JP2018102639A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of achieving sufficient fitness, reducing stickiness and stuffy feeling in wearing time and excellent in a wearing feeling.SOLUTION: An absorbent article 1 of the invention comprises a skin side sheet 2, a non-skin side sheet 3, and an absorbent core 41. The absorbent core 41 has a second area 41M between a first area 41F on a front section A side and a third area 41R on a rear section C side, and the second area 41M has an intermediate middle height part 42, and the third area 41R has a rear middle height part 47. The intermediate middle height part 42 and the rear middle height part 47 are separated through a middle height interval area 41D. The skin side sheet 2 comprises a high/low salient part row area 49 in which, high salient part rows 21L in which high salient parts 2t1 are arranged in a lateral direction Y and low salient part rows 22L in which low salient parts 2t2 are arranged in the lateral direction Y are alternately arranged in the vertical direction X. The high/low salient part row area 49 is overlapped to the middle height interval area 41D.SELECTED DRAWING: Figure 1

Description

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

  Conventionally, in absorbent articles such as sanitary napkins and disposable diapers, a method has been proposed in which a large amount of body fluid is absorbed in the absorbent core by providing a middle and high portion having a large basis weight at the central portion.

  In order to fit the wearer's body, the applicant first provided a middle high portion in each of the front region and the rear region in the absorbent core of the absorbent article, and each of the middle high portions is a longitudinal portion of the absorbent core. The absorbent article arranged at intervals in the direction was proposed (Patent Document 1).

  Further, as a technique different from these techniques, in order to reduce stickiness and stuffiness, the applicant of the present invention uses a high convex portion and a low height lower than the high convex portion as a surface sheet of an absorbent article. A plurality of convex portions, a plurality of high convex portions arranged in the horizontal direction, and a plurality of low convex portions arranged in the horizontal direction. And the absorbent article using the surface sheet alternately arranged by the vertical direction was proposed (patent document 2).

JP 2006-239162 A JP-A-2015-186543

  However, in the techniques disclosed in these patent documents, there is room for improvement in terms of compatibility between fit feeling and difficulty in wearing.

  Therefore, this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention comprises a skin-side sheet, a non-skin-side sheet, and an absorbent core interposed between these two sheets, and a longitudinal direction corresponding to the wearer's front-rear direction and a transverse direction orthogonal to the longitudinal direction; An absorbent article having a front section and a rear section, wherein the absorbent core is disposed between a first region located on the front section side and a third region located on the rear section side. It has two regions, and has a middle, middle and high portion that is thicker than its front and rear portions in the central portion in the lateral direction in the second region, and a rear portion that is thicker than its front and rear portions in the central portion in the horizontal direction in the third region. It has a middle-high portion, and the middle middle-high portion and the rear middle-high portion are separated from each other via a middle-high space region, and the skin-side sheet has a high-convex portion protruding to the skin facing surface side. A plurality of rows of high protrusions arranged in the horizontal direction and a height lower than the high protrusions The low convex part row in which a plurality of convex parts are arranged in the horizontal direction has high and low convex part row regions alternately arranged in the vertical direction, and the high and low convex part row regions overlap with the middle and high interval regions. An absorbent article is provided.

  According to the present invention, sufficient fit is obtained, and the feeling of stickiness and stuffiness at the time of wearing is reduced and the feeling of wearing is excellent.

FIG. 1 is a plan view showing a skin facing surface side (skin side sheet side) of a sanitary napkin which is a preferred embodiment of the absorbent article of the present invention. FIG. 2 is a plan view of the skin facing surface side of the absorbent core of the sanitary napkin shown in FIG. FIG. 3 is a perspective view of the absorbent core shown in FIG. FIG. 4 is a plan view schematically showing a skin-side sheet that overlaps the middle and high spacing regions of the absorbent core shown in FIG. 2 in the sanitary napkin shown in FIG. FIG. 5 is a cross-sectional view schematically showing a cross section taken along line VV shown in FIG. 6 is a cross-sectional view schematically showing a cross section taken along line VI-VI in FIG. 7 (a) and 7 (b) are explanatory views for explaining a manufacturing process of the absorbent core included in the sanitary napkin shown in FIG. FIG. 8 is a plan view showing the shape and arrangement pattern of the embossed portion in the skin side sheet in the sanitary napkin shown in FIG. 1. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line IX-IX shown in FIG. 10 is a cross-sectional view schematically showing a cross section taken along line XX shown in FIG. 11 is a cross-sectional view schematically showing a cross section taken along line XI-XI shown in FIG.

  Hereinafter, an absorbent article of the present invention will be described with reference to the drawings based on a sanitary napkin 1 (hereinafter also referred to as “napkin 1”) which is a preferred embodiment thereof. The top view which looked at the napkin 1 of this embodiment from the skin side sheet | seat side is shown by FIG. As shown in FIG. 1, the napkin 1 according to this embodiment includes a skin-side sheet 2 that forms a skin-facing surface, a non-skin-side sheet 3 that forms a non-skin-facing surface, and an intervening sheet between the two sheets 2 and 3. A longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal to the longitudinal direction X, and a front section A and a rear section C. As shown in FIG. 1, the napkin 1 is divided into an intermediate area B disposed opposite to the wearer's liquid excretion part, and a front area A and a rear area C disposed before and after the longitudinal direction X of the intermediate area B. It is divided.

  In this specification, the vertical direction X corresponds to the longitudinal direction of the wearer, matches the longitudinal direction of the absorbent article (napkin 1), and the lateral direction Y indicates the width direction of the absorbent article (napkin 1). (Direction perpendicular to the longitudinal direction). Therefore, unless otherwise specified, in this specification, the length in the longitudinal direction (vertical direction X) means the “length” that is a distance measured in the vertical direction X, and the length in the lateral direction Y The length means “width” which is a distance measured in the lateral direction Y. The napkin 1 is formed symmetrically with respect to a center line CL extending in the vertical direction X. The vertical direction X is also a direction parallel to the center line CL. Moreover, in this specification, a skin opposing surface is a surface turned to a wearer's skin side at the time of wear of the absorptive article (napkin 1) in the absorptive article (napkin 1) or its constituent member, for example, absorber 4. The non-skin facing surface is directed to the side opposite to the skin side (clothing side) when the absorbent article (napkin 1) is worn in the absorbent article (napkin 1) or its constituent member, for example, the absorbent body 4 It is a surface that is

  As shown in FIG. 1, the napkin 1 has an intermediate area B disposed opposite to the wearer's liquid excretion part (vaginal opening or the like) when worn, and closer to the wearer's ventral side (front side) than the intermediate area B The front section A is disposed, and the rear section C is disposed closer to the wearer's back side (rear side) than the intermediate section B. That is, the napkin 1 is divided in the longitudinal direction X in the order of the front section A, the intermediate section B, and the rear section C.

  In the absorbent article of the present invention, the intermediate zone B is a region having one wing portion 1W in the longitudinal direction X (one wing portion 1W) when the wing portion 1W is provided like the napkin 1 of the present embodiment. The area between the base along the vertical direction X and the root along the vertical direction X of the other wing part 1W. Moreover, in the case of the absorbent article which does not have a wing part, when the absorbent article is folded into the three-fold individual form, two folding lines (crossing the absorbent article in the lateral direction Y ( (Not shown) means a region surrounded by a first folding line and a second folding line as counted from the front end in the longitudinal direction X of the absorbent article.

  As shown in FIG. 1, the napkin 1 of the present embodiment includes a liquid-permeable skin-side sheet 2 that forms a skin-facing surface, a non-skin-side sheet 3 that forms a non-skin-facing surface, and both of these sheets 2, 3. It has an absorber 4 interposed therebetween. The absorber 4 includes an absorbent core 41 and a core wrap sheet (not shown) that wraps the absorbent core 41.

  In the napkin 1, the skin-side sheet 2 covers the entire area of the skin-facing surface of the absorbent body 4 and extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 as shown in FIG. 1. I'm out. On the other hand, the non-skin side sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4, and further extends outward in the lateral direction Y from both side edges along the vertical direction X of the skin side sheet 2, and will be described later. A rear flap portion 1S is formed together with the side seat 5. The non-skin side sheet 3 and the side sheet 5 are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal at the extended portions from both side edges along the longitudinal direction X of the absorber 4. Yes. In addition, between the skin side sheet | seat 2 and the non-skin side sheet | seat 3, and the absorber 4 may be joined by the adhesive agent.

  In the napkin 1, the side sheet | seat 5 is distribute | arranged to the both sides along the vertical direction X in the skin opposing surface of the skin side sheet | seat 2, as shown in FIG. Preferably, the side sheet 5 is arranged over the entire length in the longitudinal direction X of the skin side sheet 2 so as to overlap both left and right side portions along the longitudinal direction X of the skin side sheet 2 in plan view.

  In the napkin 1, the rear flap portion 1 </ b> S greatly protrudes outward in the lateral direction Y in the rear section C as shown in FIG. 1. Back flap part 1S is arranged on the inner surface (surface directed to the skin side) of clothing such as shorts when worn. It is preferable that an adhesive portion for fixing to the inner surface of clothes such as shorts is also provided on the surface of the rear flap portion 1S made of the non-skin side sheet 3. In the napkin 1, the pair of wing portions 1 </ b> W and 1 </ b> W project greatly outward in the lateral direction Y in the intermediate section B. The wing portion 1W is used by being folded back to the non-skin facing surface side of the crotch portion of clothing such as shorts, and is attached to the non-skin facing surface of the crotch portion of clothing such as shorts. Is provided. Moreover, as shown in FIG. 1, the skin side sheet | seat 2 and the non-skin side sheet | seat 3 are extended to the outward of the vertical direction X from the front end and the rear end of the vertical direction X of the absorber 4, respectively, and those extension parts Are joined to each other by a known joining means such as an adhesive, heat sealing, ultrasonic sealing or the like to form an end seal portion.

  In the napkin 1, the absorbent core 41 that constitutes the absorbent body 4 has a vertically long shape that is long in the vertical direction X, as shown in FIG. It has the 3rd field 41R located in section C side, and has the 2nd field 41M between the 1st field 41F and the 3rd field 41R. Moreover, the absorptive core 41 has the middle middle-high part 42 whose thickness is thicker than its front and rear portions at the central portion in the lateral direction Y in the second region 41M, and from its front and rear portions at the central portion in the lateral direction Y in the third region 41R. The rear middle / high part 47 having a large thickness is provided. The middle middle high part 42 and the rear middle high part 47 are each thicker than the thickness in the peripheral region 41Ar of the absorbent core 41, and have a larger basis weight than the basis weight of the peripheral region 41Ar of the absorbent core 41. Yes. The peripheral region 41Ar of the absorbent core 41 refers to the center middle middle / high portion 42C, the pair of side middle middle / high portions 42S and 42S, the rear middle / high portion 47, the groove 45 described later, and the middle / high gap groove described later. The surrounding area excluding 48 is meant.

  When the pair of wing portions 1W, 1W are provided on both outer sides in the lateral direction Y as in the napkin 1 shown in FIG. 1, the roots of the wing portions 1W arranged at intervals in the longitudinal direction X in each wing portion 1W. There is a second region 41M between them (see FIG. 2). In the napkin 1, the length L2 (see FIG. 2) of the second region 41M in the vertical direction X is determined by the roots of the wing portions 1W (see FIG. 1) arranged at intervals in the vertical direction X in each wing portion 1W. It is the same as the length between.

  In the napkin 1, the middle, middle and high portions 42 arranged in the second region 41 </ b> M have a long oval shape in the longitudinal direction X of the absorbent core 41 in a plan view of the absorbent core 41 as shown in FIG. 2. The middle middle-high part 42C and a pair of side middle middle-high parts 42S, 42S extending outward in the lateral direction Y from the respective side edges along the longitudinal direction X of the middle middle-high part 42C. Each side middle middle high portion 42S extends from each side edge along the vertical direction X of the middle middle middle high portion 42C to the side edge 41s along the vertical direction X of the absorbent core 41. Although the middle middle high section 42C may be formed only in the middle section B, the absorbent core 41 shown in FIG. 2 extends from the middle section B to a part of the rear section C. On the other hand, the pair of side intermediate middle and high portions 42S, 42S is formed in the intermediate section B. The middle middle high section 42C extending from the middle section B to a part of the rear section C is thicker than the front and rear sections and has a larger basis weight. Moreover, each side middle middle high part 42S is formed with a larger basis weight than the basis weight of the peripheral region 41Ar of the absorbent core 41.

  As shown in FIG. 2, the middle middle-high section 42 </ b> C is a plan view of the absorbent core 41, and the length L <b> 2 in the longitudinal direction X at the center in the lateral direction Y is the length L <b> 1 in the longitudinal direction X of the absorbent core 41. It is shorter and longer than the length in the lateral direction Y. Further, in the middle middle high section 42C, the length L2 in the vertical direction X in the middle section in the lateral direction Y is the length in the vertical direction X of the side edge on the side away from the center line CL of each side middle middle high section 42S. It is formed longer than L4. In addition, each side middle middle high portion 42S has a length in the vertical direction X that is gradually shortened outward in the horizontal direction Y. Specifically, each of the side middle middle and high portions 42S includes an inner side along the vertical direction X on the side close to the center line CL, an outer side along the vertical direction X on the side far from the center line CL, The upper side connecting the upper ends of the outer side and the outer side and the lower side connecting the lower ends of the inner side and the outer side, and the distance (width) between the upper side and the lower side is the horizontal direction. It gradually decreases toward the outside of Y. Thus, each side middle middle high part 42S has a length in the longitudinal direction X from each side edge along the longitudinal direction X of the middle middle middle high part 42C to each side edge along the longitudinal direction X of the absorbent core 41. It has a portion that gradually decreases.

  In the absorbent core 41 shown in FIGS. 2 and 3, the middle middle high portion 42 having the middle middle middle high portion 42 </ b> C and the pair of side middle middle high portions 42 </ b> S and 42 </ b> S has a middle middle high portion groove 43 having a small thickness. . Here, the “thin middle / high groove portion 43” means that the bottom has a thickness even though it is thin in the thickness direction Z, and there is no constituent material of the absorbent core 41 at all and penetrates the absorbent core. This means that the portion is thinner than the other portions in the middle, middle and high portions 42. In the napkin 1, the middle and high part groove part 43 has a basis weight of the bottom part of other areas of the absorbent core 41, specifically, a basis weight of a small absorbent part 46 described later of the first area 41F and the third area 41R. Is lower than.

  In the absorptive core 41 shown in FIGS. 2 and 3, the middle-high groove portion 43 has an outer peripheral middle-high boundary groove portion 43 a that extends along the contour of the middle middle-high portion 42. The outer periphery middle / high boundary groove 43a is formed along the contours of the center middle middle / high portion 42C and the pair of side middle middle / high portions 42S and 42S. In the napkin 1, as shown in FIG. 2, the middle middle high section 42 C of the middle middle high section 42 is surrounded by the middle high section groove section 43 having a relatively low basis weight and the middle high section groove section 43 having a relatively high basis weight. A block structure having a plurality of middle, high, and small absorbing portions 43k has a plurality of block regions arranged in the vertical direction X. Further, the pair of lateral middle middle and high portions 42S and 42S of the middle middle and high portion 42 has a plurality of middle and middle portion small portions surrounded by the middle and high portion groove portions 43 having a relatively low basis weight and a middle and high portion groove portion 43 having a relatively low basis weight. It has a block structure having an absorption part 43k.

  In addition to the outer peripheral middle / high boundary groove 43a, the middle middle / high section 42 has a middle middle / high section groove 43a, a middle middle / high section groove 43y extending in the transverse direction Y of the absorbent core 41, and a middle vertical section groove section extending in the longitudinal direction X of the absorbent core 41. 43x. The horizontal middle and high groove portion 43y is formed in a straight line continuously with a part of the horizontal groove 45Y extending in the horizontal direction Y arranged in the first region 41F and the third region 41R of the absorbent core 41. Further, the vertical middle and high groove portion 43x is formed in a straight line continuously with a part of the vertical groove 45X extending in the vertical direction X arranged in the first region 41F and the third region 41R of the absorbent core 41. The middle and high groove portions 43 of the absorbent core 41 are open to the skin facing surface side, like the horizontal grooves 45Y and the vertical grooves 45X.

  In the napkin 1, the rear middle high portion 47 arranged in the central portion in the lateral direction Y in the third region 41R is formed in a rectangular parallelepiped shape that is long in the longitudinal direction X, as shown in FIGS. It is surrounded by a vertical groove 45X, a horizontal groove 45Y, and a horizontal middle and high spacing groove portion 48y described later, which are arranged in the region 41R. The rear middle high portion 47 is thicker than the thickness in the peripheral region 41Ar of the absorbent core 41, and has a larger basis weight than the basis weight of the peripheral region 41Ar of the absorbent core 41. As shown in FIG. 2, the rear middle high portion 47 has a length in the horizontal direction Y shorter than a length in the horizontal direction Y of the middle middle high portion 42 and a length in the vertical direction X in the vertical direction X of the middle middle high portion 42. It is shorter than the length.

  In the napkin 1, the middle middle-high portion 42 and the rear middle-high portion 47 are separated from each other via a middle-high gap region 42D. Preferably, the middle middle-high portion 42 and the rear middle-high portion 47 are spaced apart in the longitudinal direction X, and the absorbent core 41 has the middle middle-high portion 42 and the rear middle as shown in FIGS. A mid-high space region 41 </ b> D is provided between the mid-high portion 47. The middle-high interval region 41D is disposed in the peripheral region 41Ar. In the napkin 1, the middle-high interval region 41 </ b> D is located between the middle middle-high portion 42 extending over a part of the rear section C and the rear middle-high section disposed in the rear section C. That is, the middle-high interval region 41D is located in the rear section C.

  In the middle / high spacing region 41D of the absorbent core 41, a thin middle / high spacing groove portion 48 is provided. Here, the “thin middle- and high-interval groove portion 48” means that the bottom has a thickness even though it is thin in the thickness direction Z, and does not pass through the absorbent core without any constituent material of the absorbent core. This means that the portion is thinner than the other portions in the middle, middle and high portions 42. In the napkin 1, the middle and high gap grooves 48 are formed to have a smaller basis weight than the peripheral region 41 Ar of the absorbent core 41. Specifically, the basis weight of the bottom portions of the middle and high interval groove portions 48 is formed to be smaller than the basis weight of the small absorption portions 46 described later of the first region 41F and the third region 41R. The middle / high spacing groove 48 includes a horizontal middle / high spacing groove 48 y extending in the lateral direction Y of the absorbent core 41 and a vertical middle / high spacing groove 48 x extending in the longitudinal direction X of the absorbent core 41. The lateral middle and high spacing groove portions 48y extend in the lateral direction Y of the absorbent core 41, and are arranged at positions in contact with the rear end of the middle middle high portion 42 in the longitudinal direction X and the rear middle high portion 47 in the longitudinal direction X. Yes. The horizontal middle and high spacing groove portions 48y are formed in a straight line parallel to the horizontal grooves 45Y extending in the horizontal direction Y arranged in the third region 41R of the absorbent core 41. The longitudinal middle and high spacing groove portions 48x are formed in a straight line continuously with a part of the longitudinal groove 45X extending in the longitudinal direction X arranged in the third region 41R of the absorbent core 41. The middle and high interval groove portions 48 of the absorbent core 41 are open to the skin facing surface side, like the horizontal grooves 45Y and the vertical grooves 45X.

In the napkin 1, as shown in FIG. 4, the skin-side sheet 2 is higher than the high-convex portion row 21L in which a plurality of high-projection portions 2t1 protruding to the skin-facing surface side are arranged in the horizontal direction and the height of the high-convex portion 2t1. The low convex portion row 22L in which a plurality of low low convex portions 2t2 are arranged in the horizontal direction has the high and low convex portion row regions 49 alternately arranged in the vertical direction, and the high and low convex portion row regions 49 are in the middle and high intervals. It overlaps with the area 41D. Preferably, in the napkin 1, as shown in FIGS. 4 to 6, the napkin 1 is viewed from the skin-facing surface side in a plan view, and the high convexity of the skin-side sheet 2 is positioned so as to overlap with the middle and high spacing regions 41D of the absorbent core 41. The partial rows 21L and the low convex portion rows 22L have high and low convex portion row regions 49 in which the vertical rows X are alternately arranged. In the napkin 1, as shown in FIG. 4, the high convex part 2t1 which protrudes in the skin opposing surface side of the skin side sheet | seat 2 in the position which overlaps with the middle high space area | region 41D of the absorbent core 41 is parallel to the horizontal middle high space groove part 48y. A plurality of high convex portion rows 21L are formed, and a low convex portion row 22L is formed in which a plurality of low convex portions 2t2 are arranged in parallel with the horizontal, middle and high spacing groove portions 48y. In the napkin 1, the high convex portion rows 21L and the low convex portion rows 22L are alternately arranged along the longitudinal, middle and high interval groove portions 48x at positions overlapping the middle and high interval regions 41D of the absorbent core 41. The X direction in the figure is the same as the machine direction (MD direction) and the vertical direction X of the napkin 1 when the skin side sheet 2 is manufactured. Moreover, the Y direction in the figure is the same direction as the direction (CD direction) orthogonal to the machine direction (MD direction) at the time of manufacturing the skin side sheet and the lateral direction Y of the napkin 1. The Z direction in the figure is the thickness direction.

  Further, as shown in FIG. 1, the napkin 1 has a high convex row 21L and a low convex row 22L at positions overlapping with all of the middle middle middle high portion 42C and a part of the pair of side middle middle high portions 42S, 42S. Are alternately arranged in the vertical direction X.

  In the napkin 1, the middle middle high part 42 (the middle middle middle high part 42C and each side middle middle high part 42S) and the rear middle high part 47 have a basis weight that is greater than the basis weight of the peripheral region 41Ar in the absorbent core 41. Is formed high. Preferably, in the napkin 1, as shown in FIG. 3, the middle middle high portion 42 and the rear middle high portion 47 are formed thicker than the peripheral region 41 Ar in the absorbent core 41, and the absorbent core The basis weight of the peripheral region 41Ar in 41 is higher than the basis weight. The thickness and basis weight of the peripheral region 41Ar to be compared with the thickness and basis weight of the middle middle high portion 42 and the rear middle high portion 47 are the groove portions 45 in the peripheral region 41Ar when the groove portion 45 described later is formed in the peripheral region 41Ar. It means the thickness and basis weight in the part where no exists. The absorbent core 41 of the napkin 1 has a thickness difference by providing a difference in the basis weight of the core material. Therefore, unlike the case of providing a thickness difference by compressing a part of the absorbent core having a uniform basis weight. The absorbent core 41 is flexible as a whole.

The thickness of the middle middle high section 42C of the middle middle high section 42 is such that the middle middle middle high section 42C protrudes toward the skin and improves the absorbability of the liquid of the absorbent core 41 while following the body when worn. From the viewpoint of suppressing discomfort, the thickness of the peripheral region 41Ar in the absorbent core 41 is preferably 110% or more and 250% or less, more preferably 120% or more and 220% or less. The thickness of the middle middle middle high portion 42C when the middle middle middle high portion 42C includes the above-described middle high portion groove portion 43 and the like means the thickness of portions other than those groove portions, and the peripheral region compared with the thickness of the middle middle middle high portion 42C. The thickness of 41Ar is preferably a thickness in a portion where no groove portion such as the middle-high portion groove portion 43 exists in the peripheral region 41Ar of the absorbent core 41. The above-described configuration is particularly effective when the middle middle-high portion 42 is provided in the middle section B like the napkin 1 of the present embodiment.
Specifically, the thickness of the middle middle high portion 42 is preferably 3 mm or more and 15 mm or less, more preferably 5 mm or more and 10 mm or less. In addition, it is preferable that the relationship of the above thickness is in the entire range of the middle middle high part 42, but in the case where a gradual increase / decrease is provided in the thickness direction of the middle middle high part 42, in the thickest part What is necessary is just to become said relationship.

From the viewpoint of improving the absorbability of the liquid of the absorbent core 41 by projecting the pair of side intermediate middle high portions 42S and 42S toward the skin, the thickness of each side middle middle high portion 42S of the middle middle high portion 42, It is preferably smaller than the thickness of the central middle middle high portion 42C, and preferably 60% to 99%, more preferably 65% to 95% of the thickness of the middle middle middle high portion 42C. The thickness of each side intermediate middle / high portion 42S in the case where each side middle middle / high portion 42S has the above-described middle / high portion groove portion 43 or the like means the thickness of portions other than those groove portions. The above-described configuration is particularly effective when the middle middle-high portion 42 is provided in the middle section B like the napkin 1 of the present embodiment.
Specifically, it is preferable that the thickness of each side middle middle high portion 42 </ b> S has the above thickness relationship in the entire range of the middle middle high portion 42, but gradually increases or decreases in the thickness direction of the middle middle high portion 42. In such a case, it is only necessary to satisfy the above relationship in the thickest part.

  The thickness of the rear middle high portion 47 is smaller than the thickness of the central middle middle high portion 42C from the viewpoint of improving the fit property to the body (preferably rupture) by projecting the rear middle high portion 47 toward the skin. It is also preferable that the thickness is larger than the thickness of the side intermediate middle / high portion 42S. The thickness of the rear middle-high part 47 is preferably 100% or more and 180% or less, more preferably 100% or more and 150% of the thickness of the side middle middle / high part 42S from the viewpoint of suppressing good followability to the body and a sense of discomfort when worn. % Or less. In addition, it is preferable that the relationship of the above thickness is in the entire range of the middle middle high part 42, but in the case where a gradual increase / decrease is provided in the thickness direction of the middle middle high part 42, in the thickest part What is necessary is just to become said relationship.

  The thickness of the peripheral region 41Ar of the absorbent core 41 is preferably 2.0 mm or greater and 7.0 mm or less, and more preferably 3.0 mm or greater and 6.0 mm or less. In the napkin 1, it is preferable that the thickness of the peripheral region 41Ar of the absorbent core 41 is substantially uniform in a portion where a groove 45 described later does not exist, but in the lateral direction Y or the vertical direction X of the peripheral region 41Ar. In the case where a gradual increase / decrease in thickness is provided, it is sufficient that the above relationship is satisfied in the thickest portion. The thickness of each part of the absorbent core 41 such as the central middle middle and high part 42C, each side middle middle and high part 42S, the rear middle and middle part 47, and the peripheral region 41Ar is measured by the following method.

<Method for measuring thickness of each part of absorbent core 41>
The absorbent core is left in a horizontal place so as not to be wrinkled or bent, and from the absorbent core 41, the center middle middle-high part 42C, the side middle middle-high part 42S, the rear middle-high part 47, or the peripheral region, which is the measurement object Cut out 41Ar and the like. And the thickness under the load of 8 cN / cm < ² > in the cut-out measuring object is measured. Specifically, for example, a thickness gauge PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.) Is used for measuring the thickness. At this time, a planar or square plate (20 mm × 20 mm, thickness) whose size is adjusted so that the load is 8 cN / cm ² between the tip of the thickness meter and the cut object to be measured. A metal plate (about 5 mm) is placed and the thickness is measured. When measuring the thickness of the peripheral region 41Ar and the like in the absorbent core 41, the thickness is measured so as not to include a groove 45 described later.

In the napkin 1, the basis weight of the middle middle high portion 42C of the middle middle high portion 42 in the absorbent core 41 is such that the middle middle middle high portion 42C protrudes toward the skin and absorbs liquid of the absorbent core in the middle section B. From the viewpoint of improving the viscosity, it is preferably 300 g / m ² or more and 900 g / m ² or less, more preferably 450 g / m ² or more and 800 g / m ² or less.

  Moreover, the basic weight of each side middle middle high part 42S of the middle middle high part 42 in the absorptive core 41 makes each side middle middle high part 42S protrude toward the skin, and absorbs the liquid of the absorbent core in the middle area B. From the viewpoint of improving the properties and the like, it is preferably 40% or more and 90% or less, and more preferably 50% or more and 75% or less, of the basis weight of the middle middle high section 42C.

In addition, the basis weight of the rear middle high portion 47 in the absorbent core 41 is preferably 300 g / from the viewpoint of improving the fit to the body (preferably a tear) by projecting the rear middle high portion 47 toward the skin. m ² or more and 800 g / m ² or less, more preferably 400 g / m ² or more and 700 g / m ² or less.

The basis weight of the peripheral region 41Ar in the absorbent core 41 is preferably 100 g / m ² or more and 500 g / m ² or less, more preferably 150 g / m ² or more and 400 g / m ² or less.
The basis weights of the center middle middle high part 42C, each side middle middle high part 42S, and the rear middle high part 47 are the middle middle middle high part 42C cut out as described in the method for measuring the thickness of each part of the absorbent core 41 described above, the side The mass of the sample in the middle middle-high part 42S and the rear middle-high part 47 is obtained by dividing by the area of the surface of the sample facing the skin. The basis weight of the peripheral region 41Ar is obtained by dividing the mass of the sample of the peripheral region 41Ar cut out as described in the method for measuring the thickness of each part of the absorbent core 41 by the area of the surface of the sample facing the skin. And ask. When measuring the basis weight of the peripheral region 41Ar and the like in the absorbent core 41, the measurement is performed so as not to include a groove 45 described later.

The total length L2 of the middle middle high portion 42 in the vertical direction X (the total length in the vertical direction X of the middle middle middle height portion 42C) L2 is preferably 25% or more and 70% or less of the total length L1 of the absorbent core 41 in the vertical direction X. Is 30% or more and 55% or less.
The total length L1 indicates the distance at the longest position in the vertical direction X of the absorbent core 41, and the total length L2 indicates the distance at the longest position in the vertical direction X of the middle middle high part 42 (the vertical direction of the middle middle middle high part 42C). Means the longest distance in X) (see FIG. 2).

  The total length L3 in the longitudinal direction X of the inner side near the center line CL of each side middle middle high section 42S constituting the middle middle high section 42 is preferably the total length L2 of the middle middle middle high section 42C constituting the middle middle high section 42. Is 20% or more and 80% or less, more preferably 30% or more and 60% or less. The total length L3 means the distance even at the longest position in the vertical direction X of each side middle middle-high portion 42S (see FIG. 2).

  The total length L4 in the vertical direction X of the outer side that is away from the center line CL of each side middle middle high portion 42S is preferably 10 times the total length L3 in the vertical direction X of the inner side side of each side middle middle high portion 42S. % To 70%, more preferably 20% to 60%.

  In the napkin 1, the groove widths of the middle and high portion groove portions 43 (the outer periphery middle and high boundary groove portions 43a, the vertical middle and high portion groove portions 43x, and the horizontal middle and high portion groove portions 43y) of the absorbent core 41 are improved from the viewpoint of improving the liquid absorbency and the like in the intermediate section B Therefore, it is preferably 0.1 mm or more and 5.0 mm or less, and more preferably 0.5 mm or more and 3.0 mm or less. In addition, the groove width of the middle-high part groove part 43 and the thickness to be described later are cut in a direction orthogonal to the extending direction of the middle-high part groove part 43 and measured from a photograph of the cut end face. In the napkin 1, the thickness of the middle and high groove portions 43 in the absorbent core 41 is preferably 0.08 mm or greater and 7.0 mm or less, more preferably 0, from the viewpoint of improving the liquid absorbency and the like in the intermediate zone B. .15 mm or more and 3.5 mm or less.

In the napkin 1, the mid-high groove portion 43 is formed so that the basis weight is lower than the basis weight of the intermediate middle-high portion 42, and further, the basis weight is lower than the basis weight of the peripheral region 41 Ar in the absorbent core 41. Here, the basis weight of the peripheral region 41Ar means the basis weight of the portion excluding the groove 45 when the groove 45 is provided. The basis weight of the mid-high groove portion 43 is preferably 10 g / m ² or more and 350 g / m ² or less, more preferably 20 g / m ² or more and 250 g / m ² or less. In addition, the basic weight of the middle-high part groove part 43 is the skin facing surface side of the sample of the sample of the part of the middle-high part groove part 43 cut out as demonstrated by the measuring method of the thickness of each part of the absorbent core 41 mentioned above. Divide by the area of the surface.

  In the napkin 1, as shown in FIG. 2, the peripheral region 41Ar of the absorbent core 41 includes a groove portion 45 having a basis weight smaller than that of the periphery, and the groove portion 45 extends in the vertical direction 45X extending in the vertical direction X and in the horizontal direction Y. And a horizontal groove 45Y. In the napkin 1, the peripheral area 41Ar has a groove portion 45 having a relatively small basis weight and a small absorbing portion 46 having a relatively large basis weight. Preferably, the groove 45 includes a vertical groove 45X extending in the vertical direction X and a horizontal groove 45Y extending in the horizontal direction Y. The vertical grooves 45X extending in the vertical direction X are arranged with a constant interval in the horizontal direction Y, and the horizontal grooves 45Y extending in the horizontal direction Y are arranged with a constant interval in the vertical direction X. The small absorbing portions 46 are disposed at positions of the grids defined by the vertical grooves 45X and the horizontal grooves 45Y and at positions adjacent to the intermediate middle and high portions 42. The thickness and basis weight of the peripheral region 41Ar described above mean the thickness and basis weight of the small absorbent portion 46.

  In the napkin 1, the absorbent core 41 has a groove portion 45 and a small absorbent portion 46 in the peripheral region 41Ar, and has a middle middle high portion 42, a middle high portion groove portion 43, and a rear middle high portion 47 in the second region 41M and the third region 41R. The whole is integrally molded. “Integrally molded” means that the same material is used to form parts in one process, unlike the case where members manufactured in different processes are joined by means of bonding, such as adhesives or compression. Means that

In the napkin 1, the groove width of the groove part 45 in the absorbent core 41 is preferably 0.1 mm or more and 5 mm or less, more preferably 0.5 mm or more and 3 mm or less from the viewpoint of followability and diffusibility of the body fluid in the planar direction. . In the napkin 1, the thickness of the groove 45 in the absorbent core 41 is preferably 5% to 65% with respect to the thickness of the peripheral region 41Ar other than the groove 45 from the viewpoint of flexibility and diffusibility of the body fluid in the plane direction. More preferably, it is 5% to 45%. In addition, the groove width of the groove part 45 and the thickness mentioned later are cut | disconnected in the direction orthogonal to the extending direction of the groove part 45, and are measured from the photograph of a cut end surface. The basis weight of the groove 45 is preferably 5 to 95% with respect to the peripheral region 41Ar. In addition, the basic weight of the groove part 45 is the area of the surface by the side of the skin facing surface of the sample of the part of the groove part 45 cut out as demonstrated by the measuring method of the thickness of each part of the absorptive core 41 mentioned above. Divide by to find.
In the napkin 1, the groove width, thickness, and basis weight of the middle and high spacing groove portions 48 are the same as those of the groove portions 45.

The absorbent core 41 of the napkin 1 described above includes, for example, a stacking drum 54 that includes an accumulation recess 55 on the outer peripheral surface and rotates in one direction R, as shown in FIG. 7A, and the stacking drum 54. It can manufacture using the fiber pile apparatus provided with the duct (not shown) which supplies a core material in a scattering state to the outer peripheral surface.
A plurality of stacking recesses 55 are formed at regular intervals in the circumferential direction of the outer peripheral surface of the stacking drum 54. The bottom surface 56 of the accumulation recess 55 is made of a mesh plate or the like and has a large number of pores functioning as suction holes.

  Further, as shown in FIG. 7A, two concave portions 56 b and 56 c for forming the middle middle high portion 42 and the rear middle high portion 47 are formed in a part of the bottom surface 56 of the concave portion 55 for accumulation. . Further, at the bottom of the concave portion 56b, the depth is different between the portion forming the center middle middle high portion 42C and the portion forming the pair of side middle middle high portions 42S, 42S. 42C and a pair of side middle middle and high portions 42S and 42S are formed with a breathable member 57 for forming the groove portions 43 and 48 and the middle middle and middle portions 42C and the middle and middle portions between the pair of side middle middle and high portions 42S and 42S. A similar breathable member for forming the groove 43 is arranged. Further, a non-breathable member 58 for forming the groove 45 is formed on the bottom surface 56 of the accumulation recess 55 other than the recesses 56b and 56c. The non-breathable members 57 and 58 are fixed so as to protrude from the bottom surface of the accumulation recess 55, and may be non-breathable members, for example, made of metal, plastic, ceramic, or the like.

  Similarly to the known fiber-stacking device provided with the fiber-synthesizing drum, the core material in which the water-absorbing polymer and the pulp fiber are mixed is supplied into the duct while sucking from the bottom surface of the concave portion 55 for accumulation. As shown in (b), the core material is deposited in a predetermined shape in the recesses 55 for accumulation. The precursor of the absorbent core 41 is obtained by releasing the deposit 40 from the accumulation recess 55. The precursor of the absorbent core 41 is covered with a core wrap sheet (not shown), then cut with a rotary cutter or the like, and conveyed in a conveying direction by a conveying means such as a belt conveyor. Thus, the absorptive core 41 is obtained. The absorbent core 41 covered with the core wrap sheet (not shown) obtained in this manner is compressed in an appropriate manner by pressurizing the whole or a part, for example, by passing it between a pair of rolls once or a plurality of times. . Thereby, the part accumulated in the recessed part 56b becomes the middle middle high part 42 in which both basic weight and thickness are relatively large. Similarly, the portion made of the core material deposited in the upstream region and the downstream region adjacent to the recess 56b becomes the first region 41F and the third region 41R in the absorbent core 41 having a relatively small basis weight. Further, the portion made of the core material deposited on the first non-breathable member 57 of the recess 56b becomes the middle and high groove portion 43 that is relatively smaller than the basis weight of the first region 41F and the basis weight of the third region 41R. . The portion made of the core material deposited on the second non-breathable member 58 in the upstream region and the downstream region adjacent to the recess 56 b becomes the groove portion 45 that is relatively smaller than the basis weight of the small absorbent portion 46.

In the napkin 1, the skin side sheet 2 has a plurality of large polygonal regions BT surrounded by a plurality of embossed portions 2E, as shown in FIG. 8, and the embossed portions 2E form the tops of the large polygonal regions BT. In each large polygonal region BT, a high convex portion 2t1 having a relatively high height is formed. The skin-side sheet has a plurality of small polygon regions ST having a smaller area than the large polygon region BT surrounded by the embossed portions 2E forming the tops of the plurality of large polygon regions BT. It also forms the top of the square region ST. And in each small polygon area | region ST, the low convex part 2t2 whose height is lower than the high convex part 2t1 is formed.

  Specifically, in the skin side sheet 2 of the napkin 1, the large polygonal region BT is surrounded by six embossed portions 2E forming the top as shown in FIG. 8, and the outer shape is a hexagonal shape. Yes. On the other hand, as shown in FIG. 8, the small polygonal region ST is surrounded by four embossed portions 2E forming the top, and the outer shape is a square shape.

  In the skin side sheet 2, as shown in FIG. 8, a large polygon region row BTL configured by a plurality of large polygon regions BT being arranged adjacent to each other along the horizontal direction Y is formed, and the inside of the large polygon region BT A plurality of high convex portions 2t1 are arranged along the horizontal direction Y to form a high convex portion row 21L. Further, in the skin side sheet 2, a small polygon region row STL formed by arranging a plurality of small polygon regions ST adjacent to each other along the lateral direction Y is formed, and the low polygon region ST in the small polygon region ST is formed. A plurality of convex portions 2t2 are arranged along the horizontal direction Y to form a low convex portion row 22L. The large polygon region row BTL and the small polygon region row STL are alternately arranged in the vertical direction X orthogonal to the horizontal direction Y. That is, along the vertical direction X, the high convex portion rows 21L, the low convex portion rows 22L, the high convex portion rows 21L,.

  In the skin-side sheet 2 of the napkin 1, as shown in FIG. 8, the embossed portion 2E is between the two high convex portions 2t1 and 2t1 that are closest to each other in the longitudinal direction X and in the lateral direction Y. An intermediate embossed portion 2E1 is provided between the two low convex portions 2t2 and 2t2 located at the closest positions. In the skin-side sheet 2, the plurality of embossed portions 2E are composed of two types of intermediate embossed portions 2E1 and the remaining other embossed portions 2E2 excluding the intermediate embossed portions 2E1. In the present specification, “one embossed portion” means an embossed shape that can be regarded as one in appearance, and even if the embossed portion is composed of a plurality of dots or broken lines, "Embossed part of". In the napkin 1, the intermediate embossed portion 2E1 is formed in an X shape, and each other embossed portion 2E2 is formed in a Y shape as shown in FIG.

Each embossed part 2E (intermediate embossed part 2E1 and other embossed part 2E2) has one embossed part 2E (intermediate embossed part) from the viewpoint of enhancing the drawability and diffusibility of the liquid in the skin side sheet 2 while maintaining a good touch. The area of the portion 2E1 and the other embossed portion 2E2 is preferably 1 mm ² or more and 15 mm ² or less, and more preferably 1.5 mm ² or more and 12 mm ² or less.

  In the embossed portion 2E (intermediate embossed portion 2E1 and other embossed portion 2E2), the constituent fibers of the skin side sheet 2 are consolidated. The ratio of the area of the embossed portion 2E to the total area of the skin side sheet, that is, the embossing rate, is preferably 5% or more and 30% or less from the viewpoint of body fluid drawability and texture, and particularly 7% or more and 20% or less. Is preferred. According to the embossing pattern in the skin-side sheet 2, even with such a low embossing rate, the contact area with the wearer's skin can be reduced.

  In the skin side sheet 2 formed as described above, as shown in FIG. 8, the high convex portion 2t1 formed in the hexagonal large polygonal region BT is a convex portion having an elliptical planar shape, and has a rectangular shape. The low convex part 2t2 formed in each small polygon area | region ST is a convex part with a circular planar shape.

  The height hb (see FIG. 9) at the apex in the thickness direction (Z direction) of the high convex portion 2t1 is a viewpoint that the skin-side sheet 2 has a good touch and enhances the density gradient of the fibers to enhance the liquid drawability. Therefore, it is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 5.0 mm or less. Further, the bulging angle θ3 (see FIG. 10) from the bottom surface of the high convex portion 2t1 is 70 ° or more and 90 ° or less from the viewpoint of making it difficult to leave menstrual blood in a portion that touches the skin even during a large amount of menstrual blood. It is more preferable that it is 75 ° or more and 85 ° or less.

The height hs (see FIG. 11) at the apex in the thickness direction (Z direction) of the low convex portion 2t2 enhances the good touch feeling of the skin side sheet 2 and enhances the density gradient of the fibers to increase the drawability of the liquid. From the viewpoint, it is preferably 0.4 mm or more and 4.5 mm or less, and more preferably 0.8 mm or more and 2.5 mm or less.
In addition, the rising angle θ4 (see FIG. 11) from the bottom surface of the low convex portion 2t2 is 25 ° or more and 70 ° or less from the viewpoint of making it difficult to leave menstrual blood in a portion that touches the skin even during a large amount of menstrual blood. It is more preferable that it is 30 ° or more and 65 ° or less. The ridge angle θ4 is measured simultaneously with the measurement of the height hs.

  As shown in FIGS. 9 to 11, the skin-side sheet 2 includes a non-heat-shrinkable fiber layer 2u containing non-heat-shrinkable fibers on the skin facing surface side and heat-shrinkable fibers heat-shrinked on the non-skin facing surface side. The heat shrinkable fiber layer 2d is included. The heat-shrinkable fiber layer 2d and the non-heat-shrinkable fiber layer 2u of the skin side sheet 2 are joined intermittently by a plurality of embossed portions 2E. Specifically, in the skin-side sheet 2, the heat-shrinkable fiber layer 2d and the non-heat-shrinkable fiber layer 2u are partially bonded and bonded together by a plurality of regularly arranged embossed portions 2E. The heat-shrinkable fibers of the heat-shrinkable fiber layer 2d on the skin facing surface side are formed by heat-shrinking. As shown in FIGS. 9 to 11, the skin-side sheet 2 includes a plurality of recesses recessed by an embossed part 2 </ b> E embossed from the skin-facing surface side of the non-heat-shrinkable fiber layer 2 u, and a non-embossed non-embossed part. A plurality of convex portions 2t are formed. And the convex part 2t has the some high convex part 2t1 and the some low convex part 2t2. The high convex portion 2t1 and the low convex portion 2t2 are composed of the non-heat-shrinkable fiber layer 2u of the first layer 2u, and are filled with the same fibers constituting the non-heat-shrinkable fiber layer 2u.

  In the skin side sheet 2, the fiber density of the low convex part 2t2 is higher than the fiber density of the high convex part 2t1. Further, the fiber density of the fibers constituting the heat-shrinkable fiber layer 2d of the second layer 2d is higher than the fiber density of the fibers of the non-heat-shrinkable fiber layer 2u of the first layer 2u constituting the low convex portion 2t2. . Preferably, the fiber density of the high convex portion 2t1 of the three-dimensional dome structure is lower than the fiber density of the low convex portion 2t2 of the three-dimensional dome structure, and in particular, the vertex in the Z direction (reference point of the height hb). In the skin side sheet 2, it is the lowest. The low convex portion 2t2 of the three-dimensional dome structure has the lowest fiber density among the low convex portions 2t2 at the apex in the Z direction (reference point of the height hs).

  Ratio (db / ds) of the fiber density db at the apex in the Z direction (reference point for height hb) of the high convex part 2t1 to the fiber density ds at the apex in the Z direction (reference point for height hs) of the low convex part 2t2. ) Is preferably 1.2 times or more and 3.0 times or less, and more preferably 1.5 times or more and 2.5 times or less, from the viewpoint of enhancing the drawability of excreted body fluid.

  The ratio of the fiber density of the skin side sheet 2 can be measured by the method described in paragraphs [0042] to [0046] of JP-A No. 2015-186543.

  About the formation material of the skin side sheet | seat 2, description as described in Paragraph [0047] thru | or [0053] of Unexamined-Japanese-Patent No. 2015-186543 can be used.

The basis weight of the skin-side sheet 2 is preferably 20 g / m ² or more and 100 g / m ² or less, and more preferably 35 g / m ² or more and 80 g / m ² or less.
The contact area between the skin-side sheet 2 and the wearer's skin is preferably 45% or less, particularly 42% or less for the above-mentioned reason, and the lower limit is preferably 25% or more, particularly preferably 30% or more.

  Further, as shown in FIG. 2, the skin side sheet 2 is formed by disposing the non-heat-shrinkable fiber layer 2u on the skin facing surface side and the heat-shrinkable fiber layer 2d on the non-skin facing surface side. Therefore, toward the heat-shrinkable fiber layer 2d in which the fiber density has increased due to shrinkage, the excreted body fluid is quickly drawn from the skin-facing surface side to the non-skin-facing surface side by capillary force, and the effect of reducing stuffiness is achieved. .

As the forming material of each constituent member of the napkin 1 of the present embodiment described above, those known in the technical field can be used. The non-skin-side sheet 3 preferably has poor liquid permeability or impermeability, preferably has a basis weight of 10 to 50 g / m ² and a thickness of 8 to 200 μm. Pulp fibers and water-absorbing polymers can be used for the core material of the absorbent core 41. Moreover, you may mix | blend a deodorizer, an antibacterial agent, etc. with the absorptive core 41 as needed. When a core wrap sheet (not shown) that covers the absorbent core 41 is used, tissue paper, a water-permeable nonwoven fabric, or the like can be used. As the side sheet 5, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used.

  According to the napkin 1 described above, as shown in FIGS. 1 and 2, the absorbent core 41 is between the first region 41F located on the front section A side and the third region 41R located on the rear section C side. It has a middle middle-high portion 42 disposed in the second region 41M and a rear middle-high portion 47 disposed in the third region 41R. Therefore, when the napkin 1 is worn, the portions corresponding to the middle middle-high portion 42 and the rear middle-high portion 47 project toward the skin so that the body deforms along the wearer's body, and the fit is improved. Absorbs body fluids such as blood. Also, as shown in FIG. 4, the middle middle-high portion 42 and the rear middle-high portion 47 are separated from each other via a middle-high spacing region 41D, and the skin-side sheet 2 is a high convex protruding toward the skin facing surface side. A vertical line X includes a high convex line 21L in which a plurality of parts 2t1 are arranged in the horizontal direction Y and a low convex part line 22L in which a plurality of low convex parts 2t2 having a height lower than the high convex part 2t1 are arranged in the horizontal direction Y. It has the high and low convex part row area 49 arranged alternately, and the high and low convex part row area 49 overlaps with the middle and high interval area 41D. Therefore, for example, when the napkin 1 is worn and the middle middle high part 42 and the rear middle high part 47 are deformed along the wearer's body, the high convex row 21L fits the wearer's skin in the middle / high spacing region 41D. Then, a space is formed on the low convex portion row 22L between the adjacent high convex portion rows 21L. Thereby, since the air flow path is formed along the lateral direction Y while fitting to the skin of the wearer and the air permeability is maintained, the sticky feeling and the stuffiness when worn can be reduced. As described above, the napkin 1 has a sufficient fit, and has a feeling of stickiness and a feeling of stuffiness at the time of wearing and excellent wearing feeling.

  Moreover, in the napkin 1, as shown in FIGS. 9-11, the high convex part 2t1 and the low convex part 2t2 of the skin side sheet 2 are satisfy | filled with the same fiber which comprises the non-heat-shrinkable fiber layer 2u. . Moreover, the fiber density of the low convex part 2t2 is higher than the fiber density of the high convex part 2t1. Therefore, the excreted bodily fluid easily shifts from the high convex portion 2t1 in contact with the wearer's skin to the high density low convex portion 2t2 side, and the bodily fluid excreted in the skin side sheet 2 is in the lateral direction Y. It is easier to spread at a moderate speed. In particular, in the napkin 1, the fiber density of the fibers constituting the heat-shrinkable fiber layer 2d of the second layer 2d is higher than the fiber density of the fibers of the non-heat-shrinkable fiber layer 2u of the first layer 2u constituting the low convex portion 2t2. Therefore, the bodily fluid excreted by the skin side sheet 2 by the heat-shrinkable fiber layer 2d of the second layer 2d can be spread in the lateral direction Y at an appropriate speed. Since the non-heat-shrinkable fiber layer 2u of the first layer 2u contains non-heat-shrinkable fibers and the heat-shrinkable fiber layer 2d of the second layer 2d contains heat-shrinkable fibers, the second layer 2d The body fluid excreted in the skin-side sheet 2 by the heat-shrinkable fiber layer 2d can be further spread in the lateral direction Y at an appropriate speed.

  Moreover, in the napkin 1, as shown in FIG.2 and FIG.4, the horizontal middle high space | interval groove part 48y which has a basis weight smaller than the circumference | surroundings and extends in the horizontal direction Y is distribute | arranged to 41D of middle high space area | regions. Therefore, since it becomes easy to bend in the vertical direction X with the horizontal middle and high gap groove portion 48y as the base end, the absorbent core 41 can be easily deformed along the wearer's body, and the fit can be improved.

  Further, as shown in FIGS. 2 and 4, the horizontal middle / high spacing groove portion 48 y arranged in the middle / high spacing region 41 </ b> D contacts the rear end of the middle middle / high portion 42 in the longitudinal direction X or the longitudinal tip of the rear middle / high portion 47. Arranged in position. In the napkin 1, the napkin 1 is disposed at a position in contact with the rear end in the vertical direction X of the middle middle high portion 42 and the front end in the vertical direction of the rear middle high portion 47. For this reason, the absorbent core is more easily bent in the longitudinal direction X at the rear end of the middle middle high portion 42 in the vertical direction X and the rear end of the rear middle high portion 47, and the fitting property can be further improved.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, the absorbent article of this invention is not restrict | limited to the napkin 1 of this embodiment at all, and can be changed suitably.

  The entire absorbent core 41 of the napkin 1 is integrally formed, but instead, it is formed of the core material at the same height from the first region 41F to the third region 41R, and then Alternatively, a high basis weight portion may be formed by disposing another core material.

1 Sanitary napkin (absorbent article)
A front area B middle area C rear area 2 skin side sheet 2t convex part 2t1 high convex part 21L high convex part row 2t2 low convex part 22L low convex part row 2u 1st layer (non-heat-shrinkable fiber layer)
2d second layer (heat-shrinkable fiber layer)
2E Embossed portion 3 Non-skin side sheet 4 Absorber 41 Absorbent core 41F Absorbent core first region 41M Absorbent core second region 41R Absorbent core third region 41D Absorbent core middle to high spacing region 41Ar Absorbent Core peripheral area 42 Middle middle high section 42C Central middle middle high section 42S Lateral middle middle high section 43 Middle high section groove section 45 Groove section 46 Small absorption section 47 Rear middle high section 48 Middle high spacing groove section 49 High and low convex section row area

Claims (6)

A skin-side sheet, a non-skin-side sheet, and an absorbent core interposed between the two sheets, and having a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction perpendicular to the longitudinal direction, An absorbent article having a front area and a rear area,
The absorbent core has a second region between a first region located on the front region side and a third region located on the rear region side, and the absorbent core is disposed at a lateral central portion of the second region. It has a middle, middle and high part having a thickness larger than that of the front and rear parts, and a rear middle and high part having a thickness larger than that of the front and rear parts in the central portion in the lateral direction in the third region,
The middle middle high part and the rear middle high part are separated from each other through a middle high spacing region,
The skin side sheet includes a plurality of high convex portions arranged in the horizontal direction and a plurality of high convex portions protruding to the skin facing surface side, and a plurality of low convex portions lower in height than the high convex portions in the horizontal direction. Convex part rows have high and low convex part row regions arranged alternately in the vertical direction,
The absorptive article in which the high and low convex part row area has overlapped with the middle and high space area.   The absorbent article according to claim 1, wherein the high convex portion and the low convex portion of the skin side sheet are filled with fibers, and the fiber density of the low convex portions is higher than the fiber density of the high convex portions. .   The absorptive article according to claim 1 or 2 in which said middle-high space area in said absorptive core is arranged with the horizontal middle-high gap groove part which is smaller in basis weight than the circumference, and extends in the transverse direction.   The absorptive article according to claim 3 in which said horizontal middle high interval slot is arranged in the position which touches the longitudinal rear end of said middle middle high part, or the longitudinal tip of said back middle high part.   The skin-side sheet is formed by laminating a first layer located on the skin-facing surface side and a second layer located on the absorbent core side, and the first layer comprises the high convex portion and the low convex portion. The fiber density of the fiber which comprises a convex part and comprises the said 2nd layer is higher than the fiber density of the fiber of the said 1st layer which comprises this low convex part in any one of Claims 1-4. The absorbent article as described.   The absorbent article according to claim 5, wherein the fibers constituting the first layer include non-heat-shrinkable fibers, and the fibers constituting the second layer include heat-shrinkable fibers.

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