JP2020137667A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which can optimize displacement stop property of a rear surface sheet side according to an underwear to be used.SOLUTION: An absorbent article comprises: a front surface sheet arranged on a skin side in wearing; a rear surface sheet provided on an underwear side; and an absorber arranged between the front surface sheet and the rear surface sheet. On the rear surface sheet side, a displacement stop material for suppressing displacement to an underwear, and a release sheet comprising openings and/or notches for partially exposing the displacement stop material are provided. Peeling the release sheet can change displacement stop property of the rear surface sheet side.SELECTED DRAWING: Figure 2A

Description

The present invention relates to an absorbent article.

Sanitary napkins, panty liners, incontinence pads and the like are known as absorbable articles. Such an absorbent article has a basic structure including a front surface sheet, a back surface sheet, and an absorber provided between the two front surface sheets. Further, many of the absorbent articles are provided with a slip-preventing material on the back sheet side for suppressing the slip of the absorbent article from the underwear (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 7-88129

Conventionally, many users have used absorbent articles by attaching them to special underwear called sanitary shorts (sanitary shorts) or the like. For such special underwear, a highly liquid-proof sheet or the like is usually used as a material for the crotch portion or the like. In many cases, the above-mentioned anti-slip material is configured so that the anti-slip function for the liquid-proof sheet or the like is satisfactorily exhibited and the attachment / detachment is also good.

However, in recent years, an increasing number of users are wearing absorbent articles on ordinary underwear without using special underwear. Unlike special underwear, ordinary underwear is often made of fabric such as woven fabric or knitted fabric, for example, in the crotch part as well as other parts. Therefore, especially when the anti-slip material is composed of an adhesive part, the adhesive force of the anti-slip material to the underwear fabric becomes excessively strong depending on the composition of the fabric and the type of fiber material, and the absorbent article is peeled off from the underwear after use. It may be difficult. Therefore, regardless of the type of underwear, there is a demand for an absorbent article that can be attached to and detached from the underwear.

In view of the above points, one aspect of the present invention is to provide an absorbent article capable of optimizing the anti-slip property on the back sheet side according to the underwear used.

The first aspect of the present invention has a front surface sheet arranged on the skin side at the time of wearing, a back surface sheet arranged on the underwear side, and an absorber provided between the front surface sheet and the back surface sheet. An absorbent article having a slip-preventing material for suppressing slippage with respect to the underwear and a release sheet having an opening and / or a notch for partially exposing the slip-preventing material on the back surface sheet side. By providing, the slip prevention property on the back surface sheet side can be changed by peeling off the release sheet.

According to the first aspect, the slip prevention property on the back surface sheet side can be changed by peeling off the release sheet. More specifically, before peeling off the release sheet, the release sheet partially covered the anti-slip material and was exposed at a part other than the opening and / or notch, and the release sheet was peeled off. Later, it is possible to create a second state in which the exposed area of the slip prevention material is larger than that in the first state. Therefore, when using the absorbent article, the user can select whether to peel off the release sheet or not depending on the type of underwear, and can easily create a desired anti-slip property on the back surface sheet side.

For example, when using ordinary underwear in which the same knitting or woven fabric as other parts is used without using a special material for the crotch part, etc., if the slip prevention material consists of an adhesive part, the composition of the fabric And depending on the fiber material, the adhesive force of the slip stopper to the underwear fabric tends to be excessively large. In such a case, the user can put the absorbent article on the underwear without peeling off the release sheet and putting it in the first adhesive state without partially exposing the slip stopper. As a result, the absorbent article can be used in a state where the adhesive force is weakened and the adhesive force to ordinary underwear is optimized, and it is possible to prevent inconveniences such as difficulty in peeling off the absorbent article when it is removed. Can be done. On the other hand, when the user uses a special underwear in which a waterproof sheet or the like is arranged on the crotch part, the second adhesive state is set by a simple operation of peeling off the release sheet, and the slip prevention material is compared with the first adhesive state. Can increase the exposure of. As a result, it is possible to use the absorbent article in the second adhesive state in which the adhesive force is increased as compared with the first adhesive state, that is, in the state where the adhesiveness to the special underwear is optimized.

In the second aspect of the present invention, it has a front surface sheet arranged on the skin side at the time of wearing, a back surface sheet arranged on the underwear side, and an absorber provided between the front surface sheet and the back surface sheet. It is an absorbent article, and is provided with a slip-preventing material for suppressing slippage with respect to underwear when attached and a peeling sheet that covers the slip-preventing material and has a detachable portion on the back surface sheet side. The slip prevention material can be partially exposed by removing such a portion, and the slip prevention property on the back surface sheet side can be changed by peeling off the release sheet.

According to the second aspect, the release sheet has a portion that can be removed when the package is opened. Therefore, the user can create a state in which the release sheet partially covers the anti-slip material by removing the detachable portion. Then, by further peeling off the release sheet, the slip prevention property on the back sheet side can be changed. More specifically, before the release sheet is peeled off, the release sheet partially covers the anti-slip material and is exposed from the openings and / or notches formed after the detachable portion is removed. It is possible to create a state and a second state in which the exposed area of the slip prevention material is increased from the first adhesive state after the release sheet is peeled off. Therefore, when using the absorbent article, the user can select whether to peel off the release sheet or not depending on the type of underwear, and can easily create a desired anti-slip property on the back surface sheet side.

In the third aspect of the present invention, the release sheet is covered, and the detachable portion and the bonded outer sheet are further provided.

According to the third aspect, the outer sheet covering the release sheet is provided, and the detachable portion of the release sheet is adhered to the outer sheet. Thereby, the detachable portion of the release sheet can be removed together with the outer sheet by a simple operation of peeling the outer sheet. Therefore, when the outer sheet is peeled off, the release sheet can partially cover the slip prevention material so that the slip prevention material is partially exposed, and this state is before the release sheet is peeled off. It becomes the first state. Further, by peeling off the release sheet, a second state after the release sheet is peeled off can be created, and different anti-slip properties can be formed.

In the fourth aspect of the present invention, the release sheet is a continuous sheet.

According to the fourth aspect, since the release sheet is a continuous sheet, the release sheet can be peeled off at a time (in one operation). Therefore, the slip prevention property on the back sheet side can be changed more easily.

In the fifth aspect of the present invention, the slip prevention material has at least a first portion and a second portion having a slip prevention property different from that of the first portion, and by peeling off the release sheet, the first portion is described. The ratio of the exposed area of one portion to the exposed area of the second portion can be changed.

According to the fifth aspect, the slip prevention material has at least two portions having different slip prevention properties, and the ratio of the exposed area of both portions can be changed by peeling off the release sheet. Thereby, the difference in the slip prevention property between the first state before the release sheet is peeled off and the second state after the release sheet is peeled off can be made more remarkable. Therefore, even if the optimum anti-slip property for two different types of underwear cannot be obtained only by the difference in the exposed area of the anti-slip material, the optimum anti-slip property according to the underwear can be obtained by this embodiment. it can.

In the sixth aspect of the present invention, there is an absorbent article according to the third aspect and a packaging sheet for packaging the absorbent article, and the packaging sheet is the outer sheet.

According to the sixth aspect, it is possible to provide an absorbent article having the same effect as that of the third aspect.

According to one aspect of the present invention, it is possible to provide an absorbent article capable of optimizing the anti-slip property on the back sheet side according to the underwear used.

It is a figure explaining the basic structure of the absorbent article in one form of this invention. FIG. 5 is a plan view of the absorbent article according to the first embodiment of the present invention as viewed from the back sheet side. It is a figure which shows the state which peeled off the release sheet of the absorbent article by 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II of FIG. 2A, which illustrates the configuration and function of the absorbent article according to the first embodiment of the present invention. It is a figure which shows the modification of the absorbent article by 1st Embodiment of this invention. It is a figure which shows the modification (the release sheet is omitted) of the absorbent article by 1st Embodiment of this invention. It is a figure which shows the modification of the absorbent article by 1st Embodiment of this invention. FIG. 5B is a sectional view taken along line II-II of FIG. 5B, which illustrates the configuration and function of the absorbent article according to the first embodiment of the present invention. FIG. 5 is a plan view of the absorbent article according to the second embodiment of the present invention as viewed from the back sheet side. FIG. 7 is a cross-sectional view taken along the line III-III of FIG. 7, which illustrates the configuration and function of the absorbent article according to the second embodiment of the present invention. A modification of the absorbent article according to the second embodiment of the present invention is shown. FIG. 9 is a diagram showing a state in which the packaging sheet of the absorbent article shown in FIG. 9A is peeled off. FIG. 9A is a sectional view taken along line IV-IV of FIG. 9A, which illustrates the configuration and function of the absorbent article according to the second embodiment of the present invention. A modified example of the absorbent article according to the second embodiment of the present invention is shown.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each drawing, unless otherwise specified, the same or corresponding configurations may be designated by the same reference numerals and the description thereof may be omitted. In addition, the drawings are schematic to help the understanding of the invention.

<Basic structure of absorbent articles>
First, the basic structure of the absorbent article according to one embodiment of the present invention will be described based on the example of a sanitary napkin. FIG. 1 shows a partially broken plan view of the absorbent article 1. As shown in FIG. 1, the absorbent article 1 has a back surface sheet 2, a front surface sheet 3, and an absorber 4 provided between the two sheets 2 and 3. When the absorbent article 1 is attached, the front surface sheet 3 side is the side that comes into contact with the skin (skin side or front surface side), and the back surface sheet 2 side is the side that is fixed to the underwear (underwear side or back surface side). Even if side non-woven fabrics 7 and 7 extending in the longitudinal direction are provided on both sides of the surface sheet 3 side of the absorbent article 1 so as to overlap both edges in the width direction of the absorber 4 in a plan view. Good.

As shown in FIG. 1, the absorbent article 1 has a predetermined length in the longitudinal direction D1 and a predetermined width in the width direction D2 orthogonal to the longitudinal direction D1, and has an elongated shape in the longitudinal direction as a whole. You can do it. The width of the absorbent article 1 is substantially constant in the illustrated example, but may vary over the longitudinal direction. As shown in FIG. 2A, the absorbent article 1 can have a shape that is substantially axisymmetric with respect to the center line extending in the longitudinal direction D1. Further, the structure of the absorbent article 1 (including the thickness and density of the absorber 4) may be substantially line-symmetrical or asymmetrical with respect to the center line.

The length (total length) of the absorbent article 1 in the longitudinal direction D1 is not particularly limited, but may be about 150 to 450 mm. The length (width) in the width direction D2 is also not particularly limited, but may be about 50 to 200 mm.

Although not provided in the absorbent article 1 according to the illustrated example, the absorbent article may be provided with so-called wings extending from both sides near the center of the longitudinal direction D1. Such a wing is intended to be folded toward the back surface side at the time of attachment and attached to the underwear to more reliably fix the absorbent article 1 to the underwear.

As the back sheet 2, a sheet material having at least water impermeability, such as an olefin resin sheet such as polyethylene or polypropylene, can be used. It is possible to use a laminated non-woven fabric in which a non-woven fabric is laminated on a polyethylene sheet or the like, or a laminated non-woven fabric sheet in which a waterproof film is interposed to ensure substantially impermeable liquid. Further, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability. Such a water-impervious / moisture-permeable sheet material is obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in the uniaxial or biaxial direction. A porous sheet or the like can be used.

The surface sheet 3 is a liquid-permeable sheet that rapidly permeates body fluids such as menstrual blood, vaginal discharge, and urine. As the surface sheet 3, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like is preferably used. As the material fibers constituting the non-woven fabric, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton can be used alone or. Two or more types can be used in combination. Further, examples of the non-woven fabric processing method include a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method and the like. Among these processing methods, the spunlace method is preferable in that it can produce a flexible non-woven fabric and the spunbond method is preferable in that it can produce a non-woven fabric having a high drape property, and the thermal bond method is preferable in that it can produce a bulky and soft non-woven fabric. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can also be used.

The absorber 4 is not limited as long as it is a material capable of absorbing and retaining body fluid, but preferably contains cotton-like pulp and a water-absorbing polymer. As the water-absorbent polymer, a superabsorbent polymer (SAP), a superabsorbent polymer fiber (SAF), and a combination thereof can be used. Examples of the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. As a raw material for chemical pulp, hardwood, softwood and the like are used, but softwood is preferably used because of its long fiber length and the like.

In addition, synthetic fibers may be mixed with the absorber 4. As the synthetic fiber, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used, and two of these can be mixed. It can also be used. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can also be used. In addition, it is also possible to use a hydrophobic fiber whose surface is treated with a hydrophilizing agent to give it an affinity for body fluids. The absorber 4 is preferably manufactured by a stacking fiber or an air raid method.

The thickness of the absorber 4 can be about 0.3 to 30 mm, preferably about 1.0 to 15 mm. The absorber 4 does not have to have a uniform thickness over the entire surface, and may have a structure in which a region corresponding to the body fluid discharge port and a region in the vicinity thereof are bulged.

The absorber 4 may be wrapped with an encapsulating sheet 5 made of crepe paper, a non-woven fabric, or the like in order to maintain its shape. By wrapping the absorber 4 with the encapsulating sheet 5, it is possible to prevent the absorber 4 from twisting or cracking. As the encapsulation sheet 5, uncolored (that is, white) crepe paper or non-woven fabric can be used, or colored ones can be used. When the colored packaged sheet 5 is used, the color of the packaged sheet 5 can be reflected as a light color even from the surface sheet 3 side. Therefore, the color of the discharged body fluid can be mixed with the reflected color of the encapsulating sheet 5 to make it inconspicuous. The encapsulating sheet 5 can be colored, for example, as a complementary color to the color of the body fluid. For example, in an absorbent article (sanitary napkin or the like) configured for the purpose of absorbing menstrual blood, the encapsulating sheet can be colored green, which is a complementary color of red.

As the side non-woven fabric 7, a non-woven fabric material that has been subjected to an appropriate water-repellent treatment or hydrophilic treatment can be used depending on the purpose of preventing the penetration of body fluids or enhancing the feeling of touch. The non-woven fabric material may be, for example, natural fiber, synthetic fiber, regenerated fiber or the like. A silicone-based, paraffin-based, or other water-repellent agent can be used for the water-repellent treatment of the side nonwoven fabric 7.

At the longitudinal edge of the absorbent article 1, the outer edges of the back surface sheet 2 and the front surface sheet 3 are joined by an adhesive such as hot melt or an adhesive means such as heat seal or ultrasonic seal. Further, at the edge portions on both sides of the absorbent article 1, the side nonwoven fabrics 7 and 7 and the back surface sheet 2 are joined by at least one of the above-mentioned adhesive means.

The absorbent article 1 may be formed with a pressing groove (also referred to as fit embossing) that is recessed from the front surface sheet 3 side to the back surface sheet 2 side. The squeeze groove can be formed by passing a laminate obtained by laminating the surface sheet 3 on the absorber 4 between a pair of pressure rolls. For example, a convex roll can be arranged on the surface sheet 3 side of the laminated body and a flat roll can be arranged on the absorber 4 side, and pressure can be applied by both rolls.

As shown in FIG. 1, a slip prevention material 9 can be provided on the back surface sheet 2 side of the absorbent article 1. The slip prevention material 9 is an element for suppressing the absorbent article 1 from being displaced from the underwear while the absorbent article 1 is attached to the underwear and used. Therefore, as shown in the drawing, it is preferable that the back surface sheet 2 is formed at least in a region other than the edge portions in the longitudinal direction D1 and the width direction D2. The slip prevention material 9 on the back surface sheet 2 side may be provided with a release sheet (described later) that covers the slip prevention material 9 at least partially and can be easily peeled off from the slip prevention material 9.

<First Embodiment>
FIG. 2A shows a plan view of the absorbent article 1A shown in FIG. 1 as viewed from the back sheet side (underwear side or back surface side). As shown in FIG. 2A, the absorbent article 1A is provided with a slip prevention material 9 on the back surface sheet 2 side. Further, the absorbent article 1A further includes a release sheet 30A that partially covers the slip prevention material 9.

As a material used for the slip prevention material, the absorbent article 1A can be suppressed from being displaced from the underwear during use (when attached), and the absorbent article 1A can be easily removed from the underwear after use. If it is a thing, it is not particularly limited. The anti-slip material 9 can be formed as an adhesive or non-adhesive layer. As the pressure-sensitive adhesive layer (adhesive portion), for example, a styrene-based polymer, a pressure-sensitive adhesive, a plasticizer, or a combination thereof as a main component is preferably used.

Examples of styrene-based polymers include styrene-ethylene-butylene-styrene block copolymers, styrene-butylene-styrene block copolymers, styrene-isobutylene-styrene copolymers, and styrene-butadiene-styrene block copolymers. , One or more of these can be used. Among these, a styrene-butadiene-styrene block copolymer is preferable because it has good thermal stability. Further, as the tackifier and the plasticizer, those solid at room temperature can be used. Examples of the tackifier include C5 petroleum resin, C9 petroleum resin, dicyclopentadiene petroleum resin, rosin petroleum resin, polyterpene resin, terpene phenol resin and the like. Examples of the plasticizer include monomer plasticizers such as triflesyl phosphate, dibutyl phthalate, and dioctyl phthalate, as well as polymer plasticizers such as vinyl polymers and polyesters.

As the material of the slip prevention material 9 formed as the non-adhesive layer (non-adhesive portion), a material based on natural rubber, styrene-butadiene rubber, silicone rubber, chloroprene rubber, butyl rubber, styrene-isoprene rubber, etc. Can be used alone or in combination. Of these, silicone rubber or hydrogenated elastomers of SIS and SBS are preferable.

The method of providing the slip prevention material 9 on the back surface sheet 2 is not particularly limited, and examples thereof include melt coating using a hot melt coater.

Further, as the non-adhesive slip-preventing material 9, a hook material of a mechanical fastener can also be used. The shape of the hook is not particularly limited as long as it is locked to the underwear, and various known shapes such as a hook shape and a mushroom shape can be used.

In the examples of FIGS. 1 and 2A, the anti-slip material 9 is formed as one region including the central portion of the longitudinal direction D1 and the width direction D2 in a region other than the edge portion in the longitudinal direction D1 and the width direction D2. There is. However, the arrangement of the anti-slip material 9 is not limited to the one shown in the drawing, and the arrangement area of the anti-slip material 9 is divided as described later (FIGS. 5A and 5B) according to the structure of the absorbent article, the purpose of use, and the like. It may have been. Further, the slip prevention material 9 may also be provided at the edge portion in the longitudinal direction D1 and / or the width direction D2.

As shown in FIG. 2A, the absorbent article 1A according to the present embodiment further includes a release sheet 30A overlaid on the slip prevention material 9. The release sheet 30A partially covers the anti-slip material 9 and can be peeled off and removed by the action of the user at the time of use. In the illustrated form, openings 32 and 32 are formed in the release sheet 30A, and the slip prevention material 9 is partially exposed through the openings 32 and 32. Then, by peeling off the release sheet 30A, the slip prevention property on the back surface sheet 2 side can be changed.

Here, the above-mentioned "anti-slip property" refers to the ability to suppress the displacement of the absorbent article with respect to the underwear when it is attached to the underwear when the absorbent article is used. The "anti-slip property" on the back sheet side can be changed by changing the exposed area of the anti-slip material, or by changing the material of the anti-slip material to be exposed to prevent the displacement per unit area. It can be changed by changing the gender. "Anti-slip property" can refer to, for example, adhesiveness when the anti-slip material is composed of an adhesive portion. The adhesiveness of the back sheet side of the absorbent article is determined by the size of the area of the adhesive material and the adhesive force per unit area of the adhesive portion.

Hereinafter, the configuration and usage examples of the absorbent article according to this embodiment will be described in more detail with reference to FIGS. 2A, 2B, and 3 (a) to 3 (c). FIG. 2B is a diagram showing a state in which the release sheet 30A of the absorbent article 1A according to the present embodiment is peeled off, and FIGS. 3 (a) to 3 (c) are sectional views taken along line II of FIG. 2A. It is a figure which shows the process of peeling the release sheet 30A of the absorbent article 1A in order.

As described above, in the state where the release sheet 30A shown in FIGS. 2A and 3A is provided (referred to as the first state), a part of the slip prevention material 9 is exposed. In this first state, of the entire slip prevention material 9, only the portion exposed from the openings 32 and 32 exerts the slip prevention function, and the portion covered by the release sheet 30A does not function as the slip prevention material. Therefore, in this first state, a part of the slip-preventing material 9 contained in the absorbent article 1A is used, but not all of the slip-preventing material 9, so that the slip-preventing property is relatively small. By using the back sheet 2 side of the absorbent article 1A attached to the underwear in the first state (FIGS. 2A and 3 (a)), the user has an excessively large anti-slip property on the back sheet 2 side. It can be prevented from becoming.

2B and 3B are diagrams showing a state in which the release sheet 30A is being peeled off. Further, FIG. 3C is a diagram showing a state after the release sheet 30A has been peeled off. As shown in FIG. 3C, after the release sheet 30A is peeled off, the portion of the slip stopper 9 that was not exposed in the first state can be exposed. Therefore, in the state where the release sheet 30A is peeled off (referred to as the second state), the exposed area of the slip prevention material 9 can be increased from the first state. That is, this second state has a greater anti-displacement property than the first state. The user can improve the anti-slip property of the back sheet 2 side by attaching the back sheet 2 side of the absorbent article 1A to the underwear in the second state (FIG. 3 (c)).

As described above, according to the present embodiment, by the simple operation of peeling off the release sheet 30A, the user can perform the first method according to the type of underwear (the type of material of the part of the underwear to which the absorbent article is attached). It is possible to easily create a desired anti-slip property on the back surface sheet 2 side by selecting either a state or a second state.

In general, special underwear called sanitary shorts has a special material such as a liquid-proof sheet placed at least on the crotch part, while ordinary underwear is knitted on the crotch part as well as other parts. And fabrics such as woven fabrics are used. As described above, since the material of the surface on which the absorbent article is mounted differs depending on the underwear used, the conventional anti-slip material for the absorbent article may not be suitable for some underwear. For example, when the anti-slip material is composed of an adhesive portion, the adhesive force of the anti-slip material to the underwear tends to be excessively large depending on the composition of the fabric and the fiber material in ordinary underwear. Therefore, it may be difficult to peel off the absorbent article after use. In addition, a phenomenon (glue residue) may occur in which a part of the slip prevention material remains on the surface of the material of the underwear after being used for a long time. However, when the anti-slip material is configured to be compatible with ordinary underwear, sufficient adhesive strength may not be obtained for the special underwear.

On the other hand, according to this embodiment, it is possible to provide an absorbent article that can be adapted to both special underwear and ordinary underwear. For example, when using ordinary underwear, the user does not peel off the release preventing material 30A, but a part of the slip prevention material 9 is covered with the release sheet 30A, and the exposed slip prevention material 9 is small. The absorbent article 1A can be used in one state (FIGS. 2A and 3A). As a result, if the slip prevention material 9 is composed of an adhesive portion, the back sheet 2 side of the absorbent article 1A has a relatively weak adhesive force optimized for ordinary underwear, and thus is used. It is possible to avoid the above-mentioned inconvenience such as difficulty in peeling off the absorbent article later. On the other hand, when using special underwear in which a special material is arranged in the crotch portion or the like, the user simply peels off the release sheet 30A, and the exposed area of the slip prevention material 9 is increased in the second state (FIG. 3 (c)). )), And the absorbent article 1A can be used in this state. As a result, the back sheet 2 side of the absorbent article 1A has a relatively strong adhesive force optimized for the special underwear, so that the absorbent article 1A can be satisfactorily attached to and detached from the special underwear. Can be done.

In addition, depending on the fiber material used for ordinary underwear fabric, the fiber may easily come off from the cloth and remain on the surface of the slip prevention material. In such underwear, once the user removes the absorbent article from the underwear in order to correct the mounting position of the absorbent article, if the anti-slip material consists of an adhesive part, fibers adhere to the anti-slip material. The adhesive strength of the anti-slip material may decrease. Therefore, even if the absorbent article is reattached, the slip prevention property of the slip prevention material may be significantly reduced. In such a case, if the absorbent article 1A was initially used with respect to normal underwear in the first state (FIGS. 2A and 3A) in which the release sheet 30A was not peeled off, it was reattached. At this time, the release sheet 30A is peeled off to bring it into the second state (FIGS. 2B and 3 (b) and (c)), so that the clean anti-slip material 9 is exposed and the adhesive force on the back sheet 2 side is increased. The absorbent article 1A can be used in the raised state.

The material of the release sheet 30A can maintain the integralness with the slip prevention material even when the absorbent article is used in the first state (FIGS. 2A and 3A), and the material of the release sheet 30A can maintain the integrity with the slip prevention material and the second state (FIGS. 2B and 3A). The present invention is not particularly limited as long as it can be easily peeled off from the slip stopper 9 by a normal human force in order to obtain FIGS. 3 (b) and 3 (c). When the slip prevention material 9 is an adhesive portion, the release sheet 30 can be assumed to have been subjected to a mold release treatment on the side facing the slip prevention material 9. The mold release treatment is performed by, for example, applying a mold release treatment liquid such as a silicone-based resin, a fluororesin, or a tetrafluoroethylene-based resin to a paper or plastic base sheet by coating or spraying. Can be done.

Further, when the slip prevention material 9 is a non-adhesive portion, the slip prevention material 9 and the release sheet 30A are integrated in the use of the absorbent article in the first state (FIGS. 2A and 3A). It is preferable to dispose an adhesive material on the release sheet 30A in the region where the slip prevention material 9 and the release sheet 30A are in contact with each other so that the release prevention material 9 can be maintained. In that case, the adhesiveness between the slip prevention material 9 and the release sheet 30A due to the adhesive material is set so that the release sheet 30A can be easily peeled off by a normal human force.

In the illustrated form, the release sheet 30A is formed with two elongated openings 32, 32 extending along the longitudinal direction D1. As a result, in the first state in which the release sheet 30A is not peeled off, the displacement prevention material 9 continuously extending in the longitudinal direction D1 is exposed, and the displacement prevention function can be exhibited. Therefore, in the first state where the release sheet 30A is not peeled off, the absorbent article 1A can be fixed to the underwear along the longitudinal direction D1. However, the shape and number of openings are not limited to those shown in the drawings as long as the anti-slip material is partially covered and partially exposed.

In the modes shown in FIGS. 2A and 2B, the width of the opening 32 is preferably 2 to 20 mm, more preferably 5 to 16 mm.

FIG. 4 shows a modified example of the first embodiment. Also in the example shown in FIG. 4, a plurality of openings 32, 32, ... Are formed in the release sheet 30A. This example is different from the form shown in FIG. 2A and the like in that the shape and number of openings are different. The openings 32, 32, ... In this example have the same width as the openings 32, 32 shown in FIG. 2A, but are not continuous in the longitudinal direction D1 and are intermittent. As a result, in the first state in which the release sheet 30A is not peeled off, a more uniform anti-slip property (adhesive force) can be obtained over the back surface sheet 2.

In the case of the release sheet 30A in which a plurality of openings are formed in each of the longitudinal direction D1 and the width direction D2 as in this example shown in FIG. 4, the shape of the openings is a polygon other than a circle, an ellipse, or a quadrangle. And so on.

Further, when the opening has an elongated shape such as a rectangle as in the example shown in FIG. 2A, the elongated opening may be formed at a predetermined angle from the longitudinal direction D1.

In addition, in this specification, an opening means a region which does not have a release sheet and is surrounded by a continuous edge. Instead of such an opening, the release sheet 30A may be formed with a notch (a region formed by removing the region including the edge portion). Even when the notch is provided, the same effect as described above can be obtained by partially exposing the slip prevention material.

The ratio of the total area of the area where the opening and / or the notch is formed to the total area of the release sheet 30A depends on the use of the absorbent article, the characteristics of the slip prevention material 9, and the like, but is 20 to 20. It can be 80%, preferably 40-60%.

The release sheet 30A can also be configured as a plurality of divided sheets. However, as shown in the illustrated form, it is preferably a continuous sheet. As a result, when the user desires to use the absorbent article in the above-mentioned second state (the state in which the release sheet 30A is peeled off), the release sheet 30A can be peeled off in one step, and the first state. It is possible to reduce the time and effort required for the transition from the second state to the second state.

The slip-preventing material 9 described above is formed as one slip-preventing material 9 over the central region excluding the peripheral portion of the absorbent article 1A. However, the arrangement of the anti-slip material 9 is not limited to that shown in the drawing. For example, as shown in FIG. 5A, there are a plurality of elongated anti-slip materials extending linearly in the longitudinal direction D1 (five in the illustrated example). ) May be arranged. When the anti-slip material 9 is made of a plurality of elongated anti-slip materials, the number thereof may be about 2 to 7. Further, the elongated shape anti-displacement material does not necessarily have to extend linearly, and may be curved and extend so as to draw a waveform, for example. Further, the slip prevention material does not have to be continuous along the longitudinal direction D1, and may be provided discontinuously in the longitudinal direction D1.

When the slip-preventing material 9 includes a plurality of slip-preventing material portions, the slip-preventing material 9 may have a first portion 9a having a relatively weak slip-preventing property and a second portion 9b having a relatively strong slip-preventing property. In the illustrated example, these first portions 9a and second portions 9b are arranged alternately in the width direction D2. Such a plurality of portions having different anti-slip properties can be formed by using different anti-slip material for each portion.

The configuration and function of the form in which the absorbent article 1A of FIG. 5A further includes the release sheet 30A will be described with reference to FIGS. 5B and 6. FIG. 5B is a plan view of the absorbent article 1A as viewed from the back sheet 2 side. Further, FIG. 6 is a cross-sectional view taken along line II-II of FIG. 5B, which is a diagram showing steps in which the release sheet 30A is peeled off in order.

The release sheet 30A has the same structure as that described above with reference to FIG. 2A and the like, and elongated openings 32 and 32 extending in the longitudinal direction D1 are formed. In this example, the first portions 9a and 9a of the above-mentioned slip prevention material 9 are exposed from the openings 32 and 32 of the release sheet 30A, respectively, and the second portions 9b, 9b and 9b are covered with the release sheet 30A. ing. As a result, it is possible to create a first state in which the anti-slip property is relatively weak (FIGS. 5B and 6A). Then, when it is desired to further change the slip prevention property on the back sheet 2 side according to the type of underwear from the first state, the user can peel off the release sheet 30A (FIG. 6 (b)). As a result, it is possible to create a second state in which the slip prevention property is enhanced (FIG. 6 (c)).

In this example, the slip prevention property of the first portion 9a and the slip prevention property of the second portion 9b of the slip prevention material 9 are different, and the ratio of the exposed area changes by peeling the release sheet 30A. More specifically, in the first state in which the release sheet 30A is not peeled off, the area ratio of the first portion 9a is 100%, and the area ratio of the second portion 9b is 0%. On the other hand, in the second state after the release sheet 30A is peeled off, in this example, assuming that the first portion 9a and the second portion 9b have the same planar shape and size, the area ratio of the first portion 9a is 40%. The area ratio of the two parts 9b is 60%.

In this example, the anti-displacement property of the first portion 9a of the anti-slip material 9 exposed in the first state where the release sheet 30A is not peeled off is the second portion 9b exposed in the second state after the release sheet 30A is peeled off. Is smaller than Therefore, in the first state, by increasing the exposed area ratio of the first portion 9a, which has a relatively weak anti-displacement property, a weaker anti-displacement property can be obtained, while in the second state, the second portion 9b is exposed. By increasing the area ratio, stronger anti-slip properties can be obtained. As described above, since the anti-slip material 9 has at least two portions having different anti-slip properties, the back surface sheet 2 side in the first state is compared with the case where the plurality of anti-slip materials have the same anti-slip properties. The difference between the anti-slip property and the anti-slip property from the second state can be made more remarkable.

For example, when the anti-slip material is composed of an adhesive portion, the first portion 9a has a more suitable adhesiveness to ordinary underwear, and the second portion 9b has a more suitable adhesiveness to special underwear. Can be configured in. Then, as described above, the ratio of the exposed area of the first portion 9a is large in the first state before the release sheet 30A is peeled off, and the exposed area of the second portion 9b in the second state after the release sheet 30A is peeled off. By increasing the ratio, optimized adhesiveness can be formed on the back sheet 2 side depending on whether normal underwear or special underwear is used.

When the absorbent article 1A according to the present embodiment is wrapped with a packaging sheet to form a package absorbent article, the back surface sheet 2 side is in the state shown in FIG. 2A, that is, in the state where the slip prevention material 9 is partially exposed. The absorbent article 1A and the packaging sheet can be placed facing each other on the packaging sheet, and can be folded in three or four so that the surface sheet 3 side is on the inside, for example. In that case, since the exposed anti-slip material 9 comes into contact with the packaging sheet, it is preferable that the inner surface of the packaging sheet (the surface facing the absorbent article 1A) is subjected to a shape removal treatment. The release process can be the same as that applied to the above-mentioned release sheet. Further, the absorbent article 1A can be wrapped by the packaging sheet after arranging another sheet that covers the portion of the anti-slip material 9 exposed through the opening of the release sheet 30A on the release sheet 30A.

<Second Embodiment>
FIG. 7 shows a plan view of the absorbent article 1B according to the second embodiment of the present invention as viewed from the back surface sheet 2 side. Further, FIG. 8 shows a sectional view taken along line III-III of FIG. FIG. 8 is a diagram showing an example of use of the absorbent article 1B according to this embodiment.

This embodiment differs from the first embodiment in that a release sheet 30B is provided in place of the release sheet 30A used in the first embodiment (FIG. 2A, etc.). The basic configuration and operation other than the release sheet 30B of the second embodiment are the same as those of the first embodiment.

As shown in FIGS. 7 and 8 (a), the release sheet 30B according to this example is different from the release sheet 30A (FIG. 2A and the like) in the first embodiment, and has a continuous slip stopper 9 having no opening. It is a covering sheet. In the release sheet 30B, the regions corresponding to the openings 32, 32 of the release sheet 30A in the first embodiment are the detachable portions 35, 35. The detachable portions 35 and 35 can be, for example, portions surrounded by perforations 36 and 36, respectively, as shown in FIG. 7.

When the user uses the absorbent article 1B, the detachable portions 35 and 35 can be removed from the release sheet 30B by separating the perforations 36 and 36 (FIG. 8 (b)). As a result, an opening is formed in the release sheet 30B, and the slip prevention material 9 can be partially exposed. The openings 32a and 32a (FIG. 8 (c)) formed in the release sheet 30B after the detachable portion is removed are the same as the openings 32 and 32 (FIG. 2A and the like) of the release sheet 30A in the first embodiment. Can function. That is, the anti-slip material 9 exposed from the openings 32a and 32a formed in the release sheet 30B functions, and the portion still covered by the release sheet 30B does not function as the anti-slip material, so that the anti-slip property is relatively small. The first state can be created. In this first state (FIG. 8 (c)), the user attaches the back sheet 2 side of the absorbent article 1B to the underwear and uses it, so that the slip prevention property of the back sheet 2 side becomes excessively large. Can be prevented.

Further, by further peeling the release sheet 30B from the first state (FIGS. 7 and 8 (c)) (FIG. 8 (d)), the exposed area of the slip prevention material 9 is increased (FIG. 8 (FIG. 8). e)) can be created. By attaching the back sheet 2 side of the absorbent article 1B to the underwear and using it in such a second state, it is possible to improve the slip prevention property of the back sheet 2 side.

In the case of the present embodiment, when the user desires high anti-slip properties from the beginning, the release sheet 30B is peeled off without removing the detachable portions 35 and 35 to form the second state. Can also be created.

In the illustrated form, the detachable portions 35, 35 are formed as a portion surrounded by the perforations 36, 36, but the forming method is not limited as long as it is a portion surrounded by the cleaving line. .. For example, instead of the perforation, a linear portion having a reduced thickness to facilitate stress concentration can be formed to make it a detachable portion.

Further, when the user removes the detachable portions 35 and 35 by hand, tabs and the like are formed on the back surfaces of the detachable portions 35 and 35 so that the user can easily grasp them. You may leave it.

The shapes and numbers of the detachable portions 35, 35 are the same as the openings 32, 32 of the release sheet 30A described in the first embodiment.

Next, a modified example of the second embodiment will be described with reference to FIGS. 9A, 9B, and 10. FIG. 9A shows a state in which the packaging sheet (outer sheet) 10 is further stacked on the back sheet 2 side of the absorbent article 1. 9B is a diagram showing a state in which the packaging sheet 10 of the absorbent article 1 according to this example is peeled off, and FIGS. 10A to 10B are sectional views taken along line IV-IV of FIG. 9A. It is a figure which shows the process in which the packaging sheet 10 and the release sheet 30B are peeled off in order.

The structure of the release sheet 30B of this example is the same as that of the release sheet 30B described with reference to FIGS. 5 and 6, but in this example, the detachable portions 35 and 35 are adhered to the packaging sheet 10. In that respect (FIGS. 9B and 10 (a)), it differs from the above configuration. Therefore, the detachable portions 35, 35 are removed from the release sheet 30B when the packaging sheet 10 is peeled off (FIGS. 9B and 10 (b)). As a result, after the packaging sheet 10 is peeled off, openings 32a and 32a corresponding to the detachable portions are formed in the peelable sheet 30B. As described above, in this example, the work of manually removing the detachable portions 35 and 35 by the user becomes unnecessary, and the packaging sheet 10 is detached from the release sheet 30B by a simple operation of peeling the packaging sheet 10 from the absorbent article 1B. Possible portions 35, 35 can be removed. As a result, it is possible to create the above-mentioned first state (FIG. 10 (c)) in which the release preventive sheet 30B partially covers and partially exposes the slip prevention material 9 and has a relatively weak slip prevention property. That is, the first state can be created when the absorbent article packaged by the packaging sheet is opened.

Further, the release sheet 30B can be peeled off depending on the underwear used (FIG. 10 (d)). Then, after the release sheet 30B is peeled off, a second state (FIG. 10 (e)) in which the slip prevention material 9 is exposed more and the slip prevention property is high can be obtained.

As the packaging sheet 10, a polyolefin-based film such as polypropylene or polyethylene, a film such as polyester or polyvinyl alcohol, a non-woven fabric, a laminated non-woven fabric (including a polylami non-woven fabric), paper or the like can be used. A film is preferable if the design by printing is important, and a non-woven fabric or the like is preferable if the texture and softness are important.

FIG. 11 shows a modified example of the absorbent article 1B according to the second embodiment. The example shown in FIG. 11 differs from the absorbent article described with reference to FIGS. 5 to 10 described above in that the configurations of the slip prevention material and the release sheet are different. In this example, the slip stopper 9 is composed of five slip stopper portions 91, 92, 93, 94, 95, and the release sheet 30B'has five removable portions 351, 352, 353, 354, It has 355. The detachable portions 351 and 352, 353, 354, and 355 are formed so as to cover the plurality of anti-slip material portions 91, 92, 93, 94, and 95, respectively. That is, by removing the detachable portions 351, 352, 353, 354, and 355, the displacement prevention material portions 91, 92, 93, 94, and 95 are exposed, respectively.

When using the absorbent article 1B of this example, the user can remove at least one or more of the detachable portions 351, 352, 353, 354, 355, depending on the underwear used. For example, the user can attach the absorbent article 1B to the underwear by removing only the detachable portion 353 in the center of the width direction D2 and exposing only the slip prevention material portion 93. At that time, if the user feels that the back sheet 2 side has low anti-slip property, the absorbent article 1B is once removed from the underwear, and the detachable parts 351 and 355 are removed to prevent the anti-slip material. In addition to 93, the anti-slip material portions 91 and 95 can be exposed and the absorbent article 1B can be reattached. Alternatively, the user can use the same underwear next time by removing the detachable portions 351, 353, and 355 to expose the slip prevention material portions 91, 93, and 95. As a result, the absorbent article 1B can be used in a state where the slip prevention property is enhanced.

It should be noted that removing the detachable portions 351, 353, and 355 as described above is merely an example, and the user can use any portion of the plurality of detachable portions according to the desired anti-slip property. Can be removed. For example, when it is desired to improve the anti-slip property near the center of D2 in the width direction, the detachable portions 352 and 354 are removed in addition to the detachable portion 351 and the anti-displacement material portion is added to the anti-displacement material portion 93. 92 and 94 can be exposed.

Further, when the detachable portion is formed independently in the vicinity of the center and the vicinity of both ends in the longitudinal direction D1, the detachable portion of the region where the slip prevention property is desired to be improved can be removed. It is possible to obtain the desired anti-slip property of the user according to the type of underwear.

In this way, the user can change the exposed area of the slip prevention material 9 a plurality of times depending on the underwear used, and can adjust the slip prevention property on the back sheet 2 side by himself / herself. ..

Further, also in this example, as shown in FIG. 5A and the like, the slip prevention material may be composed of a plurality of slip prevention material portions having different slip prevention properties (for example, adhesive force per unit area). Then, by selecting the detachable portion to be removed by the user, it is possible to create a state in which not only the exposed area of the slip-preventing material 9 but also the slip-preventing property (adhesive strength, etc.) per unit area is different.

As described above, even when the absorbent article 1B according to this example is used, the user can select whether or not to peel off the release sheet 30B according to the underwear, and obtain the desired optimized anti-slip property. ..

The individual features described above can be implemented in any combination. For example, a detachable portion described in the second embodiment may be additionally formed on a part of the release sheet 30A in the first embodiment. As a result, the user who feels that the anti-displacement material 9 exposed by the opening 32 of the release sheet 30A is not sufficient in the anti-displacement property can additionally remove the detachable portion and desire on the back surface sheet 2 side. It is possible to obtain anti-slip properties.

Further, the embodiment of the present invention can be a packaging absorbent article including any of the above-mentioned absorbent articles and a packaging sheet in which the absorbent articles are packaged.

Further, in the above description, a sanitary napkin is taken as an example, but this embodiment may be used not only for a sanitary napkin but also for a pantyliner, a water absorbing pad for incontinence, a pad type diaper, and the like. Can be done.

1 Absorbent article 2 Back sheet 3 Front sheet 4 Absorbent 5 Encapsulating sheet 7 Side non-woven fabric 9, 9a, 9b, 91-95 Anti-slip material 10 Packaging sheet 15 Pouch tape 30A, 30A', 30B Peeling sheet 32 Opening 32a Opening (Opening formed by removing the detachable part)
35, 3513-555 Removable part

Claims (6)

An absorbent article having a front surface sheet arranged on the skin side at the time of wearing, a back surface sheet arranged on the underwear side, and an absorber provided between the front surface sheet and the back surface sheet.
The back surface sheet side is provided with a slip stopper for suppressing slippage with respect to the underwear, and a release sheet having an opening and / or a notch for partially exposing the slip stopper.
An absorbent article whose anti-slip property on the back surface sheet side can be changed by peeling off the release sheet. An absorbent article having a front surface sheet arranged on the skin side at the time of wearing, a back surface sheet arranged on the underwear side, and an absorber provided between the front surface sheet and the back surface sheet.
The back surface sheet side is provided with a slip-preventing material for suppressing slippage with respect to the underwear when mounted, and a peeling sheet that covers the slip-preventing material and has a removable portion.
An absorbent article capable of partially exposing the slip prevention material by removing the detachable portion and changing the slip prevention property on the back surface sheet side by peeling the release sheet. The absorbent article according to claim 2, further comprising a detachable portion and an outer sheet adhered to cover the release sheet. The absorbent article according to any one of claims 1 to 3, wherein the release sheet is a continuous sheet. The slip prevention material has at least a first portion and a second portion having a slip prevention property different from that of the first portion, and by peeling off the release sheet, the exposed area of the first portion and the second portion are obtained. The absorbent article according to any one of claims 1 to 4, wherein the ratio of the portion to the exposed area can be changed. It has the absorbent article according to claim 3 and a packaging sheet for packaging the absorbent article.
The packaging sheet is a packaging absorbent article which is the outer sheet.

Images