JP6938820B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article that can remain folded upon disposal.

Generally, absorbent articles include tape-stopping type disposable diapers, light incontinence pads, urine absorbing pads, pants-type disposable diapers, etc., and these absorbent articles depend on the need for long-term care in excretion of the wearer. It is appropriately selected and used. These absorbent articles are composed of a liquid permeable top sheet, a liquid permeable back sheet, and an absorber arranged between the two sheets. By adopting such a configuration, body fluids such as urine permeate through the top sheet of the absorbent article and are absorbed by the absorber, and are prevented from leaking to the outside by the back sheet.

Absorbent articles that have absorbed body fluids such as urine and have been used are discarded in a trash can or the like. Here, if the top sheet is folded inward and discarded, the used top sheet can be hidden and discarded so that the back sheet side that has not been in contact with the skin becomes the surface.

However, in the thin type absorbent article, the rigidity of the highly absorbent polymer sheet is high, and after absorbing the body fluid, the highly absorbent polymer swells and the thickness of the absorbent article increases. Therefore, even if the top sheet is folded inside, the rigidity of the highly absorbent polymer sheet and the thickness of the absorbent article that has absorbed body fluids make it easy to restore the shape before folding, and the top sheet remains hidden. It is difficult to dispose of it.

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

Japanese Unexamined Patent Publication No. 2008-237231 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 together. Further, it is difficult to roll the top sheet of the absorbent article having increased thickness inward by absorbing body fluid, and an engaging means is provided in the central region of the back sheet in the longitudinal direction of the absorbent article having increased thickness. Therefore, even if the absorbent article is rolled, it is easy to restore the shape before folding, and it is difficult to maintain the state. Further, in the absorbent article disclosed in Patent Document 2, the absorbent article is folded only after the anti-slip tape is peeled off from the back sheet and the anti-slip tape is adhered to an appropriate place by the wearer himself / herself. It is inconvenient because it cannot be discarded as it is.

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 capable of keeping the top sheet folded inward when the absorbent article is discarded. And.

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

(1) The first aspect of the present invention is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber arranged between the top sheet and the back sheet. The width of one or more first adhesive portions extending in the longitudinal direction or the width direction of the absorbent article and both ends in the longitudinal direction of the absorbent article on the surface of the back sheet on the clothing side. In the region where the second adhesive portion exists or the region sandwiched between the first adhesive portion and the second adhesive portion, the second adhesive portion extending in the direction is formed. When the absorber does not exist in the thickness direction and the absorbent article is discarded, the top sheet is folded inward and the back in the region sandwiched between the first adhesive portion and the second adhesive portion is used. By folding the sheet toward the top sheet side and adhering the second adhesive portions to each other, the top sheet of the absorbent article can be kept hidden.

( Deleted )

( 2 ) A second aspect of the present invention is the absorbent article according to (1), wherein the back sheet in a region sandwiched between the first adhesive portion and the second adhesive portion is formed. It is characterized in that it can be folded back toward the top sheet side.

In the absorbent article of the present invention, on the surface of the back sheet on the clothing side, at one or more first adhesive portions 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. , A second adhesive portion extending in the width direction is formed. As a result, even if the absorber absorbs the 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 portions to each other, the top sheet of the absorbent article is kept in a hidden state. Therefore, the absorbent article can be discarded while keeping the top sheet folded inward.

It is a top view of the back seat side of the absorbent article of this invention. In the absorbent article of the present invention, a side surface schematically showing a state in which the top sheet is folded inward and the back sheet is folded toward the top sheet in the region sandwiched between the first adhesive portion and the second adhesive portion. It is a figure.

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

<Absorbable 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 worn and the time after the absorbent article 1 is worn. 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. Further, the width direction of the absorbent article 1 is a direction laterally or orthogonal to the longitudinal direction. Further, the body-side surface is the surface of the front and back surfaces of each member of the absorbent article 1 that is arranged on the wearer's skin side when worn, and the clothing-side surface is the surface of each member of the absorbent article 1. Of the front and back sides, this is the side that faces the wearer's skin side when worn. Body fluid refers to the liquid excreted from the body such as urine, blood, and water in loose stool. Further, the use of the absorbent article 1 is not particularly limited, and generally, regardless of whether it is for infants or adults, a tape-stop type disposable diaper, a pants type disposable diaper, a urine absorbing pad, a light incontinence pad, etc. It may be a sanitary product or the like.

The absorbent article 1 is between a liquid-permeable top sheet arranged on the body side surface, a liquid-impermeable back sheet 21 arranged facing the top sheet, and the top sheet and the back sheet 21. It comprises an arranged absorber 22 and.

[Top sheet]
The top sheet may be formed of a base material having a liquid permeability that allows body liquid to move to the absorber. For example, a non-woven fabric such as an air-through non-woven fabric, a thermal bond non-woven fabric, or a spunbond non-woven fabric, or a thermal bond / spunbond. It is formed from a material such as a composite non-woven fabric in which the above is laminated, an open film such as an opening polyethylene film, a foamed film such as polyethylene foam and urethane foam, or a composite sheet in which these are laminated. Further, the surface of the top sheet may be embossed or perforated in order to improve the liquid permeability. As a method for performing these embossing and drilling processes, known methods can be carried out without limitation. Further, 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 moisturizer 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. The shape of the top sheet is not particularly limited, but any shape that covers the absorber, which is required to guide the body fluid to the absorber so as not to leak, may be used.

[Backsheet]
The back sheet 21 may be formed by using a base material having a liquid impermeable property so that the body fluid held by the absorber 22 does not wet the clothes, and the resin film or the resin film and the non-woven fabric are laminated. It is formed from a material such as a composite sheet. The non-woven fabric used for the composite sheet is not particularly limited in the manufacturing method. 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 21 ^{is preferably 20 g / m 2} or more and 40 g / m ² or less. Further, in order to prevent stuffiness at the time of mounting, it is preferable that the back seat 21 is provided with breathability. In order to provide the back sheet 21 with breathability, for example, a filler may be blended in the resin film of the base material, or the back sheet 21 may be embossed. Calcium carbonate can be mentioned as the filler, and a known method can be used without limitation as the blending method.

As shown in FIGS. 1 (a) and 1 (b), on the surface of the back sheet 21 on the clothing side, one or more first adhesive portions 211 extending in the longitudinal direction or the width direction of the absorbent article 1 and one or more first adhesive portions 211 At both ends of the absorbent article 1 in the longitudinal direction, a second adhesive portion 212 extending in the width direction is formed. Even when the absorbent body 22 absorbs the 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 toward the top sheet side. As a result, after the top sheet is folded inward, the second adhesive portion 212 is further folded toward the top sheet side as shown in FIG. 2, so that the second adhesive portions 212 can be easily adhered to each other. , The absorbent article 1 can be discarded while keeping the top sheet 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 surface of the backsheet 21 on the clothing side. However, it is preferable to form a plurality of rows so as to extend in the longitudinal direction or the width direction of the back sheet 21, and it is more preferable to form three rows at equal intervals in the longitudinal direction of the back sheet 21. By forming the first adhesive portion 211, it is possible to prevent the absorbent article 1 from slipping when the absorbent article 1 is attached to the underwear.

(Second adhesive part)
As shown in FIG. 1, it is preferable to form a second adhesive portion 212 extending in the width direction at both ends in the longitudinal direction of the absorbent article 1 on the surface of the back sheet 21 on the clothing side. As a result, even when the absorbent body 22 absorbs the 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, the second adhesive portion 212 can be easily folded toward the top sheet side.

It is preferable that the absorber 22 does not exist in the thickness direction 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, and FIG. As shown in the above, 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. As a result, even if the absorber 22 absorbs the body fluid and the thickness is increased, 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 adhesive portion 212 may have a shape such as a circle, an ellipse, or a triangle, but is preferably a rectangle having a short side of 2 mm or more and 30 mm or less. Within the above range, the second adhesive portion 212 can be arranged in a range that 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, a polyacrylic acid ester, a vinyl acetate-ethylene copolymer, or a vinyl acetate-acrylic copolymer can be used. , Polymethylmethacrylate, polystyrene, styrene-acrylic copolymer, polyester resin, epoxy resin, butadiene-styrene copolymer and other hot melt adhesives. Only one of these may be used, or a plurality of these may be blended and used. By applying the above adhesive to, for example, the back sheet 21, the first adhesive portion 211 and the second adhesive portion 212 can be formed. Further, the same adhesive may be used for the first adhesive portion 211 and the second adhesive portion 212, or individual adhesives may be used.

The adhesive used for the first adhesive portion 211 and the second adhesive portion 212 is formed by applying the adhesive on the back sheet 21, or by applying the adhesive on the release sheet and then transferring it onto the back sheet 21. NS.

A detachable release sheet may be provided on the first adhesive portion 211 and the second adhesive portion 212. As the release sheet, for example, paper such as glassine paper, paraffin paper, silicone paper, fiber such as non-woven fabric, or resin sheet is used. The release sheet may be provided integrally on the first adhesive portion 211 and the second adhesive portion 212, or may be individually provided, and the folded absorbent article 1 is packaged. It may also serve as a packaging sheet to be used.

[Absorber]
The absorber 22 preferably contains an absorbent fiber as a base material and a highly absorbent polymer (SAP). The absorbent fiber is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, disposable diapers and urine absorbing pads. For example, fluff pulp, cotton, rayon, acetate, tissue, absorbent paper and hydrophilic fiber. Examples include rayon. 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 absorbent fibers are used for the absorber 22, it is preferable that the ^{entire absorber 22 has a basis weight of 100 g / m 2} or more and 800 g / m ^{2 or less.} The absorber 22 may be in a high-pressure pressed state. Further, when the absorbent fiber 22 is not used, it may be composed of only the SAP sheet.

The highly absorbent polymer of the absorber 22 is not particularly limited as long as it can absorb body fluids and prevent backflow, and is a sodium polyacrylate-based polymer, a polyaspartic acid salt-based polymer, or a (starch-acrylic acid) graft. A copolymer formed from a material such as a copolymer, a (acrylic acid-vinyl alcohol) copolymer, a (isobutylene-maleic anhydride) copolymer and a 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 absorber 22, the morphology of the absorbent fiber and the SAP may be one formed by mixing SAP particles in the absorbent fiber, or a SAP sheet in which SAP particles are fixed between the absorbent fibers. preferable. The basis weight of the entire absorber 22 ^{is preferably 100 g / m 2} or more and 900 g / m ² or less. Further, for the purpose of preventing leakage of SAP particles and stabilizing the shape of the absorber, it is preferable to wrap the absorber 22 in a carrier sheet. The base material of the carrier sheet may be any one having hydrophilicity, and examples thereof include hydrophilic non-woven fabrics such as tissue, absorbent paper, air-laid non-woven fabric, hydrophilic spun-pound non-woven fabric, and hydrophilic air-through non-woven fabric. When a plurality of carrier sheets are provided, the base materials of the carrier sheets may be the same or different.

<Manufacturing method of absorbent articles>
As a method for producing the absorbent article 1, a well-known method can be adopted. For example, (A) absorbent fibers are stacked together with a highly absorbent polymer to form an absorbent mat to form an absorbent 22. Step, (B) Step of fixing and integrating the top sheet and three-dimensional gather with hot melt adhesive, (C) Step of applying hot melt adhesive to the inside of top sheet, three-dimensional gather, and back sheet 21 , (D) In the collective drum, a step of arranging a top sheet on the upper part of the absorber 22 and a back sheet 21 on the lower part of the absorber 22 to fix and integrate each component, (E) Absorbent article 1. Examples thereof include a manufacturing method including a step of cutting a semi-finished product to product dimensions with a cutter device and separating individual absorbent articles 1. Then, in the present invention, the first adhesive portion 211 and the second adhesive portion 212 may be formed on the back sheet 21 of the semi-finished product of the absorbent article 1.

1 Absorbent article 21 Backsheet 22 Absorbent 211 First adhesive part 212 Second adhesive part

Claims (2)

An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber arranged between the top sheet and the back sheet.
On the surface of the back sheet on the clothing side, one or more first adhesive portions extending in the longitudinal direction or the width direction of the absorbent article and both ends in the longitudinal direction of the absorbent article extend in the width direction. The existing second adhesive is formed and
In the region where the second adhesive portion exists or the region sandwiched between the first adhesive portion and the second adhesive portion, the absorber does not exist in the thickness direction.
When disposing of the absorbent article, the top sheet is folded inward, the back sheet in the region sandwiched between the first adhesive portion and the second adhesive portion is folded toward the top sheet side, and the second adhesive portion is adhered. An absorbent article capable of maintaining a hidden state of the top sheet of the absorbent article by adhering the portions together. The absorbent article according to claim 1, wherein the back sheet in the 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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