WO2018122899A1

WO2018122899A1 - Absorbent article

Info

Publication number: WO2018122899A1
Application number: PCT/JP2016/088633
Authority: WO
Inventors: 由佳林; 祐一廣瀬
Original assignee: 花王株式会社
Priority date: 2016-12-26
Filing date: 2016-12-26
Publication date: 2018-07-05
Also published as: SG11201900462XA; CN109069324B; MY186592A; JP6321897B1; JPWO2018122899A1; TWI758380B; CN109069324A; TW201828901A

Abstract

An absorbent article (1) is provided with an absorbent core (41). The absorbent core (41) has a protruding part (42) protruding toward a non-skin-side sheet (3) in an excretion-facing zone (B). The protruding part (42) has a thickness greater than the thickness of a first region 41F and a second region 41R of the absorbent core (41). The protruding part (42) has a largest-width part where the length thereof in a transverse direction (Y) orthogonal to a longitudinal direction (X) of the absorbent core (41) is greatest in plan view, and the length of the largest-width part in the transverse direction (Y) is the same as the length of the absorbent core (41) in the transverse direction (Y).

Description

Absorbent articles

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

Conventionally, in the case of absorbent articles such as sanitary napkins and disposable diapers, when there are a lot of excreted bodily fluids, there are cases in which liquid leakage occurs in daily living activities. For this reason, a method has been proposed in which a body fluid is absorbed in a wide range by providing an intermediate core portion having a large basis weight in the central portion of the absorbent core of the absorbent article (for example, Patent Documents 1 and 2).

In Patent Document 1, in the absorbent core of the absorbent article, a central portion having a higher height and higher density than the other portions is provided in the central region, and the central portion is arranged equally to the lateral width of the absorbent core. Absorbent articles are described.

Moreover, in patent document 2, the absorber of an absorbent article contains the upper absorption part and lower absorption part in a lamination | stacking state, and the width | variety of an upper absorption part and the width | variety of a lower absorption part become the same dimension. Absorbent articles are described.

In addition, as a technique different from these techniques, the applicant previously stated that the central region in the width direction is non-skin at the excretory part facing part of the absorbent core from the viewpoint of improving the followability to the body shape. The absorbent article provided with the absorber which protruded toward the side sheet | seat was proposed (patent document 3).

JP-A-61-602 JP 2012-81246 A JP 2016-88672 A

The present invention covers an absorbent body including a longitudinally long absorbent core corresponding to the longitudinal direction of the wearer, a skin-side sheet covering the skin facing surface of the absorbent body, and a non-skin facing surface of the absorbent body The present invention relates to an absorbent article having a front area and a rear area. The absorbent core has an intermediate region between a first region located on the front region side and a second region located on the rear region side, and the intermediate region includes the first region and the second region. A protrusion having a thickness larger than the thickness in the region is provided. The protruding portion protrudes toward the non-skin side sheet, and the skin facing surface is formed flat. The protruding portion has a maximum width portion in which the length in the lateral direction orthogonal to the longitudinal direction of the absorbent core is maximized in a plan view of the absorbent core, and the lateral direction at the maximum width portion Is the same as the lateral length of the absorbent core.

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 non-skin facing surface side of the absorbent core of the sanitary napkin shown in FIG. 3 is a cross-sectional view schematically showing a cross section taken along line III-III in FIG. 4 is a cross-sectional view schematically showing a cross section taken along line IV-IV in FIG. FIG. 5 is a sectional view schematically showing a section taken along line IV-IV in FIG. 6 (a) to 6 (b) are explanatory views for explaining a manufacturing process of the absorbent core included in the sanitary napkin shown in FIG. FIG. 7: is a top view which shows the skin opposing surface side (skin side sheet | seat side) of the sanitary napkin which is preferable other embodiment of the absorbent article of this invention. FIG. 8: is a top view which shows the skin opposing surface side (skin side sheet | seat side) of the sanitary napkin which is another preferable embodiment of the absorbent article of this invention.

Detailed Description of the Invention

Patent Documents

1 and 2 disclose a technique for improving the amount of absorption by a middle to high portion having a large basis weight disposed in the central portion of the absorbent core, but there is nothing regarding the projecting toward the non-skin side sheet. In the absorbent article described in

Patent Documents

1 and 2 that are not described, there is a gap between the step between the middle and high portions and the top sheet, and leakage due to the inability to quickly diffuse the discharged liquid into the absorber, There is a risk that the wearer may feel discomfort due to the difference in level. Moreover, in patent document 3, the absorbent article which made the center protrusion part protrude toward the non-skin side sheet | seat in the excretion part opposing part of an absorptive core is described. In the absorbent article described in Patent Document 3, the fit feeling when worn is improved, but the central protrusion is not formed over the entire width of the absorbent core, and the center is not worn or worn. There was a concern of liquid leakage when the misalignment between the protruding portion and the excretory portion occurred.

Therefore, an object of the present invention is to provide an absorbent article that can eliminate the above-mentioned drawbacks of the prior art.

Hereinafter, the 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 2 side is shown by FIG. As shown in FIG. 1, the napkin 1 includes an absorbent body 4 including a long absorbent core 41 in the longitudinal direction X corresponding to the wearer's front-rear direction and a skin-side sheet 2 that covers the skin-facing surface of the absorbent body 4. And a non-skin side sheet 3 that covers the non-skin facing surface of the absorbent body 4, and has a front area A and a rear area C. As shown in FIG. 1, the napkin 1 includes an excretion facing area B disposed opposite to the wearer's liquid excretion part, and a front area A and a rear area C disposed in the longitudinal direction X of the excretion facing area B. It is divided into and.

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 vertical direction X means “length”, which is a distance measured in the vertical direction X, and the length in the horizontal direction Y is It means “width” which is a distance measured in the horizontal 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. Further, in the present specification, the skin facing surface is a surface directed toward the wearer's skin when the absorbent article (napkin 1) is worn in the absorbent article (napkin 1) or a component thereof, and is non-skin facing A surface is a surface in the absorbent article (napkin 1) or a component thereof directed to the side opposite to the skin side (clothing side) when the absorbent article (napkin 1) is worn.

The napkin 1 includes an excretion facing area B that is disposed opposite to a wearer's liquid excretion part (such as the vaginal opening) when worn, and a front area that is disposed closer to the wearer's ventral side (front side) than the excretion facing area B A and a rear area C arranged closer to the wearer's back side (rear side) than the excretion facing area B. That is, the napkin 1 is divided in the longitudinal direction X in the order of the front area A, the excretion facing area B, and the rear area C.

In the absorbent article of the present invention, the excretion facing area B is a region having one wing portion 1W in the longitudinal direction X (one wing portion) when having the wing portion 1W like the napkin 1 of the present embodiment. 1W) is a region sandwiched between a root along the vertical direction X of 1W and a root along the vertical direction X of the other wing portion 1W. Moreover, in the case of the absorbent article which does not have the wing part 1W, the two folding lines which cross when the absorbent article is crossed in the horizontal direction Y produced when the absorbent article is folded into a three-fold individual form. About (not shown), the area | region enclosed by the 1st folding line and the 2nd folding line is counted from the front end of the longitudinal direction X of this 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 side flap portion 1 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 sheets 5 are arranged on both side portions along the vertical direction X on the skin facing surface of the skin side sheet 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 at the joining portion 6 as shown in FIG. A pair of corrugated joints 6 in which irregularities in the lateral direction Y due to a curve are alternately and continuously arranged in the longitudinal direction X are arranged symmetrically in the lateral direction Y about the center line CL in plan view. In this way, when the side sheet 5 is bonded and fixed to the skin-side sheet 2 at the wavy bonding portion 6, it is inward in the lateral direction Y from the bonding portion group of the wavy bonding portions 6. A space defined by the side sheet 5 and the skin side sheet 2 is formed. Since this space portion is open toward the center line CL, body fluid such as menstrual blood flowing outward from the center in the lateral direction Y is accommodated in the space portion, and as a result, body fluid leaks. It can be effectively prevented.

In the napkin 1, as shown in FIG. 1, the side flap portions 1S project greatly outward in the lateral direction Y in the excretion facing area B, and thereby on the left and right sides along the vertical direction X of the napkin 1, A pair of

wing portions

1W, 1W are extended. The wing portion 1W is used by being folded back to the non-skin facing surface side of the crotch portion of clothes such as shorts. 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, a linear compressed groove in which the skin side sheet 2 and the absorbent body 4 are integrally recessed toward the non-skin side sheet 3 side on the skin facing surface of the skin side sheet 2. 7 is formed. “Linear” in the linear compressed groove 7 means that the shape of the groove (concave portion) is not limited to a straight line in a plan view but includes a curved line. Each line may be a continuous line or a discontinuous line such as a broken line. In the napkin 1, the linear squeezing groove 7 is composed of a row formed by a number of discontinuous point embossments. 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 squeezing groove 7 has a first lateral squeezing groove 71 extending in the transverse direction Y in each of the front area A and the rear area C of the absorbent body 4 and both side portions along the longitudinal direction X of the excretion facing area B of the absorbent body 4. And a vertical pressing groove 73 extending in the vertical direction X. In the napkin 1, the first lateral pressing groove 71 has a curved shape that protrudes outward in the longitudinal direction X, and the vertical pressing groove 73 has a curved shape that protrudes outward in the lateral direction Y in the excretion facing area B. It is. The first lateral pressing groove 71 extends in the lateral direction Y across the pair of vertical pressing grooves 73 inside the pair of vertical pressing grooves 73. In the napkin 1, the first horizontal pressing groove 71 in the front section A, one vertical pressing groove 73, the first horizontal pressing groove 71 in the rear section C, and the other vertical pressing groove 73 are connected to form a ring-shaped circumferential groove. Forming. The linear squeezing groove 7 formed in this way can suppress the diffusion of the body fluid in the planar direction of the absorbent body 4, and can effectively prevent liquid leakage from the periphery of the napkin 1.

In the napkin 1, the absorbent core 41 constituting the absorbent body 4 includes a first region 41F located on the front section A side in the longitudinal direction X and a second region 41R located on the rear section C side, as shown in FIG. An intermediate region 41M is provided between the two. The intermediate region 41M includes a protruding portion 42 that is thicker than the thickness of the first region 41F and the second region 41R. In the napkin 1, the intermediate area 41M is arranged in the area of the excretion facing area B. The intermediate region 41M of the absorbent core 41 and the excretion facing area B of the napkin 1 may or may not match in the vertical direction. In the napkin 1, the intermediate region 41 M having the protrusions 42 extends not only in the vertical direction across the excretory counter area B, but also in a part of the front area A and the rear area C from the excretory counter area B. It extends to a part. In the napkin 1, the first area 41 F of the absorbent core 41 is arranged in the area of the front area A of the napkin 1 in a plan view as shown in FIG. The 2nd area | region 41R of the absorptive core 41 is arrange | positioned in the area | region.

In the napkin 1, as shown in FIG. 1, the absorbent core 41 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 41 is the same as the longitudinal direction X of the napkin 1, and the lateral direction of the absorbent core 41 is the same direction as the lateral direction Y of the napkin 1.

As shown in FIGS. 3 to 5, the protruding portion 42 of the intermediate region 41M protrudes toward the non-skin side sheet 3, and the napkin 1 has a flat skin facing surface. As shown in FIG. 4, the protrusion 42 has a thickness greater than the thickness of the first region 41F located in front of the intermediate region 41M and the thickness of the second region 41R located behind the intermediate region 41M. . Preferably, in the napkin 1, the protruding portion 42 is formed to be thicker than the thickness of the first region 41 F in the absorbent core 41, and more than the basis weight of the first region 41 F in the absorbent core 41. The amount is formed high. Moreover, in the napkin 1, the thickness of the protrusion part 42 is formed thicker than the thickness of the second region 41R in the absorbent core 41, and the basis weight of the second region 41R in the absorbent core 41 is larger. The basis weight is high. The thickness and basis weight of each of the first region 41F and the second region 41R to be compared with the thickness and basis weight of the protruding portion 42 are obtained when a groove 45 described later is formed in the first region 41F and the second region 41R. Means the thickness and basis weight of the first region 41F and the second region 41R in a portion where a groove 45 described later does not exist. 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.

As described above, the protrusion 42 has a flat skin-facing surface. Here, “the skin facing surface is flat” means not only a state in which the skin facing surface on the skin side sheet 2 side of the protruding portion 42 of the absorbent core 41 is flat, but also variations in the amount of fiber piled up depending on the place of fiber filling. In addition, it is meant to include a state where irregularities having a width of about 5 mm and a depth of about 2 mm are formed on a part of the skin-facing surface, which is caused by deformation during pressing and other manufacturing processes. Thus, in the napkin 1, the protrusion part 42 becomes a form which does not have a recessed part whose basic weight is lower than the basic weight of the 1st area | region 41F and the 2nd area | region 41R in the absorptive core 41 in the skin opposing surface side. ing. Here, the basis weight of the first region 41F and the second region 41R means the basis weight of the portion excluding the groove portion 45 when the first region 41F and the second region 41R have the groove portion 45. If a recess having a low basis weight is present on the skin facing surface side of the protruding portion 42, it prevents rapid excretion of the excretory liquid in the horizontal and vertical directions, thereby reducing the absorption of the liquid and the absorption speed. Not only does the liquid return easily occur, but the napkin 1 is likely to be wrinkled or broken unexpectedly. If a recess having a low basis weight exists as a vertical groove portion that vertically cuts the protruding portion 42 in the vertical direction X on the skin facing surface of the protruding portion 42, the protruding portion 42 is divided in the horizontal direction Y by the vertical groove. Not only is the wrinkle along the vertical direction of the napkin 1 starting from the vertical groove portion at the time of wearing, but also the absorbent core is divided by the movement of the wearer of the napkin 1 based on the vertical groove portion. It is assumed that this can also occur. When the absorbent core is divided in this manner, a gap is easily formed between the napkin 1 and the body, or the absorption capacity is remarkably reduced, which causes so-called liquid leakage. Furthermore, with respect to the absorbent core 41 having a flat skin-facing surface, the skin-side sheet 2 and the absorbent body 4 are integrally recessed toward the non-skin-side sheet 3 side in the subsequent process to form the linear compressed grooves 7. By forming it, it becomes more difficult to cause liquid leakage.

In the napkin 1, as shown in FIG. 4, the absorbent core 41 has a continuous layer RS having a uniform thickness extending from the first region 41F through the intermediate region 41M to the second region 41R on the skin facing surface. ing. In the napkin 1, the continuous layer RS is formed on the front surface of the skin facing surface of the absorbent core 41. The thickness of the continuous layer RS is the same as the thickness of the absorbent core 41 at the protruding boundary groove 43 described later or the thickness of the absorbent core 41 at the protruding boundary groove 43.

The thickness of the protrusion part 42 is made from the viewpoint which makes the protrusion part 42 protrude toward the non-skin side sheet | seat 3 which is a wearer's non-skin side, and the absorption amount of the liquid of the absorptive core 41 is ensured. The thickness of the first region 41F and the second region 41R is preferably 120% (that is, 1.2 times) or more, more preferably 140% or more, and preferably 700% or less, more preferably It is preferably 500% or less, and preferably 120% or more and 700% or less, and more preferably 140% or more and 500% or less, from the viewpoint of suppressing followability to the body and uncomfortable feeling when worn. The protrusion height represented by the difference in thickness between the thickness of the protrusion 42 and the thickness of the first region 41F or the second region 41R (the former-the latter) is preferably 1.0 mm or more, more preferably 2. 0 mm or more, preferably 8.0 mm or less, more preferably 6.0 mm or less, and preferably 1.0 mm or more and 8.0 mm or less, more preferably 2.0 mm or more and 6.0 mm or less. . The above-described configuration is particularly effective when the protruding portion 42 is provided in the excretion facing area B like the napkin 1 of the present embodiment.

The thickness of the protrusion 42 is preferably 2.0 mm or more, more preferably 3.0 mm or more, preferably 10.0 mm or less, more preferably 7.0 mm or less, and preferably 2 mm. It is 0.0 mm or more and 10.0 mm or less, More preferably, it is 3.0 mm or more and 7.0 mm or less. In addition, although it is preferable that the relationship of the thickness is in the entire range of the projecting portion 42, in the case where the increase / decrease is provided in the thickness direction of the projecting portion 42, the relationship is the above in the thickest portion. It only has to be.
It is preferable that the thickness is in the above range in the entire range of the protruding portion 42, but in the thickness direction of the protruding portion 42, a gradual thickness increase / decrease is provided in the horizontal direction Y or the vertical direction X or in both directions. In such a case, it is only necessary to satisfy the above-mentioned relationship in the thickest part.

The thickness of the first region 41F or the second region 41R is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 7.0 mm or less, more preferably 3.5 mm or less. In the napkin 1, which is preferably 0.5 mm or more and 7.0 mm or less, more preferably 1.0 mm or more and 3.5 mm or less, the thickness of the first region 41F or the second region 41R includes a groove 45 described later. It is preferable that the portion not formed is formed substantially uniformly, but in the case where a gradual increase or decrease in thickness is provided in the horizontal direction Y or the vertical direction X of the first region 41F or the second region 41R. It is sufficient that the above relationship is satisfied in the thickest part.
The thickness of each part of the absorbent core 41 such as the protruding portion 42, the first region 41F or the second region 41R, and the protruding adjacent portion 44 described later is measured by the following method.

<Method for measuring thickness of each part of absorbent core 41>
The absorbent core is allowed to stand in a horizontal place so as not to be wrinkled or bent, and the protruding portion 42, the first region 41F, the second region 41R, or the like, which is a measurement object, is cut out from the absorbent core 41. And the thickness under the load of 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 planar or square plate (acrylic having a thickness of about 5 mm) having a size adjusted so that the load is 5 cN / cm ² between the tip of the thickness meter and the cut object to be measured. Plate) and measure the thickness. When measuring the thickness of the first region 41 F or the second region 41 R 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 protruding portion 42 in the absorbent core 41 is such that the protruding portion 42 protrudes toward the non-skin-side sheet 3 on the non-skin side of the wearer, and the amount of liquid absorbed by the absorbent core 41. Is preferably 100 g / m ² or more, more preferably 200 g / m ² or more, and preferably 1500 g / m ² or less, more preferably 1200 g / m ² or less. Preferably, it is 100 g / m ² or more and 1500 g / m ² or less, more preferably 200 g / m ² or more and 1200 g / m ² or less. The basis weight of the first region 41F or the second region 41R in the absorbent core 41 is preferably 50 g / m ² or more, more preferably 100 g / m ² or more, and preferably 1000 g / m. ² or less, more preferably 900 g / m ² or less, specifically preferably 50 g / m ² or more and 1000 g / m ² or less, more preferably 100 g / m ² or more and 900 g / m ² or less. The basis weight of the first region 41F or the basis weight of the second region 41R is the protruding portion 42, the first region 41F or the second region 41R cut out as described in the method for measuring the thickness of each part of the absorbent core 41 described above. The mass of the sample is divided by the area of the surface of the sample facing the skin. When measuring the basic weight of the first region 41F or the basic weight of the second region 41R in the absorbent core 41, the measurement is performed so as not to include a groove 45 described later.

In the napkin 1, the protruding portion 42 has a maximum width portion in which the length in the lateral direction Y orthogonal to the longitudinal direction X of the absorbent core 41 is maximized when the absorbent core 41 is viewed in plan view. The length in the horizontal direction Y of the part is the same as the length in the horizontal direction Y of the absorbent core 41. Preferably, the projecting portion 42 is formed in the longitudinal direction X according to both side edges along the longitudinal direction X of the absorbent core 41 when the absorbent core 41 is viewed in plan as shown in FIG. A projecting central portion 421 formed to extend to a predetermined length is provided. In other words, the protruding central portion 421 extends in a band shape between both side edges 41 s and 41 s along the longitudinal direction X of the absorbent core 41, and extends over the entire length in the vertical direction X of the band-shaped protruding central portion 421. The protrusion 42 has the maximum width portion. The length in the lateral direction Y of the maximum width portion of the protruding center portion 421 is the same as the maximum width in the intermediate region 41M of the absorbent core 41. Here, the width of the absorbent core 41 means the width of the absorbent core 41 including the protruding portion 42. That is, when the projecting portion 42 is viewed in a cross-section in the lateral direction Y, the projecting portion located on the non-skin facing surface side with respect to the height position of the surface on the non-skin facing surface side of the adjacent first region 41F and second region 41R. If the width (non-skin side width) of 42 is the same as or larger than the width (skin side width) of the protruding portion 42 located on the skin facing surface side, the maximum width of the protruding portion 42 is the same as the width of the absorbent core 41. is there. However, it is desirable that the maximum width portion of the projecting portion 42 has substantially the same skin side width and non-skin side width, and particularly preferably substantially uniform in the thickness direction.

In the napkin 1, as shown in FIG. 2, even if the absorbent core 41 is worn in a state where the absorbent article is somewhat shifted, the protruding central portion 421 has an excretion facing area B so that a sufficient absorption amount can be secured. It is preferable to make the area as wide as possible in the region of the excretion facing area B. From such a point of view, it is preferable that the protruding central portion 421 has a constant interval between the side edges 41s and 41s along the longitudinal direction X of the absorbent core 41 in the maximum width portion, and the side edges 41s and 41s are It is more preferable that each of them is parallel to the longitudinal direction X and is linear. However, at the time of manufacture, the protruding portion 42 is caused by a positional deviation in the lateral direction Y of the protruding portion 42 in the absorbent core 41, a chipping of the protruding portion 42, a draft of the mold caused by the production method, rounding or chamfering of the end portion, and the like. And the width of the absorbent core 41 are slightly different, for example, within the range of a difference of about 5% of the width of the maximum width portion, the same width is used. The maximum width means the distance at the longest position in the lateral direction Y. In the napkin 1, the length in the lateral direction Y at the maximum width portion in the lateral direction Y of the projecting portion 42 is the same as the maximum length in the lateral direction Y in the intermediate region 41M of the absorbent core 41. This is the same as the maximum length of the core 41 in the lateral direction Y. Thereby, even if the napkin 1 is worn in a slightly shifted state, a sufficient amount of absorption can be ensured, and leakage is less likely to occur.

In the napkin 1, the protruding central portion 421 of the protruding portion 42 is reduced in thickness from the central portion in the lateral direction Y toward the side edges along the vertical direction X as shown in FIG. 3. Is formed. That is, the central portion arranged on the center line CL extending in the vertical direction X in the protruding central portion 421 is formed with the largest thickness. Thus, if the protrusion center part 421 is formed, the absorption amount of the liquid in the excretion opposite area B can fully be ensured.

In the napkin 1, the protruding central portion 421 of the protruding portion 42 has a smaller basis weight from the central portion in the lateral direction Y toward the side edges along the vertical direction X as shown in FIG. It is formed as follows. That is, the center portion arranged on the center line CL extending in the vertical direction X in the protruding center portion 421 is formed with the largest basis weight. When the projecting central portion 421 is formed in this manner, the liquid absorbability and the like in the excretion facing area B can be improved.

The protruding center portion 421 of the napkin 1 has a thickness at the side edge 41s having the smallest thickness of the thickness (T1) of the center portion disposed on the center line CL in a cross-sectional view as shown in FIG. The ratio (T1 / T2) to (T2) is preferably 1.1 or more, particularly 1.3 or more, from the viewpoint that the projecting part can be adhered to the excretion part as much as possible, and is uncomfortable when worn. Is preferably 4 or less, particularly 3 or less, specifically 1.1 or more and 4 or less, particularly preferably 1.3 or more and 3 or less.

Further, the projecting portion 42 bulges out from the projecting central portion 421 toward the front section A side or the rear section C side so that the length in the lateral direction Y is narrower than the maximum width portion of the projecting section 42. A convex part 422 or a rear side convex part 423 is provided. In other words, the protruding portion 42 is a front-side protruding portion that is convex from the front end portion in the longitudinal direction X of the protruding central portion 421 toward the first region 41F side in a plan view of the absorbent core 41 as shown in FIG. 422 and at least one of a rear-side convex part 423 that is convex toward the second region 41R side from the rear end part of the longitudinal direction X of the projecting central part 421. In the napkin 1, the projecting part 42 is The front side convex portion 422 and the rear side convex portion 423 are provided. That is, in the napkin 1, the projecting portion 42 is divided into a front convex portion 422, a projecting central portion 421, and a rear convex portion 423.

In the napkin 1, as shown in FIG. 2, in the absorbent core 41, one front convex portion 422 is arranged at the front end portion of the projecting central portion 421, and the rear convex portion 423 is the rear end portion of the projecting central portion 421. One is arranged in. The front side convex part 422 is arranged on the center line CL in which the top part 422t of the front side convex part 422 extends in the vertical direction X, and both

side edges

422s and 422s forming the front side convex part 422 are the top parts 422t. To a side edge 41 s along the longitudinal direction X of the absorbent core 41. Similarly to the front side convex part 422, the rear side convex part 423 is arranged on the center line CL in which the top part 423 t of the rear side convex part 423 extends in the vertical direction X, and both sides forming the rear side convex part 423. 423s and 423s extend from the top portion 423t to the side edge 41s along the longitudinal direction X of the absorbent core 41, respectively.

In the napkin 1, as shown in FIG. 2, the front convex portion 422 and the rear convex portion 423 in the absorbent core 41 are respectively apexes 422 t that are located in the central portion in the lateral direction Y from both side portions along the longitudinal direction X. , 423t, the width d gradually decreases. Preferably, in the front convex part 422 in the absorbent core 41 of the napkin 1, the distance (width d) between the side edges 422s and 422s is from the side edges 41s and 41s along the longitudinal direction X of the absorbent core 41 to the top part 422t. It is gradually decreasing. Similarly, in the rear side convex portion 423 of the absorbent core 41 of the napkin 1, the distance (width d) between the side sides 423s and 423s is from the side edges 41s and 41s along the longitudinal direction X of the absorbent core 41 to the top portion 423t. It is gradually decreasing. Here, the width d gradually decreasing means that the width d continuously decreases gradually toward the

top portions

422t and 423t.

The absorbent core 41 in the napkin 1 will be described by taking the front convex part 422 of the front convex part 422 and the rear convex part 423 as an example. As shown in FIG. It extends straight without bending. The angle α formed by the one side 422s and the center line CL extending in the vertical direction X is preferably 20 ° or more, more preferably 30 from the viewpoint of improving fit to the body shape and followability in movement. And more preferably 75 ° or less, more preferably 60 ° or less, and specifically preferably 20 ° or more and 75 ° or less, and more preferably 30 ° or more and 60 ° or less. The rear side convex portion 423 is the same as the front side convex portion 422.

As shown in FIG. 2, the overall length L2 in the longitudinal direction X of the protruding portion 42 is in the longitudinal direction X of the absorbent core 41 from the viewpoint of ensuring both the amount of absorption of body fluid and the fit when the napkin 1 is worn. The total length L1 is preferably 25% or more, more preferably 30% or more, preferably 80% or less, more preferably 75% or less, and preferably 25% or more and 80% or less, more preferably 30% or more and 75% or less.
In addition, the full length L1 shows the distance in the longest position in the vertical direction X of the absorptive core 41, and the full length L2 means the distance in the longest position in the vertical direction X of the protrusion part 42.

From the viewpoint of sufficiently securing the amount of body fluid absorbed, as shown in FIG. 2, the total length L3 in the vertical direction X of the protruding central portion 421 constituting the protruding portion 42 is preferably 20% or more of the total length L2 of the protruding portion 42. More preferably, it is 30% or more, preferably 80% or less, more preferably 70% or less, and preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less.

The total length L4 in the vertical direction X of the front convex portion 422 constituting the protrusion 42 is preferably 5% or more, more preferably 10% or more, of the total length L2 of the protrusion 42, as shown in FIG. Further, it is preferably 50% or less, more preferably 30% or less, and preferably 5% or more and 50% or less, more preferably 10% or more and 30% or less. The total length X in the vertical direction X of the rear convex portion 423 constituting the protrusion 42 is the same as the total length L4 in the vertical direction X of the front convex portion 422.
The total length L4 means the distance at the longest position in the longitudinal direction X of the front convex portion 422.

In the napkin 1, as shown in FIGS. 2, 4, and 5, the absorbent core 41 has a protruding boundary groove 43 that defines a boundary between the protruding portion 42 and a portion other than the protruding portion 42 in the intermediate region 41M. ing. The protruding boundary groove 43 is formed to be recessed from the non-skin facing surface side in the absorbent core 41 toward the skin facing surface side. The projecting boundary groove 43 is formed so as to protrude convexly from the non-skin facing surface on the non-skin-side sheet 3 side in the absorbent core 41 toward the skin-side sheet 2 side, and the top part that is the top of the cavity of the groove It is formed on the skin side sheet 2 side. For this reason, when the napkin 1 is worn, the absorbent body 4 is easily bent from the protruding boundary groove 43 with respect to the force acting on the inner side in the lateral direction Y of the absorbent core 41 from the legs, so that the napkin 1 has a body shape. It becomes easy to fit three-dimensionally along.

In the napkin 1, as shown in FIG. 2, the projecting boundary groove 43 includes a front projecting boundary groove 43a extending along both

sides

422s and 422s forming the front convex part 422 constituting the projecting part 42, and a rear side. It has the back protrusion boundary groove part 43c extended along the both

sides

423s and 423s which form the side convex part 423. As shown in FIG. The front protruding boundary groove 43a and the rear protruding boundary groove 43c are formed over the entire length (full width) of the absorbent core 41 in the lateral direction Y. For this reason, it is hard to produce a vertical wrinkle in the vertical direction of the napkin 1 with respect to the force which acts on the inner side of the absorbent core 41 in the lateral direction Y, and the napkin 1 fits three-dimensionally along the shape of the body. It becomes easy. Thus, in the absorptive core 41, the boundary with the protrusion part 42 is demarcated by the front protrusion boundary groove part 43a and the back protrusion boundary groove part 43c.

In the napkin 1, the groove width of the protruding boundary groove portion 43 in the absorbent core 41 is preferably 0.1 mm or more, more preferably 0.5 mm or more, from the viewpoint of improving the liquid absorbency and the like in the excretion facing area B. Preferably, it is 5.0 mm or less, more preferably 3.0 mm or less, 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. is there. In addition, the groove width and the thickness described later of the protruding boundary groove 43 are cut in a direction orthogonal to the extending direction of the protruding boundary groove 43 and measured from a photograph of the cut end surface.
In the napkin 1, the thickness of the protruding boundary groove 43 in the absorbent core 41 (the thickness of the absorbent core 41 at the top of the groove) is preferably from the viewpoint of improving the liquid absorbency and the like in the excretion facing area B, 0.08 mm or more, more preferably 0.15 mm or more, preferably 7.0 mm or less, more preferably 3.5 mm or less, and preferably 0.08 mm or more, 7.0 mm or less, More preferably, it is 0.15 mm or more and 3.5 mm or less.

In the napkin 1, the basis weight of the protruding boundary groove portion 43 is lower than the basis weight of the protruding portion 42, and further, the basis weight is higher than the basis weight of the first region 41F and the basis weight of the second region 41R in the absorbent core 41. It is formed low. Here, the basis weight of the first region 41F and the basis weight of the second region 41R mean the basis weight of the portion excluding the groove portion 45 when the groove portion 45 described later is included. The basis weight of the protruding boundary groove 43 is preferably 10 g / m ² or more, more preferably 20 g / m ² or more, and preferably 350 g / m ² or less, more preferably 250 g / m ² or less. Specifically, 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 the protrusion boundary groove part 43 is the skin facing surface side of the sample of the part of the protrusion boundary groove part 43 cut out as described in the method for measuring the thickness of each part of the absorbent core 41 described above. Divide by the area of the surface.

In the napkin 1, the absorptive core 41 has the protrusion adjacent part 44 in the area | region except the protrusion part 42 in the intermediate | middle area | region 41M, and also the protrusion boundary groove part 43, as shown in FIG. In the napkin 1, the intermediate region 41 M in the absorbent core 41 includes a protruding portion 42, a protruding boundary groove portion 43, and a protruding adjacent portion 44. The projecting adjacent portion 44 includes a front projecting adjacent portion 44a disposed on the first region 41F side adjacent to the front projecting portion 422 constituting the projecting portion 42 and a rear projecting portion constituting the projecting portion 42 in the intermediate region 41M. A rear projecting adjacent portion 44c disposed on the second region 41R side adjacent to the portion 423. The forward projecting adjacent portion 44a is formed symmetrically with respect to the center line CL extending in the vertical direction X. In the forward projecting adjacent portion 44a, a half portion on the side edge 41s side along the longitudinal direction X of the absorbent core 41 with respect to the center line CL has a length in the longitudinal direction X centered from the one side edge 41s. It is formed so as to gradually decrease toward the line CL. The rearward protruding adjacent portion 44c is also formed symmetrically with respect to the center line CL extending in the vertical direction X, like the forward protruding adjacent portion 44a. In the rear projecting adjacent portion 44c, the half portion on the side edge 41s side along the longitudinal direction X of the absorbent core 41 with respect to the center line CL has a length in the longitudinal direction X centered from the one side edge 41s. It is formed so as to gradually decrease toward the line CL.

In the napkin 1, as shown in FIGS. 4 and 5, the protruding adjacent portion 44 is formed on the non-skin side of the top of the cavity in the protruding boundary groove portion 43, in other words, on the skin side sheet 2 side in the protruding boundary groove portion 43. Projecting toward the sheet 3. Further, the projecting adjacent portion 44 has a flat skin facing surface. And the protrusion adjacent part 44 is formed so that the thickness is larger than the thickness of the protrusion boundary groove part 43 and smaller than the thickness of the protrusion part 42 in the absorbent core 41. Furthermore, from the viewpoint of followability to the movement of the body, it is preferable that the thickness of the protruding adjacent portion 44 is the same as or smaller than the thickness of the first region 41F and the thickness of the second region 41R. From the viewpoint of the strength of the absorbent core 41 when it is repeatedly deformed with respect to body movement, the protruding adjacent portion 44 has a thickness greater than the thickness of the first region 41F and the thickness of the second region 41R. May be.
The thickness of the protruding adjacent portion 44 is preferably 0.5 mm or more, more preferably 1.0 mm or more, preferably 10.0 mm or less, more preferably 7.0 mm or less, and preferably 0.0 mm or less. It is 5 mm or more and 10.0 mm or less, more preferably 1.0 mm or more and 7.0 mm or less.
The thickness of the protruding adjacent portion 44 is measured based on the method for measuring the thickness of each portion of the absorbent core 41 described above.

In the napkin 1, the protruding adjacent portion 44 is formed so that the basis weight thereof is smaller than the basis weight of the protruding portion 42 of the absorbent core 41 and larger than the basis weight of the protruding boundary groove portion 43. Furthermore, from the viewpoint of followability to body movement, the protruding adjacent portion 44 has a basis weight equal to or less than the basis weight of the first region 41F and the second region 41R in the absorbent core 41. Is preferred. In addition, from the viewpoint of the strength of the absorbent core 41 when it is repeatedly deformed with respect to body movement, the protruding adjacent portion 44 has a basis weight that is greater than the basis weight of the first region 41F and the basis weight of the second region 41R. May also be larger. Here, the basis weight of the first region 41 F and the basis weight of the second region 41 R mean the basis weight of the portion excluding the groove portion 45 when having the groove portion 45. The basis weight of the protruding adjacent portion 44 is preferably 20 g / m ² or more, more preferably 50 g / m ² or more, and preferably 800 g / m ² or less, more preferably 700 g / m ² or less. Specifically, it is preferably 20 g / m ² or more and 800 g / m ² or less, more preferably 50 g / m ² or more and 700 g / m ² or less. In addition, the basic weight of the protrusion adjacent part 44 is the surface on the skin facing surface side of the sample of the protrusion adjacent part 44 cut out as described in the method for measuring the thickness of each part of the absorbent core 41 described above. Divide by the area of

In the napkin 1, the first region 41F and the second region 41R in the absorbent core 41 are each formed of a groove portion 45 having a relatively small basis weight and a small absorbent portion 46 having a relatively large basis weight, as shown in FIG. And have. 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. As described above, in the first region 41F and the second region 41R, the groove portion (horizontal groove 45Y) extending in the horizontal direction Y is arranged, and the groove portion (vertical groove 45X) extending in the vertical direction X is arranged. 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 absorption part 46 is arranged at the position of the grid defined by the vertical groove 44Y and the horizontal groove 44X. The thickness and basis weight of the first region 41F and the second region 41R described above mean the thickness and basis weight of the small absorbent portion 46. The basis weight of the groove portion 45 composed of the vertical groove 45X and the horizontal groove 45Y is formed so that the basis weight of the absorbent core forming material is lower than the small absorbent portion 46 which is a portion other than the groove portion in the first region 41F and the second region 41R. ing.

In the napkin 1, the absorbent core 41 having the groove portion 45 and the small absorbing portion 46 in the first region 41F and the second region 41R, and having the protruding portion 42, the protruding boundary groove portion 43, and the protruding adjacent portion 44 in the intermediate region 41M, 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

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. 6A, 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. 6A, one concave portion 56 b for forming the intermediate region 41 M of the absorbent core 41 is formed on a part of the bottom surface 56 of the single accumulation concave portion 55. . In addition, a first breathable member 57 for forming a projecting boundary groove 43 that separates the projecting portion 42 and the projecting adjacent portion 44 is disposed on the bottom surface of the recess 56b. The first breathable member 57 is disposed at a position corresponding to the protruding boundary groove 43 and is fixed so as to protrude from the bottom surface of the recess 56b. In addition, a second breathable member 58 for forming the groove 45 is disposed on the bottom surface 56 of the upstream region and the downstream region in the rotation direction R adjacent to the recess 56b. The second breathable member 58 is disposed at a position corresponding to the vertical groove 44Y and the horizontal groove 44X, and is fixed so as to protrude from the bottom surface 56 of the accumulation recess 55. The first breathable member 57 and the second breathable member 58 may be non-breathable members, and are made of, for example, metal, plastic, ceramic, or the like.

In the same manner as a known fiber stacking device including a fiber stacking drum, a core material in which a water-absorbing polymer and pulp fibers are mixed is supplied into a duct while sucking from the bottom surface of the accumulation concave portion 55, thereby obtaining FIG. 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 protrusion 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 second region 41R in the absorbent core 41 having a relatively small basis weight. Moreover, the top part of the protrusion boundary groove part 43 in which the part which consists of core material deposited on the 1st air-permeable member 57 of the recessed part 56b is relatively smaller than the basic weight of the 1st area | region 41F and the basic weight of the 2nd area | region 41R. It becomes. 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 concave portion 56b becomes the top portion of the groove portion 45 that is relatively smaller than the basis weight of the small absorbent portion 46. . Cores deposited on the first breathable member 57 and the second breathable member 58 from the upstream region adjacent to the recess 56b to the downstream region, including the top of the protruding boundary groove 43 and the top of the groove 45. A portion made of the material becomes a continuous layer RS having a uniform thickness.

The formation material of each structural member of the napkin 1 of this embodiment mentioned above is demonstrated.
The skin side sheet 2 that forms the skin facing surface is made of a material that has liquid permeability and includes a thermoplastic synthetic resin. For example, a fiber nonwoven fabric such as an air-through fiber nonwoven fabric, a spunbond nonwoven fabric, or a point bond nonwoven fabric is suitable. Can be used. Examples of the thermoplastic resin include, but are not limited to, olefin polymers such as ethylene and propylene, or polyethylene terephthalate. For example, the skin-side sheet 2 preferably has a basis weight of 10 to 100 g / m ² and a thickness of 0.5 to 5.0 mm. Moreover, the skin side sheet | seat 2 can use the thing similar to what was conventionally used in the said technical field without a restriction | limiting especially, A perforated film etc. can also be used.

The non-skin-side sheet 3 is made of a material having poor liquid permeability or impermeability and containing a thermoplastic synthetic resin. For example, a synthetic resin film, a laminate of a synthetic resin film and a nonwoven fabric, or a span Water-repellent nonwoven fabric with high water pressure resistance such as bond-meltblown-spunbond laminated fiber nonwoven fabric, air-through fiber nonwoven fabric, point bond fiber nonwoven fabric, spunbond fiber nonwoven fabric, etc. can be used, but is not limited to these, The thing similar to what was conventionally used in the said technical field can be especially used without a restriction | limiting. For example, the non-skin side sheet 3 preferably has a basis weight of 10 to 50 g / m ² and a thickness of 8 to 200 μm.

The core material of the absorbent core 41 includes a fiber assembly made of a fiber material such as pulp fiber. As the fiber material, various materials conventionally used for absorbent articles of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, pulp fibers, rayon fibers, cotton Short fibers of cellulosic fibers such as fibers, short fibers of synthetic fibers such as polyethylene, and the like are used. These fibers can be used alone or in combination of two or more. The fiber material is preferably entirely or partly pulp fiber, and the ratio of the pulp fiber in the fiber material is preferably 50 to 100% by mass, more preferably 80 to 100% by mass, More preferably, it is 100 mass%.
The absorbent core 41 may contain a water-absorbing polymer. Examples of water-absorbing polymers include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride) copolymer. Examples thereof include a polymer and a saponified product thereof, and polyaspartic acid. By containing the water-absorbing polymer, it is possible to more quickly absorb and retain a large amount of excretory fluid such as blood.
Moreover, you may mix | blend a deodorizer, an antibacterial agent, etc. with the absorptive core 41 as needed.

Examples of the core wrap sheet (not shown) for covering the absorbent core 41 include tissue paper and water permeable nonwoven fabric. The absorbent body 4 is formed by covering the upper and lower surfaces of the absorbent core 41 with a core wrap sheet (not shown). The core wrap sheet (not shown) is used for the purpose of preventing leakage of the forming material of the absorbent core 41 or improving the shape retention of the absorbent core 41. A core wrap sheet (not shown) for covering the skin facing surface side of the absorbent core 41 and the skin side sheet 2 and a core wrap sheet (not shown) for covering the non-skin facing surface side of the absorbent core 41; It is preferable that the non-skin side sheet 3 is bonded to each other by a pattern-coated adhesive such as a dot, a spiral, or a stripe.

As the side sheet 5, various types conventionally used in the technical field can be used without particular limitation, for example, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like. Can be used. As other materials, for example, a spunbond nonwoven fabric, a sheet (for example, SM, SMS, SMMS, etc.) in which a spunbond nonwoven fabric (S) and a melt blown nonwoven fabric (M) are combined, a heat roll nonwoven fabric, an air-through nonwoven fabric, etc. A water-repellent (hydrophobic) non-woven fabric may be mentioned.

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.
The linear pressing groove 7 (the first horizontal pressing groove 71, the second horizontal pressing groove 72, and the vertical pressing groove 73) is a pressing process (so-called embossing) with or without heat, or an embossing process such as ultrasonic embossing. Can be formed according to a conventional method.

The effect of the napkin 1 of this embodiment mentioned above is demonstrated.
As shown in FIGS. 1 and 2, the napkin 1 has a protrusion 42 protruding toward the non-skin side sheet 3 in the intermediate region 41M of the absorbent core 41. The protrusion 42 is shown in FIG. As described above, when the absorbent core 41 is viewed in plan, the absorbent core 41 has a maximum width portion in which the length in the lateral direction Y is maximum, and the length in the lateral direction Y of the maximum width portion is the absorbency. This is the same as the length in the lateral direction Y of the intermediate region 41M of the core 41. Therefore, even if the napkin 1 which is an absorbent article is worn in a slightly shifted state, a sufficient amount of absorption can be ensured. Moreover, since the skin facing surface of the protrusion 42 is formed flat, the skin facing surface of the protrusion 42 in the absorbent core 41 is in close contact with a core wrap sheet (not shown) that covers the absorbent core 41. Easy to do. And in the part corresponding to the skin opposing surface of the protrusion part 42, the absorber 4 and the skin side sheet | seat 2 are easy to closely_contact | adhere. As a result, on the skin-facing surface, the excretory liquid that has reached the absorbent core 41 diffuses quickly in the horizontal direction, and liquid return or the like is less likely to occur due to further improvement in the amount of absorption and increase in the absorption speed. Moreover, it is hard to produce a level | step difference between a wearer's skin and the napkin 1, and it is hard to give a wearer a discomfort by being excellent in the fitting property to a body shape. In particular, the napkin 1 has a continuous layer RS having a uniform thickness extending from the first region 41F through the intermediate region 41M to the second region 41R on the skin facing surface of the absorbent core 41. The difference in level between the skin and the napkin 1 is less likely to occur, and the fit to the body shape is improved. Moreover, since the thickness of the protrusion 42 provided in the intermediate region 41M of the absorbent core 41 is greater than the thickness of the first region 41F and the second region 41R of the absorbent core 41, the napkin 1 is being worn. 4 and 5, a space between the skin facing surface of the absorbent core 41 and the non-skin side sheet 3 or core wrap sheet (not shown) in the front-rear region in the longitudinal direction X of the protrusion 42. K is easily present, and the space K easily deforms the napkin 1 in the longitudinal direction X into a shape excellent in cushioning properties, thereby improving fit.

In particular, in the napkin 1, the maximum width portion has a protruding central portion 421 formed to extend to a predetermined length in the longitudinal direction X along both side edges along the longitudinal direction X of the absorbent core 41. Therefore, it is possible to increase the amount of excreted fluid absorbed, and when the napkin 1 that is an absorbent article is worn in a slightly shifted state, the body movement during wearing, the body posture during sleeping, etc. However, sufficient absorption performance can be expressed. Furthermore, since there is no step between the skin-side sheet 2 and the absorbent core 41, the excretory liquid is quickly absorbed by the absorbent core 41 and travels through the gap between the skin-side sheet 2 and the absorbent core 41. It is difficult to cause side leakage. In addition, the projecting portion 42 has a projecting central portion 421 and a front convex portion that is convex from the front end portion in the longitudinal direction X of the projecting central portion 421 toward the first region 41F in plan view as shown in FIG. 422 and the rear side convex part 423 which protrudes from the rear-end part of the vertical direction X of the protrusion center part 421 toward the 2nd area | region 41R side. Therefore, even if the napkin 1 is worn in a slightly displaced state, if the protruding portion 42 has either the front side convex portion 422 or the rear side convex portion 423, the napkin 1 By deforming the front-side convex portion 422 and the rear-side convex portion 423 with respect to the force inward in the lateral direction Y, the protruding portion 42 has excellent followability to the body shape, and makes it difficult for the wearer to feel uncomfortable. . In the napkin 1, since the protrusion part 42 has both the front side convex part 422 and the back side convex part 423, the said effect can be exhibited further.

In addition, as shown in FIG. 2, the napkin 1 has a top portion in which the front-side convex portion 422 and the rear-side convex portion 423 in the absorbent core 41 are located in the center portion in the horizontal direction Y from both side portions along the vertical direction X. The width d is formed so as to gradually decrease toward 422t and 423t. Therefore, even if the napkin 1 is worn in a slightly shifted state, the followability to the body shape is further improved, and it is difficult to give the wearer a sense of incongruity.

Moreover, the napkin 1 has the protrusion part 42 and the protrusion boundary groove part 43 which divides parts other than the protrusion part 42 in the intermediate area 41M in the absorptive core 41, as shown in FIG. As shown in FIGS. 4 and 5, the protruding boundary groove 43 is formed to be recessed from the non-skin facing surface side to the skin facing surface side in the absorbent core 41. Therefore, it is easy to bend | fold from the protrusion boundary groove part 43, and it is hard to give a wearer an uncomfortable feeling. In particular, in the napkin 1, the protruding boundary groove 43 is formed so that the basis weight is lower than the basis weight of the first region 41F and the second region 41R in the absorbent core 41. Therefore, it is easier to bend from the protruding boundary groove 43, and it is difficult for the wearer to feel uncomfortable. Furthermore, the protruding boundary groove 43 is formed over the entire length in the lateral direction Y of the absorbent core 41, so that the wearer's body shape and movement are also present in the lateral edge portion of the absorbent core 41 in the lateral direction Y. It becomes easy to bend according to, and fit nature improves further.

Further, as shown in FIG. 2, the napkin 1 has a front projecting adjacent portion disposed on the first region 41 F side adjacent to the front convex portion 422 constituting the projecting portion 42 in the intermediate region 41 M of the absorbent core 41. 44a and a rear projecting adjacent portion 44c disposed on the second region 41R side adjacent to the rear convex portion 423 constituting the projecting portion 42. As shown in FIGS. 4 and 5, the protruding adjacent portion 44 protrudes toward the non-skin-side sheet 3 from the top of the cavity in the protruding boundary groove portion 43, and the skin facing surface is the protruding portion 42. Similar to the skin-facing surface, it is formed flat. Therefore, even in a portion corresponding to the protruding boundary groove 43, a step is hardly generated between the wearer's skin and the napkin 1, and it is difficult to give the wearer a sense of incongruity due to excellent fit to the body shape. Further, in the napkin 1, the basis weight of the protruding adjacent portion 44 is smaller than the basis weight of the first region 41F and the second region 41R in the absorbent core 41 and larger than the basis weight of the protruding boundary groove portion 43. Since it is formed, even if the napkin 1 is worn in a slightly displaced state, sufficient absorption performance can be exhibited.

In addition, as shown in FIG. 2, the napkin 1 has a relatively small basis weight small absorbent portion 46 and a relatively small basis weight groove portion 45 in the first region 41 F and the second region 41 R of the absorbent core 41. Therefore, it is easy to bend | fold from the groove part 45 as a starting point, and it is hard to give a wearer an uncomfortable feeling. In the napkin 1, the absorbent core 41 having the groove portion 45 and the small absorbing portion 46 in the first region 41F and the second region 41R, and the protruding portion 42, the protruding boundary groove portion 43, and the protruding adjacent portion 44 in the intermediate region 41M is integrated. Because it is molded, it has excellent fit to the body shape and does not give the wearer a sense of incongruity.

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, in the napkin 1, as shown in FIGS. 1 and 2, the intermediate region 41M of the absorbent core 41 is disposed within the region of the excretion facing area B of the napkin 1, and the intermediate region 41M of the absorbent core 41 and Although it does not coincide with the excretion facing area B of the napkin 1, it may coincide. That is, when the napkin 1 has a pair of wing portions 1W on both outer sides in the lateral direction Y like the napkin 1, the roots of the wing portions 1W arranged at intervals in the vertical direction X in each wing portion 1W. The intermediate region 41M may be present between the two. More specifically, the intermediate region 41M of the napkin 1 may be present between the roots of the wing portions 1W arranged at intervals in the vertical direction X of each wing portion 1W. The size of the front area A of the napkin 1 and the size of the first area 41F of the absorbent core 41 substantially coincide with each other, and the size of the rear area C of the napkin 1 and the size of the second area 41R of the absorbent core 41 are the same. Are substantially equal to each other, the length in the vertical direction X of the intermediate region 41M of the napkin 1 is between the roots of the wing parts 1W arranged at intervals in the vertical direction X in each wing part 1W. It is the same as the length. Even if it arrange | positions in this way, the effect similar to the napkin 1 mentioned above can be acquired.

Note that the napkin 1 of the present embodiment is preferably a so-called sanitary napkin for night use having a total length of 30 cm or more in the longitudinal direction X, from the viewpoint that a sufficient amount of absorption is required.

Moreover, in the front side convex part 422 in the absorptive core 41 of the napkin 1, as shown in FIG. 2, both

sides

422s and 422s are not bent, respectively, from the side edge 41s along the longitudinal direction X of the absorptive core 41. It extends straight and straight toward the top portion 422t, and the width d of the front convex portion 422 gradually decreases from the side edge 41s along the longitudinal direction X of the absorbent core 41 toward the top portion 422t. However, if the width d of the front-side convex portion 422 is merely gradually reduced, it may be gradually reduced. The front-side convex portion 422 extends straight and straight, and the width d of the front-side convex portion 422 gradually decreases from both

side edges

41s, 41s along the longitudinal direction X of the absorbent core 41 toward the top portion 422t. By doing, it is preferable from the point that the mold release property at the time of releasing from the said accumulation recessed part 55 in the said fiber stacking apparatus improves in addition to the improvement to the fitting property to a body. The same applies to the rear convex portion 423.

Also, the first region 41F and the second region 41R of the napkin 1 have the same thickness, but may have different thicknesses as long as the thickness is smaller than the thickness of the protruding portion 42. Moreover, although the basic weight of the 1st area | region 41F and the 2nd area | region 41R of the napkin 1 is the same as long as it is smaller than the basic weight of the protrusion part 42, a mutually different basic weight may be sufficient. Further, the first region 41F and the second region 41R of the napkin 1 have the groove 45 and the small absorption portion 46, but may not have the groove 45 and the small absorption portion 46 having different shapes. You may do it.

Moreover, although the whole absorptive core 41 of the napkin 1 is integrally molded, it does not need to be integrally molded. For example, in the absorptive core 41, the core material is formed at the same height from the first region 41F to the second region 41R, and then the core material formed by another core material is arranged and protruded. The part 42 may be formed.

Further, as shown in FIG. 1, the napkin 1 is provided with side sheets 5 on both side portions along the longitudinal direction X on the skin facing surface of the skin side sheet 2, but from the viewpoint of preventing side leakage of body fluids. Further, an elastic member that is stretched in the longitudinal direction X may be disposed on the free end portion of the side seat 5 to form a leak-proof cuff that can stand toward the wearer.

Further, as shown in FIG. 1, the napkin 1 has a pair of

wing portions

1W and 1W on both the left and right sides along the longitudinal direction X of the excretion facing area B, but has a pair of

wing portions

1W and 1W. It does not have to be. Moreover, in addition to a pair of

wing parts

1W and 1W, you may have a pair of back flaps in the right-and-left both sides along the vertical direction X of the back area C.

Moreover, in the napkin 1 shown in FIG. 1, it has a pair of vertical pressing groove | channel 73 extended in the vertical direction X of the absorbent core 41 as a linear groove | channel where the skin side sheet | seat 2 and the absorbent core 41 were integrated. From the viewpoint of preventing further leakage, the vertical pressing groove 73 is formed so as to vertically cut the protruding portion 42, the protruding boundary groove portion 43, and the protruding adjacent portion 44 in the absorbent core 41 in the vertical direction X. . In addition, like the napkin 1 shown in FIG. 7, at the front and rear end portions in the longitudinal direction X in the excretion facing area B of the absorbent body 4, inside the pair of vertical pressing grooves 73 and the pair of first lateral pressing grooves 71, You may have the 2nd horizontal pressing groove 72 each extended in the horizontal direction Y. Thus, by providing the 2nd horizontal pressing groove 72 inside the napkin 1, the napkin 1 can deform | transform from the 2nd horizontal pressing groove 72, and the fitting property to skin improves more.

Moreover, like the napkin 1 shown in FIG. 8, a pair of 2nd vertical

pressing groove

73A, 73A is provided in the outer side of the horizontal direction Y of a pair of vertical

pressing groove

73, 73 along the vertical direction X of the excretion opposing area B. Also good. By providing the second vertical pressing

grooves

73A and 73A, the excretion of the excretory portion can be further prevented while maintaining the absorbability and flexibility of the first region 41F and the second region 41R. It is more preferable that the second vertical pressing

grooves

73A and 73A are arranged at the position of the intermediate region 41M in the vertical direction X from the viewpoint of twist prevention and fit.

Further, the absorbent core 41 of the napkin 1 may have the groove 45 on the skin facing surface side. Thereby, liquid diffusibility and liquid retention are improved.

Moreover, in the napkin 1, as shown in FIG. 1, although the magnitude | size of the front area A of the napkin 1 and the magnitude | size of the 1st area | region 41F of the absorptive core 41 are substantially corresponded, it does not need to correspond. . Moreover, although the magnitude | size of the back area C of the napkin 1 and the magnitude | size of the 2nd area | region 41R of the absorptive core 41 are substantially corresponded, it does not need to correspond.

The absorbent article of the present invention may be a sanitary napkin, a panty liner (cage sheet), an incontinence pad, or the like.

The following absorbent article is further disclosed regarding the embodiment of the present invention described above.

<1>
An absorbent body including a longitudinally long absorbent core corresponding to the longitudinal direction of the wearer, a skin-side sheet that covers the skin-facing surface of the absorbent body, and a non-skin side that covers the non-skin-facing surface of the absorbent body An absorbent article comprising a seat and having a front area and a rear area,
The absorbent core has an intermediate region between a first region located on the front region side and a second region located on the rear region side, and the intermediate region includes the first region and the second region. With a thicker protrusion than the thickness in the area,
The protruding portion protrudes toward the non-skin side sheet,
The protruding portion has a maximum width portion in which the length in the lateral direction orthogonal to the longitudinal direction of the absorbent core is maximized in a plan view of the absorbent core, and the lateral direction at the maximum width portion The absorbent article has the same length as the transverse length of the absorbent core.

<2>
The projecting portion includes a projecting central portion in which the maximum width portion is formed to extend to a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core, <1 The absorbent article as described in>.
<3>
The protruding portion includes a front-side convex portion or a rear-side convex portion that bulges from the protruding central portion toward the front side or the rear side so that the lateral length is narrower than the maximum width portion. The absorbent article according to <2>.
<4>
The absorbent core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region,
The absorbent article according to any one of <1> to <3>, wherein the protruding boundary groove is formed over the entire length in the lateral direction of the absorbent core.
<5>
The said protruding boundary groove part is an absorbent article as described in said <4> currently depressed from the non-skin opposing surface side in the said absorbent core toward the skin opposing surface side.
<6>
Said protruding boundary groove part is an absorbent article as described in said <4> or <5> in which basic weight is formed lower than the basic weight of said 1st area | region and said 2nd area | region in the said absorptive core.
<7>
The absorptive core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and protrudes in a region excluding the protruding portion and the protruding boundary groove portion in the intermediate region. Has an adjacent part,
<1> to <6, wherein the protruding adjacent portion has a basis weight that is smaller than a basis weight of the protruding portion and equal to or less than a basis weight of the first region and the second region in the absorbent core. > Any one of>.
<8>
The absorptivity according to <7>, wherein the protruding adjacent portion protrudes toward the non-skin side sheet from the top of the cavity in the protruding boundary groove, and the skin facing surface is formed flat. Goods.
<9>
Any one of <1> to <8>, wherein the protrusion does not have a recess having a basis weight lower than the basis weight of the first region and the second region of the absorbent core on the skin facing surface side. Or an absorbent article according to claim 1.
<10>
<1> to <9>, wherein the absorbent core has a continuous layer having a uniform thickness extending from the first region through the intermediate region to the second region on the skin facing surface. The absorbent article of any one.

<11>
The absorbent article according to any one of <1> to <10>, wherein the absorbent core is entirely formed by integral molding.
<12>
The protruding portion includes a protruding central portion formed by extending the predetermined width in the vertical direction according to both side edges along the vertical direction of the absorbent core, and a front side from the protruding central portion. A front-side convex portion and a rear-side convex portion bulged so that the length in the lateral direction is narrower than the maximum width portion toward the side and the rear side,
The front side convex portion is arranged at one front end portion in the vertical direction of the protruding central portion, and the rear side convex portion is arranged at one vertical end portion in the protruding central portion,
Each of the front-side convex portion and the rear-side convex portion is formed such that the lateral length gradually decreases from both side portions along the longitudinal direction toward the top portion located at the central portion in the lateral direction. The absorbent article according to any one of <1> to <11>.
<13>
The projecting portion includes a projecting central portion formed so that the maximum width portion extends in a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
Any one of the above <1> to <12>, wherein the projecting central part is formed so that its thickness decreases from a central part in the horizontal direction toward both side parts along the vertical direction in a cross-sectional view. Absorbent article as described in 1.
<14>
The projecting portion includes a projecting central portion formed so that the maximum width portion extends in a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
Any one of the above items <1> to <13>, wherein the protruding central part is formed so that the basis weight thereof decreases in the cross-sectional view from the horizontal central part toward both side parts along the vertical direction. 2. The absorbent article according to 1.
<15>
The absorptive core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and protrudes in a region excluding the protruding portion and the protruding boundary groove portion in the intermediate region. Has an adjacent part,
The absorptivity according to any one of <1> to <14>, wherein the protruding adjacent portion has a basis weight smaller than a basis weight of the protruding portion and larger than a basis weight of the protruding boundary groove portion. Goods.
<16>
The protruding adjacent portion is the absorbent article according to <15>, wherein the thickness of the protruding adjacent portion is the same as or smaller than the thickness of the first region and the second region in the absorbent core.
<17>
The absorbent article according to any one of <1> to <16>, wherein the total length in the vertical direction of the protrusion is 25% or more and 80% or less of the total length in the vertical direction of the absorbent core.
<18>
The projecting portion includes a projecting central portion formed so that the maximum width portion extends in a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
The absorptivity according to any one of <1> to <17>, wherein a total length in the vertical direction of the central portion of the protrusion in the protrusion is 20% or more and 80% or less of a total length in the vertical direction of the protrusion. Goods.
<19>
The absorbent core has a projecting boundary groove part that defines a boundary between the projecting part and the other part, and has a projecting adjacent part in the region excluding the projecting part and the projecting boundary groove part in the intermediate region,
The absorbent article has a pair of vertical pressing grooves extending in the longitudinal direction of the absorbent core as a linear groove in which the skin side sheet and the absorbent core are integrated by pressing.
The absorbent article according to any one of <1> to <18>, wherein the vertical pressing groove is formed to vertically cut the protruding portion, the protruding boundary groove portion, and the protruding adjacent portion. .

<20>
<19>, wherein the absorbent article has a lateral pressing groove extending in a lateral direction inside the pair of vertical pressing grooves as a linear groove in which the skin-side sheet and the absorbent core are integrated by pressing. Absorbent article as described in 1.
<21>
The absorbent article according to <19> or <20>, wherein the absorbent article has a pair of second vertical pressing grooves on an outer side in a lateral direction of the pair of vertical pressing grooves along the vertical direction of the intermediate region. Goods.
<22>
A groove portion extending in the lateral direction is disposed in the first region and the second region of the absorbent core, and the basis weight of the groove portion is absorbed from a portion other than the groove portion in the first region and the second region. The absorbent article according to any one of the above items <1> to <21>, wherein the basis weight of the forming material of the adhesive core is low.
<23>
Grooves extending in the longitudinal direction are disposed in the first region and the second region of the absorbent core, and the basis weight of the groove portions is absorbed by portions other than the groove portions in the first region and the second region. The absorbent article according to any one of <1> to <22>, wherein the basis weight of the forming material of the adhesive core is low.
<24>
The absorbent article includes a pair of wing portions on both lateral outer sides of the absorbent article, and the intermediate region exists between roots of the wing portions that are spaced apart in the vertical direction in each wing portion. The absorbent article according to any one of 1> to <23>.
<25>
The absorbent article according to <24>, wherein the intermediate region of the absorbent core exists between the roots of the wing portion.
<26>
The absorbent article according to <24> or <25>, wherein the length of the middle region of the absorbent core in the longitudinal direction is the same as the length between the roots of the wing portion.
<27>
The absorbent article according to any one of the above items <1> to <26>, further comprising leak-proof cuffs that can stand toward the wearer on both left and right sides along the front-rear direction of the absorbent article.
<28>
The absorbent article according to any one of <1> to <27>, wherein the absorbent article is a sanitary napkin having a total length of 30 cm or more.

According to the present invention, even if the absorbent article is worn in a slightly shifted state, a sufficient amount of absorption can be secured and it is difficult to give the wearer a sense of incongruity due to excellent fit to the body shape.

Claims

An absorbent body including a longitudinally long absorbent core corresponding to the longitudinal direction of the wearer, a skin-side sheet that covers the skin-facing surface of the absorbent body, and a non-skin side that covers the non-skin-facing surface of the absorbent body An absorbent article comprising a seat and having a front area and a rear area,
The absorbent core has an intermediate region between a first region located on the front region side and a second region located on the rear region side, and the intermediate region includes the first region and the second region. With a thicker protrusion than the thickness in the area,
The protruding portion protrudes toward the non-skin side sheet,
The protruding portion has a maximum width portion in which the length in the lateral direction orthogonal to the longitudinal direction of the absorbent core is maximized in a plan view of the absorbent core, and the lateral direction at the maximum width portion The absorbent article has the same length as the transverse length of the absorbent core.
The said protrusion part is provided with the protrusion center part which the said largest width part is extended and formed in predetermined length in the said vertical direction according to the both-sides edge along the said vertical direction of the said absorptive core. Absorbent article as described in 1.
The protruding portion includes a front-side convex portion or a rear-side convex portion that bulges from the protruding central portion toward the front side or the rear side so that the lateral length is narrower than the maximum width portion. The absorbent article according to claim 2.
The absorbent core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region,
The absorbent article according to any one of claims 1 to 3, wherein the protruding boundary groove is formed over the entire length in the lateral direction of the absorbent core.
The absorbent article according to claim 4, wherein the protruding boundary groove portion is formed to be recessed from the non-skin facing surface side to the skin facing surface side in the absorbent core.
The absorbent article according to claim 4 or 5, wherein the protruding boundary groove is formed to have a basis weight lower than a basis weight of the first region and the second region of the absorbent core.
The absorptive core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and protrudes in a region excluding the protruding portion and the protruding boundary groove portion in the intermediate region. Has an adjacent part,
The projecting adjacent portion has a basis weight that is smaller than a basis weight of the projecting portion and equal to or less than a basis weight of the first region and the second region of the absorbent core. The absorbent article of Claim 1.
The absorbent article according to claim 7, wherein the protruding adjacent portion protrudes toward the non-skin side sheet from the top of the cavity in the protruding boundary groove portion, and the skin facing surface is formed flat. .
The protruding portion does not have a recess having a basis weight lower than the basis weight of the first region and the second region of the absorbent core on the skin facing surface side. Absorbent article as described in 1.
The absorbent core according to any one of claims 1 to 9, wherein the absorbent core has a continuous layer having a uniform thickness extending from the first region through the intermediate region to the second region on the skin facing surface. Absorbent article according to item.
The absorbent article according to any one of claims 1 to 10, wherein the entire absorbent core is formed by integral molding.
The protruding portion includes a protruding central portion formed by extending the predetermined width in the vertical direction according to both side edges along the vertical direction of the absorbent core, and a front side from the protruding central portion. A front-side convex portion and a rear-side convex portion bulged so that the length in the lateral direction is narrower than the maximum width portion toward the side and the rear side,
The front side convex portion is arranged at one front end portion in the vertical direction of the protruding central portion, and the rear side convex portion is arranged at one vertical end portion in the protruding central portion,
Each of the front-side convex portion and the rear-side convex portion is formed such that the lateral length gradually decreases from both side portions along the longitudinal direction toward the top portion located at the central portion in the lateral direction. The absorbent article according to any one of claims 1 to 11.
The projecting portion includes a projecting central portion formed so that the maximum width portion extends in a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
The projecting central portion is formed so that the thickness thereof decreases in a cross-sectional view from a lateral central portion toward both side portions along the vertical direction. Absorbent article.
The projecting portion includes a projecting central portion formed so that the maximum width portion extends in a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
The projecting central portion is formed so as to have a smaller basis weight from a lateral central portion to both side portions along the vertical direction in a cross-sectional view. Absorbent articles.
The absorptive core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and protrudes in a region excluding the protruding portion and the protruding boundary groove portion in the intermediate region. Has an adjacent part,
The absorbent article according to any one of claims 1 to 14, wherein the protruding adjacent portion has a basis weight smaller than a basis weight of the protruding portion and larger than a basis weight of the protruding boundary groove portion.
The absorbent article according to claim 15, wherein the protruding adjacent portion has a thickness that is the same as or smaller than the thickness of the first region and the second region of the absorbent core.
The absorbent article according to any one of claims 1 to 16, wherein a total length in the vertical direction of the protruding portion is 25% or more and 80% or less of a total length in the vertical direction of the absorbent core.
The projecting portion includes a projecting central portion formed so that the maximum width portion extends in a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
The absorbent article according to any one of claims 1 to 17, wherein a total length in the vertical direction of the projecting central portion in the projecting portion is 20% or more and 80% or less of a total length in the vertical direction of the projecting portion.
The absorbent core has a projecting boundary groove part that defines a boundary between the projecting part and the other part, and has a projecting adjacent part in the region excluding the projecting part and the projecting boundary groove part in the intermediate region,
The absorbent article has a pair of vertical pressing grooves extending in the longitudinal direction of the absorbent core as a linear groove in which the skin side sheet and the absorbent core are integrated by pressing.
The absorbent article according to any one of claims 1 to 18, wherein the vertical squeezing groove is formed to vertically cut the protruding portion, the protruding boundary groove portion, and the protruding adjacent portion.
The absorbent article has a lateral squeezing groove extending in a lateral direction inside the pair of vertical squeezing grooves as a linear groove in which the skin side sheet and the absorbent core are squeezed and integrated. The absorbent article as described.
21. The absorbent article according to claim 19 or 20, wherein the absorbent article has a pair of second vertical pressing grooves on an outer side in a lateral direction of the pair of vertical pressing grooves along the vertical direction of the intermediate region.
A groove portion extending in the lateral direction is disposed in the first region and the second region of the absorbent core, and the basis weight of the groove portion is absorbed from a portion other than the groove portion in the first region and the second region. The absorbent article according to any one of claims 1 to 21, wherein the basis weight of the forming material of the adhesive core is low.
Grooves extending in the longitudinal direction are disposed in the first region and the second region of the absorbent core, and the basis weight of the groove portions is absorbed by portions other than the groove portions in the first region and the second region. The absorbent article according to any one of claims 1 to 22, wherein the basis weight of the forming material of the adhesive core is low.
A pair of wing portions are provided on both lateral outer sides of the absorbent article, and the intermediate region exists between roots of the wing portions arranged at intervals in the vertical direction in each wing portion. 24. The absorbent article according to any one of 1 to 23.
25. The absorbent article according to claim 24, wherein the intermediate region of the absorbent core exists between the roots of the wing portion.
The absorbent article according to claim 24 or 25, wherein the length of the intermediate region of the absorbent core in the longitudinal direction is the same as the length between the roots of the wing portion.
The absorbent article according to any one of claims 1 to 26, further comprising leak-proof cuffs that can stand toward the wearer on both left and right sides along the front-rear direction of the absorbent article.
The absorbent article according to any one of claims 1 to 27, wherein the absorbent article is a sanitary napkin having a total length of 30 cm or more.