JP6360595B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, incontinence pads and the like for absorbing menstrual blood and vaginal discharge, and more specifically, an absorbent having a barrier for preventing side leakage and an embossed groove formed in the absorbent body. It relates to goods.

  Conventionally, as absorbent articles such as panty liners, sanitary napkins, incontinence pads, liquid-impervious back sheets such as polyethylene sheets or polyethylene sheet-laminated nonwoven fabrics, and liquid-permeable surface sheets such as nonwoven fabrics or liquid-permeable plastic sheets There is known an intervening absorber made of cotton-like pulp or the like.

  In recent years, in the case of a relatively bulky absorbent article using this type of pulp fiber, there are problems such as being easily noticeable by affecting the body line, being inconvenient to carry, and having poor storage properties. In view of demands for more efficient logistics and resource saving, thin absorbent articles using airlaid pulp nonwoven fabric (hereinafter also simply referred to as airlaid) as absorbents tend to be preferred. However, problems have often been pointed out, such as the amount of absorption being inferior with the thinning of the absorber, and the possibility of forming side gaps with the skin due to difficulty in forming irregularities on the surface. The problem of a decrease in the amount of absorption has been solved by increasing the content of the superabsorbent resin, but sufficient measures have been taken against the problem of leakage from the gap. I can't say that.

  Numerous improvements have been made on this type of absorbent article, and various means for preventing body fluid leakage have been taken. For example, in the following Patent Document 1, an air-laid nonwoven fabric and a liquid-permeable sheet disposed on one surface side of the air-laid nonwoven fabric, the air-laid nonwoven fabric and the liquid-permeable sheet are embossed together to form the liquid-permeable material. An absorbent body in which a number of discrete individual recesses are formed on the side of the sheet, a part of the liquid-permeable sheet is opened in the recess and a part of the airlaid nonwoven fabric is exposed. It is disclosed.

  Patent Document 2 below discloses a bodily fluid absorbent article that can absorb and absorb liquid by folding back the end portion of the absorber.

JP 2003-204993 A Japanese Patent Laid-Open No. 2007-50024

  However, in the absorbent body described in Patent Document 1, since the air-laid nonwoven fabric and the liquid-permeable sheet are both embossed to form a plurality of independent and discontinuous recesses, the recesses are cured by embossing. There was a risk that the feeling of wearing would worsen. Moreover, in the absorber of the said patent document 1, although the embossing forms a recessed part, the excrement flows into this recessed part, and the leak is prevented by preventing the flow beyond it, thin absorption In the case of an absorbent article, a concave portion having a sufficient depth cannot be formed in the absorbent body, so that the embossed concave portion alone is insufficient to prevent the side leakage of body fluid.

  Moreover, in the case of the bodily fluid absorbent article described in Patent Document 2, a barrier is formed by folding the side end of the absorbent body. However, in the case of a thin absorbent article, the side end is simply folded. There was a risk that side leakage would occur because a sufficiently high barrier for preventing side leakage was not formed. Further, when only one barrier is formed on the side end portion so as to protrude to the skin side, there is a problem in that a sense of incongruity occurs and the wearing feeling deteriorates.

  Further, in the case of a thin absorbent article, since the unevenness of the surface is small, a gap is easily formed between the skin and the side leakage easily occurs. In particular, on both sides in the width direction, the body line is curved in the width direction with the central portion at the top, so a gap is easily formed between the skin and side leakage is likely to occur.

  Then, the main subject of this invention is providing the absorbent article which prevented the side leakage reliably, without deteriorating a feeling of mounting | wearing also in a thin absorbent article.

In order to solve the above problems, as the present invention according to claim 1, in an absorbent article in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
The absorbent body has a pair of left and right first barriers that protrude toward the skin side along a substantially longitudinal direction on the skin surface side of the absorbent body that is formed in a planar shape, and is outside the first barrier and absorbs the absorbent body. A pair of left and right second barriers projecting to the skin side along the side edges of the body are provided, and each of the first barrier and the second barrier is intermediate between the first barrier and the second barrier, and is substantially longitudinal on the skin surface side of the absorbent body. Embossed grooves along the direction are formed,
Each of the first barrier and the second barrier is configured by folding a sheet-like absorber separate from the absorber main body in the width direction, and the second barrier is closer to the skin than the first barrier. Protruding high,
The liquid-permeable surface sheet is disposed between the liquid-permeable surface sheet and the absorber surface between the first barrier and the second barrier so as to integrally cover the first barrier and the second barrier. There is provided an absorbent article characterized in that the space is provided.

In the first aspect of the present invention, the pair of left and right first barriers and second barriers projecting to the skin side provided substantially along the longitudinal direction on the skin surface side of the absorbent main body formed in a planar shape , Since the body fluid flowing in the width direction is blocked, even when a thin absorber is used, side leakage can be reliably prevented. Furthermore, since an embossed groove along the longitudinal direction is provided on the skin surface side of the absorbent body between the first barrier and the second barrier, even if body fluid flows over the first barrier, Since it can diffuse quickly in the longitudinal direction along the embossed groove and can be received in a wide range of the second barrier, side leakage can be surely prevented.

  In addition, since the two barriers, the first barrier and the second barrier, are provided on both sides in the width direction so as to be separated from each other in the width direction, The contact makes it possible to greatly reduce the sense of discomfort when worn.

In the present invention, each of the first barrier and the second barrier is configured by folding a sheet-like absorber separate from the absorber main body in the width direction. For this reason, the first barrier and the second barrier can be easily provided by using a thin absorber such as an airlaid pulp nonwoven fabric as the sheet-like absorber. In addition, as the said sheet-like absorber, the same material as the absorber body may be used, or a different one may be used.

By forming the second barrier so as to protrude higher on the skin side than the first barrier, it is possible to reduce a sense of incongruity at the time of wearing, not to impair the wearing feeling, and to reliably prevent leakage of bodily fluids.

Further , in the present invention, the liquid-permeable surface sheet absorbs the liquid-permeable surface sheet between the first barrier and the second barrier so as to integrally cover the first barrier and the second barrier. It is arrange | positioned so that a space may be provided between body surfaces.

  There is a space between the liquid-permeable surface sheet and the absorber surface between the first barrier and the second barrier so that the liquid-permeable surface sheet integrally covers the first barrier and the second barrier. By arranging so as to be provided, the unevenness of the first barrier and the second barrier is reduced, and the uncomfortable feeling at the time of wearing can be alleviated.

  As the present invention according to claim 2, there is provided the absorbent article according to claim 1, wherein the absorbent body is made of an airlaid pulp nonwoven fabric.

  In the invention according to the second aspect, the absorbent body is thinned by using an airlaid pulp nonwoven fabric as the absorbent body.

  As a third aspect of the present invention, a pair of left and right vertical embosses extending substantially along the longitudinal direction is formed on the liquid-permeable surface sheet surface side, and the first barrier is formed along the outside of the vertical embossing. An absorbent article according to any one of claims 1 and 2 is provided.

  In the third aspect of the invention, by forming the first barrier along the outside of the vertical embossing, the feeling of unevenness is reduced and the uncomfortable feeling during wearing is alleviated.

According to a fourth aspect of the present invention, the embossed groove is composed of a straight section formed by a straight line along the longitudinal direction, and an inclined section that is continuous from both ends thereof and is inclined toward the inner side in the width direction. An absorbent article according to any one of claims 1 to 3 is provided.

In the invention of claim 4 , the embossed groove is composed of a straight section and an inclined section that is continuous from both ends thereof and is inclined toward the inner side in the width direction, thereby flowing the body fluid along the embossed groove. Can be guided to the inside in the width direction of the absorbent body at both ends in the longitudinal direction, and side leakage can be prevented more reliably.

As the present invention according to claim 5 , the absorbent article is folded in the longitudinal direction at the folding line in the width direction when individually packaged,
The absorbent article according to any one of claims 1 to 4 , wherein each of the first barrier and the second barrier is provided with a cut substantially along the width direction in a region overlapping the width-direction fold line.

In the invention according to claim 5 , when the absorbent article is folded in the longitudinal direction along the widthwise fold line during individual packaging, the first barrier and the second barrier are creased to serve as a barrier during mounting. In order to prevent the function from deteriorating, creases are reduced by providing a cut along the width direction in a region overlapping the width direction fold line of the first barrier and the second barrier.

  As described above in detail, according to the present invention, it is possible to reliably prevent side leakage without deteriorating the wearing feeling even in a thin absorbent article.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view (cross-sectional view). 3 is a cross-sectional view of the absorber 4. FIG. 4 is a plan view of the absorber 4. FIG. (A), (B) is the principal part enlarged view of the sanitary napkin 1. FIG.

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

[Basic structure of sanitary napkin 1]
As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the present invention has a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, or the like, and a permeate that quickly permeates menstrual blood or a cage. The liquid surface sheet 3, the absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between the two sheets 2 and 3, and the liquid permeable surface sheet 3 and the absorbent body 4. It is mainly composed of a second sheet 6 made of a hydrophilic non-woven fabric, and side non-woven fabrics 7 and 7 disposed on both sides of the surface along the longitudinal direction. Around the absorbent body 4, at the front and rear edge portions in the napkin longitudinal direction, the outer edge portion of the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 is formed of an adhesive such as hot melt, heat seal, or the like. The liquid-impervious back sheet 2 and the side nonwoven fabric 7 which are joined by an adhesive means and extend laterally from the edge of the absorbent body 4 at both side edges thereof are adhesives such as hot melt or heat. The outer periphery flap part in which the absorber 4 does not exist is formed on the outer periphery by being bonded by an adhesive means such as a seal.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Of these processing methods, the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability, and the thermal bond method and the air-through method are excellent in terms of being bulky and soft.

  The absorber 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is preferably made of an airlaid pulp nonwoven fabric. The airlaid pulp non-woven fabric is defibrated with a predetermined length of fiber, transported in a flow of air, passed through a screen having a wire mesh or fine pores, and then dropped and deposited on a wire mesh to form a web. It is a sheet-like absorbent body that is formed and formed by heat-bonding the intersections of the fibers in the web with binder fibers or bonding the fiber intersections with an emulsion binder. In addition, you may make it increase a water absorption capacity | capacitance by mixing a granular high water absorption polymer suitably in the said web fiber. As fibers constituting the air-laid pulp nonwoven fabric, short fibers of thermoplastic fibers are used in addition to pulp fibers. Examples of thermoplastic fibers include polypropylene, low-density polyethylene, linear low-density polyethylene, olefins such as crystalline propylene copolymer composed of propylene and α-olefin, polyamides, polyethylene terephthalate, polybutylene terephthalate, and diol. Examples thereof include various synthetic fibers such as polyesters such as low-melting point polyester copolymerized with terephthalic acid / isophthalic acid and polyester elastomer.

  As the binder fiber, a heat-fusible conjugate fiber composed of a low-melting resin and a high-melting resin having different melting points, and the low-melting resin forming at least a part of the fiber surface is preferably used. As the form of the heat-fusible composite fiber, any composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can be used.

  As the emulsion binder, any of an aqueous emulsion binder and an organic solvent-based emulsion binder can be used, but an aqueous emulsion binder is preferably used from the viewpoints of handleability and safety. As the binder component, acrylic resin, vinyl acetate resin, styrene butadiene resin, and the like can be used.

  Instead of using an airlaid pulp nonwoven fabric as the absorbent body 4, it is also possible to use a pile absorbent body. When using a fiber absorbent, a mold in which concave portions for the first barrier 10 and the second barrier 11 are formed in the absorber main body 4A described in detail later, The first barrier 10 and the second barrier 11 are formed integrally with the absorber body 4A. As the pile absorbent, for example, a material in which a highly water-absorbent resin is mixed in pulp or a material in which chemical fibers are mixed in a pulp and a highly water-absorbing polymer is mixed is used. The absorbent body 4 is preferably surrounded by crepe paper in order to maintain the shape and quickly diffuse menstrual blood and the like, and to prevent reversal of once absorbed menstrual blood or the like.

  Further, the absorbent body 4A has a substantially uniform density in the width direction and the longitudinal direction except for the region where the longitudinal embossing 8 and the embossing groove 12 described in detail later are provided. That is, when an airlaid pulp nonwoven fabric is used as the absorbent body 4, the absorbent body is not compressed except for the longitudinal emboss 8 and the embossed groove 12. This improves the wearability of the thin napkin with no gore and uncomfortable feeling, and the body fluid absorbed by the absorbent body can be quickly diffused and absorbed without changing the diffusion speed in the width direction and the longitudinal direction. Can be absorbed.

  Since the sanitary napkin 1 is mainly intended for a thin napkin, it is desirable not to provide a middle-high portion thicker than the peripheral absorber thickness in a region corresponding to the body fluid discharge portion.

  On the other hand, side nonwoven fabrics 7 and 7 are provided on both sides of the sanitary napkin 1 on the surface side, respectively, along the longitudinal direction and over almost the entire length of the napkin 1. While these side nonwoven fabrics 7 and 7 are extended to the side, the side flap part is formed with the liquid-impermeable back sheet 2 also extended to the side.

  As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of an important function. For example, if importance is placed on functions such as preventing the penetration of bodily fluids or enhancing the feeling of touch, it is necessary to use a water-repellent non-woven fabric coated with a silicon-based, paraffin-based, or alkylchromic chloride-based water repellent. desirable. Further, if importance is attached to the absorbability of body fluid in the side nonwoven fabric 7, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, or stannic chloride Treatment with a metal salt, such as by partially dissolving the surface to make it porous and depositing metal hydroxide, etc. It is desirable to use a nonwoven fabric.

  On the surface side of the liquid-permeable top sheet 3, a pair of left and right longitudinal embosses 8 and 8 are formed along a substantially longitudinal direction. The vertical embossing 8 is embossed from the surface side of the liquid-permeable surface sheet 3 to the absorbent body 4 (absorber body 4A), and joins the liquid-permeable surface sheet 3 and the absorbent body 4 together. And for the purpose of preventing diffusion of bodily fluids. The planar shape is continuously formed without being divided in the longitudinal direction, and in the illustrated example, a pair of left and right longitudinal embosses 8 and 8 are formed by straight lines extending in the longitudinal direction of the napkin on both sides in the width direction corresponding to both sides of the body fluid discharge portion. Are formed, and the front and rear edges of the longitudinal embosses 8 and 8 are connected by arc-shaped embosses 8a and 8a that bulge outward from the napkin, respectively, so that the overall oblong shape is closed in the circumferential direction. Is formed. The vertical embosses 8 and 8 may be curved lines that bulge outward or inward in the width direction in addition to the straight line as shown in the figure, and the front and rear end portions are not connected by the arc-shaped emboss 8a on the left and right sides. It is also possible to provide it independently.

[About absorber 4]
In the sanitary napkin 1, the absorbent body 4 includes a pair of left and right first barriers 10 projecting toward the skin side substantially along the longitudinal direction on the skin surface side of the absorbent body 4A formed in a planar shape, A pair of left and right second barriers 11 projecting to the skin side along the side edges of the absorber 4 are provided outside the first barrier 10, and in the middle of the first barrier 10 and the second barrier 11. An embossed groove 12 is formed along the substantially longitudinal direction.

  The first barrier 10 and the second barrier 11 are preferably constructed by joining the absorber body 4A and a separate absorber because the shape, basis weight, texture, etc. of the barrier can be arbitrarily adjusted. As described above, the absorbent body 4A may be integrated with the pulp pile. More preferably, the first barrier 10 and the second barrier 11 are configured by folding a sheet-shaped (or strip-shaped) absorbent body in the width direction and bonded to the skin surface side of the absorbent body 4A. As the sheet-like absorbent body, it is preferable to use the same airlaid pulp nonwoven fabric as that of the absorbent body 4A, but a material made of a material different from the absorbent body 4A, such as a pulp nonwoven fabric or a piled pulp obtained by other manufacturing methods, is used. It is also possible. When the air-laid pulp nonwoven fabric is the same as the absorbent body 4A, the air-laid is folded at a predetermined width in the width direction, and the folded air-laids are bonded to each other with a hot-melt adhesive or the like, and the surface side of the absorbent body 4A It adheres to a predetermined position by a hot melt adhesive or the like. Accordingly, the thickness and basis weight of the first barrier 10 and the second barrier 11 can be freely selected, the processing can be simplified, and the material cost can be reduced by sharing the material.

  The second barrier 11 is preferably provided so as to protrude higher on the skin side than the first barrier 10. That is, when the first barrier 10 and the second barrier 11 are formed by folding airlaid, it is preferable that the second barrier 11 be folded more times than the first barrier 10. In the illustrated example, the first barrier 10 is folded in half and the second barrier 11 is folded in three. As a result, even when a large amount of body fluid that flows out beyond the first barrier 10 is discharged, the second barrier 11 protruding higher than this can be dammed, so that side leakage can be reliably prevented. It becomes like this. In addition, with respect to the body line that curves with the central portion in the width direction as the apex, the outer side in the width direction protrudes relatively high, thereby improving the adhesion with the skin and preventing side leakage reliably.

  The first barrier 10 is preferably formed along the outside of the vertical embossing 8. That is, the longitudinal emboss 8 is provided along the inner edge of the first barrier 10. Thereby, the unevenness of the first barrier 10 can be reduced at the time of mounting, the uncomfortable feeling during mounting can be relieved, and the shape retaining property of the first barrier 10 can be maintained. As in the illustrated example, when the vertical embossing 8 is formed in a straight line, the first barrier 10 is also arranged in a straight line. Although not shown, the first barrier 10 is formed when the vertical embossing 8 is formed in a curved line. Is also arranged with a curve along this.

  The second barrier 11 is preferably disposed along the side edge of the absorber 4. Arranging along the side edge of the absorber 4 means not only the case where the absorber 4 is arranged close to the side edge of the absorber body 4A, but also the case where the absorber 4 is arranged near the side edge of the absorber body 4A. Including. This makes it possible to reliably dam body fluid at the side edge of the absorber 4. In the illustrated example, since the side edge of the absorber 4 is formed by a straight line along the longitudinal direction, the second barrier 11 is also arranged by a straight line along this, but the side edge of the absorber 4 swells inward in the width direction. In the case of being formed with a curved line, the second barrier 11 is also arranged with a curved line along this.

  The embossed groove 12 formed between the first barrier 10 and the second barrier 11 is an embossed squeezed from the skin surface side of the absorbent body 4A, and mainly flows over the first barrier 10 and flows outward. It is provided for diffusing body fluid along the embossed groove 12 in the longitudinal direction of the napkin. As shown in FIG. 1, the embossed groove 12 includes a straight section 12a formed by a straight line along the longitudinal direction of the napkin, and inclined sections 12b and 12b that are continuous from both ends and are inclined inward in the width direction. It is desirable to compose Thereby, it becomes easy to guide the body fluid diffused to both ends of the embossed groove 12 to the inner side in the width direction, and side leakage can be surely prevented.

  The first barrier 10 and the second barrier 11 are integrally covered with the liquid-permeable surface sheet 3. That is, the liquid-permeable surface sheet 3 does not individually cover the first barrier 10 and the second barrier 11, but the liquid-permeable surface sheet 3 is interposed between the first barrier 10 and the second barrier 11. It arrange | positions so that the liquid-permeable surface sheet 3 may be spanned between the top part of the 1st barrier 10, and the top part of the 2nd barrier 11 so that a space may be provided between the surfaces of the absorber main body 4A. . As a result, the unevenness of the first barrier 10 and the second barrier 11 is reduced, and the uncomfortable feeling at the time of wearing can be alleviated. Moreover, the liquid-permeable surface sheet 3 integrally covers the first barrier 10 and the second barrier 11, so that the surface area of the liquid-permeable surface sheet 3 is larger than when the first barrier 10 and the second barrier 11 are not provided. Since the movement distance of the body fluid flowing in the width direction through the top sheet 3 is increased, the chance of being absorbed by the absorber 4 during that time increases, so that side leakage can be reduced from this point.

  In the sanitary napkin 1 configured as described above, since the body fluid flowing in the width direction is blocked by the double barriers of the first barrier 10 and the second barrier 11, a thin absorbent body 4A is used. Even when used, side leakage can be reliably prevented. Further, since the embossed groove 12 extending in the longitudinal direction is formed between the first barrier 10 and the second barrier 11, even if the body fluid flows over the first barrier 10 and the body fluid flows out, the body fluid remains in the embossed groove. After being quickly diffused in the longitudinal direction of the napkin along the line 12, it is received in a wide range of the second barrier 11, so that side leakage can be reliably prevented.

  In addition, since two barriers of the first barrier 10 and the second barrier 11 are provided on both sides in the width direction of the absorbent body 4A, the skin contacts the skin in a wider range than that provided with the single barrier. As a result, the discomfort at the time of wearing can be greatly reduced.

  Next, the dimension of each part of the said absorber 4 is demonstrated. Since the sanitary napkin 1 is intended for a thin napkin, the thickness T of the absorbent body 4A is 0.3 to 2.0 mm, preferably 0.5 to 1.0 mm, as shown in FIG. Is good. The width B of the absorbent body 4A is preferably 90 mm or less.

The heights H1 and H2 of the first barrier 10 and the second barrier 11 from the surface of the absorber body 4A are related to the thickness T of the absorber body 4A, and the thickness T of the absorber body 4A: Height H1: Height H2 of the second barrier 11 is preferably 1: 1-3: 1.5-4. In addition, the basis weight of each part is preferably set to the basis weight of the absorbent body 4A: the basis weight of the first barrier 10: the basis weight of the second barrier 11 = 1: 1 to 2: 1.1 to 2. In other words, by increasing the height from the inner first barrier 10 toward the outer second barrier 11, the uncomfortable feeling at the time of wearing is reduced, the feeling of wearing is not impaired, and the leakage of body fluid can be surely prevented. become. In addition, when the absorber body 4A, the first barrier 10, and the second barrier 11 are each formed of airlaid, the basis weight is 50 to 250 g / m ² , preferably 170 to 200 g / m ² , and the same basis weight. Or a different basis weight.

  On the other hand, as shown in FIG. 3, the distance B0 from the outer edge of the vertical embossing 8 to the absorber body 4A side end is 5 to 30 mm, preferably 8 to 20 mm. The width B1 of the barrier 10 and the width B2 of the second barrier 11 are each 2 to 10 mm, preferably 3 to 6 mm, and the distance B3 between the first barrier 10 and the second barrier 11 is 1 to 10 mm, preferably 2 It should be ˜5 mm. In addition, the relative relationship between the widths of the respective parts is determined based on the distance B0 between the outer edge of the vertical embossing 8 and the end of the absorbent body 4A on the basis of B0: B1: B2: B3 = 1: 0.2-0. 4: It is good to set it as 0.2-0.4: 0.1-0.3. By defining the width dimension of each part on the basis of the distance B0 from the outer edge of the vertical embossing 8 to the absorber body 4A side end, the distance between the first barrier 10 and the second barrier 11 in particular is not excessively separated. The surface roughness between the barriers is reduced.

  The width B1 of the first barrier 10 and the width B2 of the second barrier 11 may be the same, but are preferably different. In this case, since the second barrier 11 exists outside the first barrier 10 and when the second barrier 11 is formed relatively high, it is easy to come into contact with the skin. It is preferable to make it relatively larger.

  The distance in the width direction from the outer end of the second barrier 11 to the side edge of the absorbent body 4A is 0 to 10 mm, preferably 0 to 5 mm.

  Subsequently, the length of each part in the longitudinal direction of the napkin will be described. As shown in FIG. 4, the length of each part is longer in the order of the first barrier 10, the straight section 12 a of the embossed groove 12, and the second barrier 11. It is preferable that the lengths at both ends in the direction are gradually increased. That is, the straight section 12 a of the embossed groove 12 is formed longer on both sides in the longitudinal direction than the first barrier 10, and the second barrier 11 is formed on the both sides in the longitudinal direction longer than the straight section 12 a of the embossed groove 12. This makes it possible to effectively dam body fluid that diffuses in the longitudinal direction toward the outside.

  Specifically, the length L1 of the first barrier 10 is 50 to 300 mm, preferably 70 to 95 mm, and the length L2 of the second barrier 11 is 60 to 340 mm, preferably 110 to 140 mm. The length L3 of the straight section 12a of the embossed groove 12 is 50 to 320 mm, preferably 100 to 130 mm. The relative relationship of each part is based on the longitudinal dimension L of the sanitary napkin 1 (see FIG. 1). L: L1: L3: L2 = 1: 0.35-0.75: 0.40-0 .8: 0.45 to 0.85 is preferable.

  The length L4 in the napkin longitudinal direction of the inclined section 12b of the embossed groove 12 is 1 to 30 mm, preferably 10 to 25 mm. The tip of the inclined section 12b may be positioned outside the second barrier 11 in the longitudinal direction of the napkin as shown in the illustrated example, or may be positioned within the range of the second barrier 11.

  By the way, in this sanitary napkin 1, when the napkin is folded in the longitudinal direction along the widthwise fold line S during individual packaging, a large number of wrinkles are generated due to the bulkiness of the first barrier 10 and the second barrier 11; There is a case where a crease remains at the time of wearing and the function as a barrier is not sufficiently exhibited. Therefore, as shown in FIG. 5, it is preferable to provide cuts 13 along the substantially width direction at least at positions where the first barrier 10 and the second barrier 11 overlap the folding line S in the width direction.

  The notch 13 may be formed in a straight line, and may be formed in parallel with the napkin width direction (in parallel with the width direction fold line S), or the center side in the napkin longitudinal direction (FIG. 5A) or napkin. You may incline toward the outer side (FIG. 5 (B)) of a longitudinal direction. It is preferable to incline toward the center in the longitudinal direction because it is easier to draw body fluids inward than to incline outward in the longitudinal direction. It is preferable that a plurality of the notches 13 are provided at intervals along the first barrier 10 or the second barrier 11.

  As shown in FIG. 5, the cut 13 is not provided over the entire width of the first barrier 10 and the second barrier 11, but is provided in a predetermined range inside the width direction leaving a non-cut range outside the width direction. It is preferable. If a cut is provided over the entire width, the barrier may be divided at the time of mounting, and there is a risk of leakage from there. The width at which the notch 13 is provided is the width of the notch 13: B1: B2 = 0.1 to 0.8: 0.4 to 1: 1 with respect to the width B1 of the first barrier 10 and the width B2 of the second barrier 11. It is good to do. The specific length of the cut 13 is 1 to 6 mm, preferably 1.5 to 4 mm.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Liquid-impermeable back sheet, 3 ... Liquid-permeable surface sheet, 4 ... Absorber, 4A ... Absorber main body, 6 ... Second sheet, 7 ... Side nonwoven fabric, 8 ... Longitudinal embossing, 10 ... 1st barrier, 11 ... 2nd barrier, 12 ... Embossed groove, 13 ... Notch

Claims (5)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet,
The absorbent body has a pair of left and right first barriers that protrude toward the skin side along a substantially longitudinal direction on the skin surface side of the absorbent body that is formed in a planar shape, and is outside the first barrier and absorbs the absorbent body. A pair of left and right second barriers projecting to the skin side along the side edges of the body are provided, and each of the first barrier and the second barrier is intermediate between the first barrier and the second barrier, and is substantially longitudinal on the skin surface side of the absorbent body. Embossed grooves along the direction are formed,
Each of the first barrier and the second barrier is configured by folding a sheet-like absorber separate from the absorber main body in the width direction, and the second barrier is closer to the skin than the first barrier. Protruding high,
The liquid-permeable surface sheet is disposed between the liquid-permeable surface sheet and the absorber surface between the first barrier and the second barrier so as to integrally cover the first barrier and the second barrier. An absorptive article characterized by being arranged so that space may be provided.   The absorptive article according to claim 1 in which said absorber consists of airlaid pulp nonwoven fabric.   A pair of left and right longitudinal embosses along the substantially longitudinal direction is formed on the liquid-permeable surface sheet surface side, and the first barrier is formed along the outside of the longitudinal emboss. Absorbent article as described in 1. The embossed groove includes a straight section which is formed in a straight line along the longitudinal direction, with continuous from both ends, to claim 1-3 or which is composed of an inclined section that inclines toward the inner side in the width direction, respectively The absorbent article as described. The absorbent article is folded in the longitudinal direction at the folding line in the width direction when individually packaged,
The absorbent article according to any one of claims 1 to 4 , wherein each of the first barrier and the second barrier is provided with a cut substantially along the width direction in a region overlapping the width-direction fold line.

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