JP2010136917A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article for obtaining excellent leak preventing property by effectively preventing the backward flow and leak of menstrual blood and the flow and leak of a body fluid from a back part. <P>SOLUTION: A sanitary pad 1 includes: an absorbent body 5 having a front surface sheet 2, a back surface sheet 3, and an absorbent body 4 interposed between the both sheets 2, 3; and a pair of leak preventing walls 7 arranged on both sides 5c in the longitudinal direction (a Y-direction) of the absorbent body 5, which have a pair of base walls 71 and surface shape elastic expansible parts 72 successively arranged from the upper ends 71a of the base walls respectively. The absorbent body 4 has a swelling high center part 40 at the center region CT in the width direction (an X-direction). The high center part 40 includes individually arranged front high center part 41 and back high center part 42. The front high center part 41 is formed in an excretion region (a). A pair of intermediate fixing parts 7c are arranged on the outside in the width direction of a region with the back high center part 42 arranged therein. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a sanitary napkin, a panty liner (cage sheet), and an incontinence pad.

In recent years, especially in night sanitary napkins, the length of sanitary napkins tends to increase in order to prevent menstrual blood from traveling backward through the wearer's skin and causing so-called transmission leakage. It is in.
Moreover, in order to improve the adhesiveness of a wearer's skin and the sanitary napkin, and to prevent a leak, it is known to form a middle-high part in an absorber. For example, Patent Literature 1 discloses a sanitary napkin in which an absorber is provided with middle and high portions narrower than the width of the absorber at the front portion and the rear portion.

  However, since the length of the sanitary napkin for night use is very long, even in the sanitary napkin described in Patent Document 1, a space may be generated between the wearer's skin and the sanitary napkin in the rear part. There was a risk of menstrual blood leaking from the space.

JP 2006-239162 A

  Accordingly, an object of the present invention is to provide an absorbent article that can effectively prevent the flow of menstrual blood from the rear and the leakage of body fluid from the rear, and can obtain excellent leakage prevention properties. .

  The present invention relates to an absorbent main body having a surface sheet on the skin contact surface side, a back sheet on the non-skin contact surface side, and an absorbent body interposed between both sheets, and a pair of the absorbent body on both longitudinal sides of the absorbent body. And a pair of leak-proof walls each having a planar elastic stretchable portion connected to the upper end of the base wall portion, and the planar elastic stretchable portion is in the stretched state to absorb the absorption. The absorbent article is fixed between the front and rear end portions of the adhesive main body and the front and rear end portions, and is curved in the natural state before and after the intermediate fixing portion between the front and rear end portions. The middle region has a raised middle portion on the surface sheet side, and the middle high portion includes a front middle high portion and a rear middle high portion, and the front middle high portion is excreted against the body fluid excretion portion of the wearer. The pair of intermediate fixing portions are formed outside the width direction of the region where the rear middle high portion is disposed. Is obtained by achieving the above object by providing an absorbent article is arranged.

  According to the absorbent article of the present invention, it is possible to effectively prevent the menstrual blood flow from the rear and the body fluid from leaking from the rear, and an excellent leak-proof property can be obtained.

  Hereinafter, preferable embodiment of the sanitary napkin which is an absorbent article of this invention is described based on FIGS. 1-4.

As shown in FIG. 1, the absorbent article (sanitary napkin) 1 of this embodiment is formed symmetrically with respect to a center line CL extending in the longitudinal direction of the sanitary napkin 1.
The sanitary napkin 1 according to the present embodiment includes a top sheet 2 formed on the skin contact surface side, a back sheet 3 formed on the non-skin contact surface side, and both sheets 2 as shown in FIGS. , 3 having an absorbent main body 5 having an absorbent body 4 interposed therebetween. 1 to 3, the sanitary napkin 1 has a longitudinal direction of the absorbent main body 5 (hereinafter referred to as “Y direction. Y direction; a direction parallel to the center line CL)” on both sides 5c. 5c includes a pair of leak-proof walls 7 and 7 each having a pair of base wall portions 71 and planar elastic stretchable portions 72 connected to the upper end portions 71a of the sanitary napkin 1. The planar elastic expansion / contraction part 72 is fixed between the front and rear end parts 5b and 5d and the front and rear end parts 5b and 5d of the absorbent main body 5 in an extended state, so that the front and rear end parts 5b and 5d are in a natural state. Is curved before and after the intermediate fixing portion 7c.

  Here, the “excretion part region a” is usually the longitudinal direction of the absorbent article (the sanitary napkin 1) in the absorbent article having the wing part 31 like the sanitary napkin 1 of the present embodiment ( This is a region having the wing portion 31 in the Y direction). The excretion part region a in the absorbent article that does not have the wing part 31 refers to two fold lines perpendicular to the product longitudinal direction (Y direction) generated when the sanitary napkin is folded into an individual packaging form. A region that is the same as or narrower than the region surrounded by the first fold line and the second fold line, counted from the front end in the longitudinal direction (Y direction). In addition, when the product length of the sanitary napkin is long and three fold lines are generated, the region surrounded by the first fold line and the second fold line or the longitudinal direction of the product is counted from the front end in the longitudinal direction (Y direction) of the product. A region that is the same as or narrower than the region surrounded by the first fold line and the third fold line is counted from the front end.

  The sanitary napkin 1 according to the present embodiment will be described in detail. As shown in FIG. 1, the sanitary napkin 1 includes a front region b in front of the central portion c and a rear region d in the rear of the central portion c. Yes. As shown in FIG. 1, the sanitary napkin 1 includes an excretion part area a (an area having a wing part 31) in contact with the body fluid excretion part of the wearer in the front area b.

  As shown in FIGS. 1 to 3, the sanitary napkin 1 includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and an absorber 4. Each of the top sheet 2 and the back sheet 3 has a larger outer diameter than the absorber 4. The top sheet 2 and the back sheet 3 extend from both ends in the longitudinal direction (Y direction) of the absorbent body 4 at both ends in the longitudinal direction (Y direction) of the sanitary napkin 1, and the extending portions are heat-sealed with each other. Further, the top sheet 2 is folded back so as to wrap the absorbent body 4 at both side portions in the longitudinal direction (Y direction) of the absorbent body 4 and is joined to the back sheet 3 by heat sealing or the like. Is forming. As shown in FIGS. 1 to 3, the sanitary napkin 1 includes a pair of embossed grooves 8 that fix the top sheet 2 and the absorbent body 4. As shown in FIG. 1, a pair of wing portions 31 of the sanitary napkin 1 are provided on both side portions in the longitudinal direction (Y direction) of the sanitary napkin 1. The wing part 31 is formed by extending the back sheet 3, and an adhesive part (not shown) for fixing the wing part 31 to the non-skin contact surface of the crotch part of the shorts is formed on the back surface. ) Is provided.

  As shown in FIGS. 1 to 3, the sanitary napkin 1 has leak-proof walls (gathers) 7 on both side portions 5 c and 5 c in the longitudinal direction (Y direction) of the absorbent main body 5. The leak-proof wall (gather) 7 of the sanitary napkin 1 is a so-called T-shaped leak-proof wall (gather), and as shown in FIG. 1 and FIG. 2, in the longitudinal direction (Y direction) of the absorbent main body 5. Each of the side portions 5c and 5c has a pair of standing base wall portions 71 and planar elastic stretchable portions 72 connected to the upper end portions 71a. Here, “standing” means a state in which the upper end 71 a of the leak-proof wall 7 is positioned above the surface of the topsheet 2. In the following description, the right leakage barrier 7 shown in FIG. 1 will be mainly described.

  As shown in FIG. 2, the T-shaped leak-proof wall 7 is formed by processing one strip-shaped sheet 6 into a sleeve shape and a T-shape. The belt-like stretchable sheet 6 is disposed and fixed along the longitudinal direction on the side portion 5c of the absorbent main body 5 in the longitudinal direction (CL line direction). A T-shaped leak-proof wall 7 standing on the side is formed. The T-shaped leak-proof wall 7 includes a base wall portion 71, and the base wall portion 71 has an upper end portion 71a and a fixed end portion 71b in a free state.

  As shown in FIG. 1, the belt-like sheet 6 has a front end portion in the longitudinal direction (Y direction) of the front region b of the sanitary napkin 1 and a rear end portion in the longitudinal direction (Y direction) of the rear region d. Similar to the top sheet 2 and the back sheet 3, it extends from both ends in the longitudinal direction (Y direction) of the absorber 4, and the extending part is bonded and fixed by heat sealing or hot melt. The joined and fixed portions are the front end portion 7b in the longitudinal direction (Y direction) of the leak-proof wall 7 and the rear end portion 7d in the longitudinal direction (Y direction). The leak-proof wall 7 has an intermediate fixing part 7 c fixed on the top sheet 2. The intermediate fixing portion 7c of the leakage preventing wall 7 is disposed between the front end portion 7b and the rear end portion 7d.

  As shown in FIGS. 1 and 2, the T-shaped leak-proof wall 7 includes a planar elastic expansion / contraction portion 72 that protrudes from the upper end portion 71 a in a substantially horizontal direction. In the state where the sanitary napkin 1 is attached, the upper surface of the elastic stretchable portion 72 comes into contact with the skin of the wearer. The planar elastic stretchable portion 72 is fixed at three positions between the front and rear end portions 5b and 5d and the front and rear end portions 5b and 5d of the absorbent main body 5 in an extended state. As the elastic stretchable portion 72 is fixed in this manner, the sanitary napkin 1 is curved before and after the intermediate fixing portion 7c between the front and rear end portions 5b and 5d in a natural state. As shown in FIG. 2, the inner side and the outer side of the sanitary napkin 1 are arranged in the width direction of the elastic stretchable portion 72 (hereinafter referred to as “X direction”. X direction; direction perpendicular to the center line CL). It is comprised from the inner overhang | projection part 721 and the outward overhang | projection part 722 which protrude in the width direction (X direction) to the inward and outward respectively by the comparable extent. The inwardly projecting part 721 and the outwardly projecting part 722 of the elastic expansion / contraction part 72 are so-called free ends, and extend over substantially the entire longitudinal direction (Y direction) of the sanitary napkin 1. As shown in FIG. 1, the elastic expansion / contraction part 72 of the leak-proof wall 7 of this embodiment is longer than the intermediate | middle fixing | fixed part 7c in the longitudinal direction (Y direction) front elastic expansion / contraction part 72b ahead and the intermediate | middle fixing | fixed part 7c (Y direction) Direction) a rear elastic expansion / contraction part 72d.

  In the intermediate fixing part 7c of the leak-proof wall 7 in the present embodiment, as shown in FIG. 3, the surface sheet 2 is interposed via the base wall part 71 in which the inwardly projecting part 721 of the planar elastic stretchable part 72 is folded. Fixed indirectly on the top. As shown in FIG. 3, the leak-proof wall 7 has an outward projecting portion 722 that projects outward in the width direction (X direction) of the elastic stretchable portion 72 at the intermediate fixing portion 7 c.

  As shown in FIG. 2, a plurality of thread-like elastic members 63 extending in the longitudinal direction (Y direction) of the leak-proof wall 7 are respectively provided on the inwardly projecting part 721 and the outwardly projecting part 722 of the elastic stretchable part 72. In a stretched state, the sheet 6 is arranged with an interval in the width direction (X direction), and the sheet 6 is given elasticity. The plurality of elastic members 63 arranged in both the inwardly projecting part 721 and the outwardly projecting part 722 are two in total, including the inwardly projecting part 721 and the outwardly projecting part 722 in one leak-proof wall 7. 10 is preferable. The elastic member 63 is not disposed in front of the front region b and behind the rear region d, and the belt-like sheet 6 does not have stretchability. The leak-proof wall 7 does not stand up in the region where the sheet 6 does not have elasticity or the region where the elastic member 63 is disposed even when the elastic member 63 is disposed.

  As shown in FIG. 3, the leak-proof wall 7 in the present embodiment has a plurality of elastic members 63 arranged in the intermediate fixing portion 7c inward in the width direction (X direction) of the elastic stretchable portion 72. However, in the intermediate fixing portion 7c, the inwardly protruding portion 721 of the elastic stretchable portion 72 is fixed on the top sheet 2, so that the width direction (X direction) of the intermediate fixing portion 7c of the leak-proof wall 7 is fixed. ) The inside is not standing. However, as shown in FIG. 3, the leak-proof wall 7 in the present embodiment has an outward projecting portion 722 that is a free end also in the intermediate fixing portion 7 c, and the intermediate fixing portion 7 c is also outward. The portion of the overhang portion 722 expands and contracts in the longitudinal direction (Y direction). Therefore, the outward projecting portion 722 is formed to be inclined so as to gradually rise outward in the width direction (X direction).

  As shown in FIG. 2, the fixed end portion 71 b of the T-shaped leak-proof wall 7 is provided over an inward position at a predetermined distance from the side edge of the absorbent main body 5. Specifically, the fixed end portion 71b of the T-shaped leak-proof wall 7 is disposed between the top sheet 2 and the back sheet 3 extending to the non-skin contact surface side of the absorber 4, and is heat-sealed. Or by an adhesive or the like. The sanitary napkin 1 is joined by an adhesive.

  The absorbent body 4 of the sanitary napkin 1, as shown in FIGS. 1 to 3, is disposed on the back sheet 3 and extends from the front area b to the rear area d, and the absorbent main body. 5 has a mid-high portion 40 that protrudes toward the topsheet 2 side in the width direction (X direction) central region (CT) of the lower layer absorbent body 43, and the mid-high portion 40 includes a front mid-high portion 41 and a separately provided front mid-high portion 41 and It is formed from the rear middle high part 42. The front middle-high part 41 is formed in the excretion part area | region a, as shown in FIG. Specifically, as shown in FIGS. 2 and 3, the absorbent body 4 is the upper surface of the lower layer absorbent body 43, and the skin of the lower layer absorbent body 43 in the excretory region a and the rear region d of the sanitary napkin 1. On the contact surface side, there are a front middle high portion 41 and a rear middle high portion 42 that are narrower than the lower layer absorber 43 and protrude in a convex shape on the top sheet 2 side.

  The front middle high portion 41 is narrower than the lower layer absorber 43 and is formed longer in the longitudinal direction (Y direction). As shown in FIGS. 1 and 2, the width direction (X direction) of the lower layer absorber 43 is used. ) It is a central region (CT), and extends in the longitudinal direction (Y direction) front and rear ends of the wing portion 31. The front middle-high portion 41 has a front end portion 41 a and a rear end portion 41 b in the longitudinal direction (Y direction) of the front middle-high portion 41 in the plan view of the sanitary napkin 1. ) It is convex outward. The length of the front middle high portion 41 in the width direction (X direction) at the front end portion 41a is substantially the same as the length of the front middle high portion 41 in the width direction (X direction) at the rear end portion 41b. The curved radius of the convex shape of the end portion 41 b is formed to be substantially the same as the curved radius of the convex shape of the front end portion 41 a of the front middle-high portion 41. As shown in FIG. 1, the front middle high portion 41 is surrounded by a pair of outer grooves 81 and an intermediate groove 82 described later.

  As shown in FIG. 1, the front middle-high portion 41 of the present embodiment is formed such that the rear end portion 41 b is positioned forward in the longitudinal direction (Y direction) from the intermediate fixing portions 7 c and 7 c of the pair of leak-proof walls 7. ing. As shown in FIG. 1, the front middle high portion 41 of the present embodiment has a front end portion 41 a positioned between the front end portions 7 b and 7 b of the pair of leak-proof walls 7 in the vicinity of the rear end in the longitudinal direction (Y direction). Is formed.

  The rear middle high portion 42 is narrower than the lower layer absorber 43 and is formed longer in the longitudinal direction (Y direction). As shown in FIGS. 1 and 3, the width direction (X direction) of the lower layer absorber 43 is used. ) Central region (CT), which is formed behind the intermediate groove 82 in the longitudinal direction (Y direction) of the sanitary napkin 1. In the plan view of the sanitary napkin 1, the rear middle high portion 42 has a rear end portion 42b of the rear middle high portion 42 (the one farther from the intermediate groove 82), and a front end portion 42a of the rear middle high portion 42, as shown in FIG. It is formed in a more tapered shape. Specifically, as shown in FIG. 1, the front end portion 42a and the rear end portion 42b in the longitudinal direction (Y direction) of the rear middle high portion 42 are both outward in the longitudinal direction (Y direction) of the sanitary napkin 1A. The curved radius of the convex shape of the rear end 42b of the rear middle high part 42 far from the intermediate groove 82 is the convex shape of the front end 42a of the rear middle high part 42 close to the intermediate groove 82. The rear middle-high portion 42 is formed so that the width gradually decreases toward the rear end portion 42b. As shown in FIG. 1, the rear middle high portion 42 is surrounded by a pair of rear intermediate outer grooves 83 and an intermediate groove 82 described later.

  As shown in FIG. 1, the rear middle-high portion 42 extends between the intermediate fixing portions 7 c and 7 c of the pair of leak-proof walls 7. In other words, the intermediate fixing portions 7c, 7c of the pair of leak-proof walls 7 are disposed outward in the width direction (X direction) of the region where the rear middle high portion 42 is disposed. As described above, the rear middle-high portion 42 is formed to extend in the longitudinal direction (Y direction) in the front-rear direction so as to intersect with an imaginary line connecting the intermediate fixing portions 7c, 7c of the pair of leak-proof walls 7. As shown in FIG. 1, the rear middle-high part 42 of the present embodiment is formed such that the rear end part 42 b is positioned in front of the rear end part 7 d of the rear elastic expansion / contraction part 72 d in the pair of leak-proof walls 7. . As described above, the rear end portion 42 b of the rear middle high portion 42 is formed between the rear elastic stretchable portions 72 d of the pair of leak-proof walls 7.

  As shown in FIGS. 1 to 3, the sanitary napkin 1 includes a pair of embossed grooves 8 that fix the top sheet 2 and the absorbent body 4. The embossed groove 8 extends along both side portions 5c, 5c of the absorbent main body 5. In the embossed groove 8, deeply formed portions and portions formed slightly shallower than that are alternately arranged to form a continuous line. As shown in FIG. 1, the embossed groove 8 of the present embodiment is provided along the outer periphery of the front middle-high portion 41 and includes an outer groove 81 formed by compacting the topsheet 2 and the absorber 4. . Further, as shown in FIG. 1, the embossed groove 8 of the present embodiment is an intermediate groove 82 formed by compacting the topsheet 2 and the absorbent body 4 between the front middle high portion 41 and the rear middle high portion 42. It has. In addition, as shown in FIG. 1, the embossed groove 8 of the present embodiment includes a rear intermediate groove 83 formed by consolidating the topsheet 2 and the absorber 4 at the rear end portion 42 b of the rear middle high portion 42. ing. Further, as shown in FIG. 1, the embossed groove 8 of the present embodiment is formed by consolidating the topsheet 2 and the absorber 4 between the rear end portions 7d, 7d of the pair of leak-proof walls 7, 7. The rearmost intermediate groove 84 is provided. A pair of embossed grooves 8 are provided symmetrically with respect to a center line (CL line) extending in the longitudinal direction of the sanitary napkin 1, and in the sanitary napkin 1 of the present embodiment, an outer portion formed in the excretory region a is formed. The groove 81 and the rearward end portions 7d of the pair of leak-proof walls 7 and 7 are connected to the rearmost intermediate groove 84 to form a ring-shaped circumferential groove.

  As shown in FIG. 1, the intermediate groove 82 of the embossed groove 8 in the present embodiment is disposed in the central portion C in the longitudinal direction (Y direction) of the sanitary napkin 1 and extends in the width direction (X direction). Is formed. As shown in FIG. 1, the intermediate groove 82 is formed in a convex shape toward the rear intermediate groove 42. The curve radius of the convex shape of the intermediate groove 82 is substantially the same as the curve radius of the convex shape of the rear end portion 41b of the front middle high portion 41, or is larger than the curve radius of the convex shape of the rear end portion 41b. Is formed. As shown in FIG. 1, the intermediate groove 82 in the present embodiment is not connected to the outer groove 81, but may be connected.

  As shown in FIG. 1, the rear intermediate groove 83 of the embossed groove 8 in the present embodiment is formed along the rear end portion 42 b of the rear middle high portion 42, and in the longitudinal direction (Y direction) of the rear middle high portion 42. It is formed along both side portions 42c, 42c. As shown in FIG. 1, the rear intermediate groove 83 is formed in a convex shape toward the rear in the longitudinal direction (Y direction) of the sanitary napkin 1. The curved radius of the convex shape of the rear intermediate groove 83 is formed to be substantially the same as the curved radius of the convex shape of the rear end portion 42 b of the rear middle high portion 42. As shown in FIG. 1, the rear intermediate groove 83 in the present embodiment is not connected to other embossed grooves 8, but may be connected.

  As shown in FIG. 1, the rearmost intermediate groove 84 of the embossed groove 8 in the present embodiment is formed in a convex shape outward in the longitudinal direction, and both side portions 5 c in the longitudinal direction (Y direction) of the absorbent main body 5. , 5c. The curve radius of the convex shape of the rearmost intermediate groove 84 in this embodiment is larger than the curve radius of the convex shape of the intermediate groove 82 and smaller than the curve radius of the convex shape of the rear intermediate groove 83. Has been. The widths of the outer groove 81, the intermediate groove 82, the rear intermediate groove 83, and the rearmost intermediate groove 84 are respectively 15 mm to 200 mm, preferably 20 mm to 150 mm. The groove widths of the outer groove 81, the intermediate groove 82, the rear intermediate groove 83, and the rearmost intermediate groove 84 are 1.5 mm to 6 mm, respectively.

  As shown in FIG. 1, each of the intermediate fixing portions 7 c, 7 c of the pair of leak-proof walls 7, 7 of the present embodiment is formed rearward in the longitudinal direction (Y direction) than the intermediate groove 82 of the embossed groove 8. . Thus, the intermediate groove 82 is formed between the front elastic expansion / contraction portions 72 b of the pair of leak-proof walls 7. As shown in FIG. 1, each of the rear end portions 7 d and 7 d of the pair of leak-proof walls 7 and 7 of the present embodiment extends rearward in the longitudinal direction (Y direction) from the rear intermediate groove 83 of the embossed groove 8. It is fixed on the top sheet 2. Thus, the rear intermediate groove 83 is formed between the rear elastic expansion / contraction portions 72d of the pair of leak-proof walls 7.

  The back region d of the absorbent main body 5 of the sanitary napkin 1 of the present embodiment is formed to extend to the wearer's tail ribs, and the back sheet 3 is, as shown in FIG. A rear flap 32 that greatly extends in the width direction (X direction) from both side edges 5a, 5a in the longitudinal direction of the absorbent main body 5 and is adhesively fixed on the inner surface (skin facing surface) of an underwear such as shorts when worn. Is forming.

A material for forming the sanitary napkin 1 of the present embodiment will be described.
As the lower layer absorbent body 43 of the top sheet 2, the back sheet 3 and the absorbent body 4, any material can be used without particular limitation as long as it is usually used for absorbent articles such as sanitary napkins. For example, a liquid-permeable nonwoven fabric, an apertured film, or a laminate of these can be used as the top sheet 2, and a resin film or a laminate of a resin film and a nonwoven fabric can be used as the back sheet 3. Can do. As the lower layer absorbent body 43, a fiber aggregate of fiber materials such as pulp or a material in which a superabsorbent polymer is supported is wrapped with a covering material such as tissue paper or a water-permeable nonwoven fabric. be able to.

  Examples of the front middle high portion 41 and the rear middle high portion 42 include natural fibers such as pulp and cotton, synthetic fibers other than natural fibers, and fibers obtained by mixing them, and are composed of pulp fibers from the viewpoint of absorbability. Preferably it is. From the viewpoint of fit properties, it is preferable that synthetic fibers are included. Here, specifically, synthetic fibers include single fibers formed from resins such as polyethylene, polypropylene, polyester and polylactic acid, various composite fibers such as core-sheath structure fibers, and semi-synthetic fibers such as rayon. It is.

  Examples of the sheet 6 forming the leak-proof wall 7 include a film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof, and preferably has stretchability partially or entirely. Specifically, the material itself made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene-α olefin copolymer such as ethyl acrylate-ethylene, etc. has a stretchable material. (Film, thread-like material, nonwoven fabric, woven fabric) and composite sheets of these stretchable materials (elastic member 63) and thermoplastic nonwoven fabric made of polyethylene / polyester, polyethylene / polypropylene, polypropylene, and the like. Examples of the shape of the thread-like elastic member 63 include a thread-like (thread rubber etc.) or string-like (flat rubber etc.) cross section having a rectangular, square, circular, polygonal cross section, or a multifilament type thread-like one. It is done.

  Examples of the processing method for forming the embossed grooves 8 such as the outer groove 81, the intermediate groove 82, the rear intermediate 83, and the rearmost intermediate groove 84 include embossing, heat embossing, ultrasonic embossing, and combinations of these. It is done.

Next, the effect at the time of using the sanitary napkin 1 of embodiment of this invention mentioned above is demonstrated.
The sanitary napkin 1 of the present embodiment is provided with the intermediate fixing portion 7c, so that two curved shapes are provided between the intermediate fixing portion 7c and the front end portion 7b and between the intermediate fixing portion 7c and the rear end portion 7d. Can be presented. In the case of the present invention, the middle / high portion 40 is divided into a front middle / high portion 41 and a rear middle / high portion 42, and the rigidity between the front / rear middle / high portions 41, 42 is weaker than the front / rear middle / high portions 41, 42. Therefore, when the sanitary napkin 1 is bent back and forth, the sanitary napkin 1 is easily bent between the front and rear middle and high portions 41 and 42 having relatively lower rigidity than the front and rear middle and high portions 41 and 42. Here, when the contraction force of the elastic member 63 of the leak-proof wall 7 is increased, it may be buckled, but the intermediate fixing portion 7c is formed in a region where the rear middle-high portion 42 is present, and the front-rear middle-high portions 41, 42 are formed. By not forming in the region between the two, it is possible to obtain a curved shape without buckling between the front, rear, middle and high portions 41, 42, and to attach the body forward of the intermediate fixing portion 7c and rearward of the intermediate fixing portion 7c. Two curved shapes according to the part shape can be obtained. In particular, when the region between the front, rear, middle, and high portions 41 and 42 is worn when the body line of the buttocks near the tailbone of the wearer changes suddenly, the item is applied with a sharp curve in such a region. In other words, there is a possibility that liquid leakage may occur from such a part without buckling and forming a gap and fitting well. However, the sanitary napkin 1 can be bent so as not to buckle.

  Moreover, as for the sanitary napkin 1 of this embodiment, as shown in FIGS. 1-3, the absorber 4 has the middle-high part 40 which consists of the front middle-high part 41 and the back middle-high part 42. As shown in FIG. As shown in FIG. 1, the rear middle-high portion 42 extends between the intermediate fixing portions 7 c and 7 c of the pair of leak-proof walls 7. Therefore, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 4, the rear middle-high part 42 is easily bent inward due to the contraction of the pair of leak-proof walls 7, and the longitudinal direction of the menstrual blood of the wearer ( (Y direction) The backward flow can be prevented, and the body fluid leakage from the rear can be effectively prevented. Thus, the sanitary napkin 1 of the present embodiment can obtain excellent leakage prevention properties.

  Moreover, as for the sanitary napkin 1 of this embodiment, as shown in FIG. 1, the back end part 41b of the front middle-high part 41 is longitudinal direction (Y direction) front rather than the intermediate | middle fixing | fixed part 7c, 7c of a pair of leak-proof walls 7. It is formed in the position. Thus, since the back end part 41b of the front middle high part 41 is located between the front elastic expansion-contraction parts 72b and 72b of a pair of leak-proof walls 7, the front middle high part 41 on the absorber 4 was arranged. Due to the difference in rigidity between the part and the part that is not arranged, and the contraction force of the front elastic expansion / contraction part 72b of the pair of leak-proof walls 7, the front middle / high part 41 is easily bent inward from the rear end part 41b. Similarly, the rear end part 42b of the rear middle high part 42 is formed in front of the rear end part 7d of the pair of leakage prevention walls 7, and the rear end part 42b of the rear middle high part 42 is formed of a pair of leakage prevention parts. It is formed between the rear elastic expansion / contraction part 72d of the wall 7. Therefore, due to the difference in rigidity between the portion where the rear middle high portion 42 is disposed on the absorber 4 and the portion where the rear middle high portion 42 is not disposed, and the contraction force of the rear elastic expansion / contraction portion 72d of the pair of leak-proof walls 7, It is easy to bend inward from the rear end 42b. Therefore, the flow of the wearer's menstrual blood in the longitudinal direction (Y direction) can be further prevented, and body fluid from the rear can be more effectively prevented from leaking.

  In the sanitary napkin 1 of this embodiment, as shown in FIG. 1, the intermediate fixing portions 7 c and 7 c of the pair of leak-proof walls 7 and 7 are longer than the intermediate groove 82 of the embossed groove 8 (Y Direction) is formed at the rear. Thus, the intermediate groove 82 is formed between the front elastic expansion / contraction portions 72 b of the pair of leak-proof walls 7. Therefore, as shown in FIG. 4, the sanitary napkin 1 of the present embodiment is easily bent inward with the intermediate groove 82 as a flexible shaft. Similarly, each of the rear end portions 7d and 7d of the pair of leak-proof walls 7 and 7 extends rearward in the longitudinal direction (Y direction) from the rear intermediate groove 83 of the embossed groove 8 as shown in FIG. Yes. Thus, the rear intermediate groove 83 is formed between the rear elastic expansion / contraction portions 72d of the pair of leak-proof walls 7. Therefore, as shown in FIG. 4, the sanitary napkin 1 of this embodiment is easily bent inward with the rear intermediate groove 83 as a flexible shaft. Accordingly, the flow of the menstrual blood of the wearer in the longitudinal direction (Y direction) can be further prevented, and body fluid from the rear can be effectively prevented from leaking.

  Moreover, the sanitary napkin 1 of this embodiment is provided with the rearmost intermediate groove 84 formed in a convex shape outward in the longitudinal direction, as shown in FIG. Therefore, it is possible to more effectively prevent body fluid from leaking from the rear.

  Further, as shown in FIG. 3, the leak-proof wall 7 of the sanitary napkin 1 of the present embodiment is such that the outwardly protruding portion 722 of the intermediate fixing portion 7 c is gradually outward in the width direction (X direction). It is formed to be inclined so as to stand up. Therefore, also in the intermediate fixing part 7c, it is possible to effectively prevent body fluid from leaking in the width direction (X direction), and the sanitary napkin 1 of the present embodiment can obtain excellent leakage prevention properties.

  Moreover, as for the sanitary napkin 1 of this embodiment, as shown in FIG. 1, the rear part 42b of the back middle high part 42 has a tapered shape. Thus, by forming the back middle high part 42, it is easy to enter the crack of a wearer's buttocks, and the flow of menstrual blood to the back can be prevented.

  The absorbent article of this invention is not restrict | limited to the disposable diaper of this embodiment mentioned above at all, and can be changed suitably.

  For example, in the sanitary napkin 1 of the above-described embodiment, as shown in FIG. 1, the middle / high portion 40 is formed of two middle / high portions, that is, a front middle / high portion 41 and a rear middle / high portion 42. You may form from the above middle-high part.

  Further, in the sanitary napkin 1 of the above-described embodiment, the inward projecting portion 721 of the planar elastic stretchable portion 72 is folded at the intermediate fixing portion 7c at the base wall portion 71 as shown in FIG. However, it may be directly fixed to the top sheet 2.

  Moreover, in the sanitary napkin 1 of the above-described embodiment, the rear end portion 42b of the rear middle high portion 42 is positioned in front of the rear end portions 7d of the pair of leak-proof walls 7 as shown in FIG. Although formed, it does not have to be positioned forward.

  Moreover, in the sanitary napkin 1 of the above-described embodiment, as shown in FIG. 1, the outer groove 81 arranged along the outer periphery of the front middle high portion 41, the front middle high portion 41, and the rear middle high portion 42. An embossed groove 8 having an intermediate groove 82 formed therebetween and a rearmost intermediate groove 84 formed between the rear end portions 7d and 7d of the pair of leak-proof walls 7 and 7 is provided. The rearmost intermediate groove 84 has a radius of curvature at its tip end portion that is larger than half the maximum width of the rear middle high portion 42, so that a pair of leakage prevention due to the contraction force of the elastic member 63 of the leakage prevention wall 7. The deformation of the absorbent body between the rear ends 7d and 7d of the walls 7 and 7 is suppressed, and the fit of the absorbent article can be easily stabilized.

  Further, in the sanitary napkin 1 of the above-described embodiment, as shown in FIG. 1, the outward projecting portion 722 of the intermediate fixing portion 7 c in the leak-proof wall 7 faces outward in the width direction (X direction). Although it inclines so that it may stand up gradually, it does not need to incline and may be fixed over the whole width direction (X direction) of the intermediate fixing | fixed part 7c.

  Further, in the sanitary napkin 1 of the above-described embodiment, as shown in FIG. 1, the rear middle high portion 42 has a rear end portion 42 b that is tapered more than a front end portion 42 a of the rear middle high portion 42. However, it is not limited to a tapered shape. The planar shape of the front middle / high portion 41 is not limited to the above-described shape.

  FIGS. 5 and 6 show plan views of the second and third embodiments of the present invention. The sanitary napkin 1 of the present embodiment is the same as that described above except that the foremost intermediate groove 80 is formed. The same. In the sanitary napkin 1 according to the second embodiment shown in FIG. 5, the foremost intermediate groove 80 has a radius of curvature at the front end portion that is a half of the maximum width of the front middle high portion 41, like the rearmost intermediate groove 84. It is enlarged between the front end portions 7b, 7b of the leakage prevention walls 7, 7. The sanitary napkin 1 according to the third embodiment shown in FIG. 6 includes a tangent line TL at a position where the imaginary line IL that connects the front standing start positions of the pair of leak-proof walls 7 and 7 and the foremost intermediate groove 80 intersect each other. The foremost intermediate groove 80 is formed so that the angle α formed by the center line CL extending in the longitudinal direction is 45 ° or less. In the sanitary napkin 1 according to the third embodiment, the front end 7b of the pair of leak-proof walls 7 and 7 due to the contraction force of the elastic member 63 of the leak-proof wall 7 is formed by forming the foremost intermediate groove 80 in this way. , 7b, the deformation of the absorbent body 4 is suppressed, and the fit of the sanitary napkin 1 is improved.

  In addition to sanitary napkins, the absorbent article of the present invention can be suitably used for, for example, incontinence pads and panty liners.

It is a perspective view of the sanitary napkin which is embodiment of this invention. It is the X1-X1 sectional view taken on the line of the sanitary napkin shown in FIG. It is the X2-X2 sectional view taken on the line of the sanitary napkin shown in FIG. It is a perspective view of the use condition of the sanitary napkin shown in FIG. It is a top view of the sanitary napkin which is the 2nd Embodiment of this invention. It is a top view of the sanitary napkin which is the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Top surface sheet 3 Back surface sheet 31 Wing part 32 Back flap 4 Absorber 40 Middle high part 41 Front middle high part 41a Front end part of front middle high part 41b Rear end part of front middle high part 42 Back middle high part 42a Back middle high part Front end portion 42b Rear end portion of rear middle high portion 42c Side portion of rear middle high portion 43 Lower layer absorbent body 5 Absorbent main body 5b Front end portion of absorbent main body 5c, 5c Both sides in longitudinal direction of absorbent main body 5d Absorbent main body Rear end portion 6 Stretchable sheet 63 Elastic member 7 Leakage barrier 71 Base wall portion 71a Upper end portion 71b Fixed end portion 72 Elastic stretchable portion 72b Front elastic stretchable portion 72d Rear elastic stretchable portion 721 Inwardly projecting portion 722 Outwardly projecting portion 7b Front end portion 7c Intermediate fixing portion 7d Rear end portion 8 Embossed groove 80 Frontmost intermediate groove 81 Outer groove 82 Intermediate groove 83 Rear intermediate groove 84 Last Middle groove

Claims (3)

Absorbent body having a surface sheet on the skin contact surface side, a back sheet on the non-skin contact surface side, and an absorbent body interposed between the two sheets, and a pair of base wall portions on both longitudinal sides of the absorbent body And a pair of leak-proof walls each having a sheet-like elastic stretchable part connected to the upper end of the base wall part, and the sheet-like elastic stretchable part is stretched before and after the absorbent main body. An absorbent article that is fixed between an end portion and the front and rear end portions and is curved in a natural state before and after an intermediate fixing portion between the front and rear end portions,
The absorbent body has a mid-high portion raised to the top sheet side in the widthwise central region, the mid-high portion includes a front mid-high portion and a rear mid-high portion, and the front mid-high portion is a body fluid of the wearer. It is formed in the excretion part area that comes into contact with the excretion part,
A pair of said intermediate | middle fixing | fixed part is an absorbent article arrange | positioned in the width direction outer side of the area | region where the said back middle high part is arrange | positioned. An intermediate groove formed by consolidating the topsheet and the absorber is formed between the front middle high portion and the rear middle high portion, extending in the width direction of the absorbent article, and the rear A rear intermediate groove formed by consolidating the topsheet and the absorber is formed along the rear end at the rear end of the middle and high part,
Each of the pair of intermediate fixing portions is formed rearward of the intermediate groove, and each of the rear end portions of the pair of leak-proof walls extends rearward of the rear intermediate groove and is formed on the top sheet. The absorbent article according to claim 1, which is fixed.   In each of the pair of intermediate fixing portions, the planar elastic stretchable portion is configured such that the inner side in the width direction of the elastic stretchable portion is directly fixed to the topsheet or folded through the base wall portion. The absorptive article according to claim 1 or 2 which is fixed to a sheet indirectly and forms an overhanging part which is a free end which the width direction outside side of the elastic expansion and contraction part protrudes in the width direction outward.

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