JP2021153752A - Absorbent article - Google Patents

Abstract

To provide an absorbent article facilitating forming marks of an attaching position or a fitting position of the absorbent article without complicating a manufacturing process, and making the marks contribute to a functionality in a worn state.SOLUTION: An absorbent article 1 comprises an absorber 14 including an absorbent core 15 made of an absorbent material, and has a longitudinal direction X and a transverse direction Y corresponding to a front-back direction of a wearer. The absorbent article 1 has a coloring sheet 25 arranged at a non-skin facing surface side of the absorbent core 15. The absorbent core 15 has in a part of the peripheral edge part, low-basis weight parts 21, 22 in which a basis weight of the absorbent material is lower compared to the other parts. The low-basis weight parts are positioned in a central part in the longitudinal direction X or the transverse direction Y in the absorbent core 15. When the absorbent article 1 is visually observed from a skin facing surface, a color of the coloring sheet 25 can be viewed through the low-basis weight parts.SELECTED DRAWING: Figure 3

Description

The present invention relates to absorbent articles such as urine absorbing pads and disposable diapers.

From the viewpoint of attaching or attaching an absorbent article such as a urine absorbing pad or a disposable diaper at an appropriate position, an absorbent article having a visible mark is known. For example, Patent Document 1 includes an absorbent body to which an auxiliary absorber such as an inner pad can be attached, which has a linear mark extending in the entire length in the longitudinal direction at the center in the width direction. However, the absorbent article is described so as to be visible from the wearer side of the absorbent article via the top sheet.

Further, the applicant has previously provided a colored figure on the back surface sheet at a pair of side flap portions extending from both side edges along the longitudinal direction of the absorber to the width direction side, and the colored figure is formed. We proposed an absorbent article in which the skin-facing sheet and the back surface sheet are joined by a hot-melt adhesive having a mesh pattern in the applied area, and the colored figure is visible through the skin-facing sheet (). Patent Document 2).

Patent Document 3 has a colored region visible through the top sheet between the top sheet and the absorbent core, and is liquid permeable and has a color different from the color of the colored region on the fiber material. It has a base sheet having a fine particle adhesion region to which non-absorbable and water-insoluble fine particles are attached, and the fine particle adhesion region is a colored region and a periphery surrounding the colored region when the absorbent article is viewed in the thickness direction. Absorbent articles are described that include areas that overlap both areas.

Patent Document 4 includes a first sheet, a second sheet, and an absorber arranged between them, and the absorber is divided into a plurality of parts in the longitudinal direction of the absorbent article, and the first sheet is provided. Describes an absorbent article in which at least one phase detection mark for alignment with the absorber is attached at a position corresponding to the divided portion of the absorber.

Japanese Unexamined Patent Publication No. 2006-136583 Japanese Unexamined Patent Publication No. 2014-144050 JP-A-2018-0007777 Japanese Unexamined Patent Publication No. 2019-115402

The mounting position or the reference mark of the mounting position is printed on the constituent members of the absorbent article. Equipment such as printing equipment and printing inks are used in the production of such absorbent articles. In addition, it may be necessary to align the printed components when incorporating them into the absorbent article so that the positions of the marks on the absorbent article are at appropriate positions. Further, the mark formed by printing does not contribute to the functionality of the absorbent article except as a reference for the mounting position or the mounting position. That is, the techniques of Patent Documents 1 to 4 do not disclose an absorbent article having a mark that contributes to functionality by preventing the manufacturing process from becoming complicated due to the formation of the mark.

Therefore, the subject of the present invention is that it is possible to easily form a mark of the mounting position or the mounting position of the absorbent article without complicating the manufacturing process, and the mark contributes to the functionality of the absorbent article in the worn state. To provide an absorbent article that can.

The present invention comprises an absorber containing an absorbent core made of an absorbent material, the longitudinal direction corresponding to the anterior-posterior direction extending from the ventral side of the wearer to the dorsal side through the crotch portion, and the lateral direction orthogonal to the longitudinal direction. It is intended to provide an absorbent article having the above.
It is preferable to have a colored sheet arranged on the non-skin facing surface side of the absorbent core.
The absorbent core has a low basis weight portion in a part of the peripheral portion thereof in which the basis weight of the absorbent material is lower than that of the other portions, and the low basis weight portion is the said in the absorbent core. It is preferably located in the central portion in the vertical direction or the horizontal direction.
When viewed from the surface facing the skin, it is preferable that the color of the colored sheet is visible at the portion where the low basis weight portion is located.

According to the present invention, it is possible to easily form a mark of a mounting position or a mounting position of the absorbent article without complicating the manufacturing process of the absorbent article, and the mark is a function of the absorbent article in a worn state. It can contribute to the improvement of sex.

FIG. 1 is a plan view of a urine absorbing pad, which is a preferred embodiment of the absorbent article of the present invention, as viewed from the skin facing surface side. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a perspective view showing an embodiment of the vertically low basis weight portion shown in FIG. FIG. 4 is a perspective view showing another embodiment of the vertical low basis weight portion shown in FIG. FIG. 5 is a plan view showing another embodiment of the absorbent core according to the present invention, and is a view of the absorbent core viewed from the skin facing surface side. FIG. 6 is a perspective view showing a vertically low basis weight portion included in the absorbent core shown in FIG. FIG. 7 is a view corresponding to FIG. 5 showing still another embodiment of the absorbent core according to the present invention. FIG. 8 is a view corresponding to FIG. 6 showing a vertical low basis weight portion shown in FIG. 7. 9 (a) to 9 (d) are views corresponding to FIG. 5 showing variations of the low basis weight portion according to the present invention. FIG. 10 is a schematic plan view showing a urine absorbing pad, which is another embodiment of the absorbent article according to the present invention. FIG. 11 is a schematic plan view showing a disposable diaper, which is another embodiment of the absorbent article of the present invention, together with the urine absorbing pad shown in FIG.

Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings.
FIG. 1 shows a urine absorbing pad 1 which is an embodiment of an absorbent article of the present invention. The urine collecting pad 1 has a vertical direction X that coincides with the front-back direction of the wearer in a used state, and a horizontal direction Y that is orthogonal to the vertical direction X. The "front-back direction of the wearer" is a direction extending from the ventral side of the wearer to the dorsal side via the crotch portion. The urine collecting pad 1 of the present embodiment has a long shape in the vertical direction X. Specifically, the urine collecting pad 1 has a rectangular shape long in the vertical direction X in a plan view. The urine collecting pad 1 of the present embodiment has a shape substantially symmetrical with respect to the vertical center line CLx extending in the vertical direction X by dividing the length of the horizontal direction Y into two equal parts. Further, the urine collecting pad 1 of the present embodiment has a shape substantially symmetrical with respect to the horizontal center line CLi extending in the horizontal direction Y by dividing the length of the vertical direction X into two equal parts.
FIG. 1 shows a state in which the elastic members of each part of the urine absorbing pad 1 are extended to the design dimensions (the same as the dimensions when the elastic members are expanded in a plane with no influence of the elastic members). Has been done.

The urine collecting pad 1 has an inseam M, an anterior portion F and a posterior portion R located in front of and behind the inseam M. The inseam M is a central region when the absorbent article is divided into three regions by dividing the total length in the vertical direction X into three equal parts. The vertical direction X of the present embodiment is a direction extending from the front portion F to the rear portion R via the crotch portion M. In an absorbent article such as a urine absorbing pad 1, the inseam M is arranged to face the wearer's liquid excretion portion when worn, and the anterior portion F is arranged to be closer to the wearer's ventral side than the inseam M when worn. The rear portion R is arranged on the back side of the wearer with respect to the inseam M when worn. The term "when worn" as used herein means a state in which the item is placed in a proper wearing position, and does not include a state in which the item is placed outside the proper wearing position. However, the anteroposterior direction of the urine absorbing pad 1 of the present embodiment is convenient, and the urine absorbing pad 1 may be used in the opposite direction depending on the actual situation of use. For example, when used by a man, the rear portion R of the urine absorbing pad 1 is placed on the ventral side of the wearer from the inseam M when worn, and the front portion F is placed on the wearer's side rather than the inseam M in order to prevent leakage. It may be worn so that it is placed on the back side of the body.

As shown in FIG. 1, the urine absorbing pad 1 includes a front surface sheet 12, a back surface sheet 13, and an absorber 14 interposed between the two sheets 12, 13. In the urine absorbing pad 1, the front surface sheet 12 forms a skin-facing surface, and the back surface sheet 13 forms a non-skin-facing surface. The surface sheet 12 covers the entire surface of the absorber 14 facing the skin. The back surface sheet 13 arranged on the non-skin facing surface side of the absorber 14 covers the entire area of the non-skin facing surface of the absorber 14. The back surface sheet 13 further has an extending portion extending outward in the horizontal direction Y from each of both side edges of the absorber 14 along the vertical direction X, and the extending portion is known as a side sheet 19b described later. It is joined by joining means. Further, the front surface sheet 12 has an extending portion extending outward from each end of the vertical direction X of the absorber, and is known as an extending portion of the back surface sheet 13 in the extending portion. It is joined by the joining means of. Known joining means include, for example, adhesives, heat seals, ultrasonic seals, high frequency seals and the like.

In the present specification, the skin-facing surface is the surface of the absorbent article or its constituent member (for example, the absorber 14) that faces the wearer's skin side when worn, and the non-skin-facing surface is the absorbent article or its constituent members. It is a surface of the component member (for example, the absorber 14) that is directed to the side opposite to the skin side (clothing side) when worn.

The absorber 14 is a main liquid absorbing site and has an absorbent core 15 having a function of absorbing and holding a body fluid such as urine, and core wrap sheets 16a and 16b covering the absorbent core 15. (See Fig. 2). The absorbent core 15 is made of an absorbent material. In the present embodiment, the absorbent core 15 is configured to include the fiber material a and the water-absorbing polymer b as the absorbent material. The absorbent core 15 of the present embodiment has a shape substantially symmetrical with respect to the vertical center line CLx. Further, the absorbent core 15 of the present embodiment has a shape substantially symmetrical with respect to the lateral center line CLi.

The entire surface of the absorbent core 15 is covered with the skin facing surface side core wrap sheet 16a, and the entire non-skin facing surface side core wrap sheet 16b is covered with the non-skin facing surface side core wrap sheet 16b. There is. The skin-facing surface side core wrap sheet 16a has an extending portion extending outward in the lateral direction Y from the absorbent core 15, and the extending portion is rolled down to the non-skin facing surface side to be non-skin. It overlaps with the core wrap sheet 16b on the facing surface side. The core wrap sheets 16a and 16b and the absorbent core 15 are joined to each other by a known joining means such as an adhesive. The skin-facing surface side core wrap sheet 16a may be one in which the extending portion is not wound down on the non-skin-facing surface side. The absorbent core 15 may or may not be coated with a single core wrap sheet.
In FIG. 1, the core wrap sheets 16a and 16b covering the absorbent core 15 are not shown.

In the urine collecting pad 1 of the present embodiment, as shown in FIGS. 1 and 2, a pair of urine collecting pads 1 stand up on both left and right sides along the vertical direction X, at least in the inseam M, toward the wearer's skin side when worn. Leakage-proof cuffs 19 and 19 are provided. The leak-proof cuff 19 stands from the absorbent body 10 side as a base end so as to form a free end on the wearer's skin side, and an elastic member 19a extends along the vertical direction X at the free end. It is arranged in. The elastic member 19a extends at least the entire length of the crotch portion M in the vertical direction X, and further extends to the portions of the front portion F and the rear portion R toward the crotch portion M in the present embodiment.
Each leakage-proof cuff 19 is configured to include, in addition to the elastic member 19a, one side sheet 19b forming the base end and the free end, and the side sheet 19b is as shown in FIG. In the lateral direction Y, the absorbent body 10 extends outward and is joined to the back sheet 13.

The urine absorbing pad 1 has a colored sheet 25 arranged on the non-skin facing surface side of the absorbent core 15. In the present embodiment, the colored sheet 25 is provided as the core wrap sheet 16b on the non-skin facing surface side. The colored sheet 25 is colored by containing fibers in which the coloring material is kneaded or by being colored by printing. The colored sheet 25 of the present embodiment has a patternless color on both sides of the colored sheet 25. Instead of this, the colored sheet 25 may have the entire surface of one surface colored and a single color without a pattern.

The absorbent core 15 has low basis weight portions 21 and 22 having a basis weight of the absorbent material lower than that of the other portions in a part of the peripheral portion thereof (see FIG. 1). The absorbent core 15 of the present embodiment is located at both ends of the vertical direction X and the low basis weight portions 21 (hereinafter, also referred to as “vertical low basis weight portions”) and both side edges along the vertical direction X. It has a low basis weight section 22 (hereinafter, also referred to as “horizontal low basis weight section”). Both ends of the absorbent core 15 in the vertical direction X and both side edges along the vertical direction X are portions included in the peripheral edge of the absorbent core 15 described later.
In the present embodiment, the low basis weight portions 21 and 22 are formed so as to be in contact with the peripheral edge e of the absorbent core 15. That is, in a plan view, a part of the contour of the low basis weight portions 21 and 22 overlaps with a part of the peripheral edge e forming the contour of the absorbent core 15. The low basis weight portions 21 and 22 may be formed on the peripheral edge portion of the absorbent core 15 and may be formed at a position separated from the peripheral edge e of the absorbent core 15 as described later. The peripheral edge portion of the absorbent core 15 is a region within the peripheral edge e including the peripheral edge e forming the contour of the absorbent core 15, and the distance from the peripheral edge e is within 25 mm.

The low basis weight portions 21 and 22 are located at the center of the absorbent core 15 in the vertical direction X or the horizontal direction Y. The central portion of the vertical direction X is the central region when the total length of the vertical X of the absorbent core 15 is divided into three equal parts. The central portion in the lateral direction Y is the central region when the total length of the lateral Y of the absorbent core 15 is divided into three equal parts.
In the present embodiment, the vertical low basis weight portion 21 is arranged at a position overlapping the vertical center line CLx, and the horizontal low basis weight portion 22 is arranged at a position overlapping the horizontal center line CLy (see FIG. 1). .. Specifically, the vertical low basis weight portion 21 overlaps the vertical center line CLx so that the vertical center line CLx divides the length of the vertical low basis weight portion 21 in the horizontal direction Y into two equal parts. The horizontal low basis weight portion 22 overlaps with the horizontal center line CLy so that the horizontal center line CLy divides the length of the horizontal low basis weight portion 22 in the vertical direction X into two equal parts.

The urine absorbing pad 1 of the present embodiment is arranged and used on the skin-facing surface side of another absorbent article (for example, a disposable diaper) different from the urine absorbing pad 1. That is, the urine absorbing pad 1 is used as an inner, and other absorbent articles (disposable diapers) are used as an outer.
When the urine absorbing pad 1 of the present embodiment is visually observed from the surface facing the skin, the color of the colored sheet 25 can be visually recognized at the portion where the low basis weight portions 21 and 22 are located. For example, as shown in FIG. 1, when the urine absorbing pad 1 is viewed in a plan view, the color of the colored sheet 25, which is the core wrap sheet 16b on the non-skin facing surface side, is displayed in the portion where the vertical low basis weight portion 21 is located. It can be visually observed through the surface sheet 12. Further, when the urine collecting pad 1 is viewed in a plan view, the color of the colored sheet 25 can be visually observed through the surface sheet 12 and the side sheet 19b at the portion where the lateral low basis weight portion 22 is located. Since the vertical low basis weight portion 21 and the horizontal low basis weight portion 22 are located at the central portion of the absorbent core 15 in the vertical direction X and the central portion in the horizontal direction Y, they shall be used as markers to indicate these central portions. Can be done. Based on this mark, for example, when attaching the urine absorbing pad 1, the position of the excretory portion of the wearer and the position of the absorbent core 15 can be easily aligned. That is, the urine collecting pad 1 can be easily attached to an appropriate position. Further, since the mark is composed of the low basis weight portions 21 and 22 located at the central portion in the vertical direction X or the central portion in the horizontal direction Y, the absorbent core 15 is formed starting from the low basis weight portions 21 and 22. It can be curved in the vertical direction X or the horizontal direction Y. As a result, the urine absorbing pad 1 can be fitted to the wearer's skin well, so that the urine absorbing pad 1 is excellent in the effect of suppressing leakage. As described above, the low basis weight portions 21 and 22 function as a mark for positioning the urine absorbing pad 1, and can improve the functionality such as the fit and the leak suppressing effect of the urine absorbing pad 1.

The colored sheet 25 in the present embodiment was a core wrap sheet 16b arranged on the non-skin facing surface side of the absorbent core 15, but the colored sheet 25 is on the non-skin facing surface side of the absorbent core 15. Any sheet member to be arranged may be used. For example, the colored sheet 25 may be a back sheet 13.

From the viewpoint of making the color of the colored sheet 25 more visible, the color difference between the portion where the low basis weight portions 21 and 22 are located and the other portion on the skin-facing surface of the urine absorbing pad 1 is preferably 4 or more. , More preferably 5 or more, still preferably 10 or less, more preferably 9 or less, and preferably 4 or more and 10 or less, more preferably 5 or more and 9 or less. In the present specification, the color difference is "L ^* a ^* b ^* color difference in the color system" and can be measured by the following method. Such a color difference means that the larger the color difference, the more the color difference can be recognized.

[Measurement method of color difference (ΔE ^{* value)]}
As the color difference meter, a simple spectroscopic color difference meter NF333 (trade name) manufactured by Nippon Denshoku Kogyo Co., Ltd. can be used. ^{In "L *} a ^* b ^* color system" specified in JIS Z 8729 ^{, L *} indicates brightness, a ^* and b ^* indicate color direction, and a ^* indicates approximately red direction, -a ^*. Indicates a substantially green direction, b ^* indicates a substantially yellow direction, and −b ^* indicates a substantially blue direction. Then, ΔE ^* is a value obtained by the following equation (1).
ΔE ^* = [(ΔL ^* ) ² + (Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 ... (1)
ΔL ^* , Δa ^* , and Δb ^* are the differences between the two colors, L ^* value, a ^* value, and b ^* value, respectively. For example, ΔL ^* is calculated by ^{ΔL *} = L ^* _2- L ^* _1.
In this measurement method, a stapler type ND120 sensor having a diameter of 8 mm is attached for measurement.
In the measurement, the urine absorbing pad is placed on a horizontal surface so that the skin facing surface faces upward in the vertical direction without wrinkles or bends, and the skin facing surface of the urine absorbing pad, specifically, the surface. The tip of the sensor is on the skin-facing surface of the sheet 12 or the skin-facing surface of the side sheet 19b, where the low basis weight portion is located in the plan view of the urine absorbing pad, and the other portion on the skin-facing surface side. Press the part to measure. This measurement is performed at any three points, and the average is used as the measured value.

From the viewpoint of making the color of the colored sheet 25 more visible, the color of the colored sheet 25 is in ^{the L *} a ^* b ^* color system ^{, provided that the color difference (ΔE *} ) is within the above range. It is preferable that each value is within the following range.
^{The L *} value of the colored sheet 25 is preferably 88 or more and 92 or less, and more preferably 89 or more and 91 or less.
^{The a *} value of the colored sheet 25 is preferably -7 or more and 2 or less, and more preferably -6 or more and 1 or less.
^{The b *} value of the colored sheet 25 is preferably -4 or more and 3 or less, and more preferably -3 or more and 2 or less.

In the present specification, when a component of an absorbent article such as a colored sheet 25 or an absorbent core 15 is to be measured, the other components are peeled off by using a cold spray or the like, and the structure of the object to be measured is removed from the absorbent article. The member will be taken out.

From the same viewpoint as above, it is preferable that the skin-facing surface of the surface sheet 12 or the skin-facing surface of the side sheet 19b is white. The "white", ^{L *} value in the L ^* a ^* b ^* color system is 88 to 92, ^{a *} value is -2 to 2, ^{b *} value is -2 to 2.

The preferred configuration of the low basis weight portions 21 and 22 will be described in detail. The following description relates to the configuration of the vertically low basis weight portion 21, but can also be applied to the horizontally low basis weight portion 22 unless otherwise specified.
As shown in FIG. 3, the vertical low basis weight portion 21 may be a portion in which an absorbent material does not exist. The “part where the absorbent material does not exist” is a portion where the absorbent material does not substantially exist, and more specifically, it means that the basis weight of the absorbent material is 3 g / m ² or less. That is, the vertical low basis weight portion 21 may be a penetrating portion penetrating the absorbent core 15. Of the low basis weight portions 21, those in which no absorbent material is present are also referred to as “missing portions”. In this case, since there is no absorbent material such as a fiber material in the vertical low basis weight portion 21 (missing portion), the absorbent core is compared with the form in which the absorbent material is present, that is, the form having no missing portion. The fit of 15 can be further improved.
From the viewpoint of further improving the color visibility of the colored sheet 25, when the low basis weight portion 21 is a missing portion, the skin facing surface side core wrap sheet 16a and the non-skin facing surface side core in the low basis weight portion 21 It is preferable that the wrap sheet 16b is joined (not shown). For such joining, the above-mentioned known joining means can be used.

As shown in FIG. 4, the vertically low basis weight portion 21 may be a thin-walled portion having a lower basis weight and a smaller thickness than the other portions of the absorbent core 15. In this case, the color of the colored sheet 25 can be visually recognized through the vertically low basis weight portion 21 and the surface sheet 12 in the portion where the vertically low basis weight portion 21 which is a thin wall portion is located.
From the viewpoint of further improving the color visibility of the colored sheet 25, when the low basis weight portion 21 is a thin wall portion, the thickness of the low basis weight portion 21 is preferably within the following range.
The thickness D2 of the low basis weight portion 21 (see FIG. 4) is preferably more than 0%, more preferably 10% or more, and preferably 50% or less, more preferably 50% or less, based on the thickness D1 of the absorbent core 15. It is 40% or less, preferably more than 0% and 50% or less, and more preferably 0% or more and 40% or less.
The thickness D2 (see FIG. 4) of the low basis weight portion 21 is preferably more than 0 mm, more preferably 0.5 mm or more, preferably 6 mm or less, more preferably 5 mm or less, and preferably 0 mm or more and 6 mm. Hereinafter, it is more preferably more than 0 mm and 5 mm or less.
The thickness D1 of the absorbent core 15 is the thickness of a portion of the absorbent core 15 other than the low basis weight portion 21.

The thickness D1 of the absorbent core 15 and the thickness D2 of the low basis weight portion 21 are each measured using a non-contact laser displacement meter (for example, KEYENCE laser head LK-2100, displacement meter RV 3-55 R). .. The thickness of the absorbent core is measured under a load of ^{0.5 g / cm 2 on which} the absorbent core is placed so as not to be wrinkled or bent. The measurement is performed 5 times, and the average value is taken as the thickness of the absorbent core 15 or the thickness of the low basis weight portion 21.

From the same viewpoint as above, when the low basis weight portion 21 is a thin wall portion, the basis weight of the low basis weight portion 21 is preferably within the following range.
The basis weight of the low basis weight portion 21 is preferably more than 0%, more preferably 5% or more, and preferably 20% or less with respect to the basis weight of the portion other than the low basis weight portion 21 of the absorbent core 15. , More preferably 15% or less, preferably 0% or more and 20% or less, and more preferably 0% or more and 15% or less.
The basis weight of the low basis weight portion 21 is preferably ^{more than 3 g / m 2} , more preferably 10 g / m ² or more, preferably 50 g / m ² or less, more preferably 40 g / m ² or less, and also. It is preferably more than 3 g / m ^{2 and} 50 g / m ² or less, and more preferably 0 g / m ² or more and 40 g / m ² or less.

From the viewpoint of further improving the color visibility of the colored sheet 25, the basis weight of the absorbent core 15 other than the low basis weight portion 21 is preferably 20 g / m ² or more, more preferably 25 g / m ² or more. It is preferably 100 g / m ² or less, preferably 20 g / m ² or more and 100 g / m ² or less, and more preferably 25 g / m ² or more and 100 g / m ² or less. When the basis weight in the portion other than the low basis weight portion 21 of the absorbent core 15 is within the above range, the color visibility can be improved particularly when the colored sheet 25 is used for the back surface sheet 13. preferable. Such a range of basis weight can be applied regardless of whether the low basis weight portion 21 is a missing portion or a thin portion.

From the viewpoint of further improving the color visibility of the colored sheet 25, the dimensions of the low basis weight portion 21 are preferably within the following ranges. Such a range of dimensions can be applied regardless of whether the low basis weight portion 21 is a missing portion or a thin-walled portion.
Area per the low basis weight portion 21 in plan view is preferably 500 mm ² or more, more preferably 900 mm ² or more, and preferably 5000 mm ² or less, more preferably 4050mm ² or less, and preferably 500 mm ² or more 5000 mm ² or less, more preferably 900 mm ² or more 4050Mm ² or less.
The length L1 (see FIG. 3) of the vertical low basis weight portion 21 in the vertical direction X is preferably 50 mm or more, more preferably 60 mm or more, and preferably 100 mm or less, more preferably 90 mm or less, and more preferably. Is 50 mm or more and 100 mm or less, more preferably 60 mm or more and 90 mm or less.
The length L2 (see FIG. 3) of the vertical low basis weight portion 21 in the lateral direction Y is preferably 10 mm or more, more preferably 15 mm or more, and preferably 50 mm or less, more preferably 45 mm or less, and more preferably. Is 10 mm or more and 50 mm or less, more preferably 15 mm or more and 45 mm or less.

Regarding the above-mentioned dimensions, when the low basis weight portion is the horizontal low basis weight portion 22, the “length of the vertical low basis weight portion 21 in the vertical direction X” is the “length of the horizontal low basis weight portion 22 in the horizontal direction Y”. , And "the length of the vertical low basis weight portion 21 in the horizontal direction Y" shall be read as "the length of the horizontal low basis weight portion 22 in the vertical direction X".

5 to 11 show other embodiments of the present invention. Embodiments to be described later will mainly be described with components different from those of the embodiments (first embodiment) shown in FIGS. 1 to 4, and similar components will be designated by the same reference numerals and description thereof will be omitted. The description of the first embodiment is appropriately applied to the components not particularly described.

The plan view shape of the low basis weight portion 21 can be any shape, for example, in addition to a quadrangle such as a rectangle as in the first embodiment and a triangle as described in the second embodiment described later, a pentagon or the like. It may be a polygon such as a hexagon, a star shape, a circle shape, an oval shape, an oval shape, a heart shape, or the like.
FIG. 5 shows the absorbent core 15a in the second embodiment. The low basis weight portions 21a and 22a of the present embodiment have a triangular shape in a plan view. One of the corners of the triangle of the vertical low basis weight portion 21a overlaps with the vertical center line CLx. Further, one of the corners of the triangle of the horizontal low basis weight portion 22a overlaps with the horizontal center line CLi.

As in the present embodiment, the plan-view shapes of the low basis weight portions 21a and 22a have a plurality of corners, and any of the plurality of corners in the low basis weight portions 21a and 22a is the vertical center line CLx. Alternatively, it is preferable that it overlaps with the horizontal center line CLi. With such a configuration, the vertical center line CLx or the horizontal center line CLy of the absorbent core 15a can be more easily grasped, and the urine collecting pad 1 can be attached to a more appropriate position. The plan view shape having a plurality of angles includes a polygon shape of a triangle or more, an arrow shape, a star shape, a fan shape including a curved portion and a straight portion in the contour and a constricted portion, a tear shape, and a heart. The shape and the like can be mentioned.

The vertically low basis weight portion 21a and the horizontally low basis weight portion 22a in the second embodiment are triangles having the same shape and the same size in a plan view, but the orientations at the peripheral portions of the absorbent core 15a are different from each other. FIG. 6 shows a perspective view of a portion of the absorber 14a according to the second embodiment in which the vertically low basis weight portion 21a is formed. In the present embodiment, in a plan view, one of the vertices of the triangle of the vertically low basis weight portion 21a overlaps with the peripheral edge e of the absorbent core 15a. On the other hand, in the horizontal low basis weight portion 22a, one of the triangular sides of the horizontal low basis weight portion 22a overlaps with the peripheral edge e of the absorbent core 15a in a plan view. As described above, when the plan-view shapes of the low basis weight portions 21a and 22 have a plurality of angles, the angle overlapping the vertical center line CLx or the horizontal center line CLy among the plurality of angles is the absorptive core 15a. It may or may not overlap with the peripheral edge e.

FIG. 7 shows the absorbent core 15f in the third embodiment. Further, FIG. 8 shows a perspective view of a portion of the absorber 14f including the absorbent core 15f of the present embodiment in which the vertically low basis weight portion 21j is formed. The vertical low basis weight portion 21j of the present embodiment has a triangular plan view shape as in the second embodiment, and one of the corners of the triangle overlaps with the vertical center line CLx. The laterally low basis weight portion 22j of the present embodiment also has a triangular plan view shape, and one of the corners of the triangle overlaps with the lateral center line CLi.
In the absorbent core 15f of the third embodiment, as shown in FIG. 7, each of the vertical low basis weight portion 21j and the horizontal low basis weight portion 22j is formed so as to be separated from the peripheral edge e of the absorbent core 15f. There is. Specifically, the vertical low basis weight portion 21j is formed on the inner side of the vertical direction X at a distance from both end edges e of the vertical direction X in the peripheral edge e of the absorbent core 15f. The horizontal low basis weight portion 22j is formed on the inner side in the horizontal direction Y, away from both side edges along the vertical direction X in the peripheral edge e of the absorbent core 15f.

As in the present embodiment, the low basis weight portion may have an interval L5 between the low basis weight portion and the peripheral edge e of the absorbent core 15f.
In this case, from the viewpoint of achieving both the shape retention of the absorbent core 15f and the functionality as a mark of the low basis weight portion, the low basis weight portion has a distance L5 from the peripheral edge e of the absorbent core 15f [Fig. 7] is preferably 10 mm or more, more preferably 15 mm or more, preferably 30 mm or less, more preferably 25 mm or less, and preferably 10 mm or more and 30 mm or less, more preferably 15 mm or more and 25 mm or less.
The interval L5 is the shortest distance between the low basis weight portion and the peripheral edge e of the absorbent core 15.

9 (a) to 9 (d) are plan views showing the low basis weight portions 21 and 22, respectively, of the fourth to seventh embodiments.
As shown in FIG. 9A, the absorbent core 15b in the fourth embodiment has a vertical low basis weight portion 21b formed so as to be in contact with both ends of the peripheral edge e of the absorbent core 15b in the vertical direction X. The peripheral edge e has a laterally low basis weight portion 22b formed apart from both side edges along the vertical direction X. As in the present embodiment, the absorbent core 15b may have a low basis weight portion in contact with the peripheral edge e of the absorbent core 15b and a low basis weight portion separated from the peripheral edge e. Instead, the absorbent core 15 may have a horizontal low basis weight portion in contact with the peripheral edge e of the absorbent core and a vertical low basis weight portion separated from the peripheral edge e.
Further, as in the present embodiment, the vertically low basis weight portion 21b and the horizontally low basis weight portion 22b may have different planar views.

In the above-described embodiment, the absorbent core 15 has a vertical low basis weight portion 21 and a horizontal low basis weight portion 22, but has only one of these low basis weight portions. There may be. That is, the absorbent core 15 may have only the vertical low basis weight portion 21 or only the horizontal low basis weight portion 22.
For example, the absorbent cores 15c, 15d, 15e in the fifth to seventh embodiments shown in FIGS. 9 (b) to 9 (d) have only the laterally low basis weight portion 22.

In the embodiments shown in FIGS. 9 (b) to 9 (d), the absorbent cores 15c, 15d, 15e have a plurality of laterally low basis weight portions 22. By having a plurality of low basis weight portions in this way, the flexibility of the absorbent core is improved, so that the fit can be further improved.
When a plurality of horizontally low basis weight portions are provided along the vertical direction X as in these embodiments shown in FIGS. 9 (b) to 9 (d), the appearance of the plurality of horizontally low basis weight portions is the same. They may be present and their appearances may be different from each other.
For example, the plan-view shapes of the plurality of laterally low basis weight portions may be the same or different. Further, the sizes, that is, the dimensions of the plurality of laterally low basis weight portions may be the same or different.

As shown in FIG. 9B, the absorbent core 15c according to the fifth embodiment has a plurality of laterally low basis weight portions on both side edges along the vertical direction X among the peripheral edges of the absorbent core 15c. It has 22c, 22c, and 22d. Specifically, three low basis weight portions 22c, 22c, and 22d are formed on both side edges of the absorbent core 15c, respectively, and have the same shape and the same size in a plan view along the vertical direction X. It has a pair of low basis weight portions 22c and 22c that are triangular, and a central low basis weight portion 22d that is located between the pair of low basis weight portions 22c and 22c and has a quadrangular plan view shape.

When there are a plurality of horizontal low basis weight portions along the vertical direction X, it is sufficient that any of the horizontal low basis weight portions is formed in the central portion of the vertical direction X, but the functionality as a mark is provided. From the viewpoint of further improvement, it is preferable that any of the laterally low basis weight portions is formed so as to overlap with the lateral center line CLi.
In the fifth embodiment shown in FIG. 9B, the central low basis weight portion 22d overlaps with the horizontal center line CLy.
From the viewpoint of further improving the functionality as a mark of the low basis weight portion, when there are a plurality of horizontal low basis weight portions along the vertical direction X, the horizontal center line of the plurality of horizontal low basis weight portions. It is preferable that the laterally low basis weight portion 22d that overlaps with CLi and the other laterally low basis weight portions 22c and 22c have different planar views.

As shown in FIG. 9C, the absorbent core 15d according to the sixth embodiment has a plan view shape along the vertical direction X at each of both side edges of the absorbent core 15d along the vertical direction X. It has a plurality of quadrangular horizontal low basis weight portions 22e, 22e, 22f. The laterally low basis weight portions 22e and 22f have different lengths in the lateral direction Y. Specifically, along the vertical direction X, the horizontal direction located between the pair of low basis weight portions 22e and 22e having the same length in the horizontal direction Y and the pair of low basis weight portions 22e and 22e. It has a central low basis weight portion 22f having a longer Y length. The central low basis weight portion 22f overlaps with the horizontal center line CLy.

From the viewpoint of further improving the functionality as a mark of the low basis weight portion, when there are a plurality of horizontal low basis weight portions along the vertical direction X, the horizontal center line of the plurality of horizontal low basis weight portions. It is preferable that the laterally low basis weight portion 22f that overlaps with CLi and the other laterally low basis weight portions 22e and 22e have different lengths in the lateral direction Y. In this case, the laterally low basis weight portion having a longer lateral direction Y is referred to as a "horizontally long low basis weight portion", and the laterally low basis weight portion having a shorter lateral direction Y length is referred to as a "horizontally short low basis weight portion". It is called "quantity part". In the present embodiment, the horizontally long low basis weight portion is the central low basis weight portion 22f, and the horizontally short low basis weight portion is a pair of low basis weight portions 22e and 22e. Instead of this, the horizontal low basis weight portion that overlaps with the horizontal center line CLy may be the horizontal short low basis weight portion, and the other horizontal low basis weight portion may be the horizontally long low basis weight portion.

From the viewpoint of further improving the functionality as a mark of the low basis weight portion, the lengths of the horizontally long low basis weight portion and the horizontally short low basis weight portion in each lateral direction Y are preferably within the following ranges.
The length of the horizontally short low basis weight portion in the lateral direction Y is preferably 0.5/4 or more, more preferably 1/4 or more, with respect to the length of the horizontally long low basis weight portion in the lateral direction Y. Further, it is preferably 1/2 or less, more preferably 1 / 2.7 or less, preferably 0.5 / 4 or more and 1/2 or less, and more preferably 1/4 or more and 1 / 2.7 or less.
The difference in length L6 [see FIG. 9 (c)] between the horizontally long low basis weight portion and the horizontally short low basis weight portion in the lateral direction Y is preferably 10 mm or more, more preferably 20 mm or more, and preferably 80 mm. Hereinafter, it is more preferably 70 mm or less, preferably 10 mm or more and 80 mm or less, and more preferably 20 mm or more and 70 mm or less.

In the fifth and sixth embodiments, each of the side edge portions along the vertical direction X has a plurality of horizontal low basis weight portions, but instead, each end portion along the horizontal direction Y has a plurality of horizontal low basis weight portions. It may have a plurality of vertically low basis weight portions. In such a case, among the plurality of vertically low basis weight portions, the vertically low basis weight portion overlapping the vertical center line CLx and the other vertically low basis weight portions have different planar shapes or in the vertical direction. It is preferable that the lengths at X are different from each other. When the lengths of the plurality of vertically low basis weight portions are different from each other in the vertical direction X, the vertically low basis weight portion having the longer length in the vertical direction X is referred to as a "vertical low basis weight portion". The vertically low basis weight portion having a shorter length in the direction X is referred to as a "vertical short basis weight portion". From the viewpoint of further improving the functionality as a mark of the low basis weight portion, the above-mentioned "length of the horizontally long low basis weight portion and the horizontally short low basis weight portion in each lateral direction Y" is referred to as "vertically long low basis weight portion and vertical". It is preferable to apply it as "the length of the short and low basis weight portion in each vertical direction X".

FIG. 10 shows the urine collecting pad 1a of the seventh embodiment. The urine collecting pad 1a of the seventh embodiment has a constricted portion in the vicinity of the inseam M in the vertical direction X, and the front portion F and the rear portion R have a wider width than the confined portion. Further, the rear portion R has a wider width than the front portion F. The absorbent core 15j of the present embodiment has a shape similar to the plan view shape of the urine absorbing pad 1a. As described above, the absorbent core 15j may have a constricted portion in a plan view. The urine collecting pad 1a of the seventh embodiment has the same low basis weight portions 21 and 22 as those of the first embodiment. In the schematic view shown in FIG. 10, the elastic member for forming a three-dimensional gather and the sheet for forming a three-dimensional gather are not shown.

FIG. 11 shows a schematic view of the disposable diaper 100 (hereinafter, simply referred to as “diaper”) which is an absorbent article of the eighth embodiment together with the urine absorbing pad 1 of the first embodiment. The diaper 100 in the figure is in the unfolded state, and the elastic member of each part is extended to the design dimension (the same as the dimension when the elastic member is unfolded in a plane state without any influence of the elastic member). It has become.

_{The diaper 100 has a vertical direction X 1} corresponding to the front-back direction of the wearer and a horizontal direction Y ₁ orthogonal to the vertical direction X 1. The diaper 100 has a total length in the longitudinal direction X ₁ 3 equal portions, the front section A that is disposed on the front side of a wearer, the rear section B which is disposed on the rear side of the wearer when worn, and abdomen It can be divided into a crotch part C located between the side part A and the dorsal side part B. The diaper 100 is a deployable disposable diaper, and fastening tapes 37 are provided on both side edges of the dorsal side portion B. A landing zone (not shown) for fastening the fastening tape 37 is provided on the outer surface of the ventral side A of the diaper 100.

The diaper 100 includes a liquid-retaining absorber 34, which has a liquid-permeable surface sheet on the skin-facing surface side of the absorber 34 and a liquid-impermeable surface sheet on the non-skin-facing surface side of the absorber 34. Alternatively, it is provided with a liquid-impermeable or water-repellent back sheet, respectively (not shown). The diaper 100 has an exterior body 36 on the non-skin facing surface side of the back sheet. The outer body 36 forms the outer shape of the diaper 100 as shown in FIG. 11, and the peripheral edge of the outer body 36 forms the contour line of the diaper 100 in that state. As shown in FIG. 11, the exterior body 36 has both side edges _{of the exterior body 36 along the vertical direction X 1} curved in a convex arc shape toward the center of the _{horizontal direction Y 1 , and the lateral direction Y 1} It is tied up toward the inside of.

In the diaper 100, generally on both sides of the longitudinal X _1, it is arranged standing gather forming sheet having a three-dimensional gather forming elastic members. Due to the contraction of the elastic member for forming the three-dimensional gather, the three-dimensional gather that stands up toward the skin side of the wearer is formed in the inseam C in the wearing state. Further, in the diaper 100, a leg elastic member is usually arranged around the leg in the inseam C in an extended state, and due to the contraction thereof, the leg portion elastic member is arranged in the inseam C in the wearing state around the leg of the wearer. Leg gathers are formed to improve the fit of the diaper. In the schematic view shown in FIG. 11, the elastic member for forming a three-dimensional gather, the sheet for forming a three-dimensional gather, and the leg gather are not shown.

The absorber 34 of the present embodiment includes an absorbent core 35 made of an absorbent material and a core wrap sheet (not shown) that covers the non-skin facing surface of the absorbent core 35. Such a core wrap sheet comprises the above-mentioned colored sheet. Further, the absorbent core 35 has a vertical low basis weight portion 41 and a horizontal low basis weight portion 42 in which the color of the core wrap sheet (colored sheet) can be visually recognized when the diaper 100 is viewed from the surface facing the skin. doing. The basic configuration of the low basis weight portions 41 and 42 is the same as that of the low basis weight portions 21 and 22 in the first embodiment.

In the diaper 100 of the present embodiment, the color of the core wrap sheet, which is a colored sheet, can be visually recognized through the vertical low basis weight portion 41 and the horizontal low basis weight portion 42. Therefore, when the diaper 100 is worn, the wearer The position of the excretory portion of the above can be easily aligned with the absorbent core 35.
When the diaper 100 is used as the outer and the urine absorbing pad 1 is used as the inner, the low basis weight portions 41 and 42 of the diaper 100 and the low basis weight portions 21 and 22 of the urine collecting pad 1 are used as markers. vertical and the center line along the direction X _1, operation combining the longitudinal centerline CLx of incontinence pads, and the lateral bisecting the diaper 100 in the longitudinal direction X ₁ which bisects the diaper 100 in the transverse direction Y ₁ and the center line along the direction Y _1, it is possible to easily perform an operation of combining the horizontal center line CLy of incontinence pad (see FIG. 11). That is, the operation of attaching the urine collecting pad 1 to an appropriate position in the diaper 100 can be easily performed.

The material for forming each part of the urine absorbing pad of the above-described embodiment will be described. As the front surface sheet 12 and the back surface sheet 13, various types conventionally used in the technical field can be used without particular limitation. As the surface sheet 12, a liquid-permeable sheet such as various non-woven fabrics or perforated films that have been subjected to a hydrophilic treatment can be used. Examples of various non-woven fabrics include air-through non-woven fabrics, point-bonded non-woven fabrics, spunbonded non-woven fabrics, spunlaced non-woven fabrics, and three-dimensional shaped non-woven fabrics. Examples of the fibers constituting the non-woven fabric include polypropylene single fibers and polypropylene-polyethylene composite fibers. Further, the back surface sheet 13 may be a material that is impervious to liquid. Liquid impermeability refers to the property of not allowing liquids such as water to pass through, but allowing gases such as water vapor to pass through. As the liquid impervious sheet, a resin film having no moisture permeability, a resin film having fine pores and having moisture permeability, a non-woven fabric such as a water-repellent non-woven fabric, and a laminate of these and another sheet are used. be able to. Examples of the moisture-permeable resin film include a porous film obtained by stretching a synthetic resin film such as polyethylene in which fine powder made of a filler such as calcium carbonate is dispersed and having fine pores. Further, as the back surface sheet 13, a laminate of a liquid-impermeable sheet and a liquid-permeable sheet (for example, non-woven fabric) can also be used.

As the material for forming the absorbent core 15, various materials conventionally used in the art can be used without particular limitation, and for example, a fiber material such as a natural cellulose fiber such as wood pulp or a hydrophilic synthetic fiber; Examples thereof include water-absorbent polymers having a predetermined shape such as particles and fibers, and one of these can be used alone or in combination of two or more. In addition to these, an antibacterial agent or the like may be contained.

As the core wrap sheets 16a and 16b, liquid-permeable sheets can be used, respectively. For example, the core wrap sheets are made hydrophilic by paper such as tissue paper, non-woven fabric made of hydrophilic fibers such as cotton and rayon, and synthetic resin fibers. A treated non-woven fabric, mesh sheet, perforated film or the like can be used. The core wrap sheets 16a and 16b are preferably hydrophilic sheet members.

As the side sheet 19b constituting the leak-proof cuff 19, various types conventionally used in the technical field can be used without particular limitation, and for example, a water-repellent non-woven fabric (spunbond, meltblown, spunbond non-woven fabric (so-called so-called spunbond non-woven fabric)) can be used. SMS, SMMS, SSMMS non-woven fabric), spunbond meltblown non-woven fabric (SM non-woven fabric), spunbond non-woven fabric), resin film sheets, laminates of non-woven fabric and resin film, and the like can be used.
Examples of the elastic member 19a constituting the leakage-proof cuff 19 include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, elastic polyolefin, and polyurethane. The elastic member 19a may be in the form of a thread, a band, or a film.

As the forming material of each part in the diaper of the above-described embodiment, various materials conventionally used in the technical field can be used without particular limitation, and for example, the forming material used for the above-mentioned urine absorbing pad 1 may be used. can.

The method for producing an absorbent core having a low basis weight portion described above will be described by taking the method for producing an absorbent core 15 in the first embodiment as an example. Such an absorbent core 15 can be manufactured according to a conventional method using a known fiber stacking device equipped with a rotating drum. The fiber stacking device typically includes a rotary drum having an accumulation recess formed on the outer peripheral surface thereof, and a duct having a flow path inside the core forming material (absorbent material) in the accumulation recess. While rotating the rotating drum around the rotation axis along the circumferential direction of the drum, the core forming material conveyed on the air flow generated in the flow path by suction from the inside of the rotating drum is used. The fibers are stacked in the accumulation recess. The fiber stack formed in the accumulation recess by the fiber stacking process is the absorbent core 15. The absorbent core 15 can be said to be a fiber stack of the core forming material. The low basis weight portions 21 and 22 are sites formed by intentionally inhibiting the stacking of the forming material in the fiber stacking step. The absorbent core 15 having the low basis weight portions 21 and 22 has a portion corresponding to the low basis weight portions 21 and 22 at the bottom of the accumulation recess as the accumulation recess, and the suction force is smaller than that of the peripheral portion. It can be manufactured by using the set one. Alternatively, as the accumulation recess, a portion corresponding to the low basis weight portions 21 and 22 at the bottom of the accumulation recess may be used so as to protrude outward in the radial direction of the rotating drum as compared with the peripheral portion. good. In the absorbent core 15 obtained by the method using the rotary drum provided with the accumulation recess, the portion where the forming material (absorbent material) is substantially absent or is present at a lower basis weight than the peripheral portion is low. Basis weight portions 21 and 22.

In forming the alignment mark, the low basis weight portions 21 and 22 can be formed by the above-mentioned manufacturing method without adding other constituent members. Therefore, the absorbent article of the present invention is produced by the manufacturing method. Does not require a complicated process. Further, since the mark (low basis weight portion) is formed by partially differentiating the basis weight of the core forming material, equipment such as a printing device and printing ink are not required, and the cost required for these is suppressed. Be done.

The present invention is not limited to the above-described embodiment and can be appropriately modified. Moreover, you may combine the above-described embodiment.
For example, in a form having a horizontally long low basis weight portion and a horizontally short low basis weight portion having a space between the absorbent core and the side edge along the vertical direction X, these horizontally long low basis weight portion and the horizontally short low basis weight portion. The plan view shapes of the above may be different from each other.
Further, in the above-described embodiment, the urine absorbing pad and the deployable disposable diaper are mentioned as examples of the absorbent article of the present invention, but a pants-type disposable diaper or the like may be used. Further, these absorbent articles may be used alone, but as described above, for example, a urine absorbing pad may be used as an inner and another absorbent article (disposable diaper) may be used as an outer, and these may be used in combination. .. The absorbent article serving as the outer may be disposable diapers, cloth pants, rehabilitation pants, or the like. When the inner and outer are used in combination, it is preferable that either the inner or the outer is the absorbent article of the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to such Examples.

[Examples 1 to 6]
A urine absorbing pad having the same basic configuration as the urine absorbing pad 1 shown in FIG. 1 was produced. Specifically, those provided with a front surface sheet, a back surface sheet, and an absorber intervening between them were prepared. A non-woven fabric having a basis weight of 20 g / m ² was used as the front surface sheet, and a composite sheet in which a moisture-permeable film and the non-woven fabric were bonded was used as the back surface sheet. The color of such a composite sheet was white. The absorber had the configuration shown in FIG. 2, that is, it was composed of an absorbent core, a skin-facing surface side core wrap sheet, and a non-skin facing surface side core wrap sheet.
As the skin-facing surface side core wrap sheet of Example 1, hydrophilic tissue paper having ^{a basis weight of 16 g / m 2 was used.} The core wrap sheet on the side facing the skin was white. Further, in Example 1, a colored mount (16 g / m ² ) was used for the core wrap sheet on the non-skin facing surface side. Such a colored mount corresponds to the above-mentioned "colored sheet". The absorbent core of Example 1 was a fiber stack made of a fiber material and a water-absorbent polymer, and had a low basis weight portion formed of a missing portion.
Example In 2-6, using a white backing (16g / m ²⁾ as a non-skin facing side core wrap sheet, and the colored film is a liquid-impermeable sheet as the backsheet (basis weight 20 g / m ² )It was used. Such a colored film corresponds to the above-mentioned "colored sheet". A urine absorbing pad was produced by the same method as in Example 1 except that the white mount and the colored film were used.
In each example, as shown in Table 1, the color of the back surface sheet or the color of the non-skin facing surface side core wrap sheet was different along with the basis weight of the absorbent core. With respect to the urine absorbing pads of these examples, the color difference between the portion where the low basis weight portion is located and the portion other than the portion of the urine absorbing pad facing the skin was measured by the above-mentioned method. Specifically, the color difference between the portion where the low basis weight portion is located and the portion other than the portion of the surface sheet facing the skin was measured. The measurement results are shown in Table 1. In Table 1, "the color difference between the portion of the surface sheet facing the skin where the low basis weight portion is located and the portion other than the portion" is simply expressed as "color difference".

[Evaluation of visibility]
Three panelists visually inspect the urine absorbing pad of each embodiment from the skin-facing surface, confirm the color of the core wrap sheet on the non-skin-facing surface side in the portion where the low basis weight portion is located, and the visibility of the color. Was evaluated. The evaluation was based on the following criteria. In such an evaluation, the average value of the evaluation points scored by each panelist was used as the evaluation result. The evaluation results are shown in Table 1.
3 points: The color of the colored sheet arranged on the non-skin facing surface side of the absorbent core was clearly visible.
2 points: The color of the colored sheet arranged on the non-skin facing surface side of the absorbent core was visually recognized.
1 point: The color of the colored sheet arranged on the non-skin facing surface side of the absorbent core was not visually recognized.

As shown in Table 1, the urine collecting pads of each example had a visibility evaluation of 2 points or more. From the viewpoint of visibility, it was shown that the color difference between the portion where the low basis weight portion is located and the portion other than the portion of the urine absorbing pad facing the skin is preferably 4 or more.

1 Urine absorbing pad 12 Front sheet 13 Back sheet 14 Absorber 15 Absorbent core 16a, 16b Core wrap sheet 19 Leakage-proof cuff 21 Vertical low basis weight part 22 Horizontal low basis weight part 25 Colored sheet CLx Vertical center line CLy Horizontal center line

Claims (6)

Absorbent, comprising an absorbent body comprising an absorbent core made of an absorbent material, having a longitudinal direction corresponding to the anterior-posterior direction extending from the ventral side of the wearer to the dorsal side through the crotch portion and a lateral direction orthogonal to the longitudinal direction. It is a sex article
It has a colored sheet arranged on the non-skin facing surface side of the absorbent core.
The absorbent core has a low basis weight portion in a part of the peripheral portion thereof in which the basis weight of the absorbent material is lower than that of the other portions, and the low basis weight portion is the said in the absorbent core. It is located in the center of the vertical direction or the horizontal direction.
An absorbent article in which the color of the colored sheet is visible in the portion where the low basis weight portion is located when viewed from the surface facing the skin. The absorbent article according to claim 1, wherein the color difference between the portion where the low basis weight portion is located and the portion other than the portion facing the skin is 4 or more. The absorbent article according to claim 1 or 2, wherein the low basis weight portion is a missing portion in which the absorbent material does not exist, or a thin-walled portion having a thickness smaller than that of the other portion. The plan view shape of the low basis weight portion has a plurality of corners.
The low basis weight portion is a vertical center line in which any of the plurality of corners divides the absorbent article into two equal parts in the horizontal direction, or a horizontal center line in which the absorbent article is divided into two equal parts in the vertical direction. The absorbent article according to any one of claims 1 to 3, which overlaps with. The absorbent article according to any one of claims 1 to 4, wherein the low basis weight portion has a space between the low basis weight portion and the peripheral edge of the absorbent core. The absorber comprises a core wrap sheet that covers the surface of the absorbent core.
The low basis weight portion is a missing portion in which the absorbent material does not exist, and in the low basis weight portion, a core wrap sheet that covers the skin-facing surface of the absorbent core and a non-skin facing portion of the absorbent core. The absorbent article according to any one of claims 1 to 5, wherein the core wrap sheet covering the surface is bonded.

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