JP7286371B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

Absorbent articles such as sanitary napkins, pantiliners, and incontinence pads have a basic structure including a topsheet, a backsheet, and an absorbent body provided between the topsheets. In recent years, many absorbent articles are provided with an adhesive anti-slip material that allows the absorbent article to be attached and fixed to underwear. Anti-slip members are often arranged in multiple rows continuously extending along the longitudinal direction or the width direction, as disclosed in Patent Document 1, for example.

JP 2018-15463 A

However, in the configuration as described in Patent Document 1, when the absorbent article receives force from the wearer's legs or the like while the absorbent article is worn, the absorbent article is deformed and the adjacent anti-slip members become absorbent. When the article is shifted in the lateral direction, the portion between the anti-slip members (the portion where the anti-slip member is not provided) may float on the skin side and wrinkles may occur. Furthermore, depending on the movement of the wearer, the anti-slip material near the wrinkles may peel off from the underwear, and the anti-slip material and the back sheet may stick together, or the adjacent anti-slip materials may stick together, causing twisting. becomes.

In view of the above points, it is an object of one aspect of the present invention to provide an absorbent article in which wrinkles are less likely to form in the vicinity of the anti-slip members during wearing and in which adjacent anti-slip members are suppressed from sticking together. do.

A first aspect of the present invention has a topsheet that is placed on the skin side when worn, a backsheet that is placed on the underwear side, and an absorbent body provided between the topsheet and the backsheet. An absorbent article comprising a main body, the main body having an elongated shape having a longitudinal direction and a transverse direction orthogonal to the longitudinal direction, wherein a slip stopper is provided on the back sheet side for suppressing slippage with respect to the underwear. In a plan view, the anti-slipping member includes a pair of arcuate portions that face each other in the transverse direction and project outward in the transverse direction, and an X arranged in the longitudinal direction of the pair of arcuate portions. shape part.

According to the first aspect, the anti-slip member includes a pair of arcuate portions that are opposed in the short direction and project outward in the short direction. As a result, even when the absorbent article receives force from both legs inward in the lateral direction while the absorbent article is being worn, the resistance to the force is high, so that the absorbent article is less likely to slip in the lateral direction. Therefore, when there is no anti-slip material between each arc-shaped portion, or when a plurality of pairs of arc-shaped portions are provided in the lateral direction, one of the pair of arc-shaped portions and another pair of arc-shaped portions adjacent to the one The part without the anti-slipping material between one of the parts is less likely to float up and wrinkles are less likely to occur. In addition, even if a large force is applied when the wearer moves, the anti-slip material does not easily peel off from the underwear.

Further, in this aspect, the anti-slip member includes an X-shaped portion arranged in the longitudinal direction of the pair of arcuate portions. Due to the shape of this X-shaped portion, it is possible to form a connecting portion having a certain amount of area at the center, and to secure a range in which the anti-slipping material spreads in all directions. Therefore, it is possible to increase the resistance to the force that the absorbent article receives in the lateral direction during wearing, and to further prevent wrinkles and the like.

By arranging the X-shaped portion in the longitudinal direction of the pair of arcuate portions, a high resistance force against deformation in the lateral direction is ensured in the portion beyond the longitudinal edge of the pair of arcuate portions. can do.

In the second aspect of the present invention, a plurality of the pair of arcuate portions and the X-shaped portions are provided and arranged alternately in the longitudinal direction.

According to the second aspect, the above-described actions of the pair of arcuate portions and X-shaped portion can be exerted over the longitudinal direction.

In the third aspect of the present invention, the pair of longitudinally adjacent arc-shaped portions and the X-shaped portion are connected.

According to the third aspect, the anti-slipping function of the anti-slipping material can be exhibited continuously over the longitudinal direction.

In the fourth aspect of the present invention, the distance between the lateral outer edge of one of the pair of arc-shaped portions and the lateral outer edge of the other of the pair of arc-shaped portions is longer than the distance between the edges.

According to the fourth aspect, since the distance between the arcuate portions in the lateral direction is widened, it is possible to reduce the possibility that the arcuate portions facing each other stick to each other.

In a fifth aspect of the invention, the angle of the X-shaped portion in said longitudinal direction is between 45 and 150 degrees.

According to the fifth aspect, since the linear portions of the X-shaped portion intersect at a predetermined angle, it is possible to satisfactorily ensure the range in which the X-shaped portion spreads.

In the sixth aspect of the present invention, the basis weight of the anti-slipping material in the arc-shaped portion is smaller than the basis weight of the entire anti-slipping material.

According to the sixth aspect, by making the basis weight of the anti-slipping material in the pair of arc-shaped portions relatively small, even when the opposing arc-shaped portions are stuck together, the sticking can be easily peeled off. become.

ADVANTAGE OF THE INVENTION According to one aspect of the present invention, it is possible to provide an absorbent article in which wrinkles are less likely to form in the vicinity of the anti-slip material during wearing and sticking of adjacent anti-slip materials to each other is also suppressed. .

FIG. 2 is a partial cutaway view of the absorbent article viewed from the topsheet side, for explaining the basic structure of the absorbent article according to the first embodiment. FIG. 2 is a sectional view taken along the line II of FIG. 1; Fig. 3 is a plan view of the absorbent article shown in Figs. 1 and 2 as viewed from the backsheet side; It is the elements on larger scale of the anti-slip material. It is the elements on larger scale which show the modification of a slip prevention material. FIG. 10 is a plan view of the absorbent article according to the second embodiment as viewed from the backsheet side; FIG. 11 is a plan view of a modified example of the absorbent article according to the second embodiment, viewed from the backsheet side;

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

First, the basic structure of an absorbent article according to one embodiment of the present invention will be described based on an example of a sanitary napkin. FIG. 1 shows a partially broken plan view of an absorbent article 1. As shown in FIG. 2 shows a cross-sectional view taken along the line II of FIG. FIG. 2 shows an anti-slipping member 9 (detailed later) which is not shown in FIG.

As shown in Figures 1 and 2, the absorbent article 1 comprises a body 8 having a backsheet 2, a topsheet 3 and an absorbent body 4 provided between the sheets 2,3. When the absorbent article 1 is worn, the top sheet 3 side is the side that touches the skin (skin side or surface side), and the back sheet 2 side is the side that is fixed to the underwear (underwear side or back side).

As shown in FIG. 1, the absorbent article 1 has a longitudinally elongated shape as a whole, having a predetermined length in the longitudinal direction D1 and a predetermined width in the transverse direction D2 orthogonal to the longitudinal direction D1. may have. Although the width of the absorbent article 1 is substantially constant in the illustrated example, it may vary along the longitudinal direction. In addition, as shown in FIG. 1, the absorbent article 1 can have a shape that is substantially symmetrical with respect to the center line extending in the longitudinal direction D1. Also, the configuration of the absorbent article 1 (including the thickness, density, etc. of the absorbent body 4) may be substantially symmetrical with respect to the center line, or may be asymmetrical.

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

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. A laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a laminated sheet of a nonwoven fabric in which a waterproof film is interposed to ensure substantially liquid impermeability can be used. Moreover, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability. Such water-impermeable/moisture-permeable sheet materials are produced by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. A porous sheet or the like can be used.

The surface sheet 3 can be a liquid-permeable sheet that allows body fluids such as menstrual blood, vaginal discharge, and urine to quickly pass through. As the surface sheet 3, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. The material fibers that make up the nonwoven fabric include, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton. It can be used in combination of two or more. Examples of nonwoven fabric processing methods include spunlace, spunbond, thermal bond, meltblown, needle punch, and the like. Among these processing methods, the spunlace method is preferable because it can produce a soft nonwoven fabric, the spunbond method is preferable because it can produce a nonwoven fabric with excellent drapeability, and the thermal bonding method is preferable because it can produce a bulky and soft nonwoven fabric. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc., in which a fiber having a high melting point is used as a core and a fiber having a low melting point is used as a sheath, can also be used.

Absorbent body 4 is not limited as long as it is a material that can absorb and retain bodily fluids, but preferably contains cotton-like pulp and a water-absorbing polymer. As the absorbent polymer, superabsorbent polymer (SAP), superabsorbent fiber (SAF), and combinations thereof can be used. The pulp includes chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Broad-leaved trees, softwoods, and the like are used as raw materials for chemical pulp, and softwoods are preferably used because of their long fiber length.

The absorbent body 4 may be mixed with synthetic fibers. As synthetic fibers, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. can also be used. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, and split type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath can also be used. It is also possible to use hydrophobic fibers surface-treated with a hydrophilizing agent to impart affinity to body fluids. The absorber 4 is preferably manufactured by a piling or airlaid method.

The thickness of the absorbent body 4 can be 0.3 to 30 mm, preferably 0.3 to 10 mm, more preferably 1 to 5 mm. The absorbent body 4 as a whole does not have to have a uniform thickness over the entire surface, and may have a structure in which the region corresponding to the bodily fluid outlet and the region in the vicinity thereof are swollen.

The absorbent body 4 may be wrapped with an enveloping sheet 5 made of crepe paper, non-woven fabric, or the like in order to retain its shape. By wrapping the absorbent body 4 with the enveloping sheet 5, the absorbent body 4 can be prevented from being twisted or cracked. As the enveloping sheet 5, non-colored (that is, white) crepe paper or non-woven fabric can be used, and colored ones can also be used. When a colored enveloping sheet 5 is used, the color of the enveloping sheet 5 can also be reflected as a light color from the top sheet 3 side. Therefore, the color of the discharged bodily fluid can be blended with the reflected color of the wrapping sheet 5 to make it inconspicuous. The enveloping sheet 5 can be colored, for example, in a complementary color to the body fluid color. For example, in an absorbent article (such as a sanitary napkin) designed to absorb menstrual blood, the enveloping sheet can be colored green, which is a complementary color of red.

Moreover, as shown in the figure, on both sides of the absorbent article 1 on the side of the topsheet 3, side portions extending in the longitudinal direction D1 are provided so as to overlap both edges of the absorbent body 4 in the transverse direction D2 in a plan view. Non-woven fabrics 7, 7 may be provided. As the side non-woven fabrics 7, 7, a non-woven fabric material subjected to appropriate water-repellent treatment or hydrophilic treatment can be used according to the purpose of preventing permeation of bodily fluids or enhancing touch feeling. The nonwoven material may be, for example, natural, synthetic or regenerated fibres. For water-repellent treatment of the side nonwoven fabric 7, a water-repellent agent such as a silicone-based or paraffin-based agent can be used.

At the edges in the longitudinal direction D1 of the absorbent article 1, the outer edges of the backsheet 2 and the topsheet 3 may be joined by adhesive such as hot melt, heat sealing, ultrasonic sealing or other bonding means. In addition, the side non-woven fabrics 7, 7 and the backsheet 2 may be joined together at the edge portions on both sides of the absorbent article 1 by at least one of the above-described adhesive means.

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

As shown in FIG. 2 (not shown in FIG. 1), the absorbent article 1 is provided with anti-slipping material 9 on the back sheet 2 side. The configuration of the anti-slip material will be described in detail below.

FIG. 3 shows a view of the absorbent article 1 according to the first embodiment viewed from the back sheet 2 side. The absorbent article 1 shown in FIG. 3 is the absorbent article 1 shown in FIGS. As shown in FIGS. 2 and 3, an anti-slip material 9 is arranged on the backsheet 2 side of the absorbent article 1 . The anti-slip material is an element that prevents the absorbent article 1 from slipping out of the underwear while the absorbent article 1 is worn on the underwear.

The material used for the anti-slipping material is a material that can suppress the slippage of the absorbent article 1 from the underwear when worn, and can easily remove the absorbent article 1 from the underwear after use. If so, it is not particularly limited. The anti-slipping material 9 is preferably formed as an adhesive layer. Also, it is preferable to use a hot-melt type adhesive. As the main component of the anti-slip material 9, a styrenic polymer, a tackifier, a plasticizer, and a combination thereof can be used.

Styrene-based polymers include styrene-ethylene-butylene-styrene block copolymers, styrene-butylene-styrene block copolymers, styrene-isobutylene-styrene copolymers, styrene-butadiene-styrene block copolymers, and the like. , one or more of these can be used. Among these, styrene-butadiene-styrene block copolymers are preferred in terms of good thermal stability. Moreover, as a tackifier and a plasticizer, a solid thing can be used at normal temperature. Examples of tackifiers include C5-based petroleum resins, C9-based petroleum resins, dicyclopentadiene-based petroleum resins, rosin-based petroleum resins, polyterpene resins, and terpene phenol resins. Examples of plasticizers include monomer plasticizers such as triflesyl phosphate, dibutyl phthalate, and dioctyl phthalate, as well as polymer plasticizers such as vinyl polymers and polyesters.

A method for providing the anti-slipping material 9 on the backsheet 2 is not particularly limited, but for example, melt coating using a hot-melt coater can be used. For example, coating devices such as gravure coaters, spray coaters, spiral guns, bead guns, etc. can be used. Further, the anti-slipping material 9 may be provided using a transfer roll. When a transfer roll is used, for example, after the pattern is transferred from the flat surface on which the pattern of the anti-slip material 9 is formed in advance to the transfer roll, the pattern can be transferred from the transfer roll to the backside sheet of the absorbent article manufactured in advance. can. By using a transfer roll, the accuracy of the relative position of the anti-slipping material 9 can be improved. Also, it is possible to easily change the basis weight depending on the location.

As shown in FIG. 3, the anti-slip material 9 is formed in a predetermined pattern so as to spread over at least the region where the absorbent body 4 is arranged on the back sheet 2 side. When viewed macroscopically, the anti-slipping member 9 has a configuration in which a plurality of rows (strips) 91, 92, and 93 extending along the longitudinal direction D1 are arranged. As in the example shown in FIG. 3, the anti-slipping material 9 has continuity along the longitudinal direction D1, so that the resistance to the external force acting along the longitudinal direction D1 can be improved. That is, it is possible to improve the function of preventing displacement along the longitudinal direction D1. Note that the continuity of the anti-slip material along a predetermined direction does not necessarily mean that the material layer of the anti-slip material is continuously formed on the back sheet 2 side. The material layer may be intermittent in a predetermined direction as long as it can be recognized as a unit.

FIG. 4 shows a partially enlarged view of the anti-slipping member 9 of FIG. As shown in FIGS. 3 and 4, the anti-slip member 9 includes a pair of arcuate portions 9A and an X-shaped portion 9B.

As shown in FIG. 4, the pair of arcuate portions 9A face each other in the short direction and protrude outward in the short direction D2. That is, both portions of the pair of arcuate portions 9A face each other in the lateral direction D2 so that the inner sides of the arcs face each other. Due to such a shape, even if an external force is applied to the pair of arcuate portions 9A from both sides in the lateral direction D2, compared to a pair of anti-slipping material portions extending linearly in the longitudinal direction D1, for example, Highly resistant to external forces. Therefore, since the pair of arcuate portions 9A are less likely to approach each other, the portion surrounded by the pair of arcuate portions 9A and having no anti-slipping material is less likely to float up and wrinkles are less likely to occur.

In this way, since the resistance force of the pair of arcuate portions 9A is respectively high, when the anti-slipping member 9 is composed of a plurality of rows 91, 92, 93 spaced apart from each other (FIG. 3), etc., the plurality of rows Since the 91, 92, 93 are less likely to be displaced and less likely to come close to each other, the portions between the plurality of rows 91, 92, 93 where there is no anti-displacement material are prevented from floating and wrinkles that may occur along with this are prevented.

In addition, when the wearer's exercise such as walking exerts a greater force on the absorbent article 1 from both legs, the anti-slipping material is partially peeled off from the underwear in the vicinity of the wrinkles caused by the lifting of the absorbent article. may be lost. In such a case, the anti-slipping material 9 and the backsheet 2 or the adjacent anti-slipping materials 9 may stick together near the wrinkles. In particular, once the anti-slipping materials 9 are attached to each other, it may not be possible to peel them off, causing twisting, which may cause leakage or uncomfortable feeling.

On the other hand, for example, even if the portions of the pair of arcuate portions 9A come together and part of the anti-slip material is peeled off, in the example shown in the figure, each portion of the pair of arcuate portions 9A is aligned in the lateral direction D2. Since they are spaced apart, the portions of the pair of arcuate portions 9A are less likely to stick together.

Further, in the case where the anti-slipping material 9 is composed of a plurality of rows 91, 92, 93 separated from each other (FIG. 3), etc., even if the rows are close to each other, in the illustrated arrangement, a pair of The arcuate portions 9A are unlikely to contact each other continuously along the longitudinal direction D1, and contact only at a point or a short line at the most protruding position of the arcuate portions 9A in the transverse direction D2. Therefore, even if the rows 91, 92, and 93 extending in the longitudinal direction D1 of the anti-slipping material 9 are shifted in the lateral direction D2 and approach each other, and the pair of arcuate portions 9A stick to each other, they can be quickly peeled off. Therefore, the user can easily correct misalignment and twisting of the absorbent article 1 .

In this way, the anti-slipping member 9 is configured by combining the pair of arcuate portions 9A and the X-shaped portion 9B, which provides high resistance to deformation especially in the lateral direction D2 and adhesion of the anti-slipping members to each other. It is possible to secure the difficulty of sticking and the ease of peeling when sticking. In addition, as shown in FIG. 3, when a plurality of rows of the anti-slip members 9 having continuity are provided along the longitudinal direction D1, in both the longitudinal direction D1 and the lateral direction D2, As a result, in all directions including oblique directions, it is possible to ensure high resistance to deformation, difficulty in sticking of the anti-slip members to each other, and ease of peeling off when sticking.

Therefore, the absorbent article 1 according to this embodiment can be worn continuously in an appropriate state without wrinkles or twists, and even when the absorbent article is worn for a long time or when the wearer moves a lot, leakage and It is possible to prevent discomfort and the like.

In the pair of arc-shaped portions 9A, the distance a between the outer edge of one arc-shaped portion in the transverse direction D2 and the outer edge of the other arc-shaped portion in the transverse direction D2 is the longitudinal direction of the pair of arc-shaped portions 9A. The ratio (a/b) to the distance b between both edges of D1 (between the front end and the rear end in the longitudinal direction D1) is preferably greater than 1, more preferably 1.2 or more, and 1 0.5 or more is more preferable. In particular, a/b is greater than 1, that is, the distance a between the outer edge of one arcuate portion in the transverse direction D2 and the outer edge of the other arcuate portion in the transverse direction D2 is the pair of arcuate portions 9A. By being longer than the distance b between both edges in the longitudinal direction D1, both arcuate portions are less likely to approach each other when force is applied from the outside to the inside in the transverse direction D2, and even if they do approach, they are less likely to stick to each other. . Moreover, the above a/b is preferably 2.5 or less, more preferably 2 or less. As a result, the pair of arcuate portions 9A can be formed in such a manner that they are curved so as to exhibit resistance to external forces.

The distance a between the outer edge in the transverse direction D2 of one arc-shaped portion and the outer edge in the transverse direction D2 of the other arc-shaped portion is preferably 5 to 30 mm, more preferably 12 to 20 mm. Also, the distance b between both edges of the pair of arcuate portions 9A in the longitudinal direction D1 is preferably 3 to 20 mm, more preferably 5 to 10 mm.

Also, the radius of curvature of the pair of arcuate portions 9A is preferably 2.5 mm to 15 mm, more preferably 5 mm to 10 mm, at least at the center in the longitudinal direction D1.

The X-shaped portion 9B of the anti-slipping member 9 has a shape in which two linear anti-slipping members intersect. Alternatively, it can be said that the four linear portions 9B _L1 , 9B _L1 , 9B _L2 , and 9B _L2 radially extend evenly or unevenly from the central portion 9B _C . The linear portions 9B _L1 and 9B _L1 and the linear portions 9B _L2 and 9B _L2 are portions extending to different sides in the longitudinal direction D1. In FIG. 4, the linear portions 9B _L1 and 9B _L1 extend obliquely upward, and the linear portions 9B _L2 and 9B _L2 extend obliquely downward. With such a shape in which a plurality of linear portions extend around, the anti-slipping material can be extended in at least four directions, so that the anti-slipping material spreads in the longitudinal direction D1 and the transverse direction D2. The range can be secured with a certain amount of area. Therefore, the X-shaped portion 9B can reinforce the anti-slip function of the pair of arcuate portions 9A. In addition, since the anti-slipping material can be densely arranged in the center, the X-shaped portion 9B can exert anti-slipping function in all directions, especially at the central portion.

When an imaginary circle _Cr is drawn in the range where the anti-slipping material 9 exists in the central portion 9BC of the X-shaped portion 9B, the diameter of the imaginary circle Cr can be 1 to 10 mm. Also, the distance c between both edges of the X-shaped portion 9B in the lateral direction D2 is preferably 2.5 to 15 mm, more preferably 5 to 10 mm. Also, the distance d between both edges in the longitudinal direction D1 of the X-shaped portion 9B (between the front edge and the rear edge in the longitudinal direction D1) is preferably 1.5 to 15 mm, more preferably 2.5 to 7 mm. It is more preferable to have Such a shape and size of the X-shaped portion 9B reinforces the anti-slip function of the pair of arcuate portions 9A without interfering with the action of the pair of arcuate portions 9A exhibiting high resistance to external force. The anti-slip function of the stopper member 9 as a whole can be improved and secured.

Also, the angle α of the X-shaped portion 9B in the longitudinal direction D1 is preferably 45 to 150°. The angle α is an angle formed by two linear portions (for example, linear portions 9B _L1 and 9B _L1 ) extending in one of the longitudinal directions D1 among the four linear portions of the X-shaped portion 9B in FIG. . By setting the angle as described above, it is possible to secure a range in which the X-shaped portion 9B spreads in both the longitudinal direction D1 and the lateral direction D2, thereby improving the function of preventing the X-shaped portion 9B from slipping.

Linear portions 9B _L1 , 9B _L1 , 9B _L2 , and 9B _L2 of the X-shaped portion 9B are preferably linear. For example, two U-shaped linear portions (or portions on the end side of the long axis of the ellipse) may be overlapped so that the closed sides of the U-shape face each other. Regardless of whether the overlapping direction is the longitudinal direction D1 or the lateral direction D2, if the area of the entire X-shaped portion 9B is the same, the area of the central portion _9BC where the linear portions are connected increases, and the linear portions area will decrease. As a result, the range in which the X-shaped portion 9B spreads is reduced, and there is a possibility that the anti-slip function of the X-shaped portion 9B is deteriorated. On the other hand, according to the above embodiment, the range in which the X-shaped portion 9B spreads can be increased, and the function of preventing the X-shaped portion 9B from slipping can be improved.

It is preferable that the range over which the pair of arcuate portions 9A extend is larger than the range over which the X-shaped portion 9B extends. For example, the distance a between the outer edge in the transverse direction D2 of one arc-shaped portion and the outer edge in the transverse direction D2 of the other arc-shaped portion is the distance between the edges in the transverse direction D2 of the X-shaped portion 9B. It is preferably larger than c. Moreover, it is preferable that the distance b between both edges in the longitudinal direction D1 of the pair of arcuate portions 9A is also greater than the distance d between both edges in the longitudinal direction D1 of the X-shaped portion 9B. As a result, the above-described effect of improving the resistance of the pair of arcuate portions 9A against the force from the outside is exhibited even more.

The width w _A of each portion of the pair of arcuate portions 9A is preferably 0.5 mm to 15 mm, more preferably 2 mm to 5 mm. The width w _A of the arcuate portion may be the same or different depending on the location. If the width w _A varies from place to place, the above numerical range can be the average width. Also, the width w _A can be larger near the center in the longitudinal direction D1 than near the edges in the longitudinal direction D1, and preferably reaches the maximum width w _Amax at the center in the longitudinal direction D1. With such a configuration in which the central width is increased, it is possible to further increase the resistance to the force from the outside in the short direction D2 by the pair of arcuate portions 9A. The maximum width w _Amax is preferably 0.5 to 10 mm, more preferably 2 to 6 mm.

On the other hand, the width w _B of the X-shaped portion 9B is preferably 0.5-10 mm, more preferably 1.5-5.5 mm. The width w _B may also be the same or different depending on the location, similar to the width w _A . If the width _wB varies from place to place, the above numerical range can be the average width. Also, the width w _B of the X-shaped portion 9B is preferably smaller than the maximum width w _Amax of the pair of arcuate portions 9A, and can be smaller than the width w _A of the pair of arcuate portions 9A.

In this way, according to this embodiment, the anti-slipping member 9 includes both the pair of arcuate portions 9A and the X-shaped portion 9B, so that even if force is applied from the leg or the like during wearing, the anti-slipping member 9 will remain in the initial position. It is possible to prevent slippage, and even if slippage occurs, the anti-slip material 9 is unlikely to stick to each other, so that the absorbent article can be prevented from wrinkling or wrinkling.

As shown in FIG. 4, the pair of arcuate portions 9A are preferably line-symmetrical (left-right symmetrical) with respect to the axis extending along the longitudinal direction D1, and with respect to the axis extending along the lateral direction D2. Although it is preferable that they are linearly symmetrical (vertically symmetrical), the shape of the pair of arcuate portions 9A does not have to be left-right symmetrical, nor does it have to be vertically symmetrical. Similarly, the X-shaped portion 9B is also preferably axisymmetrical (laterally symmetrical) with respect to the axis extending along the longitudinal direction D1, and is axisymmetrically (upper and lower) with respect to the axis extending along the lateral direction D2. symmetrical).

Further, as shown in FIG. 4, the center line _LA extending along the longitudinal direction D1 of the pair of arcuate portions 9A and the center line _LB extending along the longitudinal direction D1 of the X-shaped portion 9B are aligned. preferably. In this case, the row of anti-slip members along the longitudinal direction D1 formed by the pair of arc-shaped portion 9A and X-shaped portion 9B can be bilaterally symmetrical as a whole.

The relative arrangement of the pair of arcuate portions 9A and the X-shaped portion 9B is not particularly limited as long as the pair of arcuate portions 9A and the X-shaped portion 9B are arranged in the longitudinal direction D1. As shown in FIG. 4, the pair of arcuate portions 9A and X-shaped portions 9B are preferably alternately arranged along the longitudinal direction D1. Furthermore, it is preferable that a pair of arcuate portions 9A and X-shaped portions 9B are alternately arranged. As a result, the above-described actions of the pair of arcuate portions 9A and X-shaped portion 9B can be exerted over the longitudinal direction D1. In the longitudinal direction D1, n pairs of arcuate portions 9A (n is 2 or more, preferably 2 to 4) and one X-shaped portion 9A may be arranged alternately. and m X-shaped portions 9A (m is 2 or more, preferably 2 to 4) arranged alternately.

FIG. 5 shows a partially enlarged view of a modification of the anti-slipping member 9 in the first embodiment. In the example of FIG. 5 as well, the anti-slipping member 9 includes a pair of arcuate portions 9A and an X-shaped portion 9B, but the distance between the pair of arcuate portions 9A and the X-shaped portion 9B is greater than that in the example shown in FIG. is also big. That is, in the example shown in FIG. 4, the pair of arcuate portions 9A and X-shaped portion 9B overlapped when viewed in the longitudinal direction D1, but in the example shown in FIG. do not overlap when viewed in the longitudinal direction D1.

The basis weight of the anti-slipping material 9 may be uniform over the entire area or may vary depending on the location. For example, the basis weight can be changed between the pair of arcuate portions 9A and X-shaped portions 9B. In this case, the basis weight of the pair of arcuate portions 9A can be made smaller than the basis weight of the X-shaped portion 9B. When the wearer moves greatly, there is a possibility that the arcuate portions of the pair of arcuate portions 9A stick to each other. can be prevented. The weight of the anti-slipping material 9 as a whole can be 5 to 60 g/m ² .

As shown in FIG. 3, the anti-slipping member 9 is configured by arranging a plurality of rows 91, 92, 93 along the longitudinal direction D1 each of which is a combination of a pair of arcuate portions 9A and X-shaped portions 9B. . Preferably, the number of such columns is 3-6. The configuration of each row (the size, dimensions, and arrangement of the pair of arcuate portions 9A and X-shaped portions 9B) may be the same or different. However, the plurality of rows are preferably arranged so that the pair of arcuate portions 9A are aligned in the lateral direction D2, and each portion of the pair of arcuate portions 9A is the most outwardly convex when viewed in the lateral direction D2. A position is preferably aligned between multiple columns.

The spacing e between rows (FIG. 3), more specifically, the minimum spacing between rows is preferably 2 to 15 mm, more preferably 3 to 10 mm. In the illustrated example, the pair of arcuate portions 9A are arranged in the lateral direction D2, that is, the pair of arcuate portions 9A in one row and the pair of arcuate portions 9A in another row adjacent to the row are arranged in a short direction. Since they are aligned in the hand direction D2, the spacing e corresponds to the minimum distance between a pair of arcuate portions 9A in one row and a pair of arcuate portions 9A in another row adjacent to that row.

The ratio (a/e) of the distance a between the outer edge of one arcuate portion in the transverse direction D2 and the outer edge of the other arcuate portion in the transverse direction D2 to the interval e between the rows is , is preferably 0.8 to 3.5, more preferably 1 to 3.2, even more preferably 1.6 to 3. With the above range, when the absorbent article 1 is displaced in the lateral direction D2, it is possible to prevent the anti-slip material 9 from sticking between the rows, while ensuring the optimum anti-slip function of the anti-slip material 9. can do.

FIG. 6 shows the structure of the anti-slipping material 9 in the absorbent article 11 according to the second embodiment. FIG. 6 is also a view of the absorbent article 11 viewed from the back sheet 12 side, similar to FIG. Also in the example shown in FIG. 6, a pair of arcuate portions 19A and an X-shaped portion 19B are alternately arranged along the longitudinal direction D1, but unlike the example shown in FIG. The X-shaped portion 19B is connected in the longitudinal direction D1. That is, the rear edges in the longitudinal direction D1 of the pair of arcuate portions 19A are respectively connected to the front edges (front edges of the linear portions) of the X-shaped portions 19B arranged behind them. The rear edge of 19B is connected to the front edge in the longitudinal direction D1 of the pair of arcuate portions 19A arranged further behind, respectively, and this connection relationship continues over the longitudinal direction D1. Such a connection can be said to be formed by extending each linear portion of the X-shaped portion 9B of the anti-slip member 9 shown in FIG.

Thus, when the pair of arcuate portions 19A and X-shaped portions 19B are connected in the longitudinal direction D1, it is possible to improve the anti-slip function. In addition, when removing the absorbent article 1 from the underwear after use, the user normally peels off the anti-slipping material 19 from the underwear in the longitudinal direction D1. Removal is also smooth. Also, the noise generated during removal is reduced.

FIG. 7 shows another example of the absorbent article 11 according to the second embodiment. The absorbent article 11 shown in FIG. 7 is a so-called nighttime sanitary napkin, which is longer in the longitudinal direction D1 than the sanitary napkins shown in FIGS. A flap-like portion is formed to Similarly, in such a large-sized napkin, a pair of arcuate portions 19A projecting outward in the widthwise direction D2 facing each other in the widthwise direction D2 and an X-shaped portion arranged in the lengthwise direction D1 of the pair of arcuate portions 19A It is possible to form the anti-slip material 19 including the portion 19B. The configuration (shape and dimensions) of the pair of arcuate portions 19A and the X-shaped portion 19B may be similar to those described above, but in the case of an absorbent article having a large overall size, for example, the pair of arcuate portions 19A and the X-shaped portion 19B Three or more, preferably four or more rows of anti-slip members 19 alternately arranged with X-shaped portions 19B can be formed. In this way, the anti-slipping material can be appropriately configured according to the size of the absorbent article to be used, the application, and the like.

Although the embodiment of the present invention has been described above by taking a sanitary napkin as an example, the present embodiment is also applicable to a panty liner, an absorbent pad for incontinence, a pad-type diaper, etc., in addition to the sanitary napkin. be able to.

1, 11 Absorbent article 2, 12 Back sheet 3 Top sheet 4 Absorbent body 5 Wrapping sheet 7 Side nonwoven fabric 8, 18 Absorbent article main body 9, 19 Anti-slip material 9A, 19A A pair of arcuate portions 9B, 19B X-shaped portion 9B _L1 , 9B _L2 Linear portion of X-shaped portion 9B _C Center portion D1 of X-shaped portion First direction (longitudinal direction)
D2 Second direction (transverse direction)
L _A Longitudinal centerline of the pair of arcuate portions L _B Longitudinal centerline of the X-shaped portion

Claims (5)

It comprises a main body having a topsheet that is placed on the skin side when worn, a backsheet that is placed on the underwear side, and an absorbent body provided between the topsheet and the backsheet, wherein the main body has a longitudinal direction. An absorbent article having an elongated shape having a direction perpendicular to the longitudinal direction and a lateral direction orthogonal to the longitudinal direction,
A non-slip material is provided on the back sheet side for suppressing the slippage of the underwear,
The anti-slipping member comprises, in a plan view, a pair of arcuate portions that face each other in the transverse direction and project outward in the transverse direction, and an X-shaped portion of the pair of arcuate portions arranged in the longitudinal direction. including
The width of each of the pair of arcuate portions is thicker at the center in the longitudinal direction,
The X-shaped portion includes four linear linear portions, and the angle formed by two linear portions extending in one of the longitudinal directions of the linear portions is the short side of the X-shaped portion. An absorbent article that is between 45 and 150° in the direction center . 2. The absorbent article according to claim 1, wherein a plurality of said pair of arcuate portions and said X-shaped portions are respectively provided and arranged alternately in said longitudinal direction. 3. The absorbent article according to claim 2, wherein said pair of longitudinally adjacent arcuate portions and said X-shaped portion are connected. 3. The distance between the outer edge in the lateral direction of one of the pair of arcuate portions and the outer edge in the lateral direction of the other of the arcuate portions is longer than the distance between the both edges in the longitudinal direction of the pair of arcuate portions. 4. The absorbent article according to any one of 1 to 3. The absorbent article according to any one of claims 1 to 4 , wherein the basis weight of the anti-slipping material in the arc-shaped portion is smaller than the basis weight of the entire anti-slipping material.

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