JP2018015463A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which can maintain a state in which, a top sheet is folded to inside, when discarding the absorbent article.SOLUTION: The absorbent article comprises one or more first adhesion parts extending in a longitudinal direction or a width direction of the absorbent article, and second adhesion parts extending in the width direction on both end parts of the absorbent article in a longitudinal direction, on a surface on a clothing side of the back sheet in the absorbent article.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent article that can hold a folded state when discarded.

  In general, tape-type disposable diapers, light incontinence pads, urine-absorbing pads, pants-type disposable diapers, etc. are known as absorbent articles. These absorbent articles can be used according to the need for care in the excretion of the wearer. Are appropriately selected and used. These absorbent articles are composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the two sheets. By adopting such a configuration, body fluid such as urine passes through the top sheet of the absorbent article and is absorbed by the absorbent body, and does not leak to the outside by the back sheet.

  Absorbent articles that have been used after absorbing body fluids such as urine are discarded in a trash can. Here, if the top sheet is folded inward and discarded, the used top sheet can be concealed and discarded with the back sheet side not contacting the skin being the surface.

  However, in a thin type absorbent article, the rigidity of the superabsorbent polymer sheet is high, and after absorbing body fluid, the superabsorbent polymer swells and the thickness of the absorbent article increases. For this reason, even when folded with the top sheet facing inward, it is easy to restore the shape before folding due to the rigidity of the superabsorbent polymer sheet and the thickness of the absorbent article that has absorbed body fluid, and the top sheet remains hidden. Difficult to dispose of.

  Here, in Patent Document 1, an engaging member is provided in the central region in the longitudinal direction of the back sheet, and a fixing means is provided in the front region of the back sheet, whereby the absorbent article is rolled up, and the engaging member and the fixing means An absorbent article that can be discarded while being rolled by bonding is disclosed. Further, in Patent Document 2, by providing a slip-off preventing tape that can be attached to and detached from the back sheet with a hook-and-loop fastener, the slip-off preventing tape is peeled off from the back sheet, and the end of the top sheet opposite to the end of the back sheet An absorptive article that can be discarded while the absorbent article is folded is disclosed by adhering an anti-slip tape so as to sandwich the sheet, folding the absorbent article, and adhering the top sheet to the adhesive layer of the anti-skid tape .

JP 2008-237231 A Japanese Patent No. 5827455

  However, in the absorbent article disclosed in Patent Document 1, since the distance between the engaging member and the fixing means is short, even if the top sheet can be hidden by folding the top sheet inward, it is fixed to the engaging member. It is difficult to glue the means. Furthermore, it is difficult to roll the top sheet of the absorbent article that absorbs bodily fluid and has an increased thickness, and in addition, an engagement means is provided in the center area in the longitudinal direction of the back sheet in the absorbent article having an increased thickness. For this reason, even if the absorbent article is rolled, it is easy to restore the form before folding, and it is difficult to maintain the state. Moreover, in the absorbent article disclosed in Patent Document 2, the anti-slipping tape is peeled from the back sheet, and the absorbent article is folded unless the wearer attaches the anti-slipping tape to an appropriate place. This is inconvenient because it cannot be discarded.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article that can maintain a state in which the top sheet is folded inward when the absorbent article is discarded. And

  The inventors of the present invention have conducted intensive research in view of the above problems. As a result, on the garment-side surface of the back sheet of the absorbent article, at one or more first adhesive portions extending in the longitudinal direction or the width direction of the absorbent article, and at both longitudinal ends of the absorbent article, the width It has been found that the above problem can be solved by forming the second adhesive portion extending in the direction, and the present invention has been completed.

  (1) A first aspect of the present invention is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. Further, on the garment-side surface of the back sheet, at least one first adhesive portion extending in the longitudinal direction or the width direction of the absorbent article, and at both ends in the longitudinal direction of the absorbent article, the width The absorbent article has a second adhesive portion extending in the direction.

  (2) The 2nd mode of the present invention is an absorptive article given in (1), and is the field where said 2nd adhesion part exists, or said 1st adhesion part and said 2nd adhesion part. The absorber is not present in the thickness direction in a region sandwiched between layers.

  (3) The 3rd mode of the present invention is an absorptive article given in (1) or (2), in the field between the 1st adhesion part and the 2nd adhesion part. The back sheet can be folded back toward the top sheet.

  In the absorbent article of the present invention, on the garment-side surface of the backsheet, at least one first adhesive portion extending in the longitudinal direction or the width direction of the absorbent article, and both longitudinal ends of the absorbent article A second adhesive portion extending in the width direction is formed. Thereby, even when the absorbent body absorbs body fluid and the thickness of the absorbent article increases, the top sheet is folded inward and the back sheet in the region sandwiched between the first adhesive portion and the second adhesive portion is topped. By folding to the sheet side and adhering the second adhesive parts, the top sheet of the absorbent article is kept hidden. Therefore, the absorbent article can be discarded while the top sheet is folded inward.

It is a top view by the side of a back sheet of an absorptive article of the present invention. In the absorbent article of the present invention, the side surface schematically represents a state in which the top sheet is folded inward and the back sheet in the region sandwiched between the first adhesive portion and the second adhesive portion is folded to the top sheet side. FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

<Absorbent article>
In the description of the present specification, the time when the absorbent article 1 is worn means at least one of the time when the absorbent article 1 is attached and after the attachment. The longitudinal direction of the absorbent article 1 is a direction extending in front of and behind the wearer when the absorbent article 1 is worn. Moreover, the width direction of the absorbent article 1 is a direction transverse or orthogonal to the longitudinal direction. Further, the body-side surface is a surface arranged on the skin side of the wearer when wearing among the front and back surfaces of each member of the absorbent article 1, and the clothing-side surface is the surface of each member of the absorbent article 1. Of the front and back surfaces, the surface is directed to the side opposite to the wearer's skin when worn. Body fluid refers to fluid discharged from the body, such as urine, blood, and water in loose stool. Furthermore, the use of the absorbent article 1 is not particularly limited, and is generally a tape-type disposable diaper, a pants-type disposable diaper, a urine-absorbing pad, a light incontinence pad, for infants or adults, It may be a sanitary product or the like.

  The absorbent article 1 includes a liquid-permeable top sheet disposed on the body-side surface, a liquid-impermeable back sheet 21 disposed opposite the top sheet, and the top sheet and the back sheet 21. And an arranged absorber 22.

[Top sheet]
The top sheet may be formed from a base material having liquid permeability so that body fluid moves to the absorbent body. Is formed from a material such as a composite nonwoven fabric obtained by laminating films, an opening 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 films. In addition, the top sheet may be embossed or perforated to improve 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 may contain a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent and the like.

From the viewpoint of strength and workability, the basis weight of the top sheet is preferably 15 g / m ² or more and 40 g / m ² or less. Although there is no restriction | limiting in particular as a shape of a top sheet, What is necessary is just the shape which covers an absorber required in order to guide a bodily fluid to an absorber so that there may be no leak.

[Back sheet]
The back sheet 21 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 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. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene.

From the viewpoints of strength and workability, the basis weight of the backsheet 21 is preferably 20 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 sheet 21 air permeability. In order to provide the back sheet 21 with air permeability, for example, a filler may be blended in the resin film of the base material, or the back sheet 21 may be embossed. In addition, calcium carbonate can be mentioned as a filler, The compounding method can perform a well-known method without a restriction | limiting.

  As shown in FIGS. 1 (a) and (b), on the clothing side surface of the back sheet 21, one or more first adhesive portions 211 extending in the longitudinal direction or the width direction of the absorbent article 1, At both ends in the longitudinal direction of the absorbent article 1, a second adhesive portion 212 extending in the width direction is formed. Even when the absorbent body 22 absorbs body fluid to increase the thickness and it is difficult to fold the absorbent article 1, the second adhesive portions 212 are formed at both ends in the longitudinal direction of the absorbent article 1. Therefore, it is easy to fold the second adhesive portion 212 to the top sheet side. As a result, after the top sheet is folded inward, the second adhesive portion 212 can be easily bonded to each other by further folding the second adhesive portion 212 toward the top sheet as shown in FIG. The absorbent article 1 can be discarded while the top sheet is folded inward.

(First adhesive part)
As shown in FIGS. 1A and 1B, one or more first adhesive portions 211 extending in the longitudinal direction or the width direction of the absorbent article 1 are formed on the clothing side surface of the backsheet 21. Then, it is preferable to form a plurality of rows so as to extend in the longitudinal direction or the width direction of the backsheet 21, and it is more preferable to form three rows at equal intervals in the longitudinal direction of the backsheet 21. By forming the first adhesive portion 211, it is possible to prevent the absorbent article 1 from shifting when the absorbent article 1 is attached to the underwear.

(Second adhesive part)
As shown in FIG. 1, it is preferable to form the 2nd adhesion part 212 extended in the width direction in the longitudinal direction both ends of the absorbent article 1 in the surface by the side of the clothing of the back seat | sheet 21. As shown in FIG. Thereby, even if it is difficult for the absorbent body 22 to absorb body fluid to increase the thickness and to fold the absorbent article 1, the second adhesive portions 212 are formed at both longitudinal ends of the absorbent article 1. Therefore, the second bonding portion 212 can be easily folded to the top sheet side.

  In the region where the second adhesive portion 212 exists or the region sandwiched between the first adhesive portion 211 and the second adhesive portion 212, it is preferable that the absorber 22 does not exist in the thickness direction. As shown, it is particularly preferable that the back sheet 21 in the region sandwiched between the first adhesive portion 211 and the second adhesive portion 212 can be folded back toward the top sheet side. Thereby, even if the absorber 22 absorbs bodily fluid and the thickness increases, the second adhesive portion 212 is formed at both ends in the longitudinal direction of the absorbent article 1 and the second adhesive portion 212 is formed. The absorber 22 is not arranged in the thickness direction in the existing region or the region sandwiched between the first adhesive portion 211 and the second adhesive portion 212. Therefore, even when it is difficult to fold the absorbent article 1, the second adhesive portion 212 can be easily folded on the top sheet side.

  The second bonding portion 212 may have a circular shape, an elliptical shape, a triangular shape, or the like, but is preferably a rectangle having a short side of 2 mm or more and 30 mm or less. If it is the said range, the 2nd adhesion part 212 can be arrange | positioned in the range which does not overlap with the absorber 22 in the thickness direction.

  The pressure-sensitive adhesive used for the first adhesive portion 211 and the second adhesive portion 212 can be used without particular limitation. For example, polyacrylic acid ester, vinyl acetate-ethylene copolymer, vinyl acetate-acrylic copolymer And hot-melt pressure-sensitive adhesives such as polymethyl methacrylate, polystyrene, styrene-acrylic copolymer, polyester resin, epoxy resin, and butadiene-styrene copolymer. These may be used alone or in a blend of a plurality. For example, the first adhesive portion 211 and the second adhesive portion 212 can be formed by applying the above-described pressure-sensitive adhesive to the back sheet 21. Moreover, the 1st adhesion part 211 and the 2nd adhesion part 212 may use the same adhesive, and may use an individual adhesive.

  The pressure-sensitive adhesive used for the first bonding portion 211 and the second bonding portion 212 is formed by applying a pressure-sensitive adhesive on the back sheet 21 or by transferring the pressure-sensitive adhesive onto the release sheet and then transferring it onto the back sheet 21. The

  On the 1st adhesion part 211 and the 2nd adhesion part 212, the peeling sheet provided so that attachment or detachment was possible may be provided. For the release sheet, for example, paper such as glassine paper, paraffin paper, and silicone paper, fibers such as nonwoven fabric, and resin sheets are used. Note that the release sheet may be provided integrally on the first adhesive portion 211 and the second adhesive portion 212, or may be provided individually, and the folded absorbent article 1 is packaged. It may also serve as a packaging sheet.

[Absorber]
The absorber 22 preferably contains an absorbent fiber as a base material and a superabsorbent polymer (SAP). 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 the fluff pulp include wood pulp (for example, B-BKP such as Southern pine and Douglas fir), non-wood pulp and the like defibrated into cotton. When using absorbent fibers into the absorbent body 22, the entire absorbent member 22, it is preferable that the 100 g / ^{m 2} or more 800 g / ^{m 2} or less of the basis weight. In addition, the absorber 22 may be in a high-pressure pressed state. Moreover, when not using an absorptive fiber for the absorber 22, you may be comprised only by the SAP sheet.

The superabsorbent polymer of the absorbent body 22 is not particularly limited as long as it absorbs body fluids and can prevent backflow. Sodium polyacrylate, polyaspartate, (starch-acrylic acid) graft Those formed from materials such as a copolymer, (acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer and saponified product thereof can be used. Among these, sodium polyacrylate is preferable from the viewpoint of the amount of absorption per weight. SAP of the absorbent body 22, the entire absorbent member 22, preferably in a 10 g / ^{m 2} or more 400 g / ^{m 2} or less of basis weight, it is preferable that the content of 10 mass% or more and 100 mass% or less.

In the absorbent body 22, the form of the absorbent fiber and the SAP may be that formed by mixing SAP particles in the absorbent fiber, or a SAP sheet in which the SAP particles are fixed between the absorbent fibers. preferable. The basis weight of the entire absorbent body 22 is preferably 100 g / m ² or more and 900 g / m ² or less. Moreover, it is preferable to wrap the absorber 22 in a carrier sheet for the purpose of preventing leakage of SAP particles and stabilizing the shape of the absorber. The substrate of the carrier sheet is not particularly limited as long as it has hydrophilicity, and examples thereof include hydrophilic nonwoven fabrics such as tissue, absorbent paper, airlaid nonwoven fabric, hydrophilic spun pond nonwoven fabric, and hydrophilic air-through nonwoven fabric. In the case where a plurality of carrier sheets are provided, the base material of the carrier sheet may be the same or different.

<Method for producing absorbent article>
The manufacturing method of the absorbent article 1 can employ a well-known method. For example, (A) Absorbent fibers are stacked together with a superabsorbent polymer to create an absorbent mat, and the absorbent body 22 is formed. A step, (B) a step of fixing and integrating the top sheet and the three-dimensional gather with a hot-melt adhesive, and (C) a step of applying a hot-melt adhesive on the inside of the top sheet, the three-dimensional gather, and the back sheet 21. (D) In the assembly drum, a step of disposing a top sheet on the upper part of the absorbent body 22 and a back sheet 21 on the lower part of the absorbent body 22 to fix and integrate the constituent members, (E) the absorbent article 1 The manufacturing method etc. which have the process of cutting a semi-finished product with a product dimension with a cutter apparatus, and cut | disconnecting each absorbent article 1 can be mentioned. And in this invention, what is necessary is just to form the 1st adhesion part 211 and the 2nd adhesion part 212 in the back sheet 21 of the semi-finished product of the absorbent article 1.

DESCRIPTION OF SYMBOLS 1 Absorbent article 21 Back sheet 22 Absorber 211 1st adhesion part 212 2nd adhesion part

Claims (3)

An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet,
The garment-side surface of the backsheet extends in the width direction at one or more first adhesive portions extending in the longitudinal direction or the width direction of the absorbent article, and at both longitudinal ends of the absorbent article. An absorptive article in which an existing second adhesive portion is formed.   2. The absorber according to claim 1, wherein the absorber does not exist in a thickness direction in a region where the second adhesive portion exists or a region sandwiched between the first adhesive portion and the second adhesive portion. Absorbent articles.   The absorbent article according to claim 1 or 2, wherein the back sheet in a region sandwiched between the first adhesive portion and the second adhesive portion can be folded back toward the top sheet side.

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