JP6221020B1 - Absorbent articles - Google Patents

Abstract

The absorbent article (1) includes an absorbent core (41). The absorptive core (41) has a middle-high part (42) in the excretion facing area (B). The middle and high portions (42) are thicker than the first region (41F) and the second region (41R) of the absorbent core (41). The middle-high portion (42) has a maximum width portion in which the length in the horizontal direction (Y) perpendicular to the longitudinal direction (X) of the absorbent core (41) is maximized in plan view, and the maximum width portion The length in the horizontal direction (Y) is the same as the maximum length in the horizontal direction (Y) in the intermediate region (41M) of the absorbent core (41).

Description

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

  Conventionally, in an absorbent article such as a sanitary napkin, when there is a large amount of liquid to be discharged, liquid leakage may occur in daily living activities. For this reason, the applicant of the present invention provides an absorbent core of the absorbent article in which a middle and high portion having a large basis weight is provided in an excretion-facing area disposed opposite to the liquid excretion portion of the wearer, or a lateral groove having a low basis weight in the middle and high portion. Proposed a method for preventing liquid leakage by diffusing the liquid without staying at the excretion point by providing (for example, Patent Documents 1 to 2).

  For example, Patent Document 1 proposes a technique that includes a surface structure having a middle-high portion that protrudes toward the skin side on a surface directed toward the skin side of the wearer, and a concave portion over the entire circumference of the middle-high portion. . According to the absorptive article given in patent documents 1, it is excellent in fit nature and absorptivity, and can prevent a liquid leak.

  Further, Patent Document 2 proposes an absorbent article including an absorbent core having a plurality of absorbent portions that are divided into block shapes by the groove portions, in which the middle and high regions and the groove portions are formed by integral molding. According to the absorbent article described in Patent Document 2, there is little discomfort due to the breakage of the absorbent core, and liquid return of the absorbed liquid is less likely to occur, thereby preventing liquid leakage.

JP-A-11-33054 JP 2014-104093 A

  The present invention relates to an absorbent article having an absorbent core having a shape elongated in the longitudinal direction corresponding to the wearer's longitudinal direction and having a front area and a rear area. The absorbent core has an intermediate region between a first region located on the front side and a second region located on the rear side, and the intermediate region includes the first region and the second region. It is provided with a middle-high portion having a greater thickness than the thickness in FIG. The middle-high 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. The length 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 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. 5A to FIG. 5B are explanatory views for explaining a manufacturing process of the absorbent core included in the sanitary napkin shown in FIG. Fig.6 (a) thru | or FIG.6 (f) is a top view by the side of the skin opposing surface in a part of absorptive core with which the sanitary napkin which is other preferable embodiment of the absorbent article of this invention is provided. 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. 9 is a plan view of the skin facing surface side of the absorbent core included in the napkin of Example 1. FIG. 10 (a) is a plan view of the skin facing surface side of the absorbent core of the napkin of Comparative Example 1, and FIG. 10 (b) is a plane of the skin facing surface side of the absorbent core of the napkin of Comparative Example 2. FIG. 10C is a plan view of the skin facing surface side of the absorbent core of the napkin of Comparative Example 3. FIG. 11 is a graph showing the results of measuring the rigidity values of the napkin of Example 1 and the napkins of Comparative Examples 1 to 3.

Detailed Description of the Invention

  In both the absorbent article described in Patent Document 1 and the absorbent article described in Patent Document 2, if the absorbent article cannot be worn at an appropriate position when worn, Wear position shift may occur in the width direction, and the effects of the absorbent article described in Patent Document 1 and the absorbent article described in Patent Document 2 may not be sufficiently obtained. As described above, the absorbent article described in Patent Document 1 and the absorbent article described in Patent Document 2 have room for further improvement.

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

  Hereinafter, an absorbent article of the present invention will be described with reference to the drawings based on a sanitary napkin 1 (hereinafter also referred to as “napkin 1”) which is a preferred embodiment thereof. The top view which looked at the napkin 1 of this embodiment from the skin side sheet | seat side is shown by FIG. As shown in FIG. 1, the napkin 1 of the present embodiment includes an absorbent core 41 having a shape that is long in the longitudinal direction X, and includes a front section A and a rear section 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 longitudinal direction X means “length” which is a distance measured in the longitudinal direction X, and the length in the lateral 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 a wing part, when the absorbent article is folded into the three-fold individual form, two folding lines (crossing the absorbent article in the lateral direction Y ( (Not shown) means a region surrounded by a first folding line and a second folding line as counted from the front end in the longitudinal direction X of the absorbent article.

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

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

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

  In the napkin 1, the pair of side sheets 5 and 5 are joined to the skin-side sheet 2 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. In addition, each line may be a continuous line or a broken line, and the linear pressing groove 7 of the napkin 1 is comprised from the row | line | column which many discontinuous point embosses make. 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 on the inner side of 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 middle-high portion 42. In the napkin 1, the intermediate area 41M is disposed in the excretion facing area B. More specifically, in the napkin 1, the intermediate region 41M of the absorbent core 41 and the excretion facing area B coincide with each other in the vertical direction. Therefore, the napkin 1 has the middle-high portion 42 in the intermediate region 41 </ b> M of the absorbent core 41. In the napkin 1, as shown in FIG. 2, the size of the front area A of the napkin 1 and the size of the first area 41F of the absorbent core 41 are substantially equal to each other in plan view. The size of C and the size of the second region 41R of the absorbent core 41 are substantially the same.

  When the napkin 1 is provided with a pair of wing portions 1W on both outer sides in the lateral direction Y, there is an intermediate region 41M between the roots of the wing portions 1W arranged at intervals in the vertical direction X in each wing portion 1W. doing. More specifically, the intermediate region 41M of the napkin 1 exists 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.

  Further, the intermediate region 41M is thicker than the thickness of the absorbent core 41 in each region of the first region 41F located in front of the intermediate region 41M and the second region 41R located behind the intermediate region 41M. . In the napkin 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 FIG. 4, the middle-high portion 42 is formed to be thicker than the first region 41 </ b> F and the second region 41 </ b> R in the absorbent core 41. Preferably, in the napkin 1, the middle-high portion 42 is formed to have a thickness larger than the thickness of the first region 41F in the absorbent core 41, and more than the basis weight of the first region 41F in the absorbent core 41. The amount is formed high. Further, preferably, in the napkin 1, the thickness of the middle-high portion 42 is formed to be thicker than the thickness of the second region 41 </ b> R in the absorbent core 41, and the second region 41 </ b> R in the absorbent core 41 is formed. The basis weight is higher than the basis weight. When the groove 45 is formed in the first region 41F and the second region 41R, the thickness and the basis weight of each of the first region 41F and the second region 41R to be compared with the thickness and the basis weight of the middle and high part 42, The thickness and basic weight in the part in which the groove part 45 mentioned later in the 1st area | region 41F and 2nd area | region 41R does not exist are meant. The absorbent core 41 of the napkin 1 has a thickness difference by providing a difference in the basis weight of the core material. Therefore, unlike the case of providing a thickness difference by compressing a part of the absorbent core having a uniform basis weight. The absorbent core 41 is flexible as a whole.

The thickness of the middle-high portion 42 is such that the middle-high portion 42 protrudes toward the skin and improves the absorbability of the liquid of the absorbent core 41 and the like in the first region 41F and the second region 41R in the absorbent core 41. The thickness is preferably 120% (that is, 1.2 times) or more, more preferably 140% or more, preferably 700% or less, more preferably 500% or less, and when worn. From the viewpoint of suppressing followability to the body and uncomfortable feeling, it is preferably 120% to 700%, more preferably 140% to 500%. Further, the difference in thickness between the thickness of the middle-high portion 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 it is 8.0 mm or less, More preferably, it is 6.0 mm or less, Preferably it is 1.0 mm or more and 8.0 mm or less, More preferably, it is 2.0 mm or more and 6.0 mm or less. The above-described configuration is particularly effective when the middle / high portion 42 is provided in the excretion facing area B like the napkin 1 of the present embodiment.
Further, the thickness of the middle-high portion 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 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, it is preferable that the relationship of the thickness is in the entire range of the middle-high portion 42. However, in the case where the increase / decrease is provided in the thickness direction of the middle-high portion 42, the relationship is the above in the thickest portion. It only has to be.
In addition, it is preferable that the relationship of the above thickness is in the entire range of the middle-high portion 42, but in the thickness direction of the middle-high portion 42, a gradual increase / decrease in thickness is provided in the lateral direction Y or the longitudinal 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 absorptive core 41 such as the middle-high portion 42, the first region 41F or the second region 41R, and the later-described middle-high adjacent portion 44 is measured by the following method.

<Method for measuring thickness of each part of absorbent core 41>
The absorbent core is left in a horizontal place so as not to be wrinkled or bent, and the middle / high 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 </ b> F or the second region 41 </ b> 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 middle high portion 42 in the absorbent core 41 is preferably from the viewpoint of causing the middle high portion 42 to protrude toward the skin and improving the absorbability of the liquid in the absorbent core in the excretion facing area B. 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, specifically preferably 100 g / m ² or more. It is 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 mass of the sample of 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. 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 middle-high portion 42 has a maximum width portion in which the length in the horizontal 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, as shown in FIG. 2, the middle-high portion 42 has a plan view of the absorbent core 41, and the maximum width portion of the middle-high portion 42 extends in the longitudinal direction X according to both side edges along the longitudinal direction X of the absorbent core 41. It has a middle-high central portion 421 formed to extend to a predetermined length. In other words, the middle-high center portion 421 extends in a band shape between both side edges 41s, 41s along the longitudinal direction X of the absorbent core 41, and extends over the entire length of the belt-shaped middle-high center portion 421 in the longitudinal direction X. And has the maximum width portion of the middle-high portion 42. The length in the lateral direction Y of the maximum width portion of the middle-high central portion 421 is the same as the width of the absorbent core 41. Here, the width of the absorbent core 41 means the width of the absorbent core 41 including the middle and high portions 42. That is, when the middle-high portion 42 is viewed in a cross-section in the lateral direction Y, the middle-high position located on the skin contact surface side rather than the height position of the surface on the skin contact surface side of the adjacent first region 41F and second region 41R. If the width of the part 42 (skin side width) is the same as or larger than the width of the middle high part 42 (non-skin side width) located on the non-skin contact surface side, the maximum width of the middle high part 42 is the width of the absorbent core 41. Is the same. However, it is desirable that the maximum width portion of the middle-high 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 absorbent core 41, it is preferable to make the area of the middle and high central portion 421 as wide as possible so that sufficient absorbent performance can be exhibited even if the absorbent article is worn with the absorbent article slightly shifted. From such a viewpoint, it is preferable that the middle and high 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. 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 middle-high portion 42 is caused by a positional deviation in the lateral direction Y of the middle-high portion 42 in the absorbent core 41, chipping of the middle-high portion 42, die-cutting inclination due to the production method, rounding of the end portion, chamfering, 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 FIG. 2, the length in the lateral direction Y at the maximum width portion in the lateral direction Y of the middle-high portion 42 is the same as the maximum length in the lateral direction Y in the intermediate region 41 </ b> M of the absorbent core 41. This is the same as the maximum length of the core 41 in the lateral direction Y.

  In the napkin 1, the middle-high center portion 421 has a height that decreases from the center portion in the lateral direction Y toward both side edges along the longitudinal direction X as shown in FIG. 3. It is formed as follows. That is, the center portion arranged on the center line CL extending in the vertical direction X in the middle-high center portion 421 is formed with the highest height. Thus, when the middle-high center part 421 is formed, the absorptivity etc. of the liquid in the excretion opposite area B can be improved.

  In the napkin 1, the middle-high center portion 421 has a smaller basis weight from the center portion in the lateral direction Y toward the side edge portions in the longitudinal 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 middle-high center portion 421 is formed with the largest basis weight. Thus, when the middle-high center part 421 is formed, the absorptivity etc. of the liquid in the excretion opposite area B can be improved.

The middle-high center portion 421 of the napkin 1 is a height at the side edge 41s having the smallest height of the height (T1) of the center portion arranged 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 of allowing the middle and high parts to adhere to the excretion part without gaps as much as possible. 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.
Moreover, the middle-high part 42 becomes a form which does not have a recessed part with a basis weight lower than the basis weight of the 1st area | region 41F and the 2nd area | region 41R in the absorptive core 41 in the skin contact surface side. 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 concave portion having a low basis weight is present on the skin contact surface side of the middle and high portions 42, unexpected wrinkles and folds are likely to occur in the napkin 1. If the low basis weight concave portion is a vertical groove portion that vertically cuts the middle high portion 42 in the vertical direction X on the skin contact surface of the middle high portion 42, the middle high portion 42 is divided in the width direction by the vertical groove. It is easy to become wrinkled along the vertical direction on the napkin 1 starting from the longitudinal groove when worn, and the absorbent core may be divided by the movement of the wearer of the napkin 1 based on the longitudinal groove. It is assumed that this can happen. 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.

  Further, the middle-high portion 42 has a front-side convex portion 422 whose length in the lateral direction Y is narrower than the maximum width portion of the middle-high portion 42 from the middle-high central portion 421 toward the front section A side or the rear section C side. Or the rear side convex part 423 is provided. In other words, the middle-high portion 42 is a front-side convex portion that is convex from the front end portion in the longitudinal direction X of the middle-high center 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 the rear-side convex portions 423 convex toward the second region 41R side from the rear end portion in the longitudinal direction X of the middle-high center portion 421. In the napkin 1, the middle-high portion 42 is The front side convex portion 422 and the rear side convex portion 423 are provided. That is, in the napkin 1, the middle / high portion 42 is divided into a front convex portion 422, a middle / high 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 middle / high center portion 421, and the rear convex portion 423 is the rear end portion of the middle / high center 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 portion 422 of the front convex portion 422 and the rear convex portion 423 as an example. Both side sides 422s and 422s extend straight without bending. ing. 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.

The total length L2 of the middle and high portions 42 in the longitudinal direction X is preferably 25% or more, more preferably 30% or more, and preferably 90% or less, more preferably, of the total length L1 of the absorbent core 41 in the longitudinal direction X. Is 75% or less, preferably 25% or more and 90% 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 middle-high part 42.

  The overall length L3 in the longitudinal direction X of the middle-high central portion 421 constituting the middle-high portion 42 is preferably 20% or more, more preferably 30% or more, and preferably 80% or less, more than the total length L2 of the middle-high portion 42. Preferably it is 70% or less, preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less.

The total length L4 in the longitudinal direction X of the front convex portion 422 constituting the middle-high portion 42 is preferably 5% or more, more preferably 10% or more, and preferably 50% or less of the total length L2 of the middle-high portion 42. More preferably, it is 30% or less, 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-side convex portion 423 constituting the middle-high portion 42 is the same as the total length L4 in the vertical direction X of the front-side 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 FIG. 2, the absorptive core 41 has the middle-high boundary groove part 43 which divides the boundary between the middle-high part 42 and a part other than the middle-high part 42 in the intermediate region 41M. In the napkin 1, the middle / high boundary groove portion 43 forms a front middle / high boundary groove portion 43 a extending along both side sides 422 s and 422 s forming the front convex portion 422 constituting the middle high portion 42 and a rear convex portion 423. It has a rear middle / high boundary groove 43c extending along both sides 423s and 423s. The front middle / high boundary groove 43a and the rear middle / high 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 acting on the inner side in the width direction of the absorbent core 41 from the legs, and the napkin 1 is easy to fit three-dimensionally along the shape of the body. Become. Thus, in the absorptive core 41, the boundary with the middle-high part 42 is divided by the front middle-high boundary groove part 43a and the back middle-high boundary groove part 43c.

In the napkin 1, the groove width of the middle / high 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 of the middle / high boundary groove portion 43 and the thickness described later are measured in a direction perpendicular to the extending direction of the middle / high boundary groove portion 43 and measured from a photograph of the cut end surface.
In the napkin 1, the thickness of the middle / high boundary groove 43 in the absorbent core 41 is preferably 0.08 mm or more, more preferably 0.15 mm or more, from the viewpoint of improving the liquid absorbency and the like in the excretion facing area B. Also, it is preferably 7.0 mm or less, more preferably 3.5 mm or less, and preferably 0.08 mm or more and 7.0 mm or less, more preferably 0.15 mm or more and 3.5 mm or less. is there

In the napkin 1, the middle / high boundary groove portion 43 is formed to have a basis weight lower than the basis weight of the middle / high portion 42 and further lower than the basis weight of the first region 41F and the second region 41R in the absorbent core 41. ing. Here, the basis weight of the first region 41 </ b> F and the basis weight of the second region 41 </ b> R mean the basis weight of the portion excluding the groove portion 45 when having the groove portion 45. The basis weight of the middle / high 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 middle-high boundary groove part 43 is the skin facing surface side of the sample of the part of the middle-high 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, as shown in FIG. 2, the absorbent core 41 has a middle-high adjacent portion 44 in a region excluding the middle-high portion 42 in the intermediate region 41M and a region excluding the middle-high boundary groove 43. That is, in the napkin 1, the intermediate region 41 </ b> M in the absorbent core 41 includes the middle / high portion 42, the middle / high boundary groove portion 43, and the middle / high adjacent portion 44. The middle-high adjacent portion 44 includes a front middle-high adjacent portion 44a disposed on the first region 41F side adjacent to the front-side convex portion 422 constituting the middle-high portion 42 and a rear-side convex constituting the middle-high portion 42 in the intermediate region 41M. And a rear middle / higher adjacent portion 44c disposed on the second region 41R side adjacent to the portion 423. The front middle-high adjacent portion 44a is formed symmetrically with respect to the center line CL extending in the vertical direction X. In the front middle / higher adjacent portion 44a, the half portion on the side edge 41s side along the longitudinal direction X of the absorbent core 41 than 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 rear middle high adjacent portion 44c is also formed symmetrically with respect to the center line CL extending in the vertical direction X, similarly to the front middle high adjacent portion 44a. The half of the side edge 41s side along the longitudinal direction X of the absorbent core 41 with respect to the center line CL in the rear middle-high adjacent portion 44c 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 FIG. 4, the middle-high adjacent portion 44 is formed so that the thickness is larger than the thickness of the middle-high boundary groove portion 43 and smaller than the thickness of the middle-high portion 42 in the absorbent core 41. . Furthermore, from the viewpoint of followability to the movement of the body, it is preferable that the middle-high adjacent portion 44 has the same thickness as the thickness of the first region 41F and the thickness of the second region 41R. In addition, from the viewpoint of the strength of the absorbent core 41 when it is repeatedly deformed with respect to body movement, the middle-high adjacent portion 44 has a thickness larger than the thickness of the first region 41F and the thickness of the second region 41R. May be.
The thickness of the middle-high 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 middle-high 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 middle and high adjacent portions 44 are formed so that the basis weight is smaller than the basis weight of the middle and high portions 42 of the absorbent core 41 and larger than the basis weight of the middle and high boundary groove portions 43. Furthermore, from the viewpoint of following the movement of the body, the middle-high adjacent portion 44 has a basis weight equal to or smaller than the basis weight of the first region 41F and the second region 41R in the absorbent core 41. It is preferable that In addition, from the viewpoint of the strength of the absorbent core 41 when it is repeatedly deformed with respect to body movement, the middle-high 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 </ b> F and the basis weight of the second region 41 </ b> R mean the basis weight of the portion excluding the groove portion 45 when having the groove portion 45. The basis weight of the middle-high 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 middle-high adjacent part 44 is the surface on the skin facing surface side of the sample of the middle-high adjacent part 44 cut out as described in the measuring method of 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. 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.

  In the napkin 1, the absorbent core 41 having the groove portion 45 and the small absorption portion 46 in the first region 41F and the second region 41R, and having the middle-high portion 42, the middle-high boundary groove portion 43, and the middle-high 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. 5A, 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. 5A, one concave portion 56 b for forming the intermediate region 41 </ b> M of the absorbent core 41 is formed in a part of the bottom surface 56 of the single concave portion 55 for accumulation. . In addition, a first air-impermeable member 57 for forming a middle-high boundary groove 43 that separates the middle-high portion 42 and the middle-high adjacent portion 44 is disposed on the bottom surface of the recess 56b. The first breathable member 57 is arranged at a position corresponding to the middle / high 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.

  Similarly to the known fiber pile device provided with the fiber pile drum, the core material mixed with the water-absorbing polymer and the pulp fiber is supplied into the duct while sucking from the bottom surface of the accumulation concave portion 55, so that 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 middle-high part 42 in which both basic weight and thickness are relatively large. Similarly, the portion made of the core material deposited in the upstream region and the downstream region adjacent to the recess 56b becomes the first region 41F and the second region 41R in the absorbent core 41 having a relatively small basis weight. Further, the portion made of the core material deposited on the first non-breathable member 57 of the recess 56b becomes the middle / high boundary groove 43 that is relatively smaller than the basis weight of the first region 41F and the basis weight of the second region 41R. . The portion made of the core material deposited on the second non-breathable member 58 in the upstream region and the downstream region adjacent to the recess 56 b becomes the groove portion 45 that is relatively smaller than the basis weight of the small absorbent portion 46.

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 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. Moreover, it is preferable that the fiber material is 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) that covers 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.
1-2, the napkin 1 has the middle-high part 42 in the intermediate region 41M in the absorbent core 41, and the middle-high part 42 is a plan view of the absorbent core 41 as shown in FIG. Thus, the absorbent core 41 has a maximum width portion in which the length in the lateral direction Y is the maximum, and the length of the maximum width portion in the lateral direction Y is the transverse direction Y of the intermediate region 41M of the absorbent core 41. It is the same as the length. Therefore, even if the napkin 1 which is an absorbent article is worn in a slightly shifted state, it is difficult to give the wearer a sense of incongruity due to excellent conformability to the body shape, and a gap is formed between the skin of the wearer It is difficult and sufficient absorption performance can be expressed. In particular, in the napkin 1, the maximum width portion has a middle-high 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. Moreover, the middle-high part 42 is a front-side convex part that is convex toward the first region 41F side from the front end part in the longitudinal direction X of the middle-high center part 421 in plan view as shown in FIG. 422 and the rear side convex part 423 which protrudes toward the 2nd area | region 41R side from the rear-end part of the vertical direction X of the middle-high center part 421 are provided. Therefore, even if the napkin 1 is worn in a slightly shifted state, if the middle-high part 42 has either the front convex part 422 or the rear convex part 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 middle-high portion 42 has excellent followability to the body shape, and it is difficult for the wearer to feel uncomfortable. . Moreover, even if the napkin 1 is worn in a slightly displaced state, if the middle-high portion 42 has either one of the front-side convex portion 422 and the rear-side convex portion 423, there is a gap between the wearer's skin. And sufficient absorption performance can be expressed. Thus, the fit with the body can be maintained while the napkin 1 is worn, and liquid leakage is unlikely to occur. In the napkin 1, since the middle-high part 42 has both the front side convex part 422 and the back side convex part 423, the said effect can be produced 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.

  In addition, as shown in FIG. 2, the napkin 1 has a middle-high portion 42 and a middle-high boundary groove portion 43 that defines a portion other than the middle-high portion 42 in the intermediate region 41 </ b> M of the absorbent core 41. The middle / high boundary groove portion 43 is formed to have a basis weight lower than the basis weight of the middle / high portion 42 and further lower than the basis weight of the first region 41 </ b> F and the second region 41 </ b> R in the absorbent core 41. Therefore, it is easy to bend | fold from the middle-high boundary groove part 43, and it is hard to give a wearer an uncomfortable feeling. Furthermore, since the middle / high boundary groove 43 is formed over the entire length in the lateral direction Y of the absorbent core 41, the width-direction side edge of the absorbent core 41 also matches the body shape and movement of the wearer. This makes it easier to bend and further improve fit.

  Further, as shown in FIG. 2, the napkin 1 has a front middle-high adjacent portion disposed on the first region 41 </ b> F side adjacent to the front convex portion 422 constituting the middle-high portion 42 in the intermediate region 41 </ b> M of the absorbent core 41. 44a and a rear middle-high adjacent portion 44c disposed on the second region 41R side adjacent to the rear-side convex portion 423 constituting the middle-high portion 42. The middle and high adjacent portions 44 have a thickness that is equal to or smaller than the thickness of the first region 41F and the second region 41R in the absorbent core 41 and is smaller than the thickness of the middle and high portions 42. Therefore, even if the napkin 1 is worn in a slightly shifted state, it is difficult to form a gap with the wearer's skin, and sufficient absorption performance can be exhibited. In the napkin 1, the basis weight of the middle-high 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 middle-high boundary groove 43. Therefore, the effect which reduces the discomfort to a wearer among the said effects can be show | played further.

In particular, when the napkin 1 is worn over a long period of time, when the napkin 1 is repeatedly deformed by the movement of the body, there is a possibility that the middle-high adjacent portion 44 may be damaged to impair the absorption performance. The thickness of the portion 44 may be larger than the thickness of the first region 41F and the second region 41R in the absorbent core 41.
Furthermore, when the middle-high adjacent portion 44 is damaged due to repeated deformation due to body movement and the absorption performance is impaired, the basis weight of the middle-high adjacent portion 44 is the first region 41F and the second region of the absorbent core 41. It may be larger than the basis weight of the region 41R.

  Moreover, since the napkin 1 has the groove part 45 and the small absorption part 46 in the 1st area | region 41F and the 2nd area | region 41R in the absorptive core 41 as shown in FIG. 2, it bend | folds from the groove part 45 as the starting point. It is easy and it is difficult to 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 front side convex part 422 in the absorbent core 41 of the napkin 1, as shown in FIG. 2, the side edges 422s and 422s are not bent, and the side edges 41s along the longitudinal direction X of the absorbent core 41 are not bent. 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. Hereinafter, as an example in which the width d of the front-side convex portion 422 is gradually reduced, an example shown in FIGS. 6A to 6E will be described. The same applies to the rear convex portion 423.

  The front convex portion 422 of the absorbent core 41 shown in FIG. 6A is formed in a curve having a constant curvature radius from the side edge 41s along the longitudinal direction X of the absorbent core 41 toward the top portion 422t. Yes. Thus, since the convex shape is drawn toward the top part 422t, the width d of the front side convex part 422 gradually decreases.

  Next, as for the front side convex part 422 of the absorptive core 41 shown in FIG.6 (b), the side 422s bent on the way from the side edge 41s along the vertical direction X of the absorptive core 41 to the top part 422t. It is formed with a straight line. Thus, since the convex shape is drawn toward the top part 422t, the width d of the front side convex part 422 gradually decreases.

  Next, the front-side convex portion 422 of the absorbent core 41 shown in FIG. 6C has a plurality of curves with different curvature radii from the side edge 41s along the longitudinal direction X of the absorbent core 41 toward the top portion 422t. It is drawn and formed. Thus, since the convex shape is drawn toward the top portion 422t, the width d of the front side convex portion 422 gradually decreases.

  Next, as for the front side convex part 422 of the absorptive core 41 shown in FIG.6 (d), the side edge 422s is straight to the middle from the side edge 41s along the vertical direction X of the absorptive core 41 to the top part 422t. It is formed by drawing a curve with a constant radius of curvature from the middle. Thus, since the convex shape is drawn toward the top part 422t, the width d of the front side convex part 422 gradually decreases.

  Next, the front convex portion 422 of the absorbent core 41 shown in FIG. 6 (e) is absorbed from the side edge 41 s along the longitudinal direction X of the absorbent core 41 toward the top portion 422 t as shown in FIG. 6 (d). Contrary to the front convex part 422 of the elastic core 41, the side 422s is formed halfway along a curved line having a constant radius of curvature, and is formed from the middle with a straight line. Thus, since the convex shape is drawn toward the top part 422t, the width d of the front side convex part 422 gradually decreases.

  Further, as shown in FIG. 2, only one front-side convex portion 422 of the napkin 1 is arranged at the front end portion of the middle-high center portion 421. However, as shown in FIG. A plurality of the front end portions may be arranged.

  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 they are smaller than the thickness of the middle-high 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 middle-high 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 absorbent 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 disposed at The part 42 may be formed.

  Moreover, the absorptive core 41 of the napkin 1 may be provided with the continuous layer which is not divided over the whole surface direction.

  Further, as shown in FIG. 1, the napkin 1 is provided with side sheets 5 on both sides along the longitudinal direction X of the skin facing surface of the skin side sheet 2, but at the free end of the side sheet 5, A leak-proof cuff may be formed by arranging an elastic member extending in the longitudinal direction X.

  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. The vertical squeezing groove 73 is formed so as to longitudinally cut the middle / high part 42, the middle / high boundary groove part 43, and the middle / high adjacent part 44 in the absorbent core 41 in the longitudinal direction X from the viewpoint of preventing further leakage. . However, like the napkin 1 shown in FIG. 7, at the front and rear ends 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, you may provide a pair of vertical pressing groove 73A, 73A in the outer side of the width direction Y of a pair of vertical pressing groove 73, 73 in alignment with the vertical direction X of the excretion opposing area B like the napkin 1 shown in FIG. . By providing the vertical squeezing 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. The vertical pressing grooves 73A and 73A are more preferably arranged at the position of the intermediate region 41M in the vertical direction X from the viewpoint of twist prevention and fit.

  Moreover, the absorptive core 41 of the napkin 1 may form the groove part 45 in the non-skin opposing surface side. Thereby, liquid diffusibility and liquid retention are improved.

  Further, in the napkin 1, the size of the front area A of the napkin 1 and the size of the first region 41F of the absorbent core 41 are substantially the same, but may not be the same. 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.

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

  The following absorbent article is disclosed further regarding embodiment of this invention mentioned above.

<1>
An absorbent article having a longitudinally long absorbent core corresponding to the longitudinal direction of the wearer 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. Equipped with a thick middle and high part than the thickness in the two areas,
The middle-high 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>
<1> The middle-high portion includes a middle-high center 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. Absorbent article as described in 1.

<3>
The middle-high portion includes a front-side convex portion or a rear-side convex portion whose lateral length is narrower than the maximum width portion from the middle-high central portion toward the front side or the rear side, Absorbent article according to 2>.
<4>
The middle-high part is the absorbent article according to <3>, wherein the front side convex part and the rear side convex part are included.
<5>
The front side convex portion is arranged at one front end portion in the vertical direction of the middle and high central portion, and the rear side convex portion is arranged at one rear end portion in the vertical direction of the middle and high 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 as described in said <4>.
<6>
<1> to <5>, wherein the middle-high 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 contact surface side. The absorbent article of any one.
<7>
The middle-high portion is any one of <1> to <6>, wherein the basis weight of the first region and the basis weight of the second region in the absorbent core are higher than the basis weight. Absorbent article.
<8>
The absorbent core has a middle-high boundary groove portion that defines a boundary between the middle-high portion and a portion other than the middle-high portion in the intermediate region,
The absorbent article according to any one of <1> to <7>, wherein the middle / high boundary groove is formed over the entire length in the lateral direction of the absorbent core.
<9>
The absorbent article according to <8>, wherein the middle / high 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.
<10>
The middle-high portion includes a middle-high central portion formed so that the maximum width portion extends to 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 <9>, wherein the middle-high center portion is formed so that its height decreases from the center portion in the lateral direction toward both side portions along the longitudinal direction in a cross-sectional view. Absorbent article as described in 1.
<11>
The middle-high portion includes a middle-high central portion formed so that the maximum width portion extends to 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-mentioned <1> to <9>, wherein the middle-high central portion is formed so that the basis weight thereof decreases in the cross-sectional view from the lateral central portion toward both side portions along the vertical direction. Absorbent article as described in 1.
<12>
The absorbent core has a middle-high boundary groove portion that defines a boundary between the middle-high portion and a portion other than the middle-high portion in the middle region, and a middle-high boundary region in the middle region excluding the middle-high portion and the middle-high boundary groove portion. Has an adjacent part,
The absorptivity according to any one of <1> to <11>, wherein the basis weight of the middle-high adjacent portion is smaller than the basis weight of the middle-high portion and larger than the basis weight of the middle-high boundary groove portion. Goods.
<13>
The middle-high adjacent portion is the absorbent article according to <12>, wherein the basis weight is the same as or smaller than the basis weight of the first region and the second region in the absorbent core.
<14>
The absorbent core has a middle-high boundary groove portion that defines a boundary between the middle-high portion and a portion other than the middle-high portion in the middle region, and a middle-high boundary region in the middle region excluding the middle-high portion and the middle-high boundary groove portion. Has an adjacent part,
The absorbent article according to any one of <1> to <13>, wherein the middle-high adjacent portion has a thickness larger than a thickness of the middle-high boundary groove and smaller than a thickness of the middle-high boundary groove.
<15>
The middle-high adjacent portion is the absorbent article according to <14>, wherein the thickness is the same as or smaller than the thickness of the first region and the second region in the absorbent core.
<16>
The absorbent article according to any one of <1> to <15>, wherein the absorbent core includes a continuous layer that is not divided over the entire surface direction.
<17>
The absorbent article according to any one of <1> to <16>, wherein a total length of the middle and high portions in a vertical direction is 25% or more and 80% or less of a total length in the vertical direction of the absorbent core.
<18>
The absorptivity according to any one of the above items <2> to <5>, wherein a total length in the middle direction of the middle and high portions is 20% or more and 80% or less of a total length of the middle and high portions in the vertical direction. Goods.
<19>
The absorbent article comprises a skin-side sheet that forms a skin-facing surface, a non-skin-side sheet that forms a non-skin-facing surface, and the absorbent core interposed between both sheets,
The absorbent core has a medium-high boundary groove part that defines a boundary between the medium-high part and the other part, and has a medium-high adjacent part in a region excluding the medium-high part and the medium-high 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 so as to longitudinally cut the middle-high part, the middle-high boundary groove part, and the middle-high adjacent part. .
<20>
The absorbent article according to <19>, further including a lateral pressing groove extending in a lateral direction inside the pair of vertical pressing grooves.
<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 width direction of the pair of vertical pressing grooves along the vertical direction of the intermediate region. Goods.
<22>
Grooves extending in the lateral direction are disposed in the first region and the second region of the absorbent core, and the basis weight of the grooves is absorbed from portions other than the groove portions in the first region and the second region. The absorbent article according to any one of <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 according to any one of <1> to <23>, wherein the absorbent core is configured by integral molding.
<25>
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 <24>.
<26>
The absorbent article <27> according to any one of <1> to <25>, wherein the intermediate region of the absorbent article exists between the roots of the wing portion.
The absorbent article according to any one of <1> to <26>, wherein the length of the intermediate region in the longitudinal direction of the absorbent article is the same as the length between the roots of the wing portion.
<28>
The absorbent article according to any one of <1> to <27>, wherein the absorbent article has a rear flap portion at a lateral rear portion of the second region.
<29>
The absorbent article according to any one of <1> to <28>, further comprising a three-dimensional guard that can stand toward the wearer on both left and right sides along the front-rear direction of the absorbent article.
<30>
The absorbent article according to any one of <1> to <29>, wherein the absorbent article is a sanitary napkin having a total length of 30 cm or more.

  EXAMPLES Hereinafter, although this invention is further demonstrated using an Example, this invention is not restrict | limited at all by such an Example.

[Example 1]
An absorbent core having the form shown in FIG. 9 was produced. The absorbent core 41 was formed as a mixed fiber of pulp fibers and water-absorbing polymer. The absorbent core 41 has a middle-high portion 42 in the intermediate region 41M, and the middle-high portion 42 has a front-side convex portion at each of a middle-high center portion 421 covering the entire width of the absorbent core 41 and front and rear end portions of the middle-high center portion 421. 422 and a rear-side convex portion 423. The thickness of the middle-high portion 42 was 3.5 mm, and the thickness of the first region 41F and the thickness of the second region 41R were 2.3 mm. The basis weight of the middle-high portion 42 was 350 g / m ² , and the basis weight of the first region 41F and the basis weight of the second region 41R were 250 g / m ² . Thickness and basic weight were measured by the method mentioned above. Further, the overall length L2 in the longitudinal direction X of the middle-high portion 42 was 63% of the overall length L1 in the longitudinal direction X of the absorbent core 41.
Next, the absorbent core having the form shown in FIG. 9 was covered with tissue paper to form an absorbent body, and sandwiched between the skin side sheet and the non-skin side sheet to obtain the napkin of Example 1. The absorbent body and the skin side sheet, and the absorbent body and the non-skin side sheet were joined via an adhesive.
The following were used as the skin side sheet and the outer layer sheet.

Skin-side sheet: Air-through nonwoven fabric with basis weight of 30 g / m ² Non-skin-side sheet: Non-breathable polyethylene film sheet with basis weight of 25 g / m ²

[Comparative Example 1]
A napkin of Comparative Example 1 was produced in the same manner as the napkin of Example 1 except that a sanitary napkin was produced using the absorbent core 41 ′ having the form shown in FIG. In the absorbent core 41 ′ shown in FIG. 10A, the mid-high portion 42 ′ does not have the front convex portion 422 and the rear convex portion 423 compared to the absorbent core shown in FIG. 9. The only difference is that it has only the middle and high central part 421 '. The thickness and basis weight of the middle-high portion 42 ′ were the same as those of the napkin of Example 1, and the thickness and basis weight of the first region 41F ′ and the second region 41R ′ were the same as those of the napkin of Example 1. Further, the overall length in the longitudinal direction X of the middle-high portion 42 ′ was 63% of the overall length in the longitudinal direction X of the absorbent core 41 ′.

[Comparative Example 2]
A napkin of Comparative Example 2 was produced in the same manner as the napkin of Example 1 except that a sanitary napkin was produced using the absorbent core 41 ′ having the form shown in FIG. The absorbent core 41 ′ shown in FIG. 10 (b) has a middle / high part 421 </ b> X in which the middle / high part 42 ′ does not extend over the entire width of the absorbent core 41 compared to the absorbent core shown in FIG. 9. Is different. The thickness and basis weight of the middle-high portion 42 ′ were the same as those of the napkin of Example 1, and the thickness and basis weight of the first region 41F ′ and the second region 41R ′ were the same as those of the napkin of Example 1. Further, the overall length in the longitudinal direction X of the middle-high portion 42 ′ was 63% of the overall length in the longitudinal direction X of the absorbent core 41 ′.

[Comparative Example 3]
A napkin of Comparative Example 3 was produced in the same manner as the napkin of Example 1 except that a sanitary napkin was produced using the absorbent core 41 ′ having the form shown in FIG. The absorbent core 41 ′ shown in FIG. 10 (c) has a middle / high portion 421 X that does not cover the entire width of the absorbent core 41 compared to the absorbent core shown in FIG. 9. Is different. Further, the middle / high part 421X was formed in a cross shape. The thickness and basis weight of the middle-high portion 42 ′ were the same as those of the napkin of Example 1, and the thickness and basis weight of the first region 41F ′ and the second region 41R ′ were the same as those of the napkin of Example 1. Further, the overall length in the longitudinal direction X of the middle-high portion 42 ′ was 63% of the overall length in the longitudinal direction X of the absorbent core 41 ′.

[Evaluation]
The rigidity of the napkin of Example 1 and the napkins of Comparative Examples 1 to 3 was evaluated by the following method.
First, the prepared napkin of Example 1 and the napkins of Comparative Examples 1 to 3 were stored in a test room at a temperature of 23 ° C. and a humidity of 50% for 24 hours. Thereafter, a measurement sample was used, and the rigidity value was measured in accordance with the handle ohm method (JIS L-1096) under the same environmental conditions. As a handle ohmmeter, model: HOM-200 manufactured by Daiei Scientific Instruments Co., Ltd. was used. The measurement sample was placed on the sample stage so that the non-skin side sheet side was directed downward and the vertical direction thereof was perpendicular to the slot having a width of 10 m. Next, the blade of the penetrator is lowered at a constant speed of 200 mm / min at a constant speed of 200 mm / min from a position 10 mm away from the front end side of the front section side of the middle high section toward the middle section, and a depth of 8 mm. The maximum value indicated by the indicator (load meter) when pushing in was read. About the napkin of Example 1 and the napkin of Comparative Examples 1-3, it measured five each and the thing which calculated | required the average value of the measurement result is shown in FIG.

  As is clear from the results shown in FIG. 11, the napkin of Example 1 has a smooth increase in rigidity value in the region near the front end on the front section side of the middle and high parts, compared to the napkins of Comparative Examples 1 to 3. I understood it. Thus, it was found that the napkin of Example 1 was not easily formed with a refracting part and deformed flexibly because there was no portion where the rigidity increased rapidly. If such a napkin of Example 1 is used, it is difficult to give the wearer a sense of incongruity by being excellent in conformity to the body shape even when worn in a slightly displaced state, and there is a gap between the skin of the wearer It can be expected that sufficient absorption performance can be exhibited.

  According to the present invention, even if the absorbent article is worn in a slightly displaced state, it is difficult to give the wearer a sense of incongruity by being excellent in conformity to the body shape, and it is difficult to create a gap between the skin of the wearer. Sufficient absorption performance can be expressed.

Claims (13)

An absorbent article having a longitudinally long absorbent core corresponding to the longitudinal direction of the wearer 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. Equipped with a thick middle and high part than the thickness in the two areas,
The middle-high 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 length of the absorbent core is the same as the lateral length of the absorbent core,
The middle-high portion includes a middle-high central portion formed so that the maximum width portion extends to a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
The middle-high portion is a front-side convex portion whose lateral length is narrower than the maximum-width portion from the middle-high center portion toward the front side or the maximum-width portion from the middle-high center portion toward the rear side. It has a rear-side convex part that is narrower in the lateral direction than
The absorbent core has a middle-high boundary groove portion that defines a boundary between the middle-high portion and a portion other than the middle-high portion in the intermediate region,
The middle / high boundary groove portion extends along both sides forming the front convex portion or extends along both sides forming the rear convex portion, and the lateral total length of the absorbent core An absorbent article formed over the entire area.   The absorptive article according to claim 1 in which said middle high part has said front side convex part and said back side convex part. The front side convex portion is arranged at one front end portion in the vertical direction of the middle and high central portion, and the rear side convex portion is arranged at one rear end portion in the vertical direction of the middle and high 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 claim 2.   The middle-high portion does not have a recess whose basis weight is lower than the basis weight of the first region and the second region of the absorbent core on the skin contact surface side. Absorbent article according to item.   The absorptivity according to any one of claims 1 to 4, wherein the middle and high portions are formed so that a basis weight is higher than a basis weight of the first region and a basis weight of the second region in the absorbent core. Goods. The absorbent core has a middle-high boundary groove portion that defines a boundary between the middle-high portion and a portion other than the middle-high portion in the intermediate region,
The absorbent article according to any one of claims 1 to 5, wherein the middle / high boundary groove is formed over the entire length in the lateral direction of the absorbent core.   The absorbent article according to any one of claims 1 to 6, wherein the middle and high boundary groove portions are formed such that a basis weight is lower than a basis weight of the first region and the second region in the absorbent core. The middle-high portion includes a middle-high central portion formed so that the maximum width portion extends to a predetermined length in the longitudinal direction according to both side edges along the longitudinal direction of the absorbent core,
The middle-high center portion is formed so that its basis weight decreases from a center portion in a horizontal direction toward both side portions along a vertical direction in a cross-sectional view. Absorbent articles.   The absorbent article according to any one of claims 1 to 8, wherein the absorbent core includes a continuous layer that is not divided over the entire surface direction. The absorbent article comprises a skin-side sheet that forms a skin-facing surface, a non-skin-side sheet that forms a non-skin-facing surface, and the absorbent core interposed between both sheets,
The absorbent core has a medium-high boundary groove part that defines a boundary between the medium-high part and the other part, and has a medium-high adjacent part in a region excluding the medium-high part and the medium-high 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 absorptive article according to any one of claims 1 to 9 in which said vertical pressing groove is formed so that said middle and high part, said middle and high boundary groove part, and said middle and high adjacent part may be cut in the lengthwise direction.   Grooves extending in the lateral direction are disposed in the first region and the second region of the absorbent core, and the basis weight of the grooves is absorbed from portions other than the groove portions in the first region and the second region. The absorptive article given in any 1 paragraph of Claims 1-10 whose basic weight of the formation material of a property 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 absorptive article given in any 1 paragraph of Claims 1-11 whose basic weight of the formation material of a property core is low.   The absorbent article according to any one of claims 1 to 12, wherein the absorbent core is formed by integral molding.

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