JP2018102870A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of preventing color of a part of an indicator from being changed before using the absorbent article by preventing SAP included in an absorber from coming into contact with the indicator, while retaining original functions of the indicator.SOLUTION: The absorbent article includes: a carrier sheet for covering an absorber; a moisture-reactive indicator formed on a body-side surface of a back sheet; and a water-impermeable sheet joined with a body-side surface of the carrier sheet. Longitudinal and width-directional sizes of the water-impermeable sheet are respectively larger than the longitudinal and width-directional sizes of the indicator, and both of width-directional both ends and longitudinal both ends of the water-impermeable sheet are located outside the longitudinal both ends and width-directional both ends of the indicator.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent article having a moisture-responsive indicator.

  In general, an absorbent article is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. The body fluid such as is absorbed by the absorbent body through the top sheet. Here, conventionally, an indicator that changes color due to the reaction of moisture of body fluid when urinated is used for absorbent articles such as paper diapers for infants of tape-clamping type or pants type. Since the absorbent article includes the indicator, it is possible to grasp the replacement time of the absorbent article for infants.

  However, depending on the nature of the absorbent article and the environment in which the absorbent article is placed, part of the indicator may be discolored even before use, and the function as an indicator may not be fully exhibited. It was.

  Therefore, in an absorbent article provided with an indicator, means for preventing the indicator from being discolored before the absorbent article is used has been studied. For example, Patent Literature 1 discloses an absorbent article in which a hydrophilic fiber nonwoven fabric is disposed between an absorbent body and a carrier sheet in order to prevent the indicator from moving to the absorbent body. Patent Document 2 discloses an absorbent article having a coating layer formed of a liquid-permeable and water-repellent nonwoven so as to cover the indicator and prevent the indicator and the carrier sheet from contacting each other. . Patent Document 3 includes an indicator composed of a hydrophilic resin coating layer and a notification mark, and a hydrophilic resin coating layer and a notification mark are superimposed on the body side of the absorbent body. An absorbent article is disclosed in which the provided portion has lower moisture permeability than the other portions.

Japanese Patent No. 5591018 Japanese Patent No. 4709646 Japanese Patent No. 4558356

  However, any of the absorbent articles of Patent Documents 1 to 3 does not sufficiently cope with the problem of discoloration of the indicator before use, and part of the indicator may be discolored before use. Moreover, since it tried to prevent discoloration of the indicator before use of an absorbent article, the function of the original indicator might fall. Therefore, the present invention has been made in view of the above problems, and while maintaining the original function of the indicator, it is possible to prevent a part of the indicator from being discolored before use of the absorbent article. It is to provide a simple and low-cost absorbent article.

  The inventors of the present invention have conducted extensive research in view of the above problems. As a result, the phenomenon that part of the indicator discolors before use of the absorbent article is that the superabsorbent polymer (SAP) having a small particle size in the absorbent body contacts the indicator after passing through the carrier sheet covering the absorbent body. And when the paper diaper was put in the high humidity environment in that state, it discovered that SAP which touched the indicator absorbed moisture, and the moisture-absorbed SAP and the indicator reacted. Therefore, the inventors of the present invention pay attention to preventing SAP from coming into contact with the indicator, a carrier sheet that covers the absorber, a moisture-responsive indicator formed on the body-side surface of the backsheet, According to an absorbent article having a water-impermeable sheet bonded to the body-side surface of the carrier sheet, the indicator and the water-impermeable sheet have a predetermined size and positional relationship, the above problem can be solved. The headline and the present invention were completed. Specifically, the present invention provides the following.

  (1) A first aspect of the present invention is an absorbent having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet. The absorbent article includes a carrier sheet that covers the absorbent body, a moisture-responsive indicator formed on the body-side surface of the backsheet, and a non-bonded body-side surface of the carrier sheet. A water-permeable sheet, wherein the dimensions of the water-impermeable sheet in the longitudinal direction and the width direction are larger than the dimensions of the indicator in the longitudinal direction and the width direction, respectively. And both the longitudinal direction both ends are absorbent articles which are located in the outer side of the longitudinal direction both ends and the width direction both ends of the said indicator.

  (2) The 2nd mode of the present invention is an absorptive article given in (1), and both the width direction both ends and the longitudinal direction both ends of the impermeable sheet are the width direction of the indicator. It is located 5.0 mm or more outside from both ends and both ends in the longitudinal direction.

  (3) A third aspect of the present invention is the absorbent article according to (1) or (2), wherein a dimension in the width direction of the water-impermeable sheet is 4 mm or more and 30 mm or less. It is what.

  (4) A fourth aspect of the present invention is the absorbent article according to any one of (1) to (3), wherein the water-impermeable sheet is a polyethylene sheet. is there.

  (5) A fifth aspect of the present invention is the absorbent article according to any one of (1) to (4), wherein the water-impermeable sheet is bonded to the carrier sheet by hot melt. It is characterized by.

(6) A sixth aspect of the present invention is the absorbent article according to any one of (1) to (5), wherein the basis weight of the water-impermeable sheet is 10 g / m ² or more and 25 / m. It is characterized by being ² or less.

  (7) A seventh aspect of the present invention is the absorbent article according to any one of (1) to (6), wherein the carrier sheet is a tissue or spunbonded nonwoven fabric. It is.

  The absorbent article of the present invention has a moisture-responsive indicator formed on the body-side surface of the back sheet, and a water-impermeable sheet bonded to the body-side surface of the carrier sheet. Therefore, when bodily fluid is excreted, moisture is transmitted to the indicator through the carrier sheet, so that the indicator is discolored and the original function of the indicator can be maintained even if the water-impermeable sheet is provided. Moreover, the dimensions in the longitudinal direction and the width direction of the water-impermeable sheet are larger than the dimensions in the longitudinal direction and the width direction of the indicator, respectively. It is located outside both ends in the longitudinal direction and both ends in the width direction of the indicator. For this reason, SAP with a small particle size contained in the absorber can be prevented from contacting the indicator, and a part of the indicator can be prevented from being discolored before the absorbent article is used. Moreover, since the member used for the absorbent article of the present invention is not special, a simple and low-cost absorbent article can be provided.

It is the top view seen from the top sheet side, when using the absorbent article which concerns on embodiment of this invention as a tape stop paper diaper. FIG. 2 is a schematic cross-sectional view taken along line X ₁ -X _{1 in} FIG. 1.

  Hereinafter, with reference to FIG.1 and FIG.2, the tape stop paper diaper is demonstrated in detail as an example of the absorbent article 1 which concerns on embodiment of this invention. The absorbent article may be a light incontinence pad, a pants-type paper diaper, a tape-capped paper diaper, or other absorbent articles, regardless of whether it is for babies or adults, and is not particularly limited. In the description of the present embodiment, the same reference numerals are given to the same elements throughout. In the following description of the present specification, the body fluid refers to a liquid discharged from the body such as urine, blood, and water in soft stool. In addition, in description of this specification, the longitudinal direction of the absorbent article 1 is a direction over front and back of the wearer when the absorbent article 1 is worn, and is a direction indicated by a symbol Y in the figure. Moreover, the width direction of the absorbent article 1 is a direction that is transverse or orthogonal to the longitudinal direction, and is a direction indicated by a symbol X in the drawing. Furthermore, in this specification, the body side surface of the absorbent article 1 refers to the surface that comes into contact with the wearer's skin when the absorbent article 1 is worn, and the clothing side surface is worn when the absorbent article 1 is worn. The surface that comes into contact with the person's clothing.

<Absorbent article>
Drawing 1 is a top view seen from the top sheet side, when using absorbent article 1 concerning an embodiment of the present invention as a tape stop paper diaper. 2 is a schematic cross-sectional view of the absorbent article 1 taken along line X ₁ -X ₁ in FIG. As shown in FIGS. 1 and 2, the absorbent article 1 includes a liquid-permeable top sheet 21 disposed on the body side, and a liquid-impermeable back sheet 23 disposed to face the top sheet 21. And an absorbent body 22 disposed between the top sheet 21 and the back sheet 23. Thereby, the absorber 22 becomes a structure sandwiched between the top sheet 21 and the back sheet 23. Moreover, the absorber 22 is covered with a carrier sheet 25 described later. Further, the absorbent article 1 includes a predetermined indicator 27 and a water-impermeable sheet 26 which will be described later.

[Top sheet]
The top sheet 21 only needs to be formed from a base material having liquid permeability such that body fluid moves to the absorbent body 22. For example, a nonwoven fabric such as an air-through nonwoven fabric, a thermal bond nonwoven fabric, and a spunbond nonwoven fabric, It is formed from a material such as a composite nonwoven fabric obtained by laminating spunbond, an open film such as an open polyethylene film, a foam film such as polyethylene foam or urethane foam, or a composite sheet obtained by laminating these. Further, the top sheet 21 may be embossed or perforated on the surface in order to improve the liquid permeability. As a method for performing these embossing and perforating processes, a known method can be carried out without limitation. In order to reduce irritation to the skin, the top sheet 21 may contain a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent and the like.

From the viewpoints of strength, workability, and liquid return amount, the basis weight of the top sheet 21 is preferably 18 g / m ² or more and 40 g / m ² or less. Although there is no restriction | limiting in particular as a shape of the top sheet 21, What is necessary is just the shape which covers the absorber 22 required in order to guide a bodily fluid to the absorber 22 so that there may be no leak.

[Absorber]
The absorber 22 contains an absorbent fiber as a base material and a superabsorbent polymer (SAP). The absorber 22 may be a single layer or multiple layers.

(Absorbent fiber)
The absorbent fiber is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, paper diapers, and urine pads. For example, fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, hydrophilic paper Can be mentioned. Among these, it is preferable to use fluff pulp from the viewpoint of absorbability. Examples of fluff pulp include wood pulp (for example, softwood bleached kraft pulp (N-BKP) such as Southern pine or Douglas fir), synthetic fiber, resin fiber, non-wood pulp, etc. it can. When fluff pulp is used for the absorbent fiber as the base material for the absorbent body 22, the basis weight of the absorbent fiber is preferably 100 g / m ² or more and 800 g / m ² or less for the entire absorbent body 22. . Thereby, more body fluids can be absorbed without impairing the touch.

(SAP)
The SAP of the absorbent 22 is not particularly limited as long as it absorbs body fluids and can prevent backflow. Sodium polyacrylate copolymer, polyaspartate copolymer, (starch-acrylic) An acid) graft copolymer, an (acrylic acid-vinyl alcohol) copolymer, an (isobutylene-maleic anhydride) copolymer and a saponified product thereof can be used. Among these, a sodium polyacrylate copolymer is preferable from the viewpoint of the amount of absorption per weight.

The basis weight of the SAP contained in the absorber 22 is preferably 50 g / m ² or more and 500 g / m ² or less for the entire absorber 22. Moreover, it is preferable that the weight of SAP is 15 mass% or more and 50% mass% or less with respect to the whole absorber. By setting it within the above numerical range, gel blocking in the absorber 22 can be prevented, and a large amount of body fluid can be absorbed in the absorber 22.

  In the absorbent body 22, the absorbent fiber and the SAP are preferably formed by mixing SAP particles in the absorbent fiber, or an SAP sheet in which the SAP particles are fixed between the absorbent fibers.

[Carrier sheet]
Moreover, the absorbent article 1 of this invention has the carrier sheet 25 which covers the absorber 22 from the objective of leakage prevention of SAP particle | grains and the stabilization of the shape of the absorber 22, as shown in FIG. The carrier sheet 25 may have any hydrophilic base material, and examples thereof include hydrophilic non-woven fabrics such as tissue, absorbent paper, spunbonded non-woven fabrics, and airlaid non-woven fabrics. From the viewpoint, in the present invention, a tissue or spunbonded nonwoven fabric is preferable. When a plurality of carrier sheets 25 are provided, the base material of the carrier sheet 25 may be the same or different.

[Back sheet]
The back sheet 23 may be formed using a base material having liquid impermeability so that the body fluid held by the absorbent body 22 does not wet the clothing, and the resin film or the resin film and the nonwoven fabric are laminated. Formed from a material such as a composite sheet. The non-woven fabric used for the composite sheet is not particularly limited, and examples thereof include a spunbond nonwoven fabric and a meltblown nonwoven fabric, or a composite nonwoven fabric obtained by laminating spunbond / meltblown, spunbond / meltblown / spunbond, and composite materials thereof. Can be mentioned. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene.

From the viewpoint of strength and workability, the basis weight of the back sheet 23 is preferably 15 g / m ² or more and 40 g / m ² or less. Moreover, in order to prevent the stuffiness at the time of mounting | wearing, it is preferable to give the back seat | sheet 23 breathability. In order to provide the back sheet 23 with air permeability, for example, a filler may be added to the resin film of the base material, or the back sheet 23 may be embossed for perforation. In addition, calcium carbonate can be mentioned as a filler, The compounding method can perform a well-known method without a restriction | limiting.

(Side flap)
In the absorbent article 1 of the present invention, at least a pair of side flaps 28 may be formed on both sides in the width direction of the back side portion and the back side portion of the back sheet 23. Further, each of the side flaps 28 on the back side portion may be provided with a side panel 281 at the edge in the width direction on the free end side, and two fastening tapes 282 at the edge in the width direction on the free end side of the side panel 281. Good. Moreover, the side panel 281 and the fastening tape 282 are not limited to those formed by separate members, and may be formed integrally. The fastening tape 282 is provided with fastening means 283 formed of a hook member constituting a surface fastener for fastening the abdomen and the back side on the body side, and each fastening tape 282 on the free end side of the fastening means 283 is provided. A knob margin 284 may be provided at the tip. On the other hand, the clothing side surface of the abdomen may be provided with a target tape (not shown) formed of a loop member constituting a hook-and-loop fastener, and in a state where the absorbent article 1 is attached to the wearer, the fastening means 283 is fixed to a target tape which is a loop member. Thereby, the absorbent article 1 of this invention can be set as the structure of a tape stop paper diaper.

  In addition, as a base material of the side flap 28, the nonwoven fabric which consists of polyethylene, a polypropylene, a polystyrene, etc. can be mentioned, You may combine these base materials independently or more than one. Moreover, as a base material of the side panel 281 and the fastening tape 282, the resin film and nonwoven fabric which consist of polyethylene, a polypropylene, a polystyrene etc. can be mentioned, You may combine these base materials independently or multiple. The hook member refers to a member that is three-dimensionally molded or raised in a hook shape among the members that constitute the hook-and-loop fastener, and the loop member is a member that forms a pair with the hook member, and is closely packed in a loop shape. It refers to a member that has been brushed. The hook-and-loop member is configured by a pair of the hook member and the loop member. When wearing the absorbent article 1, wear it by bringing the abdomen part to the abdomen side of the wearer with the back side part applied to the wearer's back and fastening the fastening tape 282 to the target tape. Can be worn by a person.

(Three-dimensional gather)
As shown in FIG.1 and FIG.2, in order to prevent the side leakage of the bodily fluid excreted by the user, the absorbent article 1 has a three-dimensional gather on the top sheet 21 along the longitudinal direction of the absorbent article 1. A pair of three-dimensional gathers 24 having the elastic member 241 and the three-dimensional gather sheet 242 may be provided. The three-dimensional gather 24 is preferably fixed to the back sheet 23 at the width direction end (fixed end) of the absorbent article 1, and the free end side is preferably folded in half at the end. And it is preferable that the elastic member 241 for three-dimensional gathers is clamped by the three-dimensional gather sheet 242 of the free end side folded in half. Thereby, the three-dimensional gather 24 can have a standing property and can be deformed in accordance with the wearer's body shape.

  As the three-dimensional gathered elastic member 241, for example, polyurethane yarn, strip-like polyurethane film, synthetic rubber, yarn-like or strip-like natural rubber or the like is used, and the three-dimensional gather sheet 242 is a water repellent formed of hydrophobic fibers. Alternatively, a liquid-impermeable nonwoven fabric such as a spunbond nonwoven fabric, a meltblown nonwoven fabric, a composite nonwoven fabric in which spunbond / meltblown / spunbond is laminated, or the like is used. The thickness of the elastic member 241 for the three-dimensional gather is preferably 620 dtex or less.

(Leg gather)
As shown in FIG. 1, the absorbent article 1 of the present invention may be provided with a pair of left and right leg gathers 29 from the abdominal side to the back side of the absorbent article 1. The leg gathers 29 are formed of, for example, an elastic member such as rubber thread and a sheet such as a nonwoven web. By providing the leg gathers 29, it is possible to improve the fit at the part around the crotch.

(West gather)
As shown in FIG. 4, the absorbent article 1 of the present invention is formed so that the absorbent article 1 is in contact with the circumference of the wearer's waist so that both longitudinal ends of the absorbent article 1 are in close contact with the waist. You may provide the waist gathers 30 comprised by. The waist gathers 30 may have any shape such as a thread shape, a strip shape, and a waist belt shape, and are arranged along the width direction rather than the longitudinal direction of the absorbent article 1 to control the stretch characteristics of the absorbent article 1. . As the waist gather 30, for example, any elastic shrinkable material such as one or a plurality of thread rubbers, a waist belt in which the thread rubbers are fixed to a nonwoven web, an elastomer film, an elastic foam material, an elastomer cloth, or the like can be used.

[indicator]
The absorbent article 1 of the present invention has a moisture-responsive indicator 27 formed on the body side surface of the backsheet 23. Since the indicator 27 changes color when wet with body fluid, it is possible to identify from the outside that the body fluid has been excreted. As shown in FIG. 2, the indicator 27 is not completely covered with the water-impermeable sheet 26. Therefore, when body fluid is excreted, moisture is transmitted to the indicator 27 via the carrier sheet 25. Even if the indicator 27 changes color and has the water-impermeable sheet 26, the original function of the indicator 27 can be maintained. A plurality of indicators 27 may be provided at the central portion in the width direction of the back sheet 23 so as to extend linearly in the longitudinal direction. The indicator 27 may be, for example, a base polymer such as polyethylene glycol or glycerin mixed with an indicator such as ethyl red or bromophenol blue and an adhesive such as wax and bonded by hot melt.

[Non-permeable sheet]
As shown in FIG. 2, the absorbent article 1 of the present invention has a water-impermeable sheet 26 bonded to the body-side surface of the carrier sheet 25. The dimensions of the water-impermeable sheet 26 in the longitudinal direction and the width direction are larger than the dimensions of the indicator in the longitudinal direction and the width direction, respectively. Also, the indicator 27 is located outside both ends in the longitudinal direction and both ends in the width direction. For this reason, SAP with a small particle size contained in the absorber 22 can be prevented from coming into contact with the indicator 27, and a part of the indicator 27 can be prevented from being discolored before the absorbent article 1 is used. Can do.

  Moreover, it is preferable that both the width direction both ends and the longitudinal direction both ends of the water-impermeable sheet 26 are located 5.0 mm or more outside from the width direction both ends and the longitudinal direction both ends of the indicator 27. Moreover, it is preferable that the dimension of the width direction of the water-impermeable sheet 26 is 4 mm or more and 30 mm or less, and it is more preferable that it is 10 mm or more and 20 mm or less. Thus, by providing the position and dimensions of the water-impermeable sheet 26, it is effective that the SAP having a small particle size contained in the absorber 22 contacts the indicator 27 while maintaining the original function of the indicator 27. Can be prevented.

  The water-impermeable sheet 26 may be formed using a base material having water-impermeable properties, and is formed from a material such as a resin film or a composite sheet obtained by laminating a resin film and a nonwoven fabric. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene. In the present invention, a polyethylene sheet having excellent water permeability is preferable. The nonwoven fabric used for the composite sheet is not particularly limited, and examples thereof include spunbond nonwoven fabric and meltblown nonwoven fabric, or composite nonwoven fabric obtained by laminating spunbond / meltblown, spunbond / meltblown / spunbond, and composite materials thereof. Can be mentioned.

Although the base material which joins the water-impermeable sheet 26 to the carrier sheet 25 is not particularly limited, it is preferably joined by hot melt. Further, from the viewpoint of strength and workability, the basis weight of the water-impermeable sheet 26 is preferably 10 g / m ² or more and 25 g / m ² or less, and preferably 12 g / m ² or more and 22 g / m ² or less. More preferably, it is more preferably 14 g / m ² or more and 20 g / m ² or less.

In addition, as above-mentioned, the absorbent article 1 of this invention may be a pants-type paper diaper. In that case, although the absorbent article 1 has an absorptive main body, an interior body, and an exterior body, as a base material used for an interior body and an exterior body, a thermal bond nonwoven fabric and a spun bond nonwoven fabric can be used. The basis weight of the inner body and outer body is preferably 15 g / ^{m 2} or more 40 g / ^{m 2} or less.

[Method of manufacturing absorbent article]
A well-known method can be adopted as a manufacturing method in the case where the absorbent article 1 is a tape-stopper diaper. For example, an absorbent body 22 covered with a carrier sheet 25 to which a water-impermeable sheet 26 is bonded in advance, a top sheet 21 in which a three-dimensional gather 24 is disposed, a back sheet in which a waist gather 30, a leg gather 29, and a side flap 28 are disposed. 23 are integrated, folded, and then cut into a predetermined length for manufacturing. As a means for integrating the members, a hot melt adhesive, heat embossing, ultrasonic embossing, high frequency embossing, or the like can be used. It is preferable that the fastening tape 282 is bonded to the back sheet 23 in advance by bonding the fastening means 283 to a base material constituting the fastening tape 282, cutting it into a predetermined shape. An indicator 27 is provided in advance on the body side surface of the backsheet 23. In storing the absorbent article 1 in a package or the like, the absorbent article 1 may be folded in the longitudinal direction and the width direction.

  Hereinafter, the present invention will be described in detail with reference to examples. In addition, this invention is not limited to the Example shown below at all.

<Example 1>
(Absorbent article)
9 g of fluff pulp and 8 g of SAP, which were pulverized by pulverizing the pulp sheet, were stacked to prepare an absorbent body. This absorbent body is wrapped with a carrier sheet in which a water-impermeable sheet is bonded to the body-side surface in advance, laminated together with a top sheet and a back sheet, and a three-dimensional gather, leg gather, waist gather, and side dimensions are formed in the longitudinal direction. Produced a tape-clamped paper diaper having a width of 450 mm and a width of 280 mm to obtain an absorbent article of Example 1. In addition, the body side surface of the backsheet is provided with an indicator having a longitudinal dimension of 200 mm and a widthwise dimension of 7.5 mm. All were formed so that it might be located in the outer side of the longitudinal direction both ends and the width direction both ends. Note that the top sheet, using a air-through nonwoven fabric (basis weight 20 g / ^{m 2),} the backsheet, with a non-breathable polyethylene sheet (basis weight 18g / ^{m 2).} Furthermore, 1 g of SAP was randomly arranged in advance between the absorbent body and the non-permeable sheet on the non-skin contact side in order to clarify the evaluation result. Discoloration evaluation of the indicator of the obtained absorbent article was performed.

(Discoloration evaluation)
The obtained absorbent article was set under conditions of a temperature of 50 ° C. and a humidity of 70% using a high-humidity high-temperature bath. Meanwhile, a 1 kg load was applied to each sheet. After 24 hours, visually confirm the discoloration state of the indicator, “◯” when there is no discoloration, “△” when there is partial discoloration, and “×” when there is general discoloration. "

  Table 1 summarizes the structure of the absorbent article produced and the results of discoloration evaluation.

<Example 2>
The absorbent article of Example 2 was produced by a production method basically the same as the production method of the absorbent article of Example 1, and the results of the part and discoloration evaluation relating to the configuration different from the absorbent article of Example 1 Are summarized in Table 1.

<Comparative Examples 1 and 2>
The absorbent articles of Comparative Examples 1 and 2 were produced by basically the same production method as that for the absorbent articles of Examples 1 and 2, and the results of the parts and discoloration evaluation relating to different configurations are shown in Table 1. Summarized.

  The absorbent articles shown in Examples 1 and 2 have a water-impermeable sheet, and the dimensions of the water-impermeable sheet in the longitudinal direction and the width direction are larger than the dimensions of the indicator in the longitudinal direction and the width direction, respectively. Since the indicator did not touch the indicator, the flame color of the indicator was not seen.

  The absorbent article shown in Comparative Example 1 is a portion in which the dimensions of the water-impermeable sheet in the longitudinal direction and the width direction are smaller than the dimensions of the indicator in the longitudinal direction and the width direction, respectively, and the water-impermeable sheet and the indicator do not overlap. Was generated, discoloration was observed when SAP touched the part and the SAP absorbed moisture.

  Moreover, since the absorbent article shown in Comparative Example 2 does not have a water-impermeable sheet, discoloration was observed when the SAP contacted the indicator and the SAP absorbed moisture.

DESCRIPTION OF SYMBOLS 1 Absorbent article 21 Top sheet 22 Absorber 23 Back sheet 24 Three-dimensional gather 241 Three-dimensional gather elastic member 242 Three-dimensional gather sheet 25 Carrier sheet 26 Water-impermeable sheet 27 Indicator 28 Side flap 281 Side panel 282 Fastening tape 283 Fastening means 284 Knob Shiro 29 Leg Gather 30 West Gather

Claims (7)

A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent article disposed between the top sheet and the back sheet,
The absorbent article includes a carrier sheet that covers the absorber, a moisture-responsive indicator formed on the body-side surface of the backsheet, and a water-impermeable sheet bonded to the body-side surface of the carrier sheet, Have
The longitudinal and width dimensions of the water-impermeable sheet are larger than the longitudinal and width dimensions of the indicator, respectively.
Both the width direction both ends and the longitudinal direction both ends of the said water-impermeable sheet are absorbent articles which are located in the outer side of the longitudinal direction both ends and the width direction both ends of the said indicator.   Both the width direction both ends and the longitudinal direction both ends of the said water-impermeable sheet are both located outside 5.0 mm or more from the width direction both ends and the longitudinal direction both ends of the said indicator. Absorbent articles.   The absorptive article according to claim 1 or 2 whose size of the width direction of said water-impermeable sheet is 4 mm or more and 30 mm or less.   The absorbent article according to any one of claims 1 to 3, wherein the water-impermeable sheet is a polyethylene sheet.   The absorbent article according to claim 1, wherein the water-impermeable sheet is bonded to the carrier sheet by hot melt. The absorbent article according to any one of claims 1 to 5, wherein the basis weight of the water-impermeable sheet is 10 g / m ² or more and 25 g / m ² or less.   The absorbent article according to any one of claims 1 to 6, wherein the carrier sheet is a tissue or a spunbonded nonwoven fabric.

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