TW202034873A - Absorbent article - Google Patents

Abstract

To make it less likely to cause friction between a sanitary napkin worn on a user and the user's skin. Provided is a sanitary napkin 1 having a slippage-prevention pressure-sensitive adhesive layer 11 provided on a non-skin-side surface of a napkin-body part in which an absorber 4 is interposed between a skin-side front surface sheet 3 and a non-skin-side rear surface sheet 2, to thereby facilitate anchoring with respect to the outer wear. A shear deformation layer 10 is provided between the absorber 4 and the slippage-prevention pressure-sensitive adhesive layer 11 so that shear deformation taking place in the shear deformation layer 10 causes a member disposed on the skin side of the shear deformation layer 10 and a member disposed on the non-skin side of the shear deformation layer 10 to be able to be displaced relatively to each other in the planar direction. Said shear deformation layer is composed of a foamed resin. The shear deformation layer 10 is disposed either on the non-skin-side surface of the rear surface sheet 2 or between the absorber 4 and the rear surface sheet 2.

Description

Absorbent articles

The present invention relates to absorbent articles such as sanitary napkins, protective pads, disposable diapers, incontinence pads, etc., and in detail relates to an absorbent article that has a shear deformation layer that makes the absorbent article and the wearer's skin Absorbent articles that are not prone to friction.

Historically, it has been pointed out that when wearing absorbent articles, the wearer’s actions that change the posture due to foot movement, etc., cause friction between the skin contact surface of the absorbent article and the wearer’s skin, causing the wearer Feeling itching or pain, worsening of pretense.

The reason for the friction between the absorbent article and the wearer’s skin can be cited when the absorbent article is worn, because the absorbent article is fixed outside the underwear or diaper by the anti-displacement member provided on the non-skin side The outer part of the body and the like, therefore, the movement of the wearer produces distortions or wrinkles, which cause the outer part to displace relative to the wearer's skin, which may cause the absorbent article to displace along with the outer part, as a cause.

A technique for improving adhesion to the skin to prevent external leakage during use. The following Patent Document 1 discloses an absorbent article provided with a compressed recovery sheet. The compression recovery sheet is thin in the package body of the absorbent article. The thickness recovers when taken out of the package, and the absorbent article exhibits the required thickness when used. In addition, the following Patent Document 2 discloses a suction An absorbent article, by further laminating soft polyurethane foam with a high coefficient of friction as a non-slip material on the outer side of the backing material to prevent the user from shifting between the absorbent article and the underwear even if the user moves slightly during wearing The situation.

【Prior Technical Literature】

【Patent Literature】

[Patent Document 1] Japanese Patent No. 3611745

[Patent Document 2] Japanese Patent Application Laid-Open No. 11-347066

It is also thought that, as mentioned above, because the friction between the absorbent article and the wearer’s skin is mainly due to the relative displacement between the outside and the wearer’s skin, so long as the absorbent article is fixed on the outer side, it will inevitably cause a certain amount of friction. Because of the high degree of friction, so far, measures have been taken to improve the skin touch of the surface sheet. In addition, although it has been implemented as described in the above-mentioned Patent Document 1 to increase the adhesion to the skin by expressing a thickness on the skin side, and as described in the above-mentioned Patent Document 2, the absorbent article is not easily displaced with respect to the outside. However, no direct measures have been taken to prevent friction between the absorbent article and the wearer's skin.

In view of this, the main subject of the present invention is to provide an absorbent article that prevents friction between the absorbent article and the wearer's skin during wearing.

In order to solve the above-mentioned problems, the present invention of Item 1 provides an absorbent article which is provided between the surface sheet on the skin side and the back sheet on the non-skin side. It is an absorbent article with anti-displacement parts fixed to the outside.

It is characterized in that a shear deformation layer is provided between the absorbent body and the anti-displacement member, and the shear deformation layer is formed into a member arranged on the skin side of the shear deformation layer and arranged in The member on the non-skin side of the shear deformed layer can be relatively displaced with respect to the surface direction.

In the invention described in the above item 1, a shear deformation layer is provided between the absorbent body and the anti-displacement member on the non-skin side of the absorbent article, and the shear deformation layer is formed into a configuration The member on the skin side of the shear deformed layer and the member on the non-skin side of the shear deformed layer can be relatively displaced with respect to the surface direction. Therefore, even when the absorbent article is worn, the posture is caused by foot movement. When the change of the wearer’s movement produces twists or wrinkles, etc., when the external displacement relative to the wearer’s skin is caused, the shear deformation of the aforementioned shear deformation layer can also be used to dispose on the aforementioned shear deformation layer. When the displacement of the non-skin-side member (including at least the anti-displacement member) does not affect the skin-side member (including at least the surface sheet) arranged in the shear deformation layer, it is maintained in the cut The skin side of the deformed layer is in a state where the material is closely adhered to the wearer's skin. In this way, due to the shear deformation of the aforementioned shear deformation layer, the external displacement will not affect the members arranged on the skin side of the shear deformation layer. Therefore, the skin contact surface of the absorbent article and the wearer's skin during wearing The friction between them becomes less likely to occur, thereby suppressing deterioration of wearer's wearer's sense of wear such as itching or pain.

The present invention of Item 2 provides the absorbent article described in Item 1, which Here, the aforementioned shear deformation layer is made of foamed resin.

In the invention described in item 2 above, the shear deformation layer is a foamed resin obtained by foaming synthetic resins such as polypropylene, polyethylene, styrene, etc. into a porous state that can obtain a large shear strain (Plastic foam).

The present invention of item 3 provides the absorbent article according to item 1 or 2, wherein the shear deformation layer is provided on the non-skin side of the back sheet, and the displacement preventing member is provided on the shear deformation The non-skin side of the layer.

The invention described in item 3 above relates to an example of an embodiment of the arrangement position of the shear deformation layer, in which the shear deformation layer is provided on the non-skin side of the back sheet and the displacement preventing member is provided The non-skin side of the aforementioned shear deformed layer. That is, the surface sheet, the absorber, and the back sheet are arranged on the skin side of the shear-deformed layer, and it is possible to maintain a state where these parts are integrally adhered to the skin.

The present invention of item 4 provides the absorbent article according to item 1 or 2, wherein the shear deformation layer is provided between the absorbent body and the back sheet, and the displacement preventing member is provided on the back sheet The non-skin side of the material.

The invention described in item 4 above relates to another embodiment example of the arrangement position of the shear deformation layer. The shear deformation layer is provided between the absorber and the back sheet and the displacement preventing member is provided. On the non-skin side of the aforementioned back sheet. That is, the surface sheet and the absorber are arranged on the skin side of the shear-deformed layer, and it is possible to maintain the state where these parts are integrally adhered to the skin.

The present invention of item 5 provides the absorbent article as described in any one of items 1 to 4, wherein the anti-displacement member is provided so as to be heavy in the thickness direction of the shear deformation layer. Stacked area.

In the invention described in the above item 5, since the displacement preventing member is provided in an area overlapping the shear deformation layer in the thickness direction, it is possible to maintain the non-skin side of the shear deformation layer to be fixed to the outside and be arranged in the shear The skin side of the cut deformed layer is in a state where the material is closely adhered to the wearer's skin.

The present invention of item 6 provides the absorbent article according to any one of items 1 to 5, wherein the anti-displacement member is composed of an adhesive layer or a hook member.

In the invention described in the above item 6, the displacement preventing member is an adhesive layer or a hook member. When the wearer other than the absorbent article is underwear such as underwear, the aforementioned anti-displacement member should preferably use an adhesive layer; when it is the outer body of a diaper, it is ideal to use one that can be mechanically joined to the inner surface of the outer body of the diaper. Hook material.

As explained in detail above, according to the present invention, friction between the absorbent article and the wearer's skin becomes less likely to occur during wearing.

1: Sanitary napkin for physiological use

2: Back sheet

3: Surface sheet

4: Absorber

5: Wrapping sheet

6: The second sheet

7: Side sheet

10: Shear deformation layer

11: Anti-shift adhesive layer

[Figure 1] is a partially broken development view of the sanitary napkin 1 of the present invention.

[Figure 2] is the II-II line arrow view of Figure 1.

[Figure 3] A cross-sectional view of the sanitary napkin 1 showing the deformed state when the wearer moves.

[Figure 4] Section of the sanitary napkin 1 with the shear deformation layer 10 of the second type example Figure.

[Figure 5] A cross-sectional view of a sanitary napkin 1 equipped with a shear deformation layer 10 of the third type example.

[FIG. 6] The back view of the sanitary napkin 1 provided with the shear deformation layer 10 of the fourth type example.

[Figure 7] is a view of the arrow VII-VII in Figure 6;

[FIG. 8] The back view of the sanitary napkin 1 provided with the shear deformation layer 10 of the fifth type example.

Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings.

[Basic composition of sanitary napkin 1]

The sanitary napkin 1 of the present invention, as shown in Fig. 1 and Fig. 2, is a liquid-impermeable back sheet made of polyethylene sheet, polypropylene sheet, etc. 2. It makes menstrual blood or secretions fast The permeable surface sheet 3, the absorbent body 4 composed of cotton-like pulp or synthetic pulp interposed between the two sheets 2, 3, etc., are used to maintain the shape of the absorbent body 4 and improve the diffusion A wrapping sheet 5 composed of crepe paper or non-woven fabric surrounded by the absorber 4, a hydrophilic second sheet 6 arranged between the surface sheet 3 and the absorber 4 as needed, and on the skin contact surface The two sides of the side are composed of side sheets 7 and 7 respectively arranged along the longitudinal direction. In addition, around the absorbent body 4, at the front and rear end edges in the longitudinal direction of the sanitary napkin, the outer edges of the back sheet 2 and the surface sheet 3 are sealed by hot-melt adhesive or heat-sealed, ultrasonic It is joined by sealing and other joining means, and at its both side edges, it extends more laterally than the side edges of the absorbent body 4 The back sheet 2 and the side sheet 7 are joined by an adhesive such as hot melt adhesive, or a joining means such as heat sealing, ultrasonic sealing, and the like, and an outer peripheral fin portion without the absorber 4 is formed on the outer periphery.

The structure of the aforementioned sanitary napkin 1 will be further described in detail below:

The aforementioned back sheet 2 is made of polyethylene, polypropylene, or other olefin-based resin sheet that has at least water resistance, but in addition, it can also be made of laminated non-woven fabric on a polyethylene sheet, etc. Laminated non-woven fabric, or a non-woven fabric sheet (in this case, the waterproof film and non-woven fabric constitute a liquid-impermeable back sheet), etc., on the premise that a waterproof film is interposed to substantially ensure liquid impermeability. In recent years, from the viewpoint of preventing sultry heat, it has tended to use those with moisture permeability. This water-blocking and moisture-permeable sheet is a microporous sheet obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretch it in one or two directions. material.

For the aforementioned surface sheet 3, a porous or non-porous non-woven fabric is suitable. The material fibers constituting the non-woven fabric can be, for example, polyethylene or polypropylene, such as olefin, polyester, polyamide, and other synthetic fibers, as well as recycled fibers such as rayon or cupra, and natural fibers such as cotton. , And can use non-woven fabrics obtained by appropriate processing methods such as water needle method, spun bonding method, hot melt bonding method, melt blown method, and needle rolling method. Among these processing methods, the advantage of the water jet method is that it is flexible, the advantage of the spunbond method is that it is rich in drape, and the advantage of the hot melt bonding method and the aeration method is that it is fluffy and has high compression recovery. The fibers of the non-woven fabric can be either long fibers or short fibers, but it is ideal to use short fibers to present a towel-like texture. In addition, in order to facilitate the embossing process, it is better to use olefin fibers such as polyethylene or polypropylene with a lower melting point. In addition, a core-sheath type fiber having a fiber with a high melting point as a core and a fiber with a low melting point as a sheath, or a composite fiber of a side-by-side type fiber and a split type fiber can also be suitably used.

The absorbent body 4 interposed between the back sheet 2 and the surface sheet 3 is, for example, pulp mixed with super absorbent resin, or pulp mixed with chemical fiber and mixed with super absorbent resin. As shown in the figure, the aforementioned absorbent body 4 is ideally surrounded by a wrapping sheet 5 made of crepe paper or non-woven fabric to maintain the shape and quickly diffuse menstrual blood, while preventing the absorbed menstrual blood from flowing back. The aforementioned pulp includes chemical pulp obtained from wood, cellulose fibers such as melted pulp, or artificial cellulose fibers such as rayon and acetate. Compared with hardwood pulp, it is more functional and cost-effective. In other words, it is more suitable to use conifer pulp with longer fiber length. In addition, the aforementioned absorber 4 may also be an airlaid absorber 4 that can be reduced in volume, or a polymer sheet formed by disposing a super absorbent resin between two non-woven fabric layers.

In addition, synthetic fibers may be mixed in the aforementioned absorber 4. For the aforementioned synthetic fibers, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate or polybutylene terephthalate, polyamides such as nylon, and These copolymers, etc. may also be a mixture of these two types. In addition, a core-sheath type fiber with a fiber with a high melting point as a core and a fiber with a low melting point as a sheath, or a composite fiber such as a side-by-side type fiber and a split type fiber can also be used. In order to make the aforementioned synthetic fibers have affinity for body fluids, in the case of hydrophobic fibers, it is desirable to use those that have been surface-treated with a hydrophilizing agent.

The wrapping sheet 5 surrounding the aforementioned absorbent body 4 may be crepe paper or non-woven fabric such as tissue paper or tissue. The fiber material constituting the aforementioned crepe paper is ideally composed of 100% pulp fibers, and is ideally used for tissue paper or tissue pulp of conifer and hardwood. The aforementioned non-woven fabrics are suitable for spunbond nonwovens or spunbond/meltblown/spunbond (SMS, SSMMS, etc.) nonwovens (SMS, SSMMS, etc.), and the material can be polypropylene, polyethylene/polypropylene composites Wait. As in this example, in the case where the wrapping sheet 5 surrounding the absorbent body 4 is provided, the result is There is a wrapping sheet 5 interposed between the surface sheet 3 and the absorber 4. The wrapping sheet 5 having excellent absorbability can quickly diffuse body fluids and prevent such backflow of menstrual blood.

The aforementioned second sheet 6 may be any one that is hydrophilic to body fluids. Specifically, it is possible to use natural fibers such as rayon, cuproammonium, and other regenerated fibers, cotton, etc., and use materials that have hydrophilic properties, or use olefin-based, polyester-based, or polyolefin-based materials such as polyethylene or polypropylene. Synthetic fibers such as amide-based fibers are surface-treated with a hydrophilizing agent to give hydrophilic fibers. In addition, in order to make the aforementioned second sheet 6 tough, it may have a porous film layer on the back side (absorber 4 side), or it may be a laminated sheet with a wrapping sheet, or a material containing pulp may be used.

On the other hand, on both sides of the skin contact surface side of the sanitary napkin 1 of the present sanitary napkin 1, side sheets 7 and 7 are respectively provided along the longitudinal direction and almost the entire length of the sanitary napkin 1. This side sheet 7 A part of, 7 extends to the side, and by a part of the back sheet 2 extending to the side in the same way, wing-shaped fins W, W protruding outward on both sides of the main body are formed. The aforementioned wing-shaped flaps W and W are used to fold the fold line RL (Figure 1) at the base end to the outside to wrap around the crotch part of the underwear to connect the back sheet of the wing-like flap W The anti-displacement adhesive layer (not shown) provided on the outer surface of the material 2 is attached to the outer surface of the underwear to prevent displacement from the underwear.

The aforementioned side sheet 7 may be a water-repellent treated non-woven fabric or a hydrophilic treated non-woven fabric from the standpoint of important functions. For example, if the function of preventing the penetration of menstrual blood or secretions, or improving the touch of the skin is important, it is desirable to use a water-repellent treated non-woven fabric coated with a silicon-based, paraffin-based, or alkyl chromium chloride-based water repellent. In addition, if attention is paid to the absorbency of the aforementioned wing-shaped fins W and W of menstrual blood, it is ideal to be used in the manufacturing process of synthetic fibers. Compounds, for example, a method of coexisting and polymerizing oxidation products of polyethylene glycol, or a method of treating with a metal salt such as tin tetrachloride to dissolve the surface part to become porous and precipitate a metal hydroxide, etc., It is a hydrophilic treated non-woven fabric made by swelling synthetic fibers or being porous, and applying capillary phenomenon to impart hydrophilicity.

The non-skin side of the main body part where the absorber 4 is interposed between the surface sheet 3 and the back sheet 2 is provided with an anti-displacement adhesive layer 11 for fixing to underwear (outside) as described in detail in the following paragraph.

〔Shear Deformation Layer〕

(Example of Type 1)

In the sanitary napkin 1 of the present invention, as shown in FIGS. 1 and 2, a shear deformation layer 10 is provided between the absorbent body 4 and the anti-displacement adhesive layer 11, and the shear deformation layer 10 is Shear deformation is formed so that the member arranged on the skin side of the shear deformed layer 10 and the member arranged on the non-skin side of the shear deformed layer 10 can be relatively displaced with respect to the surface direction.

In the embodiment shown in FIGS. 1 and 2, the shear deformation layer 10 is provided on the non-skin side of the back sheet 2, and the anti-displacement adhesive layer 11 is provided on the non-skin side of the shear deformation layer 10. Side of the skin. In this case, the parts arranged on the skin side of the aforementioned shear deformable layer 10 are the surface sheet 3, the second sheet 6, the absorber 4, and the wrapping sheet 5, and the back sheet 2 and the side sheet 7 is arranged on the part on the skin side than the aforementioned shear deformed layer 10; the member arranged on the non-skin side of the shear deformed layer 10 is the anti-displacement adhesive layer 11, underwear, and the outer side of the underwear when worn Fold back so as to wrap the back sheet 2 and the side sheet 7 of the wing-shaped flap W of the crotch portion of the underwear.

Therefore, as shown in Figure 3, even when the sanitary napkin 1 is worn, the underwear Distortion or wrinkles are caused by the movement of the wearer that changes the posture such as foot movement, so that the underwear is relatively displaced to the wearer’s skin. The shear deformation layer 10 can also be deformed by the shearing deformation layer 10 described above. When the displacement of the member on the non-skin side of the shear deformation layer 10 including the anti-displacement adhesive layer 11 and underwear does not affect the member on the skin side of the shear deformation layer 10, it is maintained at The skin-side member arranged on the shear deformed layer 10 is in a state where it is in close contact with the wearer's skin. That is, as shown in FIG. 3(A), when the underwear moves to the right side in accordance with the movement of the wearer, the skin side member arranged on the shear deformation layer 10 is due to the wearer's skin surface and physiological hygiene The frictional force of the surface of the cotton 1 tries to maintain the state of being in close contact with the skin surface, so that a predetermined shearing force acts on the shear-deformed layer 10. The shear deformed layer 10 is sheared and deformed by this shearing force, so that the skin-side member arranged in the shear deformed layer 10 maintains a state of being in close contact with the skin, and the underwear moves to the right side. On the other hand, as shown in FIG. 3(B), when the underwear moves to the left in accordance with the movement of the wearer, a specified shear force acts on the shear deformation layer 10, and the shear deformation layer 10 is cut Deformed so that the skin-side member arranged on the shear-deformed layer 10 maintains a state of being closely adhered to the skin, while the underwear moves to the left. In this way, since the shear deformed layer 10 is sheared and deformed, the skin-side members arranged on the shear deformed layer 10 are kept in close contact with the skin. Therefore, the skin contact surface and the wearer of the sanitary napkin 1 are worn when worn. The friction between the user's skin becomes less likely to occur, thereby suppressing the deterioration of the sense of wear such as itching or pain.

In the plan view shown in FIG. 1, the aforementioned shear deformation layer 10 is formed in a plane shape that is almost the same as or smaller than that of the absorber 4. In the example shown in FIG. 1, the aforementioned shear deformation layer 10 is formed in a flat plate shape that almost covers the entire surface of the absorbent body 4 and has a quadrangular shape in plan view. However, as explained in detail in the following paragraph, it can also be formed in the width direction. And/or formed by plural parts divided in the longitudinal direction. In addition, the area where the aforementioned shear deformation layer 10 The retractable body 4 is almost full, only corresponding to the long side section of the body fluid discharge part H of the wearer, that is, the long side section formed by the wing-shaped fins W on both sides, and is not set on the front side and the back side. It can be.

The aforementioned shear deformable layer 10 can be used without limitation as long as it is a member with a large shear strain. Examples include: porous foam made of polypropylene, polyethylene, styrene, etc. Resin (plastic foam); natural sponge made of sponge fibers such as sponge; thick non-woven fabric made of crimped fiber or non-crimped fiber. Among these, it is preferable to be composed of a foamed resin that has good compression restorability, has a certain degree of strength and durability as a structural member, and has a large amount of movement in the surface direction when a shearing force is applied. In order to prevent the stuffiness during wearing, the aforementioned foamed resin is ideally those using an open-cell structure with continuous and air-permeable bubbles inside.

The thickness of the aforementioned shear deformation layer 10 is arbitrary. Generally speaking, when the same shearing force acts, the thicker the thickness, the greater the relative displacement between the two sides. Ideally, when the specified shearing force is applied, the relative displacement of both sides can be formed by a thickness of 0.3mm or more, ideally 0.9mm or more. In particular, in the case of using a non-woven fabric for the aforementioned shear deformable layer 10, use a thickness of 0.3 to 5.0 mm, ideally 0.9 to 4.0 mm, and a basis weight of 30 to 400 g/m ² , ideally 70 to 300 g/m ² good.

In the case where the shear deformation layer 10 is provided on the non-skin side of the back sheet 2, the non-skin side of the shear deformation layer 10 is provided with an anti-displacement adhesive layer 11 for fixing to the outside of underwear or the like. The aforementioned anti-displacement adhesive layer 11, in the example shown in the figure, although three lines are arranged along the long side direction of the sanitary napkin 1 and spaced in the width direction, it can also be one or two, or 4 or more, in addition, it can also be arranged along the width direction of the sanitary napkin 1 and at intervals in the longitudinal direction. It can also be arranged in the aforementioned shear deformation. Layer 10 is almost comprehensive.

The aforementioned anti-displacement adhesive layer 11 is covered by a peelable sheet (not shown) that can be easily peeled off in the individual packaging state of the sanitary napkin 1 for use. The anti-displacement adhesive layer 11 is exposed and fixed to the outside. In addition, a mechanically-engaged hook member may be used instead of the aforementioned anti-displacement adhesive layer 11. The aforementioned hook material is particularly suitable when the absorbent article is composed of an inner pad mounted on the inner surface of a diaper outer body (outer body) such as an adult diaper.

(Example of Type 2)

Next, the shear deformation layer 10 of the second type example will be described: In this second type example, as shown in FIG. 4, the aforementioned shear deformation layer 10 is provided between the absorber 4 and the back sheet 2 , And the anti-displacement adhesive layer 11 is provided on the non-skin side of the back sheet 2. In this case, the parts arranged on the skin side of the aforementioned shear deformation layer 10 refer to the arrangement of the surface sheet 3, the second sheet 6, the absorber 4 and the wrapping sheet 5, and the side sheet 7 The part on the skin side of the surface sheet 3; the non-skin side of the shear deformed layer 10 refers to the back sheet 2, the anti-displacement adhesive layer 11, the underwear and the composition that faces the outside of the underwear when worn Fold it so that it wraps around the part of the side sheet 7 of the wing-shaped flap W of the crotch part of the underwear.

For the aforementioned shear deformation layer 10, it is desirable to use one that has liquid permeability but does not have a liquid absorption function, specifically, a foamed resin is used. Thereby, the liquid passes through the shear-deformed layer 10, but the liquid is not held in the shear-deformed layer 10. Therefore, even if it becomes a wet state, it can still be shear-deformed as in a dry state.

By disposing the aforementioned shear deformation layer 10 between the absorber 4 and the back sheet 2, the anti-displacement adhesive layer 11 will be disposed in the same form as the normal sanitary napkin 1 The outer surface of the back sheet 2 can more reliably prevent displacement from the underwear.

In order to make the relative displacement easy to be absorbed by the shear deformation of the shear deformation layer 10, that is, in order to prevent the displacement of the underwear from affecting the skin-side members arranged on the shear deformation layer 10, the Among the members on the skin side of the shear deformed layer 10, they extend from the outer edge of the shear deformed layer 10 to the outside, and this extended portion and the member arranged on the non-skin side of the shear deformed layer 10 (back sheet 2 ) The aforementioned extended portion of the joined members (the surface sheet 3, the second sheet 6 and the side sheet 7) can also be provided to allow the aforementioned shear deformation up to the junction with the aforementioned back sheet 2 The slack portion where the member arranged on the non-skin side of the layer 10 moves in the surface direction.

(Example of Type 3)

As shown in FIG. 5, the shear deformable layer 10 may also be provided on the non-skin side of the back sheet 2 and at the same time be provided between the absorber 4 and the back sheet 2. That is, the aforementioned shear deformable layer 10 may be arranged in two upper and lower stages so as to sandwich the back sheet 2. Thereby, the relative displacement between the underwear and the wearer's skin can be more reliably absorbed by the shear deformation layers 10 and 10. In this case, the anti-displacement adhesive layer 11 is provided on the non-skin side of the shear deformation layer 10 arranged on the non-skin side.

(Example of Type 4)

As shown in FIGS. 6 and 7, the aforementioned shear deformation layer 10 may be arranged in plural along the longitudinal direction of the sanitary napkin 1 with a predetermined interval in the width direction. The non-skin side surface of each shear deformation layer 10 is respectively provided with a displacement preventing adhesive layer 11. In this way, by dividing the shear deformation layer 10 and arranging it in plural, the shear deformation layer 10 becomes easy to shear deformation, and the friction between the sanitary napkin 1 and the wearer's skin is further reduced, and the wearing feeling becomes better.

In the example shown in the figure, although the aforementioned shear deformation layer 10 is provided on the back sheet 2 On the side of the skin, it may be provided between the absorber 4 and the back sheet 2, or may be provided in two places. In addition, the aforementioned shear deformable layer 10 may be arranged in plural along the width direction of the sanitary napkin 1 with a predetermined interval in the longitudinal direction. However, due to the displacement of the underwear accompanying the movement of the wearer, the displacement along the width direction of the sanitary napkin 1 is larger than the displacement along the longitudinal direction of the sanitary napkin 1. Therefore, it is desirable that the aforementioned shear deformation layer 10 is formed in plural along the longitudinal direction of the sanitary napkin 1 and spaced in the width direction.

(Example of Type 5)

As shown in FIG. 8, the aforementioned shear deformable layer 10 may be arranged in plural with predetermined intervals in the longitudinal direction and the width direction of the sanitary napkin 1. By independently providing a plurality of shear deformation layers 10 in the longitudinal direction and the width direction respectively, each shear deformation layer 10 becomes easy to shear deformation, and it becomes easy to absorb the contrast between the underwear and the wearer’s skin. At the same time, each shear deformation layer 10 can be independently sheared and deformed with different deformation amounts. Therefore, the shear deformation layer 10 provided in each part can be deformed according to different relative displacement amounts according to various parts of the body.

The planar shape of each shear deformation layer 10 is arbitrary and can be formed in a conventional shape, but it is ideally set to a circular shape that does not have the directionality of shear deformation.

In the example shown in the figure, although the aforementioned shear deformable layer 10 is provided on the non-skin side of the back sheet 2, it may be provided between the absorber 4 and the back sheet 2, or may be provided in two places.

1: Sanitary napkin for physiological use

2: Back sheet

3: Surface sheet

4: Absorber

5: Wrapping sheet

6: The second sheet

7: Side sheet

10: Shear deformation layer

11: Anti-shift adhesive layer

Claims (6)

An absorbent article having an absorbent body interposed between a surface sheet on the skin side and a back sheet on the non-skin side. The non-skin side of the main body part is provided with an anti-displacement member for fixing to the outside , Its characteristics are: A shear deformation layer is provided between the absorbent body and the anti-displacement member, and by the shear deformation of the shear deformation layer, a member arranged on the skin side of the shear deformation layer and a member arranged in the shear deformation The non-skin side members of the layer can be relatively displaced with respect to the surface direction. The absorbent article described in item 1 of the scope of patent application, wherein the shear deformation layer is made of foamed resin. The absorbent article described in item 1 or 2 of the scope of patent application, wherein the shear deformation layer is provided on the non-skin side of the back sheet, and the displacement preventing member is provided on the non-skin side of the shear deformation layer side. The absorbent article described in claim 1 or 2, wherein the shear deformation layer is provided between the absorbent body and the back sheet, and the anti-displacement member is provided on the non-skin of the back sheet side. The absorbent article described in any one of items 1 to 4 in the scope of the patent application, wherein the anti-displacement member is provided in a region overlapping the shear deformation layer in the thickness direction. As for the absorbent article described in any one of items 1 to 5 of the scope of the patent application, the aforementioned anti-displacement member is composed of an adhesive layer or a hook member.

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