JP6467391B2 - Absorbent articles - Google Patents

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. Therefore, in the absorbent core of the absorbent article, the present applicant has a method for preventing liquid leakage by providing a middle and high portion having a large basis weight in the central portion of the excretion facing area that is disposed opposite to the liquid excretion portion of the wearer. Proposed (for example, Patent Document 1).

  For example, in Patent Document 1, in the absorbent core of the absorbent article, a central portion of the excretion part having a large basis weight is provided in the central part of the excretion counter area, and the excretion part middle and high region has a central wall having a long axis in the longitudinal direction. The technique which has a part and a side thick part which bulges outward from each side edge along the longitudinal direction of a center thick part was proposed. According to the absorbent article described in Patent Document 1, it is possible to improve the wearing feeling and prevent liquid leakage. Moreover, even if the mounting position is slightly shifted, the absorption performance can be expressed.

Japanese Patent Laying-Open No. 2015-97716

  However, in the absorbent article described in Patent Document 1, if the absorbent article cannot be worn at an appropriate position on the body when worn, a wearing position shift occurs in the front-rear direction and the left-right width direction of the body. In some cases, the effect of the absorbent article described in Patent Document 1 cannot be sufficiently obtained. As described above, the absorbent article described in Patent Document 1 has room for further improvement.

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

  The present invention includes a skin-side sheet that forms a skin-facing surface, a non-skin-side sheet that forms a non-skin-facing surface, and a longitudinally long shape that is interposed between both the sheets and corresponds to the wearer's front-rear direction. An absorbent article comprising an absorbent core and divided into an excretion facing area disposed opposite to the wearer's liquid excretion part, and a front area and a rear area disposed before and after the excretion facing area in the longitudinal direction. 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 a middle-high portion that is thicker than the thickness in the second region, and the middle-high portion has a length in a lateral direction perpendicular to the longitudinal direction of the absorbent core in plan view of the absorbent core. Has a maximum width portion, and the length in the lateral direction at the maximum width portion A pair of front squeezing grooves extending in the longitudinal direction on the front section side, as linear squeezing grooves in which the skin-side sheet and the absorbent core are squeezed and integrated. And a pair of rear pressing grooves extending in the longitudinal direction on the rear section side, and in the excretion facing section, each front pressing groove and each rear pressing groove has a non-groove portion that is not connected as a groove. The pair of front squeezing grooves and the pair of rear squeezing grooves each provide an absorbent article that intersects with a boundary portion between the middle high portion and the portion other than the middle high portion in the absorbent core. Is.

  According to the present invention, even when the absorbent article is worn in a slightly displaced state, it is less likely to form a gap with the wearer's skin due to excellent fit to the body shape, and flows through the surface of the skin side sheet. The liquid flow is prevented and sufficient absorption performance can be exhibited.

FIG. 1 is a plan view showing the skin facing surface side (skin side sheet side) of the sanitary napkin of the first 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: is a top view which shows the skin opposing surface side (skin side sheet | seat side) of the sanitary napkin of preferable 2nd Embodiment of the absorbent article of this invention.

  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 1st Embodiment from the skin side sheet | seat side is shown by FIG. As shown in FIG. 1, the napkin 1 according to the first embodiment includes a skin-side sheet 2 that forms a skin-facing surface, a non-skin-side sheet 3 that forms a non-skin-facing surface, and the two sheets 2 and 3. It has an absorbent core 41 that is interposed and is long in the longitudinal direction X corresponding to the front-rear direction of the wearer. 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 (vertical direction X) means the “length” that is a distance measured in the vertical direction X, and the length in the lateral direction Y The length means “width” which is a distance measured in the lateral direction Y. The napkin 1 is formed symmetrically with respect to a center line CL1 extending in the vertical direction X. The vertical direction X is also a direction parallel to the center line CL1. Moreover, in this specification, a skin opposing surface is a surface turned to a wearer's skin side at the time of wear of the absorptive article (napkin 1) in the absorptive article (napkin 1) or its constituent member, for example, absorber 4. The non-skin facing surface is directed to the side opposite to the skin side (clothing side) when the absorbent article (napkin 1) is worn in the absorbent article (napkin 1) or its constituent member, for example, the absorbent body 4 It is a surface that is

  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 (one wing) having the wing portion 1W in the longitudinal direction X when the wing portion 1W is provided like the napkin 1 of the first embodiment. Means a region sandwiched between a root along the vertical direction X of the portion 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 first 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. An absorber 4 interposed between the three is provided. 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 horizontal direction Y due to the curve are alternately and continuously arranged in the vertical direction X are arranged symmetrically in the horizontal direction Y about the center line CL1 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 opens toward the center line CL1, 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 portion 1S projects greatly outward in the lateral direction Y in the excretion facing area B, whereby the napkin 1 has both left and right sides along the vertical direction X. A pair of wing portions 1W and 1W extending outward from the outer side are provided. 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, 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. And has an intermediate region 41M between the first region 41F and the second region 41R. In the napkin 1, the intermediate area 41M of the absorbent core 41 and the excretion facing area B coincide with each other in the vertical direction. The middle region 41M includes a middle-high portion 42 that is thicker than the first region 41F and the second region 41R. Therefore, in the napkin 1, the intermediate region 41M of the absorbent core 41 is disposed in the excretion facing area B. In the napkin 1, the middle region 41M has the middle-high portion 42, and the length of the middle region 41M and the length of the middle-high portion 42 coincide with each other in the vertical direction.

  When the pair of wing portions 1W are provided on both outer sides in the lateral direction Y as in the case of the napkin 1, the intermediate region 41M is provided between the roots of the wing portions 1W arranged at intervals in the longitudinal direction X in each wing portion 1W. Is present. More specifically, the excretion facing area B of the napkin 1 exists between the roots of the wing portions 1W arranged at intervals in the vertical direction X in 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.

  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. 3, the middle-high portion 42 included in the intermediate region 41 </ b> M is formed thicker than the thickness of the first region 41 </ b> F in the absorbent core 41. Further, the middle / high portion 42 is formed to have a thickness larger than the thickness of 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. The thickness and basis weight of each of the first region 41F and the second region 41R to be compared with the thickness and basis weight of the middle-high portion 42 are obtained when a groove 45 described later is formed in the first region 41F and the second region 41R. Means the thickness and basis weight of the first region 41F and the second region 41R where there is no groove 45. 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 and high portions 42 are provided in the excretion facing area B like the napkin 1 of the first embodiment.
Specifically, 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 Is 2.0 mm or more and 10.0 mm or less, more preferably 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.
Specifically, 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. Moreover, it 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.
In the napkin 1, it is preferable that the thickness of the first region 41F or the second region 41R is substantially uniform in a portion where a groove 45 described later does not exist, but the side of the first region 41F or the second region 41R. In the case where a gradual increase / decrease in thickness is provided in the direction Y or the vertical direction X, it is only necessary that the above relationship is satisfied in the thickest portion.
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.

  The middle-high portion 42 has a maximum width portion in which the length in the lateral direction Y perpendicular to the longitudinal direction X of the absorbent core 41 is maximized in plan view of the absorbent core 41 as shown in FIG. The length of the maximum width portion in the horizontal direction Y is the same as the length of the absorbent core 41 in the horizontal direction Y. 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. As for the maximum width part of the middle-high part 42, it is desirable that the skin side width and the non-skin side width are substantially the same, and it is desirable that the maximum width part be 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 and high portions 42 extend on the entire length in the lateral direction Y orthogonal to the longitudinal direction X of the absorbent core 41 and are on both sides along the longitudinal direction X of the absorbent core 41 as shown in FIG. 2. It has a middle-high central portion 421 extending to a predetermined length in the longitudinal direction X along the edges 41s, 41s. The middle-high part 42 is a front-side convex part 422 or a rear part whose length in the lateral direction Y is narrower than the maximum width part of the middle-high part 42 from the middle-high center part 421 toward the front section A side or the rear section C side. The napkin 1 is preferably provided with a side convex portion 423, and in the napkin 1, one front side convex portion 422 that protrudes from the front end portion in the longitudinal direction X of the middle-high center portion 421 toward the first region 41F side, and the middle-high center It has one rear side convex part 423 that is convex from the rear end part of the longitudinal direction X of the part 421 toward the second region 41R side. 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, the middle-high center portion 421 of the middle-high portion 42 extends in a band shape between both side edges 41 s and 41 s along the longitudinal direction X of the absorbent core 41 as shown in FIG. 2.

  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. It is formed as follows. That is, the center portion arranged on the center line CL1 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.

  As shown in FIG. 4, the middle-high center portion 421 of the middle-high portion 42 has a smaller basis weight from the center portion in the lateral direction Y toward the side edge portions along the longitudinal direction X as viewed in cross section. It is formed as follows. That is, the center portion disposed on the center line CL1 extending in the vertical direction X in the middle-high center portion 421 has 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.

As shown in FIG. 4, the middle-high center portion 421 of the napkin 1 has a height at the side edge 41 s having the smallest height of the height (T1) of the center portion arranged on the center line CL1 as viewed in cross section. 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.
In addition, the middle and high-center portion 421 of the napkin 1 has a basis weight of the first region 41F and the second region 41R in the absorbent core 41 at least on the skin contact surface side from the viewpoint of preventing unexpected wrinkles and folds on the napkin 1. The basis weight is lower than that of the recess. 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.

  Moreover, in the napkin 1, as shown in FIG. 2, the front side convex part 422 convex toward the 1st area | region 41F side is distribute | arranged to the front-end part of the middle-high center part 421. As shown in FIG. In the napkin 1, the front side convex part 422 is arranged on the center line CL1 in which the top part 422t of the front side convex part 422 extends in the vertical direction X, and both sides 422s and 422s forming the front side convex part 422 are Each extends linearly from the top 422t to the side edge 41s along the longitudinal direction X of the absorbent core 41. Therefore, in the napkin 1, on the first region 41F side of the intermediate region 41M, the boundary portion BL between the middle-high portion 42 and the portion other than the middle-high portion 42 extends in a straight line shape, and a front middle-high boundary groove 43a described later is also included. It extends in a straight line shape.

  Moreover, in the napkin 1, as shown in FIG. 2, the back side convex part 423 convex toward the 2nd area | region 41R side is distribute | arranged to the rear-end part of the middle-high center part 421 at one. In the napkin 1, the rear side convex part 423 is arranged on the center line CL1 in which the top part 423t of the rear side convex part 423 extends in the vertical direction X, similarly to the front side convex part 422. Both side sides 423s and 423s to be formed extend in a straight line shape from the top portion 423t to the side edge 41s along the longitudinal direction X of the absorbent core 41. Therefore, in the napkin 1, on the second region 41R side of the intermediate region 41M, a boundary portion BL between the middle high portion 42 and a portion other than the middle high portion 42 extends in a straight line shape, and a rear middle high boundary groove 43c described later is also formed. It extends in a straight line shape.

  As shown in FIG. 1, the napkin 1 includes a pair of wing portions 1 </ b> W and 1 </ b> W on both outer sides in the lateral direction Y. In the napkin 1, the front imaginary line ILa that connects the roots located on the front section A side in the pair of wing portions 1W and 1W extends along both sides 422s and 422s that form the front convex portion 422. Although it does not intersect with the portion BL and is disposed on the top portion 422t of the front convex portion 422, it may intersect with the boundary portion BL. Further, the rear imaginary line ILc that connects the roots located on the rear section C side in the pair of wing portions 1W, 1W intersects with the boundary portion BL extending along the both sides 423s, 423s forming the rear convex portion 423. However, although it distribute | arranged on the top part 423t of the back side convex part 423, you may cross | intersect the boundary part BL. In other words, in the napkin 1, two folding lines (not shown) that cross the napkin 1 in the lateral direction Y that are generated when the napkin 1 is folded into a three-fold individual form are shown in the vertical direction X of the napkin 1. The first first folding line counted from the front end may be arranged at a position intersecting with the boundary portion BL extending along the both side sides 422s and 422s forming the front convex portion 422. In addition, the second second folding line as counted from the front end in the longitudinal direction X of the napkin 1 is arranged at a position intersecting with the boundary portion BL extending along the both sides 423 s and 423 s forming the rear convex portion 423. Also good. By arranging a folding line generated when the napkin 1 is folded into the individual form at the positions on the tops 422t and 423t, a plurality of shallow foldings can be performed while the boundary part BL also serves as a folding point without being folded deeply only on the folding line. Since it produces | generates, the clearance gap between the napkin 1 and a body reduces. Thereby, the flow of the body fluid which flows along the folding line can be prevented. From this point of view, in the napkin 1, at least the first folding line is arranged at a position intersecting the boundary portion BL of the front convex part 422, or the second folding line is a boundary of the rear convex part 423. Preferably, the first folding line is arranged at a position intersecting with the boundary part BL of the front convex part 422, and the second folding line is arranged at the rear convex part. More preferably, it is arranged at a position intersecting with the boundary portion BL of 423.

  In the napkin 1, as shown in FIG. 2, when the absorbent core 41 is viewed in plan, the front-side convex portion 422 gradually decreases in length in the lateral direction Y from the middle-high central portion 421 toward the first region 41 </ b> F side. In addition, the length of the rear side convex portion 423 in the lateral direction Y gradually becomes narrower from the middle-high central portion 421 toward the second region 41R side. That is, the front-side convex portion 422 and the rear-side convex portion 423 in the absorbent core 41 have their widths d from the both side portions along the vertical direction X toward the top portions 422t and 423t located at the central portion in the horizontal direction Y, respectively. Is formed so as to gradually decrease. 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 CL1 extending in the longitudinal 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 / higher adjacent portion 44a is formed symmetrically with respect to the center line CL1 extending in the vertical direction X. In the front middle-high adjacent portion 44a, the half portion on the side edge 41s side along the longitudinal direction X of the absorbent core 41 with respect to the center line CL1 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 CL1. The rear middle-high adjacent portion 44c is also formed symmetrically with respect to the center line CL1 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 CL1 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 CL1.

In the napkin 1, as shown in FIG. 3, the middle-high adjacent portion 44 is formed so that its 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

  As shown in FIG. 2, in the napkin 1, the first core 41 </ b> F and the second region 41 </ b> R are partitioned by a groove 45 and a groove 45 extending in the vertical direction X and the horizontal direction Y when viewed in plan. A plurality of small absorbing portions 46 formed by being formed are arranged. The small absorption part 46 arranged in this way has a basis weight higher than the basis weight of the groove part 45. The groove portions 45 arranged in the first region 41F and the second region 41R include 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. Thus, if it has the groove part 45 and the small absorption part 46 in the 1st area | region 41F and the 2nd area | region 41R, the softness | flexibility of the 1st area | region 41F and the 2nd area | region 41R will improve, and a fit property to a wearer. Will improve.

  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.

  In the napkin 1, as shown in FIG. 1, the skin side sheet | seat 2 and the absorptive core 41 are provided with the linear pressing groove 7 by which pressing integration was carried out. Preferably, in the napkin 1, a linear compressed groove 7 is formed on the skin-facing surface of the skin-side sheet 2 so that the skin-side sheet 2 and the absorbent body 4 are integrally recessed toward the non-skin-side sheet 3 side. ing. “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, as long as the linear pressing groove 7 is extended linearly, the thickness of the bottom part of a groove | channel may be constant, and the thickness of the bottom part of a groove | channel may not be constant. Examples of the compressed groove in which the thickness of the bottom of the groove is not constant include, for example, a relatively deeply recessed portion (high pressure portion) and a relatively shallowly recessed portion (low pressure portion) at the bottom of the compressed groove. The form currently formed is mentioned. 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.

  In the napkin 1, as shown in FIG. 1, a pair of front pressing grooves 71 extending in the longitudinal direction X on the front section A side as the linear pressing grooves 7 in which the skin-side sheet 2 and the absorbent core 41 are compressed and integrated. , 71 and a pair of rear pressing grooves 72, 72 extending in the longitudinal direction X on the rear section C side, and in the excretion facing section B, each front pressing groove 71 and each rear pressing groove 72 are connected as a groove. There is no non-grooved portion 7N. In the napkin 1, the pair of front pressing grooves 71, 71 extends from the front area A to a part of the excretion facing area B. Further, the pair of rear squeezing grooves 72, 72 extend from the rear area C to a part of the excretion facing area B. Here, the non-groove portion 7N means that the skin side sheet 2 and the absorbent body 4 are not recessed toward the non-skin side sheet 3 side, and the non-skin side sheet 3 side from the skin facing surface side of the skin side sheet 2 It means the part which is not depressed toward Therefore, by disposing the non-groove portion 7N between the front pressing groove 71 and the rear pressing groove 72, the groove of the front pressing groove 71 and the groove of the rear pressing groove 72 are separated with a space therebetween, and the front pressing groove 71 and the rear pressing groove 72 are not connected as a continuous recess.

  In the napkin 1, as shown in FIG. 1, the pair of front squeezing grooves 71, 71 and the pair of rear squeezing grooves 72, 72 are respectively the middle high part 42 and the part other than the middle high part 42 in the absorbent core 41. Crosses the boundary portion BL. Preferably, in the napkin 1, the boundary portion BL extends along both side sides 422 s and 422 s forming the front side convex portion 422, and extends along both side sides 423 s and 423 s forming the rear side convex portion 423. Yes. For this reason, the pair of front pressing grooves 71, 71 intersect with the boundary portion BL extending along the both sides 422 s, 422 s forming the front convex portion 422. And a pair of back pressing grooves 72 and 72 cross | intersect the boundary part BL extended along the both sides 423s and 423s which form the back side convex part 423. FIG. Moreover, as above-mentioned, the middle-high boundary groove part 43 is extended along the boundary part BL, and a pair of front pressing groove 71,71 and a pair of back pressing groove 72,72 are the middle-high boundary groove part of the absorptive core 41 Crosses with 43. Specifically, the pair of front squeezing grooves 71, 71 intersect with the front middle / high boundary groove part 43 a extending along both side sides 422 s, 422 s forming the front side convex part 422 constituting the middle high part 42. And a pair of back pressing grooves 72 and 72 cross | intersect the back middle / high boundary groove part 43c extended along the both sides 423s and 423s which form the back side convex part 423. FIG.

  In the napkin 1, the non-groove portion 7N of the linear compressed groove 7 is disposed on a horizontal center line CL2 extending in parallel to the horizontal direction Y through the center position CP of the napkin 1 as shown in FIG. Is preferred. The length of the non-grooved portion 7N is synonymous with the interval between the end of the front compressed groove 71 and the end of the rear compressed groove 72. In the napkin 1, the non-grooved portion 7N of the linear compressed groove 7 Since it arrange | positions on the horizontal centerline CL2 extended to Y, the napkin 1 does not bend in a specific position and generation | occurrence | production of the wrinkles which inhibit absorption performance can be suppressed. In particular, with respect to the force from the thigh at the time of wearing, the middle-high part 42 is deformed into a convex shape along the shape of the user, and can be flexibly fitted to the body shape. Therefore, the liquid flow which flows in the horizontal direction Y on the surface of the skin side sheet | seat 2 can be prevented, and sufficient absorption performance can be expressed. Furthermore, the non-groove portion 7N sandwiched between the end portion of the front squeezing groove 71 and the end portion of the rear squeezing groove 72 is disposed, so that the liquid can be sufficiently absorbed and diffused in the excretion facing area B, Inadvertent diffusion of liquid into zone A and rear zone C is difficult to occur. In addition, if the distance between the end of the front squeezing groove 71 and the end of the squeezing squeezing groove 72 is too long, deformation that induces leakage in the non-grooved part is likely to occur, so that the fit in the excretion facing area From the viewpoint of improving the absorption of the excreted liquid without impairing the properties, the length of the non-groove portion 7N is preferably 20 mm or more, more preferably 50 mm or more, and preferably 110 mm or less, more preferably 90 mm. Or less, preferably 20 mm or more and 110 mm or less, more preferably 50 mm or more and 90 mm or less. As a result, even if the absorbent article is worn in a slightly displaced state, the liquid flow that flows on the surface of the skin-side sheet is less likely to form a gap with the wearer's skin by being excellent in fit to the body shape. And sufficient absorption performance can be achieved.

  In the napkin 1, as shown in FIG. 1, the pair of front pressing grooves 71, 71 are respectively a front section side pressing groove 71 a extending from the boundary portion BL of the absorbent core 41 to the front section A side, and an absorbent property. It has a front middle high pressure groove 71b extending from the boundary portion BL of the core 41 to the middle high portion 42 side. The front section side compressed groove 71a extends in the longitudinal direction X from the boundary portion BL on the front section A side to the front section A side. The front middle high-pressure groove 71b extends in the vertical direction X from the boundary portion BL on the front section A side toward the horizontal center line CL2 toward the middle high portion 42 side. The pair of forward pressing grooves 71 and 71 are formed symmetrically with respect to the center line CL1.

  In the napkin 1, as shown in FIG. 1, the pair of front section side squeezing grooves 71a, 71a are respectively convex from the center line CL1 toward the lateral direction Y outward. In the napkin 1, the front area side pressing groove 71a that protrudes outward in the lateral direction Y has a top portion 71a1 at the root along the longitudinal direction X of one wing portion 1W and the longitudinal direction X of the other wing portion 1W. It is arranged on the front side imaginary line ILa that connects the roots along the line, but the shape of the front area A of the absorbent article 1 is kept in a stable shape without being complicatedly bent during use. From the viewpoint that it is difficult to form a gap between the skin and the absorbent article 1, is excellent in fit to the body shape, and can exhibit sufficient absorption performance, in other words, the front area side compressed. It is preferable that the top portion 71a1 of the groove 71a is disposed outside the region T sandwiched between the root along the longitudinal direction X of one wing portion 1W and the root along the longitudinal direction X of the other wing portion 1W. In the case of an absorbent article that does not have the wing part 1W unlike the napkin 1, the top 71a1 of the front section side compressed groove 71a is generated when the absorbent article is folded into a three-fold individual form. About two folding lines (not shown) crossing the article in the transverse direction Y, outside the region surrounded by the first folding line and the second folding line, counting from the front end in the longitudinal direction X of the absorbent article It is preferable to be arranged in

  In the napkin 1, the pair of front intermediate high pressure grooves 71b and 71b respectively extend from the boundary portion BL of the absorbent core 41 on the front section A side toward the center position CP in the excretion facing section B, as shown in FIG. Has a part. In the napkin 1, the extending portion of each front middle high-pressure groove 71b extends linearly from the boundary portion BL of the absorbent core 41 toward the center position CP. As a result, the napkin 1 is not easily bent from the boundary portion BL as a starting point, and does not bend near the boundary portion BL of the middle-high portion 42. Therefore, the napkin 1 can stably follow the body with respect to complicated movement during use. By maintaining the shape, it is difficult to form a gap with the wearer's skin, and it is preferable in that the liquid flow that flows on the surface of the skin-side sheet 2 can be prevented and sufficient absorption performance can be exhibited. Furthermore, it is still more preferable that a pair of front area side pressing groove 71a and the front middle high pressure pressing groove 71b are in contact.

  The pair of rear squeezing grooves 72, 72 may have the same shape as or different from the pair of front squeezing grooves 71, 71. In the napkin 1, as shown in FIG. The shape of the pair of rear pressing grooves 72, 72 is the same shape as the shape of the pair of front pressing grooves 71, 71. Preferably, the pair of rear squeezing grooves 72, 72 are respectively formed from a rear area side compressed groove 72 c extending from the boundary part BL of the absorbent core 41 to the rear area C side and a boundary part BL of the absorbent core 41. A rear middle high-pressure groove 72b extending to the middle-high portion 42 side. The rear section side compressed groove 72c extends in the longitudinal direction X from the boundary section BL on the rear section C side to the rear section C side. The rear middle high-pressure groove 72b extends in the vertical direction X from the boundary portion BL on the rear section C side toward the middle center portion CL2 toward the middle center portion CL2. The pair of rear pressing grooves 72, 72 are formed symmetrically with respect to the center line CL1.

  In the napkin 1, as shown in FIG. 1, the pair of rear section-side compressed grooves 72 c and 72 c are convex from the center line CL 1 toward the lateral direction Y outward. In the napkin 1, the rear section side compressed groove 72c that protrudes outward in the lateral direction Y has a top 72c1 at the base along the longitudinal direction X of one wing portion 1W and the longitudinal direction X of the other wing portion 1W. However, the rear section C of the napkin 1 is arranged outside the rear virtual line ILc from the viewpoint of maintaining a stable shape without being bent in a complicated manner. In other words, the top portion 72c1 of the rear section side compressed groove 72c is outside the region T sandwiched between the root along the longitudinal direction X of one wing portion 1W and the root along the longitudinal direction X of the other wing portion 1W. It is preferable that it is arranged. In the case of an absorbent article that does not have the wing part 1W unlike the napkin 1, the top part 72c1 of the rear section side compressed groove 72c is generated when the absorbent article is folded into a three-fold individual form. About two folding lines (not shown) crossing the article in the transverse direction Y, outside the region surrounded by the first folding line and the second folding line, counting from the front end in the longitudinal direction X of the absorbent article It is preferable to be arranged in

  In the napkin 1, the pair of rear middle high-pressure grooves 72b and 72b respectively extend from the boundary portion BL of the absorbent core 41 on the rear section C side toward the center position CP in the excretion facing section B, as shown in FIG. Has a part. In the napkin 1, the extending part of each rear middle high-pressure groove 72b extends linearly from the boundary part BL of the absorbent core 41 toward the center position CP.

  In the napkin 1, a pair of front medium and high pressure squeezes is prevented from preventing leakage in the lateral direction Y in the excretion facing area B and maintaining the flexibility of the absorbent core 41 in the region outward from the boundary portion BL of the absorbent core 41. It is preferable that each of the grooves 71b and 71b is formed such that the depth from the skin side sheet 2 side is deeper than the depth from the skin side sheet 2 side of the front section side compressed groove 71a. Here, the fact that the depth of the front middle high-pressure groove 71b arranged in the middle-high portion 42 is formed deeper than the depth of the front section-side pressure groove 71a is that the compression strength of the front middle high-pressure groove 71b is higher than the middle-high portion 42. It means that it is higher than the compression strength of the forward section side compressed groove 71a arranged in the other area.

  In the napkin 1, from the same viewpoint as the front pressing groove 71, each of the pair of rear intermediate high pressure grooves 72b and 72b has a depth from the skin side sheet 2 side, and the skin side sheet 2 of the rear section side pressing groove 72c. It is preferably formed deeper than the depth from the side. Here, the fact that the depth of the rear middle high-pressure groove 72b arranged in the middle-high portion 42 is formed deeper than the depth of the rear section-side pressure groove 72c is that the compression strength of the front middle high-pressure groove 71b is higher than the middle-high portion 42. It means that it is higher than the compression strength of the rear section side compressed groove 72c arranged in the other area.

The formation material of each structural member of the napkin 1 of 1st 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-melt blown-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 thereto, 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 front pressing groove 71 and the rear pressing groove 72) can be formed in accordance with a conventional method by pressing with or without heat (so-called embossing), or embossing such as ultrasonic embossing. .

The effect of the napkin 1 of 1st 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, sufficient absorption performance can be exhibited. Moreover, in the napkin 1, as the linear pressing groove 7 by which the skin side sheet | seat 2 and the absorptive core 41 were squeezed and integrated, a pair of front pressing grooves 71 and 71 extended in the vertical direction X by the front area A side, and back It has a pair of rear pressing grooves 72, 72 extending in the longitudinal direction X on the area C side, and the pair of front pressing grooves 71, 71 and the pair of rear pressing grooves 72, 72 are respectively medium-high in the absorbent core 41. It intersects with a boundary portion BL between the portion 42 and a portion other than the middle-high portion 42. Therefore, the absorbent core 41 is not easily bent starting from the boundary portion BL, and does not bend in the vicinity of the boundary portion BL of the middle-high portion 42, so that it has excellent followability with respect to complicated movement during use. Therefore, the liquid flow which flows on the surface of the skin side sheet | seat 2 can be prevented, and sufficient absorption performance can be expressed. Moreover, since each front pressing groove 71 and each back pressing groove 72 have the non-groove part 7N which is not connected as a groove in the excretion facing area B, the surface of the skin-side sheet 2 is disposed in the excretion facing area B. The liquid flow flowing in the lateral direction Y can be prevented, and sufficient absorption performance can be exhibited. In particular, in the napkin 1, since the non-groove portion 7N of the linear compressed groove 7 is arranged on the horizontal center line CL2 extending in the horizontal direction Y, the napkin 1 bends at a specific position in the excretion facing area B. In addition, since the middle and high portions 42 are deformed and fit into a shape that matches the user's body shape, the liquid flow that flows in the lateral direction Y on the surface of the skin side sheet 2 can be further prevented, and sufficient absorption performance can be exhibited. .

  Moreover, in the napkin 1, as shown in FIGS. 1-2 and 6, the said maximum width part is extended to predetermined length in the vertical direction X according to the both-sides edge along the vertical direction X of the absorptive core 41. As shown in FIG. It has a middle / high central portion 421 to be formed. 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, in the napkin 1, as shown in FIG. 1, a pair of front pressing grooves 71 and 71 are respectively bounded by a front section side pressing groove 71a extending from the boundary portion BL of the absorbent core 41 to the front section A side. It has a front middle high pressure groove 71b extending from the portion BL to the middle high portion 42 side. In addition, the pair of rear pressing grooves 72, 72 are respectively a rear section side pressing groove 72c extending from the boundary portion BL to the rear section C side, and a rear middle high pressure pressing groove extending from the boundary portion BL to the middle high section 42 side. 72b. And a pair of front area side pressing groove 71a, 71a is convex toward the horizontal direction Y outward, respectively. Moreover, a pair of back area side squeezing grooves 72c and 72c are convex toward the lateral direction Y outward, respectively. Therefore, when the napkin 1 is used, the absorbent core 41 does not easily bend starting from the boundary portion BL against the force from the thighs of both legs to the inside in the lateral direction Y, and the shape of the front section A is complicated. A stable shape is maintained without bending, and it is difficult to create a gap between the napkin 1 and the skin when in use, and it is more excellent in fit to the body shape, thereby preventing liquid flow flowing on the surface of the skin side sheet 2 And sufficient absorption performance can be achieved.

  Moreover, in the napkin 1, as shown in FIG. 1, a pair of front middle high pressure grooves 71b, 71b extend from the boundary portion BL of the absorbent core 41 on the front section A side toward the central position CP in the excretion facing section B. The pair of rear middle high-pressure grooves 72b, 72b has a portion extending from the boundary portion BL of the absorbent core 41 on the rear region C side toward the central position CP in the excretion facing region B. Therefore, when the absorbent core 41 is deformed with respect to the force from the thighs of both legs to the inside in the lateral direction Y during use of the napkin 1, it is easier to fit into the body shape and the shape is crushed by external force. Sufficient absorption performance can be expressed because it is easily maintained without any problems.

  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 is convex toward the 2nd area | region 41R side from the rear-end part of the vertical direction X of the middle-high center part 421. Therefore, even if the napkin 1 is worn in a slightly displaced state, if the middle and high parts 42 have the front side convex part 422 and the rear side convex part 423, the lateral direction Y inside of the napkin 1 from both thighs By deforming the front-side convex part 422 and the rear-side convex part 423 with respect to the force to the middle, the middle-high part 42 is excellent in followability to the body shape, and it is difficult to give the wearer a sense of incongruity. In particular, in the napkin 1, on the first region 41F side of the intermediate region 41M, the boundary portion BL between the middle high portion 42 and the portion other than the middle high portion 42 extends in a straight line shape, and the second region 41R side of the intermediate region 41M , A boundary portion BL between the middle-high portion 42 and a portion other than the middle-high portion 42 extends in a straight line shape. Therefore, the middle-high part 42 is further excellent in the followability to the body shape, 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 front middle / high boundary groove 43a and the rear middle / high boundary groove 43c of the middle / high boundary groove 43 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 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 leg portion, and the napkin 1 can easily fit three-dimensionally along the shape of the body. .

  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.

  Next, the napkin 1 of 2nd Embodiment of this invention is demonstrated. The napkin 1 of 2nd Embodiment differs from the form of the linear pressing groove 7 with which the form of the linear pressing groove 7 with which the napkin 1 of 1st Embodiment is provided. About the napkin 1 of 2nd Embodiment, a different point from the napkin 1 of 1st Embodiment is mainly demonstrated, the same code | symbol is attached | subjected about the same point, and description is abbreviate | omitted. For the points not particularly mentioned, the description relating to the napkin 1 of the first embodiment is applied as appropriate. Moreover, about the effect of the napkin 1 of 2nd Embodiment, a different point from the effect of the napkin 1 of 1st Embodiment is demonstrated, The point which is not demonstrated in particular is the same as the effect of the napkin 1 of 1st Embodiment, The description of the effect of the napkin 1 of the first embodiment is applied as appropriate.

  As for the napkin 1 of 2nd Embodiment, as shown in FIG. 6, a pair of front pressing grooves 71 and 71 are the front area side pressing grooves which respectively extend from the boundary part BL of the absorptive core 41 to the front area A side. 71a and a front intermediate high-pressure groove 71b extending from the boundary portion BL of the absorbent core 41 to the middle-high portion 42 side. Further, the pair of rear pressing grooves 72, 72 are respectively a rear section side pressing groove 72 c extending from the boundary section BL of the absorbent core 41 to the rear section C side, and a middle high section from the boundary section BL of the absorbent core 41. And a rear middle high-pressure groove 72b extending to the 42 side. In the napkin 1 shown in FIG. 6, the pair of front section side squeezing grooves 71a and 71a are curved in a convex shape toward the lateral direction Y outward. Moreover, a pair of back area side squeezing grooves 72c, 72c are each curved in a convex shape toward the lateral direction Y. The pair of front intermediate high-pressure grooves 71b and 71b are each curved in a convex shape toward the inner side in the lateral direction Y. In addition, the pair of rear middle high-pressure grooves 72b and 72b each have a convex curve shape inward in the lateral direction Y. Preferably, each front middle high pressure squeezed 71b has a portion extending from the boundary portion BL on the front section A side toward the central position CP in the excretion facing section B, and continuously inward in the lateral direction Y from the extending section. It has the part which becomes convex curvilinear toward. Each rear middle high-pressure groove 72b has a portion extending from the boundary portion BL on the rear section C side toward the central position CP in the excretion facing section B, and continuously inward in the lateral direction Y from the extending section. It has a portion that is convexly convex. Thus, in the napkin 1 shown in FIG. 6, the pair of front intermediate high-pressure grooves 71b, 71b and the pair of rear intermediate high-pressure grooves 72b, 72b are curved in a convex shape inward in the lateral direction Y. While wearing, it is easy to induce a break in the vertical direction X starting from the top portions 71b1, 71b1 of the pair of front intermediate high-pressure grooves 71b, 71b and the top portions 72b1, 72b1 of the pair of rear intermediate high-pressure grooves 72b, 72b. The bending at the boundary portion BL can be suppressed.

  A pair of front middle high-pressure grooves 71b, 71b1 that draw a convex curve shape inward in the lateral direction Y, and a pair of rear intermediate high-pressure grooves that draw a convex curve shape inward in the horizontal direction Y At least one of the top portions 72b1 and 72b1 of 72b and 72b is arranged inside a region T sandwiched between a root along the longitudinal direction X of one wing portion 1W and a root along the longitudinal direction X of the other wing portion 1W. In the napkin 1 of the second embodiment, as shown in FIG. 6, the top portions 71b1 and 71b1 of the pair of front intermediate high-pressure grooves 71b and 71b and the top portions 72b1 of the pair of rear middle high-pressure grooves 72b and 72b. 72b1 is arranged inside the region T. As described above, in the napkin 1 shown in FIG. 6, the top portions 71b1 and 71b1 of the pair of front intermediate high pressure grooves 71b and 71b and the top portions 72b1 and 72b1 of the pair of rear intermediate high pressure grooves 72b and 72b are arranged inside the region T. Therefore, when using the napkin 1 fixed to the crotch portion of the clothes by the wing portion 1W, the top portions 71b1 and 71b1 of the pair of front intermediate high pressure grooves 71b and 71b and the top portions of the pair of rear intermediate high pressure grooves 72b and 72b 72b1, 72b1 as a starting point, it is easier to guide the middle-high portion 42 to be deformed into a convex shape toward the skin, and in addition, the shape is easily maintained without being crushed by an external force. Further, bending at the boundary portion BL of the absorbent core 41 can be suppressed.

  Moreover, the middle-high part 42 and the middle-high part 42 in the absorptive core 41 inside the area | region T pinched | interposed into the root along the vertical direction X of one wing part 1W and the vertical direction X of the other wing part 1W. Intersection IP, IP at which the boundary portion BL on the front section A side and the pair of front pressing grooves 71, 71 intersect with the other portions, and the boundary section BL on the rear section C side and the pair of rear pressing grooves 72, In the napkin 1 of the second embodiment, as shown in FIG. 6, the intersection points IP, IP on the front section A side are located inside the region T, as shown in FIG. Intersection points IP and IP on the IP and rear section C side are arranged. In this way, in the napkin 1 shown in FIG. 6, the intersection points IP and IP on the front section A side and the intersection points IP and IP on the rear section C side are arranged inside the region T. The entire napkin 1 can be easily fixed to the crotch portion, and unexpected bending at the boundary portion BL of the absorbent core 41 and in the vicinity thereof can be suppressed.

  In the napkin 1 of 2nd Embodiment, as shown in FIG. 6, the linear pressing groove 7 has the front horizontal pressing groove 73a extended in the horizontal direction Y at the front area A, and the back horizontal extending in the horizontal direction Y at the rear area C. And a pressing groove 73c. The front lateral pressing groove 73a and the rear lateral pressing groove 73c each have a curved shape that is convex outward in the vertical direction X. In the napkin 1 of 2nd Embodiment, as for the linear pressing groove 7, the front horizontal pressing groove 73a is distribute | arranged between a pair of front pressing grooves 71 and 71, the end of the front horizontal pressing groove 73a, and the end of the front pressing groove 71 Are connected, a rear lateral pressing groove 73c is arranged between the pair of rear pressing grooves 72, 72, and the end of the rear lateral pressing groove 73c and the end of the rear pressing groove 72 are connected. In the napkin 1 of 2nd Embodiment, the both ends of the front horizontal pressing groove 73a are respectively connected with the edge by the side of the front area A of the front area side pressing groove 71a of the front pressing groove 71, and both ends of the back side pressing groove 73c. However, the end of the rear section side compressed groove 72c of the rear section groove 72c is connected to the end of the rear section C side. The napkin 1 according to the second embodiment has a shape in which a pair of front pressing grooves 71, 71 and a front lateral pressing groove 73a on the front section A side are connected, and a pair of rear pressing grooves 72, 72 and a rear side on the rear section C side. It has the same shape as the shape to which the compressed groove 73c is connected. As described above, in the napkin 1 shown in FIG. 6, the curved front lateral pressing groove 73 a and the rear lateral pressing groove 73 c that protrude outward in the longitudinal direction X are respectively provided with the front pressing groove 71 and the rear pressing groove 72. Since they are connected, the flow of body fluid in the vertical direction X can be prevented.

  The absorbent article of this invention is not restrict | limited to the napkin 1 of the above-mentioned 1st-2nd embodiment at all, It can change suitably. Moreover, each component in the napkin 1 of the above-mentioned 1st-2nd embodiment can be implemented in combination suitably, in the range which does not impair the meaning of this invention.

  For example, in the napkin 1 of the first to second embodiments, with respect to the lateral center line CL2 that is a bisector of the absorbent article extending in the lateral direction Y in plan view as shown in FIGS. Although the shape of a pair of front pressing grooves 71, 71 and the shape of a pair of rear pressing grooves 72, 72 are symmetrical, the absorbent core 41 is similar to the napkin 1 of the first to second embodiments. When the shape of the first region 41F and the shape of the second region 41R are asymmetric with respect to the lateral center line CL2, the shape of the pair of front pressing grooves 71, 71 and the pair with respect to the lateral center line CL2 It is preferable that the shape of the rear pressing grooves 72, 72 is asymmetric. In other words, for example, in the napkin 1 of the second embodiment, a shape in which the pair of front pressing grooves 71, 71 and the front lateral pressing groove 73a on the front section A side are connected to each other, and the pair of rear pressing grooves 72 on the rear section C side. , 72 and the shape in which the rear lateral pressing groove 73c is connected are the same shape with the same size, but in accordance with the shape of the first region 41F and the shape of the second region 41R, respectively. It may have a different shape. In this way, the shape of the linear compressed groove 7 on the front section A side and the shape of the linear compressed groove 7 on the rear section C side are adjusted in accordance with the shape of the first region 41F and the shape of the second region 41R, respectively. If it does so, the bending in the boundary part BL of the absorptive core 41 can further be suppressed. Specifically, in the napkin 1 of the second embodiment, in the plan view as shown in FIG. 6, the vertical direction X is located at a position corresponding to the top 422 t (see FIG. 2) of the front convex portion 422 of the absorbent core 41. In the position corresponding to the top portion 423t of the rear side convex portion 423 of the absorbent core 41, the top portion of the front lateral pressing groove 73a that draws a convex curve shape outward is arranged in the longitudinal direction X outward. It is preferable from the viewpoint of exhibiting the above-mentioned effect that the top of the rear lateral pressing groove 73c that draws a convex curve toward the top is arranged.

  Moreover, in the napkin 1 of 1st Embodiment, as shown in FIG. 1, a pair of front squeezing grooves 71 and 71 are convex curvilinear toward the lateral direction Y outward from the centerline CL1, and a pair The rear squeezing grooves 72, 72 are curved in a convex shape outward from the center line CL1 in the lateral direction Y. The shape of the front squeezing groove 71 and the shape of the rear squeezing groove 72 are respectively absorbent. The shape is not particularly limited as long as it intersects the boundary portion BL of the core 41, and may have a shape extending in parallel to the center line CL1.

  Moreover, in the front side convex part 422 in the absorptive core 41 of the napkin 1, as shown in FIG. 2, both sides 422s and 422s are not bent, respectively, from the side edge 41s along the longitudinal direction X of the absorptive core 41. It extends straight and straight toward the top portion 422t, and the width d of the front convex portion 422 gradually decreases from the side edge 41s along the longitudinal direction X of the absorbent core 41 toward the top portion 422t. However, if the width d of the front-side convex portion 422 is merely gradually reduced, it may be gradually reduced. The front-side convex portion 422 extends straight and straight, and the width d of the front-side convex portion 422 gradually decreases from both side edges 41s, 41s along the longitudinal direction X of the absorbent core 41 toward the top portion 422t. By doing, it is preferable from the point that the mold release property at the time of releasing from the said accumulation recessed part 55 in the said fiber stacking apparatus improves in addition to the improvement to the fitting property to a body. The same applies to the rear convex portion 423.

  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.

  Further, the napkin 1 has the middle and high portions 42 in the excretion facing area B, but may extend from the excretion facing area B to a part on the front area A side or the rear area C side. For example, the front-side convex portion 422 extends from the middle-high center portion 421 of the excretion-facing area B to the front area A, and the rear-side convex portion 423 extends from the middle-high center portion 421 of the excretion-facing area B to the rear area C. It may extend to. In this way, when the middle-high portion 42 extends from the excretion-facing area B to the front section A side or the rear section C side, the middle-high section 42 is the outer peripheral area of the middle-high section 42 in the front section A or the rear section C. The thickness is thicker than the part.

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

  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, the absorbent core 41 of the napkin 1 is formed so that the groove portion 45 is recessed from the skin facing surface side toward the non-skin facing surface side, but the groove portion 45 is directed from the non-skin facing surface side to the skin facing surface side. It may be formed so as to be recessed. Thereby, liquid diffusibility and liquid retention are improved.

  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.

1 Sanitary napkin (absorbent article)
A Front area B Excretion opposing area C Rear area 2 Skin side sheet 3 Non-skin side sheet 4 Absorber 41 Absorbent core 41F Absorbent core first area 41M Absorbent core intermediate area 41R Absorbent core second area 42 Middle-high portion 421 Middle-high central portion 422 Front side convex portion 423 Rear-side convex portion 43 Middle-high boundary groove portion 44 Middle-high adjacent portion 45 Groove portion 46 Small absorption portion BL Boundary portion 5 between the middle-high portion and a portion other than the middle-high portion 5 Side sheet 6 Joint portion 7 Linear pressing groove 71 Front pressing groove 71a Front section side pressing groove 71a1 Top 71b Front middle high pressure groove 72 Rear pressing groove 72c Rear section side pressing groove 72c1 Top section 72b Rear middle high pressure groove 7N Non-groove portion 73a Front side pressing groove 73c Back side horizontal groove 73c Squeeze groove T area IP intersection

Claims (12)

A skin-side sheet that forms a skin-facing surface, a non-skin-side sheet that forms a non-skin-facing surface, and an absorbent core that is interposed between these two sheets and that is long in the longitudinal direction corresponding to the wearer's longitudinal direction An absorbent article divided into an excretion facing area disposed opposite to the liquid excretion part of the wearer, and a front area and a rear area disposed before and after the excretion facing area in the longitudinal direction,
Said absorbent core has an intermediate region between the second region located in the first region and the rear region side located at the front zone side, the intermediate region, said first region and said 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 width of the maximum width portion is The length is the same as the lateral length of the absorbent core;
A pair of front pressing grooves extending in the vertical direction on the front section side and a pair of rear ends extending in the vertical direction on the rear section side as linear pressing grooves in which the skin side sheet and the absorbent core are compressed and integrated. And having a non-grooved portion in which each of the front compressed grooves and each of the rear compressed grooves are not connected as a groove.
The non-groove portion is located between a longitudinally inner end portion of the front squeezing groove and a longitudinally inner end portion of the rear squeezing groove,
In the non-groove portion, the skin side sheet and the absorbent core are not recessed toward the non-skin side sheet side,
A pair of said front pressing groove and a pair of said back pressing groove are the absorbent articles which cross | intersect the boundary part of the parts other than this middle-high part and this middle-high part in the said absorptive core, respectively.   The absorbent article according to claim 1, wherein the non-grooved portion of the linear compressed groove is disposed on a lateral center line that extends parallel to the lateral direction through a center position of the absorbent article. The pair of front squeezing grooves respectively extend from the boundary part of the absorbent core to the front area side and from the boundary part of the absorbent core to the middle and high part side. A front middle high pressure squeeze,
The pair of rear squeezing grooves respectively extend from the boundary portion of the absorbent core to the rear region side, and from the boundary portion of the absorbent core to the middle-high portion side. A rear middle high pressure squeeze
The absorbent article according to claim 1 or 2, wherein each of the pair of front section side compressed grooves and the pair of rear section side compressed grooves has a curved shape that is convex outward in the lateral direction. The pair of front squeezing grooves respectively extend from the boundary part of the absorbent core to the front area side and from the boundary part of the absorbent core to the middle and high part side. A front middle high pressure squeeze,
The pair of rear squeezing grooves respectively extend from the boundary portion of the absorbent core to the rear region side, and from the boundary portion of the absorbent core to the middle-high portion side. A rear middle high pressure squeeze
The pair of front intermediate high-pressure grooves and the pair of rear intermediate high-pressure grooves each have a portion extending from the boundary portion of the absorbent core toward a central position in the excretion facing area. 4. The absorbent article according to any one of 3. The pair of front squeezing grooves respectively extend from the boundary part of the absorbent core to the front area side and from the boundary part of the absorbent core to the middle and high part side. A front middle high pressure squeeze,
The pair of rear squeezing grooves respectively extend from the boundary portion of the absorbent core to the rear region side, and from the boundary portion of the absorbent core to the middle-high portion side. A rear middle high pressure squeeze
A pair of said front middle high pressure squeezing and a pair of said back middle high pressure squeezing are respectively the absorptivity of any one of Claims 1-4 which become the convex curve shape toward a horizontal direction inner side. Goods. The absorbent article comprises a pair of wings extending outward from the left and right sides along the longitudinal direction,
At least one of the tops of the pair of front medium-high squeezes that draws a convex curve shape inward in the lateral direction and the top parts of the pair of rear medium-high squeezes that draw a convex curve shape inward in the horizontal direction The absorbent article according to claim 5, wherein the absorbent article is disposed inside a region sandwiched between a root along the longitudinal direction of one of the wing portions and a root along the longitudinal direction of the other wing portion. The pair of front squeezing grooves respectively extend from the boundary part of the absorbent core to the front area side and from the boundary part of the absorbent core to the middle and high part side. A front middle high pressure squeeze,
The pair of rear squeezing grooves respectively extend from the boundary portion of the absorbent core to the rear region side, and from the boundary portion of the absorbent core to the middle-high portion side. A rear middle high pressure squeeze
Each of the pair of front intermediate high-pressure grooves has a depth from the skin-side sheet side deeper than a depth from the skin-side sheet side of the front section-side compressed groove,
Each of a pair of said back middle high pressure squeezing is the depth from the said skin side sheet | seat side, respectively, The depth from the said skin side sheet | seat side of the said back area side pressing groove is any one of Claims 1-6 The absorbent article according to item 1.   In the plan view of the absorbent core, in the first region and the second region, a groove portion extending in the vertical direction and the horizontal direction and a plurality of small absorption portions formed by partitioning by the groove portion are arranged. The absorbent article according to any one of claims 1 to 7, wherein the small absorbent portion has a basis weight higher than a basis weight of the groove portion. In plan view of the absorbent core, the shape of the first region and the shape of the second region are asymmetric with respect to the bisector of the absorbent article extending in the lateral direction,
The shape of a pair of said front pressing groove and the shape of a pair of said back pressing groove are asymmetric with respect to the said bisector, when the said absorbent article is planarly viewed. The absorbent article of Claim 1.   The linear compression groove has a front lateral compression groove extending in the lateral direction in the front area and a rear lateral compression groove extending in the lateral direction in the rear area. Absorbent article as described in 1. Each of the front lateral squeezing groove and the rear lateral squeezing groove has a convex curved shape outward in the longitudinal direction,
The linear pressing groove has the front lateral pressing groove arranged between a pair of the front pressing grooves, and an end of the front lateral pressing groove and an end of the front pressing groove are connected to each other, and the pair of the rear pressing grooves The rear lateral pressing groove is arranged between the grooves, and the end of the rear lateral pressing groove and the end of the rear pressing groove are connected,
The middle-high portion extends in the longitudinal direction according to both side edges extending in the longitudinal direction of the absorbent core in a plan view of the absorbent core and extending in the transverse direction perpendicular to the longitudinal direction of the absorbent core. A middle high section extending to a predetermined length, one front convex section projecting from the front end in the vertical direction of the middle high section toward the first region, and the vertical direction of the middle high section A rear-side convex portion that is convex from the rear end portion toward the second region side,
When the absorbent article is viewed in plan, the top portion of the front lateral squeezing groove that draws a convex curve toward the outside in the vertical direction is arranged at a position corresponding to the top portion of the front side convex portion of the absorbent core. Or the top of the rear lateral squeezing groove that draws a convex curve toward the outside in the longitudinal direction is arranged at a position corresponding to the top of the rear side convex portion of the absorbent core, The absorbent article according to claim 10. The absorbent article comprises a pair of wings extending outward from the left and right sides along the longitudinal direction,
Inside the region sandwiched between the base along the longitudinal direction of one of the wing portions and the root along the longitudinal direction of the other wing portion, the middle high portion and the portion other than the middle high portion of the absorbent core The intersection of the boundary part and the pair of front pressing grooves and at least one of the intersection of the boundary part and the pair of rear pressing grooves are arranged. The absorbent article according to any one of the above.

Images