JP2018000332A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which improves followability with respect to exercises when the absorbent article is worn without giving a wearer anxiety about leakage.SOLUTION: In 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 absorber consists of two layers of an upper layer absorber and a lower layer absorber, and is provided with at least two channel embossments extending in a longitudinal direction of the absorbent article from the top sheet to the upper layer absorber. A part of the lower layer absorber where the channel embossments are provided is provided with absorber slits.SELECTED DRAWING: Figure 1

Description

  The present invention relates to absorbent articles such as light incontinence pads and liners.

  With the aging of society and increasing health consciousness, an increasing number of active elderly people are expected in recent years. Absorbent articles such as light incontinence pads and liners used by elderly people are mostly those that can absorb a relatively large amount of body fluid. Correspondingly, the thickness of the absorbent article must be thick. I don't get it. However, wearing such thick absorbent articles may cause problems when used by active elderly people, such as making the elderly feel uncomfortable during activities. .

  For example, Patent Document 1 discloses an absorbent article that includes a top sheet, a back sheet, and an absorber. A recess forming region defined by one or more recesses recessed toward the back sheet side is formed on the top sheet side of the rear region, and this recess forming region is a rear end portion in the longitudinal direction. An absorbent article is disclosed in which the length in the width direction perpendicular to the longitudinal direction becomes shorter from the side toward the center in the longitudinal direction.

JP 2006-083185 A

  However, in the absorbent article of Patent Document 1, in order to improve the followability to the movement of the absorbent article, a low basis weight area is provided in a partial area of the absorbent body. Since it exists in the condition which can be visually recognized from the top sheet side of an absorbent article, it is easy to give the wearer of an absorbent article the anxiety with respect to the leak of a bodily fluid. Therefore, the present invention has been made in view of the above problems, and has improved absorbability with respect to exercise when wearing absorbent articles without giving the wearer anxiety about leakage. The purpose is to provide goods.

  The inventors of the present invention have conducted extensive research in view of the above problems. As a result, an absorbent article having an absorbent body composed of two layers of an upper layer absorbent body and a lower layer absorbent body, and having at least two channel embossments extending from the top sheet to the upper layer absorbent body in the longitudinal direction of the absorbent article And the present invention has been completed by finding that the above-mentioned problems can be solved by providing an absorber slit in a portion of the lower layer absorber where channel embossing is provided. Specifically, the present invention provides the following.

  (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. The absorber comprises two layers of an upper layer absorber and a lower layer absorber, and is provided with at least two channel embosses extending in the longitudinal direction of the absorbent article from the top sheet to the upper layer absorber. The absorbent article is characterized in that an absorber slit is provided at a portion of the body where the channel embossing is provided.

  (2) A second aspect of the present invention is the absorbent article according to (1), characterized in that the dimension in the width direction of the absorber slit is 3 mm or more and 10 mm or less.

  (3) A third aspect of the present invention is the absorbent article according to (1) or (2), wherein the interval between at least two channel embosses extending in the longitudinal direction is 15 mm or more and 50 mm or less. It is characterized by.

  (4) A fourth aspect of the present invention is the absorbent article according to any one of (1) to (3), wherein two channel embossments are convex curves toward the center line in the width direction. It is characterized by becoming.

  In the absorbent article of the present invention, the absorbent body is composed of two layers of an upper layer absorbent body and a lower layer absorbent body, and channel embossing is provided from the top sheet to the upper layer absorbent body. The absorber slit is provided in the site | part in which the channel embossing is provided. Therefore, the absorber slit provided in the lower layer absorber becomes less visible due to the presence of the upper layer absorber covering the upper portion of the lower layer absorber, and the channel embossment provided in the upper layer absorber and the top sheet, and the absorber. The effect of the slit on the design of the absorbent article can be minimized, and the wearer can be made aware of the anxiety about leakage that accompanies the recognition of the existence of the low basis weight part. There is nothing. On the other hand, since the absorbent article of the present invention has at least two absorber slits extending in the longitudinal direction, the followability of the absorbent article during exercise is significantly improved.

It is the top view and sectional drawing of the absorptive article of the present invention.

  Hereinafter, with reference to drawings, the absorptive article 1 concerning the embodiment of the present invention is explained in detail. 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. Furthermore, 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. 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 contact 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 contact side surface is the wear of the absorbent article 1. Sometimes refers to the surface that abuts the wearer's clothing. In this specification, the body contact side surface side of the absorbent article 1 may be referred to as the upper side, and the clothing contact side surface side may be referred to as the lower side.

<Absorbent article>
FIG. 1 is a plan view and a cross-sectional view of an absorbent article 1 of the present invention. The absorbent article 1 of the present invention includes a liquid-permeable top sheet 10, a liquid-impermeable back sheet 30, and an absorbent body 20 disposed between the top sheet 10 and the back sheet 30.

[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 may be laminated with a plurality of layers, and a large number of through holes may be formed to impart dry touch properties.

The nonwoven fabric was obtained by a known processing method such as a spunlace method or a spunbond method in addition to a thermal bond method using synthetic fibers such as polyethylene or polypropylene, recycled fibers such as rayon, and natural fibers such as cotton. Things can also 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 center in the longitudinal direction where the wearer's crotch is positioned, and is slightly outward from the side edge of the absorbent body 20. It may extend and be provided.

[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 may be provided on the clothing contact side surface of the back sheet 30. When the absorbent article 1 has an adhesive layer, the absorbent article 1 may have a release sheet for protecting the adhesive layer, and the release sheet may be integrated with the packaging sheet of the absorbent article 1. . 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 absorbent body 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.

  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.

  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. In the case where a plurality of carrier sheets are provided, the base material of the carrier sheet may be the same or different.

  The absorber 20 used in the present invention is formed by laminating an upper layer absorber 21 and a lower layer absorber 22. Here, the dimension of the upper layer absorber 21 and the lower layer absorber 22 in the longitudinal direction and the width direction may be such that the size of the upper layer absorber 21 is larger than that of the lower layer absorber 22, and the dimension of the upper layer absorber 21 is lower layer absorption. The size of the body 22 may be the same, and the size of the upper layer absorber 21 may be smaller than the size of the lower layer absorber 22.

The basis weight of the upper layer absorbent body 21 is preferably 50 g / m ² or more and 600 g / m ² or less, and more preferably 100 g / m ² or more and 500 g / m ² or less. The basis weight of the lower layer absorbent body 22 is preferably 200 g / m ² or more and 1000 g / m ² or less, and more preferably 250 g / m ² or more and 900 g / m ² or less. By making the basis weight of the upper layer absorbent body 21 and the lower layer absorbent body 22 within the above range, the followability to the wearer's movement can be effectively improved without impairing the absorbent performance of the absorbent article 1. Can do. In addition, it is preferable that the basic weight ratio with respect to the lower layer absorber of an upper layer absorber is 25% or more and 60% or less.

[Channel embossing]
In the absorbent article 1 of the present invention, at least two channel embosses 23 extending in the longitudinal direction of the absorbent article 1 are formed from the top sheet 10 to the upper layer absorbent body 21. The depth of the channel emboss 23 is preferably 3 mm or more and 20 mm or less, and more preferably 3 mm or more and 15 mm or less. In addition, the interval in the width direction of the two channel embossings 23 extending in the longitudinal direction is preferably 15 mm or more and 50 mm or less at the closest position when the two channel embossments 23 are not connected to each other. More preferably, it is 40 mm or less.

  Each of the pair of channel embosses 23 may be formed as a convex curve toward the center line in the width direction, may be formed as a convex curve toward the outer side in the width direction, and are parallel to each other. Although it may be linear, in order to improve the followability of the absorbent article 1 with respect to exercise by the wearer, the portion where the wearer's crotch is positioned is the narrowest in the center line in the width direction. A convex shape is preferred. In addition, the channel embossing 23 may be connected to each other at at least one end in the longitudinal direction, and may be in the form of an oval as a whole without the two channel embossing 23 being connected to each other. It may be completely separated.

  By forming the channel embossing 23 along the longitudinal direction with respect to the absorbent article 1, the body fluid excreted on the top sheet 10 is diffused along the channel embossing 23 in the longitudinal direction. 1 can increase the absorption area of the body fluid by 1 and improve the absorption performance of the absorbent article 1, and can effectively improve the followability to the movement of the absorbent article 1.

[Absorber slit]
In the absorbent article 1 of this invention, the absorber slit 24 which penetrates the lower layer absorber 22 is provided in the site | part in which the said channel embossing 23 is provided of the lower layer absorber 22. As shown in FIG. Thus, by providing the absorber slit 24 in the lower layer absorber 22, the presence of the absorber slit 24 cannot be visually recognized due to the presence of the upper layer absorber 21 and the channel emboss 23, and the wearer absorbs it. Since the presence of the absorber slit 24 cannot be visually recognized from the top sheet 10 side of the absorbent article 1, the design of the absorbent article 1 is not impaired, the wearer is not worried about leakage, and the absorber slit 24 is a movable part. As a result, it is possible to improve the followability to the movement of the absorbent article 1.

  The width direction dimension of the absorber slit 24, that is, the slit width is preferably 3 mm or more and 10 mm or less, and more preferably 5 mm or more and 10 mm or less. By setting the size of the absorbent slit 24 in the width direction within the above range, the followability to the movement of the absorbent article 1 can be improved without impairing the absorbent performance of the absorbent article 1.

  The absorber slits 24 may be formed over the entire region where the channel embossing 23 is formed, or may be formed only for a part thereof, but may be formed symmetrically. preferable. In particular, when the channel embossing 23 is not connected to each other at both ends in the longitudinal direction, the absorber slit 24 is preferably formed in the entire region where the channel embossing 23 is formed. In the case where they are connected to each other at both ends in the longitudinal direction, it is preferable that the absorber slits 24 are not formed only at both ends in the longitudinal direction. By employ | adopting such a structure, the area | region enclosed by the absorber slit 24 of the lower layer absorber 22 is fixed to the other area | region of the lower layer absorber 22, and the shape stability of the absorbent article 1 is enough. Maintained.

[Second seat]
In the absorbent article 1, the second sheet 15 may be disposed between the top sheet 10 and the absorbent body 20. By disposing the second sheet 15 between the top sheet 10 and the absorbent body 20, the transfer of body fluid from the top sheet 10 side to the absorbent body 20 is promoted, and the absorbent performance of the absorbent article 1 is improved. In addition, the backflow of the absorbed body fluid is effectively prevented, and the top sheet 10 can be maintained in a dry state. The second sheet 15 is made of a fiber material, and is preferably made of a thermal bond nonwoven fabric that is an air-through nonwoven fabric. In addition, the fiber material constituting the second sheet 15 is preferably subjected to a hydrophilic treatment. Such a hydrophilization treatment maximizes the function of transferring body fluid to the absorbent body 20.

  The fiber material constituting the non-woven sheet that is the second sheet 15 is polypropylene, polyethylene, or polyester; composite fiber made of two or more materials such as polyester, polypropylene, polyethylene, or the like; natural fiber such as cellulose fiber, or a mixture thereof However, a composite fiber of low melting point polyester and polyester, polyester and polyethylene, or polypropylene and polyethylene is preferable from the viewpoint of strength and bulkiness. In the present invention, among these, it is preferable to use a composite fiber made of polyethylene and polypropylene, or a composite fiber made of polyethylene and polyester. Here, the composite fiber refers to a multi-component fiber in which one fiber is configured from at least two component fiber materials. From the arrangement of each fiber material, a sheath-core type, a parallel type, a sea-island type, a split type And so on. Among these, it is particularly preferable to use a sheath-core type composite fiber as the fiber material constituting the nonwoven sheet that is the second sheet 15, and by applying hot air after forming the nonwoven fabric from such a composite fiber. A bulky nonwoven fabric can be obtained. In addition, as a hydrophilic processing method of a fiber and a composite fiber, the method of processing by apply | coating a hydrophilic agent to a fiber and a composite fiber, or spray-applying and impregnating the manufactured 2nd sheet | seat 15 is mentioned.

The basis weight of the non-woven fabric constituting the second sheet 15 is preferably 15 g / m ² or more and 50 g / m ² or less, and more preferably 20 g / m ² or more and 45 g / m ² or less. By setting the basis weight of the second sheet 15 within the above range, the bulkiness of the second sheet 15 can be sufficiently maintained, and the absorbent performance and reversibility of the absorbent article 1 can be further improved.

  The second sheet 15 preferably covers all or part of the upper surface of the absorbent body 20.

[Three-dimensional gather]
A solid gather may be provided on the body contact side surface of the absorbent article 1. The three-dimensional gather forms a body fluid confinement space together with the top sheet 10 so as to prevent side leakage of the body fluid. 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 restriction | limiting in particular as a manufacturing method of the absorbent article 1, A conventionally well-known method is employable. For example, if necessary, a liquid diffusable sheet and a three-dimensional gather are disposed on the top sheet 10 in advance, and the second sheet 15 and the absorbent body 20 are sandwiched between the top sheet 10 and the back sheet 30. At this time, the absorber 20 is composed of an upper layer absorber 21 and a lower layer absorber 22, and an absorber slit 24 is formed in the lower layer absorber 22 along a predetermined shape. Then, the top sheet 10 and the back sheet 30 are fixed partially or entirely using a hot melt adhesive, heat embossing, ultrasonic embossing, high frequency embossing, etc. It can be manufactured by forming the emboss 23. Finally, after individually packaging it in a packaging sheet, it may be folded into three in the longitudinal direction.

  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 improvement to said embodiment. It will be apparent to those skilled in the art that 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 10 Top sheet 20 Absorber 21 Upper layer absorber 22 Lower layer absorber 23 Channel embossing 24 Absorber slit 30 Back sheet

Claims (4)

In 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 absorber consists of two layers, an upper layer absorber and a lower layer absorber,
At least two channel embossments extending in the longitudinal direction of the absorbent article are provided from the top sheet to the upper layer absorbent body,
An absorbent article, wherein an absorber slit is provided in a portion of the lower layer absorber where the channel embossing is provided.   The absorptive article according to claim 1 whose size of the width direction of an absorber slit is 3 mm or more and 10 mm or less.   The absorbent article according to claim 1 or 2, wherein a distance between at least two channel embosses extending in the longitudinal direction is 15 mm or more and 50 mm or less.   The absorptive article according to any one of claims 1 to 3 in which two channel embossing becomes a convex curve toward a width direction central line.

Images