JP2010131131A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article with an excellent appearance, whose surface sheet in a groove formed between a front center high part and a rear center high part is not easily peeled, and which does not easily give the feeling of incompatibility to a wearer. <P>SOLUTION: A sanitary napkin 1A is provided with a surface sheet 2, a back surface sheet 3 and an absorbent body 4 interposed between both sheets 2 and 3, and is practically vertically long. The absorbent body 4 has a center high part 40 raised on a skin abutting surface side in the width direction center area (CT). The center high part 40 comprises separately provided front center high part 41 and rear center high part 42, and an intermediate groove 62 is extended in a width direction (X direction) and formed between the front center high part 41 and the rear center high part 42. The height or angle of the rear portion 41b of the front center high part 41 in the sanitary napkin 1A is smaller than the height or angle of a center portion 42d of a center part 41d and/or the height or angle of the front portion 42a1 of the rear center high part 42 is formed to be smaller than the height or angle of the center portion 42d. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to absorbent articles such as sanitary napkins and incontinence pads.

  In an absorbent article such as a sanitary napkin, it is known to form a middle-high portion in the absorbent body in order to improve adhesion to the body and leakage prevention. For example, Patent Document 1 discloses a sanitary napkin in which an absorbent body is formed with a mid-high portion narrower than the width of the absorbent body over the drainage portion and the entire length in the longitudinal direction. Further, Patent Document 1 proposes that the top sheet and the absorbent body are fixed at the peripheral portion of the middle and high portions to prevent the middle and high portions from shifting and to maintain the shape.

  On the other hand, in order to prevent the force to be deformed from being transmitted to the other even if a force that deforms the middle / high part is generated in either the front part or the rear part of the absorbent article, for example, Patent Document 2 The middle / high part is composed of a front middle / high part and a rear middle / high part separately provided on the front part and the rear part of the absorbent article, and the front part or the rear part is deformed between the front middle part and the rear middle part. There is disclosed an absorbent article provided with a bending start point that does not affect the other. This bending starting point is a so-called embossed groove formed by compacting the surface sheet and the absorbent body of the sanitary napkin.

  However, the absorbent article as described in Patent Document 2, that is, the front middle high part and the rear middle high part are arranged at a predetermined interval in the longitudinal direction of the absorbent article, and the top sheet and the absorbent body are between both middle high parts. In the absorbent article in which the groove formed by consolidation is formed, especially in the groove located between the middle and high parts, the surface to be joined and integrated with the absorber that supports the middle and high parts from below The sheet floats from the surface of the absorbent body. As a result, the formability of the groove is lowered, and if the bonding strength is increased too much for the purpose of preventing the float, the surface sheet may be cut off.

  Various measures have been proposed for the formability of the grooves. For example, Patent Document 3 describes a method in which a step is formed on a pressure surface of a pressure roll used for forming a groove to provide a high pressure portion and a low pressure portion, and the groove is formed using the pressure roll. Yes. Further, Patent Document 4 describes a method for defining a difference in size between the existence area of the widthwise embossing groove extending in the width direction of the absorbent article and the existence area of the longitudinal embossing groove extending in the longitudinal direction within a specific range. ing. However, the methods described in Patent Documents 3 and 4 cannot effectively prevent the surface sheet from floating in a groove located between two middle and high portions arranged at a predetermined interval in the longitudinal direction of the absorbent article. .

Japanese Utility Model Publication No. 6-15621 JP 2006-239162 A JP 2000-14701 A JP 2003-265519 A

  Accordingly, an object of the present invention is to have a middle-high portion composed of a front middle-high portion and a rear middle-high portion, and a groove in which the surface sheet and the absorber are consolidated between the front middle-high portion and the rear middle-high portion. Nevertheless, it is an object of the present invention to provide an absorbent article that is difficult to peel off between the front middle high part and the rear middle high part, hardly gives the wearer a sense of incongruity, and has a good appearance.

  The present invention is an absorbent article comprising a top sheet that forms a skin contact surface, a back sheet that forms a non-skin contact surface, and an absorbent body interposed between both sheets, the absorbent body having its width A middle high portion that protrudes toward the skin contact surface side in the direction center region, and the middle high portion includes a front middle high portion and a rear middle high portion that are provided separately, and the front middle high portion and the rear middle high portion An intermediate groove formed by compacting the topsheet and the absorber is formed extending in the width direction, and the height or angle of the rear part of the front middle high part is the front middle high part Providing an absorbent article that is smaller than the height or angle of the central part of the rear and / or the height or angle of the front part of the rear middle high part is smaller than the height or angle of the central part of the rear middle high part The above-mentioned purpose is achieved.

  According to the absorbent article of the present invention, it is possible to prevent the surface sheet from being peeled between the front middle-high portion and the rear middle-high portion, and to improve the wearing feeling for the wearer. According to the absorbent article of the present invention, it is possible to prevent the surface sheet from peeling off between the front middle high portion and the rear middle high portion, and thus the appearance is also good.

  Hereinafter, a first preferred embodiment of a sanitary napkin that is an absorbent article of the present invention will be described with reference to FIGS.

As shown in FIG. 1, the absorbent article (sanitary napkin) 1A of the first embodiment is formed symmetrically with respect to a center line CL extending in the longitudinal direction of the sanitary napkin 1A.
The sanitary napkin 1A according to the first embodiment includes a top sheet 2 that forms a skin contact surface, a back sheet 3 that forms a non-skin contact surface, and both sheets 2 and 3, as shown in FIGS. It is a substantially vertically long thing which has the absorber 4 interposed in.
As shown in FIGS. 1 and 2, the absorbent body 4 of the sanitary napkin 1 </ b> A has a width direction (hereinafter referred to as “X direction”. X direction; a direction perpendicular to the center line CL) central region (CT). It has the middle-high part 40 which protrudes on the skin contact surface side. The middle-high portion 40 includes a front middle-high portion 41 and a rear middle-high portion 42 that are provided separately, and the top sheet 2 and the absorber 4 are formed between the front middle-high portion 41 and the rear middle-high portion 42 by being consolidated. The intermediate groove 62 is formed to extend in the width direction (X direction).
2 and 3, the rear part 41b of the front middle high part 41 in the sanitary napkin 1A is formed smaller than the height and angle of the central part 41d of the front middle high part 41, and the rear middle high part 42 The front part 42a is formed smaller than the height and angle of the central part 42d of the rear middle high part 42.

  As shown in FIG. 3, the rear middle portion 41 b of the front middle high portion 41 is approximately third in the longitudinal direction (hereinafter referred to as “Y direction”; Y direction; a direction parallel to the center line CL). It is a part located closest to the rear middle high part 42 among the divided parts, and is a part based on the center in the width direction (X direction) of the part. The center part 41d of the front middle high part 41 is a part located in the middle of the front middle high part 41 that is substantially divided into three in the longitudinal direction (Y direction), and the front part 41a of the front middle high part 41 is the front middle high part. 41 is a portion located in the front in the longitudinal direction (Y direction) from the central portion 41d that is substantially divided into three in the longitudinal direction (Y direction). The front part 42a of the rear middle high part 42 is a part located closest to the front middle high part 41 in the middle of the rear middle high part 42 in the longitudinal direction (Y direction), and the width direction (X (Direction) This is the part based on the center. About the center part 42d of the back middle high part 42, it is the same as that of the front middle high part 41, and the rear part 42b of the rear middle high part 42 is a middle center divided into approximately three equal parts in the longitudinal direction (Y direction) of the rear middle high part 42. This is a portion located behind the portion 42d in the longitudinal direction (Y direction).

  The sanitary napkin 1A according to the first embodiment will be described in detail. The sanitary napkin 1A according to the first embodiment includes a liquid-permeable surface sheet 2, a liquid-impermeable or repellent material as shown in FIGS. An aqueous back sheet 3 and an absorbent body 4 are provided. 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 1A. 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 an adhesive or the like. Is forming. The sanitary napkin 1A has leak-proof walls 7 on both sides in the longitudinal direction (Y direction) of the absorbent main body 5. The leak-proof wall 7 of the first embodiment forms a so-called T-shaped gather. The sanitary napkin 1A of the first embodiment has a pair of wings 31 at a position closer to the front than the center in the longitudinal direction (Y direction). 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 formed. These configurations are the same as the conventional products.

Next, the absorbent body 4 of the sanitary napkin 1A according to the first embodiment will be described.
In the sanitary napkin 1A of the first embodiment, as shown in FIGS. 1 and 2, the absorber 4 is disposed on the back sheet 3 and extends from the front region b to the rear region c. 43 and a middle-high portion 40 that protrudes toward the skin contact surface side in the width direction (X direction) central region (CT) of the lower layer absorber 43, and the middle-high portion 40 is a front middle-high portion provided separately. 41 and the rear middle-high part 42. Specifically, as shown in FIG. 1, the absorbent body 4 is the upper surface of the lower layer absorbent body 43, and the skin contact surface side of the lower layer absorbent body 43 in the front region b and the rear region c of the sanitary napkin 1 </ b> A. Furthermore, it has the front middle-high part 41 and the rear middle-high part 42 which are narrower than the lower layer absorber 43 and protrude convexly on the skin contact surface side. Here, the “front region b” refers to a region in the longitudinal direction (Y direction) of the sanitary napkin 1A relative to an intermediate groove 62 described later, and the “rear region c” refers to an intermediate groove 62 described later. The sanitary napkin 1A refers to a region behind the longitudinal direction (Y direction).

  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 FIG. 1, the center region in the width direction (X direction) of the lower layer absorber 43 (CT), which is formed over the longitudinal direction (Y direction) front and rear ends of the wing portion 31. The front middle high portion 41 of the first embodiment is formed such that the height of the rear portion 41b gradually decreases toward the rear middle high portion 42 as shown in FIG. Therefore, the height of any part of the rear part 41b of the front middle high part 41 of the first embodiment is smaller than the height of the central part 41d of the front middle high part 41. In addition, as shown in FIG. 2, the rear part 41 b of the front middle high part 41 near the intermediate groove 62 is formed to be inclined, whereas the center part 41 d of the front middle high part 41 has a longitudinal direction (Y And the inclination angle α of the rear portion 41b of the front middle high portion 41 is smaller than the angle (substantially 180 °) of the central portion 41d of the front middle high portion 41. Has been. The angle is based on a line that is in parallel with the front middle-high portion 41 along the longitudinal direction (Y direction). In the absorbent body 4 of the first embodiment, as shown in FIG. The part 41b is formed at approximately 180 °.

The length L1 (see FIG. 3) in the longitudinal direction (X direction) of the rear portion 41b of the front middle-high portion 41 is preferably 5 to 50 mm, and more preferably 10 to 30 mm. The ratio (L1 / La) between the length L1 of the rear part 41b and the total length La in the longitudinal direction (X direction) of the front middle-high part 41 is preferably 0.05 to 0.5, more preferably 0.1 to 0.1. 0.3.
The inclination angle α of the rear portion 41b of the front middle high portion 41 is preferably 135 to 178 °, more preferably 150 to 175 °. Note that the angle α is measured from the top sheet 2 in a state where the sanitary napkin is extended when the front middle-high portion 41 cannot be taken out from the sanitary napkin which is the final product form.

  As shown in FIG. 3, the front middle high portion 41 of the first embodiment includes a front portion 41 a and a rear portion 41 b in the longitudinal direction (Y direction) of the front middle high portion 41, as shown in FIG. 3. The sanitary napkin 1A is formed in a convex curve shape that protrudes outward in the longitudinal direction (Y direction). The length in the width direction (X direction) at the front portion 41a of the front middle high portion 41 is substantially the same as the length in the width direction (X direction) at the rear portion 41b of the front middle high portion 41, and the rear portion 41b of the front middle high portion 41. The curve radius of the convex curve shape is formed to be substantially the same as the curve radius of the convex curve shape of the front portion 41a 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 61 and an intermediate groove 62 described later.

  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 FIG. 1, the middle region of the lower layer absorber 43 in the width direction (X direction) (CT), which is formed behind the intermediate groove 62 in the longitudinal direction (Y direction) of the sanitary napkin 1A. The rear middle high portion 42 of the first embodiment is formed such that the height of the front portion 42a gradually decreases toward the front middle high portion 41 as shown in FIG. Therefore, the height of any part of the front part 42a of the rear middle high part 42 of the first embodiment is formed smaller than the height of the central part 42d of the rear middle high part 42. In addition, as shown in FIG. 2, the front part 42 a of the rear middle high part 42 near the intermediate groove 62 is formed to be inclined, whereas the center part 42 d of the rear middle high part 42 has a longitudinal direction (Y The angle β of the front part 42a of the rear middle high part 42 is smaller than the angle (substantially 180 degrees) of the central part 42d of the rear middle high part 42. Has been. The angle is based on a line that is in parallel with the rear middle high portion 42 along the longitudinal direction (Y direction) in the same manner as the front middle high portion 41. In the absorber 4 of the first embodiment, as shown in FIG. In addition, the central part 42d of the rear middle high part 42 is formed at approximately 180 °.

The length L2 (see FIG. 3) in the longitudinal direction (X direction) of the front portion 42a of the rear middle high portion 42 is preferably 5 to 50 mm, more preferably 10 to 30 mm. Further, the ratio (L2 / Lb) between the length L2 of the front portion 42a and the total length Lb in the longitudinal direction (X direction) of the rear middle high portion 42 is preferably 0.05 to 0.5, more preferably 0.00. 1 to 0.3.
The inclination angle β of the front part 42a of the rear middle high part 42 is preferably 135 to 178 °, more preferably 150 to 175 °. The angle β is measured in the same manner as the angle α when the front middle-high portion 41 cannot be taken out from the sanitary napkin which is the final product form.

  In the plan view of the sanitary napkin 1A, the rear middle high portion 42 of the first embodiment has a rear portion 42b of the rear middle high portion 42 (the one farther from the intermediate groove 62) of the rear middle high portion 42 as shown in FIG. It is formed in a tapered shape rather than the front part 42a. Specifically, as shown in FIG. 3, the front part 42a and the rear part 42b in the longitudinal direction (Y direction) of the rear middle high part 42 are both directed outward in the longitudinal direction (Y direction) of the sanitary napkin 1A. The convex curve shape of the rear curve 42b of the rear middle high part 42 far from the intermediate groove 62 has a convex curve shape of the front part 42a of the rear middle high part 42 close to the intermediate groove 62. It is formed so as to be smaller than the curved radius of the shape, and the rear middle high portion 42 is formed so that the width gradually decreases toward the rear portion 42b. As shown in FIG. 1, the rear middle high portion 42 is surrounded by a pair of rear inner grooves 63 and an intermediate groove 62 described later.

  As shown in FIG. 2, in the front middle high portion 41 of the first embodiment, the height and angle α of the rear portion 41 b of the front middle high portion 41 are both the height and angle of the central portion 41 d of the front middle high portion 41. The rear middle high part 42 is formed so that the height and angle β of the front part 42a of the rear middle high part 42 are the same as the center part 42d of the rear middle high part 42. It is formed to be smaller than the height and angle (approximately 180 °). The density of the rear part 41b of the front middle high part 41 of the first embodiment is substantially the same as the density of the center part 41d of the front middle high part 41, and the density of the front part 42a of the rear middle high part 42 is the density of the rear middle high part 42. The density is substantially the same as the density of the central portion 42d. The density can be measured, for example, by the following method.

<Density measurement method>
At room temperature, from the measurement site of the density in the middle and high parts of the absorbent body, a rectangular parallelepiped shape of 1 cm in the longitudinal direction (longitudinal direction of the absorbent article) and 3 cm in the lateral direction (width direction of the absorbent article) was cut out as a measurement sample, The weight (g) of the measurement sample is measured using an electronic balance. Such weight measurement is performed on five different measurement samples (n = 5), the average value of those measurement values is calculated, and the average value is divided by the area of the measurement sample (1 × 3 = 3 cm ² ). The basis weight (g / cm ² ) of the measurement sample is calculated. At room temperature, the five measurement samples are placed on a flat object such as a surface plate, and the thickness (cm) of each measurement sample in the thickness direction is measured using a laser displacement meter. The average value is calculated as the thickness of the measurement sample. And the density (g / cm < ³ >) of a measurement sample is computed by following Formula.
Density = basis weight ÷ thickness

  As shown in FIGS. 1 and 2, the sanitary napkin 1 </ b> A of the first embodiment has an embossed groove formed by compacting the topsheet 2 and the absorbent body 4. As shown in FIG. 1, a pair of embossed grooves are provided symmetrically with respect to a center line (CL line) extending in the longitudinal direction of the sanitary napkin 1A. In the embossed grooves, deeply formed portions and portions formed slightly shallower are alternately arranged to form a continuous line. In the sanitary napkin 1A of the first embodiment, the embossed groove has a front groove 61, an intermediate groove 62, a rear inner groove 63, and a rear outer groove 64, and the front outer groove 61 and the rear outer groove 64 are connected. A ring-shaped all-round leak-proof groove is formed.

  As shown in FIG. 1, a pair of front grooves 61 are provided symmetrically about a center line (CL line) extending in the longitudinal direction (Y direction) of the sanitary napkin 1A. Each front groove 61 is formed along the side part 41c of the front middle-high part 41 and is formed in a convex shape in the width direction (X direction) of the sanitary napkin 1A. As shown in FIG. 1, the front groove 61 of the sanitary napkin 1 </ b> A according to the first embodiment is formed of a pair of necks 1 </ b> A confined inside the sanitary napkin 1 </ b> A at the front part 41 a in the longitudinal direction (CL direction) of the front middle and high part 41. It has a constricted portion 61a, and a rear portion 41b has a pair of constricted portions 61b constricted inside the sanitary napkin 1A.

  As shown in FIGS. 1 and 2, the intermediate groove 62 is formed in the vicinity of the rear end in the longitudinal direction (Y direction) of the wing portion 31 of the sanitary napkin 1A. It is formed between the middle and high portions 42. As shown in FIG. 1, the shape of the intermediate groove 62 in the first embodiment extends in the width direction (X direction) of the sanitary napkin 1 </ b> A and protrudes toward the rear middle high portion 42 in a plan view of the sanitary napkin 1 </ b> A. Is formed. The curve radius of the intermediate groove 62 of the sanitary napkin 1A of the first embodiment is formed to be substantially the same as or slightly larger than the curve radius of the rear part 41b of the front middle-high part 41.

  As shown in FIG. 1, a pair of rear inner grooves 63 are provided symmetrically with respect to a center line (CL line) extending in the longitudinal direction of the sanitary napkin 1A. Each rear inner groove 63 is formed along the side part 42c of the rear middle high part 42 formed in a tapered shape.

  As shown in FIG. 1, a pair of rear outer grooves 64 are provided symmetrically with respect to the center line (CL line) of the sanitary napkin 1A. The rear outer groove 64 is formed outward in the width direction (X direction) of the sanitary napkin 1A from the rear inner groove 63. The rear outer groove 64 is formed in a convex shape in the width direction (X direction) of the sanitary napkin 1A. The rear outer groove 64 is connected to the outer groove 61, and forms a continuous emboss groove from the front part to the rear part in the longitudinal direction (Y direction) of the sanitary napkin 1A. The groove widths of the front groove 61, the intermediate groove 62, the rear inner groove 63, and the rear outer groove 64 are 1 mm to 20 mm, respectively.

A material for forming the sanitary napkin 1A according to the first embodiment will be described.
As the top sheet 2, the back sheet 3, the absorbent body 4, and the pair of leak-proof walls (gather) 7, any one 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 sheet forming the leak-proof wall (gather) 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. (Films, filaments, nonwoven fabrics, woven fabrics) and composite sheets of these stretchable materials (elastic members) and non-stretchable nonwoven fabrics.

  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 processing methods for forming the embossed grooves such as the front groove 61, the intermediate groove 62, the rear inner groove 63, and the rear outer groove 64 include embossing, heat embossing, ultrasonic embossing, and combinations of these. .

A method for forming the absorbent body 4 having the middle-high section 40 and the lower-layer absorbent body 43 including the front middle-high section 41 and the rear middle-high section 42 of the sanitary napkin 1A will be described with reference to FIGS.
The manufacturing method of the sanitary napkin 1A has a front middle high portion 41 and a rear middle high portion 42 that are raised on one surface side in the width direction (X direction) central region, and these middle high portions 41, 42 are in the longitudinal direction (Y direction). And an absorbent body forming step for forming the absorbent bodies 4 arranged at predetermined intervals.
As shown in FIG. 6, the absorber 4 includes a first laminated drum 100 that continuously forms the lower layer absorber 43 and a second laminated drum 200 that continuously forms the middle and high portions 40 on one surface side of the lower layer absorber 43. It is formed by using.

  As shown in FIGS. 6 and 7, the lower layer absorber 43 is a first laminate in which a plurality of lower layer absorber forming recesses 430 having a three-dimensional pattern corresponding to the lower layer absorber 43 are provided on the outer peripheral surface at predetermined intervals. It is formed by the drum 100. As shown in FIG. 6, the first laminated drum 100 includes a first supply device 101 that supplies the raw material of the lower layer absorber 43 by scattering to the outer peripheral surface thereof, and the raw material supplied from the first supply device 101. In the lower layer absorber forming recesses 430, and the raw material deposits are sequentially released from the respective lower layer absorber forming recesses 430 to continuously manufacture the lower layer absorber 43. As shown in FIG. 7A, the shape of the recess 430 for forming the lower layer absorbent body forming the sanitary napkin 1A of the first embodiment is a rectangular shape whose bottom shape is long in the rotation direction of the first laminated drum 100. Yes, as shown in FIG. 7B, the depth is substantially constant.

  As shown in FIGS. 6 and 8, the middle-high portion 40 includes a front middle-high portion forming recess 410 having a three-dimensional pattern corresponding to the front middle-high portion 41 and a rear middle-high portion having a three-dimensional pattern corresponding to the rear middle-high portion 42. The middle and high portion forming recesses 400 including the forming recesses 420 are formed by the second laminated drum 200 having a plurality of outer peripheral surfaces provided at predetermined intervals. As shown in FIG. 6, the second laminated drum 200 includes a second supply device 201 that scatters and supplies the raw material of the front middle-high portion 41 and the rear middle-high portion 42 to the outer peripheral surface thereof. The material supplied from is sucked and deposited in the middle / high part forming recesses 400, and the material deposits are sequentially released from the middle / high part forming recesses 400, so that the middle / high part 40 is continuously removed from one surface of each lower layer absorber 43. It is a device manufactured on the side.

  The shapes of the front middle and high part forming concave part 410 and the rear middle and high part forming concave part 420 forming the sanitary napkin 1A of the first embodiment will be described with reference to FIG. As shown in FIG. 8A, the shapes of the front middle and high portion forming concave portion 410 and the rear middle and high portion forming concave portion 420 are such that the planar shapes thereof are the front middle and high portion 41 and the rear middle and high portion of the first embodiment described above. It is formed in the same manner as the planar shape of 42 (see FIG. 3). In the sanitary napkin 1 </ b> A, the front middle and high portion forming concave portion 410 has a bottom surface of the front middle and high portion forming concave portion 410 having a depth close to the rear middle and high portion forming concave portion 420. Further, the rear middle-high portion forming concave portion 420 is formed so that the depth of the portion near the front middle-high portion forming concave portion 410 on the bottom surface of the rear middle-high portion forming concave portion 420 is lower than the rear middle-high portion. It is formed shallower than the depth of the central portion of the bottom surface of the part-forming recess 420. Specifically, as shown in FIG. 8 (b), the depth of the front middle and high portion forming concave portion 410 is the middle portion of the rear middle and high portion obtained by dividing the entire length of the front middle and high portion forming concave portion 410 in the rotational direction. The 1/3 portion 411 near the forming recess 420 is gradually shallower toward the rear middle and high portion forming recess 420 side, and the remaining 2/3 portion is formed to have a substantially constant depth. As shown in FIG. 8 (b), the depth of the rear middle-high portion forming concave portion 420 is closer to the middle portion of the middle portion, which is formed by dividing the overall length of the rear middle-high portion forming concave portion 420 into approximately three equal parts. 1/3 of the second portion 421 is gradually shallower toward the front middle-high portion forming concave portion 410 side, and the remaining 2/3 portion is formed at a substantially constant depth. As shown in FIG. 8 (b), the rear middle and high part forming concave part 420 and the front middle and high part forming concave part 410 have a depth of a 2/3 portion of the rear middle and high part forming concave part 420 and the front middle and high part forming concave part. The depth of the 2/3 portion of 410 is formed substantially the same, and is formed deeper than the depth of the lower-layer absorber-forming recess 430.

  In the front middle high portion 41 formed by the second laminated drum 200, the density of the constituent material of the rear portion 41b of the front middle high portion 41 is substantially the same as the density of the central portion 41d in the longitudinal direction (Y direction) of the front middle high portion 41. Become. Further, in the rear middle high portion 42 formed by the second laminated drum 200, the density of the front portion 42a of the rear middle high portion 42 is substantially the same as the density of the central portion 42d in the longitudinal direction (Y direction) of the rear middle high portion 42. Thus, since the density is the same in any part of the front middle high part 41 and the rear middle high part 42, the formed absorbent body 4 is soft and fits the body. Moreover, a feeling of fitting and fitting property become favorable.

  When the materials constituting the front middle-high portion 41 and the rear middle-high portion 42 are different, the first laminated drum provided with a plurality of concave portions of a three-dimensional pattern corresponding to the lower layer absorber 43 on the outer peripheral surface, and the front middle-high portion The second lamination drum provided with a plurality of concave portions of a three-dimensional pattern corresponding to 41 on the outer peripheral surface, and the third lamination drum provided with a plurality of concave portions of a three-dimensional pattern corresponding to the rear middle-high portion 42 on the outer peripheral surface It is formed by using three laminated drums consisting of a drum.

  In the first laminated drum, first, the constituent material of the lower layer absorber 43 is sucked into the concave portion of the first laminated drum, and then the constituent material sucked into the concave portion is transferred to form the lower layer absorber 43. Next, in the second lamination drum, the constituent material of the front middle high portion 41 is sucked into the concave portion of the pattern of the front middle high portion 41 of the second lamination drum, and in the third lamination drum, the rear middle high portion 42 of the third lamination drum. The constituent material of the rear middle-high portion 42 is sucked into the concave portion of the pattern. Next, the constituent material sucked into the concave portions of the second and third lamination drums is transferred onto one surface of the lower layer absorber 43 formed by the first lamination drum, and the front middle height is transferred onto the lower layer absorber 43. The absorber 4 which has the part 41 and the back middle high part 42 can be formed. In addition, the lower layer absorber 43 is not restrict | limited to the above-mentioned method, For example, a pulp is continuously piled on an absorbent paper directly, and the lower layer absorber may be shape | molded by cutting back and forth in a post process.

  As shown in FIGS. 1 and 2, the sanitary napkin 1A according to the first embodiment is an upper surface of the absorbent body 4 and is provided separately on the front part b and the rear part c of the sanitary napkin 1A. It has a middle high part 41 and a rear middle high part 42. Therefore, since there is no middle-high part 40 in the part which can be bent greatly in the body shape, the rigidity of the product of the part becomes small and it becomes easy to fit the body shape.

  Further, as shown in FIG. 2, the sanitary napkin 1 </ b> A according to the first embodiment is such that the height of the rear part 41 b (the end surface closer to the intermediate groove 62) of the front middle high part 41 is the center part of the front middle high part 41. It is formed smaller than the height of 41d. Therefore, with respect to the intermediate groove 62 formed by consolidating the topsheet 2 and the absorber 4, the restoring force of the constituent material of the front middle-high portion 41 is hardly generated, and the topsheet 2 is not easily peeled off from the absorber 4. It is hard to give an uncomfortable feeling to the person and the appearance is good. In the sanitary napkin 1A of the first embodiment, the height of the front part 42a of the rear middle high part 42 (the end surface closer to the intermediate groove 62) is smaller than the height of the central part 42d of the rear middle high part 42. Has been. Therefore, it is difficult for the restoring force of the constituent material of the rear middle high portion 42 to be generated with respect to the intermediate groove 62, and the top sheet 2 is further difficult to peel off from the absorbent body 4, making it difficult for the wearer to feel uncomfortable, and the appearance is also good. .

  Further, as shown in FIG. 3, the sanitary napkin 1 </ b> A of the first embodiment is such that the front part 42 a of the rear middle high part 42 (closer to the intermediate groove 62) is tapered than the rear part 42 b of the rear middle high part 42. It has become. Thus, by forming the back middle high part 42, it is easy to fit a wearer's body and the flow of menstrual blood to the back can be prevented.

Next, a sanitary napkin according to a second embodiment of the present invention will be described with reference to FIG.
About the sanitary napkin 1B of 2nd Embodiment, a different point from the sanitary napkin 1A of 1st Embodiment is demonstrated. The points that are not particularly described are similar to the sanitary napkin 1A of the first embodiment, and the description of the sanitary napkin 1A of the first embodiment is applied as appropriate.

  In the plan view of the sanitary napkin 1B, the front middle high part 41 of the sanitary napkin 1B according to the second embodiment is configured such that the rear part 41b of the front middle high part 41 is the front part 41a of the front middle high part 41 as shown in FIG. It is formed in a more tapered shape. Specifically, as shown in FIG. 4, the front part 41a and the rear part 41b in the longitudinal direction (Y direction) of the front middle-high part 41 are both directed outward in the longitudinal direction (Y direction) of the sanitary napkin 1B. The convex radius of the convex curve of the rear part 41b of the front middle high part 41 close to the intermediate groove 62 is greater than the curved radius of the convex curve of the front part 41a of the front middle high part 41. The rear part 42 b of the front middle high part 41 is formed so that the width gradually decreases toward the rear middle high part 42. The curved radius of the rear part 41b of the front middle-high part 41 of the sanitary napkin 1B of the second embodiment is formed to be smaller than the curved radius of the intermediate groove 62. That is, the curve radius of the intermediate groove 62 is formed larger than the curve radius of the rear part 41 b of the front middle-high part 41.

  In the plan view of the sanitary napkin 1B, the rear middle high part 42 of the sanitary napkin 1B according to the second embodiment is configured such that the front part 42a of the rear middle high part 42 is the rear part 42b of the rear middle high part 42 as shown in FIG. It is formed in a more tapered shape. Specifically, as shown in FIG. 4, the front part 42a and the rear part 42b in the longitudinal direction (Y direction) of the rear middle high part 42 are both directed outward in the longitudinal direction (Y direction) of the sanitary napkin 1B. The convex radius of the convex portion of the front portion 42a of the rear middle high portion 42 close to the intermediate groove 62 is larger than the curved radius of the convex shape of the rear portion 42b of the rear middle high portion 42. The front part 42 a of the rear middle high part 42 is formed so that the width gradually decreases toward the front middle high part 41.

The effect at the time of using the sanitary napkin 1B of 2nd Embodiment of this invention mentioned above is demonstrated.
The sanitary napkin 1B of the second embodiment has the same effect as the sanitary napkin 1A of the first embodiment. Hereinafter, effects different from the sanitary napkin 1A of the first embodiment will be described.

  As shown in FIG. 4, the sanitary napkin 1 </ b> B of the second embodiment is such that the rear part 41 b (the side closer to the intermediate groove 62) of the front middle / high part 41 is tapered than the front part 41 a of the front middle / high part 41. Yes. Therefore, the restoring force of the constituent material of the front middle high part 41 is lower in the rear part 41b than in the front part 41a, the topsheet 2 in the intermediate groove 62 is difficult to peel off from the absorber 4, and it is difficult to give the wearer an uncomfortable feeling. Appearance is also good. In the sanitary napkin 1B of the second embodiment, the front part 42a (the one closer to the intermediate groove 62) of the rear middle high part 42 is further tapered than the rear part 42b of the rear middle high part 42. Therefore, the topsheet 2 in the intermediate groove 62 is further difficult to peel off from the absorbent body 4, it is difficult for the wearer to feel uncomfortable, and the appearance is also good.

  Moreover, as for the sanitary napkin 1B of 2nd Embodiment, as shown in FIG. 1, FIG. 4, the curve radius of the intermediate groove 62 becomes larger than the taper-shaped curve radius of the back part 41b of the front middle high part 41. As shown in FIG. Is formed. Therefore, a space can be provided between the end of the rear part 41 b of the front middle-high part 41 and the intermediate groove 62. Therefore, the restoring force of the constituent material of the front middle high portion 41 is not easily generated with respect to the intermediate groove 62, the topsheet 2 is hardly peeled off from the absorbent body 4, the wearer is unlikely to feel uncomfortable, and the appearance is good.

Next, a sanitary napkin according to a third embodiment of the present invention will be described with reference to FIG.
Regarding the sanitary napkin 1C of the third embodiment, differences from the sanitary napkin 1A of the first embodiment will be described. The points that are not particularly described are similar to the sanitary napkin 1A of the first embodiment, and the description of the sanitary napkin 1A of the first embodiment is applied as appropriate.

  As shown in FIG. 5, the rear middle portion 41 b of the sanitary napkin 1 </ b> C of the third embodiment is inclined stepwise. Specifically, as shown in FIG. 5, the rear portion 41 b has an inclined portion 41 b 1 that is formed gradually smaller toward the rear middle-high portion 42, and a height that is continuous with the inclined portion 41 b 1 to be substantially constant. And a horizontal portion 41b2. Since parts other than the rear part 41b of the front middle-high part 41, for example, the front part 41a, the center part 41d, etc. are substantially constant as shown in FIG. 5, the rear part 41b of the front middle-high part 41 is It is formed so as to be inclined.

  The length L3 (refer to FIG. 5) of the horizontal part 41b2 of the rear part 41b in the front middle-high part 41 is shorter than L1, preferably 5 to 50 mm, and more preferably 5 to 20 mm.

  As shown in FIG. 5, the rear middle high portion 42 of the sanitary napkin 1 </ b> C of the third embodiment has a front portion 42 a that is inclined in stages. Specifically, as shown in FIG. 5, the front portion 42 a has an inclined portion 42 a 1 whose height is gradually reduced toward the front middle-high portion 41, and a height that is continuous with the inclined portion 42 a 1. And a horizontal portion 42a2 that is substantially constant. As shown in FIG. 5, the portions other than the front portion 42a of the rear middle high portion 42, for example, the rear portion 42b, the central portion 42d, and the like are substantially constant in height. It is formed so as to be inclined.

  The length L4 (see FIG. 5) in the longitudinal direction (X direction) of the horizontal portion 42a2 of the front portion 42a in the rear middle high portion 42 is shorter than L2, preferably 5 to 50 mm, and more preferably 5 to 20 mm.

The effect at the time of using the sanitary napkin 1C of 3rd Embodiment of this invention mentioned above is demonstrated.
The sanitary napkin 1C of the third embodiment has the same effects as the sanitary napkin 1A of the first embodiment. Hereinafter, effects different from the sanitary napkin 1A of the first embodiment will be described.

  As shown in FIG. 4, the sanitary napkin 1C according to the third embodiment has a boundary between the inclined portion 41b1 and the horizontal portion 41b2 of the front absorbent body 41 and a boundary between the inclined portion 42a1 and the horizontal portion 42a2 of the rear absorbent body 42. The part becomes easy to bend and fits the body more easily.

  The absorbent article of the present invention is not limited to the sanitary napkins 1A, 1B, and 1C of the first embodiment, the second embodiment, and the third embodiment described above. Each component in the sanitary napkin of 3rd Embodiment can be suitably changed in the range which does not impair the meaning of this invention.

  For example, in the sanitary napkins 1A, 1B, and 1C of the first embodiment, the second embodiment, and the third embodiment described above, as shown in FIGS. Although it is formed from two middle high parts of the back middle high part 42, it may be formed from two or more middle high parts.

  In the sanitary napkins 1A, 1B, and 1C of the first embodiment, the second embodiment, and the third embodiment described above, as shown in FIGS. 2 and 5, the height of the rear portion 41b of the front middle-high portion 41 is high. Although the height is formed smaller than the height of the central portion 41d of the front middle high portion 41, it may be formed smaller than the height of the front portion 41a of the front middle high portion 41, or the front portion 42a of the rear middle high portion 42. Or you may form smaller than the height of the rear part 42b. Similarly, the height of the front part 42a of the rear middle high part 42 may be formed smaller than the height of the rear part 42b of the rear middle high part 42, and the front part 41a of the front middle high part 41 or the height of the rear part 41b. You may form smaller than this.

  In the sanitary napkins 1A, 1B, and 1C of the first embodiment, the second embodiment, and the third embodiment described above, as shown in FIGS. 2 and 5, the height of the rear portion 41b of the front middle-high portion 41 is high. The height is formed smaller than the height of the central portion 41d of the front middle high portion 41, and the height of the front portion 42a of the rear middle high portion 42 is formed smaller than the height of the central portion 42d of the rear middle high portion 42. However, it suffices that at least one of the front middle-high part 41 and the rear middle-high part 42 satisfies the requirements.

  In the sanitary napkins 1A and 1B of the first and second embodiments described above, the rear part 41b of the front middle high part 41 is the height of the central part 41d of the front middle high part 41 as shown in FIG. The front part 42a of the rear middle high part 42 is formed smaller than the height and angle of the central part 42d of the rear middle high part 42, but at least one of the height and the angle is a requirement. As long as In addition, the small angle or the small height does not require the entire angle or height of the rear part 41b of the front middle high part 41 or the front part 42a of the rear middle high part 42 to be small.

  Further, the sanitary napkins 1A, 1B, and 1C of the first embodiment, the second embodiment, and the third embodiment described above include a rear inner groove 63 and a rear outer groove 64, as shown in FIG. However, it may not be provided.

  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 1st Embodiment of this invention. It is the Y1-Y1 sectional view taken on the line of the sanitary napkin shown in FIG. It is a top view of the mid-high part of the sanitary napkin shown in FIG. It is a top view of the mid-high part of the sanitary napkin of 2nd Embodiment of this invention. It is sectional drawing of the sanitary napkin of 3rd Embodiment of this invention. It is the schematic of the process of forming the absorber of the sanitary napkin of this invention. (A) is a partial top view of the outer peripheral surface of a 1st lamination | stacking drum, (b) is the X1-X1 sectional view taken on the line of (a). (A) is a partial top view of the outer peripheral surface of a 2nd lamination | stacking drum, (b) is X2-X2 sectional view taken on the line of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Top sheet 3 Back sheet 31 Wing part 4 Absorber 40 Middle high part 41 Front middle high part 41a Longitudinal front part 41b Front middle high part 41b1 Longitudinal rear part 41b1 Inclined part, 41b2 Horizontal part 41c Side part of front middle high part 41d Longitudinal center part of front middle high part 42 Rear middle high part 42a Longitudinal front part of rear middle high part 42a1 Inclined part, 42a2 Horizontal part 42b Rear rear part of rear middle high part 42c Rear part Middle part of middle and high part 42d Middle part of longitudinal direction of rear middle and high part 43 Lower layer absorbent body 5 Absorbent main body 61 Front groove 61a, 61b Constricted part 62 Intermediate groove 63 Rear inner groove 64 Rear outer groove 7 Leakage prevention wall (gather)
DESCRIPTION OF SYMBOLS 100 1st lamination | stacking drum 101 1st supply apparatus 200 2nd lamination | stacking drum 201 2nd supply apparatus 400 Middle high part formation recessed part 410 Front middle high part formation recessed part 420 Rear middle high part formation recessed part 430 Lower part absorber formation recessed part

Claims (5)

An absorbent article comprising a top sheet that forms a skin contact surface, a back sheet that forms a non-skin contact surface, and an absorber interposed between both sheets,
The absorbent body has a mid-high portion that protrudes toward the skin contact surface side in the center region in the width direction, and the mid-high portion includes a front mid-high portion and a rear mid-high portion that are separately provided, and the front mid-height An intermediate groove formed by compacting the top sheet and the absorber is formed between the portion and the rear middle high portion, extending in the width direction,
The height or angle of the rear part of the front middle high part is smaller than the height or angle of the center part of the front middle high part, and / or the height or angle of the front part of the rear middle high part is the height of the rear middle high part. An absorbent article smaller than the height or angle of the central part.   The density of the rear part of the front middle high part whose height or angle is smaller than the central part of the front middle high part is substantially the same as the density of the central part of the front middle high part, and / or the central part of the rear middle high part. The absorbent article according to claim 1, wherein the density of the front part of the rear middle high part having a smaller height or angle is substantially the same as the density of the central part of the rear middle high part.   In a plan view of the absorbent article, a rear part of the front middle high part whose height or angle is smaller than a center part of the front middle high part is formed in a tapered shape than a front part of the front middle high part, and / or The absorbent article according to claim 1, wherein a front part of the rear middle high part having a smaller height or angle than a center part of the rear middle high part is formed in a tapered shape than a rear part of the rear middle high part. . In a plan view of the absorbent article, the rear part of the front middle high part whose height or angle is smaller than the center part of the front middle high part is formed in a tapered shape than the front part of the front middle high part,
In the plan view of the absorbent article, the intermediate groove is formed so as to protrude toward the rear middle high portion, and the curved radius of the intermediate groove is smaller than the tapered curved radius of the rear portion of the front middle high portion. The absorbent article according to claims 1 to 3, which is also larger. It is a manufacturing method of the absorptive article according to claim 1,
An absorbent body forming step of forming an absorbent body having a front middle high portion and a rear middle high portion protruding on one surface side in the width direction central region, the middle high portions being arranged at predetermined intervals in the longitudinal direction;
The absorbent body forming step includes a step of forming a middle-high portion forming recess composed of a three-dimensional front middle-high portion-forming concave portion corresponding to the front middle-high portion and a three-dimensional rear middle-high portion-forming concave portion corresponding to the rear middle-high portion. Using a rotating drum with multiple surfaces,
The depth of the portion near the rear middle-high portion forming recess on the bottom surface of the front middle-high portion forming recess is shallower than the depth of the center portion on the bottom surface of the front middle-high portion forming recess, and / or the rear middle-high portion formation. The manufacturing method of an absorbent article in which the depth of the part near the said front middle high part formation recessed part in the bottom face of the recessed part for shallower is shallower than the depth of the center part in the bottom face of this recessed part for rear middle high part formation.

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