WO2017110695A1

WO2017110695A1 - Absorbent article

Info

Publication number: WO2017110695A1
Application number: PCT/JP2016/087650
Authority: WO
Inventors: 麗子 ▲高▼島; 浩喜森; 紗紀子渡邉
Original assignee: ユニ・チャーム株式会社
Priority date: 2015-12-25
Filing date: 2016-12-16
Publication date: 2017-06-29
Also published as: TWI724081B; JP6055074B1; TW201735886A; CN108472178A; CN108472178B; JP2017113414A

Abstract

A disposable diaper (10) includes: an absorbing core (40a); a core wrap (40b) disposed on the skin-facing side of the absorbing core; and a top sheet (50) disposed on the skin-facing side of the core wrap. The top sheet (50) includes low-weight sections (51) and high-weight sections (52). The low-weight sections and the high-weight sections extend in a longitudinal direction (L) and are alternately arranged in a width direction (W). The core wrap includes colored sections (80) that can be viewed from the skin-facing side of the absorbent article. The colored sections are disposed at a distance from each other in the longitudinal direction and are disposed at a distance from each other in the width direction. The widthwise length (L802) of the colored sections is shorter than the sum of the widthwise length (L512) of the low-weight sections and the widthwise length (L522) of the high-weight sections. The disposable diaper includes first regions (R1) where the colored sections and the low-weight sections overlap each other, and second regions (R2) where the colored sections and the high-weight sections overlap each other.

Description

Absorbent articles

The present invention relates to absorbent articles such as disposable diapers, breast milk pads and sanitary napkins.

An absorbent article having a colored portion visible from the skin facing surface side of the absorbent article is provided (for example, see Patent Document 1). The coloring part of the absorbent article of Patent Document 1 has at least two color tones (for example, a first color tone and a second color tone). The wearer recognizes at least two color tones when viewing the skin facing surface of the absorbent article. Patent Document 1 describes that the wearer obtains a deep perception by the action of two color tones, and the wearer obtains an impression that the function of the absorbent article is enhanced.

JP 2005-512682 A

According to the absorbent article of Patent Document 1, for example, it is conceivable that the wearer receives an impression that the function of the absorbent article is enhanced or an impression that is soft and gentle to the skin. However, the absorptive article of patent documents 1 was not considered about the visual effect to absorption performance.

This invention is made | formed in view of the above-mentioned subject, and provides the absorbent article which a wearer can grasp | ascertain the absorption performance of an absorbent article with the visual effect of the skin opposing surface of an absorbent article. With the goal.

An absorbent article (disposable diaper 10) according to the present disclosure includes an absorbent core (absorbent core 40a) having an absorbent material, a first skin sheet (core wrap 40b) disposed on the skin-facing surface side of the absorbent core, An absorbent article comprising a second skin sheet (top sheet 50) disposed on the skin facing surface side of the first skin sheet, wherein the second skin sheet is a low-weight part (low-weight part). Part 51) and a high basis weight part (high basis weight part 52) having a basis weight higher than that of the low basis weight part, the low basis weight part and the high basis weight part being along the first direction (longitudinal direction L). The first skin sheet is a colored portion that is visible from the skin-facing surface side of the absorbent article, and is alternately arranged in a second direction (width direction W) orthogonal to the first direction. (Colored portion 80), and the colored portion is spaced apart in the first direction. The colored portion is disposed at an interval in the second direction, and a length (L532) of the colored portion in the second direction is equal to a length (L512) of the low weight portion in the second direction. A first region (first region R1) in which the colored portion and the low-weighted portion overlap each other is shorter than the total length of the high-weighted portion in the second direction (L522), and the colored portion And a second region (second region R2) where the high basis weight portion overlaps.

According to the present disclosure, it is possible to provide an absorbent article that allows the wearer to grasp the absorbent performance of the absorbent article due to the visual effect of the skin facing surface of the absorbent article.

It is an expansion | deployment top view of the absorbent article in one Embodiment. FIG. 2 is a cross-sectional view of the absorbent article along the line AA in FIG. 1. It is the enlarged plan view which expanded a part of absorbent article shown in FIG. FIG. 4 is a cross-sectional view taken along line BB in FIG. 3. It is a top view of an absorptive article concerning modification 1. FIG. 6 is a cross-sectional view taken along the line CC in FIG. 5. It is a top view of the absorber of the absorptive article concerning modification 2 to modification 4.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An absorbent core having an absorbent material;
A first skin sheet disposed on the skin facing surface side of the absorbent core;
An absorbent article comprising: a second skin sheet disposed on the skin facing surface side of the first skin sheet;
The second skin sheet has a low basis weight and a high basis weight having a higher basis weight than the low basis weight,
The low weight part and the high weight part each extend along a first direction and are alternately arranged in a second direction orthogonal to the first direction,
The first skin sheet has a plurality of colored portions visible from the skin facing surface side of the absorbent article,
The colored portions are arranged with an interval in the first direction, and are arranged with an interval in the second direction,
The length of the colored portion in the second direction is shorter than the total length of the length of the low weight portion in the second direction and the length of the high weight portion in the second direction,
An absorptive article which has the 1st field where the coloring part and the low fabric weight part overlap, and the 2nd field where the coloring part and the high fabric weight part overlap.

According to such an absorbent article, the wearer visually recognizes the colored portion of the first skin sheet through the second skin sheet. The colored portions are arranged with an interval in the first direction and with an interval in the second direction, and are discontinuously arranged. The colored portion is conspicuous in the first region overlapping with the low-weighted portion, and is not conspicuous in the second region overlapping with the high-weighted portion, and exhibits a visual effect such that the colored portion is visible and hidden by the second skin sheet. By visually recognizing the discontinuously arranged colored portions that are visible and hidden, the wearer receives an impression that the colored portion is an opening and an impression that the body fluid is highly drawn by the opening.

In addition, light and shade depending on the presence or absence of the colored portion occurs between the region where the colored portion is arranged and the region where the colored portion is not arranged. In addition, the area where the low basis weight portion is arranged and the area where the high basis weight portion is arranged are shaded due to the difference in basis weight. On the skin facing surface of the absorbent article, a first area that overlaps with the low weight area and the colored area, a third area that overlaps with the low weight area but does not overlap with the colored area, a second area that overlaps with the high weight area and the colored area, And the 4th field which overlaps with the high basis weight part, but does not overlap with the coloring part is provided. By these four regions, shading occurs on the skin-facing surface of the absorbent article, and the three-dimensional effect of the second skin sheet becomes more conspicuous. The wearer has an impression that the second skin sheet is easy to draw body fluid and has a high absorbency. A wearer can grasp | ascertain the absorption performance of an absorbent article with the visual effect of the skin opposing surface of such an absorbent article.

Such an absorbent article,
The high basis weight portion constitutes a convex portion protruding in the thickness direction of the absorbent article,
It is desirable that the low basis weight portion constitutes a recess that is recessed in the thickness direction.

According to such an absorbent article, the low basis weight part constituting the concave portion is closer to the first skin sheet than the high basis weight part constituting the convex portion, and the colored part is easily visible. Therefore, the difference in appearance between the colored portion overlapping the convex portion and the colored portion overlapping the concave portion becomes remarkable, and the three-dimensional effect of the concave portion and the convex portion can be made conspicuous by the difference in the appearance of the colored portion. A wearer becomes easy to recognize the recessed part which is easy to draw in body fluid, and becomes easier to grasp | ascertain the absorption performance of an absorbent article.

Such an absorbent article,
The length of the low weight portion in the second direction is preferably longer than the interval of the coloring portion in the second direction.

According to such an absorbent article, since the length of the 2nd direction of the low weight part is longer than the space | interval of the 2nd direction of a coloring part, the position of the 1st skin sheet and the 2nd skin sheet shifted | deviated. Even if it is a case, one of the colored portions is disposed so as to overlap the low weight portion. Therefore, the wearer can visually recognize the colored portion that is relatively conspicuous through the low weight portion, and can easily grasp the concave portion of the second skin sheet, and can more easily recognize the absorbent performance of the absorbent article.

Such an absorbent article,
The length of the low weight portion in the second direction is preferably longer than the length of the colored portion in the second direction.

According to such an absorbent article, the entire length of the colored portion in the second direction is arranged in the low weighted portion, so that the outline of the colored portion is easily noticeable in the low weighted portion. A shadow due to the outline of the colored portion is generated in the low basis weight portion, and the second skin sheet becomes more three-dimensional. The wearer feels the second skin sheet more three-dimensionally, and the wearer can more easily grasp the absorption performance.

Such an absorbent article,
The length of the colored portion in the first direction is preferably longer than the length of the colored portion in the second direction.

According to such an absorbent article, the colored portion has a shape extending along the first direction. Moreover, the low basis weight part and the high basis weight part also have a shape extending along the first direction. Since the colored portion has a shape extending in the same direction as the low weighted portion and the high weighted portion, the shade of the colored portion constitutes a shadow along the low weighted portion and the high weighted portion. The three-dimensional effect by the recessed part and convex part of a 2nd skin sheet sheet increases, and it becomes easy for a wearer to grasp | ascertain absorption performance.

Such an absorbent article,
The length of the colored portion in the second direction is preferably shorter than the interval of the colored portion in the second direction.

According to such an absorbent article, on the imaginary line along the width direction, the length where the colored portion is not disposed (region between the colored portions) is the length where the colored portion is disposed (width of the colored portion). Longer than the length in the direction). A visual effect in which the colored skin is disposed and the relatively thin portion is occupied more than the relatively dark portion and the relatively thin portion occupies the range, and the second skin sheet is arranged closer, and the second Visual effects such as high skin sheet bulk. The wearer feels the second skin sheet in a more three-dimensional sense and can easily grasp the absorption performance.

Such an absorbent article,
It is desirable that the orientation direction of the fibers constituting the second skin sheet is along the first direction.

According to such an absorbent article, since the fibers of the second skin sheet are oriented in parallel with the extending direction of the low basis weight portion and the high basis weight portion, the colored portion is contoured with respect to the fiber extending direction. Become a shadow. Therefore, the three-dimensional feeling of the recessed part by a low fabric weight part and the convex part by a high fabric weight part increases more, and a wearer becomes easier to grasp | ascertain absorption performance.

Such an absorbent article,
The plurality of colored portions are preferably arranged in a zigzag pattern in the planar direction of the absorbent article.

According to such an absorbent article, since the plurality of colored portions are arranged in a zigzag pattern, the colored portions are easily noticeable. The wearer can easily recognize each colored portion, and can easily receive an impression that a plurality of openings are provided. By such a visual effect on the skin-facing surface of the absorbent article, the wearer can better understand the absorption performance of the absorbent article.

Such an absorbent article,
It is desirable that the distribution of the fibers constituting the second skin sheet in the low basis weight is not uniform and uneven.

According to such an absorbent article, the appearance of the colored portion through the low weight portion is not uniform and changes. Therefore, the wearer looks as if the colored portion is shaded. The wearer does not see the colored portion as a single pattern or pattern, but the colored portions appear to be scattered non-uniformly, and the colored portion is easily recognized as a pseudo opening.

=== About the absorbent article which concerns on this Embodiment ===
Next, an embodiment of the disposable diaper according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

(1) Overall schematic configuration of disposable diaper FIG. 1 is a developed plan view of a disposable diaper 10 according to the present embodiment. FIG. 2 is a cross-sectional view of the disposable diaper 10 taken along the line AA shown in FIG. The development plan view shown in FIG. 1 extends the leg stretchable part 75 and the elastic member 77 of the leak-proof cuff until no wrinkles are formed on the top sheet 50 and the side sheet 70 as skin sheets constituting the disposable diaper. FIG.

The disposable diaper 10 has a front waistline region 20, a crotch region 25, and a back waistline region 30. The front waistline region 20 is a portion in contact with the wearer's front waistline portion (abdomen portion). Moreover, the back waistline area 30 is a part which contacts a wearer's back waistline part (back part). The crotch region 25 is a region that is located between the front waistline region 20 and the rear waistline region 30 and is provided with a leg opening 35. The leg opening 35 is provided at the outer edge of the disposable diaper, and is a portion that is disposed around the leg of the wearer while the disposable diaper is worn by the wearer. The outer edge is an outer end in the width direction, and the inner edge is an inner end in the width direction.

In this embodiment, a direction from the front waistline region 20 toward the rear waistline region 30 is referred to as a longitudinal direction L, and a direction orthogonal to the longitudinal direction L is referred to as a width direction W. The disposable diaper 10 includes at least an absorbent core 40a, a skin sheet disposed on the skin facing surface side T1 of the absorbent core 40a, and a non-skin surface sheet disposed on the non-skin facing surface side T2 of the absorbent core 40a. Prepare.

The absorbent core 40 a extends over the crotch region 25 and extends to the front waistline region 20 and the rear waistline region 30. The absorbent core 40a can be made of the same material as that of a conventional disposable diaper, and can be appropriately formed using a known member or material such as pulverized pulp or a highly absorbent polymer.

The skin sheet includes a core wrap 40b, a top sheet 50, and a side sheet 70. The core wrap 40b of the present embodiment constitutes a first skin sheet, and the top sheet 50 constitutes a second skin sheet.

The core wrap 40b is a sheet that covers the absorbent core 40a. The core wrap 40b is composed of various fiber nonwoven fabrics or tissues having liquid permeability. The core wrap 40b has the coloring part 80 visible from the skin opposing surface side of an absorbent article. The coloring unit 80 will be described in detail later.

The top sheet 50 is formed of a liquid permeable sheet such as a nonwoven fabric or a woven fabric. The top sheet 50 is a sheet that comes into contact with the skin of the wearer. The top sheet 50 is white, and a nonwoven fabric having a basis weight of 60 g / m 2 or less can be used. The top sheet 50 will be described in detail later.

The side sheet 70 covers the outer edge of the top sheet 50 and extends outward in the width direction from the top sheet 50. The side sheet 70 is composed of a nonwoven fabric. The inner edge of the side sheet 70 is folded outward in the width direction, and an elastic member 77 that expands and contracts in the front-rear direction is disposed between the two side sheets 70. The side seat 70 and the elastic member 77 constitute a leakage cuff.

The non-skin surface sheet has at least a back sheet 60 a and an exterior sheet 60. The back sheet 60a has liquid impermeability and is disposed on the non-skin facing surface side of the absorbent core 40a and the core wrap 40b. The exterior sheet 60 is disposed on the non-skin facing surface side of the back sheet 60a.

The side sheet 70 is provided with a fastening tape 90. The fastening tape 90 extends along the width direction W in the rear waistline region 30 and is fastened to the target portion 95 of the front waistline region 20 to hold the disposable diaper 10 on the wearer's body. The target portion 95 is configured such that the pair of fastening tapes 90 are fixed to each other.

The outer side of the absorbent body 40 in the width direction is provided with a leg stretchable portion 75 that is formed around the leg opening 35 and is stretchable in the longitudinal direction L. A leak-proof cuff is disposed inside the leg stretchable part 75 in the width direction.

(2) Configuration of Top Sheet Next, the configuration of the top sheet 50 will be described in detail with reference to FIGS. 3 and 4. FIG. 3 is an enlarged plan view of a part of the absorbent article shown in FIG. 4 is a cross-sectional view taken along line BB in FIG. The top sheet 50 has a low basis weight portion 51 and a high basis weight portion 52. The low basis weight 51 has a lower basis weight of the nonwoven fabric fibers constituting the top sheet than the high basis weight 52. The low basis weight portion 51 is a portion where the basis weight of the fiber is lower than the average basis weight of the fiber of the top sheet 50, and the high basis weight portion 52 is a portion where the basis weight of the fiber is higher than the average basis weight of the fiber of the top sheet 50. The region in which the low basis weight 51 is arranged is a region where the wearer can easily see the colored portion 80 described later.

The low basis weight 51 and the high basis weight 52 each extend in the longitudinal direction L. The low basis weight parts 51 are arranged with an interval in the width direction, and the high basis weight parts 52 are arranged with an interval in the width direction. The low basis weight portions 51 and the high basis weight portions 52 are alternately arranged in the width direction W. In the present embodiment, the longitudinal direction L is the first direction, and the width direction W is the second direction. In the present embodiment, “extending along the longitudinal direction” may be a configuration having at least a certain range in the longitudinal direction, and includes a configuration extending in the longitudinal direction while being inclined with respect to the longitudinal direction.

Since the core wrap 40b as the first skin sheet has the colored portion 80 visible from the skin facing surface side of the absorbent article, the wearer can attach the colored portion 80 via the top sheet 50 as the second skin sheet. Visually check. For example, if the top sheet 50 does not have the low basis weight part 51 and the high basis weight part 52, the coloring part 80 of the core wrap 40b tends to give the same impression over the entire sheet. Therefore, the wearer can easily recognize the colored portion 80 as a pattern arranged over the entire sheet.

When the top sheet 50 has the low basis weight portion 51 and the high basis weight portion 52, the colored portion 80 hardly gives the same impression over the entire sheet. The high basis weight portion 52 having a relatively high basis weight is less likely to transmit light than the low basis weight portion 51. The low basis weight 51 is easier to transmit light than the high basis weight 52. Therefore, the coloring portion 80 is conspicuous in the first region (region overlapping the low weight portion 51) and is not conspicuous in the second region (region overlapping the high weight portion 52). Therefore, the wearer recognizes the colored portion 80 in the first region relatively darkly, recognizes the colored portion in the second region relatively thinly, or does not recognize the colored portion in the second region. That is, the wearer receives different impressions in the first region and the second region.

The wearer has difficulty in recognizing the colored portion 80 as a pattern arranged over the entire sheet due to the difference in the appearance of part of the colored portion 80. The colored portions 80 that give different impressions as described above are arranged with an interval in the longitudinal direction, which is the first direction, and are arranged with an interval in the width direction, which is the second direction. The coloring part 80 is visible in the first area and the second area, and is visible and hidden by the top sheet. By visually recognizing the plurality of discontinuously arranged colored portions 80 that are visible and hidden, the wearer receives an impression that the colored portion 80 is an opening and an impression that body fluid is highly drawn by the opening.

In addition, the region where the colored portion 80 is arranged and the region where the colored portion 80 is not arranged are shaded depending on the presence or absence of the colored portion 80. That is, on the skin-facing surface of the absorbent article, a first region that overlaps with the low weight part 51 and the coloring part 80, a third region that overlaps with the low weight part 51 but does not overlap with the coloring part 80, a high weight part 52, and coloring. A second region that overlaps the portion 80 and a fourth region that overlaps the high weight portion 52 but does not overlap the coloring portion 80 are provided. By these four regions, shading occurs on the skin facing surface of the absorbent article, and the three-dimensional effect of the top sheet 50 is easily noticeable. The wearer feels the top sheet 50 three-dimensionally, so that the top sheet 50 easily draws body fluid and feels high absorbability. A wearer can grasp | ascertain the absorption performance of an absorbent article with the visual effect of the skin opposing surface of an absorbent article.

The thickness T51 of the low basis weight 51 may be configured to be thinner than the thickness T52 of the high basis weight 52. In detail, the high basis weight part 52 may comprise a convex part protruding in the thickness direction of the absorbent article, and the low basis weight part 51 may constitute a concave part recessed in the thickness direction. The top sheet has a ridge groove structure having a ridge composed of convex portions and a groove composed of concave portions. The density of the low basis weight part 51 which comprises a recessed part is higher than the density of the high basis weight part 52 which comprises a convex part. According to such a configuration, a density difference is generated between the convex portion (high weight portion 52) and the concave portion (low weight portion 51). Due to this density difference, the body fluid quickly moves from the convex portion of the high basis weight portion 52 to the concave portion of the low basis weight portion 51. Therefore, the body fluid can be easily drawn by the concave portion of the top sheet, and the absorbability can be increased.

Also, the skin facing surface of the low basis weight portion 51 constituting the concave portion is closer to the first skin surface sheet than the skin facing surface of the high weight portion 52 constituting the convex portion, and the colored portion 80 is easily visible. Therefore, the colored portion 80 that overlaps the convex portion and the colored portion 80 that overlaps the concave portion are different in appearance, and the three-dimensional effect of the concave portion and the convex portion can be conspicuous due to the difference in the appearance of the colored portion 80. A wearer becomes easy to recognize the recessed part which is easy to draw in body fluid, and becomes easier to grasp | ascertain the absorption performance of an absorbent article.

In addition, the thickness of a convex part and the thickness of a recessed part can be measured as follows. Here, the thickness of the convex portion is the thickness at the top of the convex portion, and the thickness of the concave portion is the thickness of the deepest portion of the concave portion.
(I) Using a cutter knife (manufactured by KOKUYO, standard replacement blade for HA-100B, HA-NB), cut the fiber nonwoven fabric piece for thickness measurement in parallel to the width direction, Make a cutting plane parallel to the direction. Thereafter, the surface of the non-woven fabric piece is placed on a horizontal plane, and a photograph of 25 times the observation cross section is obtained using a Keyence digital microscope VHX-100.
(Ii) The cross-sectional photograph is processed by image analysis software USB digital manufactured by SCARA, which is image processing software, and the image is binarized. At that time, the threshold value is set to 50. For the binarized image, the binary image shape analysis calculation method “fill hole” is selected, and then the target color “white” is selected and processed. Further, the calculation method “hole filling” of the binary image shape analysis is selected, and then the target color “black” is selected and processed. In the processed image, the staple fibers that protrude from the Hakushima portion, which is a group of staple fibers, to the outside of the image are erased, and a modified photograph of the cross section in the width direction without fluff is obtained.
(Iii) In the modified photograph, the distance from the top of the ridge to the horizontal plane where the sample is placed is defined as the thickness of the ridge.
(Iv) A distance from the point of the bottom of the concave portion perpendicular to the horizontal plane to the horizontal plane where the sample is installed is defined as the thickness of the concave portion.

Further, the basis weight of the sheet can be measured by, for example, the following measuring method. The area and weight of the sheet for measuring the basis weight are measured, and the basis weight is calculated based on the weight and the area. The average basis weight of the sheet can be measured by the measurement method. Further, the basis weight of the high basis weight portion and the low basis weight portion can be measured by cutting out only the high basis weight portion and cutting out only the low basis weight portion and using the cut out portion. Further, the boundary between the high weight portion and the low weight portion can be grasped by the difference in the appearance of the colored portion. Specifically, the portion where the colored portion appears dark is the low weight portion, and the portion where the colored portion appears thin is the high weight portion.

The length L512 in the width direction of the low weight portion 51 may be the same as the length L522 in the width direction of the high weight portion 52, or may be different from the length L522 in the width direction of the high weight portion 52. . The length L512 in the width direction of the low weight portion 51 may be longer than the interval D802 in the width direction of the coloring portion 80. Even if it is a case where the position of the 1st skin sheet and the 2nd skin sheet has shifted because the length of the width direction of low weight part 51 is longer than the interval of width direction W of coloring part 80, The low basis weight 51 is also arranged with the colored portion 80 overlapping. Therefore, the shade of the colored portion 80 is provided on the skin-facing surface of the absorbent article, and the stereoscopic effect of the second skin sheet becomes more conspicuous. A wearer becomes easy to grasp a crevice of the 2nd skin sheet, and becomes easy to recognize absorptivity. Further, the length L512 in the width direction of the low weight portion 51 may be longer than the length L802 in the width direction of the coloring portion 80. By arranging the entire length in the width direction of the colored portion 80 in the low weight portion 51, the outline of the colored portion is conspicuous in the low weight portion 51, a shadow is generated in the low weight portion, and the second skin sheet is more three-dimensional. Become. The wearer feels the second skin sheet more three-dimensionally and easily recognizes the absorption performance.

The orientation direction of the fibers of the top sheet 50 may be along the longitudinal direction L which is the first direction. The fiber orientation direction of the top sheet 50 may be along the direction in which the low basis weight 51 extends and along the direction in which the high basis weight 52 extends. The low basis weight portion 51 and the high basis weight portion 52 have a shape extending along the longitudinal direction, and the fibers of the top sheet are arranged in parallel to the low basis weight portion 51 and the high basis weight portion 52. The coloring part 80 becomes a contour and can form a shadow. Therefore, the three-dimensional effect of the recessed part and convex part extended in the orientation direction of a fiber increases, and it becomes easier for a wearer to grasp | ascertain absorption performance.

The density of the fibers of the top sheet 50 may be constant in the thickness direction T, or the density of the top sheet 50 on the non-skin facing surface side may be higher than the density of the top sheet 50 on the skin facing surface side. In the configuration where the density of the non-skin facing surface side T2 of the top sheet 50 is higher than the density of the skin facing surface side T1 of the top sheet 50, body fluid is easily drawn from the skin facing surface side to the non-skin facing surface side. . The body fluid is drawn from the low density region to the high density region, and the larger the density difference, the easier the body fluid is drawn. When the density of the fibers of the top sheet 50 is constant in the thickness direction, the body fluid drawability is increased in a region where the density difference with respect to the core wrap 40b located on the non-skin facing surface side of the top sheet 50 is large.

The distribution of the fibers constituting the top sheet 50 in the low basis weight 51 is not uniform and uneven. That is, the low basis weight 51 has unevenness in the texture. The texture unevenness only needs to be configured so that the appearance of the colored portion 80 viewed through the low weighted portion 51 is different. Due to the unevenness of the fibers in the low basis weight 51, the appearance of the colored portion 80 through the low basis weight 51 is not uniform and changes. Therefore, the wearer does not look at the colored portion 80 as it is, but looks as if the colored portion 80 is shaded. The wearer does not see the colored portion 80 as a single pattern or pattern, but the colored portions 80 appear to be scattered non-uniformly, and the colored portion 80 is easily recognized as a pseudo opening.

(3) Structure of coloring part The coloring part 80 is provided in the skin opposing surface of the core wrap 40b which comprises a 1st skin surface sheet. The colored portion 80 is configured to be visible from the skin facing surface of the disposable diaper, and is visually recognized through the top sheet 50. In a configuration in which a plurality of sheet materials are disposed on the skin facing surface side of the coloring portion 80, such as a configuration in which a sheet material such as an auxiliary sheet is disposed between the top sheet 50 and the core wrap 40b, the coloring portion 80 Is visually recognized through a plurality of sheet materials arranged on the skin facing surface side of the colored portion 80.

The colored portions 80 are discontinuously arranged over the entire core wrap 40b located on the skin facing surface side of the absorbent core. The coloring part 80 should just be arrange | positioned in at least one part of the core wrap 40b. The colored portions 80 are arranged with an interval in the longitudinal direction L and are arranged with an interval in the width direction W. The plurality of colored portions are arranged in a staggered manner in the planar direction of the absorbent article. Since the plurality of colored portions 80 are arranged in a staggered manner, the colored portions 80 are easily noticeable. The wearer can easily recognize the individual colored portions 80 and easily receive an impression that a plurality of openings are provided.

The length L801 in the longitudinal direction of the colored portion 80 is longer than the length L802 in the width direction of the colored portion 80. The coloring part 80 has a shape extending along the first direction. Moreover, the low weight part 51 and the high weight part 52 are also the shapes extended along a 1st direction. Since the coloring portion 80 extends in the same direction as the low weighted portion 51 and the high weighted portion 52, the shadow of the colored portion 80 constitutes a shadow along the low weighted portion 51 and the like. The three-dimensional effect by the recessed part and convex part of a 2nd skin sheet sheet increases, and it becomes easy for a wearer to grasp | ascertain absorption performance. The shape of the coloring part 80 is a rectangle in plan view. The long side of the coloring portion 80 of the present embodiment is along the longitudinal direction L, and the short side is along the width direction W. The coloring part 80 has a shape extending in the longitudinal direction L together with the low weight part 51 and the high weight part 52. The interval D802 in the width direction of the coloring portion 80 is longer than the interval D801 in the longitudinal direction of the coloring portion 80, and is longer than the length L802 in the width direction of the coloring portion 80. Since the distance D802 in the width direction of the colored portion 80 is longer than the distance D801 in the longitudinal direction of the colored portion 80, the colored portion has an impression extending in the longitudinal direction, and the shadow of the colored portion constitutes a shadow along the low weighted portion 51 and the like It is easy to achieve such visual effects. The coloring part 80 is arranged in a broken line shape. In addition, the coloring part 80 may be arrange | positioned at the dashed-dotted line shape or the dashed-two dotted line shape. Further, the shape of the colored portion 80 in plan view is not limited to a rectangle, and may be a square or a circle.

The length L802 in the width direction of the colored portion 80 is shorter than the total length of the length L512 in the width direction of the low weight portion 51 and the length L522 in the width direction of the high weight portion 52. Since the length in the width direction of the colored portion is shorter than the total length, the wearer can easily recognize the colored portion as an opening scattered on the sheet, not as a pattern arranged over the entire sheet. Visual effects like this can be demonstrated. The length L802 in the width direction of the colored portion 80 is shorter than the one-pitch length P51 of the low weight portion. The length L802 in the width direction of the colored portion 80 may be shorter than the length L512 in the width direction of the low weight portion 51, and is preferably 0.1 mm or more and 0.5 mm or less. If the length of the colored part 80 in the width direction is less than 0.1 mm, the colored part 80 is small (thin), and thus it is difficult for the wearer to visually recognize it. If the length of the colored portion 80 in the width direction is longer than 0.5 mm, the colored portion 80 is relatively large (thick), and thus it is difficult to exhibit a visual effect such as a shadow described later.

The length L802 in the width direction of the colored portion 80 may be shorter than the interval D802 in the width direction of the colored portion 80. On the imaginary line along the width direction, the length where the colored portion 80 is not disposed (the region between the colored portions 80) is longer than the length where the colored portion 80 is disposed (the length in the width direction of the colored portion 80). Also long. The wearer feels the top sheet closer because the colored portion 80 is disposed and the colored portion 80 is not disposed and the range occupied by the thin portion is larger than the dark portion. The wearer receives an impression that the top sheet is bulky, feels the three-dimensional effect of the top sheet, and more easily grasps the absorption performance. The length of the colored portion 80 in the width direction may be 1/50 or more of the total length and 1/4 or less of the total length, and more preferably 1/6 or more and the total length of the total length. It is preferable that it is 1/8 or less. When the entire width direction of the coloring portion 80 is accommodated in the row of low weight portions 51, the outline extending in the longitudinal direction of the coloring portion 80 stands out in the row of low weight portions 51. The wearer can easily recognize the colored portion 80 as an opening because the outline of the colored portion 80 is conspicuous, and the wearer has an impression of high body fluid drawability.

The interval D802 in the width direction of the colored portion 80 is different from the interval D512 in the width direction of the low basis weight 51, and is different from the interval D522 in the width direction of the high basis weight 52. On the skin facing surface of the disposable diaper, the first region R1 where the colored portion 80 and the low weight portion 51 overlap, the second region where the colored portion 80 and the high weight portion 52 overlap, and the colored portion 80 are not provided. A third region R3 in which the low basis weight portion 51 is disposed and a fourth region R4 in which the high weight portion 52 is disposed without the coloring portion 80 being provided. In the enlarged plan view of FIG. 3, the first region R1, the second region R2, the third region R3, and the fourth region R4 are shown with different oblique lines.

The wearer does not visually recognize the colored portion 80 in the third region R3 and the fourth region R4, but visually recognizes the colored portion 80 in the first region R1 and the second region R2. In addition, in the first region R1, the wearer visually recognizes the colored portion 80 through the low weighted portion 51, so that the colored portion 80 receives a relatively dark impression. On the other hand, in the second region R2, the wearer visually recognizes the colored portion 80 via the high weighted portion 52, so that the colored portion 80 receives a relatively thin impression. The high basis weight portion 52 having a relatively high basis weight is less likely to transmit light than the low basis weight portion 51. The low basis weight 51 is easier to transmit light than the high basis weight 52. Therefore, the coloring portion 80 is conspicuous in the first region (region overlapping the low weight portion 51) and is not conspicuous in the second region (region overlapping the high weight portion 52). Therefore, the wearer recognizes the colored portion 80 in the first region relatively darkly, recognizes the colored portion in the second region relatively thinly, or does not recognize the colored portion in the second region. That is, the colored portion 80 hardly gives the same impression over the entire sheet, and the wearer receives different impressions in the first region and the second region. The wearer is difficult to recognize the colored portion 80 as a pattern arranged over the entire sheet due to a difference in the appearance of a part of the colored portion 80.

Moreover, the first skin sheet on which the colored portion 80 is provided is preferably a tissue rather than a nonwoven fabric. The tissue has fewer gaps between the fibers than the non-woven fabric, and can show the colored portion 80 more clearly.

The color of the colored portion 80 is not particularly limited, and a primary color, a color lighter than the primary color, and a mixed color of the light color and the primary color can be used. Moreover, the color of the coloring part 80 is suitably set according to the color of a 1st skin surface sheet. For example, when the first skin sheet is other than white, the coloring unit 80 is preferably a color similar to the color of the first skin sheet and darker than the color of the first skin sheet. Since the color of the first skin sheet and the color of the coloring part 80 are similar colors and the color of the coloring part 80 is dark, the shadow by the coloring part 80 is more emphasized and the stereoscopic effect of the second skin sheet is more conspicuous. Can be made. The colored portion 80 can be provided by printing with ink or the like or application of a hot-melt adhesive.

(4) Absorbent article according to modified example Next, an absorbent article according to modified example 1 will be described with reference to FIGS. 5 and 6. In the description of the modification, the same reference numerals are used for the same configurations as those in the embodiment, and the description is omitted. The absorbent article which concerns on a modification is a breast milk pad. 10 A of breast milk pads have the absorption core 40a, the 1st core wrap 40b1 and 2nd core wrap 40b2 as a 1st skin surface sheet, and the top sheet 50 as a 2nd skin surface sheet. The outer edge of the outer sheet of the breast milk pad 10A is folded back inward in the width direction, and the elastic member 78 is disposed between the outer sheets. The expansion / contraction direction of the elastic member 78 is a longitudinal direction L, and the direction orthogonal to the longitudinal direction is a width direction W.

The first core wrap 40b1 covers only the skin facing surface of the absorbent core 40a and does not cover the outer edge of the absorbent core 40a and the non-skin facing surface of the absorbent core 40a. The outer edge of the first core wrap 40b1 is located on the inner side in the width direction than the outer edge of the absorbent core 40a. The second core wrap 40b2 covers the non-skin facing surface of the absorbent core 40a, extends from the non-skin facing surface of the absorbent core to the skin facing surface side, and covers a part of the skin facing surface of the absorbent core 40a. The second core wrap 40b2 covers the outer edge of the first core wrap 40b1.

The coloring part 80 is provided in each of the first core wrap 40b1 and the second core wrap 40b2. The coloring part 80 is disposed over the entire surface of the first core wrap 40b1. The colored portion 80 is not disposed in a certain region extending in the width direction from the outer edge in the developed state of the second core wrap, and is disposed in a region other than the certain region. FIG. 6 shows the colored region R5 where the colored portion is arranged in the second core wrap and the non-colored region R6 where the colored portion is not arranged in the second core wrap with different hatching. 5 and 6, the colored portion is omitted for convenience of drawing, but the colored portion 80 is provided on the skin facing surface of the first core wrap 40b1 and the skin facing surface of the second core wrap 40b2. .

When the wearer visually recognizes the breast milk pad from the non-skin facing surface side, the region X where the colored regions of the first core wrap and the second core wrap overlap and the region Y where the first core wrap and the non-colored region of the second core wrap overlap. And a region Z in which the first core wrap is disposed and the second core wrap is not disposed. FIG. 5 shows the region X, the region Y, and the region Z with different oblique lines. In the region X, since the two colored portions 80 overlap each other, the colored portion 80 exhibits a visual effect such that the colored portion 80 is dark and has a depth. In the region Z, since the colored portion 80 is visually recognized only through the top sheet 50, a visual effect that the colored portion 80 is dark and the depth is small is exhibited. In the region Y, only the colored portion 80 of one layer is arranged, and the colored portion 80 is visually recognized through the top sheet 50 and the second core wrap 40b2, so that the colored portion 80 is thin and the depth is small. Demonstrate. By providing the two-layer first skin sheet in this way, the pattern of how the colored portion 80 looks is increased, and the shading effect due to the change in the appearance of the colored portion 80 can be more exhibited.

Next, the absorbent body of the absorbent article according to Modification 2 to Modification 4 will be described with reference to FIG. FIGS. 7A to 7C are plan views of the absorber. Absorbent articles 10B to 10D according to Modifications 2 to 4 are configured to have a plurality of regions with different arrangement patterns of the colored portions 80. The absorbent bodies according to the modified examples 2 to 4 include the absorbent core 40a and the core wrap 40b, and the core wrap functions as a first skin sheet. In the absorbent articles according to Modifications 2 to 4, the first direction is the longitudinal direction, and the second direction is the width direction. The absorbent bodies according to the modified examples 2 to 4 have the central region CR located at the center in the width direction and the side regions SR located at both sides in the width direction of the central region CR. The arrangement pattern of the colored portion 80 in the central area CR is different from the arrangement pattern of the colored portion 80 in the side area SR.

7A, the length in the longitudinal direction of the colored portion 80 of the absorbent body according to Modification 2 is the same in the central region CR and the side region SR. The interval in the longitudinal direction of the colored portion 80 is the same in the central region CR and the side region SR. The length of the colored portion 80 in the width direction is the same in the central region CR and the side region SR. The central region CR is shorter than the side region SR in the width direction interval of the coloring portion 80. The surface density (area ratio per unit area) of the colored portion 80 in the central region CR is higher than the surface density of the colored portion 80 in the side region SR.

As shown in FIG. 7B, the central region CR is shorter than the side region SR in the longitudinal direction of the colored portion 80 of the absorbent body according to Modification 3. The distance in the longitudinal direction of the colored portion 80 in the central area CR is shorter than the distance in the longitudinal direction of the colored portion 80 in the side area SR. The length of the colored portion 80 in the width direction is the same in the central region CR and the side region SR. The interval in the width direction of the coloring portion 80 is the same in the central region CR and the side region SR. The surface density (area ratio per unit area) of the colored portion 80 in the central region is higher than the surface density of the colored portion 80 in the side region.

As shown in FIG. 7 (c), the length in the longitudinal direction of the colored portion 80 of the absorber according to the modified example 2 is the same in the central region CR and the side region SR. The interval in the longitudinal direction of the colored portion 80 is the same in the central region CR and the side region SR. The central region CR is longer than the lateral region SR in the width direction of the colored portion 80. The interval in the width direction of the coloring portion 80 is the same in the central region CR and the side region SR. The surface density (area ratio per unit area) of the colored portion 80 in the central region CR is higher than the surface density of the colored portion 80 in the side region SR.

In the absorbent articles according to Modification 2, Modification 3 and Modification 4, the surface density (area ratio per unit area) of the colored portion 80 in the central region CR is greater than the surface density of the colored portion 80 in the side region SR. Therefore, it is possible to achieve a visual effect that many openings are formed in the central region CR. The center in the width direction of the absorber is a position facing the excretion opening. A wearer is relieved by recognizing that many openings are arranged in the central region CR and the absorption performance of the central region CR is high.

(5) Other Embodiments In the above-described embodiments, the first direction is the longitudinal direction and the second direction is the width direction. However, the absorbent article according to the present invention includes an embodiment in which the first direction is the width direction and the second direction is the longitudinal direction. In the embodiment in which the first direction is the width direction and the second direction is the longitudinal direction, the direction in which the low weight portion 51 extends, the direction in which the high weight portion 52 extends, the long side of the coloring portion, and the second skin sheet The fiber orientation direction is the width direction.

As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

Note that the entire content of Japanese Patent Application No. 2015-254233 filed on December 25, 2015 is incorporated herein by reference.

The absorbent article which a wearer can grasp | ascertain the absorption performance of an absorbent article by the visual effect of the skin opposing surface of an absorbent article can be provided.

10, 10A, 10B, 10C, 10D: Absorbent article 20: Front waistline area 25: Inseam area 30: Rear waistline area 40: Absorbent body 40a: Absorbent core 40b: Core wrap (first skin sheet)
50: Top sheet (second skin sheet)
51: Low weight part 52: High weight part 60: Exterior sheet 60a: Back sheet 70: Side sheet 80: Colored part 90: Fastening tape 95: Target part L: Longitudinal direction (first direction)
T: thickness direction W: width direction (second direction)
R1: First region R2: Second region

Claims

An absorbent core having an absorbent material;
A first skin sheet disposed on the skin facing surface side of the absorbent core;
An absorbent article comprising: a second skin sheet disposed on the skin facing surface side of the first skin sheet;
The second skin sheet has a low basis weight and a high basis weight having a higher basis weight than the low basis weight,
The low weight part and the high weight part each extend along a first direction and are alternately arranged in a second direction orthogonal to the first direction,
The first skin sheet has a plurality of colored portions visible from the skin facing surface side of the absorbent article,
The colored portions are arranged with an interval in the first direction, and are arranged with an interval in the second direction,
The length of the colored portion in the second direction is shorter than the total length of the length of the low weight portion in the second direction and the length of the high weight portion in the second direction,
An absorptive article which has the 1st field where the coloring part and the low fabric weight part overlap, and the 2nd field where the coloring part and the high fabric weight part overlap.
The high basis weight portion constitutes a convex portion protruding in the thickness direction of the absorbent article,
The absorptive article according to claim 1 in which said low basis weight part constitutes a crevice hollow in said thickness direction.
The absorbent article according to claim 2, wherein a length of the low weight portion in the second direction is longer than an interval between the colored portions in the second direction.
The absorbent article according to claim 2 or 3, wherein a length of the low weight portion in the second direction is longer than a length of the colored portion in the second direction.
The absorbent article according to any one of claims 2 to 4, wherein a length of the colored portion in the first direction is longer than a length of the colored portion in the second direction.
The absorbent article according to any one of claims 2 to 5, wherein a length of the colored portion in the second direction is shorter than an interval of the colored portion in the second direction.
The absorbent article according to any one of claims 2 to 6, wherein an orientation direction of fibers constituting the second skin sheet is along the first direction.
The absorbent article according to any one of claims 1 to 7, wherein the plurality of colored portions are arranged in a staggered manner in a planar direction of the absorbent article.
The absorbent article according to any one of claims 1 to 8, wherein a distribution of fibers constituting the second skin sheet in the low basis weight portion is not uniform and uneven.