CN111150558B

CN111150558B - Absorbent article

Info

Publication number: CN111150558B
Application number: CN201811323709.XA
Authority: CN
Inventors: 穆沁一; 柏木政浩
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2018-11-08
Filing date: 2018-11-08
Publication date: 2022-11-29
Anticipated expiration: 2038-11-08
Also published as: JPWO2020095952A1; CN111150558A; WO2020095952A1

Abstract

The present invention relates to an absorbent article. Provided is an absorbent article having a good tactile sensation to the skin. An absorbent article (1) having an absorbent body (10) and a skin side sheet (2) disposed on the skin side of the absorbent body (10), wherein the absorbent article has a plurality of linear compressed sections (Es) that compress at least the skin side sheet (2) in the thickness direction, and has a 1 st inner region (U1) surrounded by the plurality of linear compressed sections (Es), and a 2 nd inner region (U2) adjacent to the 1 st inner region (U2), and a boundary linear compressed section (Es 12) that is common to the 1 st inner region (U1) and the 2 nd inner region (U2) is provided at the boundary between the 1 st inner region (U1) and the 2 nd inner region (U2), and the boundary linear compressed section (Es 12) is a curved line.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

As absorbent articles used by being fixed to clothing of a wearer, sanitary napkins, pantiliners, absorbent pads, and the like having a liquid-absorbent body and a topsheet are known. For example, patent document 1 discloses an absorbent article in which linear embossings extending in one direction are provided on a top sheet in a corrugated shape while meandering, whereby a liquid such as menstrual blood is smoothly transferred from the top sheet to an absorbent body, and the touch of the skin is improved.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2010-158488

Disclosure of Invention

Problems to be solved by the invention

However, in the absorbent article of patent document 1, the embossments provided on the topsheet extend continuously in one direction, and liquid spreads on the topsheet along the embossments over a long distance in one direction, and the topsheet may be sticky over a wide range, resulting in deterioration of the touch to the skin. Further, since the emboss extending long in one direction contacts the skin of the wearer, the wearer is likely to feel the stiffness due to the emboss, and a satisfactory skin touch may not be achieved.

The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide an absorbent article having a good tactile sensation to the skin.

Means for solving the problems

A main technical means for achieving the above object is an absorbent article having a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, the absorbent article including: an absorbent body; and a skin side sheet disposed on the skin side of the absorbent body in the thickness direction, wherein the absorbent article has a plurality of linear compressed parts obtained by compressing at least the skin side sheet in the thickness direction, the absorbent article has a 1 st inner region surrounded by the plurality of linear compressed parts and a 2 nd inner region adjacent to the 1 st inner region, a boundary linear compressed part common to the 1 st inner region and the 2 nd inner region is provided at a boundary between the 1 st inner region and the 2 nd inner region, and the boundary linear compressed part is curved.

Other features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, an absorbent article having a good tactile sensation on the skin can be provided.

Drawings

Fig. 1 is a plan view of a sanitary napkin 1 viewed from the skin side.

Fig. 2 is a plan view of the sanitary napkin 1 viewed from the non-skin side.

Fig. 3 isbase:Sub>A schematic sectional view of the sanitary napkin 1 shown inbase:Sub>A-base:Sub>A in fig. 1.

Fig. 4 is a view showing a cross-sectional shape of a part of the skin side sheet 2.

Fig. 5 is an enlarged view of the center portion 1B.

Fig. 6 is a diagram for explaining the boundary line-shaped compression part Es12.

Fig. 7 is a view for explaining a partial cross section, which is shown in a view B-B in fig. 5.

Fig. 8 is a view for explaining a partial cross section, which is shown in a view along C-C in fig. 5.

Fig. 9A and 9B are diagrams showing a modification example of the linear compression section Es.

Description of the reference numerals

1: a sanitary napkin (an absorbent article),

1A: front side, 1B: center portion, 1C: rear side, 1W: the wing part is provided with a plurality of wing parts,

2: skin side sheet, 3: an intermediate sheet which is provided with a plurality of grooves,

4: non-skin side sheet, 5: the wing-shaped piece is provided with a plurality of wing pieces,

6: a side panel which is provided with a plurality of side panels,

8: central bonding portion, 9: a wing-bonding portion, wherein the wing-bonding portion,

10: absorber, 11: absorbent core, 12: the covering sheet is a sheet of a plastic material,

21: recess, 22: the convex part is provided with a convex part,

es: linear compression portion, eb: a main body compressing part which is arranged on the main body,

es12: a boundary line-shaped compression part which is provided with a plurality of compression parts,

h: hole portion, N: the non-continuous part is arranged on the outer wall of the casing,

u: inner region, U1: inner region 1, U2: the area on the inner side of the 2 nd,

w: body compression zone

Detailed Description

At least the following matters will be apparent from the description of the present specification and the drawings.

An absorbent article having a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, the absorbent article comprising: an absorbent body; and a skin side sheet disposed on the skin side of the absorbent body in the thickness direction, wherein the absorbent article has a plurality of linear compressed parts obtained by compressing at least the skin side sheet in the thickness direction, the absorbent article has a 1 st inner region surrounded by the plurality of linear compressed parts and a 2 nd inner region adjacent to the 1 st inner region, a boundary linear compressed part common to the 1 st inner region and the 2 nd inner region is provided at a boundary between the 1 st inner region and the 2 nd inner region, and the boundary linear compressed part is curved.

According to such an absorbent article, the boundary line-shaped compressed portion forming the outline of the inner regions U1 and U2 is curved, so that the inner regions U1 and U2 are likely to form shadows when deformed to protrude toward the skin side, and look like a more gentle raised texture when viewed from the skin side. In addition, the amount of liquid (excrement) that can be temporarily held in the linear boundary compression part is larger than in the case where the linear boundary compression part is a straight line. Therefore, the excrement is prevented from spreading widely on the surface of the skin side sheet, and the skin can be made to feel good.

In the absorbent article, it is desirable that the linear boundary compressed portion meanders between one end in the longitudinal direction and the other end in the longitudinal direction.

According to such an absorbent article, a more soft impression can be created by forming a complicated shade in the inner region. Further, since the locus of the boundary-line-shaped compression portion is long, the volume of the liquid (excrement) that can be held in the boundary-line-shaped compression portion is increased, and the diffusion of the excrement is more easily suppressed.

In the absorbent article, it is desirable that the skin-side sheet is provided with, continuously in the longitudinal direction, concave portions that are concave from the skin side in the thickness direction and convex portions that are convex toward the skin side in the thickness direction, and the concave portions and the convex portions are alternately arranged in the width direction.

According to such an absorbent article, the air permeability between the absorbent article and the skin of the wearer can be improved by the concave portions and the convex portions extending in the longitudinal direction. Further, by diffusing a liquid such as excrement along the concave portions and the convex portions, the excrement is less likely to stay in a local region of the skin side sheet, and the skin of the wearer can be inhibited from being inflamed or having a feeling of discomfort.

In the absorbent article, it is desirable that the boundary line-shaped compressed portion has portions that intersect the convex portions and the concave portions, respectively.

According to such an absorbent article, a part of the liquid (excrement) that moves along the concave portions and the convex portions easily moves to the linear boundary compressed portions at the portions intersecting the linear boundary compressed portions, and the excrement is suppressed from spreading in the longitudinal direction. This suppresses the accumulation of excrement in a local region of the skin side sheet and prevents the excrement from excessively spreading in the longitudinal direction, thereby facilitating the achievement of a good skin feel.

In the absorbent article, it is desirable that a distance between a non-skin-side end and a skin-side end of the boundary linear compressed portion in the thickness direction is larger than a distance between a non-skin-side end of the concave portion and a skin-side end of the convex portion in the thickness direction.

According to such an absorbent article, the liquid (excrement) that moves along the concave portions and the convex portions easily moves from the concave portions (convex portions) having a small level difference to the linear compression portions having a large level difference. This makes it easy for liquid (excrement) to move toward the absorbent body through the linear compressed portions, and makes it difficult for the surface of the skin side sheet to wet.

In the absorbent article, it is preferable that the absorbent article includes an intermediate sheet disposed between the absorbent body and the skin side sheet in the thickness direction, the concave portion and the convex portion are provided only in the skin side sheet, and the linear compression portion is provided so as to compress the skin side sheet and the intermediate sheet.

According to such an absorbent article, the intermediate sheet is not compressed by the concave portions and the convex portions, and therefore, the skin-side sheet is prevented from becoming hard at the portions where the concave portions and the convex portions are formed. Further, the linear compressed portion compresses the skin side sheet and the intermediate sheet, and thereby the excrement can be easily diffused from the skin side sheet to the intermediate sheet in the thickness direction. Therefore, the feel of the skin can be improved when the absorbent article is worn.

In this absorbent article, it is desirable that the linear compressed portion disposed at a position facing the linear compressed portion in the 1 st inner region and the linear compressed portion disposed at a position facing the linear compressed portion in the 2 nd inner region have the same shape.

According to such an absorbent article, the linear compressed portions forming the contour have the same shape, and the adjacent inner regions have the same shape, so that the surface of the absorbent article looks like a convex pattern texture. Further, since the adjacent inner regions have the same shape, the inner regions are likely to be deformed convexly and regularly toward the skin in the thickness direction, and the skin touch of the absorbent article can be further improved.

In the absorbent article, it is desirable that the boundary linear compressed portion does not have an intersection with the other linear compressed portions.

According to such an absorbent article, the linear compressed portions do not intersect with each other, and therefore, it is possible to suppress the movement of excrement (liquid) so as to propagate between the plurality of linear compressed portions and spread over a wide range.

In the absorbent article, it is desirable that a discontinuous portion in which the linear compressed portions are discontinuous is provided between two adjacent linear compressed portions, and a compressed portion different from the linear compressed portions is provided in the discontinuous portion.

According to such an absorbent article, the excrement concentrated in the vicinity of the discontinuous section along the linear compressed section can be easily moved toward the absorbent body side in the thickness direction by the compressed section different from the linear compressed section. This makes it easy to suppress the surface of the skin side sheet from being wetted.

In the absorbent article, it is desirable that 50% or more of the total weight of the skin-side sheet be hydrophilic fibers.

According to such an absorbent article, the skin side sheet easily and quickly absorbs moisture in excrement, and a dry skin feel can be easily achieved on the skin side sheet.

In the absorbent article, it is desirable that 100% by weight of the entire skin-side sheet is hydrophilic fibers.

According to such an absorbent article, the moisture absorption performance of the skin-side sheet is improved, and the skin-contact state with respect to the body of the wearer can be easily improved.

In the absorbent article, the skin-side sheet is desirably provided at a position closest to the skin side in the thickness direction.

According to such an absorbent article, even if the skin side sheet having high hydrophilicity is in direct contact with the skin of the wearer when the absorbent article is worn, the skin side sheet hardly irritates the skin of the wearer, and a good skin feel can be achieved. Further, since the skin side sheet made of cotton or the like can be observed on the skin-side surface of the absorbent article, the user can feel a soft feeling and a high-quality feeling with reality.

In the absorbent article, it is desirable that the linear compressed portion has a plurality of dot-shaped compressed portions arranged along the curved line.

According to such an absorbent article, the linear compressed portions are formed by the collection of the dot-shaped compressed portions, so that the skin side sheet and the like are easily prevented from becoming excessively hard as compared with the case where the linear compressed portions are formed by continuous lines, and the skin feel during wearing is easily improved.

In the absorbent article, it is desirable that side sheets covering the absorbent body and the skin side sheet from the skin side in the thickness direction are provided on both sides in the width direction.

According to such an absorbent article, the edges on both sides in the width direction of the skin-side sheet are not exposed, and the edges are prevented from being caught in the skin of the wearer when worn. The side sheet seems to be a skin side sheet with both ends being hemmed, and can give a user a sense of quality by devising geometrically arranged linear compressed portions and the like.

= 1 embodiment = = = = = = = = = = = = = = = = = = = = = = = = = = = = = a 1 st embodiment

Hereinafter, as the absorbent article of the present invention, embodiments will be described by taking a sanitary napkin as an example, but the present invention is not limited to the sanitary napkin, and the absorbent article may be used by being fixed to clothing of a user such as a pantiliner or a incontinence pad.

< basic Structure of sanitary napkin 1 >)

Fig. 1 is a plan view of a sanitary napkin 1 (hereinafter referred to as "sanitary napkin") viewed from the skin side. Fig. 2 is a plan view of the sanitary napkin 1 viewed from the non-skin side. Fig. 3 isbase:Sub>A schematic sectional view of the sanitary napkin 1 at the linebase:Sub>A-base:Sub>A in fig. 1.

The sanitary napkin 1 has a longitudinal direction, a width direction and a thickness direction which are orthogonal to each other. In the longitudinal direction of the sanitary napkin 1, the side that abuts against the lower abdomen of the user is referred to as "front side", and the side that abuts against the buttocks of the user is referred to as "rear side". In the thickness direction of the sanitary napkin 1, the side that contacts the skin of the wearer is referred to as the "skin side", and the opposite side is referred to as the "non-skin side". The X-X line in the figure is the center line in the width direction.

The sanitary napkin 1 has a pair of wing portions 1W extending from the central portion in the longitudinal direction to both outer sides in the width direction. Hereinafter, the portion of the sanitary napkin 1 having the wing portions 1W in the longitudinal direction thereof is referred to as a central portion 1B, the portion thereof located on the front side of the central portion 1B in the longitudinal direction of the sanitary napkin 1 is referred to as a front portion 1A, and the portion thereof located on the rear side of the central portion 1B in the longitudinal direction of the sanitary napkin 1 is referred to as a rear portion 1C.

The sanitary napkin 1 includes a skin side sheet 2, an intermediate sheet 3, an absorbent body 10, a non-skin side sheet 4, and a side sheet 6 at the center in the width direction. The skin side sheet 2, the intermediate sheet 3, the absorbent body 10, and the non-skin side sheet 4 are stacked in this order from the skin side in the thickness direction, and the side sheet 6 is disposed from the end in the width direction of the skin side surface of the skin side sheet 2 to the end in the width direction of the non-skin side surface of the absorbent body 10. That is, the side sheets 6 are arranged to sandwich the

respective members

2, 3, 10 in the thickness direction. The side sheet 6 may be formed of one sheet member as shown in fig. 3, or may have a double structure formed by folding back one sheet member. The skin side sheet 2, the intermediate sheet 3, the absorber 10, the non-skin side sheet 4, and the side sheet 6 are bonded and fixed by an adhesive such as a hot melt adhesive. The adhesive is applied in an arbitrary application pattern in each range of the skin surface side and the non-skin surface side of each member, and can be selected from application patterns such as an Ω pattern, a spiral pattern, and a stripe pattern. Note that in fig. 3 and the like, for convenience, the adhesive is not shown.

The skin side sheet 2 is a liquid-permeable sheet member, and is a cotton sheet. The skin side sheet 2 is a portion that is in direct contact with the skin of the wearer in the worn state. Therefore, by using cotton, which is a hydrophilic natural fiber, for the skin side sheet 2, the feel of the skin felt by the wearer can be further improved. In particular, it is known that the skin of the wearer tends to become sensitive during the physiological period when the sanitary napkin is worn. In this regard, by using cotton for the skin side sheet 2 of the sanitary napkin 1, irritation to the skin of the wearer can be reduced, the fear of causing itching, skin redness, or the like of the skin of the wearer can be easily reduced, or a visually soft impression can be easily given, and the sense of reality is given a high-grade feeling.

In the present embodiment, the surface of the skin side sheet 2 is formed with irregularities along the longitudinal direction. Fig. 4 is a view showing a cross-sectional shape of a part of the skin side sheet 2. As shown in fig. 2, concave portions 21 that are concave from the skin side in the thickness direction and convex portions 22 that are convex toward the skin side in the thickness direction are alternately arranged in the width direction in the skin side sheet 2. The concave portions 21 and the convex portions 22 are continuously provided in the longitudinal direction, and when the sanitary napkin 1 is worn, the convex portions 22 mainly come into contact with the skin of the wearer, the concave portions 21 do not come into contact with the skin of the wearer, and a space is formed between the skin-side sheet 2 and the body (skin) of the wearer. Therefore, air can easily pass through the concave portion 21 in the longitudinal direction, and the air permeability can be improved when the sanitary napkin 1 is worn. Further, since it is easy to move excretory fluid such as menstrual blood in the longitudinal direction along the concave portion 21 (convex portion 22), it is difficult for the excretory fluid to stay at one place, and it is possible to suppress the skin of the wearer from being inflamed or having a feeling of discomfort. The concave portion 21 and the convex portion 22 can be formed by passing the skin side sheet 2 between a pair of gear rollers (not shown) disposed on the skin side and the non-skin side in the thickness direction and rotating around a rotation axis along the longitudinal direction, for example (so-called gear shaping).

The intermediate sheet 3 is a liquid-permeable sheet member, and examples thereof include a hot-air nonwoven fabric and a spunbond nonwoven fabric. The flap 5 and the side sheet 6 are each a hydrophobic sheet member, and examples thereof include a hot air nonwoven fabric and a spunbond nonwoven fabric. The non-skin side sheet 4 is a liquid-impermeable sheet member, and a Polyethylene (PE) resin film or the like can be exemplified. The non-skin side sheet 4 has a planar dimension larger than that of the absorbent body 10, and covers the entire planar surface of the absorbent body 10.

The wing section 1W is formed by portions of both the flap 5 and the non-skin side sheet 4 that protrude outward from both sides in the width direction of the skin side sheet 2 and the like. Further, the sanitary napkin 1 may be configured without the flap portions 1W.

The absorbent body 10 is a member for absorbing excrement and holding it therein. As shown in fig. 3, the absorbent body 10 has an absorbent core 11 and a cover sheet 12 covering the absorbent core 11. The absorbent core 11 is formed by adding a super absorbent polymer (so-called SAP) as a liquid absorbent particulate material to pulp fibers, cellulose absorbent fibers, and the like as liquid absorbent fibers, and molding the mixture into a predetermined shape. The cover sheet 12 is a liquid-permeable sheet, and can be exemplified by tissue paper or the like.

A center adhesive portion 8 to which an adhesive or the like is applied is provided on the non-skin side surface of the sanitary napkin 1 (that is, the non-skin side surface of the non-skin side sheet 4). In fig. 2, 11 rectangular central bonded portions 8 having long sides in the longitudinal direction are arranged at intervals in the width direction in the central bonded portion 8, but the shape, number, and arrangement of the central bonded portions 8 are not limited thereto. The sanitary napkin 1 is fixed to underwear or the like by attaching the central adhesive portion 8 to the skin-side surface of the underwear or the like when the sanitary napkin 1 is used.

Similarly, a flap adhesive portion 9 is provided on the non-skin side surface (non-skin side surface of the non-skin side sheet 4) in the thickness direction of each flap portion 1W. In fig. 2, 4 rectangular flap adhesive portions 9 having long sides in the longitudinal direction are arranged at intervals in the width direction, but the shape, number, and arrangement of the flap adhesive portions 9 are not limited thereto. When the sanitary napkin 1 is used, the flap portions 1W are folded toward the non-skin side, and the flap adhesive portions 9 are adhered to the non-skin side surface of underwear or the like. Thereby, the wing section 1W is fixed to underwear or the like.

< about the linear compression part Es, the main body compression part Eb, the hole part H >)

The sanitary napkin 1 has a plurality of linear compressed portions Es, a plurality of main body compressed portions Eb, and a plurality of holes H. As shown in fig. 1 and 5, when the sanitary napkin 1 is viewed from the skin side, the linear compressed portions Es, the main body compressed portions Eb, and the holes H can be seen. Fig. 5 is an enlarged view of the center portion 1B. Fig. 6 is a diagram for explaining the boundary line-shaped compressed part Es12. Fig. 7 is a view for explaining a partial cross section, which is shown in a view B-B in fig. 5. Fig. 8 is a view for explaining a partial cross section, which is shown by a view along C-C in fig. 5. In fig. 5, both wing portions 1W in the central portion 1B are omitted, and the central portion in the width direction of the sanitary napkin 1 is shown enlarged. In fig. 5, for convenience, the concave portion 21 and the convex portion 22 are partially omitted. For convenience, fig. 7 and 8 show partial cross sections of the skin-side sheet 2, the intermediate sheet 3, and the absorbent body 10 in the respective cross sections, and the non-skin-side sheet 4 and the like are omitted.

The plurality of linear compressed portions Es are disposed substantially over the entire region where the skin side sheet 2 and the intermediate sheet 3 overlap, and are formed by performing compression processing on at least the skin side sheet 2 in the thickness direction. In the present embodiment, as shown in fig. 3 and 7, the single linear compressed portion Es is formed by compressing the skin side sheet 2 and the intermediate sheet 3 in the thickness direction. Specifically, it is a compressed portion having both ends, one end and the other end, and having a predetermined length in the longitudinal direction and the width direction, and is a portion that compresses the skin side sheet 2 and the intermediate sheet 3 without compressing the absorbent body 10. By the compression, the fiber density of the skin side sheet 2 and the fiber density of the intermediate sheet 3 are respectively higher than those of the non-compressed portions. The linear compressed portions Es of the sanitary napkin 1 are formed by a collection of point-like (circular) compressed portions in a linear shape, but are not limited thereto. For example, the linear compression part Es may have a linear compression part. However, by providing the linear compressed parts Es formed by the collection of the point-like (circular) compressed parts as in the sanitary napkin 1, it is possible to reduce the risk of the skin side sheet 2 and the intermediate sheet 3 becoming excessively hard, and to improve the skin feel during wearing, as compared with the case of continuous linear compressed parts.

The plurality of holes H are arranged in a substantially staggered pattern in the center portion in the longitudinal direction and the width direction of the sanitary napkin 1, and as shown in fig. 3 and 7, the holes H are holes that penetrate the skin side sheet 2, the intermediate sheet 3, and the absorbent body 10 from the skin side and are circular in plan view. The holes H of the sanitary napkin 1 are formed by piercing the absorbent body 10 with pins or the like from the skin side surface, and the size of the holes H is larger than the size of one circular compressed portion constituting the linear compressed portion Es in a plan view. The holes H of the sanitary napkin 1 have a depth almost reaching the non-skin side of the absorbent body 10, but the present invention is not limited thereto. The hole H may have a depth extending from the skin side through the skin side sheet 2 and the center sheet 3 to the absorbent body 10.

The body compression portion Eb has a shape that surrounds a region that is considered to be in contact with the vaginal opening of the wearer in a worn state. As shown in fig. 7, the body compressed portion Eb is a compressed portion formed into a desired shape by applying compression processing to the skin side sheet 2, the intermediate sheet 3, and the absorbent body 10 from the thickness direction. By the compression, the fiber density of the skin side sheet 2, the fiber density of the intermediate sheet 3, and the fiber density of the absorbent body 10 are respectively greater than the fiber density of the uncompressed portion.

The linear compression part Es, the main body compression part Eb, and the hole H can be formed as follows. First, the skin side sheet 2 and the intermediate sheet 3 joined together with the adhesive are passed through a nip between a convex roller (not shown) having a plurality of convex portions and an anvil roller (not shown) having a flat surface, and subjected to compression processing from the skin side surface of the skin side sheet 2, thereby forming linear compressed portions Es.

Next, the skin side sheet 2 and the intermediate sheet 3 on which the linear compressed portions Es are formed are superposed on the skin side surface of the absorbent body 10, and bonded together with an adhesive so that the holes H and the main body compressed portions Eb are formed through a roll gap between a convex roll (not shown) having a plurality of convex portions for forming the holes H and the main body compressed portions Eb and an anvil roll (not shown). The convex rollers for forming the hole portions H and the main body compression portions Eb have pin portions having a pin shape sharper than convex portions of the convex rollers for forming the linear compression portions Es for forming the hole portions H, and have convex portions having a projection length longer than that of the convex portions of the convex rollers for forming the linear compression portions Es for forming the main body compression portions Es.

Then, the sanitary napkin 1 can be obtained by laminating the non-skin side sheet 4 and the like on the non-skin side of the absorbent body 10. The sanitary napkin 1 may be formed by cutting each member such as the skin side sheet 2 and the intermediate sheet 3 after the above-described processing using a continuous sheet in which a plurality of respective sheets are continuous. The hole H and the body compression portion Eb may be formed separately without being necessarily formed at the same time by the same roller.

Conventionally, when the sanitary napkin 1 absorbs excrement in a worn state, the skin side sheet 2 using a cotton having high liquid absorbency and moisture retention tends to absorb more excrement, and therefore the following may occur: the excrement diffuses in the layer of the skin side sheet 2, and hardly reaches the intermediate sheet 3 and the absorbent body 10. Therefore, since excrement tends to stay on the skin side surface of the sanitary napkin 1, there is a risk that: the excrement is likely to come into contact with the skin of the wearer, and the wearer is likely to feel uncomfortable, itchy, and red and swollen skin.

In this regard, as shown in fig. 7, in the sanitary napkin 1, the linear compressed portions Es are provided to increase the fiber density of the skin side sheet 2 and the intermediate sheet 3, so that the excrement can be easily absorbed in the linear compressed portions Es by capillary action. That is, since the excrement received in the skin side sheet 2 is easily retained by the linear compressed parts Es, the linear compressed parts Es can suppress the excrement from continuously spreading in the layer of the skin side sheet 2. Further, if the diffusion is suppressed by the linear compressed portions Es, the amount of excrement per unit area increases in the vicinity of the portion where the linear compressed portions Es are provided. Since the excrement having a larger amount per unit area enters the holes H so as to fall into the holes H, the excrement entering the holes H can be absorbed by the absorbent body 10 before being spread over a wider range of the skin side sheet 2 and the intermediate sheet 3. When the holes H are formed by pins or the like, the density of the fibers of the skin-side sheet 2, the center sheet 3, and the absorbent body 10 around the holes H becomes higher, and therefore the holes H easily absorb excrement by capillary action. Thus, even when cotton is used for the skin side sheet 2 in order to improve the tactile sensation to the skin or to give an impression of a visually soft appearance, it is possible to reduce the uncomfortable feeling due to the leakage of excrement from the sanitary napkin 1 or the continuous contact of excrement with the skin caused by the diffusion of excrement along the surface of the skin side sheet 2.

Further, as shown in fig. 7 and the like, the linear compressed parts Es are concave parts, and therefore, it is easy to move excrement to the linear compressed parts Es, and it is easy to diffuse excrement from the skin side sheet 2 to the center sheet 3 in the thickness direction by the higher fiber density of the linear compressed parts Es, and to guide the excrement to the absorbent body 10. Further, it is also conceivable that when the linear compressed sections Es are formed deeper and compressed into the absorbent body 10, the excrement is more easily diffused in the thickness direction. However, if the linear compressed portions Es are deeply compressed until reaching the absorbent body 10, the absorbent body 10 and the sanitary napkin 1 become hard due to the rigidity of the linear compressed portions Es, and there is a possibility that the feel of the skin is reduced when worn or a feeling of discomfort is caused when worn. Therefore, the linear compressed portions Es are preferably compressed only in the skin side sheet 2 and the intermediate sheet 3.

In the sanitary napkin 1 of the present embodiment, a plurality of inner regions U are formed, which are regions surrounded by the plurality of linear compressed portions Es. That is, as shown in fig. 5, the sanitary napkin 1 has a plurality of substantially rhombic inner regions U surrounded on the periphery by four linear compressed parts Es, and has substantially the same shape and substantially the same size.

With the inner region U having the linear compressed portions Es on the four sides, excrement can be easily left inside the inner region U, and the possibility of excrement spreading out in a planar manner on the skin side sheet 2 can be easily reduced. Preferably, the central portions of the plurality of inner regions U each have a convex shape protruding toward the skin. Specifically, as shown in fig. 8, the center portion in the longitudinal direction (and the width direction) of the inner region U formed by compression of the skin side sheet 2 and the intermediate sheet 3 is preferably shaped so as to protrude toward the skin side. When the shape is viewed from the skin side, the wearer is likely to be given a soft-looking impression because the shape looks like a convex texture.

In the present embodiment, the four linear compressed portions Es constituting the outline of the inner region U are curved. That is, the linear compression section Es located at the boundary between the adjacent two inner regions U, U is curved. In fig. 6, a boundary linear compression section Es12 common to the 1 st inner region U1 and the 2 nd inner region U2 is provided at a boundary between the 1 st inner region U1 and the 2 nd inner region U2 adjacent to each other. When the front end of the boundary linear compression section Es12 in the longitudinal direction is defined as an end P1 and the rear end is defined as an end P2, the boundary linear compression section Es12 is arranged so as to draw a curved path between the ends P1 and P2.

The boundary line-shaped compressed parts Es12 forming the outline of the inner region U are curved, so that the inner region U is likely to form a shadow when protruding toward the skin side as shown in fig. 8, and looks like a more gentle raised texture when viewed from the skin side. In addition, since the height of the protruding portion protruding toward the skin is likely to vary depending on the position, the skin-touch state becomes uneven, and the pressure during wearing is dispersed, thereby making it possible to soften the skin feel. In addition, compared to the case where the linear boundary compression part Es12 is straight, the feeling of the linear boundary compression part Es12 is less noticeable when the wearer wears the garment, and therefore, the wearer is less likely to feel uncomfortable. Further, since the boundary linear compression part Es12 is curved, the locus connecting the end P1 and the end P2 becomes long, and thus the amount of excrement temporarily held in the boundary linear compression part Es12 becomes large. Therefore, even when cotton is used for the skin side sheet 2, excessive diffusion of excrement in the longitudinal direction and the width direction can be suppressed, and excrement can be easily absorbed into the absorbent body 10 through the holes H and the like.

As shown in fig. 6, the boundary linear compression section Es12 meanders between the ends P1 and P2. That is, the boundary linear compression section Es12 is a curved line in a zigzag shape having at least a portion projecting to one side and a portion projecting to the other side in a direction orthogonal to the straight line connecting the end P1 and the end P2. By meandering the boundary line-shaped compressed portion Es12 in this manner, a complicated shade can be formed by the inner region U, and a softer impression can be given to the user. Further, since the locus of the linear boundary compression part Es12 is lengthened between the end P1 and the end P2, the volume of excrement held in the linear boundary compression part Es12 can be increased, and the diffusion of excrement can be easily suppressed.

The boundary line-shaped compressed portion Es12 has portions that intersect the concave portions 21 and the convex portions 22 provided on the skin side sheet 2. As described above, the concave portion 21 and the convex portion 22 have a function of moving excrement in the longitudinal direction. However, if excrement can move along the concave portion 21 and the convex portion 22 without limitation, there is a possibility that: the excrement is excessively diffused along the longitudinal direction of the skin side sheet, and the excrement leaks from the abdomen-side end or the back-side end in the longitudinal direction. In contrast, in the present embodiment, the excrement moving along the concave portion 21 and the convex portion 22 moves toward the boundary linear compressed portion Es12 side at the intersection with the boundary linear compressed portion Es12 (linear compressed portion Es). That is, the boundary linear compression sections Es12 inhibit movement of excrement along the concave sections 21 and the convex sections 22, and suppress diffusion of excrement in the longitudinal direction. As is clear from fig. 5, the concave portions 21 and the convex portions 22 intersect with the plurality of linear compressed portions Es, respectively, and the diffusion of excrement in the longitudinal direction is more easily suppressed. Therefore, in the sanitary napkin 1, it is possible to suppress the retention of excrement in a local region of the skin side sheet 2 and also suppress the excessive diffusion of excrement in the longitudinal direction. This makes it easy to achieve a good skin feel.

As shown in fig. 7, the distance between the non-skin-side end and the skin-side end of the boundary linear compressed portion Es12 (linear compressed portion Es) in the thickness direction (i.e., the depth of the linear compressed portion Es) is greater than the distance between the non-skin-side end of the concave portion 21 and the skin-side end of the convex portion 22 in the thickness direction of the sanitary napkin 1 (i.e., the height difference between the irregularities). Therefore, the excrement moving in the longitudinal direction along the recessed portion 21 (and the protruding portion 22) is likely to move from the recessed portion 21 having a small height difference toward the linear compressed portion Es having a large height difference at the portion intersecting with the boundary linear compressed portion Es12 (linear compressed portion Es). This makes it easy to suppress the excrement from excessively spreading in the longitudinal direction along the concave portions 21 (and the convex portions 22), and to move the excrement to the non-skin side (i.e., the absorbent body 10 side) in the thickness direction via the linear compressed portions Es. Therefore, the surface of the skin side sheet 2 is difficult to be wetted.

In the present embodiment, the concave portions 21 and the convex portions 22 are formed only in the skin side sheet 2. That is, the concave portions 21 and the convex portions 22 are not formed in the intermediate sheet 3 laminated with the skin-side sheet 2. The concave portion 21 and the convex portion 22 are provided on the entire skin side sheet. This is because if the skin side sheet 2 and the intermediate sheet 3 are formed to be compressed together, the stiffness of the skin side sheet 2 as a whole becomes high, and there is a possibility that a wearer may feel uncomfortable when wearing the sanitary napkin 1. In the present embodiment, the concave portions 21 and the convex portions 22 are provided only on the skin side sheet 2, and the skin side sheet 2 does not become hard and the wearer does not easily feel a sense of incongruity.

On the other hand, in the present embodiment, the linear compressed portions Es are formed by compressing the skin side sheet 2 and the intermediate sheet 3 as described above. By compressing not only the skin side sheet 2 but also the intermediate sheet 3, excrement can be easily diffused from the skin side sheet 2 to the intermediate sheet 3 in the thickness direction. Further, since the linear compressed portions Es are not compressed to such an extent as to reach the absorbent body 10, the rigidity of the absorbent body 10 is suppressed from being increased by the linear compressed portions Es, and a good tactile sensation is easily achieved.

The linear compressed portions Es constituting the outline of the inner region U are all curved lines having the same shape. That is, the linear compressed portion Es disposed at a position (side) facing the boundary linear compressed portion Es12 in the 1 st inner region U1 and the linear compressed portion Es disposed at a position (side) facing the boundary linear compressed portion Es12 in the 2 nd inner region U2 have the same shape. For example, of the plurality of inner regions U shown in fig. 6, a region adjacent to the 1 st inner region U1 on the opposite side of the 2 nd inner region U2 is referred to as a 3 rd inner region U3, and a linear compression portion Es located at the boundary between the 1 st inner region U1 and the 3 rd inner region U3 (that is, a linear compression portion Es disposed at a position facing the boundary linear compression portion Es12 in the 1 st inner region U1) is referred to as a boundary linear compression portion Es13. Similarly, a region adjacent to the 2 nd inner region U2 on the opposite side of the 1 st inner region U1 is referred to as a 4 th inner region U4, and a linear compression section Es located at the boundary between the 2 nd inner region U2 and the 4 th inner region U4 (that is, a linear compression section Es disposed at a position facing the boundary linear compression section Es12 in the 2 nd inner region U2) is referred to as a boundary linear compression section Es24. At this time, the boundary line-shaped compressed portion Es13 and the boundary line-shaped compressed portion Es24 have the same shape.

The linear compressed parts Es (boundary linear compressed parts Es12, 13, 24) have the same shape, and the adjacent inner side regions U (U1 to U4) also have the same shape, so that a beautiful geometric pattern is formed on the surface of the sanitary napkin 1, and the sanitary napkin looks like a high-class convex-pattern texture. Further, since the adjacent inner regions U, U have the same shape, the respective inner regions U are less likely to be distorted when deformed into a convex shape protruding toward the skin as shown in fig. 8, and the deformation of each other is suppressed from interfering with each other. This makes it easy to form a neat and uniform convex shape, and the overall feel of the sanitary napkin 1 can be further improved.

Further, the two linear compression sections Es, es disposed adjacent to each other do not intersect each other. That is, a certain linear compressed portion Es does not have an intersection with another linear compressed portion Es. For example, in fig. 6, four linear compressed portions Es12, es15, es13, and Es16 are arranged in order in the clockwise direction, thereby forming the 1 st inner region U1. At this time, each of the linear compressed portions Es12, es15, es13, and Es16 does not have an intersection with the other linear compressed portions Es. More specifically, the front end P1 of the linear boundary compression part Es12 in the longitudinal direction and the rear end P6 of the linear boundary compression part Es16 adjacent to the front end in the longitudinal direction of the linear boundary compression part Es12 in the longitudinal direction are disposed at different positions. Hereinafter, a portion where the linear compression parts Es are discontinuous (a portion where the linear compression parts Es do not intersect with each other) between the adjacent linear compression parts Es and Es (for example, between the end P1 of the boundary linear compression part Es12 and the end P6 of the boundary linear compression part Es 16) is also referred to as a discontinuous portion N (see fig. 6).

By providing the discontinuous portions N in which the linear compressed portions Es are discontinuous in this manner, the excrement diffusing along the linear compressed portions Es can be prevented from diffusing to the other adjacent linear compressed portions Es. That is, the excrement can be prevented from moving so as to spread over a wide range in the plurality of linear compressed sections Es.

Further, the point-like compressed portions constituting the linear compressed portions Es are not provided in the discontinuous portion N between the adjacent linear compressed portions Es, but other compressed portions (for example, a main body compressed portion Eb and a hole portion H not shown in fig. 6) different from the linear compressed portions Es may be provided in the discontinuous portion N. As described above, in the sanitary napkin 1, since the excrement moves along the linear compressed parts Es, the excrement is easily collected at both end portions of each linear compressed part Es. Therefore, in the vicinity of the discontinuous portion N, the amount of excrement retained per unit area is increased as compared with other areas, and the surface of the skin side sheet 2 is easily wetted. Therefore, by providing another compressed portion in the discontinuous portion N, the accumulated excrement can be easily moved to the non-skin side (the absorbent body 10 side) in the thickness direction along the other compressed portion. In this way, the volume of excrement per unit area of the discontinuous portion N is reduced, and wetting of the surface of the skin side sheet 2 can be suppressed.

In the present embodiment, although the skin touch feeling when the sanitary napkin 1 is worn is improved by using cotton as the skin side sheet 2, natural fibers such as hemp and silk, regenerated fibers such as rayon and cuprammonium, or a mixed sheet of cotton and a hot-air non-woven fabric may be used in addition to cotton. These fibers are hydrophilic fibers having excellent moisture absorption properties, and are easy to suppress stickiness and stuffiness when they are in direct contact with the skin of the wearer. Further, it is desirable that the skin side sheet 2 contains hydrophilic fibers in an amount of 50% by weight or more of the entire weight of the skin side sheet 2. By using such a sheet member as the skin side sheet 2, moisture in excrement can be rapidly adsorbed, and a dry skin touch can be easily achieved in the skin side sheet 2.

Further, since the moisture absorption property can be improved as the weight% of the hydrophilic fiber is larger, it is more desirable that 100% of the total weight of the skin side sheet 2 of the present embodiment is the hydrophilic fiber. For example, the skin side sheet 2 made of 100% cotton may be used. By using such a skin side sheet 2, the skin-contacting state with respect to the body of the wearer can be further improved.

In the sanitary napkin 1 of the present embodiment, as described above, the skin-side sheet 2 having high hydrophilicity is provided at the position closest to the skin side in the thickness direction. Therefore, even if the skin side sheet 2 comes into direct contact with the skin of the wearer when the sanitary napkin 1 is worn, it is difficult to cause irritation to the skin of the wearer, and a good skin feel can be achieved. Further, since the skin side sheet 2 made of cotton or the like can be observed on the skin-side surface of the sanitary napkin 1, the user can feel a soft feeling and a high-quality feeling unique to cotton.

Further, side sheets 6 are provided on both sides in the width direction of the absorbent body 10 (skin side sheet 2) on the skin side surface of the sanitary napkin 1 (see fig. 1 and 3). In this manner, the side sheet 6 covers both ends in the width direction of the skin side sheet 2 from the skin side, so that the edges (edges) on both sides in the width direction of the skin side sheet 2 and the absorbent body 10 are not exposed, and the edges are prevented from being caught in the skin of the wearer when the sanitary napkin 1 is worn. Further, the side sheets 6 extending in the longitudinal direction are disposed on both sides in the width direction of the skin side sheet 2, and the side sheets 6 look like being hemmed at both end portions of the skin side sheet. Therefore, the side sheet 6 functions like a frame of a painting, and can give the user a sense of high quality with respect to the design of the linear compression sections Es and the main body compression section Eb geometrically arranged on the skin side sheet 2.

< modification example >

As described above, the boundary linear compressed parts Es12 (linear compressed parts Es) provided in the sanitary napkin 1 are meandering curves, but the shape of the curves is not limited to the examples shown in fig. 1, 6, and the like. Fig. 9A and 9B are diagrams showing a modification example of the linear compression section Es. Fig. 9A and 9B are schematic plan views showing a state in which a skin-side surface (surface on the topsheet 2 side) of the sanitary napkin 1 is partially enlarged, and the shape of the linear compressed portions Es is shown by solid lines.

As shown in fig. 9A, the boundary linear compression part Es12 may be a curved line having a portion that is convex only to one side in a direction orthogonal to a straight line (indicated by a broken line in fig. 9A) connecting the one end P1 and the other end P2. That is, the boundary linear compression section Es12 may have at least one curved portion between the end P1 and the end P2. As such a curve, the amount of excrement that can be held is larger than in the case of a straight line, and therefore excessive diffusion of excrement on the surface of the skin side sheet 2 can be suppressed. When the inner regions U1 and U2 protrude toward the skin, shadows are easily formed, and the appearance is soft and raised. Of course, the boundary linear compression part Es12 may be a curve having a larger number of meanders than the case of fig. 6.

In the above example, the inner region U having the outline of the four linear compressed portions Es is formed, but the number of linear compressed portions Es forming the outline of the inner region U may be other than 4. Fig. 9B shows an example in which six linear compressed parts Es form a hexagonal inner region U. In this case, the same effect as described above can be obtained by making the boundary line-shaped compressed portion Es12 of the 1 st inner region U1 and the 2 nd inner region U2 adjacent to each other into a curved line.

= other embodiment = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = misalignment = = = = = = = = = = = = = = = = = = =

While the embodiments of the present invention have been described above, the above embodiments are provided to facilitate understanding of the present invention, and the present invention is not to be interpreted in a limiting manner. It goes without saying that the present invention can be modified and improved without departing from the gist thereof, and the present invention includes equivalents thereof. For example, the following modifications can be made.

In the above-described embodiment, the plurality of linear compression portions Es, the main body compression portion Eb, and the hole portion H are arranged, but not limited thereto. One of them may be disposed, or the number of them may be appropriately changed according to the degree of the skin touch of the sanitary napkin 1 or the amount of excrement. Similarly, the shape and size of the linear compression part Es, the main body compression part Eb, and the hole H can be appropriately changed. The shape and size of the inner region U can be changed as appropriate.

In the above-described embodiment, the absorbent core 11 obtained by molding the liquid absorbent fiber containing the super absorbent polymer is used, but the present invention is not limited thereto. For example, the absorbent core 11 may be a sheet made of only a high-absorbency polymer, or the absorbent core 11 may be made of only liquid-absorbent fibers. Further, the absorbent core 11 alone may be used to form the absorbent body 10 without using a cover sheet.

Claims

1. An absorbent article having a longitudinal direction, a width direction and a thickness direction which are orthogonal to each other,

the absorbent article has:

an absorbent body;

a skin side sheet disposed on the skin side of the absorber in the thickness direction; and

an intermediate sheet disposed between the absorbent body and the skin side sheet in the thickness direction,

the absorbent article is characterized in that,

the absorbent article has a plurality of linear compressed parts obtained by compressing at least the skin side sheet in the thickness direction,

the linear compressed part is obtained by compressing the skin side sheet and the intermediate sheet without compressing the absorbent body,

the absorbent article has a 1 st inner region surrounded by a plurality of linear compressed parts and a 2 nd inner region adjacent to the 1 st inner region,

a boundary linear compression portion common to the 1 st inner region and the 2 nd inner region is provided at a boundary between the 1 st inner region and the 2 nd inner region,

the boundary-line-shaped compressed portion is a curved line,

the skin side sheet is provided with a concave portion that is concave from the skin side in the thickness direction and a convex portion that is convex toward the skin side in the thickness direction continuously in the longitudinal direction,

the concave portions and the convex portions are alternately arranged in the width direction,

the boundary linear compressed portion has a distance between a non-skin-side end and a skin-side end in the thickness direction greater than a distance between a non-skin-side end of the concave portion and a skin-side end of the convex portion in the thickness direction.

2. The absorbent article according to claim 1,

the boundary-line-shaped compressed portion meanders between one end in the longitudinal direction and the other end in the longitudinal direction.

3. The absorbent article according to claim 1 or 2,

the boundary line-shaped compression portion has portions that intersect the convex portions and the concave portions, respectively.

4. The absorbent article according to claim 1 or 2,

the concave portions and the convex portions are provided only on the skin side sheet,

the boundary line-shaped compressed portion is provided so as to compress the skin side sheet and the intermediate sheet.

5. The absorbent article according to claim 1 or 2,

the linear compression portion disposed at a position facing the boundary linear compression portion in the 1 st inner region and the linear compression portion disposed at a position facing the boundary linear compression portion in the 2 nd inner region have the same shape.

6. The absorbent article according to claim 1 or 2,

the boundary linear compression portion does not have an intersection with the other linear compression portions.

7. The absorbent article according to claim 6,

a discontinuous portion in which the linear compressed portions are discontinuous is provided between two adjacent linear compressed portions,

the discontinuous portion is provided with a compressed portion different from the linear compressed portion.

8. The absorbent article according to claim 1 or 2,

the skin side sheet contains hydrophilic fibers in an amount of 50% or more by weight of the whole sheet.

9. The absorbent article according to claim 8,

the skin side sheet is hydrophilic fibers in an amount of 100% by weight of the whole sheet.

10. The absorbent article according to claim 1 or 2,

the skin side sheet is provided at a position closest to the skin side in the thickness direction.

11. The absorbent article according to claim 1 or 2,

the linear compression portion has a plurality of dot-shaped compression portions arranged along the curve.

12. The absorbent article according to claim 1 or 2,

side sheets covering the absorbent and the skin side sheet from the skin side in the thickness direction are provided on both sides in the width direction.