JP2003052743A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To visually apply ease in respect to back leak to a hip holding flap part at least in an absorptive article having hip holding flaps on both the rear sides of the absorptive article. SOLUTION: In a sanitary napkin having hip holding flaps HF and HF on both the rear sides respectively while interposing an absorber 4 between a liquid permeable top sheet 3 and a liquid non-permeable back sheet 2, the area of each of hip holding flaps HF is partitioned into at least two colored areas A and B having different white levels (JISP8123) in the view from a skin abutting plane side, and the white level in the colored area A adjacent to the absorber is higher than that of the other colored area (B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads for absorbing menstrual blood and vaginal discharge. An absorbent article having a flap, wherein the hip hold portion is provided with a sense of security against post-leakage.

[0002]

2. Description of the Related Art Conventionally, as absorbent articles such as panty liners, sanitary napkins and incontinence pads, liquid impermeable back sheets such as polyethylene sheets or polyethylene sheet laminated nonwoven fabrics and nonwoven fabrics or liquid permeable plastic sheets etc. It is known that an absorbent body made of cotton-like pulp or the like is interposed between the liquid-permeable top sheet and the liquid-permeable top sheet.

In recent years, various products have been proposed as the absorbent article depending on the amount of body fluid and the wearing time.
For example, in the case of a sanitary napkin for night use, in addition to the wing flaps provided on both sides in the longitudinal direction of the napkin, the hip side must be completely fixed in order to fix the underwear more completely and to prevent back leakage. In order to hold the rear part, there are flaps that extend to the side parts on both sides of the rear part (hereinafter, referred to as a flap for hip hold).

Specifically, as shown in FIGS. 5 and 6, the absorbent article (sanitary napkin) includes a liquid-impervious back sheet 52 made of a polyethylene sheet or the like,
A liquid-permeable top sheet 53 which allows menstrual blood and vaginal fluid to quickly pass therethrough, and an absorbent body 54 made of cotton-like pulp or synthetic pulp interposed between these sheets 52 and 53.
And a pair of left and right three-dimensional gathers BS, the surfaces of which are provided on both sides, and around the absorber 54, the liquid-impervious back sheet 52 is formed at the upper and lower edges thereof. An outer edge portion of the liquid-permeable top sheet 53 is joined by an adhesive such as hot melt or an adhesive means such as heat seal, and the liquid-impervious liquid that extends laterally beyond the absorber 54 at both edge portions thereof. Sex backsheet 52,
Side non-woven fabric 55 forming the three-dimensional gather BS
Are joined by an adhesive such as hot melt or an adhesive means such as heat seal, and the liquid impermeable back sheet 5
The wing-shaped flaps W, W projecting laterally are formed by the laminated sheet portion of 2 and the side non-woven fabric 55, and the hip-holding flaps HF, HF are formed on the rear side of this. ing.

Adhesive layers 56, 57, ... Are provided on the outer surfaces of the wing-shaped flaps W, W and the hip-holding flaps HF, HF, so that the sanitary napkin 50 can be worn underwear. The napkin 50 is locally applied, and the wing-shaped flaps W, W protruding laterally are brought out from the underwear, and the folding lines RL, RL at the flap base end are provided.
And wrap it around the crotch part of the underwear while sticking it to the outer surface of the crotch part of the underwear (see FIG. 7).

[0006]

Conventionally, as described above, the hip-hold flaps HF and HF are composed of a two-layer sheet in which the side non-woven fabric 55 and the liquid-impermeable back sheet 52 are bonded together. Since it has a structure that does not have a function of absorbing menstrual blood and the like, the effect of preventing leakage is not sufficient when there is a body fluid that leaks from the absorbent body 54 or leaks out through the liquid permeable top sheet 53. It was

Therefore, Japanese Patent Laid-Open No. 2000-189459 proposes an absorptive article in which the wings HF and wing absorbers are provided in the hip hold flaps HF.

Although it is true that if the wing absorber is provided, the absorption capacity of the hip-holding flaps HF and HF is dramatically increased, but the presence of the wing absorber is a liquid permeable top sheet. If it is completely visually obstructed by the wearer, the wearer may not be able to confirm its presence and may feel anxious.

Therefore, a main object of the present invention is to provide an absorbent article having a hip-holding flap on both sides of the rear part of the absorbent article, and at least the visual sense of after-leakage at the hip-holding flap portion. It is to provide an absorbent article adapted to give.

[0010]

According to a first aspect of the present invention for solving the above-mentioned problems, an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet,
Also, in the absorbent article having the hip hold flaps on both sides of the rear portion, the hip hold flap region has a whiteness (JIS P 8
There is provided an absorbent article, characterized in that it is divided into at least two or more different color regions of 123), and the whiteness of the color regions adjacent to the absorber is higher than other color regions.

According to a second aspect of the present invention, the whiteness of the color area adjacent to the absorber has a whiteness difference of 3 or more as compared with the whiteness of other adjacent color areas. The absorbent article is provided.

According to a third aspect of the present invention, there is provided the absorbent article according to any one of the first and second aspects, wherein the whiteness of the color region adjacent to the absorber is 60 or more.

According to a fourth aspect of the present invention, in the absorbent article according to any one of the first to third aspects, the gap between the outer edge of the color region adjacent to the absorber and the outline of the absorbent article is 3 mm or more. A sex article is provided.

The present invention according to claim 5 provides the absorbent article according to any one of claims 1 to 4, wherein the difference in whiteness in the hip hold flap region is imparted by coloring or embossing. .

According to a sixth aspect of the present invention, there is provided the absorbent article according to any one of the first to fourth aspects, in which the difference in whiteness in the hip-hold flap region is provided by disposing another material. It

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic Configuration] FIG. 1 is a development view of a sanitary napkin 1 according to the present invention, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. 3 is a view taken along the line III-III of FIG. It is a figure.

The sanitary napkin 1 includes a liquid-impermeable back sheet 2 made of a polyethylene sheet or the like, and a liquid-permeable top sheet 3 that allows quick passage of menstrual blood and vaginal discharge.
And an absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between these sheets 2 and 3, and this absorbent body 4
Crepe paper 5 that surrounds the absorbent body 4 in order to maintain the shape and improve the diffusibility of the absorbent body 4 and a substantially side edge portion of the absorbent body 4 as a standing base end, and at least a predetermined direction in the front-back direction from the blood discharge port corresponding portion. The liquid-impermeable back sheet 2 is mainly composed of a pair of left and right three-dimensional gathers BS, which are provided so as to project to the front surface side in the section, and around the absorbent body 4 at the upper and lower edges thereof. The outer edge portions of the liquid-permeable top sheet 3 and the liquid-permeable top sheet 3 are joined together by an adhesive such as hot melt or an adhesive means such as heat seal, and the impermeable portions that extend laterally beyond the absorber 4 at both edge portions thereof. The liquid backsheet 2 and the side nonwoven fabric 7 forming the three-dimensional gather BS are joined by an adhesive such as hot melt or an adhesive means such as heat seal, and the liquid impermeable backsheet 2 and the side. Wing-shaped flaps W projecting laterally through the laminated sheet portion by the woven cloth 7, together with W is formed, hip hold flap HF in a portion located rearward than this, HF is formed.

The structure of the sanitary napkin 1 will be described below in more detail.
A sheet material having at least water-blocking property such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of preventing stuffiness. This water-impermeable / moisture-permeable sheet material is obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet uniaxially or biaxially A sheet is preferably used. One or a plurality of adhesive layers (not shown) are formed on the non-use surface side (outer surface) of the liquid-impervious back sheet 2 so that the sanitary napkin 1 is fixed to the underwear when it is worn on the body. It has become.

Next, as the liquid-permeable top sheet 3, a perforated or non-perforated non-woven fabric, a porous plastic sheet or the like is preferably used. As the material fibers constituting the non-woven fabric, in addition to synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, polyamides, etc.,
Regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used, and a nonwoven fabric obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a meltblown method, or a needle punch method is used. be able to. Among these processing methods, the spunlace method is excellent in flexibility and drapability, and the thermal bond method is excellent in bulkiness and softness. When a large number of through holes are formed in the liquid permeable top sheet 3, menstrual blood, scents and the like (hereinafter collectively referred to as body fluids) are quickly absorbed, and the dry touch property is excellent. Will be things.

The absorbent body 4 may be any one capable of absorbing and retaining body fluid. Usually, fluffy pulp mixed with water-absorbing polymer powder is preferably used from the viewpoint of absorbing function and price. It The absorber 4 is preferably surrounded by a crepe paper 5 to maintain its shape. A plurality of embosses 6a to 6d are provided on the surface of the liquid-permeable top sheet 3 in order to hold the absorbent body, swell the surface side tightly, and contain the absorbed body fluid.

On the other hand, in the illustrated example, the width dimension of the liquid permeable top sheet 3 is set to be slightly longer than the width of the absorbent body 4 as shown in the transverse sectional views of FIGS. Four
The three-dimensional gather BS prevents the side non-woven fabric 7 different from the liquid permeable top sheet 3, specifically, menstrual blood, a stuff, etc. from permeating, or enhances the feeling of touch. According to the purpose, the non-woven fabric material is appropriately treated to be water repellent or hydrophilic. The side nonwoven fabric 7 may be made of natural fibers, synthetic fibers, regenerated fibers, or the like and is formed by an appropriate processing method. However, it is preferable to eliminate the stickiness and prevent stuffiness. Therefore, it is preferable to use a non-woven fabric having a low basis weight and breathability. Specifically, it is desirable to use a non-woven fabric having a basis weight of 18 to 30 g / m ² , and to reliably prevent the permeation of body fluids, silicone-based, paraffin-based, alkylchromic chloride-based water repellents, etc. A water repellent non-woven fabric coated with is preferably used.

As shown in FIG. 2 and FIG. 3, the side nonwoven fabric 7 has an absorbent body 4 on the outer side from the widthwise middle portion.
The side non-woven fabric 7 and the liquid impermeable back sheet 2 are bonded to each other with an adhesive such as hot melt over a range from the inner position of the absorbent body slightly beyond the side edge of the absorber to the outer edge of the liquid impermeable back sheet 2. With the laminated sheet portion, a pair of left and right wing flaps W, W are formed at a side position of the absorber substantially corresponding to a body fluid discharge port, and flaps HF, HF for hip hold are formed at a rear side position thereof. The wing-shaped flaps W, W are each provided with an adhesive layer 10 on the outer surface side, and as shown in FIG.
When attached to the shorts 30, the wing-shaped flaps W, W are folded back to the opposite side and wound around the crotch portion of the shorts to be fastened.

On the other hand, the inner portion of the side nonwoven fabric 7 is folded back in a substantially double manner, and inside the double sheet, a thread-like elasticity is fixed at the middle portion in the height direction at both ends or at appropriate positions in the longitudinal direction. The elastic member 8 is provided, and a plurality of elastic members are provided on the upper side of the thread-like elastic elastic member 8.
In the illustrated example, the two thread-like elastic stretchable members 9, 9 are arranged in a state where both ends or appropriate positions in the longitudinal direction are fixed. As shown in FIG. 3, at the front and rear ends, the double sheet portion is bonded to the absorbent body 4 side in a state where the double sheet portion is folded and laminated in a Z-shape in cross section, so that the thread-like elastic expansion / contraction member 8 is disposed. As bending points, three-dimensional gathers BS and BS that stand upright on the surface side are formed while forming pockets with an opening facing inward in a V-shaped cross section.

[Hip hold flap HF] In the present invention, in the hip hold flap HF portion,
The structure is such that it visually appeals for the presence of the absorbing element so as to give a sense of security against the leakage.

Specifically, the hip hold flap HF region has a whiteness (JIS P 812) as viewed from the skin contact surface side.
The color area A, which is divided into at least two or more color areas A and B of 3) and adjacent to the absorber 4, has a higher whiteness than the other color areas (B).

The whiteness (JIS P 8123) is measured by a Hunter whiteness tester, and is the relative reflectance of a sample to a standard magnesium oxide plate when irradiated with light in the blue-violet portion of the spectrum. Shown. If the hip-hold flap HF area is at least a color area portion adjacent to the absorbent body 4, that is, if there is a body fluid leaking from the absorbent body 4 or oozing out through the liquid permeable top sheet 3, it is as if Are divided into an area (A) having a predetermined whiteness that can be expected to be absorbed, and an area (B) adjacent to this area and having a relatively low whiteness.

In this case, the whiteness of the color area A adjacent to the absorber 4 is 3 or more as compared with the whiteness of another adjacent color area B, preferably 10 or more. It is desirable to have If there is not such a difference in whiteness, it is not possible to clearly confirm the existence of a substance that is expected to absorb body fluid or the like in that portion.

The whiteness of the color area A adjacent to the absorber 4 is preferably 60 or more. When the whiteness of the color area A adjacent to the absorber 4 is 60 or more,
The recognition tendency that what exists in the color region A is an absorbing element becomes high. It should be noted that the color region A portion includes a case where an absorber or the like is present and actually exerts an absorbing effect, and a case where the absorber is not present and actually does not have an absorbing effect. That is, it is most desirable to dispose a member having an absorbing function such as an absorber or crepe paper in the color area A.
Even if the wearer does not have the absorbing function and is merely colored, the wearer can feel a sense of security against the rear leakage.

First, as a first method of giving a predetermined whiteness to the color area A, the color areas A and B are colored by different whiteness in the production of the liquid-impervious back sheet 2. Alternatively, as shown in FIG. 3, the manufacturing in-line is provided on the surface side of the liquid-impermeable back sheet 2 (on the side where the absorbent body 4 is disposed) and including the color area A. Or give a color by inkjet,
Alternatively, a method of displaying white color by embossing can be cited. In the embossing, fine dot-like embossing is provided at a high density, and the liquid-impervious backsheet 2 made of a plastic sheet is finely dotted with local plastic regions (whitening due to extreme elongation) to obtain whiteness. Try to raise. The first method, so to speak, falsely misidentifies the presence of the absorbing element in the portion of the color region A, but at least the wearer can feel a sense of security at the time of wearing due to the false recognition of the presence.

Next, as a second method, as shown in FIG. 4, another material 11 is arranged on the surface side of the liquid-impermeable back sheet 2 in order to actually increase the whiteness of the color area A. The method of setting can be mentioned. As the different material 11, for example, a non-woven fabric having a whiteness of 60 or more, crepe paper, pulp, high-quality paper, polyethylene film, polypropylene film and the like can be preferably used. Of these separate materials 11, it is preferable to use hydrophilically treated non-woven fabric, crepe paper, pulp or the like which actually has an absorbing effect.

On the other hand, regarding the formation range of the color area A, when the color area A with high whiteness is close to the outer edge of the product,
In order to remind the user of leakage, it is desirable that the separation width D between the outer edge of the color region A adjacent to the absorbent body 4 and the outline of the sanitary napkin 1 is 3 mm or more.

By the way, the formation mode of the hip hold flap HF is arbitrary. For example, as in this example, it is generally formed by the liquid-impermeable back sheet 2 and the side nonwoven fabric 7. However, when the three-dimensional gather BS is not provided, the liquid-permeable top sheet 3 is used as the product outer edge. It may be formed by adhering to the liquid-impervious back sheet 2 and extending up to. Further, only the liquid-impermeable backsheet 2 may be extended and formed, or only the side nonwoven fabric 7 or the liquid-permeable topsheet 3 may be extended and formed. Further, another sheet piece may be attached and formed.

[0034]

EXAMPLE As shown in FIG. 8, a sheet A resembling a liquid impermeable back sheet 2, a sheet B resembling another material 11 and a sheet C resembling a liquid permeable top sheet 3 are shown in FIG. The sheets A to C are laminated as shown, the laminated portion of the sheets A to C is the A surface (color area A), the laminated portion of the sheets A and C is the B surface (color area B), and the whiteness of the A surface and the B surface are Sensory evaluation was performed based on the difference in whiteness from the whiteness. The whiteness was measured with a Hunter-type whiteness meter (manufactured by Nippon Denshoku Kogyo) according to JIS P 8123, and the sensory evaluation was performed by 20 female monitors for the sense of security of the hip hold part. The evaluation was made into four grades: ⊚: very reassuring, ∘: reassuring, Δ: somewhat reassuring, ×: unsure or not reassuring. The results are shown in Table 1.

[0035]

[Table 1] From Table 1, it was found that a sense of security can be obtained when the difference in whiteness is approximately 3 or more, and a very high sense of security can be sensorially obtained when the difference in whiteness is 6 or more, preferably 15 or more.

[0036]

As described above in detail, according to the present invention, in the absorbent article having the hip hold flaps on both sides of the rear part of the absorbent article, after-leakage occurs at least visually in the hip hold flap portion. You will be able to give a sense of security to.

[Brief description of drawings]

FIG. 1 is a development view of a sanitary napkin 1 according to the present invention.

FIG. 2 is a cross sectional view thereof (a view taken along the line II-II in FIG. 1).

FIG. 3 is a diagram showing an example of a method for giving a predetermined whiteness to the hip-hold flap HF (a view taken along the line III-III in FIG. 1).

FIG. 4 is a diagram showing another example of a method for giving a predetermined whiteness to the hip-holding flap HF (a view taken along the line III-III in FIG. 1).

FIG. 5 is a development view of a conventional sanitary napkin.

FIG. 6 is a cross-sectional view thereof (a view taken along the line VI-VI in FIG. 5).

FIG. 7 is a perspective view showing a mounted state of a napkin.

FIG. 8 is a diagram showing a test piece manufacturing procedure in an example.

[Explanation of symbols]

1 ... Sanitary napkin, 2 ... Liquid-impermeable backsheet, 3 ...
Liquid-permeable top sheet, 4 ... Absorber, 5 ... Crepe paper, 7
… Side nonwoven fabric, BS… Three-dimensional gather, W… Wing flap, HF… Hip hold flap

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C003 BA07 BA08 CA01 CA06 FA01                       HA05                 4C098 AA09 CC14 CC37 CE08 DD10                       DD25 DD30

Claims (6)

[Claims] 1. An absorbent article in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and which has hip-holding flaps on both sides of a rear portion of the back hold. The flap region for use is divided into at least two or more color regions having different whiteness (JIS P 8123) when viewed from the skin contact surface side, and the whiteness of the color region adjacent to the absorber is higher than that of other color regions. An absorbent article characterized by being also higher. 2. The whiteness of a color area adjacent to the absorber is
The absorbent article according to claim 1, which has a whiteness difference of 3 or more in comparison with the whiteness of another adjacent color region. 3. The whiteness of a color area adjacent to the absorber is
The absorbent article according to any one of claims 1 and 2, which has a number of 60 or more. 4. The gap between the outer edge of the color region adjacent to the absorber and the outline of the absorbent article is 3 mm or more.
The absorbent article according to any one of to 3. 5. The absorbent article according to claim 1, wherein the whiteness difference in the hip hold flap region is imparted by coloring or embossing. 6. The absorbent article according to claim 1, wherein the difference in whiteness in the hip-hold flap region is provided by disposing another material.