JPH10295724A - Absorptive article for body fluid treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve body fluid absorptivity and skin adhesiveness of an absorptive article, by constituting a second flap by two air permeable fiber layers made of thermoplastic synthetic fiber of specific denier and an air permeable fiber layer made of thermoplastic synthetic fiber extremely thinner than the fiber in the two layers and having high water pressure resistance and integrally put in between the two fiber layers. SOLUTION: A second flap 10 placed on each upper face of both side flaps is constituted of nonwoven fabric 11. The nonwoven fabric 11 is constituted by integrally putting a third fiber layer in between air permeable first and second fiber layers made of thermoplastic synthetic fiber not thinner than 1 denier. The third fiber layer is constituted of extremely thin thermoplastic synthetic fiber not thicker than the denier of the fiber used in the first and second fiber layers 11a, 11b. The water pressure resistance of the third fiber layer is made higher than that of the first and second fiber layers and the third fiber layer is made air permeable. This constitution makes liquid resistance be improved, side leaks and penetration be prevented, and strength and feeling be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article for treating body fluids, and more particularly, to an absorbent article such as a napkin or pad for absorbing and retaining the menstrual blood of women and a female incontinence pad.

[0002]

2. Description of the Related Art Conventionally, for example, in a napkin that absorbs and retains menstrual blood of a woman, a flap having liquid resistance (or barrier property) is arranged on the opposite side of the napkin. Many things are known.

[0003] However, the flap is made of a moisture-impermeable plastic sheet through which bodily fluids easily flow on the surface thereof, or has a moisture-permeable property, but is inferior in liquid-impermeable property and / or is caused by a wearer's crotch. It is composed of a nonwoven fabric that is easily fluffed by friction and further breaks, or is composed of a composite sheet of a relatively rigid plastic film and a nonwoven fabric that is easy to adhere to the wearer's crotch and that is difficult to adhere to. Was.

[0004] The preferred performance of the flap is that bodily fluids flow too much on the surface and do not leak laterally;
It is relatively impermeable to bodily fluids, relatively not easily fluffed or damaged by friction caused by the wearer's crotch, and gently adheres to the wearer's crotch skin.

[0005] It is an object of the present invention to provide an absorbent article for treating body fluid, which has the above-mentioned preferable performance and can solve the above-mentioned drawbacks.

[0006]

According to the present invention, there is provided a laminated panel having a skin contact surface and a non-skin contact surface, wherein the laminated panel is located on the skin contact surface, and a liquid-permeable top sheet;
A liquid-impervious backsheet located on the non-skin contact surface, a liquid-absorbent core interposed between these sheets, and at least the backsheet extending laterally outward from an opposing side edge of the core. The present invention relates to an improvement of an absorbent article for treating body fluid, comprising a first flap having a liquid resistance and a second flap having a liquid resistance connected to the first flap.

According to the present invention, in the above structure, the second
The flap is made of a thermoplastic synthetic fiber of 1 denier or more, and first and second breathable fiber layers, and an ultrafine thermoplastic synthetic fiber smaller than the denier;
It is characterized by comprising a third fiber layer integrally interposed between the first and second fiber layers, having a higher water pressure resistance than the first and second fiber layers, and having air permeability. And

In one embodiment of the present invention, the first and second fiber layers are spunbonded nonwoven fabrics.

In one embodiment of the present invention, the first and second fiber layers are spunlaced nonwoven fabrics.

In one embodiment of the present invention, the third fiber layer is a melt-blown nonwoven fabric.

In one embodiment of the present invention, the basis weight of the second flap is 10 to 30 g / m ² .

In one embodiment of the present invention, the third fiber layer has a water pressure resistance of at least 30 mm.

In one embodiment of the present invention, the fiber composition ratio of each of the first and second fiber layers is 20 to 45% by weight, and the fiber composition ratio of the third fiber layer is 10% by weight.
６０60% by weight.

In one embodiment of the present invention, the fineness of the fibers of the first and second fiber layers is 1 to 3 denier, and the fineness of the fibers of the third fiber layer is less than 1 denier.

[0015] One of the embodiments of the present invention is that the second flap has a longitudinal stress of 400 to 10 at 5% elongation.
00g / 25 mm and a lateral stress of 50 to 3
00 g / 25 mm.

In one embodiment of the present invention, the lamination of the first and second fiber layers and the third fiber layer is held by a dot-shaped embossed fusion-bonded portion intermittently distributed. .

In one embodiment of the present invention, the area ratio of the fused portion is 5 to 30%.

In one embodiment of the present invention, the lamination of the first and second fiber layers and the third fiber layer is held by fiber entanglement.

[0019]

According to the absorbent article of the present invention, the body fluid does not flow unnecessarily on the surface of the second flap, does not leak from the side edge of the article through the second flap, and has air permeability. And there is no stuffiness between the article and the wearer's skin, yet it has the required flexibility and adheres well to the wearer's crotch, nevertheless due to the wearer's crotch No fuzz or breakage due to friction.

The reason will be outlined more specifically as follows. That is, the first and second fibrous layers which constitute the second flap and are located on both surfaces thereof are made of hydrophobic fibers of 1 denier or more, so that the surface of the body fluid flows like that of a plastic film. Does not have so-called smooth or smooth smoothness.
The third fiber layer, which constitutes the second flap and is located in the middle of the second flap, is composed of so-called ultrafine fibers having a fineness of 1 denier or less, and the space between the fibers is smaller than that of the first and second fiber layers. Has a water pressure resistance value that does not pass through. Since the third fiber layer as well as the first and second fiber layers also have air permeability, sufficient ventilation is provided between the article and the wearer's skin. Since the second flap is made of the first, second and third fiber layers, that is, the whole is made of fiber, the second flap has a required flexibility and adheres to the wearer's skin. Since the first and second fiber layers are made of fibers of 1 denier or more, that is, different from the ultrafine fibers of the third fiber layer, the fibers may be cut due to friction caused by the crotch of the wearer and may be fluffy. It has a surface friction strength that does not damage it.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of an absorbent article for treating body fluid according to the present invention will be described by taking a napkin or pad for absorbing and retaining menstrual blood of a woman as an example.
It is as follows.

1 and 2, the napkin includes a laminated panel 1, and the laminated panel 1 has a skin contact surface 3 and a non-skin contact surface 4. The laminated panel 1 includes a liquid-permeable top sheet 5 forming a skin contact surface 3, a liquid impermeable back sheet 6 forming a non-skin contact surface 4, and a liquid-absorbing core interposed between these sheets. 7 is included. The top sheet 5 and the back sheet 6 have a size that covers the core 7 and extends outward from the outer peripheral edge thereof, and the flaps 8 at both ends and the flaps 9 at both sides at the extended portions. And form. However, the top sheet 5 has a width dimension
It is smaller than the back sheet 6. Therefore, in the flap 9, both side edges of the back sheet 6 extend outward beyond both side edges of the top sheet 5. The extending portions of the top sheet 5 and the back sheet 6 forming each of the flaps 8 and 9 are joined to each other by a known joining means such as welding or an adhesive.

As the top sheet 5, the back sheet 6, and the core 7, those known as constituent materials of absorbent articles for treating body fluids such as napkins are used. More specifically,
As the top sheet 5, for example, a liquid-permeable nonwoven fabric having or not having a large number of openings or capillaries, or a plastic film having a large number of openings or capillaries is used. As the back sheet 6, for example, a moisture-permeable plastic film or a laminate sheet of the film and a non-woven fabric is used.
For the core 7, for example, a mixture of wood fluff pulp and superabsorbent hydrogel particles is used. Examples of the nonwoven fabric include polyolefin-based, polyester-based, and polyamide-based nonwoven fabrics, such as meltblown, spunlace, needle punch, thermal bond, spunbond, and chemical bond nonwoven fabrics. These nonwoven fabrics have a basis weight of 10 to 45 g / m ² and a fineness of 0.1 to 1
One made of 0 denier fiber is exemplified. Examples of the plastic film include a low-density polyethylene film containing inorganic particles and provided with a large number of micropores by a stretching treatment. Examples of the hydrogel include self-crosslinkable alkali metal acrylate polymers, starch graft polymers, modified cellulose, and crosslinked water-soluble polymers.

On the upper surface of each flap 9, a flap 10 is located. Each flap 10 is formed of a nonwoven fabric 11, as shown in FIG. The nonwoven fabric 11
First and second fiber layers made of thermoplastic synthetic fibers of denier or more and made of air-permeable first and second fiber layers 11a and 11b, and ultrafine thermoplastic synthetic fibers smaller than those deniers. 11a and 11b, which are integrally disposed between the first and second fiber layers 11a and 11b.
And a third fiber layer 11c having a higher air permeability.

First, second and third fiber layers 11a, 11
Examples of the materials b and 11c include polyolefin-based, polyester-based, and polyamide-based nonwoven fabrics. Particularly preferably, the first and second fiber layers 11a, 11a
b is a spunbond or spunlace nonwoven fabric, and the third fiber layer 11c is a meltblown nonwoven fabric.
The basis weight of the nonwoven fabric 11 is 10 to 30 g / m ² , of which the first and second fiber layers 11 a and 11 b each have a weight of 20 to 4 g / m ^2.
5% by weight, and the third fiber layer 11c is 10 to 60%.
It is preferable to occupy the weight% in order to obtain the required strength and texture. The third fiber layer 11c is made up of the first and second fibers.
Fiber density is higher than the fiber layers 11a and 11b, that is,
Since there is little space between the fibers, the air permeability is low, but the required air permeability can be imparted to the napkin. If the basis weight and the weight% are less than the above values, the required strength cannot be obtained, and if it exceeds the values, the required texture cannot be obtained. If the third fiber layer 11c is less than 10% by weight, the required water pressure resistance cannot be obtained. The water pressure resistance value is J
In the measurement according to the IS regulation, it is preferable that it is 30 mm or more. When the water pressure resistance value is less than the above value, the liquid resistance is not sufficient, and the body fluid easily penetrates, which is not preferable. The first and second fiber layers 11a and 11b have a denier of 1 to 3 denier, and the third fiber layer 11c is a so-called ultrafine fiber of less than 1 denier and has a fiber density of the first and second fiber layers 11a. , 11b is higher than
It is preferable in obtaining the required water pressure resistance, strength, and texture of the nonwoven fabric 11.

Further, regarding the texture of the nonwoven fabric 11, in order to prevent a rigid texture from being given when wrinkles are generated, the stress in the vertical direction at the time of 5% elongation is 40%.
It is preferable that the stress is 0 to 1000 g / 25 mm and the stress in the lateral direction is 50 to 300 g / 25 mm. Such a nonwoven fabric 11 is obtained by having the above-mentioned fiber configuration.

The first, second and third fiber layers 11a, 11
The laminations of b and 11c are held in a fused part by intermittently applied heat embossing or by fiber entanglement by high-speed water flow treatment. It is also preferable that the respective layers are held in this way in order to obtain the required strength and texture of the nonwoven fabric 11. In the case of the fused portion by the heat embossing treatment, the area ratio of the fused portion is preferably 5 to 30%, and if it is less than the value, the required strength cannot be obtained and if it exceeds the value. In addition, the required texture cannot be obtained, and the air permeability decreases.

The second flap 10 shown in FIG. 2 has a proximal end area 12 and a free end area 13, and when the free end area 13 is folded inward, the proximal end area 12 and the free end area 13 are integrally joined to the upper surface of each flap 9 by well-known joining means such as welding and bonding. Located in the free end region 13 is a resilient member 16 which contracts along a sleeve 15 formed by inward folding of a part thereof. The elastic member 16 is fixed with a well-known hot melt adhesive, and its contraction causes the free end region 13 to be fixed.
Is given a propensity to get up.

Each flap 10 shown in FIG. 4 has a proximal end area 12 and a free end area 13, and when the free end area 13 is tilted outward, the base end area 12 and the free end area 13 are integrally joined to the upper surface of each flap 9 by well-known joining means such as welding or an adhesive. The free end region 13 has an elastic member 16 contracting along the sleeve 15 formed by inward folding of a part thereof.
2 and that the elastic member 16 is fixed by a known hot melt adhesive and gives rise to the free end region 13 by contraction thereof, which is the same as the embodiment shown in FIG. Substantially the same.

Each of the flaps 10 shown in FIG. 5 is the same as the embodiment shown in FIGS. 2 and 4 in that it has a base end region 12 and a free end region 13, but has a central portion in the width direction. Are bent into a substantially U-shaped cross section to form a sleeve as a whole. In a state where both base end regions 12 sandwich the flap 9, they are integrally joined by well-known joining means such as welding or an adhesive. I have. The elastic member 16 contracting along the inner surface of the bent edge of the free end region 13;
6 is fixed by a known hot melt adhesive, and the shrinkage thereof gives the free end region 13 a rising tendency, which is substantially the same as the embodiment of FIG. However, the elastic member 16 shown in FIG. 5 has a relatively wide width and a substantially U-shaped cross section, and also provides the free end region 13 with excellent soft elasticity (cushioning property). In the case of the elastic member 16 having excellent cushioning properties, the elastic member 16 does not necessarily have to be attached so as to contract.

The elastic member 16 is made of natural or synthetic rubber, elastomer or the like. As the elastic member 16 shown in FIG. 5, polyurethane having open cells is suitable. This polyurethane is not only flexible but also
This is because it has both air permeability and liquid absorption.

[Brief description of the drawings]

FIG. 1 is a plan view of a sanitary napkin as an example of an absorbent article for treating body fluid according to the present invention.

FIG. 2 is an enlarged sectional perspective view taken along line 2-2 of FIG.

FIG. 3 is an enlarged sectional view of a nonwoven fabric forming a second flap.

FIG. 4 is an enlarged perspective view similar to FIG. 2, but showing another embodiment.

FIG. 5 is an enlarged perspective view similar to FIG. 2, but showing yet another embodiment.

[Explanation of symbols]

 Reference Signs List 1 laminated panel 3 skin contact surface 4 non-skin contact surface 5 top sheet 6 back sheet 7 core 9 first flap 10 second flap 11 nonwoven fabric 11a first fiber layer 11b second fiber layer 11c third fiber layer

Claims (12)

[Claims] 1. A laminate panel having a skin contact surface and a non-skin contact surface, wherein the laminate panel is located on the skin contact surface and a liquid-permeable top sheet located on the skin non-contact surface. Liquid-impervious backsheet, a liquid-absorbent core interposed between the sheets, and a first liquid-resistant first sheet formed by at least the backsheet extending laterally outward from the opposite side edge of the core. An absorbent article for treating body fluid, comprising: a flap and a second flap having liquid resistance connected to the first flap, wherein the second flap is made of a thermoplastic synthetic fiber having a denier of 1 denier or more. First and second fiber layers having properties,
Made from ultrafine thermoplastic synthetic fibers smaller than the denier, are integrally interposed between the first and second fiber layers, and have a higher water pressure resistance than the first and second fiber layers and are breathable. An absorbent article for treating body fluid, comprising: a third fiber layer having: 2. The absorbent article according to claim 1, wherein said first and second fiber layers are spunbonded nonwoven fabrics. 3. The absorbent article according to claim 1, wherein said first and second fiber layers are spunlaced nonwoven fabrics. 4. The absorbent article according to claim 1, wherein said third fiber layer is a melt-blown nonwoven fabric. 5. The basis weight of the second flap is 10 to 30 g.
² / m ² . 6. The absorbent article according to claim 1, wherein said third fiber layer has a water pressure resistance of at least 30 mm. 7. The fiber composition ratio of each of the first and second fiber layers is 20 to 45% by weight, and the fiber composition ratio of the third fiber layer is 10 to 60% by weight.
3. The absorbent article according to claim 1. 8. The absorbent article according to claim 1, wherein the fineness of the fibers of the first and second fiber layers is 1 to 3 denier, and the fineness of the fibers of the third fiber layer is less than 1 denier. 9. The absorbent article according to claim 1, wherein the longitudinal stress at the time of 5% elongation of the second flap is 400 to 1000 g / 25 mm, and the lateral stress is 50 to 300 g / 25 mm. 10. The absorptive material according to claim 1, wherein the lamination of the first and second fiber layers and the third fiber layer is held by an intermittently-distributed dot-shaped embossed fusion bonding portion. Goods. 11. The absorbent article according to claim 10, wherein an area ratio of the fused portion is 5 to 30%. 12. The absorbent article according to claim 1, wherein a laminate of the first and second fiber layers and the third fiber layer is held by fiber entanglement.