JP2823394B2 - Sanitary napkin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary napkin for absorbing and retaining menstrual blood. More specifically, the present invention relates to a sanitary napkin that uses two napkins selectively and overlaps the napkins.

[0002]

2. Description of the Related Art Conventionally, two napkins can be selectively used in accordance with a large amount of menstrual blood and a small amount of menstrual blood.
When the napkins are not replaced for a relatively long time, or at night, etc., sanitary napkins configured to be able to be used by overlapping them (hereinafter, referred to as
Double napkins) are known.

[0003]

However, in a known double napkin, a lower napkin adhered to a crotch abutment portion of a sanitary short to be worn and an upper napkin adhered to an upper surface thereof become sloppy during use. Since the napkins may be displaced, the overlapping effect of the napkins cannot be sufficiently exerted, and the wearer often feels uncomfortable or uncomfortable.

Further, in the known double napkin, the crotch abutment portion of the sanitary shorts is deformed by the wearer's crotch movement, pressure, or the like. Not only does the lower napkin not sufficiently fulfill the function of supporting the upper napkin, but a gap is formed between the lower napkin and the upper napkin, and menstrual blood often flows out of the gap. Since the napkin is used between groins, such deformation of the lower napkin is inevitable, but the problem is that even if the deformation force is released, the deformation does not recover to its original state.

An object of the present invention is to configure two napkins so as to eliminate the above-mentioned problem.

According to the present invention, there is provided a first napkin having a skin abutting surface and a non-skin abutting surface, wherein the first napkin is provided with a bonding means to shorts worn on the non-skin abutting surface; A contact surface and a non-skin contact surface;
A second napkin provided with bonding means for bonding to the skin contact surface;
A sanitary napkin comprising a napkin is assumed. According to the present invention, in the configuration according to the premise, the first napkin absorbs liquid between a porous liquid-permeable top sheet forming a skin contact surface and a liquid resistant back sheet forming a non-skin contact surface. A liquid-permeable material, wherein the top sheet is composed of a plastic sheet, and the back sheet or the core is composed of a soft elastic foam, and the second napkin forms a skin contact surface. A liquid-absorbent core is interposed between the conductive topsheet and the liquid-resistant backsheet forming the non-skin contact surface, and the width and the length are respectively larger than the width and the length of the first napkin. Is formed small.

[0007] In the present invention, the term "liquid resistance" means a property having liquid impermeability or water repellency and substantially not penetrating menstrual blood when a napkin is used.

[0008]

In the napkin according to the present invention having the above structure, the first napkin is adhered to the crotch contact portion of the shorts worn by the adhesion means of the non-skin contact surface, and the second napkin is adhered to the non-skin contact surface. Is used by bonding to the skin contact surface of the first napkin with the bonding means of (1). In this case, the second napkin preferentially absorbs menstrual blood, and the first napkin absorbs excess menstrual blood not absorbed by menstrual blood. Since the skin contact surface of the first napkin is a plastic sheet which is not a fibrous sheet such as a non-woven fabric which is easily fluffed, the adhesive force of the non-skin contact surface of the second napkin to the skin contact surface by the fiber means is a fiber sheet. Stronger than.

Further, even if the lower napkin is deformed due to the deformation of the crotch abutment portion of the shorts worn by the wearer's crotch movement or pressure, either the back sheet or the core of the lower napkin is soft. Since it is made of an elastic foam, when its deformation force is released, it is relatively easily, if not completely, resiliently restored to its original shape, and functions as a base napkin for the second napkin.

[0010]

1A, 1B and 1C are schematic external views of a napkin according to the present invention. This napkin has a first napkin 1 as a base napkin and a second napkin 2 as an on-napkin having a width and a length smaller than the width and the length of the first napkin 1, respectively.
It consists of: The first napkin 1 and the second napkin 2 have skin contact surfaces 1a, 2a and non-skin contact surfaces 1b, 2b, respectively. The size (width and length dimension) of the second napkin 2 with respect to the first napkin 1 is such that when the first napkin 1 is pressed against the skin side of the wearer by wearing shorts, its outer peripheral portion is in close contact with the skin. Therefore, it is important that the second napkin 2 is formed so as to be completely covered and sealed between the second napkin 2 and the skin.

Generally, the second napkin 2 is preferably formed to have a thickness larger than the thickness of the first napkin 1. Further, as understood from the chain line region 3, the second napkin 2 has a front end F with respect to the first napkin 1.
It is preferable to superimpose so as to be deviated to the side of the wearer from the viewpoint of wearability of the wearer, compatibility with the crotch and absorption of menstrual blood, and therefore the superimposition position is clearly indicated by means such as printing. Is preferred.

FIG. 2 is a schematic cross-sectional view of the first napkin 1. The first napkin 1 forms a laminate by covering the entire liquid-absorbent core 4 with a porous liquid-permeable topsheet 5, and extends the entire laminate from the bottom to the upper portion on both sides to form a liquid-resistant backsheet 6. At the longitudinal end of the first napkin 1, the sheet 6 is joined by a known joining means, and the upper side of the first napkin 1 and the flap 7 which is a part of the sheet 6 located there are pockets 10. Is formed.

FIG. 3 shows another embodiment of a schematic cross-sectional view of the first napkin 1. The first napkin 1 is configured such that the entire liquid-absorbent core 14 is located between the porous liquid-permeable top sheet 15 and the liquid-resistant back sheet 16 to form a laminate, and a sheet extending from the outer periphery of the core 14. Flap 17 at part of 15, 16
Is formed, and the flap 17 is joined by known joining means.

FIG. 4 shows yet another embodiment of a schematic cross-sectional view of the first napkin 1. The first napkin 1 has a liquid absorbent core 2
4 is positioned between the porous liquid-permeable topsheet 25 and the liquid-resistant backsheet 26 to form a laminate.
A flap 27 is formed by a part of the sheets 25 and 26 extending from the outer periphery of the flap 27, and the flap 27 is joined by known joining means. The core 24 forms the concave portion 11 having the size of the chain line region 3 shown in FIG. 1, and the second napkin 2 is mounted on the concave portion 11 via the inner sheet 25.

FIG. 5 shows a schematic plan view of still another embodiment of the first napkin 1, and FIG. 6 shows a schematic cross-sectional view of the first napkin 1 through a wing portion thereof. The first napkin 1 is configured such that the entire liquid-absorbent core 34 is located between the porous liquid-permeable top sheet 35 and the liquid-resistant back sheet 36 to form a laminate, and a sheet extending from the outer periphery of the core 34. A flap 37 is formed by a part of the flaps 35 and 36, and a second flap 37 is formed on the upper surface of the flap 37.
Are overlapped and their outer edges are joined by known joining means. On both sides biased to the front end F,
A part of the flaps 37, 37a located on both sides is further extended to form a wing 37b. In addition, the elastic member 1 is folded back inside the flap 37a, and expands and contracts in the length direction inside along the folding line.
2, and the pocket 20 is formed by the flap 37a.

A predetermined adhesive on a lower surface of the back sheets 6, 16, 26, 36 is coated with a bonding agent 8, 18, 28,
And providing them with a known protective release sheet, for example,
Kraft paper coated with silicone resin 9,19,2
Coated with 9,39.

The cores 4, 14, 24, 34 are composed of a mixture of ground pulp (fluff pulp) and superabsorbent polymer powder. However, the back sheet 6, 16, 2
Depending on the relationship with the material of 6,36, it has a compressive restoring elasticity, for example, an open-cell / hydrophilic or hydrophobic foam having soft elasticity, preferably urethane, and further formed from the urethane It is preferable to use a sheet or mat-like material in which hydrophilic fibers and superabsorbent polymer powder are integrally held by a known method over the entire surface including the inside. Of course, such a foam sheet or mat-like material may be used in combination with the mixture. Further, as the core having compression restoring elasticity, a mixture of crimped fibers and pulverized pulp or superabsorbent polymer powder is also effective.

The topsheets 5, 15, 25, 35 are made of a plastic sheet having a size such that menstrual blood can pass therethrough. The hole is formed in a well-known liquid guide tube in which a part of the sheet extends to the back side, for example, Japanese Patent Laid-Open No.
81 may be a tapered capillary.

The back sheets 6, 16, 26, 36 are made of closed-cell, hydrophobic, soft elastic urethane. Other foams such as polyethylene, polybutadiene, EVA can be used as long as they have such properties. However, the back sheet 36 of the first napkin 1 shown in FIGS. 5 and 6 may be a normal liquid-resistant sheet, for example, a non-foamed polyethylene sheet. This is because the napkin has the wings 37b for wrapping around the crotch abutment portion of the shorts to be worn and fixing the napkin, and thus can perform a certain shape-retaining function without necessarily relying on the compression restoring elasticity.

In the present invention, the cores 4, 14, 2
It is essential that at least one of the backsheets 4, 34 and the backsheets 6, 16, 26, 36 is made of a soft elastic foam. In order to achieve the desired effect, they are generally dependent on the material, but generally 0.5 mm or more, especially 1 to 1 mm.
It is preferably formed to a thickness of 7 mm.

FIG. 7 is a schematic cross-sectional view of the second napkin 2. The second napkin 2 forms a laminate by covering the entire liquid absorbent core 44 from the bottom surface thereof and the upper portions on both sides thereof with a liquid resistant back sheet 46, and forms the entire laminate with a liquid permeable top sheet 45. A part of the topsheet 45 that is covered and extends from both ends in the length direction of the second napkin 2 is joined by known joining means.

FIG. 8 shows another embodiment of a schematic cross-sectional view of the second napkin 2. The second napkin 2 is made of a liquid-permeable top sheet 55 and a liquid-resistant back sheet 56 as a whole.
And a laminate is formed between them, and a flap 57 is formed by a part of the sheets 55 and 56 extending from the outer periphery of the core 54, and the flap 57 is joined by known joining means.

The cores 44 and 54 are formed so that both side edges thereof can be inserted into the pockets 10 and 20 shown in FIGS. 2 and 6. As shown in the figure, the slope formed from the inside to the outside facilitates the insertion and the first
This is preferable for preventing a sudden step from being formed between the napkin 1 and the upper surface. Although not shown, the core 4
4, 54 are formed in a convex shape by projecting their central upper surfaces so that they can be easily adapted to the wearer's local area and can prevent the movement of the second napkin 2 when worn. You may have.

At predetermined positions on the lower surfaces of the back sheets 46 and 56, bonding means 48 and 58 to which the known adhesive is applied are provided, and they are covered with the same 49 and 59 as the known protective release sheet. I have.

The cores 44, 54, the surface sheets 45, 55,
As the back sheets 46 and 56, those known as those materials of the sanitary napkin can be used. For example,
The cores 44 and 54 may be a mixture of ground pulp and superabsorbent polymer powder, the top sheets 45 and 55 may be a nonwoven fabric, and the back sheets 46 and 56 may be a polyethylene sheet.

[0026]

According to the napkin according to the present invention, the first
The top sheet of the napkin is made of a porous liquid-permeable plastic sheet, and either the back sheet or the core is made of a soft elastic foam.

Therefore, the bonding force of the bonding means of the skin contact surface of the first napkin to the skin non-contact surface of the second napkin is strong,
During use, the first napkin does not deviate from the second napkin, and the overlapping effect of the napkins can be sufficiently exhibited, and the wearer does not feel uncomfortable or uncomfortable. At the same time, even if the first napkin is directly affected by the crotch abutment of the sanitary shorts and deformed due to crotch movement or pressure of the wearer, the deformation force is released, The first napkin is restored to its original state by the compression restoring elasticity of the soft elastic foam. Therefore, the first napkin can sufficiently fulfill the function of supporting the second napkin, and a gap is formed between the first napkin and the first napkin, and menstrual blood does not flow out of the gap. ).

When the first napkin is pressed against the skin side of the wearer by wearing shorts, its outer peripheral portion is in close contact with the skin, completely covers the second napkin, and is sealed between the skin and the skin.
Moreover, since pockets are formed on both sides of the first napkin for inserting the two sides of the second napkin, the above-mentioned displacement of the first napkin can be further prevented. Can be effectively prevented (claims 2 and 3).

Since the first napkin and the second napkin each have a complete structure as a napkin, they can be used alone (claim 1).

[Brief description of the drawings]

FIG. 1A is a schematic plan view of a first napkin. B is the second
The schematic plan view of a napkin. C is a schematic side view in which a second napkin is overlaid on a first napkin.

FIG. 2 is a schematic cross-sectional view showing an aspect of an internal structure of a first napkin.

FIG. 3 is a schematic cross-sectional view showing another embodiment of the internal structure of the first napkin.

FIG. 4 is a schematic cross-sectional view showing still another aspect of the internal structure of the first napkin.

FIG. 5 is a schematic plan view showing another embodiment of the first napkin.

FIG. 6 is a schematic cross-sectional view showing another embodiment of the internal structure of the first napkin in FIG.

FIG. 7 is a schematic cross-sectional view showing an aspect of the internal structure of the second napkin.

FIG. 8 is a schematic cross-sectional view showing another aspect of the internal structure of the second napkin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st napkin 2 2nd napkin 4,14,24,34 Core of 1st napkin 5,15,25,35 Top sheet of 1st napkin 6,16,26,36 Back sheet of 1st napkin 10,20 Pocket 44,54 Core of second napkin 45,55 Top sheet of second napkin 46,56 Back sheet of second napkin

Claims (3)

(57) [Claims] 1. A first napkin having a skin contact surface and a non-skin contact surface, wherein the non-skin contact surface is provided with a bonding means for shorts worn, and a skin contact surface and a non-skin contact surface. A sanitary napkin comprising a non-skin contact surface and a second napkin provided with an adhesive means for the first napkin to the skin contact surface, wherein the first napkin has a skin contact surface. A liquid-absorbent core is interposed between the porous liquid-permeable topsheet to be formed and the liquid-resistant backsheet to form the non-skin contact surface, and the topsheet is made of a plastic sheet, and the backsheet and the core. Wherein the second napkin is formed between a liquid-permeable top sheet forming a skin-contacting surface and a liquid-resistant backsheet forming a non-skin-contacting surface. And a width and a length of the first napkin. It said napkin, characterized in that are formed small width and length respectively than the law. 2. The width and length of the second napkin with respect to the first napkin are such that when the first napkin is pressed against a wearer's skin with shorts worn, an outer peripheral portion thereof is in close contact with the skin. The napkin according to claim 1, wherein the napkin is formed so as to completely cover the second napkin and seal it between the second napkin and the skin. 3. The second napkin is provided on both sides thereof with the second napkin.
The napkin according to claim 1, wherein pockets for inserting both side portions of the napkin are formed.