JP2018099459A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article where generation of bend wrinkles can be suppressed more, leakage of body fluid can be effectively prevented, and touch when worn is excellent.SOLUTION: An absorbent article has a top sheet, a back sheet, and an absorber and is divided by two folding lines almost equally into three in a longitudinal direction. The absorbent article is divided into a front part, a crotch part, and a back part. The crotch part of the absorbent article extends in a width direction symmetrically across a width direction center line, and forms more than pairs of embossment patterns shorter than the dimension of the width direction of the absorber, ranging from the top sheet to the absorber. In the absorbent article, each of more than pairs of embossment patterns forms an embossment groove or intermittent embossment pattern.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorptive article having a good touch and effectively preventing leakage of body fluids.

  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 is absorbed by the absorbent body through the top sheet. This absorbent article has various absorption amounts depending on the amount of body fluid discharged in the assumed usage situation. Among these, light incontinence liners, light incontinence pads, and the like are known as those that absorb a relatively small amount of discharged body fluid.

  Absorbent articles are usually folded individually into three folds and individually wrapped, and a plurality of them are packaged together with plastic film. When consumers use absorbent articles, the individual packaging must be The absorbent article is taken out, and the absorbent article is attached to the undergarment using a slip stopper tape provided on the clothing side surface of the absorbent article.

  The absorbent body of the absorbent article is composed mainly of absorbent fibers and a superabsorbent polymer, and is required to have an appropriate thickness and cushioning property. And, as for the absorbent article, various kinds of products are generally sold for each absorption amount, but as the absorption amount of the absorbent article increases, the thickness of the absorber becomes thicker, and when it is folded in three at the time of packaging, A crease having a random angle in the width direction is generated in the entire top sheet including the vicinity of the folded portion. Such a crease may cause discomfort due to irregular irregularities when worn, may cause skin troubles such as itching, and the appearance when worn is not preferable. Random creases also cause leakage of body fluid in the width direction.

  As an invention that has addressed such a problem, for example, Patent Document 1 discloses an absorbent article having a plurality of substantially rectangular or substantially elliptical embossed recesses in a top sheet, the major axis direction of the embossed recesses. Is formed so as to be at an angle of approximately 30 degrees to approximately 90 degrees with respect to the direction of the maximum applied force among the applied forces acting on the top sheet by the movement of the wearer. An article is disclosed. Patent Document 2 discloses a top sheet of an absorbent article that includes a first fiber sheet and a second fiber sheet, both of which include heat-fusible fibers and are embossed. It is united by a plurality of embossing crevices, and a plurality of embossing crevices are intermittently arranged in each of the 1st direction and the 2nd direction which crosses this, and, thereby, on the skin opposing surface of the 1st fiber sheet, A top sheet is disclosed in which a plurality of predetermined first discontinuous lines extending in the first direction are arranged and a plurality of predetermined second discontinuous lines extending in the second direction are arranged.

JP 2004-298454 A JP2015-112339A

  However, neither the absorbent article described in Patent Document 1 nor the top sheet of the absorbent article described in Patent Document 2 can sufficiently suppress the occurrence of creases, and the problem of body fluid leakage, There was still room for improvement to the problem. Therefore, the present invention has been made in view of the above problems, and an absorbent article that is more comfortable to wear while being worn while suppressing the occurrence of creases and effectively preventing leakage of bodily fluids. The purpose is to provide.

  The inventors of the present invention have conducted extensive research in view of the above problems. As a result, the crotch portion of the absorbent article sandwiched between the two fold lines extends in the width direction symmetrically across the width direction center line and extends from the top sheet to the absorber in the width direction of the absorber. According to an absorbent article in which a plurality of pairs of embossed patterns shorter than the above dimension is formed, the present inventors have found that the above problems can be solved, and have completed the present invention. Specifically, the present invention provides the following.

  (1) A first aspect of the present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. The absorbent article is divided into approximately three equal parts in the longitudinal direction by the fold line, and the absorbent article is applied to the wearer's abdomen, and the front part is closer to the end than the two fold lines. And the crotch part sandwiched between the two fold lines and the back part of the absorbent article that is applied to the back side of the wearer and is closer to the end part side than the two fold lines. Are formed in a plurality of pairs of embossed patterns that extend in the width direction symmetrically across the center line in the width direction, extend from the top sheet to the absorber, and are shorter than the dimension in the width direction of the absorber, Each of the plurality of pairs of embossed patterns forms an embossed groove or intermittent embossed pattern. It is the goods.

  (2) The second aspect of the present invention is the absorbent article according to (1), characterized in that the interval between the front and rear embossed patterns is 1 cm or more and 8 cm or less.

  (3) A third aspect of the present invention is the absorbent article according to (1) or (2), wherein a plurality of pairs of embossed patterns are arranged at equal intervals in the longitudinal direction, About the pattern, the dimension of the width direction is substantially the same, It is characterized by the above-mentioned.

  (4) A fourth aspect of the present invention is the absorbent article according to (1) or (2), wherein a plurality of pairs of embossed patterns are arranged at equal intervals in the longitudinal direction, and the longitudinal center The dimension in the width direction of the emboss pattern gradually increases or decreases from the portion toward the end in the longitudinal direction.

  (5) A fifth aspect of the present invention is the absorbent article according to (1) or (2), wherein a plurality of pairs of embossed patterns are directed from the longitudinal center to the longitudinal end. It is formed in a convex shape.

  In the absorbent article of the present invention, since a plurality of pairs of emboss patterns extending in the width direction are formed in the crotch portion of the absorbent article, folds are formed in other parts of the absorbent article. Can be effectively prevented. In addition, since the plurality of pairs of the embossed patterns are formed by forming a top sheet and an absorbent body in a cross-sectional mountain shape between the embossed patterns, the top of the mountain shape is brought into contact with the wearer's crotch, thereby touching the absorbent article. Can be made good. Furthermore, in the absorbent article of the present invention, since the dimension of the embossing pattern extending in the width direction is shorter than the dimension of the absorber, even if the body fluid stays in the embossing pattern, Therefore, it is possible to absorb the staying body fluid and effectively prevent leakage of the body fluid.

It is a top view of the absorptive article of the present invention. It is drawing which shows the formation pattern of the embossing pattern in the absorbent article of this invention.

<Absorbent article>
As the absorbent article 1 according to the embodiment of the present invention, a light incontinence pad is exemplified, but the absorbent article 1 of the present invention is not limited to this, and a light incontinence liner, a sanitary napkin, other It may be an absorbent article. The absorbent article 1 includes a liquid-permeable top sheet 10 disposed on the body-side surface, a liquid-impermeable back sheet 30 facing the top sheet 10 and disposed on the clothing-side surface, the top sheet 10 and And the absorbent body 20 disposed between the back sheets 30, whereby the absorbent body 20 is sandwiched between the top sheet 10 and the back sheet 30. The absorbent article 1 is folded by being divided into approximately three equal parts in the longitudinal direction by two folding lines 40 extending in the width direction during individual packaging, and is folded in three in the longitudinal direction during packaging. The absorbent article 1 is applied to the wearer's belly side, the front part 1a on the end side of the two folding lines 40, the crotch part 1b located between the wearer's crotch, and the wearer's back side And the rear portion 1c on the end side of the two folding lines 40.

[Top sheet]
The top sheet 10 allows body fluid to pass quickly toward the absorbent body 20, and is disposed to face the back sheet 30 with the absorbent body 20 interposed therebetween. Since the top sheet 10 is a sheet that comes into contact with the skin, the substrate does not irritate the skin with a soft touch, for example, a nonwoven fabric such as a thermal bond nonwoven fabric typified by an air-through nonwoven fabric, a thermal bond / span It is formed from a material such as a composite nonwoven fabric in which bonds are laminated, an open film such as an open polyethylene film, a foam film such as polyethylene foam or urethane foam, or a composite sheet in which these are laminated. The top sheet 10 may be a single layer or a plurality of layers, and a large number of through holes may be formed in order to impart dry touch properties.

As the nonwoven fabric, synthetic fibers such as polyethylene, regenerated fibers such as rayon, and natural fibers such as cotton are used, as well as those obtained by known processing methods such as the spunlace method and the spunbond method in addition to the thermal bond method. Can be used. From the viewpoint of workability and strength, the basis weight of the top sheet 10 is preferably 18 g / m ² or more and 40 g / m ² or less. In order to reduce irritation to the skin, a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizer, and the like may be applied to the top sheet 10. The top sheet 10 may have a shape such as an hourglass shape or a substantially rectangular shape having a constricted portion at the longitudinal center where the wearer's crotch is positioned, and extends slightly outward from the side edge of the absorbent body 20. May be provided.

In the present invention, a liquid diffusive sheet may be provided between the top sheet 10 and the absorbent body 20 in order to promote diffusion of body fluid to the upper surface of the absorbent body 20. Examples of such liquid diffusive sheets include nonwoven fabrics such as air-through nonwoven fabric, point bond nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric, and composite nonwoven fabrics laminated with spunbond / meltblown and spunbond / meltblown / spunbond. it can. The thickness of the liquid diffusive sheet is preferably 0.1 mm or more, and the basis weight thereof is preferably 15 g / m ² or more. The shape of the liquid diffusive sheet is not particularly limited, but is preferably a shape that can completely cover the surface of the absorbent body 20 so that liquid such as urine can be diffused throughout the absorbent body 20.

(Matched embossed pattern)
In the present invention, the top sheet 10 preferably has a matched emboss pattern having a three-dimensional concave and convex portion. Thereby, the touch of the top sheet 10 can be made favorable. Here, the matched emboss pattern is disclosed in, for example, JP-T-2002-512660, and includes a convex roller having a large number of convex bodies and a concave roller having a large number of concave bodies complementary to the convex bodies. Thus, the non-woven fabric is sandwiched so that the convex body and the concave body mesh with each other, and heat is applied as necessary. The top sheet 10 used for the absorbent article 1 of the present invention has such a matched embossed pattern, so that it is kept bulky. Moreover, since the recessed part and the convex part are formed in the plane of the top sheet 10 by giving the matched emboss pattern to the top sheet 10, the air permeability in the planar direction of the top sheet 10 is maintained well.

  The top embossed pattern of the topsheet 10 has a circular or oval shape: a regular polygon or a polygon such as a triangle, a quadrangle, a pentagon, a hexagon, a heptagon, an octagon, or the like; Preferably, they are parallel straight lines; or curves parallel to each other. In the case of a polygon, the vertical dimension may be longer than the horizontal dimension, and the horizontal dimension may be longer than the vertical dimension. May be. In a more preferred embodiment, the matched emboss pattern of the top sheet 10 in the absorbent article 1 of the present invention is a honeycomb pattern in which hexagonal or regular hexagonal recesses and hexagonal or regular hexagonal recesses are continuously formed. Preferably there is.

  The area ratio of the concave portions of the matched emboss pattern of the top sheet 10 is preferably 5% or more and 90% or less, and more preferably 15% or more and 80% or less. By setting the area ratio within the above range, the three-dimensional shape of the matched emboss pattern is sufficiently maintained, and the bulkiness of the top sheet 10 is favorably maintained.

[Back sheet]
The back sheet 30 is made of a sheet material having liquid impermeability and water blocking properties so that body fluid does not leak outside the absorbent article 1, but even if it has moisture permeability to prevent stuffiness. Good. Examples of the material of the back sheet 30 having such characteristics include a thin plastic sheet such as a polyethylene sheet and a polyethylene laminated nonwoven fabric. The backsheet 30 may have a shape such as an hourglass shape or a substantially rectangular shape having a constricted portion at the longitudinal center where the wearer's crotch is positioned, and extends slightly outward from the side edge of the absorbent body 20. May be provided. An adhesive layer for fixing the absorbent article 1 to an underwear or the like when worn may be provided on the clothing side surface of the backsheet 30. When the absorbent article 1 has a pressure-sensitive adhesive layer, it may have a release sheet for protecting the pressure-sensitive adhesive layer, and this release sheet is partially bonded to the packaging sheet of the absorbent article 1. Also good. The top sheet 10 and the back sheet 30 may form a flap that is fixed by a hot melt adhesive or heat seal without sandwiching the absorbent body 20 at least at a part of the end, such as an end in the longitudinal direction. Good.

[Absorber]
The absorber 20 contains an absorbent fiber as a base material and a superabsorbent polymer (hereinafter also referred to as SAP). The absorbent fiber is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, diapers, and urine absorbing 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 such fluff pulp include wood pulp, synthetic fiber, polymer fiber, non-wood pulp and the like that have been fibrillated into cotton. It is preferable that the absorbent fibers of the absorbent body 20 have a basis weight of 100 g / m ² or more and 800 g / m ² or less so as not to impair the absorption performance and the touch.

The superabsorbent polymer of the absorbent body 20 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. The SAP amount of the absorbent body 20 is preferably set to a basis weight of 50 g / m ² or more and 500 g / m ² or less, and a content of 15% by mass or more and 60% by mass or less so as not to impair the absorption performance and the touch. Is preferred.

  In the absorbent body 20, the absorbent fibers and SAP are preferably in the form of a laminated mat formed by mixing SAP particles in the absorbent fibers. Moreover, it is preferable to wrap the absorber 20 in a carrier sheet for the purpose of preventing leakage of SAP particles and stabilizing the shape of the absorber 20. The base material 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, and airlaid nonwoven fabric. When a plurality of carrier sheets are provided, the base material of the carrier sheet may be the same or different, and the way of wrapping the absorbent body 20 with the carrier sheet is not particularly limited.

  The absorber 20 may be formed by laminating an upper layer absorber and a lower layer absorber. In this case, the dimensions of the upper layer absorber and the lower layer absorber in the longitudinal direction and the width direction may be such that the size of the upper layer absorber is larger than the size of the lower layer absorber, and the size of the upper layer absorber is the same as the size of the lower layer absorber. The dimension of an upper layer absorber may be smaller than the dimension of a lower layer absorber.

[Emboss pattern]
FIG. 1 is a plan view of an absorbent article 1 of the present invention. As shown in FIG. 1, at least the crotch portion 1b of the absorbent article 1 of the present invention is symmetrical in the width direction across the width direction center line (the center line in the width direction extending in the longitudinal direction). A plurality of pairs of embossed patterns 22 extending from the top sheet 10 to the absorber 20 and shorter than the dimension in the width direction of the absorber 20 are formed. By forming a plurality of pairs of the embossed patterns 22, it is possible to effectively prevent folds from being formed in other parts of the absorbent article 1. Further, since the plurality of pairs of embossed patterns 22 form the top sheet 10 and the absorbent body 20 in an area sandwiched between the embossed patterns 22 into a cross-sectional mountain shape, the top of the mountain shape is regularly and stably reduced between the wearer's crotch. The touch of the absorbent article 1 can be made favorable by making contact with the contact area. Furthermore, in the absorbent article 1 of the present invention, the dimension of the embossed pattern 22 extending in the width direction is shorter than the dimension of the absorbent body 20 in the width direction. The staying body fluid can be absorbed by the absorber 20 at the end of the direction, and leakage of the body fluid can be effectively prevented. In addition, in the absorbent article 1 of the present invention, forming the embossed pattern 22 makes it easier for the absorbent article 1 to bend in the thickness direction along the body with the embossed pattern 22 as a starting point. The fitting property of the property article 1 to the body is improved, and leakage of body fluid can be effectively prevented.

  Each of the plurality of pairs of emboss patterns 22 formed on the absorbent article 1 of the present invention forms an intermittent emboss pattern in which continuous emboss grooves or formed portions and non-formed portions of the emboss pattern 22 are alternately formed. ing. When all of the plurality of pairs of embossed patterns 22 are formed as embossed grooves, the bodily fluid excreted in a large amount by the absorbent article 1 is captured by the embossed pattern 22, whereby the length of the bodily fluid on the surface of the top sheet 10. The diffusion rate in the direction can be reduced. In addition, when all of the plurality of pairs of embossing patterns 22 are intermittent embossing patterns, the body fluid excreted in a small amount in the absorbent article 1 is caused by the presence of the intermittent portions of the embossing pattern 22 so that the body fluid on the surface of the top sheet 10 is long. Can help diffuse in the direction. In the latter case, since the embossed portion includes an intermittent portion as compared with the former, the absorbent article 1 can be finished softly, and the touch when worn can be made better.

  The distance between the front and rear embossing patterns 22 is preferably 1 cm or more and 8 cm or less, and more preferably 1.5 cm or more and 4.5 cm or less. When the distance between the embossed patterns 22 is within the above range, it is possible to effectively suppress a decrease in absorption performance due to overforming of the embossed pattern 22 while effectively suppressing the formation of creases. it can.

(Formation of embossed pattern)
FIG. 2 is a drawing showing a formation pattern of the emboss pattern 22 in the absorbent article 1 of the present invention. Hereinafter, the formation mode of the embossing pattern 22 will be described. As an embodiment of the present invention, a plurality of pairs of embossing patterns 22 are arranged at equal intervals in the longitudinal direction. Can be substantially the same. Further, as another embodiment of the present invention, the plurality of pairs of embossed patterns 22 are arranged at equal intervals in the longitudinal direction, and the widthwise direction of the embossed pattern 22 extends from the longitudinal center to the longitudinal end. The dimensions can be gradually increasing or decreasing. As yet another aspect of the present invention, the plurality of pairs of embossed patterns 22 can be formed in a convex shape from the center in the longitudinal direction toward the end in the longitudinal direction. In addition, when a plurality of pairs of the embossed patterns 22 are formed in a convex shape from the longitudinal center to the longitudinal end, the absorbent article 1 sufficiently follows the twist of the body. It is possible to improve the fit between the absorbent article 1 and the body and effectively prevent leakage of bodily fluids.

  The emboss pattern 22 formed in the present invention may be formed in combination with other channel embosses extending in the longitudinal direction. For example, when the embossed pattern 22 is connected to another channel emboss extending in the longitudinal direction, the body fluid captured on the embossed pattern 22 and transmitted in the width direction is transferred to the other channel embossed extending in the longitudinal direction, resulting in a wider area. Can quickly absorb bodily fluids. Moreover, even if not connected directly, the embossed pattern 22 may extend in the width direction to the vicinity of other channel embosses extending in the longitudinal direction.

[Three-dimensional gather]
A solid gather may be provided on the body contact side surface of the absorbent article 1. This three-dimensional gather forms a body fluid confinement space together with the top sheet 10 so as to prevent the body fluid from leaking. It is preferable that the three-dimensional gather includes a three-dimensional gather sheet and a stretchable elastic member disposed along the free end of the three-dimensional gather sheet. As the elastic elastic member, a thread-like, string-like, or flat-shaped member made of natural rubber, synthetic rubber, polyurethane, or the like can be appropriately used.

<Method for producing absorbent article>
There is no limitation in particular as a manufacturing method of absorptive article 1, and a conventionally well-known method can be adopted, for example, after arranging a liquid diffusion sheet and solid gathers beforehand in top sheet 10 as needed. The top sheet 10 and the back sheet 30 are sandwiched between the top sheet 10 and the back sheet 30 while the embossed pattern 22 extending from the top sheet 10 to the absorber 20 is formed. It can be manufactured by fixing with a hot melt adhesive, heat embossing, ultrasonic embossing, high frequency embossing or the like over a part or the entire circumference. And after individually wrapping this in a package, what is necessary is just to fold it into three in the longitudinal direction and fold it.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range of the invention as described in said embodiment, A various change or It will be apparent to those skilled in the art that improvements can be made. Further, it is apparent from the scope of the claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Absorbent article 1a Front part 1b Crotch part 1c Rear part 10 Top sheet 20 Absorbent body 22 Embossed pattern 30 Back sheet 40 Folding line

Claims (5)

It has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet, and is divided into approximately three equal parts in the longitudinal direction by two folding lines. An absorbent article,
The absorbent article is applied to the wearer's ventral side, and is applied to the front part on the end side of the two fold lines, the crotch part sandwiched between the two fold lines, and the back side of the wearer. It is divided into a rear part on the end side from the two folding lines,
The crotch portion of the absorbent article has a plurality of pairs of embossments that extend in the width direction symmetrically across the center line in the width direction and extend from the top sheet to the absorbent body and shorter than the width dimension of the absorbent body A pattern is formed,
The absorbent article in which each of the plurality of pairs of embossed patterns forms an embossed groove or an intermittent embossed pattern.   The absorptive article according to claim 1 whose interval of embossing patterns adjacent to the back and forth is 1 cm or more and 8 cm or less.   The absorbent article according to claim 1 or 2, wherein a plurality of pairs of embossed patterns are arranged at equal intervals in the longitudinal direction, and the dimensions in the width direction are substantially the same for all the embossed patterns.   The plurality of pairs of embossed patterns are arranged at equal intervals in the longitudinal direction, and the dimension in the width direction of the embossed pattern gradually increases or decreases from the longitudinal center to the longitudinal end. The absorbent article as described.   The absorptive article according to claim 1 or 2 in which a plurality of pairs of embossing patterns are formed in a convex shape from the central part in the longitudinal direction toward the end part in the longitudinal direction.

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