JP2003038563A - Auxiliary sheet for absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary sheet for absorbent article that prevents the skin of the wearer of a sheet-like absorbent article (menstrual napkin) from again getting wet with the humor of the wearer absorbed in the article and the leakage of the humor from the absorbent article by reducing the contacting area between the humor and the body of the wearer and, preventing the diffusion of the humor. SOLUTION: This auxiliazy sheet for absorbent article 1 has a through hole 2 in which the labia of the wearer can be put and an adhesive section 3 used for firmly adhering the sheet to the body of the wearer near the margin of the hole 2. When the wearer wears the absorbent article (menstrual napkin) 10, this auxiliary sheet is interposed between the napkin 10 and the inner part of the thigh of the wearer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary sheet for absorbent articles which complements the function of a sheet-shaped absorbent article such as a sanitary napkin or gives a new function to the sheet-shaped absorbent article. .

[0002]

2. Description of the Related Art Conventionally, a sanitary napkin has been widely used as a sheet-shaped absorbent article for absorbing body fluid such as menstrual blood. Great efforts have been made on such sanitary napkins in order to prevent leakage of menstrual blood. Also,
Various measures have been taken to improve the feeling of wearing a sanitary napkin that has absorbed menstrual blood during wearing.

In view of this point, in order to prevent leakage and improve the wearing feeling, in Japanese Utility Model Laid-Open No. 7-18712, a ridge is provided on the rear side to fix it in the labia.
A sanitary napkin has been proposed in which a gap is provided between the front and the clitoris to isolate the sanitary napkin (see FIG. 7 in the same publication). According to this sanitary napkin, since menstrual blood excreted from the vaginal opening can be directly absorbed by the ridge, menstrual blood can be prevented from leaking out and adhering to underwear or the like. Also,
Since the sanitary napkin does not come into contact with the vicinity of the clitoris, even if the sanitary napkin attached to the undergarment moves, the sanitary napkin does not rub against the vicinity of the clitoris and the occurrence of inflammation due to rubbing is prevented.

[0004]

Generally, the surface of a sanitary napkin is saturated when a certain amount of menstrual blood is absorbed, and it becomes difficult for menstrual blood to be absorbed deeper than that. It is a thing. Therefore, the actual Kaihei 7-18712
In the sanitary napkin according to the publication, when the menstrual blood absorption capacity is saturated in the portion of the ridge, menstrual blood is difficult to be absorbed in the ridge, menstrual blood that is not absorbed there, There is a risk that it will flow forward through the crevice and leak through the gap provided between the sanitary napkin and the clitoris.

Further, since the ridge is to be fixed in the labia, menstrual blood contained in the ridge always keeps the labia in a wet state. Moreover, since the labia is formed by the mucous membrane of the labia, its resistance to stimuli is weak, and skin roughness and rash caused by long-term contact with menstrual blood are more prominent than other areas. More likely to occur.

Further, there is a possibility that the menstrual blood absorbed in the sanitary napkin may return to the body side due to pressure and the like, causing so-called rewetting. In such a case, a portion where the wearer's skin and the sanitary napkin are in close contact with each other, specifically, in the range where the menstrual blood absorbed in the raised portion diffuses, may cause rough skin or rash. .

To prevent such rewetting,
In Japanese Patent Publication No. 11-507577, a first layer having a perforated film having an opening larger than an opening provided in a sheet of a normal sanitary napkin and a perforated film having no large opening are provided. Disclosed is a sanitary napkin having a double-layered topsheet comprising a second layer comprising. According to this sanitary napkin, the first layer, which has a large opening and has a high liquid passage rate, quickly permeates menstrual blood and sends it to the second layer. Then, it seems that the second layer, which has a lower liquid passage rate than the first layer, shields the absorbed menstrual blood and prevents its backflow, so that the occurrence of rewetting is reduced. However, menstrual blood absorbed in the first layer may return to the first layer without going to the second layer, and in such a case, rewetting will occur.

The present invention has been made in view of the above problems, and an object thereof is to reduce the contact range between menstrual blood absorbed in a sheet-shaped absorbent article and the wearer's body. An object of the present invention is to provide an auxiliary sheet for absorbent articles which can prevent menstrual blood from diffusing and reduce rewetting of the skin and generation of leakage of menstrual blood from the absorbent articles.

[0009]

In order to solve the above problems, in the present invention, a sheet-like absorbent article is interposed between the wearer's inner crotch and the labia are fitted. By providing an auxiliary sheet for absorbent articles having a structure having through holes that can be fitted together, when the labia are fitted in the through holes, menstrual blood flowing out from the labia promptly flows from the through holes to the absorbent articles. By being guided, direct contact between the diffused menstrual blood and the wearer's body is prevented, and the occurrence of problems such as rash is avoided.

More specifically, the present invention provides the following.

(1) An auxiliary sheet for an absorbent article, which is used together with a sheet-shaped absorbent article and complements the function of the sheet-shaped absorbent article or imparts a new function to the sheet-shaped absorbent article. The auxiliary sheet for absorbent articles is provided with a through hole that allows a predetermined range of a pair of labia to fit comfortably, and the depth of the through hole is such that the through hole of the absorbent article auxiliary sheet fits into the pair of labia. The auxiliary sheet for absorbent articles, wherein the pair of labia are set to have a depth larger than the depth at which the labia are fitted into the through hole.

The auxiliary sheet for absorbent articles according to the present invention is
Since it has a through hole large enough to fit the labia, by inserting the labia into the through hole when wearing it, body fluid (especially menstrual blood) flowing out from inside the labia can be quickly formed into a sheet. It will be guided to an absorbent article. Therefore, body fluid does not diffuse between the wearer's body and the auxiliary sheet for absorbent articles in a state of contacting the body.

Moreover, since the auxiliary sheet for absorbent articles according to the present invention is interposed between the sheet-shaped absorbent article and the wearer's body, the sheet-shaped absorbent article can be used in the range of such intervention. Clearance occurs with the wearer's body. Therefore, even if the body fluid once absorbed by the sheet-shaped absorbent article returns to the side surface of the body due to pressure, it is possible to remarkably reduce rewetting of the skin of the wearer due to rewet.

Furthermore, according to the auxiliary sheet for absorbent articles of the present invention, even if the labia is fitted into the through holes, the auxiliary sheet for absorbent articles can be used as the auxiliary sheet for absorbent articles. The absorbent article is located on the non-body side, and the tip of the labia is difficult to contact with the absorbent article. Therefore, unlike the conventional example, the labia are unlikely to come into contact with body fluid for a long time.

Since the average depth of the labia of Japanese women is about 17 mm, the depth of the through holes is in the range of 3 to 30 mm, more preferably 5 to 25 mm, and even more preferably. Is preferably in the range of 10 to 20 mm. By forming the through hole having the depth dimension in such a range, the non-contact state between the sheet-like absorbent article and the wearer's labia can be reliably ensured.

In the absorbent article auxiliary sheet according to the present invention, it is sufficient that the depth of the through holes is greater than the depth of the labia, and the entire absorbent article auxiliary sheet has the same thickness as the depth of the through holes. No need. Therefore, it suffices if the periphery of the through hole has a thickness comparable to the depth of the through hole, and the other portions may be thinner than that.

As described above, by using the auxiliary sheet for absorbent articles according to the present invention, the flow of body fluid is directed so as to pass through the through holes provided in the auxiliary sheet for absorbent articles. Therefore, it is possible to suppress the occurrence of rough skin and rash due to the contact of the wearer's body with the seat surface enriched with body fluid.

Moreover, since the body fluid is absorbed into the sheet-like absorbent article from the inside of the labia via the through holes,
The situation in which it diffuses in a wide range and leaks out of the sheet-shaped absorbent article is significantly reduced. Therefore, it is possible to give the wearer a psychological sense of security.

As described above, the auxiliary sheet for absorbent articles according to the present invention can ensure the functions of preventing rough skin and preventing body fluid from leaking in the sheet-shaped absorbent article.

In addition, even if the sheet-shaped absorbent article used in combination with the auxiliary sheet for absorbent articles loses its shape, the flow of the bodily fluid is limited to a certain direction due to the presence of the through holes. Since it cannot be directed, the risk of body fluid leakage is reduced.

(2) The auxiliary sheet for absorbent articles comprises:
The auxiliary sheet for absorbent articles according to (1), which has a single-layer or multi-layer structure in which the liquid-impermeable sheet and / or the soft touch sheet is a unit.

Such an auxiliary sheet for absorbent articles according to the present invention may include a liquid impermeable sheet.
Therefore, even if the body fluid (especially menstrual blood) absorbed by the sheet-shaped absorbent article returns to the auxiliary sheet body for absorbent articles, the fluid-impermeable sheet prevents the body fluid from absorbing the body fluid. It does not penetrate into the side surface of the body of the auxiliary article auxiliary sheet. That is, even if the body fluid once absorbed into the sheet-shaped absorbent article is rewet due to pressure, etc., in the range in which the absorbent article auxiliary sheet according to the present invention is present, the skin of the wearer is affected. There is no rewetting.

As the material of the "liquid impermeable sheet", a liquid impermeable film or water resistant sheet and a laminate material of the sheet and the non-woven fabric are mainly used. Specifically, it is a film of 20 to 30 g / m 2 molded from PP (polypropylene), PE (polyethylene), PET (polyethylene terephthalate), or the like. In addition,
When considering the texture, low density polyethylene (LD
It is preferable to use a film based on PE) resin.

Other liquid-impermeable sheets are made of PE, PP, PP / PE random copolymer resin, or composite fiber having a core-sheath structure such as PE / PP or PE / PET. Spunbonded non-woven fabric (S), melt blown non-woven fabric (M), or S that is a composite of S and M
A composite non-woven sheet such as MS or SSMMSS can be used. Specifically, an SMS sheet having a composite of an S layer of 5 to 15 g / m ² and an M layer of 15 to 30 g / m ² and having a water pressure resistance of 3000 Pa or more is preferable.

Further, another liquid impermeable material may be a foam material. A foam material having a structure of closed cells is used. As a preferable one, a resin in which PE / EVA is mixed at a ratio of 80/20 is foamed at a ratio of 15 times, cross-linked by electron irradiation, and then half-cut in the thickness direction, and the surface side is a skin layer. There is a foam material having a thickness of 1.5 mm obtained by coating the inner surface side with a cell layer and applying a surfactant on the inner surface side.

The auxiliary sheet for absorbent articles according to the present invention is
A soft touch sheet can be placed on the skin contact surface side. This makes it possible to provide a comfortable feel when the skin comes into contact with the auxiliary sheet for absorbent articles, and also to reduce the occurrence of rough skin and rash.

In the present specification, the "soft touch sheet" means one having a good feel to the skin, which is bulky and has a cushioning property, a smooth one which does not rub the skin, and which follows the movement of the skin. It is possible to appropriately select and use a material having such stretchability or extensibility.

The liquid-impermeable sheet and the soft touch sheet can be provided alone in the auxiliary sheet for absorbent articles according to the present invention, or both can be provided to form a multilayer structure.

The multi-layer structure is, for example, a two-layer structure in which a liquid impermeable sheet and a soft touch sheet are provided one by one, and the soft touch sheet is used as a skin contact surface and a sheet-shaped absorbent article contact surface. It is also possible to have a three-layer structure in which a non-transparent sheet is sandwiched between them to form a sandwich.

In the case of the three-layer structure, the soft touch sheet arranged on the side of the body first comes into soft contact with the wearer's skin when worn, and thus provides a comfortable wearing feeling. On the other hand, the soft touch sheet arranged on the side opposite to the body absorbs the flow of the body fluid rewet due to the pressure applied when it is worn, thus reducing the occurrence of leakage of the body fluid.

(3) The auxiliary sheet for absorbent articles according to (2), wherein the liquid-impermeable sheet has air permeability.

A material having air permeability is used for the liquid impermeable sheet included in the auxiliary sheet for absorbent articles according to the present invention. Therefore, it is possible to reduce the occurrence of stuffiness even when the user wears it for a long time.

As the material of the liquid-impermeable sheet having "breathability", a number of cells are formed by mixing an inorganic filler at a ratio of 40 to 60% by weight and subjecting it to stretching, that is, so-called ventilation. There is a sex film. This film is
It is preferably used in the range of 20 to 40 g / m ² .

A three-dimensional foam film can also be used as the material having air permeability. As this three-dimensional foam film, one having a structure that has air permeability and can also prevent the invasion of liquid is used, and in particular, the bulk dimension is 0.3 to 1.0 mm and the porosity is 20 to 50%. The hole diameter is 0.3 to 0.6 mm and the capillary shape is tapered or inclined. The selected three-dimensional foam film will be arranged with the capillaries facing the underwear direction. In addition, the three-dimensional foam film,
A water repellent such as silicone or fluorine may be mixed in a ratio of 0.1 to 5%.

(4) The auxiliary sheet for absorbent articles according to (2) or (3), wherein the soft touch sheet is a nonwoven fabric sheet and / or a foam sheet.

According to such an auxiliary sheet for absorbent articles according to the present invention, the soft touch sheet is made of non-woven fabric and / or foam. The auxiliary sheet for absorbent articles in which such a soft touch sheet is arranged on the body side has a smooth feel to the wearer, and it is possible to further reduce the rough skin and rash and improve the wearing feeling. Becomes

As the material of the "nonwoven fabric" sheet, a fiber sheet may be used alone or a laminate or the like may be used. As the fiber sheet, for example, PE / PP or PE / PET whose surface has been subjected to a water-repellent treatment with silicone or fluorine
Fibers having a core-sheath structure of 1.1 to 3.3 dtex are formed into a fibrous web by a card method and formed into a sheet by hot embossing or through air or hydroentanglement.

As the non-woven sheet, it is also possible to use a mixture of regenerated / natural cellulose fibers in an amount of 5 to 30% by weight. This can reduce the feeling of stuffiness on the wearer's skin.

Other materials for the non-woven fabric sheet include spans made of PP or PE, a random copolymer resin of PP and PE, or a composite fiber having a core-sheath structure such as PE / PP or PE / PET as a single material. Bonded nonwoven fabric (S), melt blown nonwoven fabric (M), SMS that combines S and M, S
SMMSS or the like can be used.

A preferred example of the non-woven sheet is a through-air non-woven sheet having a particularly smooth texture and an excellent bulky feeling. Specifically, a fiber 90 made by crimping a PE / PP composite fiber into 2.2 dtex.
% Weight ratio and natural cellulose fiber 10% weight ratio, and has a basis weight of 30 g / m ² and a bulk of 1.2 mm. In addition to these, a laminate of a film containing synthetic rubber as a main component and a non-woven fabric can also be used.

As other materials, a three-dimensional foam film, a laminate of a film containing PE or synthetic rubber as a main component and a non-woven fabric, and a foam sheet containing PE or synthetic rubber as a main component can be used. For example, a closed cell structure, an open cell structure, etc. are mentioned. As a foam sheet, the closed cell structure is particularly flexible, and
Is obtained by foaming a main component or a mixture of PE and EVA and then crosslinking by electron beam irradiation, and preferably has a thickness dimension of 0.5 to 2.0 mm and a foaming ratio of 5 to 20 times. When using a three-dimensional foam film, it is desirable to arrange the surface on which the capillaries are present facing the skin contact surface side.

(5) The auxiliary sheet for absorbent articles according to any one of (1) to (4), wherein the opening of the through hole has an oblong shape.

According to the auxiliary sheet for absorbent articles according to the present invention as described above, the openings of the through holes are oblong. Therefore, the wearer can easily insert the vertically long labia into the through holes, and can direct the flow of body fluid (especially menstrual blood) transmitted along the labia to the sheet-shaped absorbent article. As a result, it is possible to further prevent the diffusion of the body fluid flowing out from the labia.

The opening of the through hole has a longitudinal dimension of 60 to 60.
The range is preferably 180 mm, more preferably 80 to 150 mm, further preferably 90 to
The range is 120 mm. Also, the dimension in the lateral direction is 3
It is preferably in the range of 0 to 80 mm, more preferably 35 to 50 mm. By forming the opening of the through hole with a size within such a range, it becomes possible to fit the pair of labia appropriately into the through hole.

(6) The through holes are arranged so as to be offset to either one of both ends in the longitudinal direction of the auxiliary sheet for absorbent articles (1) to (5). ) An auxiliary sheet for absorbent articles according to any one of the above.

According to the auxiliary sheet for absorbent articles according to the present invention, the through hole is arranged in a portion other than the central portion in the longitudinal direction. This considers the presence of pubic hair near the labia.

That is, a region where a lot of pubic hair exists (pubic hair part)
In the above, since the pubic hair interferes with the close contact between the absorbent article auxiliary sheet and the wearer's body, a gap is apt to occur between the absorbent article auxiliary sheet and the wearer's body.

Moreover, since the pubic hair is much thicker than the fibers used in the nonwoven sheet and has a large surface area, body fluid is more likely to adhere to the fibers than the fibers used in the nonwoven sheet. Further, since the pubic hair has fine irregularities (cuticles), the body fluid once attached to the pubic hair is captured by the irregularities and becomes difficult to separate from the pubic hair. As a result, there is a risk that the bodily fluid diffuses along the pubic hair, and the bodily fluid leaks from the gap formed between the absorbent article auxiliary sheet and the wearer's body.

In this regard, it is considered that the above-mentioned gap can be prevented and the leakage of body fluid can be prevented by bringing the wearer's body into close contact with the auxiliary sheet for absorbent articles with an adhesive. However, if the adhesive is directly attached to the pubic hair portion, the pubic hair is pulled together when the auxiliary sheet for absorbent articles is removed, which may damage the skin. In order to avoid such a situation, if the adhesive is applied while avoiding the pubic hair portion, it is not possible to prevent the formation of a gap in the pubic hair portion, which is insufficient for preventing body fluid leakage.

In this respect, in the auxiliary sheet for absorbent articles according to the present invention, since the through holes are arranged not on the center in the longitudinal direction but on one side of both ends, the pubic hair part and the absorbent The contact area of the surface portion of the auxiliary sheet for articles becomes wide. As a result, the body fluid that tries to flow through the pubic hair is moved to the auxiliary sheet side for the absorbent article, and it is possible to prevent the body fluid from leaking due to the body fluid diffusion, thus reducing the risk of rough skin. Can be done. In addition, since the pubic hair is generally present in front of the labia, it is preferable to position the through hole near the rear end portion of the auxiliary sheet for absorbent articles (see FIG. 4).

In order to receive the body fluid that diffuses in the pubic hair part, not only is the range in which the auxiliary sheet for absorbent articles is in contact with the pubic hair part expanded in the longitudinal direction by biasing the through holes, but also in the lateral direction. It is also effective to widen the region near the front end portion and make the auxiliary sheet for absorbent articles have a scissor-like shape (see FIG. 5). With such a shape, it is possible to further reduce the wearer's anxiety about the leakage of body fluid.

In the present specification, the "front end portion" of the absorbent article auxiliary sheet means a portion positioned in the vicinity of the wearer's mound when worn, and the "rear end portion" of the wearer when worn. The part located near the perineum.

(7) An adhesive section for adhering to the wearer's body is provided on the side surface of the body of the absorbent article auxiliary sheet, according to any one of (1) to (6). Auxiliary sheet for absorbent articles.

According to the auxiliary sheet for absorbent articles according to the present invention as described above, the adhesive portion is provided on the surface which is in contact with the body. Therefore, the pressure-sensitive adhesive applied to the pressure-sensitive adhesive portion can be brought into contact with the wearer's body to attach the auxiliary sheet for absorbent articles to the body. As a result, the auxiliary sheet for absorbent articles is prevented from being displaced due to the movement of the wearer, so that it is possible to maintain a suitable wearing state when worn.

The adhesive portion can have various shapes such as a strip shape, an elliptical shape and a semi-elliptical shape, and a plurality of adhesive sections can be provided.

Arrangement of the pressure-sensitive adhesive in the pressure-sensitive adhesive portion is not particularly limited, and can be appropriately selected from stripes, planes, dots, meshes and the like.

The adhesive force of the adhesive was determined by pressing the adhesive placed on the polyester film with a roller having a load of 3000 pa on a stainless steel plate and then pulling at a speed of 100 m / mi.
The value obtained by measuring the peel strength at 180 degrees with n is 100 to 200.
It is preferable that the shear force is 0 mN and the shearing force is 3000 to 15000 mN. This considers the burden on the wearer's skin.

In order to prevent the adhesives from sticking to each other, the texture of the auxiliary sheet for absorbent articles is measured in accordance with JIS L-1018 (cantilever A method) within a range of 10 to 70 mm / 25 mm. More preferably, it is within the range of 15 to 40 mm / 25 mm.
Such a texture also has the effect that the auxiliary sheet for absorbent articles itself has a suitable hardness that does not impair the wearing feeling.

As the "adhesive" that can be used for the adhesive part,
Examples thereof include a gel adhesive composed of a water-soluble polymer, a cross-linking agent, a plasticizer, and water. More specifically, examples of water-soluble polymers include gelatin, sodium polyacrylate, polyvinyl alcohol, and carboxymethyl cellulose, and examples of cross-linking agents include water-soluble metal salts such as calcium chloride and magnesium sulfate. Examples of agents include glycerin,
Examples thereof include wax and paraffin.

In addition to this, a pressure-sensitive hot melt adhesive can also be used. This pressure sensitive hot melt adhesive is a styrene-butadiene-styrene block copolymer (SB
S), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / butadiene-styrene block copolymer (SEBS), styrene-ethylene / propylene-styrene block copolymer (SEP)
A synthetic rubber resin such as S) is used as a main component, and a tackifier such as a terpene resin and a rosin resin and a plasticizer such as a wax are melt-mixed therein.

When the pressure-sensitive hot-melt pressure-sensitive adhesive is melted, air or nitrogen gas is blown in and mixed, and the blown air or nitrogen gas expands to form fine and numerous bubbles therein, which is 3 to 20 times larger. A foam melt obtained by forming a foam at a magnification is also effective because of its excellent elasticity.

As the other pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive can also be used. Examples of silicone-based adhesives include silicone resins and fluororesins as main components, and crosslinking agents such as metal salts such as platinum, molybdenum and antimony, ester-based wax, glycerin, plasticizers such as machine oil. And the like.

Although there are many pressure-sensitive adhesives for forming the pressure-sensitive adhesive portion, it is preferable to use a pressure-sensitive hot melt pressure-sensitive adhesive in consideration of coating stability. More specifically, SEBS is 15 to 25% by weight, and plasticizer is 15 to 35% by weight.
A pressure-sensitive adhesive obtained by melt mixing 40% by weight to 40% by weight of a tackifier is preferable. This pressure-sensitive hot melt adhesive contains 0.1 to 1.0% by weight of an antioxidant, an anti-fluorescent agent, etc.
It is also possible to add in the range of.

A preferable example of the adhesive portion is a composite adhesive portion in which an adhesive is applied in a spiral or spray form on the surface side coated with foam melt. Specifically, 25 to 50% by weight of SEBS and 25 to 4 of a plasticizer are used.
Formed by mixing nitrogen gas into a low-tackiness type pressure-sensitive adhesive obtained by melt-mixing 0% and a tackifier at a ratio of 10 to 50% by weight, and applying it in a range of ²⁰ to 100 g / cm ² at a foaming ratio of 5 to 15 times. The thing which applied the above-mentioned adhesive on the surface side of an adhesion part is mentioned. By doing so, it is possible to obtain an adhesive portion having a good texture and excellent rubber elasticity. Also,
The adhesive may be cut into a tape shape and then attached to form an adhesive portion.

The adhesive portion is preferably covered with a sheet obtained by coating a thin paper, which is generally used as a release paper, with a silicone resin, or a sheet obtained by coating a plastic film with a silicone resin. By doing so, it is possible to prevent the adhesive portion from being soiled or peeled off during storage.

(9) Is the adhesive portion formed as a band-like member that passes near the peripheral portion of the through hole?
Alternatively, the auxiliary sheet for absorbent articles according to (8), which is formed along the peripheral portion.

In the auxiliary sheet for absorbent articles according to the present invention, the adhesive portion is provided in the vicinity of the through hole or in the periphery thereof. Therefore, the adhesion of the labia to the through holes is enhanced, and body fluid (especially menstrual blood) flowing out from the labia.
Can be further prevented from diffusing. In addition, when the position of the through hole is displaced as in the above (6), it is preferable that the position of the adhesive portion is also displaced accordingly.

In particular, in order to prevent the adhesive from adhering to the pubic hair existing in front of the labia, it is preferable to dispose one strip-shaped adhesive portion near each side edge of the through hole, and more preferably. Are preferably arranged within a range of 1 to 5 mm width.

(9) An elastic sheet is attached to the side surface of the body of the absorbent article auxiliary sheet, and the adhesive portion is provided on the elastic sheet (7) or (8). ) Auxiliary sheet for absorbent articles as described in 1).

In the absorbent article auxiliary sheet according to the present invention as described above, the adhesive portion is provided on the elastic sheet. Since such an elastic sheet has resilience and resilience with a repulsive feeling, the wearer can perform the wearing operation while maintaining the original shape of the wearing. Therefore, when the auxiliary sheet for absorbent articles is attached to the skin, it is possible to prevent the pressure-sensitive adhesives from sticking to each other and causing wrinkles that are inconvenient to wear. As a result, it becomes possible to adhere the adhesive portion to the body in close contact, and it is possible to prevent a situation in which the wearing feeling is impaired by being worn with wrinkles.

It is preferable that the adhesive portion is divided into left and right portions with a space of 1 to 10 mm around the front and rear edges with the longitudinal center line as a boundary. By doing this,
It is necessary to prevent the auxiliary sheet for absorbent articles from moving after the wearer to follow the movements of the wearer, and the skin adhered to the auxiliary sheet for absorbent articles in the adhesive section may be caught. You can As a result, the feeling of wearing becomes favorable, and the detachment of the absorbent article auxiliary sheet attached to the body can be reduced.
Instead of separately arranging the adhesive portions in this way, it is also possible to arrange long grooves as described below.

(10) The auxiliary sheet for absorbent articles is characterized in that a plurality of long grooves having a concave shape are arranged in a row in the longitudinal direction in a range where the elastic sheet is attached. (9) An auxiliary sheet for absorbent articles as described above.

According to such an auxiliary sheet for absorbent articles according to the present invention, a plurality of long grooves having a concave shape are juxtaposed in the longitudinal direction in the range where the elastic sheet is attached to form a bellows shape. . For this reason, it is possible to prevent the bellows from spreading in the lateral direction following the movement of the wearer, and the skin adhered to the absorbent article auxiliary sheet at the adhesive portion being pulled.

The above-mentioned long grooves can be formed by performing a mechanical treatment by corrugating in the longitudinal direction of the auxiliary sheet for absorbent articles. The formation range of such long grooves is preferably within a range of 1 to 10 mm in width.

(11) A body fluid guide stem for guiding body fluid from the through-hole to the sheet-like absorbent article is provided so as to be connected to the through-hole (1) to (10). An auxiliary sheet for absorbent articles according to any one of the above.

According to the auxiliary sheet for absorbent articles of the present invention, the through holes provided in the auxiliary sheet for absorbent articles are
It is connected to the fluid guide stem that protrudes from the body side to the opposite side. Therefore, body fluid (particularly menstrual blood) flows down through the body fluid guide stem to the sheet-shaped absorbent article, and the body fluid can be reliably guided to the sheet-shaped absorbent article. .

The body fluid guide stem can be formed integrally with the absorbent article auxiliary sheet, for example, by bending a part of the absorbent article auxiliary sheet from the through-hole portion and extending it downward, It is also possible to form a sheet different from the auxiliary sheet for absorbent articles by transforming it into a shape suitable for the body fluid guide stem and attaching it.

The body fluid-inducing stem preferably has a tubular shape like a continuous tunnel without breaks. With such a shape, the flow of body fluid to the sheet-like absorbent article can be made smooth. The vertical cross-sectional shape of the body fluid guide stem is not particularly limited as long as it does not impede the flow of body fluid, such as a cylindrical shape, a cone shape, and an inverted cone shape.

When the body fluid guide stem is formed from another sheet, the size of the opening on the body side of the body fluid guide stem is the same as the size of the through hole, specifically, the size in the longitudinal direction is 9.
It is preferable that the length is 0 to 140 mm and the dimension in the lateral direction is 35 to 70 mm. Also, the height dimension is 10-40 mm
Is preferred. By forming the body fluid guide stem with such dimensions, body fluid can be reliably guided to the sheet-shaped absorbent article within the minimum range.

For the sheet forming the body fluid guide stem, it is preferable to use a material that is flexible and has a good bulky feel. The body fluid guide stem can be made of a single material, but is preferably made of a composite material having hydrophilic inside and hydrophobic outside. This is because the hydrophilic material on the inside is covered with the hydrophobic material on the outside to reduce the possibility that body fluid will flow out to the outside of the body fluid guide stem. This is because it is possible to more reliably direct the flow of body fluid to the article.

Examples of materials that can be used for such body fluid-derived stems include fiber sheets such as spunbond, meltblown, through air, point bond, and airlaid,
Or film, three-dimensional perforated film, breathable film,
Alternatively, a foam sheet or the like may be used alone or a composite material thereof may be used.

When the body fluid inducing stem is composed of a single material,
For example, in the case of a fibrous sheet in which a bi-layer fibrous web is integrated, the surface alone or a core-sheath structure of 1.1 to
3.3 dtex hydrophobic fibers are in the range of 10 to 25 g / m ² , fibers having a similar fiber structure on the back side and hydrophilic treatment 1.1 to 2.2 dtex fibers are 15 to 35 g / m ^2.
It is preferable to use a web formed in the range of m ² in the form of a sheet by the through air method. Specifically, PE / P
P is a composite synthetic fiber having a thickness of 2.2 dtex on the surface of 15 g / m ² and 25 g of a fiber having a thickness of 1.6 dtex on the back surface of which is subjected to a hydrophilic treatment. It is a 2.6 mm fiber sheet which is a through-air type sheet formed by integrating a fiber web having a basis weight of / m ² .

Another example of the material composed of a single material is a foam material having a closed cell structure. More specifically, a resin prepared by mixing PE / EVA in a ratio of 80/20 is foamed at a magnification of 15 times, cross-linked by electron irradiation, then half-cut in the thickness direction, and the surface side is skinned. Layer, the inner surface side of which is a cell layer, and the inner surface side of which is coated with a surfactant, and which has a thickness of 1.
5 mm foam material.

As the material when the composite material is used,
Preferred examples include those having a melt blown nonwoven fabric on the surface side and a fiber sheet having hydrophilic fibers mixed on the inner surface side. Specifically, the surface side is made of PP meltblown non-woven fabric 15 to 30 g / m ² , and the inner surface side is made hydrophilic with PE / PP composite synthetic fiber 2.2 dtex and regenerated cellulose fiber 1.5 dtex 70 pairs. 20-40g / by weight mixing of 30 and obtained by hydroentangling method
A non-woven fabric sheet of m ² having a joint area ratio of 13% is mentioned. More specifically, the nonwoven fabric sheet in which the meltblown nonwoven fabric is 25 g / m ^2, obtained by hydroentangling is intended to be composed of 25 g / m ^2.

Another example of the construction of a plurality of materials is a table.
3D foam film on the front side and hydrophilic on the inner side
The ones applied with a melt-blown nonwoven fabric that has been treated are listed.
You can Specifically, the composition of the foam film is
0.915g / cm^ThreeLDPE resin and titanium oxide 5
% Content is the main component, and the basis weight is 20 g / m ^Two
The cross-sectional shape is tapered.
None, surface porosity 55%, hole size 0.28 mm
²Has become. On the inner surface side of this foam film, P
Melt blown fiber containing P as a component 25 g / m^TwoMelt
Heat embossed in a state of being sprayed or sheeted
Attach it. For meltblown fibers or fiber sheets
Is sprayed with a surfactant to impart hydrophilicity.
It is coated properly.

(12) The body fluid-inducing stem has a bottomed shape with the bottom side facing away from the body (1)
1) The auxiliary sheet for absorbent articles as described above.

According to the auxiliary sheet for absorbent articles of the present invention, the body fluid guide stem provided on the side opposite to the body has a bottomed shape. Therefore, the body fluid (particularly menstrual blood) introduced into the body fluid-derived stem is temporarily stored therein.
As a result, even if a large amount of body fluid is excreted and the amount exceeds the liquid passing performance of the surface of the sheet-shaped absorbent article located on the non-body side of the auxiliary sheet for absorbent articles, the body fluid is absorbed in sheet form. It is prevented from leaking out of the sexual article.

As described above, by using the sheet-like absorbent article in combination with the auxiliary sheet for absorbent articles according to the present invention, the sheet-like absorbent article has an enhanced adaptability of its liquid passage performance. It becomes.

In the present invention, the shape of the bottom surface and the shape of the opening of the body fluid guide stem may not be the same.
For example, a conical shape in which the bottom surface shape gradually expands or a bowl shape in which the bottom surface shape gradually contracts may be used.

(13) Strip-shaped fixing tabs for fixing to the sheet-shaped absorbent article are attached to both sides in the longitudinal direction of the auxiliary sheet for absorbent articles (1) ) To (12), the auxiliary sheet for absorbent articles.

In such an auxiliary sheet for absorbent articles according to the present invention, strip-shaped fixing tabs for fixing to the sheet-shaped absorbent article are attached to both sides in the longitudinal direction thereof. Therefore, the wearer can fix the auxiliary sheet for absorbent articles to the sheet-shaped absorbent article by picking up the fixing tab and winding it around the sheet-shaped absorbent article. is there. As described above, according to the present invention, since it is possible to integrate the auxiliary sheet for absorbent articles and the sheet-shaped absorbent article, it is possible to prevent the diffusion of body fluid (especially menstrual blood) and the prevention of rough skin. The sheet-shaped absorbent article can be surely secured.

The length of the fixing tab is 15 in the longitudinal direction.
It is preferable that the range is ˜35 mm and the lateral direction is 10 to 20 mm. With such a size, the operability is good and the size is sufficient for fixing to a sheet-shaped absorbent article.

The sheet-shaped absorbent article to which the auxiliary sheet for absorbent articles according to the present invention is attached has a thickness of 1 to 5 m.
A thin sanitary napkin of about m is preferable. While such a thin sanitary napkin provides a comfortable feeling to the wearer while wearing it, it is easy to create a gap between the labia and the thin sanitary napkin, so There is a risk that body fluid may flow and cause lateral leakage of body fluid. In this regard, by interposing the auxiliary sheet for absorbent articles according to the present invention, a gap does not occur between the labia and the thin sanitary napkin and the flow direction of the body fluid is specified, so that lateral leakage of the body fluid occurs. It gets harder. In this way, by using together with the auxiliary sheet for absorbent articles according to the present invention, the risk of leakage of body fluid is reduced while enjoying comfort.

[0094]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the auxiliary sheet for absorbent articles of the present invention will be described with reference to the drawings.

[Basic Structure] First, the structure of the absorbent article auxiliary sheet of the present embodiment will be described. FIG. 1 is a schematic perspective view showing an absorbent article auxiliary sheet (hereinafter referred to as an auxiliary sheet) 1 in the present embodiment, and FIG. 2 is a front view for explaining a contact state between a sanitary napkin 10 and a labia 6. FIG.

The auxiliary sheet 1 of this embodiment is used by being attached to the body side surface of a sheet-shaped absorbent article such as a sanitary napkin, and is worn with body fluid (especially menstrual blood) absorbed by the sanitary napkin or the like. This is to prevent direct contact with the person's skin. Based on such a function, the auxiliary sheet 1 has a size smaller than that of the sanitary napkin, and its appearance is substantially elliptical in shape so that it fits in the wearer's inner thigh. There is. As shown in FIG. 1, the auxiliary sheet 1 is provided with an elliptical through hole 2 in the center thereof and an adhesive portion 3 near the peripheral edge of the through hole 2 on the body side surface. Since the through hole 2 has a size that allows the oblong labia to be inserted comfortably, the wearer can easily fit the pair of labia into the through hole 2. Further, since the through-hole 2 has the oblong shape as described above, menstrual blood flowing along the labia, which is generally elongated, flows from the through-hole 2 to the sanitary napkin (not shown). Will be surely introduced. Therefore, it is possible to reduce the direct contact of menstrual blood with the skin and to suppress the residual diffusion of menstrual blood widely. This can reduce the occurrence of rough skin when the sanitary napkin is attached.

The outer dimensions of the auxiliary sheet 1 are preferably in the range of 80 to 200 mm in the longitudinal direction, and more preferably in the range of 130 to 180 mm. Also,
The dimension in the lateral direction is preferably 40 to 90 mm, more preferably 50 to 70 mm. With such a size, the size can be made suitable for attachment to a sanitary napkin or the like.

When the auxiliary sheet 1 according to the present invention is mounted, as shown in FIG.
Will be fitted into. Therefore, unlike the case where the sanitary napkin 10 as shown in FIG. 2 (B) is used alone, the labia 6 hardly touches the menstrual blood absorbed in the sanitary napkin 10, and the rough skin can be prevented. Will be planned. By increasing the thickness of the auxiliary sheet 1, it is possible to make the non-contact between the labia 6 and the sanitary napkin 10 more reliable.

[Modification of Through Hole] Next, a modification of the auxiliary sheet 1 of the present embodiment will be described. FIG. 3 is a vertical cross-sectional view showing a state in which the auxiliary seat 1 of the present embodiment having a through hole 2 in the center is viewed from the side of the wearer's body, and FIG. Auxiliary sheet 1 with 2 biased
FIG. 5 is a view showing the auxiliary sheet 11 in which the through hole 12 is biased rearward and the front region 11a is laterally widened.

As shown in FIG. 3, generally, there is a pubic hair portion 7 in which a large amount of pubic hair is present in the anterior region of the labia 6 (near the pubic bone). May be disturbed and a gap may be generated. In addition, there is a risk that menstrual blood will spread along the pubic hair interposed in this gap.

Therefore, instead of arranging the through hole 2 in the central portion as in the auxiliary sheet 1 shown in FIG. 1, the through hole 2 is moved toward the rear end portion of the auxiliary sheet 1 as shown in FIG. By arranging it, the front region 11a that comes into contact with the pubic hair portion during wearing is lengthened so that the diffused menstrual blood is absorbed in the front region 11
It can be received by a and the menstrual leak can be reduced. In addition, it is preferable that the arrangement of the adhesive portion 3 is also displaced along with the deviation of the arrangement of the through holes 2, so that the adhesive does not adhere to the pubic hair.

Further, as shown in FIG. 5, the positions of the through hole 12 and the adhesive portion 13 in the auxiliary sheet 11 can be biased rearward, and the front region 11a can be made wide. With such a shape, the area where the auxiliary sheet 11 comes into contact with the pubic hair becomes wider, and even if menstrual blood that leaks out from the labia comes in contact with the pubic hair and diffuses, it has a large area. It is possible to receive this in the front area 11a.

[Longitudinal Section Structure of Auxiliary Sheet] Next, the longitudinal section structure of the auxiliary sheet 1 as viewed from the front will be described. FIG. 6 shows the auxiliary sheet 1 of this embodiment, and the soft touch sheet 4
FIG. 7 is a vertical cross-sectional view for explaining a two-layer structure including the liquid-impermeable sheet 5 and FIG. 7 is an auxiliary sheet 1 of the present embodiment.
FIG. 11 is a vertical cross-sectional view showing another cross-sectional structure of No. 3 and illustrating the auxiliary sheet 21 having a three-layer structure in which the liquid impermeable sheet 25 is sandwiched by the soft touch sheets 24A and 24B.

As shown in FIG. 6, the auxiliary sheet 1 of this embodiment has the soft touch sheet 4 on the side in contact with the skin.
It has a two-layer structure in which the liquid impermeable sheet 5 is arranged on the side in contact with the sanitary napkin, and these are joined by an adhesive or heat seal. While the soft-touch sheet 4 makes the wearer feel comfortable to wear, the liquid-impermeable sheet 5 can prevent re-contact between menstrual blood rewet by pressure and the skin.

As in the auxiliary sheet 21 shown in FIG. 7, a soft touch sheet 24A having a liquid impermeable sheet 25 arranged on the side in contact with the skin and a soft touch sheet 24B arranged on the side in contact with the sanitary napkin. It is also possible to have a three-layer structure by sandwiching. In such a structure, the soft touch sheet 24 in contact with the skin
A gives the wearer a comfortable wearing feeling, and the soft touch sheet 24B in contact with the sanitary napkin absorbs the rewet menstrual blood and blocks the flow of the menstrual blood.

[Modified Example of Adhesive Section] Next, a modified example of the adhesive section 3 of the auxiliary sheet 1 of the present embodiment will be described. Figure 8
FIG. 3 is a schematic perspective view showing an auxiliary sheet 31 in which an elastic sheet 36 is attached to the auxiliary sheet 31 and an adhesive portion 33 is provided on the elastic sheet 36. Figure 9
FIG. 6 is a schematic perspective view showing an auxiliary sheet 41 in which a plurality of long grooves 47 having a concave shape in the longitudinal direction are arranged side by side in a row in a range where the elastic sheet 46 is attached.

The adhesive portion may be provided directly on the side surface of the body of the auxiliary sheet, but may be provided with elasticity in order to prevent the adhesives from adhering to each other. For example, as shown in FIG. 8, the elastic sheet 36 can be attached to a region of the auxiliary sheet 31 that covers the through hole 32 and the two adhesive portions 33 provided around the through hole 32. By doing so, the adhesive portion 33 has elasticity, and the wearing operation is easy for the wearer.

When the elastic sheet 36 is mounted over the entire area of the auxiliary sheet 31 in the longitudinal direction as in this embodiment, the portion corresponding to the through hole 32 is the through hole 3
The elastic sheet 36 is hollowed out in the same size as 2.

Further, as shown in FIG. 9, in the range where the elastic sheet 46 is attached, when a plurality of long grooves 47 having a concave shape in the longitudinal direction are arranged side by side in a row to form a bellows shape, The auxiliary sheet 41 is deformed into a flat shape by widening the width dimension in the lateral direction according to the movement of the wearer. For this reason, it is possible to prevent the skin adhered by the adhesive from being pulled along with the motion of the wearer. In addition,
The long groove 47 is formed by corrugating by mechanical processing.

[Body fluid-derived stem] Next, the body fluid-derived stem will be described. FIG. 10 shows an auxiliary sheet 5 in which a part of the auxiliary sheet 51 is extended to the non-body side to form a tubular body fluid guide stem 58.
1 is a vertical cross-sectional perspective view of FIG. 1, FIG. 11 is an explanatory view for explaining a state in which the side of the body fluid guide stem 58 opposite to the body contacts the sanitary napkin 50, and FIG. FIG. 13 is a vertical cross-sectional view seen from the front, and FIG. 13 is a vertical cross-sectional perspective view of an auxiliary sheet 61 having a bottomed body fluid guide stem 68 attached to the surface on the side opposite to the body.

The auxiliary sheet 1 according to the present embodiment may have a body fluid guide stem in order to make the prevention of menstrual blood diffusion more effective. For example, as shown in FIG. 10, a part of the auxiliary sheet 51 having a two-layer structure of the soft touch sheet 54 and the liquid impermeable sheet 55 is bent from the portion of the through hole 52 to extend downward, and the extension is performed. At the protruding portion, a body fluid guide stem 58 is formed. With such a structure, menstrual blood flowing out from the labia fitted into the through hole 52 and the body fluid guide stem 58 connected thereto passes through the body fluid guide stem 58 in a sanitary napkin (not shown).
Therefore, residual diffusion of menstrual blood in the vicinity of the labia can be effectively prevented. In addition,
In the present embodiment, the body fluid guide stem 58 is the auxiliary sheet 5.
Since it is formed integrally with 1, the connection between the two is strong,
Further, the manufacturing process can be facilitated by omitting the joining process.

The auxiliary sheet 51 is attached to the inner crotch of the wearer by the adhesive portion 53, and the sanitary napkin 50 is attached to the underwear. And by wearing underwear, FIG.
As shown in, the body fluid guide stem 58 of the auxiliary sheet 51 comes into contact with the sanitary napkin 50.

It is also possible to bond the body side surface of the body fluid guide stem 58 and the body side surface of the sanitary napkin 50 with an adhesive. By doing so, the body fluid guide stalk 58 can be fixed to a suitable position on the sanitary napkin 50, so that the body fluid guide stalk 58 is prevented from being displaced due to the movement of the wearer. You can

When the auxiliary sheet 51 of this embodiment is attached, as shown in FIG. 12, the labia 6 is more reliably separated from the sanitary napkin 50 than in the case of FIG. 2 (A) described above. It is possible to secure contact.

Further, as shown in FIG. 13, a sheet having a shape that does not protrude from the outer contour of the auxiliary sheet 61 and that has an opening 68a of at least approximately the same shape as the through hole 62 is separately attached, and It is also possible to use a bottom-shaped body fluid guide stem 68. In this case, even if the excretion amount of menstrual blood exceeds the liquid passage performance on the surface of the sanitary napkin (not shown), the body fluid guide stem 68 has the bottomed portion 6
Since 8b is provided, menstrual blood is temporarily stored inside the body fluid guide stem 68, and the adaptability of the sanitary napkin to the fluid passage performance is increased.

Next, the auxiliary sheet to which the belt-shaped fixing tabs are attached will be described. FIG. 14 is a schematic perspective view showing an auxiliary sheet 71 having a fixing tab 79, and FIG. 15 shows the fixing tab 79 and a sanitary napkin 70.
It is a schematic perspective view which shows the state which fixed the auxiliary sheet 71 to. FIG. 16 is a schematic perspective view showing a state in which the auxiliary sheet 71 is fixed to the sanitary napkin 80 having another shape.

In the present embodiment, as shown in FIG. 14, on both sides of the auxiliary sheet 71 in the longitudinal direction,
A fixing tab 79 that can be picked by the wearer's fingers is attached so as to extend from both left and right edges. According to this structure, as shown in FIG. 15, this fixing tab 7
By winding the sanitary napkin 70 at 9,
The auxiliary sheet 71 can be firmly fixed to the sanitary napkin 70.

Although the adhesive portion 73 is provided around the through hole on the auxiliary sheet 71 in this embodiment, the adhesive portion may be omitted in consideration of operability at the time of attachment. It is possible.

In this embodiment, the shape of the sanitary napkin 70 is substantially elliptical like the auxiliary sheet 71, but the shape of the sanitary napkin is not particularly limited to this and is shown in FIG. It may be a generally widely used rectangular shape such as the sanitary napkin 80.

[Biodegradable / Water-Dispersible / Water-Soluble Material] The auxiliary sheet of the present invention has a material and a structure which can be disposed in a flush toilet for treatment in order to easily and cleanly dispose of after use. Can also be For that purpose, it is necessary to be composed of a material having biodegradability and / or water dispersibility and / or water solubility.

The term "biodegradable" means that, in the presence of fungi, bacteria, actinomycetes and other microorganisms, according to natural processes, the substance is a gas such as carbon dioxide or methane under anaerobic or aerobic conditions, water and Biodegradability means the biodegradability of the substance (biodegradation rate, degree of biodegradation, etc.)
Is comparable to naturally occurring materials such as fallen leaves, or synthetic polymers that are generally recognized as biodegradable under the same environment.

The term "water dispersibility" has the same meaning as water decomposability, and although a limited amount of water (menstrual blood) at the time of use has no effect, in a large amount of water or a stream of water, the fibers are separated from each other. , Refers to the property of being easily dispersed into small pieces that do not clog at least ordinary toilet piping. The term "water-soluble" refers to the property of being soluble in a large amount of water or a stream of water, although it is not affected by a limited amount of water (menstrual blood) during use.

The material / structure is not particularly limited as long as it satisfies the above conditions, but the following may be mentioned as examples.

Natural fibers and / or chemical fibers can be used as the fibers for the liquid-permeable material. Examples of natural fibers include tissue, crushed pulp, air-laid pulp chemically bonded with a water-soluble resin, cotton, and the like. Examples of chemical fibers are rayon,
Examples of regenerated cellulose such as fibril rayon and synthetic fibers include synthetic fibers obtained by subjecting PE, PP, PET, ethylene vinyl acetate copolymer and the like to hydrophilic treatment, and examples of synthetic biodegradable fibers include polylactic acid. Examples of water-soluble materials such as polybutylene succinate and the like include carboxymethyl cellulose, polyvinyl alcohol and the like. Among the above materials, it is preferable to use natural fibers such as pulp and cotton and biodegradable fibers such as rayon and polylactic acid.

The above materials may be used alone or in a mixture to form a web or a nonwoven fabric. Web forming of so-called biodegradable fibers such as polylactic acid and polybutylene succinate is carried out by a card method, a spun bond method, a dry method or a wet method by a melt blown method or an airlaid method, or a combination thereof. Good. Examples of the bonding method include thermal bonding, needle punching, and chemical bonding, but are not limited to these methods. Alternatively, spunlace formed into a sheet by the hydroentangling method may be used.

As an example of the molding method having water dispersibility,
A method of forming fibers into a sheet by hydrogen bonding between fibers to form a hydrolyzed paper, a method of forming fibers into a sheet by combining fibers with a water-soluble binder, or a sheet of entangled fibers And a method of forming it into a hydrolyzed paper.

In order to have good water dispersion performance, the fiber length dimension is preferably in the range of 2 to 51 mm, more preferably in the range of 2 to 10 mm.
Further, the fineness (thickness) is 1.1 to 4.4 in order to have both water dispersibility and strength that does not cause damage during use.
It is preferable to select from the range of dtex. In particular, when rayon is used as the fiber, its fineness is 1.1.
It is preferably in the range of to 3.3 dtex. If it is less than this range, the water dispersibility is good, but fluffing and bleeding easily occur during drying, while if it exceeds this range, the water dispersibility is significantly reduced.

Examples of the material of the liquid impermeable material include cellulose derivatives such as methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose, polyvinyl alcohol, sodium alginate, sodium polyacrylate, polyacrylic ether, polyvinylpyrrolidone, isobutylene and maleic anhydride. Examples thereof include water-soluble polymers such as copolymers, and biodegradable polymers such as polylactic acid, polybutylene succinate, starch and dextrin. Is mentioned.

The above materials may be used alone or in combination with the above materials to form a film sheet. Furthermore, a water-repellent material such as a silicone resin may be applied to the film sheet or mixed,
Further, a non-woven fabric made of the above material may be laminated.

<Joining Method> For joining sheets, it is possible to use a joining method such as adhesion with water-soluble or water-swelling polyvinyl alcohol or the like, heat sealing, or hydrogen bonding alone or in combination. it can.

<Elastic Material> As a material for giving elasticity to the auxiliary sheet 1, natural rubber (cis-1,4-polyisoprene) can be cited as an example of the material having biodegradability.
Natural rubber is believed to undergo subsequent degradation processes such as chain splitting, molecular weight reduction, etc. by facilitating attack by oxygen and / or either microorganisms or fungi. Alternatively, it may be a water-soluble elastomer or the like.

[0132]

EFFECT OF THE INVENTION The auxiliary sheet for absorbent articles according to the present invention as described above remarkably increases the contact area between the sheet-shaped absorbent article such as sanitary napkin and the wearer's body. It suppresses rewetting of the skin due to rewetting and reduces the induction of rough skin caused by re-contact with body fluid such as menstrual blood.

Further, by fitting the labia into the through holes, diffusion of body fluid is prevented, rough skin is prevented from occurring over a wide area, and leakage of body fluid from the sheet-like absorbent article is reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an auxiliary sheet for absorbent articles according to the present embodiment.

FIG. 2 is an explanatory diagram for explaining a contact state between a sanitary napkin and a labia.

FIG. 3 is a diagram showing a mounted state of the auxiliary sheet for absorbent articles of the present embodiment.

FIG. 4 is a schematic perspective view showing a modified example of the auxiliary sheet for absorbent articles according to the present embodiment, the auxiliary sheet for absorbent articles having through-holes arranged near the rear end portion in the longitudinal direction.

FIG. 5 is a schematic perspective view showing a modified example of the auxiliary sheet for absorbent articles according to the present embodiment, which shows an auxiliary sheet for absorbent articles having a larger front area.

FIG. 6 is an explanatory diagram showing a cross-sectional structure of the absorbent article auxiliary sheet according to the present embodiment and illustrating a two-layer structure of a soft touch sheet and a liquid impermeable sheet.

FIG. 7 is a vertical cross-sectional view showing another cross-sectional structure of the absorbent article auxiliary sheet according to the present embodiment, and illustrating a three-layer structure in which a liquid impermeable sheet is sandwiched between soft touch sheets.

FIG. 8 is a modification of the auxiliary sheet for absorbent articles according to the present embodiment, in which an elastic sheet is attached,
It is a schematic perspective view which shows the auxiliary sheet for absorbent articles in which the adhesive part is provided on the said elastic sheet.

FIG. 9 is a modified example of the auxiliary sheet for absorbent articles according to the present embodiment, in which a plurality of long grooves having a concave shape in the longitudinal direction are arranged side by side in a row in the range where the elastic sheet is attached. It is a schematic perspective view which shows the auxiliary sheet for articles.

FIG. 10 is another embodiment of the auxiliary sheet for absorbent articles according to the present embodiment, in which the auxiliary sheet for absorbent articles has a cylindrical body fluid guide stem that is partially extended to the sanitary napkin side. FIG.

FIG. 11 is an explanatory diagram for explaining a state in which the absorbent article auxiliary sheet has a part of a body fluid guide stem and the non-body side surface of the body fluid guide stem contacts a sanitary napkin.

FIG. 12 is a vertical cross-sectional view seen from the front showing a mounted state of an auxiliary sheet for absorbent articles, a part of which is a body fluid guide stem.

FIG. 13 is a vertical cross-sectional view of an auxiliary sheet for absorbent articles to which a bottomed body fluid guide stem is attached.

FIG. 14 is a schematic perspective view showing an auxiliary sheet for absorbent articles in which strip-shaped fixing tabs are attached to the auxiliary sheet for absorbent articles of the present embodiment.

FIG. 15 is a schematic perspective view showing a state in which the absorbent article auxiliary sheet of the present embodiment is attached to a sanitary napkin by a fixing tab.

FIG. 16 is a schematic perspective view showing a state in which the auxiliary sheet for absorbent articles of the present embodiment is fixed to a sanitary napkin of another shape by a fixing tab.

[Explanation of symbols]

1, 11, 21, 31, 41, 51, 61, 71 Auxiliary sheet for absorbent article 2, 22, 32, 42 Through hole 3, 13, 23, 33, 43, 53, 73 Adhesive part 4, 24A, 24B , 54 Soft touch sheet 5, 25, 55 Liquid impermeable sheet 10, 50, 70, 80 Sanitary napkin 36, 46 Elastic sheet 47 Recessed long groove 58, 68 Body fluid guide stem 79 Fixing tab

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // A61F 5/455 (72) Inventor Koichi Yamaki 1531-7 Takasuka Wadahama, Toyohama-cho, Mitoyo-gun, Kagawa Uni Charm Co., Ltd. Technical Center (72) Inventor Yuki Noda 1531-7 Takasuka Wadahama, Toyohama Town, Mitoyo-gun, Kagawa Uni-Charms Co., Ltd. HA06 4C098 AA09 CC24 CC29 CC37 CE02 CE08 CE14 DD01 DD03 DD06 DD10 DD12 DD13 DD22 DD23 DD25 DD30

Claims (13)

[Claims] 1. An auxiliary sheet for an absorbent article, which is used together with a sheet-shaped absorbent article and complements the function of the sheet-shaped absorbent article or imparts a new function to the sheet-shaped absorbent article, the absorbent sheet comprising: The auxiliary sheet for articles is provided with a through hole that allows a predetermined range of the labia to fit comfortably, and the depth of the through holes is such that the through holes of the auxiliary sheet for absorbent articles are fitted to the pair of labia. An auxiliary sheet for absorbent articles, wherein the pair of labia is sometimes set to have a depth larger than the depth of fitting into the through hole. 2. The absorbent sheet according to claim 1, wherein the auxiliary sheet for absorbent articles has a single-layer or multi-layer structure in which a liquid-impermeable sheet and / or a soft touch sheet is used as a unit. Auxiliary sheet for goods. 3. The auxiliary sheet for absorbent articles according to claim 2, wherein the liquid-impermeable sheet has air permeability. 4. The auxiliary sheet for absorbent articles according to claim 2, wherein the soft touch sheet is a non-woven sheet and / or a foam sheet. 5. The auxiliary sheet for absorbent articles according to claim 1, wherein the through-hole has an oblong opening. 6. The through hole is arranged so as to be offset to either one of both ends in the longitudinal direction of the auxiliary sheet for absorbent articles. An auxiliary sheet for absorbent articles as described above. 7. The absorbent article according to claim 1, wherein the auxiliary sheet for absorbent articles has an adhesive portion on the side surface of the body for adhering to the body of the wearer. Auxiliary sheet. 8. The adhesive portion is formed as a belt-like member that passes near a peripheral portion of the through hole, or is formed along the peripheral portion. Item 8. An auxiliary sheet for absorbent articles according to item 7. 9. The elastic sheet is attached to a body side surface of the absorbent article auxiliary sheet, and the adhesive portion is provided on the elastic sheet. Auxiliary sheet for absorbent articles. 10. The absorbent article auxiliary sheet is characterized in that, in the range where the elastic sheet is attached, a plurality of concave long grooves are arranged side by side in a row in the longitudinal direction. The auxiliary sheet for absorbent articles according to claim 9. 11. The body fluid guide stem for guiding body fluid from the through hole to the sheet-like absorbent article is provided so as to be connected to the through hole.
An auxiliary sheet for absorbent articles according to any one of the above. 12. The auxiliary sheet for absorbent articles according to claim 11, wherein the body fluid guide stem has a bottomed shape with the bottom side facing away from the body. 13. A strip-shaped fixing tab for fixing the auxiliary sheet for absorbent articles to the sheet-shaped absorbent article is attached to both sides in the longitudinal direction of the auxiliary sheet for absorbent article. 12. The auxiliary sheet for absorbent articles according to any one of 1 to 12.