WO2023189733A1

WO2023189733A1 - Absorbent article

Info

Publication number: WO2023189733A1
Application number: PCT/JP2023/010609
Authority: WO
Inventors: 祐介川上
Original assignee: ユニ・チャーム株式会社
Priority date: 2022-03-31
Filing date: 2023-03-17
Publication date: 2023-10-05
Also published as: JP2023150076A

Abstract

An absorbent article (1) comprises a skin-side sheet (31) and a non-skin-side sheet (32) that lies adjacent to the skin-side sheet (31) from the non-skin side, said absorbent article being characterized in that: at least a portion of the non-skin-side sheet (32) is visible from the outside of the absorbent article (1); the non-skin-side sheet (32) is a nonwoven fabric which has formed therein open holes (32h) that penetrate in the thickness direction; and the color of the non-skin-side sheet (32) is different from that of the skin-side sheet (31).

Description

absorbent articles

The present invention relates to absorbent articles.

Conventionally, it has been desired to reduce stuffiness inside absorbent articles such as disposable diapers while being worn. For example, Patent Document 1 discloses a disposable diaper that has an exterior body and an absorbent body that are placed around the wearer's waist when worn, and this disposable diaper has a plurality of through holes that pass through the exterior body. It is known that by providing this, the air permeability of the exterior body is improved and the stuffiness inside is reduced.

JP2015-107223A

However, not only the disposable diaper shown in Patent Document 1, but also general absorbent articles, the entire absorbent article is formed in the same color, such as white, so through-holes are provided to improve breathability. Even if the absorbent article is provided with an absorbent article, there is a problem in that the through hole is difficult to be recognized by the wearer or a person who wants the wearer to wear the absorbent article.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide an absorbent article that makes it easy for the wearer to recognize that the absorbent article has openings. It's about doing.

The main invention for achieving the above object is an absorbent article having a skin-side sheet and a non-skin-side sheet adjacent to the skin-side sheet from the non-skin side, wherein at least a part of the non-skin-side sheet is , which is visible from the outside of the absorbent article, the non-skin side sheet is a non-woven fabric having openings penetrating in the thickness direction, and the color of the non-skin side sheet itself is different from that of the skin side sheet itself. This is an absorbent article characterized by a color different from that of the absorbent article.
Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article that makes it easy for the wearer to recognize that the absorbent article is provided with apertures.

1 is a schematic perspective view of a diaper 1. FIG. FIG. 2 is a plan view of the diaper 1 in an expanded and stretched state, viewed from the non-skin side. 3 is a schematic cross-sectional view taken along line AA in FIG. 2. FIG. 4A is a plan view of the absorbent main body 10, and FIG. 4B is a schematic cross-sectional view of the absorbent main body 10. FIG. 2 is a diagram schematically showing a state in which the constituent members of the diaper 1 are disassembled in the thickness direction. 3 is an enlarged view of portion X in FIG. 2. FIG. 7A is a partially enlarged view of portion Z in FIG. 6. FIG. FIG. 7B is a diagram schematically showing the fibers of the non-skin side sheet 32 in portion Z in FIG.

From the description of this specification and the attached drawings, at least the following matters will become clear.
An absorbent article having a skin-side sheet and a non-skin-side sheet adjacent to the skin-side sheet from the non-skin side, wherein at least a part of the non-skin-side sheet is visible from the outside of the absorbent article. and the non-skin side sheet is a non-woven fabric having apertures penetrating in the thickness direction, and the color of the non-skin side sheet itself is different from the color of the skin side sheet itself. It is an article.

According to such an absorbent article, the color of the non-skin-side sheet itself is different from the color of the skin-side sheet itself that is visible through the apertures, making it difficult for the wearer of the absorbent article or the person wearing the absorbent article to wear the absorbent article. This makes it easy for a person who intends to use the absorbent article to recognize that the absorbent article has an aperture.

In such an absorbent article, the skin-side sheet is preferably a white nonwoven fabric.

According to such an absorbent article, since the skin-side sheet made of white non-woven fabric easily transmits the skin color, the skin color cannot be visually recognized when the skin-side sheet is viewed from the non-skin side through the apertures. This can easily give the wearer the impression that the skin-side sheet has holes even if it does not have holes, or that the skin-side sheet is made of thin material. This makes it easier for the wearer to recognize the breathability of the absorbent article while reducing the risk of a decrease in strength that would occur when holes are provided in the sheet. In addition, if the non-skin side sheet itself is colored, the wearer can easily recognize the presence of the aperture due to the difference in color from the white color of the skin side sheet that is visible through the aperture from the non-skin side. Become.

In such an absorbent article, the non-skin side sheet is preferably a long fiber nonwoven fabric containing long fibers, and the non-skin side sheet itself is preferably colored.

According to such an absorbent article, the strength of the non-skin side sheet can be improved compared to a non-woven fabric made only of short fibers, so even when force is applied to the non-skin side sheet, the edges of the openings are While reducing the risk of damage and making it easier to maintain the shape of the opening in the non-skin side sheet, the difference in color between the colored non-skin side sheet itself and the color of the skin side sheet itself makes it easier for the wearer, etc. The opening can be made easier to see.

In such an absorbent article, it is desirable that, in the non-skin side sheet, the fiber density at the edge of the aperture is higher than the fiber density at the outer portion adjacent to the edge from the outside.

According to such an absorbent article, it is easier to recognize the difference in color between the edge and the skin-side sheet through the aperture than when the fiber density of the edge is lower than that of the outer portion, This makes it easier to recognize the presence of the opening.

In such an absorbent article, it is preferable that the non-skin side sheet has a joint portion that joins the fibers, and that at least one joint portion is provided at the edge of the aperture.

According to such an absorbent article, the joint portion has higher rigidity than the unjoined portion, so providing the joint portion at the edge makes it easier to maintain the shape of the opening.

In such an absorbent article, it is preferable that the non-skin side sheet includes a protrusion protruding toward the skin side or the non-skin side at the edge of the opening.

According to such an absorbent article, the protrusions of the non-skin side sheet have a higher fiber density than the parts other than the protrusions, so when viewed from the non-skin side, the protrusions have a higher fiber density than the parts other than the protrusions. Since the color of the non-skin side sheet itself appears dark, it becomes easier for the wearer to recognize the edges of the openings. Further, when the protrusion protrudes toward the non-skin side, the aperture becomes more likely to appear as if it is three-dimensionally formed, making it easier for the wearer and the like to recognize the aperture.

In such an absorbent article, it is desirable that the fibers of the non-skin side sheet have a portion in which the fibers of the non-skin side sheet are not fused together at the edge of the opening.

According to such an absorbent article, the non-skin side sheet makes the edges of the apertures softer than when all the edges of the apertures are fused, and Since the density of the fibers at the edges of the apertures can be made higher than in other parts, the non-skin side sheet is comfortable to the touch, and the apertures can be easily recognized by the wearer.

In such an absorbent article, the non-skin side sheet has a joint portion that joins the fibers, and in the non-skin side sheet, the total area of the openings provided per unit area is equal to the joint area. It is desirable that the area be smaller than the total area of the section.

According to such an absorbent article, there is a risk that the strength due to the provision of the holes will be reduced compared to when the total area of the holes provided per unit area is larger than the total area of the joints. It can be reduced.

In such an absorbent article, the non-skin side sheet has a plurality of joints joining fibers to each other, and in a stretched state, the minimum distance between the centers of the openings is equal to the distance between the centers of the joints. It is desirable that the distance be longer than the maximum value of the distance between the centers.

According to such an absorbent article, it is possible to bond the fibers of the non-skin side sheet more easily than when the minimum distance between the centers of the openings is shorter than the maximum distance between the centers of the joints. This makes it easier to maintain the sheet shape of the non-skin side sheet.

Such an absorbent article has an elastic member that expands and contracts in an elastic direction, and in an expanded state, the length of the opening in the expansion and contraction direction is equal to the length of the opening in a direction perpendicular to the expansion and contraction direction. It is desirable that it be longer than that.

According to such an absorbent article, even when the elastic member is in a contracted state, the presence of the opening can be easily recognized.

In such an absorbent article, it is desirable that the skin-side sheet and the non-skin-side sheet have a bonded portion at the edge of the opening.

According to such an absorbent article, the shape of the aperture is easily maintained in the part where the skin-side sheet and the non-skin-side sheet are bonded, so the shape of the aperture is easily maintained not only before wearing but also during wear. This makes it easier to maintain the shape of the opening, improves breathability, and makes it easier for the wearer to recognize the opening.

In such an absorbent article, it is desirable that the skin-side sheet and the non-skin-side sheet have a portion that is not bonded to each other at the edge of the opening.

According to such an absorbent article, the edges of the openings in the non-skin-side sheet are areas where the fiber density tends to be high, so the edges of the openings in the non-skin-side sheet are similar to the skin-side sheet. By having a portion that is not bonded to the non-skin side sheet, it is possible to reduce the possibility that the edge of the opening becomes excessively hard, and it is possible to improve the feel on the skin.

Such an absorbent article has a rubber thread between the skin side sheet and the non-skin side sheet, and has a portion where the rubber thread overlaps the opening when viewed from the non-skin side. This is desirable.

According to such an absorbent article, the rubber thread becomes visible from the outside through the aperture, making it easier for the wearer to recognize the presence of the aperture.

In such an absorbent article, it is desirable that the color of the rubber thread is different from the color of the non-skin side sheet itself.

According to such an absorbent article, the color of the rubber thread visible through the apertures is different from the color of the non-skin side sheet itself, making it easier for the wearer etc. to recognize the presence of the apertures.

Such an absorbent article includes a rubber thread that expands and contracts in the stretching direction between the skin side sheet and the non-skin side sheet, and the length of the opening in the direction perpendicular to the stretching direction. , is preferably longer than the diameter of the rubber thread.

According to such an absorbent article, the length of the rubber thread in the direction orthogonal to the direction of expansion and contraction of the opening is shorter than the diameter of the rubber thread when viewed from the non-skin side. This can reduce the risk of overlap. In addition, even if at least a portion of the rubber thread overlaps the opening when viewed from the non-skin side, it reduces the possibility that the entire opening will be covered with the rubber thread, making it easier to see from the outside. Sometimes, the color of the skin-side sheet becomes visible, making it easier for the wearer to recognize the presence of the apertures in the absorbent article.

In such an absorbent article, it is desirable that the skin-side sheet does not have the apertures.

According to such an absorbent article, the color of the skin-side sheet can be more easily recognized through the aperture than when the skin-side sheet has an aperture, making it easier to recognize the presence of the aperture.

===This embodiment===
As an absorbent article according to the present invention, a pants-type disposable diaper 1 (hereinafter also referred to as "diaper 1") will be described as an example. However, the absorbent articles according to the present invention also include tape-type disposable diapers, short-type napkins, absorbent pads, sanitary napkins, and other absorbent articles. Furthermore, the wearer of the absorbent article may be an infant, an adult, or a living creature such as an animal.

<Configuration of diaper 1>
FIG. 1 is a schematic perspective view of a diaper 1. FIG. 2 is a plan view of the diaper 1 in the unfolded and stretched state, viewed from the non-skin side. FIG. 3 is a schematic cross-sectional view taken along line AA in FIG. Note that the "stretched state" of the diaper 1 refers to a state in which the entire diaper 1 (the entire product) is stretched without wrinkles, and specifically, the "stretched state" of the diaper 1 refers to a state in which the entire diaper 1 (the entire product) is stretched without wrinkles. This refers to a state in which the dimensions of the waist member 20, etc.) match or are close to the dimensions of the member alone.

The diaper 1 has vertical, horizontal, and longitudinal directions that intersect with each other, and has a waist opening BH and a pair of leg openings LH, LH. The upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side. The front side in the front-back direction corresponds to the wearer's ventral side, and the rear side corresponds to the wearer's dorsal side. The left-right direction is a direction along the stretching direction of the

rubber threads

35 and 45 of the front waist portion 30 and the rear waist portion 40. The up-down direction is a direction along a direction perpendicular to the direction of expansion and contraction, and corresponds to the longitudinal direction of the absorbent main body 10. Moreover, as shown in FIG. 3, the direction in which the materials constituting the diaper 1 are laminated is defined as the thickness direction. The side in contact with the wearer's skin in the thickness direction is defined as the skin side, and the opposite side is defined as the non-skin side.

The diaper 1 is a so-called three-piece type of pants that has a liquid-absorbing absorbent main body 10, a front waist portion 30 that covers the wearer's abdominal region, and a rear waist region 40 that covers the wearer's back region. It is a type diaper.

In the unfolded state shown in FIG. 2, the front waist portion 30 and the rear waist portion 40 are vertically spaced from each other and lined up in parallel, and the absorbent main body 10 is stretched between them. Each longitudinal end portion 10ea, 10eb of the main body 10 is bonded and fixed to the skin side of the

nearest waist portion

30, 40, respectively, and the external shape is approximately H-shaped in plan view. Then, from this state, the absorbent main body 10 is folded in half with the longitudinal center position CL as the folding position. In this bi-folded state, the front waist portion 30 and the rear waist portion 40 facing each other are joined and connected to each other at the side portions 30sw and 40sw on both sides in the left-right direction, and the pair of side

joint portions

50, 50 is formed. That is, the front waist portion 30 and the rear waist portion 40 are formed into an annular shape by the pair of side joints 50, 50. As a result, the diaper 1 becomes a pants-shaped diaper 1 in which a waist opening BH and a pair of leg openings LH and LH are formed as shown in FIG. Note that the side joint portion 50 is formed by a known joining means such as welding or adhesion.

(Absorbent main body 10)
The absorbent main body 10 is applied to the wearer's groin area and absorbs excrement such as urine. 4A is a plan view of the absorbent main body 10, and FIG. 4B is a schematic cross-sectional view of the absorbent main body 10. The absorbent body 10 includes an absorbent core 11 that absorbs excretory liquid, a top sheet 12 located closer to the skin than the absorbent core 11, and a back sheet 13 located closer to the non-skin side than the absorbent core 11. and has. However, the absorbent main body 10 may include sheet members other than this. For example, a second sheet (not shown) may be provided between the top sheet 12 and the absorbent core 11 in the thickness direction.

The absorbent core 11 is a member that absorbs and retains excretory liquid such as urine, and is formed of liquid absorbent fibers such as pulp fibers mixed with super absorbent polymer (SAP). Note that the outer peripheral surface of the absorbent core 11 may be covered with a liquid-permeable sheet member (core wrap sheet 11b) such as tissue paper or nonwoven fabric. Further, in this embodiment, the absorbent core 11 is in a state in which two layers are stacked in the thickness direction as shown in FIG. 4B, but the shape of the absorbent core 11 is not limited to this.

The top sheet 12 is a liquid-permeable sheet, and for example, a hydrophilic air-through nonwoven fabric, a spunbond nonwoven fabric, or the like is used. In this embodiment, both sides in the left and right direction are folded back toward the non-skin side so as to wrap around the absorbent core 11 as shown in FIG. 4B.

The backsheet 13 has a two-layer structure including a liquid-impermeable sheet 13a and a hydrophobic exterior sheet 13b disposed on the non-skin side. As the liquid-impermeable sheet 13a, for example, a resin film or the like is used, and as the exterior sheet 13b, for example, a flexible nonwoven fabric or the like is used.

A pair of leakage prevention walls 15 are provided on both sides of the absorbent body 10 in the left-right direction along the longitudinal direction of the absorbent body 10. In this embodiment, the leak-proof wall portion 15 is formed of an exterior sheet 13b. Specifically, in the left-right direction, a part of the exterior sheet 13b extends outward from both ends of the absorbent core 11 and is bent at multiple points toward the skin side as shown in FIG. 4B, thereby forming a pair of leak-proofing sheets. A wall portion 15 is formed. A leak-proof wall elastic member 16 such as a rubber thread is attached to the skin-side end (tip) of the leak-proof wall portion 15 in a state of being extended along the longitudinal direction of the absorbent body 10 . When the diaper 1 is worn, the leak-proof wall portion 15 stands up on the wearer's skin side based on the elasticity exhibited by the leak-proof wall elastic member 16, and fits the wearer's crotch region.

Furthermore, leg elastic members 17 such as thread rubber are attached to both sides of the absorbent body 10 in the left-right direction in a state extending along the longitudinal direction of the absorbent body 10. When the diaper 1 is worn, both sides of the absorbent main body 10 contract based on the elasticity exhibited by the leg elastic members 17, making it easier to fit around the wearer's legs.

(Front waist part 30)
The front waist portion 30 is arranged on the non-skin side of the absorbent main body 10. As shown in FIG. 3, the front waist portion 30 includes a skin-side sheet 31 disposed closest to the skin in the thickness direction, and a non-skin side laminated adjacent to the non-skin side of the skin-side sheet 31. It has a sheet 32 and a thread rubber (waist elastic member) 35 provided between the skin side sheet 31 and the non-skin side sheet 32. The front waist portion 30 basically has a two-layer structure of a skin-side sheet 31 and a non-skin-side sheet 32, but partially has a structure of three or more layers, such as a skin-side sheet 36 (described later). You can leave it alone.

The skin-side sheet 31 is a white sheet member that is rectangular in plan view, and is made of, for example, SMS nonwoven fabric. The skin-side sheet 31 may have a plurality of joints (not shown) for welding and joining the fibers forming the skin-side sheet 31 to each other. Note that the skin-side sheet 31 is not provided with through-holes corresponding to openings 32h (described later).

The non-skin side sheet 32 is a blue (colored) sheet member formed of a nonwoven fabric that is rectangular in plan view, and is formed of a nonwoven fabric, for example, an SMS nonwoven fabric. The non-skin side sheet 32 is provided with a plurality of joints 32m (see FIG. 6) for joining the fibers that make up the non-skin side sheet 32. In the joint portion 32m, the non-woven fabric fibers forming the non-skin side sheet 32 are joined by heat welding in the thickness direction, and by providing the joint portion 32m, it is possible to reduce the falling of the fibers of the non-skin side sheet 32. , making it easier to maintain the sheet shape. Further, the non-skin side sheet 32 is provided with a plurality of apertures 32h. The opening portion 32h is a through hole that penetrates the non-skin side sheet 32 in the thickness direction. The openings 32h are not penetrating portions formed by gaps between fibers in the non-skin side sheet 32, but are made by using pins (protrusions), blades, etc., in the non-woven fabric formed into a sheet shape as the non-skin side sheet 32. This is an opening formed by processing the sheet 32 to penetrate it in the thickness direction. By providing the opening 32h, the air permeability of the front waist portion 30 can be improved. The apertures 32h of this embodiment are arranged in a staggered manner over the entire area of the non-skin side sheet 32, and each aperture 32h has a circular shape with a diameter of about 1 mm, for example. The shape and arrangement (number and pattern) of 32h can be changed as appropriate.

The front waist portion 30 of this embodiment has a folded portion 32f in which the upper end of the non-skin side sheet 32 is folded back from the non-skin side to the skin side and from the front side to the rear side in the longitudinal direction. By covering a part (upper end portion) of the skin-side sheet 31 with the folded portion 32f, the upper end edge of the skin-side sheet 31 is prevented from digging into the wearer's skin. However, the folded portion 32f does not necessarily have to be provided.

The rubber thread 35 is an extensible member that is provided along the left-right direction and can be expanded and contracted in the left-right direction, and in this embodiment, white rubber thread is used. A plurality of rubber threads 35 are arranged between the skin-side sheet 31 and the non-skin-side sheet 32 in a vertically lined manner, and are attached so as to be stretched in the left-right direction. Due to the elasticity exhibited by the rubber thread 35, the front waist portion 30 fits around the wearer's ventral waist. In addition, although the diaper 1 of this embodiment is provided with the thread rubber 35 in the front waist part 30, it is not limited to thread rubber, but a stretchable member such as an elastic sheet can be arranged to make the front waist part 30 expand and contract in the left-right direction. Good too.

The rubber thread 35 can be attached using an adhesive such as a hot melt adhesive. For example, the rubber thread 35 can be attached by applying a hot melt adhesive to the rubber thread 35, stretching it at a predetermined stretching ratio, and sandwiching it between the skin-side sheet 31 and the non-skin-side sheet 32. That is, the skin-side sheet 31 and the non-skin-side sheet 32 are bonded to each other with an adhesive via the rubber thread 35.

Additionally, the front waist portion 30 may include a skin sheet 36. As shown in FIG. 3, the skin sheet 36 is a white sheet member disposed to cover the upper end of the absorbent main body 10 from the skin side, and has a function as a cover sheet. This prevents the upper edge of the absorbent body 10 from digging into the wearer's skin when the diaper 1 is worn. The skin sheet 36 is made of, for example, SMS nonwoven fabric. Note that the skin sheet 36 does not necessarily have to be provided.

(Rear side girth part 40)
The rear waistline portion 40 has substantially the same configuration as the front waistline portion 30. That is, the rear waist portion 40 is arranged on the non-skin side of the absorbent main body 10, and is adjacent to the skin-side sheet 41 disposed closest to the skin in the thickness direction and on the non-skin side of the skin-side sheet 41. The non-skin side sheet 42 is laminated in such a manner that the skin side sheet 42 is laminated, and the rubber thread 45 is provided between the skin side sheet 41 and the non-skin side sheet 42 and extends in the left-right direction. Further, like the front waist portion 30, it may include a folded portion 42f, a white skin sheet 46, etc. (see FIGS. 2 and 3).

Similar to the front waist portion 30, the skin side sheet 41 is a white sheet member, and is formed of, for example, SMS nonwoven fabric. The skin-side sheet 41 may have a plurality of joints (not shown) for welding and joining the fibers forming the skin-side sheet 41 to each other. The skin side sheet 41 is not provided with a through hole corresponding to an opening 42h (described later).

The non-skin side sheet 42 is a blue (colored) sheet member made of nonwoven fabric, and is made of, for example, SMS nonwoven fabric. The non-skin side sheet 42 has a plurality of joints (not shown) for welding and joining the fibers forming the non-skin side sheet 42 to each other. Further, the non-skin side sheet 42 is provided with a plurality of apertures 42h. The opening portion 42h is a through hole that penetrates the non-skin side sheet 42 in the thickness direction. The apertures 42h are arranged in a staggered manner over the entire area of the non-skin side sheet 42, and each aperture 42h has a circular shape with a diameter of about 1 mm, for example, but the shape of the aperture 42h and The arrangement (number and pattern) can be changed as appropriate.

The rubber thread 45 is an extensible member that is provided along the left-right direction and can be expanded and contracted in the left-right direction, and in this embodiment, white rubber thread is used. A plurality of rubber threads 45 are arranged between the skin-side sheet 41 and the non-skin-side sheet 42 in a vertically aligned manner, and are attached in a state in which they are stretched in the left-right direction. Due to the elasticity exhibited by the rubber thread 45, the rear waist portion 40 fits around the wearer's back waist. In addition, although the diaper 1 of this embodiment is provided with the thread rubber 45 in the rear waist part 40, it is not limited to the thread rubber, and an elastic member such as an elastic sheet may be arranged to expand and contract the rear waist part 40 in the left-right direction. You may let them.

The external shape of the rear waist part 40 is different from the front waist part 30, as shown in FIG. have. In the crotch region 40b, the width increases from the lower side to the upper side in the vertical direction, and the provision of the crotch region 40b allows the rear waist portion 40 to touch the wearer's buttocks when wearing the diaper 1. Can be coated. That is, the crotch region 40b has a function as a buttock cover.

A curved elastic member 47 such as a rubber thread as shown in FIG. 2 is provided in the crotch region 40b. The curved elastic member 47 is attached between the skin-side sheet 41 and the non-skin-side sheet 42 while extending along the outer edge of the crotch region 40b, and due to the elasticity exhibited by the curved elastic member 47, the diaper 1 When worn, the crotch region 40b of the rear waist portion 40 easily fits the wearer's buttocks and is less likely to roll up from the buttocks.

<About the state of diaper 1 viewed from the outside>
As described above, the diaper 1 has the

openings

32h and 42h in the non-skin side sheet 32 of the front waistline section 30 and the non-skinside sheet 42 of the rear waistline section 40, respectively, so that the front waistline section 30 It is possible to improve the breathability of the rear waist portion 40 and reduce stuffiness inside when worn. However, in conventional disposable diapers, the members constituting the front waist part 30 and the rear waist part 40 are generally all formed in the same color (for example, white), so the diaper 1 can be visually recognized from the outside. In such a case, there is a risk that the wearer of the diaper 1 or a person who is trying to make the wearer wear the diaper 1 (hereinafter also referred to as the "wearer, etc.") may not recognize the existence of the

openings

32h and 42h. was there.

On the other hand, the front waist section 30 of the diaper 1 of this embodiment has a skin-side sheet 31 and a non-skin-side sheet 32 adjacent to the skin-side sheet 31 from the non-skin side. At least a portion of the diaper 1 is visible from the outside of the diaper 1. This non-skin side sheet 32 is a non-woven fabric having apertures 32h passing through in the thickness direction, and the color of the non-skin side sheet 32 itself is different from the color of the skin side sheet 31 itself.

FIG. 5 is a diagram schematically showing a state in which the constituent members of the diaper 1 are disassembled in the thickness direction. Note that in FIG. 5, the folded

portions

32f and 42f are omitted. As shown in FIG. 5, in the thickness direction, the front waist portion 30 is arranged in the following order from the non-skin side to the skin side: a blue non-skin side sheet 32, a white rubber thread 35, a white skin side sheet 31, and a white skin side sheet 32. The skin sheets 36 are stacked in this order. That is, in the diaper 1, the color of the non-skin-side sheet 32 located closest to the non-skin side of the front waist portion 30 is different from the color of the members (skin-side sheet 31, rubber thread 35) located closer to the skin than the non-skin-side sheet 32. , and the color of the skin surface sheet 36).

Since the color of the non-skin side sheet 32 itself having the apertures 32h is different from the color of the skin side sheet 31 itself, when the wearer etc. visually recognizes the diaper 1 from the outside, the color of the non-skin side sheet 32 itself is different from the color of the skin side sheet 31 itself. Since the color of the skin-side sheet 31 that is visible through the aperture 32h can be recognized, it becomes easier for the wearer etc. to recognize the existence of the aperture 32h.

In the diaper 1, not only the front waist part 30 but also the rear waist part 40, the color of the non-skin side sheet 42 itself having the openings 42h is different from the color of the skin side sheet 41 itself, When the wearer etc. visually recognizes the diaper 1 from the outside, the wearer etc. can recognize the color of the non-skin side sheet 42 itself and the color of the skin side sheet 41 visually recognized through the aperture 42h. This makes it easier for the user to recognize the existence of the opening 42h. The following will mainly describe the front waist portion 30, but the same applies to the rear waist portion 40.

Note that "the color of the skin-side sheet 31 itself" and "the color of the non-skin-side sheet 32 itself" are the colors of the skin-side sheet 31 and the non-skin-side sheet 32 themselves, and the color of the skin-side sheet 31 as a whole, the color of the non-skin-side sheet 32 itself. This is the color of the entire skin side sheet 32. When the surface of the skin-side sheet 31 or the surface of the non-skin-side sheet 32 has a design or pattern, "the color of the skin-side sheet 31 itself" and "the color of the non-skin-side sheet 32 itself" are determined by the design. This is the color before adding any patterns or patterns. In this embodiment, since the color of the fibers of the nonwoven fabric constituting the skin-side sheet 31 is white, the color of the skin-side sheet 31 itself is white. Blue resin (polypropylene resin) is used as the raw material for the fibers of the non-skin side sheet 32, and the color of the nonwoven fabric formed from this blue fiber is blue, so the color of the non-skin side sheet 32 itself is blue. It is.

Like the diaper 1, the skin-side sheet 31 is preferably a white nonwoven fabric. The skin-side sheet 31 made of white nonwoven fabric easily transmits skin color. Therefore, when the diaper 1 is viewed from the non-skin side (from the outside) and the skin-side sheet 31 is seen through the aperture 32h, the wearer's skin color can be easily seen through the skin-side sheet 31. As a result, the skin-side sheet 31 may appear to have holes even though it does not have any holes, or the skin-side sheet 31 may appear to be made of a thin material, so that the wearer, etc. The diaper 1 tends to give the impression that its breathability is improved. If a perforated portion is provided in the skin-side sheet 31, the strength of the skin-side sheet 31 and the front waist portion 30 may be reduced. On the other hand, by making the non-skin-side sheet 32 include the perforations 32h and making the skin-side sheet 31 itself white in color, the skin-side sheet 31 can be easily The wearer and the like can easily recognize the breathability of the diaper 1 while reducing the decrease in strength of the front waist portion 30. Moreover, when the color of the non-skin side sheet 32 itself is colored, by making the color of the skin side sheet 31 itself white, when the diaper 1 is viewed from the non-skin side, it can be visually recognized through the aperture 32h. Since the color of the skin-side sheet 31 itself is more distinct from the color of the non-skin-side sheet 32 itself, it becomes easier for the wearer and the like to recognize the existence of the apertures 32h.

Further, the non-skin side sheet 32 is preferably a long fiber nonwoven fabric containing long fibers, and it is preferable that the non-skin side sheet 32 itself is colored. This reduces damage to the non-skin side sheet 32 and makes it easier for the wearer to recognize the difference between the color of the colored non-skin side sheet 32 itself and the color of the skin side sheet 31 itself. This makes it easier to recognize the existence of the portion 32h.

The long fiber nonwoven fabric is a nonwoven fabric containing long fibers, and the long fibers refer to fibers with an average fiber length exceeding 100 mm. On the other hand, short fibers are fibers that have been cut and have an average fiber length of 15 mm or more and 100 mm or less. The strength of the non-skin side sheet 32 can be improved compared to a non-woven fabric in which the non-skin side sheet 32 is formed only of short fibers. In particular, providing the non-skin side sheet 32 with the openings 32h may reduce the strength of the sheet, so by using a long fiber nonwoven fabric containing long fibers, the strength of the non-skin side sheet 32 is improved. Thus, damage to the non-skin side sheet 32 can be reduced. Furthermore, even when force is applied to the non-skin side sheet 32, the risk of damage to the edges of the apertures 32h can be reduced, making it easier to maintain the shape of the apertures 32h. In the diaper 1, a force along the left-right direction is likely to be applied to the non-skin side sheet 32 due to the expansion and contraction of the rubber thread 35. Therefore, by being made of long fiber nonwoven fabric, damage to the non-skin side sheet 32 due to force applied in the left and right direction is reduced, damage to the aperture 32h is reduced, and the aperture shape of the aperture 32h is reduced. This makes it easier for the wearer to visually recognize the openings.

"Colored" refers to colors other than colorless and transparent and white. On the other hand, "white" includes, for example, the color expressed as "N9.5" in the Munsell color system and the color expressed as "255, 255, 255" in the RGB color space (so-called pure white). , colors whose color difference from pure white is less than 12 are also included in white. To measure the color difference of white, for example, Konica Minolta CR-300 can be used as a color difference measuring device, and a C light source (standard of the Commission Internationale de l'Eclairage (CIE)) can be used as the light source of the measuring device. be able to. The diameter of the measuring window of the measuring instrument in this case is 40 mm. The color differences are ΔL, Δa, and Δb in the (L*a*b*) color space with respect to a white reference plate. The color difference with respect to the white reference plate can be calculated by measuring the lab value of the white reference plate and the lab value of the target sample. The white reference plate is set to lab0 at (X93.19, Y95.20, Z112.28). Here, L is a value indicating brightness, and a and b are plane coordinates of chromaticity. Assuming that the Lab values of the white reference plate are L0, a0, and b0, and the target sample is L1, a1, and b1, it can be calculated as ΔL=L0-L1, Δa=a0-a1, and Δb=b0-b1.

The non-skin side sheet 32 of the diaper 1 of this embodiment is blue (colored). As mentioned above, the color of the non-skin side sheet 32 itself is made blue by applying a blue resin to white fibers, which is then formed into a sheet to form a nonwoven fabric. By making the non-skin side sheet 32 colored, the difference in color from the skin side sheet 31 that is visible through the aperture 32h of the non-skin side sheet 32 is highlighted, and the presence of the aperture 32h is recognized by the wearer. It becomes easier to do so. In particular, when the skin-side sheet 31 is white as in the diaper 1, the difference in color between the colored non-skin-side sheet 32 and the skin-side sheet 31 is even more noticeable. etc. will be easier to recognize.

Furthermore, it is preferable that the skin-side sheet 31 has no openings. If the skin-side sheet 31 has apertures, the apertures of the skin-side sheet 31 and the apertures 32h of the non-skin-side sheet 32 may overlap in the thickness direction. It becomes difficult to visually recognize the color of the skin-side sheet 31 itself through the aperture 32h of the sheet 32. Therefore, the color of the skin-side sheet 31 itself is easier to see through the apertures 32h provided in the non-skin-side sheet 32 than when the skin-side sheet 31 has an aperture, and the presence of the aperture 32h This makes it easier for the wearer to recognize.

Further, as described above, in the diaper 1 having the rubber thread 35 that expands and contracts in the left-right direction (stretching direction), as shown in FIG. is preferably longer than the length H32h of the opening 32h in the vertical direction (orthogonal direction perpendicular to the direction of expansion and contraction) (W32h>H32h). FIG. 6 is an enlarged view of portion X in FIG. When the rubber thread 35 contracts, the front waist portion 30 is shrunk in the left-right direction, and the aperture 32h is also shrunk in the left-right direction. Therefore, by making the length W32h of the aperture 32h in the left-right direction longer than the length H32h of the aperture 32h in the vertical direction, the shape of the aperture 32h can be maintained even when the rubber thread 35 is contracted. This makes it easier for the wearer and the like to recognize the existence of the aperture 32h.

As described above, the rubber thread 35 is provided between the skin side sheet 31 and the non-skin side sheet 32 (see FIGS. 3 and 5). When the diaper 1 is viewed from the non-skin side (exterior), the rubber thread 35 may have a portion that overlaps with the opening 32h. As shown in FIG. 6, in the diaper 1 according to the present embodiment, the plurality of apertures 32h include an aperture 32h having a portion overlapping with the thread rubber 35 and a thread It has an opening 32h that does not overlap the rubber 35. For example, as shown in FIG. 7A, in portion Z of FIG. 6, the rubber thread 35 can be visually recognized through the opening 32h. 7A is a partially enlarged view of portion Z in FIG. 6. FIG. In this way, the rubber thread 35 can be visually recognized from the non-skin side (outside) of the diaper 1 through the aperture 32h, making the wearer aware that the diaper 1 is equipped with the aperture 32h. It becomes easier.

Furthermore, when the diaper 1 is viewed from the non-skin side (outside), if the rubber thread 35 has a portion that overlaps with the opening 32h, the color of the rubber thread 35 is different from the color of the non-skin side sheet 32 itself. It is preferable. In the diaper 1 of this embodiment, the color of the rubber thread 35 is white, and the color of the non-skin side sheet 32 itself is blue. This makes it easier for the wearer to recognize the presence of the aperture 32h due to the difference in color of the rubber thread 35 that is visible from the aperture 32h and the color of the non-skin side sheet 32 itself. In the diaper 1 of this embodiment, the color of the rubber thread 35 is white, which is the same color as the skin-side sheet 31 itself, but the color is not limited to this. The color of the rubber thread 35 may be different from the color of the non-skin side sheet 32 itself, and may also be different from the color of the skin side sheet 31 itself. The difference in color between the rubber thread 35, the non-skin side sheet 32, and the skin side sheet 31 allows the wearer to easily recognize the presence of the aperture 32h.

In addition, when the rubber thread 35 is provided between the skin side sheet 31 and the non-skin side sheet 32 (see FIGS. 3 and 5), as shown in FIG. It is preferable that the length H32h in the direction perpendicular to the direction of expansion and contraction of the rubber thread 35 is longer than the diameter r35 of the rubber thread 35. As a result, when the diaper 1 is viewed from the non-skin side (from the outside), the length H32h in the vertical direction of the aperture 32h is shorter than the diameter r35 of the rubber thread 35. 32h can be reduced. Since the thread rubber 35 and the opening 32h do not overlap, the air permeability of the front waist portion 30 is improved, and the wearer etc. can easily recognize that the air permeability is improved. Further, as shown in FIG. 7A, even if at least a portion of the thread rubber 35 overlaps the opening 32h when the diaper 1 is viewed from the non-skin side, all of the opening 32h is covered with the thread rubber 35. Therefore, when the diaper 1 is viewed from the outside, the color of the skin-side sheet 31 can be visually recognized through the openings 32h, and the color of the skin-side sheet 31 can be seen through the openings 32h of the diaper 1. The presence and the openings 32h make it easier for the wearer to recognize that the breathability is improved.

Regarding the non-skin side sheet 32 provided with the apertures 32h, it is preferable that the fiber density of the edge 32e of the aperture 32h is higher than the fiber density of the outer portion 32s adjacent to the edge 32e from the outside. FIG. 7B is a diagram schematically showing the fibers of the non-skin side sheet 32 in portion Z in FIG. For example, in the diaper 1 of this embodiment, the edge 32e of the aperture 32h refers to a region 0.5 mm from the edge (end) of the aperture 32h, and the edge 32e of the aperture 32h The fiber density refers to the average density of fibers at this edge 32e. Further, the outer portion 32s adjacent to the edge 32e from the outside refers to an area at a distance of 0.5 mm from the outer end of the edge 32e in the diaper 1 of the present embodiment, and the fiber density of the outer portion 32s is refers to the average density of fibers in this outer portion 32s. As shown in FIG. 7B, by making the fiber density of the edge 32e higher than the fiber density of the outer portion 32s, the fiber density of the edge 32e is lower than that of the outer portion 32s. The color of the skin-side sheet 32 itself appears dark. Therefore, it becomes easier for the wearer etc. to recognize the difference in color between the edge 32e and the skin-side sheet 31 passed through the aperture 32h.

Note that the difference in fiber density between the edge 32e and the outer portion 32s of the non-skin side sheet 32 of this embodiment is provided by forming the openings 32h in the non-skin side sheet 32 during the manufacturing process of the diaper 1. In the present embodiment, the non-skin side sheet 32, in which the fiber density of the edge 32e is made higher than the fiber density of the outer portion 32s by forming the openings 32h in advance, is overlapped with the thread rubber 35 and the skin side sheet 31. Thus, a front waist portion 30 is formed. Specifically, with the non-skin side sheet 32 sandwiched between a first roll having a plurality of pins on its outer circumferential surface and a second roll having holes on its outer circumferential surface, the pins of the first roll are By inserting it into the hole of the second roll, the opening 32h can be formed. At this time, the fibers of the non-skin side sheet 32 are expanded as the openings 32h are formed by inserting the pins of the first roll, so that the fiber density of the edge 32e becomes high. This makes the fiber density of the edge portion 32e higher than that of the outer portion 32s.

Further, it is preferable that the edge 32e of the opening 32h provided in the non-skin side sheet 32 has a portion where the fibers of the non-skin side sheet 32 are not fused together. Normally, the portion of the non-skin side sheet 32 where the fibers are fused together tends to be harder than the portion of the non-skin side sheet 32 where the fibers are not fused together. Therefore, in the non-skin side sheet 32, by having a portion where the fibers of the non-skin side sheet 32 are not fused together at the edge 32e, the openings are larger than when the entire edge 32e is fused. The edge 32e of the portion 32h can be made softer, and the feel of the non-skin side sheet 32 can be improved. Further, as in the above-described method for forming the aperture 32h, the aperture 32h is formed by inserting a pin or the like, and when the fiber density of the edge 32e of the aperture 32h is higher than that of the outer portion 32s, In this case, the color of the edge portion 32e is darker than that of the outer portion 32s, making it easier for the wearer to recognize the difference in color between the skin-side sheet 31 and the aperture 32h, and making it easier for the wearer to recognize the existence of the aperture 32h. Become.

The non-skin side sheet 32 of this embodiment is formed of SMS nonwoven fabric as described above, and when the fibers (polypropylene resin) that make up the SMS nonwoven fabric are heated, the fibers are welded to each other. Therefore, by forming the opening 32h of the non-skin side sheet 32 of the diaper 1 with the first roll (described above) equipped with a pin that does not apply heat, there is a risk of fusion of the fibers of the edge 32e. The opening portion 32h can be formed while reducing the amount of damage.

The edge 32e of the opening 32h of the non-skin side sheet 32 may have a protrusion protruding toward the skin side or the non-skin side. The protruding portion of the non-skin side sheet 32 has a higher fiber density than the portion where the protruding portion is not provided. Therefore, in the protrusions with high density, the color of the non-skin side sheet 32 itself appears dark, so the difference in color from the color of the skin side sheet 31 itself that is visually recognized through the aperture 32h tends to be clear, and the protrusion part 32h has a high density. This makes it easier for the wearer to recognize the edges of the wearer.

In addition, in the manufacturing process of the diaper 1, when the non-skin side sheet 32, the thread rubber 35, and the skin side sheet 31 are overlapped after the openings 32h are formed in the non-skin side sheet 32, the protrusions are It is also possible to provide it on the skin side of the non-skin side sheet 32 or on the non-skin side. When the non-skin side sheet 32 includes a protrusion that protrudes toward the non-skin side, when the diaper 1 is viewed from the non-skin side (exterior), the opening 32h appears to be three-dimensionally formed. This makes it easier for the wearer and the like to visually recognize the aperture 32h.

Examples of the protrusions include so-called burrs when a protrusion such as a pin (described above) is inserted into the non-skin side sheet 32 to form the opening 32h during the manufacturing process. At this time, by using a heated protrusion such as a pin, it becomes easier to form the protrusion and maintain the shape of the protrusion protruding toward the skin side or the non-skin side. In addition, like the diaper 1 of this embodiment, the opening 32h is formed by inserting the pin of the first roll in a state where no heat is applied into the non-skin side sheet 32, and the edge 32e of the opening 32h is formed. It is also possible to have a configuration in which no protrusion is provided.

Furthermore, it is preferable that the edge 32e of the opening 32h has a portion where the skin-side sheet 31 and the non-skin-side sheet 32 are bonded. In the portion where the skin side sheet 31 and the non-skin side sheet 32 are adhered, the shape of the opening portion 32h is easily maintained due to the rigidity of the hardened adhesive between the skin side sheet 31 and the non-skin side sheet 32. Therefore, the shape of the aperture 32h can be easily maintained not only before wearing but also while the wearer is wearing it, thereby improving breathability and making it easier for the wearer etc. to recognize the aperture 32h.

On the other hand, the edge 32e of the opening 32h may have a portion where the skin-side sheet 31 and the non-skin-side sheet 32 are not bonded. The edge 32e of the opening 32h of the non-skin side sheet 32 is a portion where the fiber density tends to be high. Therefore, the edge 32e of the opening 32h of the non-skin-side sheet 32 is excessively hard in the portion where the skin-side sheet 31 and the non-skin-side sheet 32 are not bonded. It is possible to reduce the fear of the product getting wet and improve the texture.

The edge 32e of the opening 32h of the diaper 1 of this embodiment includes both a portion where the skin side sheet 31 and the non-skin side sheet 32 are bonded and a portion where they are not bonded. As described above, in the front waist portion 30 of this embodiment, the skin side sheet 31 and the non-skin side sheet 32 are bonded together via the rubber thread 35 coated with hot melt adhesive. Therefore, when looking at the diaper 1 from the non-skin side, the part where the edge 32e and the rubber thread 35 overlap is the part where the skin-side sheet 31 and the non-skin-side sheet 32 are bonded, and the edge 32e and the rubber thread 35 overlap. The portion where the skin side sheet 31 and the non-skin side sheet 32 do not overlap is a portion where the skin side sheet 31 and the non-skin side sheet 32 are not bonded. From this, as shown in FIG. 6, the edge 32e of the opening 32h of the diaper 1 of this embodiment has a portion where the skin side sheet 31 and the non-skin side sheet 32 are bonded and a portion where the skin side sheet 32 is not bonded. Equipped with.

As described above, the non-skin side sheet 32 of the diaper 1 has the joint portion 32m that joins the fibers together. Regarding this joint 32m, it is preferable that at least one joint 32m is provided at the edge 32e of the opening 32h of the non-skin side sheet 32. In the diaper 1, for example, in FIG. 6, a joint portion 32m is provided at an edge 32e (numerals are omitted in FIG. 6) of the opening portion 32h. In the non-skin side sheet 32, the joint portion 32m has higher rigidity than the portion where the joint portion 32m is not provided, so the provision of the joint portion 32m on the edge 32e prevents the opening of the aperture portion 32h. It becomes easier to maintain the hole shape.

Furthermore, in the non-skin side sheet 32, it is preferable that the total area of the openings 32h provided per unit area is smaller than the total area of the joints 32m. The total area of the apertures 32h refers to the area of one aperture 32h when there is one aperture 32h within a unit area, and refers to the area of one aperture 32h when there is a plurality of apertures 32h within a unit area. represents the sum of the areas of the plurality of openings 32h within a unit area. Similarly, the total area of the joints 32m refers to the area of one joint 32m within a unit area, and when there are multiple joints 32m within a unit area, the total area of the joints 32m within a unit area. Indicates the sum of the areas of Examples of the comparison of the total area include a visual confirmation method and a method of calculating and confirming the arrangement area of the opening portion 32h and the joint portion 32m using an area calculation program. The unit area may be, for example, a 10 mm x 10 mm area, but it can be set arbitrarily. By making the total area of the openings 32h provided per unit area smaller than the total area of the joints 32m, the total area of the openings 32h provided per unit area is greater than the total area of the joints 32m. It is possible to reduce the decrease in the strength of the non-skin side sheet 32 due to the opening, and to reduce the risk of breakage of the non-skin side sheet 32, compared to the case where the holes are made.

When the non-skin side sheet 32 has a plurality of joints 32m, it is preferable that the minimum distance between the centers of the openings 32h is longer than the maximum distance between the centers of the joints 32m in the stretched state. As shown in FIG. 6, the minimum distance between the centers of the openings 32h of the diaper 1 is the length Lh, and the maximum distance between the centers of the joints 32m is the length Lm. The length Lh is longer than the length Lm (Lh>Lm). By making the minimum value (Lh) of the distance between the centers of the apertures 32h longer than the maximum value (Lm) of the distance between the centers of the joint 32m, the minimum value (Lh) of the distance between the centers of the apertures 32h Lh) is shorter than the maximum value (Lm) of the distance between the centers of the joining parts 32m, since the fibers of the non-skin side sheet 32 can be joined in more parts than when the fibers of the non-skin side sheet 32 It becomes easier to maintain the sheet shape of 32.

===Other embodiments===
Although the embodiments of the present invention have been described above, the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to be interpreted as limiting the present invention. Further, the present invention may be modified and improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.

In the above-described embodiment, the opening portion 32h is provided in the non-skin side sheet 32 located closest to the non-skin side, and the through hole is not provided in the skin side sheet 31, but the structure is not limited to this. The non-skin side sheet 32 may be provided with the opening portion 32h, and the skin side sheet 31 may be provided with a through hole (opening portion) passing through in the thickness direction. By providing through holes in the skin side sheet 31 as well, the breathability of the front waist portion 30 can be further improved. In addition, when the skin side sheet 31 is provided with a through hole, it is provided at a position different from the opening 32h of the non-skin side sheet 32 when viewed from the outside (non-skin side) of the diaper 1 (front waist portion 30). It is preferable that the skin-side sheet 31 has a through-hole. With this, when the diaper 1 is viewed from the outside, the color of the skin-side sheet 31 itself can be visually recognized through the aperture 32h of the non-skin-side sheet 32. The difference in color from the color of the sheet 31 itself makes it easier for the wearer to recognize the presence of the apertures 32h.

Furthermore, in the embodiment described above, the color of the skin-side sheet 31 itself is white, and the color of the non-skin-side sheet 32 itself is blue (colored), but the invention is not limited to this. The color of the skin side sheet 31 itself may be colored, and the color of the non-skin side sheet 32 itself may be white.

In the diaper 1 of the above-described embodiment, the colors of the skin-

side sheets

31 and 41 themselves and the non-skin-

side sheets

32 and 42 themselves of the front waist part 30 and the rear waist part 40 are different, and the colors of the

non-skin side sheets

32 and 42 are different. Although the colors of the skin-

side sheets

31, 41 themselves can be visually recognized through the

openings

32h, 42h of the

sheets

32, 42, the present invention is not limited thereto. Regarding either the front waist portion 30 or the rear waist portion 40, the color of the skin-side sheet itself may be different from the color of the non-skin-side sheet itself provided with the openings.

Further, the configuration of the present invention is applicable not only to the

waist portions

30 and 40 but also to the absorbent main body 10. That is, in the backsheet 13 of the absorbent main body, the color of the liquid-impermeable sheet 13a (skin-side sheet) itself may be different from the color of the exterior sheet 13b (non-skin-side sheet) itself. At this time, at least a portion of the outer sheet 13b is a nonwoven fabric that is visible from the outside of the diaper 1, and has an opening (not shown) that penetrates the outer sheet 13b in the thickness direction. Even in such a case, when the diaper 1 is viewed from the outside, the color of the liquid-impermeable sheet 13a itself visible through the apertures can be recognized, so that the color of the outer sheet 13b itself and the liquid-impermeable sheet 13a can be recognized. The difference in color from the color of the adhesive sheet 13a itself makes it easier for the wearer to recognize the existence of the openings.

1 Diapers (absorbent articles, pants-type absorbent articles),
10 absorbent body,
11 absorbent core, 11b core wrap sheet,
12 Top sheet,
13 back seat,
13a liquid-impermeable sheet (skin side sheet),
13b Exterior sheet (non-skin side sheet),
15 leakage prevention wall part, 16 leakage prevention wall elastic member, 17 leg elastic member,
30 front waist part, 30sw side part,
31 Skin side sheet,
32 Non-skin side sheet, 32f folded part,
32h opening,
32m joint,
32e edge, 32s outer part,
35 Thread rubber (waist elastic member),
36 skin sheet,
40 rear waist area, 40b inseam area, 40sw side area,
41 Skin side sheet,
42 Non-skin side sheet, 42f folded part,
42h hole,
45 Thread rubber (waist elastic member),
46 skin sheet, 47 curved elastic member,
50 side joint,
BH waist opening, LH leg opening

Claims

A skin side sheet,
An absorbent article having a non-skin side sheet adjacent to the skin side sheet from the non-skin side,
At least a portion of the non-skin side sheet is visible from the outside of the absorbent article,
The non-skin side sheet is a nonwoven fabric having apertures penetrating in the thickness direction,
An absorbent article characterized in that the color of the non-skin side sheet itself is different from the color of the skin side sheet itself.
The absorbent article according to claim 1,
An absorbent article characterized in that the skin-side sheet is a white nonwoven fabric.
The absorbent article according to claim 1 or 2,
The non-skin side sheet is a long fiber nonwoven fabric containing long fibers,
An absorbent article characterized in that the non-skin side sheet itself is colored.
The absorbent article according to any one of claims 1 to 3,
An absorbent article characterized in that, in the non-skin side sheet, a fiber density at an edge of the aperture is higher than a fiber density at an outer portion adjacent to the edge from the outside.
The absorbent article according to any one of claims 1 to 4,
The non-skin side sheet has a joint portion that joins the fibers,
An absorbent article characterized in that at least one joint is provided at an edge of the aperture.
The absorbent article according to any one of claims 1 to 5,
The absorbent article is characterized in that the non-skin side sheet includes a protrusion protruding toward the skin side or the non-skin side at the edge of the opening.
The absorbent article according to any one of claims 1 to 6,
An absorbent article characterized in that the fibers of the non-skin side sheet have a portion in which the fibers of the non-skin side sheet are not fused together at the edge of the opening.
The absorbent article according to any one of claims 1 to 7,
The non-skin side sheet has a joint portion that joins the fibers,
An absorbent article characterized in that, in the non-skin side sheet, the total area of the openings provided per unit area is smaller than the total area of the joints.
The absorbent article according to any one of claims 1 to 8,
The non-skin side sheet has a plurality of joints that join fibers to each other,
In the extended state,
An absorbent article characterized in that a minimum value of the distance between the centers of the openings is longer than a maximum value of the distance between the centers of the joints.
The absorbent article according to any one of claims 1 to 9,
It has an elastic member that expands and contracts in the expansion and contraction direction,
In the extended state,
An absorbent article characterized in that a length of the opening in the stretching direction is longer than a length of the opening in a direction perpendicular to the stretching direction.
The absorbent article according to any one of claims 1 to 10,
An absorbent article characterized in that the skin-side sheet and the non-skin-side sheet have a bonded portion at an edge of the opening.
The absorbent article according to any one of claims 1 to 10,
An absorbent article characterized in that the skin-side sheet and the non-skin-side sheet have a portion that is not bonded to each other at an edge of the opening.
The absorbent article according to any one of claims 1 to 12,
A rubber thread is provided between the skin side sheet and the non-skin side sheet,
An absorbent article characterized in that the thread rubber has a portion overlapping with the opening when viewed from the non-skin side.
The absorbent article according to claim 13,
An absorbent article characterized in that the color of the rubber thread is different from the color of the non-skin side sheet itself.
The absorbent article according to any one of claims 1 to 14,
Between the skin side sheet and the non-skin side sheet, there is a rubber thread that expands and contracts in the expansion and contraction direction,
An absorbent article characterized in that the length of the opening in a direction perpendicular to the stretching direction is longer than the diameter of the rubber thread.
The absorbent article according to any one of claims 1 to 15,
The absorbent article is characterized in that the skin-side sheet does not have the apertures.