JP7291022B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

Absorbent articles generally comprise a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent core disposed between the topsheet and the backsheet. It is necessary to increase the absorption capacity of the absorbent article in order to cope with frequent urination when worn for a long period of time or when a large amount of urine is urinated at one time.

In the absorbent article of Patent Document 1, the back surface of the surface material has more of the liquid film-cleaving agent than the front surface, and a plurality of concave portions formed by integrating the surface material and the absorbent body are formed in the liquid receiving area on the surface material. formed to improve liquid absorption performance.

The absorbent article of Patent Document 2 has an opening on the non-skin side of the absorbent body and a hollow portion having a bottom portion on the skin side. It is configured to contain a deodorant, thereby improving the deodorant performance.

JP 2019-000482 A JP 2019-025305 A

However, in order to increase the absorption amount, it is common to increase the amount of the absorbent, but the increase in the amount of the absorbent leads to an increase in the area and thickness of the absorbent, which in turn increases the size and thickness of the absorbent article. end up The problem of increasing the size and thickness of the absorbent article is that it makes the absorbent article less wearable and less comfortable, especially in the case of mild to moderate urinary incontinence where the wearer is able to walk and be active. There is

Another method to increase absorption is to increase the amount of superabsorbent polymer. , there is also a problem that urine leakage is likely to occur.

Furthermore, some absorbent articles having a large absorption amount are deodorized against odors caused by long-term wear. Generally, as a deodorizing measure, there are many methods of providing a deodorizing sheet over the entire surface of the absorbent body, but there is also the problem that the deodorizing effect is limited to the periphery of the urination area and the performance of the entire deodorizing sheet is not utilized.

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 having excellent absorption performance and deodorant performance.

The inventors of the present invention conducted extensive research in view of the above problems. As a result, the present inventors have found that the above problems can be solved by providing the absorbent body with a folding portion, 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 topsheet, a liquid-impermeable backsheet, and an absorbent fiber and a superabsorbent polymer between the topsheet and the backsheet. An absorbent article comprising an absorbent body, wherein the absorbent body has a folded portion having a shape in which the central portion in the width direction is folded multiple times along the longitudinal direction, and the folded portion is folded around the periphery. The absorbent article has deodorant means which is thicker and taller than the non-bent portion and which is disposed over substantially the entire surface of the folded portion.

(2) In the configuration of (1) above, the folded portion has a width of 1 mm or more and 10 mm or less for one folded portion, and an overall width of 10 mm or more and 300 mm or less.

(3) In the configuration of (1) or (2) above, the height of the folded portion is higher than the surrounding unfolded portion within a range of 1 mm or more and 20 mm or less.

(4) In the configuration of any one of (1) to (3) above, the length in the longitudinal direction of the folded portion is 50% or more of the total length of the absorbent body.

ADVANTAGE OF THE INVENTION According to this invention, the absorbent article excellent in absorption performance and deodorant performance can be provided.

1 is a plan view of an absorbent article 1 according to an embodiment of the present invention, viewed from the top sheet 10 side. FIG. FIG. 2 is a cross-sectional view along X1-X1 of the absorbent article 1 of FIG. 1; It is a figure explaining the use condition of the absorbent article 1 which concerns on embodiment of this invention.

Modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail below, but these are given for the purpose of illustration and are not intended to limit the present invention. In addition, the same code|symbol is attached|subjected to the same element through the whole description of embodiment.

Moreover, in the description of this specification, when the absorbent article 1 is worn means at least one of when the absorbent article 1 is worn and after the absorbent article 1 is worn. The longitudinal direction of the absorbent article 1 is the direction across the front and back of the wearer when the absorbent article 1 is worn, and is the direction indicated by symbol Y in the drawing. Moreover, the width direction of the absorbent article 1 is a direction that is transverse or perpendicular to the longitudinal direction, and is the direction indicated by symbol X in the drawing. Furthermore, the skin-contacting surface is the surface of the front and back surfaces of each member such as an absorbent body, which is arranged on the wearer's skin side when worn, and the non-skin-contacting surface is each member such as an absorbent body. Of the front and back sides of the , the side facing away from the wearer's skin when worn. Body fluids refer to liquids excreted from the body to the outside of the body, such as urine, blood, and water in loose stools. Furthermore, the absorbent article 1 is an absorbent article that is fixed inside a paper diaper and used as an auxiliary pad. A stop type paper diaper or the like may be used.

<Absorbent article>
FIG. 1 is a plan view of an absorbent article 1 according to an embodiment of the present invention viewed from the top sheet 10 side, and FIG. 2 is a cross-sectional view of the absorbent article 1 taken along line X1-X1 in FIG. Moreover, FIG. 3 is a figure explaining the use condition of the absorbent article 1 which concerns on embodiment of this invention.
As shown in FIGS. 1 to 3, the absorbent article 1 is divided into a front portion 2, a rear portion 3, and an excretion portion 4 between the front portion 2 and the rear portion 3. As shown in FIGS. The absorbent article 1 comprises a liquid-permeable topsheet 10 arranged on the skin-contacting side and a liquid-impermeable backsheet arranged on the non-skin-contacting side facing the topsheet 10. 20, an absorbent body 30 arranged between the top sheet 10 and the back sheet 20, and a deodorizing sheet (deodorizing means) 40. Thereby, the absorbent body 30 has a structure sandwiched between the top sheet 10 and the back sheet 20 . This absorbent article 1 is excellent in absorption performance and deodorant performance.

The longitudinal length L1 of the absorbent article 1 is preferably 430 mm or more and 550 mm or less.

In order to prevent lateral leakage of bodily fluid excreted by the wearer, the absorbent article 1 has a pair of three-dimensional gather elastic members on the top sheet 10 along the longitudinal direction of the absorbent article 1 . Gathers 14 may be provided. The outer ends of the three-dimensional gathers 14 in the width direction of the absorbent article 1 are fixed to the back sheet 20, the inner ends are fixed to the top sheet 10, and the center is a free end that is not fixed to the top sheet 10. A three-dimensional gather sheet is arranged. By providing the three-dimensional gathers elastic member along the longitudinal direction, the three-dimensional gathers 14 can stand upright and can be deformed according to the body shape of the wearer. As the three-dimensional gather elastic member 16, for example, a thermal bond nonwoven fabric, a spunbond nonwoven fabric, a polyethylene film, or a sheet obtained by combining and bonding these sheets can be used. From the standpoint of strength and workability, the fabric weight of the three-dimensional gathers 70 is preferably 10 g/m ² or more and 30 g/m ² or less.

<Top sheet>
The top sheet 10 may be formed from a liquid-permeable base material that allows body fluids to move to the absorbent body 30. For example, known hydrophilic nonwoven fabrics such as thermal bond nonwoven fabrics and spunbond nonwoven fabrics can be used. . In addition, the surface of the top sheet 10 may be embossed or perforated in order to improve liquid permeability. As a method for applying these embossing and perforating processes, known methods can be implemented without limitation. In order to reduce irritation to the skin, the top sheet 10 may contain a lotion, an antioxidant, an anti-inflammatory ingredient, a pH adjuster, an antibacterial agent, a moisturizing agent, and the like.

The basis weight of the top sheet 10 is preferably 18 g/m ² or more and 400 g/m ² or less in terms of strength, processability, and liquid return amount. The shape of the top sheet 10 is not particularly limited as long as it covers the entire absorbent core 30, which is necessary for guiding bodily fluids to the absorbent core 30 without leakage.

<Back seat>
The back sheet 20 may be formed using a liquid-impermeable base material that does not allow the body fluid retained by the absorbent body 30 to wet the clothes, and is breathable or non-breathable liquid-impermeable. of plastic film can be used.

From the viewpoint of strength and workability, the basis weight of the backsheet 20 is more preferably 15 g/m ² or more and 40 g/m ² or less. In order to make the back sheet 20 air-permeable, for example, a filler may be added to the base resin film, or the back sheet 20 may be embossed. Calcium carbonate can be used as a filler, and a known method can be used without limitation as a method for blending the filler.

<Absorber>
An absorbent body 30 is disposed between the topsheet 10 and the backsheet 20 and comprises absorbent fibers and superabsorbent polymers (SAP).

(absorbent fiber)
The absorbent body 30 contains absorbent fibers as a base material and a superabsorbent polymer.
Absorbent fibers are not particularly limited as long as they are generally used in absorbent articles such as incontinence products and incontinence pads. Examples include fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, and hydrophilic nonwoven fabric. etc. can be mentioned. Among these, fluff pulp is preferably used from the viewpoint of absorbability. Examples of fluff pulp include wood pulp (for example, bleached softwood kraft pulp (N-BKP) such as southern pine and Douglas fir), synthetic fiber, resin fiber, non-wood pulp, etc., which are defibrated into cotton. can. When fluff pulp is used as the absorbent fiber as the base material of the absorbent body 30, the basis weight of the absorbent fiber is preferably in the range of 100 g/m ² to 800 g/m ² . As a result, more bodily fluids can be absorbed without impairing the feel of the skin.

(super absorbent polymer)
The superabsorbent polymer (SAP) of the absorbent body is not particularly limited as long as it can absorb body fluids and prevent backflow, and may be sodium polyacrylate, polyaspartate, (starch-acrylic ) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers and saponified products thereof. Among these, the sodium polyacrylate type is preferable from the viewpoint of the absorption amount per weight.

The basis weight of the superabsorbent polymer contained in the absorbent body 30 is preferably in the range of 50 g/m ² or more and 500 g/m ² or less. Moreover, the weight percentage of the superabsorbent polymer with respect to the total weight of the absorbent body 30 is preferably 15 to 50%. By setting the basis weight and weight percent of the superabsorbent polymer within the above numerical ranges, gel blocking in the absorbent body 30 can be prevented and a large amount of body fluid can be absorbed in the absorbent body 30 .
In addition, in the absorbent body, the absorbent fibers and the superabsorbent polymer are preferably in the form of a laminated mat formed by mixing SAP particles in the absorbent fibers.

<Deodorizing sheet>
The deodorant sheet 40 is provided between the top sheet 10 and the absorbent body 30 and arranged on the folded parts 31 to 37 of the absorbent body 30 . It is preferable that the deodorant sheet 40 is arranged so as to cover at least the folded portions 31 to 37 of the absorbent body 30 . The deodorant sheet 40 is composed of a deodorant component such as activated carbon, metal-supported zeolite, or the like.

(Folded portion of absorber)
As shown in FIG. 2, the absorber 30 is formed with a folded portion 30a having a shape in which the central portion in the width direction is folded multiple times along the longitudinal direction. The folded portion 30a is composed of upwardly convex folded portions 31, 32, 33 and 34 and downwardly convex folded portions 35, 36 and 37. As shown in FIG. Spaces are formed between the folds 31 to 37 by the folds 31 to 37 .
The height h1 of the folded portion 30a is configured to be thicker and higher than the height h2 of the surrounding unfolded portion.

The total width of the folded portion 30a is preferably 10 mm or more and 300 mm or less, and particularly preferably 30 mm or more and 200 mm or less. The width of each folded portion 31 to 37 of the folded portion 30a is preferably 1 mm or more and 10 mm or less, and particularly preferably 2 mm or more and 8 mm or less.

The height h1 of the folded portion 30a is preferably higher than the height h2 of the surrounding unfolded portion within a range of 1 mm or more and 20 mm or less, and particularly preferably within a range of 2 mm or more and 15 mm or less. That is, h1-h2 is preferably in the range of 1 mm or more and 20 mm or less.

It is preferable that the length L1 of the folded portion 30a in the longitudinal direction is 50% or more of the total length of the absorbent body (see FIG. 1).
A deodorizing sheet, which is the deodorizing means 40, is arranged so as to entirely cover the folded portion 30a over substantially the entire surface of the folded portion 30a.

According to the absorbent article 1 of the present embodiment, a plurality of spaces in the longitudinal direction are formed by the folded portions 31 to 37 between the folded portion 30a and the deodorizing sheet 40, so that the urine absorbed by the urination portion 4 can be Warm odors generated from can be diffused in the longitudinal direction.

In addition, as shown in FIG. 3, when the paper diaper is worn, the front and rear sides in the longitudinal direction of the paper diaper are positioned vertically above the excretion portion 4, which is the central portion. It can be propagated to the deodorant sheet in the region where urine is not absorbed in the longitudinal direction, and the deodorant effect can be efficiently exhibited. Therefore, the effect is utilized over the entire deodorizing sheet 40, and the absorbent article 1 having excellent deodorizing performance is obtained.

In addition, the amount of absorbent material in the folded portions 30a is larger than that in the surroundings, so that the absorbent article 1 having excellent absorption performance can be obtained.

Furthermore, when absorbing a large amount of urine, urine is diffused in the longitudinal direction due to the uneven three-dimensional shape formed along the longitudinal direction of the folded part 30a of the absorbent article, so that the ability of the absorbent is effectively utilized. It becomes possible to obtain the absorbent article 1 having excellent absorption performance.
Furthermore, the folded part 30a is in close contact with the crotch part of the wearer to improve absorbency and reduce leakage. , an absorbent article 1 excellent in wearing feeling can be obtained.

1 Absorbent Article 10 Top Sheet 20 Back Sheet 30 Absorber 30a Folded Part 31 to 37 Folded Part 40 Deodorant Sheet

Claims (4)

An absorbent article comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body containing absorbent fibers and a superabsorbent polymer between the topsheet and the backsheet,
The absorbent body has a folded portion having a shape in which the central portion in the width direction is folded multiple times along the longitudinal direction,
The folded portion is thicker and higher than the surrounding unfolded portion,
A deodorant sheet is provided on substantially the entire surface of the folded portion,
The absorbent article, wherein the deodorant sheet is arranged between the folded portion and the top sheet, and forms a plurality of longitudinally extending spaces between the folded portion and the folded portion for circulating odor. The folded part has a width of 1 mm or more and 10 mm or less for one folded part, and an overall width of 10 mm or more and 300 mm or less.
The absorbent article according to claim 1, characterized by: The height of the folded part is higher than the surrounding unfolded part in the range of 1 mm or more and 20 mm or less,
3. The absorbent article according to claim 1 or 2, characterized in that: The length in the longitudinal direction of the folded part is 50% or more of the total length of the absorbent body,
The absorbent article according to any one of claims 1 to 3, characterized in that:

Images