JP2019024947A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which can realize excellent wear feeling by high fitness and cushion properties and reduce stuffiness when worn.SOLUTION: An absorbent article 1 includes an absorbent core 40 and has a front area A and a back area C. The absorbent core 40 has a second region 40M between a first region 40F positioned on the front area A side and a third region 40R positioned on the back area C side, and the second region 40M and the third region 40R are provided with an intermediate high basic weight part 41 and a rear high basic weight part 44 of greater basic weight than basic weight on the first region 40F side. The intermediate high basic weight part 41 and the rear high basic weight part 44 are separated from each other via a high basic weight part interval region 45 positioned between both high basic weight parts. At least either the intermediate high basic weight part 41 and the rear high basic weight part 44 projects to a non-skin side sheet 3 side.SELECTED DRAWING: Figure 1

Description

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

  From the viewpoint of improving fit to the body and preventing leakage of liquids, for absorbent articles such as sanitary napkins, a high basis weight part having a large basis weight is provided in the central part of the absorbent core of the absorbent article Has been proposed. For example, the applicant firstly has a portion thicker than the thickness in the peripheral region of the absorbent core in each of the central portion in the width direction in the excretory portion facing portion of the absorbent core and the central portion in the width direction in the rear portion. Has proposed an absorbent article (Patent Document 1). In addition, the applicant previously has a thick part thick in the region disposed in the center part in the width direction in each of the excretory part facing part and the rear part of the absorbent core. A promising article is proposed (Patent Document 2). As for the absorbent article of patent document 1 or 2, it is illustrated that the two high basic weight parts with thick thickness are arranged spaced apart in the front-back direction.

  In addition, the present applicant has previously proposed an absorbent article having a region having a larger thickness than other portions on the central side in the width direction of the excretory portion-facing portion (Patent Document 3). As for the absorbent article of patent document 3, the area | region where the said thickness is large protrudes in the non-skin side sheet | seat side.

Japanese Patent Laying-Open No. 2015-097715 JP, 2015-097716, A JP 2006-068772 A

  The absorbent articles described in Patent Documents 1 to 3 have a high basis weight part, so that good fit is achieved, but the improvement in the steaming that can occur in the high basis weight part with high absorption performance and its periphery. There was room.

  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 each of the second region and the third region is provided with an intermediate high basis weight portion and a rear high basis weight portion having a larger basis weight than the basis weight on the first region side, The intermediate high basis weight part and the rear high basis weight part are separated from each other via a high basis weight part spacing region located between the two high basis weight parts, and the intermediate high basis weight part and the rear high basis weight part. At least one of the basis weight parts provides an absorbent article that protrudes toward the non-skin side sheet.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to express a favorable mounting feeling with high fitting property and cushioning property, the stuffiness at the time of wear can be reduced.

FIG. 1 is a plan view showing a sanitary napkin which is a preferred embodiment of the absorbent article of the present invention. FIG. 2 is a perspective view of the non-skin facing surface side of the absorbent core of the sanitary napkin shown in FIG. Fig.3 (a) is sectional drawing which shows the III-III sectional view typically of FIG. 1, FIG.3 (b) and (c) are the figures of other embodiment of the absorptive core which concerns on this invention. FIG. 3 is a diagram corresponding to (a). FIG. 4 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 5 is a sectional view schematically showing a section taken along line II-II in FIG. 6 is a plan view schematically showing a non-skin facing surface side in the absorbent core shown 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. 9 is a cross-sectional view schematically showing a cross section taken along line WW shown in FIG. 10 is a cross-sectional view schematically showing a cross section taken along line XI-XI shown in FIG. 11 is a cross-sectional view schematically showing a cross section taken along line XII-XII 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. And has a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal to the longitudinal direction X, and has 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 includes an intermediate area B including a portion disposed opposite to a wearer's liquid excretion part (such as a vaginal opening) when worn, and the wearer's abdomen (front side) from the intermediate area B. ) And a rear section C 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 absorbent body 4 includes an absorbent core 40 and a core wrap sheet (not shown) that wraps the absorbent core 40.

  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 side flap portion 1 </ b> S 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 pair of side sheets 5 and 5 are joined to the skin-side sheet 2 by corrugated joining portions 6 as shown in FIG. 1. A space portion where the side sheet 5 and the skin side sheet 2 are not joined is formed inward of the lateral direction Y outer end of the joint portion 6, and the space portion flows from the center in the lateral direction Y to the outside. Body fluid such as blood can be accommodated, and leakage of body fluid can be further suppressed.

  In the napkin 1, as shown in FIG. 1, the side flap portion 1S is greatly projected outward in the lateral direction Y in the intermediate section B, whereby the napkin 1 is located on both the left and right sides along the longitudinal direction X. A pair of wing portions 1W and 1W 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, as shown in FIG. 1, the skin side sheet 2 and the absorbent core 40 are compressed and integrated, and the skin side sheet 2 and the absorbent body 4 are non-skin side sheets on the skin facing surface of the skin side sheet 2. A linear squeezing groove 7 is formed which is recessed integrally toward the side 3. In the napkin 1, as shown in FIG. 1, the linear compressed groove 7 includes a lateral compressed groove 71 extending in the lateral direction Y in each of the front section A and the rear section C of the absorbent body 4 and an intermediate section B of the absorbent body 4. It has the vertical pressing groove 73 extended in the vertical direction X in the both sides along the vertical direction X, and becomes a cyclic | annular all-around groove | channel as a whole. In addition, as long as the linear pressing groove 7 is extended linearly, the thickness of the bottom part of a groove | channel may be constant, and the thickness of the bottom part of a groove | channel may not be constant. In the linear compressed groove 7, with respect to the skin-side sheet 2 and the absorbent body 4, the density of each fiber that is a constituent member is higher than the density of the peripheral portion of the linear compressed groove 7. The linear compressed grooves 7 formed in the ring-shaped circumferential groove can further suppress the diffusion of body fluid in the planar direction of the absorbent body 4, and can further suppress liquid leakage from the periphery of the napkin 1.

In the napkin 1, the absorbent core 40 constituting the absorbent body 4 includes a first region 40F located on the front section A side in the longitudinal direction X and a third region 40R located on the rear section C side, as shown in FIG. And has a second region 40M between the first region 40F and the third region 40R. In the napkin 1 of the present embodiment, the second region 40M of the absorbent core 40 is disposed in the intermediate section B. Hereinafter, in the absorbent core 40, the first region 40F side in the longitudinal direction X is also referred to as a front side, and the third region 40R side is also referred to as a rear side.
When the pair of wing portions 1W are provided on both outer sides in the lateral direction Y like the napkin 1, the second region is located between the roots of the wing portions 1W arranged at intervals in the longitudinal direction X in each wing portion 1W. 40M exists.

The absorbent core 40 includes an intermediate high basis weight portion 41 and a rear high basis weight portion 44 having a larger basis weight than the basis weight on the first region 40F side in the second region 40M and the third region 40R, respectively. .
The middle high basis weight portion 41 in the present embodiment has a middle middle high basis weight portion 41C having a vertically long shape in the longitudinal direction X of the absorbent core 40 and both side edges along the longitudinal direction X of the middle middle high basis weight portion 41C. Side intermediate high basis weight portions 41S and 41S extending from the respective sides Y outward and extending to both side edges along the longitudinal direction X of the absorbent core 40 are provided. The central middle high basis weight portion 41C may be formed only in the middle section B, or may extend from the middle section B to a part of the rear section C as shown in FIG. A pair of side intermediate high basis weight portions 41S, 41S are formed in the intermediate section B. The central intermediate high basis weight portion 41C and the lateral intermediate high basis weight portion 41S extending from the intermediate section B to a part of the rear section C have a larger basis weight than the basis weight on the first region 40F side. As shown in FIG. 2, the intermediate high basic weight portion 41 having the central intermediate high basic weight portion 41 </ b> C and the pair of lateral intermediate high basic weight portions 41 </ b> S and 41 </ b> S is the length in the vertical direction X at the central portion in the horizontal direction Y. However, it is formed longer than the length in the vertical direction X of the side edge 42 s of the intermediate high basis weight portion 41.
The rear high basis weight portion 44 in the present embodiment has an elongated shape that is long in the longitudinal direction X of the absorbent core 40. As shown in FIG. 2, the rear high basis weight portion 44 is shorter in the longitudinal direction X of the absorbent core 40 than the third region 40 </ b> R, and the rear high basis weight portion 44 has a rear end 44 </ b> R. The third region 40R in the vertical direction X is located inward in the vertical direction X from the rear end R1. The rear high basis weight portion 44 may have a rear end 44R extending to the rear end R1 of the third region 40R. As shown in FIG. 2, the rear high basis weight portion 44 is shorter in the lateral direction Y than the absorbent core 40, and both side edges 44 s and 44 s of the rear high basis weight portion 44 are absorbent. It is located inward in the lateral direction Y from both side edges 40s, 40s of the core 40. The back high basic weight part 44 has more basic weight than the basic weight in the 1st area | region 40F side.
Here, the basis weight on the first region 40F side means the basis weight of the portion excluding the groove 43 when the first region 40F has the groove 43 as in the present embodiment. The groove portion 43 is a groove portion formed in a portion other than the high basis weight portions 41 and 44 described later. In the present embodiment, a vertical groove portion 43X extending in the vertical direction X and a horizontal groove portion 43Y extending in the horizontal direction Y are provided. Is formed. In this embodiment, the basic weight in the 1st area | region 40F side is a basic weight in the small absorption part 46 in the 1st area | region 40F. In the first region 40F, the groove 43 has a lower basis weight than the small absorbent portion 46.

  In the napkin 1 of the present embodiment, the intermediate high basis weight portion 41 of the second region 40M and the rear high basis weight portion 44 of the third region 40R, as shown in FIG. 2, except for groove portions 41d and 44d described later, The thickness is thicker than the thickness of the absorbent core 40 in the first region 40F located in front of the second region 40M. The absorbent core 40 in the napkin 1 has a shape that is long in the same direction as the longitudinal direction X of the napkin 1. Therefore, the longitudinal direction of the absorbent core 40 is the same direction as the longitudinal direction X of the napkin 1, and the lateral direction of the absorbent core 40 is the same direction as the lateral direction Y of the napkin 1.

  In the napkin 1, the intermediate high basis weight portion 41 and the rear high basis weight portion 44 have a larger basis weight than the basis weight of the first region 40 </ b> F in the absorbent core 40. The thickness and basis weight of the first region 40F compared with the thickness and basis weight of each of the intermediate high basis weight portion 41 and the rear high basis weight portion 44 are obtained when the groove portion 43 is formed in the first region 40F. In the first region 40F, the thickness and basis weight in the portion where the groove 43 is not present are meant. In the present embodiment, the portion where the groove portion 43 does not exist in the first region 40F is the small absorption portion 46 in the first region 40F. The absorbent core 40 of the napkin 1 of the present embodiment is more flexible as the entire absorbent core 40 because a difference in thickness is provided in the basis weight of the core material.

  The intermediate high basis weight portion 41 in the absorbent core 40 of the present embodiment has a thin intermediate groove portion 41d, and the rear high basis weight portion 44 has a thin rear groove portion 44d. Here, the “thin intermediate groove portion 41d” refers to the case where the bottom has a thickness even if it is thin in the thickness direction Z, and penetrates the absorbent core without any constituent material of the absorbent core. Both of the cases are included, and it means a portion where the thickness is thinner than other portions in the intermediate high basis weight portion 41. In addition, the “thin rear groove portion 44d” refers to a case where the bottom has a thickness even if it is thin in the thickness direction Z, and penetrates the absorbent core without any constituent material of the absorbent core. Both of the cases are included, and it means a portion where the thickness is thinner than other portions in the rear high basis weight portion 44. In the napkin 1, the basis groove weight of the intermediate groove portion 41d and the rear groove portion 44d is lower than the basis weight of the small absorbent portion 46 in the first region 40F.

As shown in FIG. 2, the intermediate high basis weight portion 41 of the absorbent core 40 of the present embodiment includes a plurality of intermediate groove portions 41 d having a relatively low basis weight and relatively high basis weights surrounded by the intermediate groove portions 41 d. The block structure having the intermediate small absorption portion 41k has a plurality of block regions arranged in the vertical direction X. Specifically, in the intermediate high basis weight portion 41, five intermediate small absorbent portions 41 k divided by the intermediate groove portion 41 d are arranged along the longitudinal direction X of the absorbent core 40. Two intermediate small absorbing portions 41k are arranged along the horizontal direction Y, and a total of ten intermediate small absorbing portions 41k are formed.
The intermediate groove portion 41 d has an outer peripheral intermediate groove portion 41 da that extends along the contour of the intermediate high basis weight portion 41. The intermediate groove 41 d has a horizontal intermediate groove 41 dy extending in the horizontal direction Y of the absorbent core 40 and a vertical intermediate groove 41 dx extending in the vertical direction X of the absorbent core 40. In the longitudinal direction X, the longitudinal intermediate groove portion 41dx is disposed in the first region 40F and the longitudinal groove portion 43X in the high basis weight portion interval region 45 described later, the longitudinal rear groove portion 44dx of the rear high basis weight portion 44, and the rear of the absorbent core 40. Along with the longitudinal groove portion 43X extending to the end, a straight groove that is continuous over the entire length of the absorbent core 40 in the longitudinal direction X is formed. The intermediate groove 41d extends from the one side edge 40s along the longitudinal direction X of the absorbent core 40 to the other side edge 40s as a horizontal intermediate groove part 41dy extending in the horizontal direction Y, and other than the intermediate high basis weight part 41. In this portion, the horizontal groove 43Y extending in the horizontal direction Y is continuously formed on a straight line. The vertical intermediate groove 41dx and the horizontal intermediate groove 41dy are collectively referred to as an intermediate groove 41d.

As shown in FIG. 2, the rear high basis weight portion 44 of the absorbent core 40 of the present embodiment includes a plurality of rear groove portions 44 d having a relatively low basis weight and a relatively high basis weight and surrounded by the rear groove portion 44 d. The block structure having the rear small absorption portion 44k has a plurality of block regions arranged in the vertical direction X. Specifically, in the rear high basis weight portion 44, two small rear absorbent portions 44k divided by the rear groove portion 44d are arranged along the longitudinal direction X of the absorbent core 40. Two rear small absorption portions 44k are arranged along the horizontal direction Y, and a total of four rear small absorption portions 44k are formed.
The rear groove portion 44 d has an outer peripheral rear groove portion 44 da that extends along the contour of the rear high basis weight portion 44. The rear groove 44 d has a horizontal rear groove 44 dy extending in the horizontal direction Y of the absorbent core 40 and a vertical rear groove 44 dx extending in the vertical direction X of the absorbent core 40. The lateral rear groove portion 44dy is formed in a straight line continuously with the lateral groove portion 43Y extending in the lateral direction Y arranged in a portion other than the rear high basis weight portion 44 in the third region 40R of the absorbent core 40. The vertical rear groove 44dx and the horizontal rear groove 44dy are collectively referred to as a rear groove 44d.
The intermediate groove portion 41d and the rear groove portion 44d of the absorbent core 40 are opened to the non-skin facing surface side, similarly to the horizontal groove portion 43Y and the vertical groove portion 43X.

  The intermediate high basis weight portion 41 and the rear high basis weight portion 44 are separated from each other via a high basis weight portion spacing region 45 located between both the high basis weight portions 41, 44. As shown in FIG. 2, the intermediate high basis weight portion 41 and the rear high basis weight portion 44 in the present embodiment are separated in the longitudinal direction X of the absorbent core 40, and between these high basis weight portions 41, 44. Is provided with a high basis weight portion spacing region 45. The high basis weight portion spacing region 45 is a region having a smaller basis weight than the intermediate high basis weight portion 41 and the rear high basis weight portion 44, and the thickness of the high basis weight portion spacing region 45 is also the middle high basis weight portion 45. Smaller than the weight part 41 and the rear high basis weight part 44. In addition, as above-mentioned, although the intermediate | middle high basic weight part 41 and the back high basic weight part 44 in this embodiment have the intermediate groove part 41d and the back groove part 44d, respectively, these high basic weight parts 41 and 44 are. The vertical intermediate groove 41dx, the horizontal intermediate groove 41dy, the vertical rear groove 44dx, and the horizontal rear groove 44dy that divide the high basic weight portions 41, 44 into a plurality of block regions are not included in the high basic weight portion interval region 45.

  At least one of the intermediate high basis weight portion 41 and the rear high basis weight portion 44 protrudes toward the non-skin side sheet 3 side. In the napkin 1 according to the present embodiment, as shown in FIG. 3A, the intermediate high basis weight portion 41 and the rear high basis weight portion 44 protrude to the non-skin side sheet 3 side, that is, the non-skin facing surface side. In the intermediate high basis weight portion 41, the central intermediate high basis weight portion 41C and the side intermediate high basis weight portion 41S protrude toward the non-skin side sheet 3 side. As for the napkin 1 of this embodiment, although both the intermediate | middle high basic weight part 41 and the back high basic weight part 44 protrude in the non-skin side sheet | seat 3 side, a napkin (absorbent article) is intermediate | middle high basic weight. The portion 41 may protrude to the non-skin side sheet 3 side, and the rear high basis weight portion 44 may protrude to the skin side sheet 2 side (see FIG. 3B). The form which protrudes to the skin side sheet | seat 2 side and the back high basic weight part 44 protruded to the non-skin side sheet | seat 3 side may be sufficient (refer FIG.3 (c)).

  The absorbent article in the present invention has an intermediate high basis weight portion 41 and a rear high basis weight portion 44 in which the absorbent core 40 is separated from each other via a high basis weight portion spacing region 45, and these high basis weights. At least one of the parts 41 and 44 protrudes to the non-skin side sheet 3 side. Such an absorbent article is formed between the non-skin side sheet 3 and the absorbent core 40 by one or both of the intermediate high basis weight part 41 and the rear high basis weight part 44 protruding to the non-skin side sheet 3 side. Since a space is generated in the case, a high cushioning property is achieved and the feeling of wearing is excellent. Further, in the high basis weight part that can absorb a large amount of body fluid, vapor is easily generated from the absorbed body fluid, and stuffiness is likely to occur. However, the absorbent article of the present invention has a non-skin-side sheet 3 and an absorbent core 40. Due to the space in between, steam in the high basis weight part can be escaped efficiently, so that stuffiness is difficult to occur. Hereinafter, an effect that does not easily cause stuffiness is also referred to as a stuffiness suppressing effect.

For example, as shown in FIG. 3B, the napkin 1 of the embodiment in which the intermediate high basis weight portion 41 protrudes toward the non-skin side sheet 3 and the rear high basis weight portion 44 protrudes toward the skin side sheet 2 side. In addition, before and after the intermediate high basis weight portion 41 in the longitudinal direction X of the absorbent core 40, spaces S1 and S2 are provided between the non-skin side sheet 3 and the absorbent core 40. Specifically, the spaces S1 and S2 are provided behind the entire first area 40F and the intermediate high basis weight portion 41 of the third area 40R. Since the absorbent core 40 can be easily bent to the skin facing surface side or the non-skin facing surface side in the spaces S1 and S2, the napkin 1 can exhibit good cushioning properties.
The napkin 1 shown in FIG. 3 (b) has spaces S 3 and S 4 between the skin-side sheet 2 and the absorbent core 40 before and after the rear high basis weight portion 44 in the longitudinal direction X of the absorbent core 40. ing. Moreover, since the high basic weight part space | interval area | region 45 is distribute | arranged between the intermediate | middle high basic weight part 41 and the back high basic weight part 44, even if the absorptive core 40 bends, it becomes the high basic weight part space | interval area | region 45. Space S2 is ensured reliably. As described above, the napkin 1 shown in FIG. 3B has spaces S1, S2, and S2 between the skin-side sheet 2 and the absorbent core 40 and between the non-skin-side sheet 3 and the absorbent core 40, respectively. Since it has S3 and S4, a vapor | steam can be efficiently escaped by the skin opposing surface side and the non-skin opposing surface side of the absorptive core 40. FIG.
Further, the napkin 1 shown in FIG. 3 (b) has a rear high basis weight portion 44 protruding toward the skin-side sheet 2, so that the rear high basis weight portion 44 is on the back side (rear side) of the wearer's liquid excretion portion. It is possible to satisfactorily fit the portion of the side) and to effectively suppress the occurrence of liquid leakage in the rear section C.

Moreover, as shown in FIG.3 (c), the napkin 1 of embodiment from which the intermediate | middle high basic weight part 41 protruded to the skin side sheet | seat 2 side and the back high basic weight part 44 protruded to the non-skin side sheet | seat 3 side is The space S <b> 5 and the space S <b> 6 are provided between the non-skin side sheet 3 and the absorbent core 40 before and after the rear high basis weight portion 44 in the longitudinal direction X of the absorbent core 40. Specifically, the space S5, S6 is provided on the rear side of the region from the first region 40F to the rear high basis weight portion 44 of the third region 40R and the rear high basis weight portion 44 of the third region 40R. ing. In the napkin 1, the absorbent core 40 can be easily bent toward the skin facing surface side or the non-skin facing surface side in the spaces S5 and S6, and can exhibit good cushioning properties.
The napkin 1 shown in FIG. 3C has spaces S7 and S8 between the skin side sheet 2 and the absorbent core 40 before and after the intermediate high basis weight portion 41 in the longitudinal direction X of the absorbent core 40. ing. Moreover, since the high basic weight part space | interval area | region 45 is distribute | arranged between the intermediate | middle high basic weight part 41 and the back high basic weight part 44, even if the absorptive core 40 bends, it becomes the high basic weight part space | interval area | region 45. The space S5 is reliably ensured. Thus, also in the napkin 1 shown in FIG.3 (c), it is space S5, S6 between the skin side sheet | seat 2 and the absorptive core 40, and between the non-skin side sheet | seat 3 and the absorptive core 40, respectively. , S7, and S8, steam can be efficiently released on the skin facing surface side and the non-skin facing surface side of the absorbent core 40. From the viewpoint of enhancing such a dampness-suppressing effect, it is preferable to use a moisture-permeable sheet as the non-skin side sheet.
Further, the napkin 1 shown in FIG. 3 (c) has the intermediate high basis weight portion 41 protruding toward the skin side sheet 2, so that the intermediate high basis weight portion 41 is excellent in the portion of the wearer's liquid excretion portion. While fitting, the occurrence of liquid leakage in the intermediate zone B can be effectively suppressed.

As shown in FIG. 3A, the napkin 1 of the present embodiment has a front area because both the intermediate high basis weight portion 41 and the rear high basis weight portion 44 protrude toward the non-skin side sheet 3 side. Since there are spaces S1, S45, S6 on the rear side of the entire area of A, the high basis weight portion interval region 45, and the rear high basis weight portion 44 of the rear section C, in the spaces S1, S45, S6 And the absorptive core 40 can bend easily to the skin opposing surface side or the non-skin opposing surface side, and there can exist favorable cushioning properties.
The napkin 1 of the present embodiment has the spaces S1, S45, and S6 before and after the intermediate high basis weight portion 41 and the rear high basis weight portion 44 in the longitudinal direction X of the absorbent core 40, respectively. Moreover, since the high basic weight part space | interval area | region 45 is distribute | arranged between the intermediate | middle high basic weight part 41 and the back high basic weight part 44, space S45 of the high basic weight part space | interval area | region 45 is ensured reliably. . For this reason, the vapor | steam generate | occur | produced in the high basic weight parts 41 and 44 can be escaped still more efficiently.
Further, as shown in FIG. 3A, the napkin 1 of the present embodiment is substantially flat on the skin side sheet 2 side, and the adhesion between the skin side sheet 2 and the absorbent core 40 is increased. The transferability of the body fluid from the absorbent core 40 to the absorbent core 40 is high, and the body fluid can be absorbed quickly.

  From the viewpoint of easily deforming the absorbent core 40 and further improving the flexibility and fit of the absorbent core 40, the absorbent core 40 is provided in the high basis weight part interval region 45. It is preferable to have a groove 43Y having a lower basis weight and extending in the lateral direction as compared with the other parts. In addition, with such a configuration, in the high basis weight portion interval region 45, the space between the non-skin side sheet 3 and the absorbent core 40 and the lateral groove portion 43Y are continuously present. Moreover, the above-mentioned dampening suppression effect can be improved more by escaping the vapor | steam generated by the horizontal groove part 43Y efficiently. As shown in FIG. 2, the absorbent core 40 according to the present embodiment includes a plurality of lateral groove portions 43Y in the high basis weight portion interval region 45. However, even when the lateral groove portion 43Y has only one, the flexibility , The fit and the dampness-suppressing effect can be achieved.

  From the viewpoint of further improving the flexibility, fit and dampness suppression effect by the lateral groove portion 43Y in the high basis weight portion spacing region 45, the lateral groove portion 43Y in the high basis weight portion spacing region 45 includes the intermediate high basis weight portion and the rear side. It is preferable to be in contact with at least one of the high basis weight parts. With such a configuration, it is possible to further improve the above-described effect of releasing steam generated in the high basis weight portions 41 and 44. Here, “in contact with at least one of the intermediate high basis weight portion 41 and the rear high basis weight portion 44” means that in the longitudinal direction X, at least one of the intermediate high basis weight portion 41 and the rear high basis weight portion 44. This means that the lateral groove 43Y overlaps. Further, “overlapping in the vertical direction X” means that in the vertical direction X, a part of the outer peripheral edge of the intermediate high basis weight part 41 and a part of the outer peripheral edge of the lateral groove part 43Y or the rear high basis weight part 44 It includes that a part of the peripheral edge overlaps with a part of the outer peripheral edge of the lateral groove 43Y. In the high basis weight portion interval region 45 of the absorbent core 40 of the present embodiment, the lateral groove portion 43Y located on the rearmost side is along the front end portion 44F of the rear high basis weight portion 44 in the longitudinal direction X, and the front end It is adjacent to the portion 44F. Thus, it is preferable that the groove part 43Y extended in the horizontal direction Y in the high basic weight part space | interval area | region 45 is in contact with the intermediate | middle high basic weight part 41 or the back high basic weight part 44, and the intermediate | middle high basic weight part 41 Further, it is more preferable to be in contact with the rear high basis weight portion 44.

  From the viewpoint of creating a space before and after the intermediate high basis weight portion 41 of the absorbent core 40 and improving the liquid absorbency and the like, the thickness of the intermediate high basis weight portion 41 in the absorbent core 40 is the first region 40F. The thickness is preferably 110% to 300%, more preferably 120% to 270%. The difference in thickness between the thickness of the intermediate high basis weight portion 41 and the thickness of the first region 40F (the former-the latter) is preferably 1.0 mm or more and 13.0 mm or less, more preferably 2.0 mm or more and 7.0 mm. It is as follows. Further, the thickness of the intermediate high basis weight portion 41 is preferably 3.0 mm or greater and 15.0 mm or less, and more preferably 5.0 mm or greater and 10.0 mm or less.

  The intermediate high basis weight portion 41 in the present embodiment includes a central intermediate high basis weight portion 41C and side intermediate high basis weight portions 41S and 41S, but the central intermediate high basis weight portion 41C and the lateral intermediate portion. The thickness of the high basis weight portion 41S is preferably in the range of the thickness of the intermediate high basis weight portion 41 described above. Further, the central middle high basis weight portion 41C and the side middle high basis weight portion 41S may have the same thickness or different thicknesses. In the middle high basis weight portion 41 of the present embodiment, the thickness of the central middle high basis weight portion 41C is larger than that of the side middle high basis weight portion 41S (see FIG. 4). The thickness of the side intermediate high basis weight portion 41S is preferably 50% or more, more preferably 55% or more, and preferably 100% or less, more preferably, relative to the thickness of the central intermediate high basis weight portion 41C. 95% or less.

  As shown in FIG. 5, the rear high basis weight portion 44 protrudes toward the non-skin side sheet 3. From the viewpoint of creating a space before and after the rear high basis weight portion 44 and improving the absorbability of the liquid of the absorbent core 40, the thickness of the rear high basis weight portion 44 in the absorbent core 40 is the first region 40F. The thickness is preferably 110% or more and 280% or less, more preferably 120% or more and 200% or less. The difference in thickness between the thickness of the rear high basis weight portion 44 and the thickness of the first region 40F (the former-the latter) is preferably 1.0 mm or more and 12.0 mm or less, more preferably 2.0 mm or more and 6.0 mm. It is as follows. Moreover, the thickness of the back high basic weight part 44 becomes like this. Preferably they are 3.0 mm or more and 14.0 mm or less, More preferably, they are 5.0 mm or more and 9.0 mm or less.

  In addition, although it is preferable that it is the relationship of the said thickness in the whole range of the intermediate | middle high basic weight part 41 and the back high basic weight part 44, in the thickness direction of the intermediate | middle high basic weight part 41, the horizontal direction Y or the vertical direction X Or in the case where gradual thickness increase / decrease is provided in both directions, it is only necessary that the above relationship is satisfied in the thickest part.

The thickness of the first region 40F 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 a portion without the groove 43 described later. In the napkin 1, it is preferable that the thickness of the first region 40F is formed substantially uniformly in a portion where a groove portion 43 described later does not exist, but gradually increases in the horizontal direction Y or the vertical direction X of the first region 40F. In the case where an increase / decrease in thickness is provided, it is sufficient that the above relationship is satisfied in the thickest portion.
Moreover, it is preferable that the thickness in parts other than the back high basic weight part 44 of the 3rd area | region 40R is the range of the thickness of the said 1st area | region 40F.
The thickness of each part such as the intermediate high basis weight portion 41, the rear high basis weight portion 44, the portion other than the rear high basis weight portion 44 of the first region 40F or the third region 40R is measured by the following method.

<Measuring method of thickness of each part of absorbent core 40>
The absorbent core is allowed to stand in a horizontal place so as not to be wrinkled or bent, and each part as a measurement object is cut out from the absorbent core 40. And the thickness under the load of 3.5 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 circular plate or a square plate (thickness of about 5 mm) having a size adjusted so that the load is 3.5 cN / cm ² between the tip of the thickness meter and the cut object to be measured. The metal plate is placed and the thickness is measured. When measuring the thickness of the first region 40F and the like in the absorbent core 40, the thickness is measured so as not to include a groove 43 described later.

In the napkin 1, the basis weight of the intermediate high basis weight portion 41 in the absorbent core 40 is preferably 300 g / m ² or more and 900 g from the viewpoint of improving the absorbability of the absorbent core liquid in the intermediate section B and the feeling of wearing. / M ² or less, more preferably 450 g / m ² or more and 800 g / m ² or less.
The basis weight of the rear high basis weight portion 44 of the absorbent core 40 is preferably 300 g / m ² or more 850 g / m ² or less, more preferably 400 g / m ² or more 700 g / m ² or less. The basis weight of the first region 40F in the absorbent core 40 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. Moreover, it is preferable that the basic weight of parts other than the high basic weight part space | interval area | region 45 and the back high basic weight part 44 of the 3rd area | region 40R is the same as the preferable range of the basic weight of the 1st area | region 40F. The basis weight of the portion other than the rear high basis weight portion 44 of the intermediate high basis weight portion 41, the rear high basis weight portion 44, the first region 40F, the high basis weight portion interval region 45, and the third region 40R is the absorptivity described above. The mass of the sample of the target measurement object cut out as described in the method for measuring the thickness of each part of the core 40 is obtained by dividing by the area of the surface of the sample facing the skin.

From the viewpoint of improving the absorbability of the absorbent core liquid and the feeling of wearing in the intermediate zone B, the total length L2 in the longitudinal direction X of the intermediate high basis weight portion 41 is relative to the total length L1 in the longitudinal direction X of the absorbent core 40. Thus, it is preferably 20% or more and 70% or less, more preferably 25% or more and 55% or less. The total length L1 indicates the distance at the longest position in the longitudinal direction X of the absorbent core 40, and the total length L2 indicates the distance at the longest position in the vertical direction X of the intermediate high basis weight portion 41 (see FIG. 6). ).
Further, from the viewpoint of improving the absorbability and the like of the absorbent core liquid in the rear section C, the total length L4 in the longitudinal direction X of the rear high basis weight portion 44 is the total length L1 in the longitudinal direction X of the absorbent core 40. On the other hand, it is preferably 3% or more and 25% or less, more preferably 5% or more and 20% or less. The total length L4 means the distance at the longest position in the longitudinal direction X of the intermediate high basis weight portion 41 (see FIG. 6).
From the viewpoint of further improving the cushioning properties and the dampness-suppressing effect of the absorbent core 40, the overall length L3 in the longitudinal direction X of the high basis weight portion spacing region 45 is preferably relative to the overall length L1 in the longitudinal direction X of the absorbent core 40. Is from 3% to 25%, more preferably from 5% to 20%. As shown in FIGS. 3A to 3C and FIG. 6, the total length L3 of the high basis weight portion spacing region 45 is between the intermediate high basis weight portion 41 and the rear high basis weight portion 44 in the longitudinal direction X. Is the shortest distance.

From the viewpoint of further improving the cushioning properties and the dampening suppression effect of the absorbent core 40, the overall length L7 of the intermediate high basis weight portion 41 in the lateral direction Y is preferably relative to the overall length L6 of the absorbent core 40 in the lateral direction Y. 30% or more and 100% or less, more preferably 50% or more and 100% or less. The full length L6 indicates the distance at the longest position in the lateral direction Y of the absorbent core 40, and the full length L7 means the distance at the longest position in the lateral direction Y of the intermediate high basis weight portion 41 (see FIG. 6). ).
From the same viewpoint as described above, the overall length L8 in the lateral direction Y of the rear high basis weight portion 44 is preferably 10% or more and 50% or less, more preferably, relative to the overall length L7 in the lateral direction Y of the intermediate high basis weight portion 41. Is 20% or more and 40% or less. The total length L8 means the distance at the longest position in the lateral direction Y of the rear high basis weight portion 44 (see FIG. 6).

In the napkin 1, intermediate groove portions 41 dx and 41 dy are provided in the intermediate high basis weight portion 41 of the absorbent core 40, rear groove portions 44 dx and 44 dy are provided in the rear high basis weight portion 44, and groove portions 43 X and 43 Y are provided in addition to the high basis weight portions 41 and 44. It has been. The groove widths of these groove portions may be different from each other, or all may be the same, but the groove widths of the groove portions 41d, 44d, and 43 further improve the fit of the absorbent core 40 and the anti-steaming effect. From the viewpoint of making it, it is preferably 0.1 mm or more and 5.0 mm or less, more preferably 0.5 mm or more and 3.0 mm or less. In addition, the groove width of the groove parts 41d, 44d, and 43 and the thickness to be described later are measured in a direction perpendicular to the extending direction of the groove parts 41d, 44d, and 43 and measured from a photograph of the cut end face. In the napkin 1, the thickness of the groove portions 41d, 44d, 43 in the absorbent core 40 is preferably 0.08 mm or more and 7.0 mm or less, more preferably 0.15 mm or more and 3. 5 mm or less.
The intermediate groove portions 41dx and 41dy and the rear groove portions 44dx and 44dy are preferably lower than the basis weights other than the high basis weight portions 41 and 44. Here, the basis weight other than the high basis weight part means the basis weight of the portion excluding the groove part 43 when the groove part 43 is provided. The basis weights of these groove portions 41d, 44d, and 43 may be different from each other, or may all be the same. However, the basis weights of the groove portions 41d, 44d, and 43 are the fit and stuffiness of the absorbent core 40. From the viewpoint of further improving the suppression effect, it 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 groove part 41d, 44d, 43 is the non-skin opposing surface of the sample of the sample of the part of groove part 43 cut out as demonstrated with the measuring method of the thickness of each part of the absorbent core 40 mentioned above. Divide by the area of the side surface.

  In the napkin 1, the first region 40F and the third region 40R have the groove portion 43 and the small absorption portion 46, respectively, the second region 40M has an intermediate high basis weight portion 41, and the third region 40R has a rear high basis weight portion 44. As for the absorptive core 40 which has these, 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

As shown in FIG. 7A, the absorbent core 40 of the napkin 1 described above has a stacking recess 55 on the outer peripheral surface, and rotates in one direction R, and the outer periphery of the stacking drum 54 It can be manufactured using a fiber stacking device provided with a duct (not shown) for supplying the core material in a scattered state on the 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 intermediate high basis weight portion 41 and the rear high basis weight portion 44 are formed on a part of the bottom surface 56 of the accumulation concave portion 55. Is formed. In addition, the depth of the bottom portion of the recess 56b is different between a portion forming the central intermediate high basis weight portion 41C of the intermediate high basis weight portion 41 and a portion forming the side intermediate high basis weight portion 41S. Moreover, the air-impermeable member 57 for forming the groove part 41d in the intermediate high basic weight part 41 is disposed. Further, at the bottom of the concave portion 56 c, a portion for forming the rear high basis weight portion 44 and a non-breathable member 57 for forming the groove portion 44 d in the rear high basis weight portion 44 are disposed. A non-breathable member 58 for forming the groove portions 43X and 43Y is formed on the bottom surface 56 of the accumulation concave portion 55 other than the concave portions 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.

  As shown in FIG. 7B, by supplying a core material such as pulp fiber into the duct while sucking from the bottom surface of the accumulation concave portion 55, as in the known fiber pile device including the fiber pile drum. In addition, the core material is deposited in a predetermined shape in the accumulation recess 55. The absorbent core 40 is obtained by releasing the deposit 400 from the accumulation recess 55. The absorbent core 40 is pressed and compressed appropriately by passing between a pair of rolls before or after coating with the core wrap sheet. As a result, the portion made of the core material deposited on the breathable member in the recess 56b becomes a groove portion 41d having a relatively small basis weight and density, and is deposited on the bottom surface of each recess 56b that does not have the breathable member. The part which became the intermediate | middle small absorption part 41k with relatively large basic weight and density. Similarly, in the portions other than the concave portions 56b and 56c, the portions made of the core material deposited on the air-impermeable member 58 become the groove portions 43X and 43Y having a relatively small basis weight and density, and the air-impermeable member 58 is formed. The portion deposited on the bottom surface that does not have becomes a small absorbing portion 46 having a relatively large basis weight and density. When manufacturing the absorptive core containing a water absorbing polymer, it is preferable to provide the introduction part of a water absorbing polymer in the middle of a duct.

As shown in FIG. 8, the skin-side sheet 2 of the present embodiment has a height higher than the high-convex portion row 21 </ b> L and the high-convex portion row 21 </ b> L in which a plurality of high-projection portions 2 t <b> 1 protruding to the skin-facing surface side are arranged in the horizontal direction. 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 47 alternately arranged in the vertical direction. Specifically, in the intermediate area B where the intermediate high basis weight part 41 is arranged and the rear area C where the rear high basis weight part 44 is arranged, the high convex part 2t1 protruding to the skin facing surface side of the skin side sheet 2. Forms a plurality of high convex portion rows 21L arranged along the horizontal direction Y, and forms a plurality of low convex portion rows 22L arranged with a plurality of low convex portions 2t2 along the horizontal direction Y. And as shown in FIG. 8, the high convex part row | line | column 21L and the low convex part row | line | column 22L are alternately arrange | positioned by the vertical direction X. As shown in FIG. In the napkin 1 of this embodiment, the high convex part row | line 21L and the low convex part row | line 22L exist in the whole surface of the skin side sheet | seat 2, and the high convex part row | line | column 21L of the whole region of the absorptive core 40 and the skin side sheet | seat 2 is present. And the low convex part row 22L overlaps in plan view. The relationship between one high convex portion row 21L and one low convex portion row 22L adjacent to the one high convex portion row 21L is that the height adjacent to the horizontal direction Y constituting the one high convex portion row 21L. One low convex portion 2t2 constituting the one low convex portion row 22L is arranged at an intermediate position between the convex portions 2t1 and 2t1.
Thus, since the skin side sheet 2 has a plurality of convex portions protruding to the skin facing surface side, a gap (space) is generated between the wearer's skin and the skin side sheet 2. Coupled with the effect of suppressing stuffiness caused by protruding the intermediate high basis weight portion 41 or the rear high basis weight portion 44 toward the non-skin facing surface side, stuffiness in the napkin 1 can be further effectively suppressed. Moreover, since the clearance gap (space) between a wearer's skin and the skin side sheet | seat 2 is easy to be maintained by the cushioning property of the absorptive core 40, the air permeability on the skin opposing surface side can be improved further.
From such a viewpoint, the skin-side sheet preferably has the high convex portion rows 21L and the low convex portion rows 22L formed along the lateral direction Y alternately arranged in the vertical direction X. It is preferable that the row 22 </ b> L is arranged so as to overlap the intermediate high basis weight portion 41 and the rear high basis weight portion 44.

  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. 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.

  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,. And the high convex part 2t1 of the high convex part row | line 21L and the low convex part 2t2 of the low convex part row | line 22L are arrange | positioned on the skin side sheet | seat 2 in zigzag form. In other words, the high protrusions 2t1 and the low protrusions 2t2 are alternately arranged in the oblique direction with respect to the horizontal direction Y and the vertical direction X, respectively. The high convex portion 2t1 and the low convex portion 2t2 will be described in detail later.

  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 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) is one embossed part 2E (intermediate embossed part) from the viewpoint of improving the drawability and diffusibility of the liquid in the skin-side sheet 2 and good touch. 2E1 and the other embossed part 2E2) are 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 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 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, and particularly preferably 7% or more and 20% or less from the viewpoint of body fluid drawability and texture. To 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 forms a gap (space) between the skin of the wearer and the skin side sheet 2, and further the skin side sheet. From the viewpoint of improving the drawability of the liquid in 2 and good touch, 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. In addition, the rising angle θ3 (see FIG. 10) from the bottom surface of the high convex portion 2t1 is 70 from the viewpoint of improving the effect of suppressing stuffiness by making it difficult to leave menstrual blood in a portion that touches the skin even during a large amount of menstrual blood. The angle is preferably from 90 ° to 90 °, and more preferably from 75 ° to 85 °.

The height hs (see FIG. 11) at the apex in the thickness direction (Z direction) of the low convex portion 2t2 forms a gap (space) between the skin of the wearer and the skin side sheet 2, and further the skin side sheet. From the viewpoint of improving the drawability of the liquid in 2 and good touch, 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 from the viewpoint of improving the effect of suppressing stuffiness by making it difficult for menstrual blood to remain in a portion that touches the skin even during a large amount of menstrual blood. The angle is preferably not less than 70 ° and not more than 70 °, more preferably not less than 30 ° and not more than 65 °. 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 of the napkin 1 is formed by laminating a first layer 2u located on the skin-facing surface side and a second layer 2d located on the absorbent core 40 side. ing. In the napkin 1, the skin-side sheet 2 includes a non-heat-shrinkable fiber layer 2u as a first layer including non-heat-shrinkable fibers on the skin-facing surface side, and a non-skin-facing surface side, as shown in FIGS. And a heat-shrinkable fiber layer 2d as a second layer containing heat-shrinkable fibers that have been heat-shrinked. 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 has a plurality of recesses recessed by an embossed part 2E embossed from the skin-facing surface side of the non-heat-shrinkable fiber layer 2u, 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 FIGS. 9 to 11, the skin-side sheet 2 is formed by arranging 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. ing. Therefore, toward the heat-shrinkable fiber layer 2d in which the fiber density has increased due to the shrinkage, the excreted body fluid is drawn from the skin facing surface side to the non-skin facing surface side by capillary force, and more quickly shifts. It can be improved further.

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 skin-side sheet 2 has a structure in which convex portions are continuous in the vertical direction X or the horizontal direction Y and are alternately arranged in the horizontal direction Y or the vertical direction X, instead of the convex portion row in which a plurality of convex portions are arranged. It may be. 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 as the core material of the absorbent core 40. Moreover, you may mix | blend a deodorizer, an antibacterial agent, etc. with the absorptive core 40 as needed. When a core wrap sheet (not shown) that covers the absorbent core 40 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. The joint portion 6 that joins the side sheet 5 and the skin side sheet 2 can be formed in accordance with a conventional method by heat sealing.

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.
For example, the absorptive core 40 in this embodiment is the middle high basis weight portion 41 as the middle middle high basis weight portion 41C and the lateral direction Y from each side edge along the longitudinal direction X of the middle middle high basis weight portion 41C. It has side intermediate high basis weight parts 41S and 41S that extend outward and extend to both side edges along the longitudinal direction X of the absorbent core 40. You may have only 41C. That is, the intermediate high basis weight portion 41 does not have to reach both side edges along the longitudinal direction X of the absorbent core 40.

  In addition, the entire absorbent core 40 of the napkin 1 is integrally formed, but instead of this, the core material is formed at the same height from the first region 40F to the third region 40R, Next, the intermediate high basis weight portion 41 or the rear high basis weight portion 44 may be formed by arranging 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 section 3 Non-skin side sheet 4 Absorbent body 40 Absorbent core 40F First area of absorbent core 40M Second area of absorbent core 40R Third area of absorbent core 41 Middle high basis weight section 41C Central middle high pyeong Weight part 41S Side intermediate high basis weight part 41d Intermediate groove part
41dx vertical intermediate groove
41dy Horizontal intermediate groove portion 41k Intermediate small absorption portion 44 Rear high basis weight portion 44d Rear groove portion
44dx vertical rear groove
44dy Lateral rear groove portion 44k Rear small absorbent portion 45 High basis weight portion spacing region 46 Small absorbent portion 47 High and low convex portion row region 5 Side sheet 6 Joint portion 7 Linear compressed groove

Claims (7)

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 area between a first area located on the front area side and a third area located on the rear area side, and the second area and the third area, It is equipped with an intermediate high basis weight part and a rear high basis weight part with a larger basis weight than the basis weight on the first region side,
The intermediate high basis weight part and the rear high basis weight part are separated from each other via a high basis weight part interval region located between the two high basis weight parts,
An absorptive article in which at least one of the middle high basic weight part and the back high basic weight part protrudes to the non-skin side sheet side.   2. The absorbent article according to claim 1, wherein the high basis weight portion interval region has a groove portion having a basis weight lower than other portions in the high basis weight portion interval region and extending in the lateral direction. .   The absorbent article according to claim 2, wherein the groove portion is in contact with at least one of the intermediate high basis weight portion and the rear high basis weight portion.   The absorptive article according to any one of claims 1 to 3 in which said middle high basic weight part has projected to said non-skin side sheet side.   The absorptive article according to any one of claims 1 to 3 in which said back high basic weight part has projected to said non-skin side sheet side.   The absorbent article according to any one of claims 1 to 3, wherein each of the intermediate high basis weight part and the rear high basis weight part protrudes toward the non-skin side sheet. The said skin side sheet | seat is an absorbent article of any one of Claims 1-6 which has multiple convex parts which protruded to the skin opposing surface side.

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