparison (exemplification: size comparison) of the fiber density between the fiber layers.

Next, an example of a method for manufacturing the sanitary napkin 1 according to the present embodiment will be described.

FIG. 5 is a schematic diagram showing a configuration example of the sanitary napkin 1 manufacturing apparatus 300, and FIG. 6 is a diagram schematically illustrating a method for manufacturing the sanitary napkin 1. The manufacturing apparatus 300 has a transport direction MD, a transverse direction CD, and a vertical direction TD for transporting materials such as sheets and semi-finished products. In this embodiment, the longitudinal direction, the width direction, and the thickness direction of the material or semi-finished product are the same as the transport direction MD, the transverse direction CD, and the vertical direction TD.

First, the first card machine 110 forms the second fibrous web P11 corresponding to the second fibrous layer 2b. The first card machine 110 is a dry roller card using a single card or a double card generally used for forming a fibrous web. The second fibrous web P11 includes water retaining fibers and hydrophobic fibers. The second fiber web P11 is transported in the transport direction MD by a transport device (not shown). Then, the second card machine 120 forms the first fibrous web P12 corresponding to the first fibrous layer 2a. The second card machine 120 is also a dry type roller card similar to the first card machine 110. The 1st fiber web P12 contains a water retention fiber. The first fibrous web P12 is laminated on the second fibrous web P11 being conveyed by the conveying device. Thereby, the composite fiber web P13 having a two-layer structure in which the first fiber web P12 and the second fiber web P11 are laminated is formed. The ratio of each fiber in each fiber web can be controlled by the ratio of the raw material fibers supplied to each card machine.

Next, the composite fiber web P13 having a two-layer structure is subjected to water jet processing by the water jet processing machine 130, and the fibers are entangled with each other. Thereby, the first continuous sheet (spunlace nonwoven fabric) P14 is formed. Here, the water jet treatment is a treatment in which the composite fiber web P13 is placed on a mesh belt that continuously moves, and a high-pressure jet water stream is jetted from the upper surface side of the composite fiber web P13 to entangle the fibers. The properties of the first continuous sheet P14 obtained by the water jet treatment are appropriately adjusted depending on the mass of each fiber web, the hole diameter of the injection nozzle, the number of holes (pitch) of the injection nozzle, the passage speed of the fiber web, the uneven shape of the mesh belt, and the like. , Can be changed. Then, the first continuous sheet P14 that has passed through the water jet processor 130 is dried by the dryer 140. The dried first continuous sheet P15 is transported in the transport direction MD by the transport device.

Note that the method for forming the fibrous web corresponding to each fibrous layer is not limited to the above method, and for example, a wet method or the like can be adopted. The web entanglement method is not limited to the above-mentioned method, and for example, a water entanglement method, an air through method, a needle punch method, or the like can be adopted. Moreover, the first continuous sheet P15 may be manufactured in a manufacturing factory different from the manufacturing factory of the sanitary napkin 1 and supplied to the manufacturing factory of the sanitary napkin 1 in a roll state.

Next, the first continuous sheet P16, which is the first continuous sheet P15 transported by the transport device (not shown) or unwound from the roll (not shown), is supplied to the shaping device 210. Here, the shaping apparatus 210 includes shaping rolls 210a and 210b that are provided on the outer peripheral surface in the circumferential direction and have concave and convex portions that mesh with each other. Then, the first continuous sheet P16 is sandwiched between the concave-convex portions of the shaping rolls 210a and 210b, and the concave-convex structure extending in the transport direction MD is shaped. It may be heated during shaping. Thereby, the continuous topsheet P16 for the topsheet 2 is formed.

Next, the continuous auxiliary sheet AS for the auxiliary sheet 5 unwound from the material roll WR3 is supplied to the heating device 220. Next, the continuous auxiliary sheet AS is subjected to heat treatment to recover the bulk, and then supplied to the coating device 302. Then, the continuous auxiliary sheet AS is coated on one side with an adhesive (example: hot melt adhesive) in a predetermined pattern (example: spiral pattern). After that, the continuous auxiliary sheet AS and the continuous surface sheet P16 are supplied to the joining device 230, sandwiched between the pair of joining

rolls

230a and 230b of the joining device 230, and joined. Thereby, as shown in FIG. 5A, the continuous surface sheet P17 is formed.

Next, the continuous surface sheet P17 is supplied to the coating device 303. Then, the continuous surface sheet P17 has an adhesive (eg, hot melt adhesive) along the transport direction MD on the lower surface of the continuous surface sheet P17 (the continuous auxiliary sheet AS) in the up-down direction TD and the end portion in the transverse direction CD. Agent) is applied in a predetermined pattern. Next, the continuous topsheet P17 is supplied to the loop forming device 240. Then, both end portions in the transverse direction CD of the continuous surface sheet P17 of the continuous auxiliary sheet AS are folded back in a loop shape toward the central portion by a folding jig such as a sailor of the loop forming device 240. As a result, a pair of side portions ASL, ASL corresponding to the pair of

loop portions

5L, 5L are formed on both sides of the continuous surface sheet P17 in the transverse direction CD. Thereby, as shown in FIG. 5B, the continuous topsheet P18 is formed.

Next, the continuous side sheet SS for the side sheet 6 unwound from the material roll WR4 is supplied to the cutting device 250. Then, the continuous side sheets SS are bisected in the transverse direction CD along the transport direction MD at the center position of the transverse direction CD to form a pair of continuous side sheets SSa, SSb adjacent to each other in the transverse direction CD. To be done. Then, the pair of continuous side sheets SSa and SSb are supplied to the pair of coating devices 303a and 303b. Then, each of the pair of continuous side sheets SSa and SSb is coated with an adhesive (example: hot-melt adhesive) in a predetermined pattern (example: stripe pattern) on the inner end in the transverse direction CD. Next, the pair of continuous side sheets SSa and SSb and the continuous surface sheet P18 are supplied to the joining device 260, sandwiched between the pair of joining

rolls

260a and 260b of the joining device 260, and joined. As a result, the pair of side portions ASL, ASL of the continuous topsheet P18 and the pair of continuous side sheets SSa, SSb are respectively joined. Thereby, as shown in FIG. 5C, the continuous topsheet P2 is formed.

Next, the continuous surface sheet P2 is supplied to the coating device 305, and an adhesive (eg, hot-melt adhesive) is applied in a predetermined pattern on the surface close to the pair of continuous side sheets SSa and SSb. Next, the continuous surface sheet P2 and the absorber P3 lined up in the transport direction MD at predetermined intervals are supplied to the joining device 270. Then, the continuous surface sheet P2 and the absorber P3 are sandwiched between the pair of joining

rolls

270a and 270b of the joining device 270 and joined. Thereby, the semi-finished product P4 is formed. Subsequently, the semi-finished product P4 is supplied to the pressing device 280. In the squeezing device 280, an embossing roll 280a having a squeezing convex portion on the outer peripheral surface thereof and an anvil roll 280b are arranged facing each other. Then, the semi-finished product P4 is sandwiched between the embossing roll 280a and the anvil roll 280b and compressed. As a result, the compressed parts 11 to 15 extending from the continuous surface sheet P2 to the absorbent body P3 in the vertical direction TD are formed, thereby forming the semi-finished product P5. It should be noted that each compression unit may be compressed by different compression devices. Next, the continuous backsheet BS for the backsheet 3 is supplied to the joining device 290 from the material roll WR4. An adhesive (example: hot melt adhesive) is applied to one surface of the continuous back surface sheet BS by the application device 306. On the other hand, the semi-finished product P5 is supplied to the joining device 290. Then, the continuous back surface sheet BS and the semi-finished product P5 are sandwiched and joined between the pair of joining

rolls

290a and 290b of the joining device 290. As a result, as shown in FIG. 5D, a semifinished product P6 in which the continuous backsheet BS and the semifinished product P5 are stacked in the up-down direction TD is formed. After that, the release sheet CT (fixing portions 7, 8) with an adhesive is joined to the semi-finished product P6, and the peripheral portion of the semi-finished product P6 joined with the release sheet CT is cut into the shape of the sanitary napkin 1 for sanitary use. A napkin 1 is formed.

The sanitary napkin 1 is manufactured as described above.

(2nd Embodiment)
Hereinafter, differences between the sanitary napkin 1 of the second embodiment and the sanitary napkin 1 of the first embodiment will be mainly described. 7 to 8 are diagrams showing a configuration example of the sanitary napkin 1 according to the embodiment. FIG. 7 is a plan view showing the unfolded state of the sanitary napkin 1, and FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. The sanitary napkin 1 of the present embodiment is provided with a pair of three-dimensional gathers 16, 16 at the inner ends of the pair of

side sheets

6, 6 in the width direction W, and both ends of the auxiliary sheet 5 in the width direction W. This is different from the sanitary napkin 1 of the first embodiment in that there is no pair of loop portions 5L. Hereinafter, a specific description will be given.

The pair of

side sheets

6, 6 are provided corresponding to each end of the auxiliary sheet 5 in the width direction W, are located on the skin side of the both ends, and are provided with the pair of three-dimensional gathers 16, 16. There is. The pair of three-dimensional gathers 16 and 16 are provided corresponding to the pair of

side sheets

6 and 6, respectively, and are located at two end portions of the pair of

side sheets

6 and 6 that face inward in the width direction W. In other words, the pair of three-dimensional gathers 16, 16 are arranged on both sides in the width direction W of the auxiliary sheet 5 along the longitudinal direction L. In each of the pair of three-dimensional gathers 16, 16, the outer end in the width direction W is the fixed end 16E1 (the inner end in the width direction W of the joint portion with the auxiliary sheet 5), and the inner end is the free end 16E2 ( The end is not joined to the members such as the surface sheet 2 and the auxiliary sheet 5. The three-dimensional gather 16 has an elastic member 16a extending along the longitudinal direction L at the free end 16E2. However, the three-dimensional gather 16 may not have the elastic member.

The length between the fixed end 16E1 and the free end 16E2 in the width direction W of the three-dimensional gather 16 is the length between the edge 2E in the width direction W of the topsheet 2 and the joint edge 17, that is, the end portion. It is longer than the length of the area EA in the width direction W. Thereby, the height when the three-dimensional gather 16 rises can be made higher than the height when the end area EA rises. Therefore, even if the liquid excrement laterally leaks from the end area EA, the liquid excrement laterally leaks from the three-dimensional gather 16 can be more reliably suppressed. As a result, the liquid excrement can be appropriately guided to the absorber 4 while ensuring the touch, and the absorption performance can be improved.

The topsheet 2 is located in the width direction W between the fixed ends 16E1 and 16E1 of one of the pair of three-dimensional gathers 16, 16 and is spaced apart from the fixed ends 16E1 and 16E1. There is. That is, in the width direction W, both

end edges

2E and 2E of the topsheet 2 in the width direction W are separated from one fixed end 16E1 and the other fixed end 16E1 of the pair of three-dimensional gathers 16, 16.

In the sanitary napkin 1, the topsheet 2 is located between the pair of fixed ends 16E1 and 16E1 of the pair of three-dimensional gathers 16 and 16. Therefore, when body pressure is applied to the topsheet 2, the pair of three-dimensional gathers 16 and 16 can prevent the liquid excrement from laterally leaking along the sidesheet from the topsheet 2. Moreover, even if liquid excrement is accumulated in the end areas EA, EA on both sides of the topsheet 2 and leaks in the width direction W, the pair of three-dimensional gathers 16, 16 are located at a position separated from the topsheet 2. Since the liquid excrement can be absorbed by the auxiliary sheet 5 exposed at the separated positions, lateral leakage of the liquid excrement can be further suppressed. As a result, the liquid excrement can be appropriately guided to the absorber 4 while ensuring the touch, and the absorption performance can be improved.

The sanitary napkin 1 has front and rear ends in the longitudinal direction L of each of the pair of three-dimensional gathers 16, 16 in front of the inner end of the corresponding side seat 6 of the pair of

side seats

6, 6. It has the end part fixing | fixed

part

19 and 19 fixed to a rear part. In the width direction W, the

end fixing portions

19 and 19 are located outside the both end edges 2E of the topsheet 2.
The sanitary napkin 1 has end fixing parts 19 for fixing the front and rear ends of the three-dimensional gathers 16 to the front and rear parts of the inner end of the side seat 6, and the end fixing parts thereof. 19 is located outside the edge 2E of the topsheet 2. That is, both ends of the pair of three-dimensional gathers 16 and 16 in the longitudinal direction L are prevented without hindering both end regions EA and EA on both sides of the topsheet 2 and rising of the pair of three-dimensional gathers 16 and 16. Can be fixed. As a result, it is possible to further suppress the situation in which the three-dimensional gathers 16 fall toward the outside, that is, the liquid excrement reaching each of the three-dimensional gathers 16 leaks sideways.

The absorbent article of the present invention is not limited to the above-described embodiments, and can be appropriately combined and changed without departing from the object and the purpose of the present invention.

1 Sanitary napkins (absorbent articles)
2 Top sheet 3 Back sheet 4 Absorber 5 Auxiliary sheet 7 Fixed part 15 Compressed part (hole)
CA central area EA end area

Claims

A longitudinal direction, having a width direction and a thickness direction, an absorbent article in which a topsheet, an auxiliary sheet, an absorber, a backsheet and a fixing portion are laminated in this order in the thickness direction,
The widthwise dimension of the topsheet is smaller than the widthwise dimension of the auxiliary sheet,
The topsheet has a central region located at the center in the width direction and a pair of end regions adjacent to both outsides of the central region in the width direction, and the central region is the auxiliary sheet. At least part of the pair of end regions is not bonded to the auxiliary sheet,
The central region of the topsheet has a plurality of holes,
Absorbent articles.
The central region and the pair of end regions of the surface sheet have a plurality of pores,
In a plan view, the area per one pore present in the pair of end regions is smaller than the area per one pore present in the central region,
The absorbent article according to claim 1.
In the surface sheet, the area of the pores in the central region and the pair of end regions is 0.01 mm 2 or more and 25 mm 2 or less in a plan view.
The absorbent article according to claim 2.
In plan view,
The shape of the pores present in the pair of end regions is a shape in which the dimension in the width direction is shorter than the dimension in the longitudinal direction.
The absorbent article according to claim 2 or 3.
The surface sheet is formed of a non-woven fabric, and the fibers present in the end regions among the fibers constituting the non-woven fabric are oriented in the longitudinal direction rather than the fibers present in the central region,
The absorbent article according to any one of claims 1 to 4.
Corresponding to each of the widthwise both ends of the auxiliary sheet, further comprising a pair of side sheets located on the non-skin side of the both ends,
The auxiliary sheet is provided so as to correspond to each of both ends of the auxiliary sheet in the width direction, and the both ends are configured to be wound on the non-skin surface side of the auxiliary sheet. Has
In each of the pair of hollow entrained three-dimensional portions, the end portion in the width direction of the auxiliary sheet is a joint portion to the inner end portion in the width direction of one corresponding to the end portion of the pair of side sheets. Are joined,
The absorbent article according to any one of claims 1 to 5.
In a plan view, in the width direction, a dimension of a portion outside the joint portion in each of the pair of hollow entrainment three-dimensional portions is larger than a dimension of a portion outside the joint portion in the pair of end regions. large,
The absorbent article according to claim 6.
End fixing for fixing the front and rear ends in the longitudinal direction of each of the pair of hollow entrainment three-dimensional parts to the front and rear parts of the inner end of the corresponding side seat of the pair of side seats. Has a section,
In the width direction, the end fixing portion is located outside both end edges of the surface sheet,
The absorbent article according to claim 6 or 7.
Further comprising a pair of squeezing portions formed in a region where the surface sheet and the absorber overlap in the thickness direction,
In the thickness direction, each of the pair of compressed portions has reached a position deeper to the non-skin surface side than the joint portion from the position of the topsheet.
The absorbent article according to any one of claims 6 to 8.
Corresponding to each of the widthwise both ends of the auxiliary sheet, further comprising a pair of side sheets located on the skin side of the both ends,
The pair of side seats is provided corresponding to each of the pair of side seats, and has a pair of three-dimensional gathers located at two end portions facing inward in the width direction of the pair of side seats,
Each of the pair of three-dimensional gathers has an outer end in the width direction as a fixed end and an inner end as a free end,
The surface sheet is positioned between the fixed end of one of the pair of three-dimensional gathers and the other fixed end of the pair of three-dimensional gathers in the width direction, apart from both of the fixed ends. are doing,
The absorbent article according to any one of claims 1 to 5.
End fixing portions for fixing the front and rear ends in the longitudinal direction of each of the pair of three-dimensional gathers to the front and rear portions of the inner end of the corresponding side seats of the pair of side seats. Have,
In the width direction, the end fixing portion is located outside both end edges of the surface sheet,
The absorbent article according to claim 10.
The surface sheet contains a water-retaining fiber,
The absorbent article according to any one of claims 1 to 11.
The surface sheet has an excretory opening contact area in the central area,
The excretory opening contact area contains a weakly water-repellent oil agent,
The absorbent article according to claim 12.