TWI758380B - absorbent articles - Google Patents

Abstract

The absorbent article (1) comprises an absorbent core (41). The absorptive core (41) has a protrusion (42) protruding toward the non-skin side sheet (3) in the excretion opposing region (B). The thickness of the protrusion (42) is thicker than the thickness of the 1st area|region (41F) and the 2nd area|region (41R) of the absorptive core (41). When viewed from above, the protruding portion (42) has a maximum width portion with the largest length in the transverse direction (Y) perpendicular to the longitudinal direction (X) of the absorptive core (41), and the length of the transverse direction (Y) of the maximum width portion is related to the absorption The length of the transverse direction (Y) of the core (41) is the same.

Description

absorbent articles

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

Conventionally, in absorbent articles such as sanitary napkins and disposable diapers, when a large amount of body fluid is excreted, fluid leakage sometimes occurs during daily activities. Therefore, in the absorbent core of the absorbent article, the absorption of bodily fluids in a wide range is proposed by providing a middle and high portion with a large basis weight in the central portion (for example, Patent Documents 1 to 2).

Patent Document 1 describes an absorbent article in which, in the absorbent core of the absorbent article, a central portion having a height and density higher than other portions is provided in the central region, and the central portion is arranged so as to be close to the absorbent core. The transverse width (width) of the core is equal.

In addition, Patent Document 2 describes an absorbent article in which the absorber of the absorbent article includes an upper absorbing part and a lower absorbing part in a laminated state, and the width of the upper absorbing part and the width of the lower absorbing part are the same size.

In addition, as another technique different from these techniques, the present applicant has previously proposed an absorbent article having a widthwise gap in the excretion portion opposing portion of the absorbent core from the viewpoint of improving the conformability to the body shape. The absorber in which the center region protrudes toward the non-skin side sheet (Patent Document 3).

prior art literature Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 61-602

Patent Document 2: Japanese Patent Laid-Open No. 2012-81246

Patent Document 3: Japanese Patent Laid-Open No. 2016-86872

The present invention relates to an absorbent article comprising: an absorbent body comprising an absorbent core having a shape long in the longitudinal direction corresponding to the front-rear direction of the wearer; a skin side sheet covering the absorbent body a skin-opposite surface; and a non-skin-opposite surface, which covers the non-skin-opposite surface of the absorbent body, and the absorbent article has a front region and a rear region. The absorptive core has an intermediate region between the first region located on the front region side and the second region located on the rear region side, and the intermediate region includes protrusions thicker than the first region and the second region. department. The said protrusion part protrudes to the said non-skin side sheet, and the skin opposing surface is formed in a flat shape. When the said absorptive core is planarly viewed, the said protruding part has the largest width part whose length is the largest in the transverse direction orthogonal to the said longitudinal direction of the said absorptive core, and the length of the transverse direction of the said maximum width part is the same as that of the said transverse direction of the said absorptive core. same length.

1: sanitary napkin

1S: Flank

1W: Wing

2: Skin side piece

3: Non-skin side piece

4: Absorber

5: Side pieces

6: Joint

7: Linear compression groove

41: Absorbent core

41F: The first area

41R: Second area

41M: Middle area

41s: side edge

42: Protrusions

43: Boundary groove

43a: Front protruding boundary groove

43c: Rear protruding boundary groove

44: Protruding abutment

44a: Front protruding abutment

44c: Rear protruding abutment

45: Groove

45X: Longitudinal slot

45Y: Horizontal groove

46: Small absorption part

54: Fiber tube

55: Recess for stacking

56: Bottom

56b: Recess

57: The first airtight part

58: Second difficult ventilation part

71: The first transverse compression groove

72: Second transverse compression groove

73: Longitudinal compression groove

73A: Second longitudinal compression groove

421: Protruding central part

422: Front side convex part

422s: side

422t: top

423: Rear side protrusion

423s: side

423t: top

A: Front area

B: Excretion relative area

C: rear area

CL: Centerline

d: width

K: space

L1: full length

L2: full length

L3: full length

L4: full length

R: direction

RS: continuous layer

T1: Thickness

T2: Thickness

X: Portrait

Y: horizontal

Fig. 1 is a plan view showing the skin-opposing surface side (skin side sheet side) of a sanitary napkin which is a preferred embodiment of the absorbent article of the present invention.

Fig. 2 is a plan view of the non-skin-opposite side of the absorbent core of the sanitary napkin shown in Fig. 1 .

FIG. 3 is a cross-sectional view schematically showing the III-III section of FIG. 2 .

FIG. 4 is a cross-sectional view schematically showing the IV-IV section of FIG. 1 .

FIG. 5 is a cross-sectional view schematically showing the V-V section of FIG. 1 .

Fig. 6(a) and Fig. 6(b) are explanatory diagrams for explaining the manufacturing steps of the absorbent core included in the sanitary napkin shown in Fig. 1 .

Fig. 7 is a plan view showing the skin-facing surface side (skin side sheet side) of a sanitary napkin as another preferred embodiment of the absorbent article of the present invention.

Fig. 8 is a plan view showing the skin-facing surface side (skin side sheet side) of a sanitary napkin as another preferred embodiment of the absorbent article of the present invention.

Patent Documents 1 to 2 disclose a technique of increasing the amount of absorption by utilizing a middle-high portion with a large basis weight arranged in the central portion of the absorbent core, but nothing is made about making it protrude to the non-skin side sheet. It is described that in the absorbent articles described in Patent Documents 1 to 2, a gap is formed between the step of the middle and high part and the surface sheet, and there is a concern that leakage due to the fact that the discharged liquid cannot be rapidly diffused in the absorber, or that the middle and high heights may leak. Part of the level difference causes the wearer to feel uncomfortable. Moreover, in patent document 3, in the excretion part opposing part of an absorptive core, the absorbent article which made the center protrusion part protrude toward the non-skin side sheet is described. The absorbent article described in Patent Document 3 improves the fit when wearing, but the center protrusion is not formed over the entire width of the absorbent core, and there is a fear that the center protrusion and the excretion part may occur during wearing or use. Liquid leaks when the position is shifted.

Therefore, the subject of this invention is to provide the absorbent article which can eliminate the above-mentioned disadvantages of the prior art.

Hereinafter, the absorbent article of the present invention will be described with reference to the accompanying drawings based on the sanitary napkin 1 (hereinafter also referred to as "sanitary napkin 1") which is a preferred embodiment of the absorbent article of the present invention. In FIG. 1, the top view which looked at the sanitary napkin 1 of this embodiment from the skin side sheet 2 side is shown. As shown in FIG. 1 , the sanitary napkin 1 includes: an absorber 4 including an absorptive core 41 having a long shape in the longitudinal direction X corresponding to the front-rear direction of the wearer; Sheet 2; and non-skin side sheet 3 covering the non-skin-opposite side of absorber 4, sanitary napkin 1 having a front area Domain A and rear area C. As shown in FIG. 1 , the sanitary napkin 1 is divided into an excretion opposing region B arranged opposite to the wearer's liquid excretion portion, and a front region A and a rear region C arranged before and after the longitudinal direction X of the excretion opposing region B.

In this specification, the longitudinal direction X corresponds to the front and rear direction of the wearer, and corresponds to the longitudinal direction of the absorbent article (sanitary napkin 1), and the transverse direction Y corresponds to the width direction of the absorbent article (sanitary napkin 1) (the direction perpendicular to the longitudinal direction). direction) are the same. Therefore, unless otherwise specified, in this specification, the length in the vertical direction X refers to the "length" as the distance measured in the vertical direction X, and the length in the horizontal direction Y refers to the "width" as the distance measured in the horizontal direction Y. . The sanitary napkin 1 is formed to be bilaterally symmetrical with respect to the center line CL extending in the longitudinal direction X. The longitudinal direction X is the direction parallel to the center line CL. In addition, in this specification, the skin-facing surface is the surface of the absorbent article (sanitary napkin 1) or its constituent parts that faces the wearer's skin side when the absorbent article (sanitary napkin 1) is worn, and the non-skin-facing surface is absorbent The surface of the sexual article (sanitary napkin 1 ) or its constituent members that faces the opposite side (the clothing side) to the skin side when the absorbent article (sanitary napkin 1 ) is worn.

The sanitary napkin 1 has an excretion opposing region B that is arranged to face the wearer's liquid excretion portion (vaginal opening, etc.) when worn, and a front region A that is arranged on the wearer's abdomen (front side) rather than the excretion opposing region B. In the rear area C of the wearer's back side (rear side) rather than the excretion opposing area B. That is, the sanitary napkin 1 is divided into the front area A, the excretion opposing area B, and the rear area C in this order in the longitudinal direction X. As shown in FIG.

In addition, in the absorbent article of the present invention, in the case where the sanitary napkin 1 of the present embodiment generally has the wings 1W, the excretion opposing region B refers to the region having the wings 1W in the longitudinal direction X (nipped between one side). The area between the root of the wing portion 1W along the longitudinal direction X and the root of the wing portion 1W on the other side along the longitudinal direction X). In addition, in the case of an absorbent article that does not have the wing portion 1W, the excretion opposing region B refers to the horizontal direction generated when the absorbent article is folded in a single package form of three folds. The area surrounded by the first and second fold lines from the front end in the longitudinal direction X of the absorbent article among the two fold lines (not shown) that traverse the absorbent article in the Y direction.

As shown in FIG. 1 , the sanitary napkin 1 of this embodiment has a skin side sheet 2 that forms a liquid-permeable surface opposite to the skin, a non-skin side sheet 3 that forms a non-skin opposite surface, and the two sheets 2 and 3 interposed therebetween. Absorber 4 in between. The absorber 4 is composed of an absorptive core 41 and a core wrap (not shown) that wraps the absorptive core 41 .

In the sanitary napkin 1 , as shown in FIG. 1 , the skin side sheet 2 covers the entire area of the skin-opposing surface of the absorber 4 and extends from both side edges of the absorber 4 along the longitudinal direction X to the outer side of the lateral direction Y. On the other hand, the non-skin side sheet 3 covers the entire area of the non-skin-opposed surface of the absorber 4, and further extends from the both side edges of the skin side sheet 2 along the longitudinal direction X to the outer side of the transverse direction Y, and the following side The sheets 5 together form the side flaps 1S. The non-skin side sheet 3 and the side sheet 5 are joined to each other by a well-known joining method such as adhesive, heat sealing, ultrasonic sealing, etc. at the extending portion from both edges of the absorber 4 along the longitudinal direction X. Moreover, between the skin side sheet 2 and the non-skin side sheet 3, and the absorber 4, respectively, you may join with an adhesive agent.

In the sanitary napkin 1, as shown in FIG. 1, the side sheet 5 is arrange|positioned at the two side parts along the longitudinal direction X among the skin-opposing surfaces of the skin side sheet 2. It is preferable that the side sheet 5 is arrange|positioned over the whole length of the vertical direction X of the skin side sheet 2 so that it may overlap with the left and right both sides of the skin side sheet 2 along the vertical direction X in a plan view.

In the sanitary napkin 1, as shown in FIG. 1, a pair of side sheets 5 and 5 are each joined to the skin side sheet 2 at the joining part 6. A pair of wavy joints 6 in which the concavities and convexities in the lateral direction Y formed by the curve are alternately arranged continuously in the longitudinal direction X are arranged symmetrically in the lateral direction Y with the center line CL as the center in plan view. In this way, when the side sheet 5 is joined and fixed to the skin side sheet 2 at the corrugated joint portion 6, the side sheet 5 and the side sheet 5 are formed at a position on the inner side of the transverse direction Y from the joint portion group of the corrugated joint portion 6. The space part divided by the skin side panel 2 . This space portion is open to the center line CL, and therefore, from the lateral direction Y Bodily fluids such as menstrual blood flowing from the center to the outside are accommodated in the space portion, and as a result, leakage of the bodily fluids can be effectively prevented.

In the sanitary napkin 1 , as shown in FIG. 1 , the side flaps 1S are largely protruded to the outside of the lateral direction Y in the excretion opposing region B, so that a pair of flaps are provided on the left and right sides along the longitudinal direction X of the sanitary napkin 1 . 1W, 1W. The wings 1W are folded back to the non-skin-opposite side of the crotch of clothing such as shorts. In addition, as shown in FIG. 1, the skin side sheet 2 and the non-skin side sheet 3 are respectively extended from the front end and rear end of the longitudinal direction X of the absorber 4 to the outer side of the longitudinal direction X, and these extension parts are made of adhesive and heat-sealed. The end seals are formed by bonding with each other by known bonding methods such as bonding and ultrasonic sealing.

In the sanitary napkin 1, as shown in FIG. 1, the linear compression groove 7 formed by the skin-side sheet 2 and the absorber 4 integrally recessed toward the non-skin-side sheet 3 side is formed in the skin-opposing surface of the skin-side sheet 2. The so-called "linear" in the linear compression grooves 7 is not limited to the shape of the grooves (recesses) being straight lines in plan view, but also includes curved lines. Wherein, each line can be either a continuous line or a general discontinuous line such as a dotted line. In the sanitary napkin 1, the linear compression grooves 7 are constituted by rows of discontinuous point embossing. In the linear compression grooves 7 , the density of each fiber constituting the skin side sheet 2 and the absorber 4 is higher than the density of the peripheral portion of the linear compression grooves 7 . The linear compression grooves 7 have first lateral compression grooves 71 extending in the lateral direction Y in the front region A and the rear region C of the absorber 4, respectively, and on both sides along the longitudinal direction X of the excretion opposing region B of the absorber 4 There is a longitudinal compression groove 73 extending in the longitudinal direction X. In the sanitary napkin 1, the first lateral compression grooves 71 are curved lines that protrude outward in the longitudinal direction X, and the longitudinal compression grooves 73 are curved lines that protrude outward in the transverse direction Y in the excretion opposing region B. The first lateral compression grooves 71 extend in the lateral direction Y across the pair of vertical compression grooves 73 inside the pair of vertical compression grooves 73 . In the sanitary napkin 1, the first horizontal compression groove 71 in the front area A, the vertical compression groove 73 on one side, the first horizontal compression groove 71 in the rear area C, and the vertical compression groove 73 on the other side are connected to form a ring. Circumferential groove. The linear compression grooves 7 thus formed can suppress the diffusion of bodily fluids in the plane direction of the absorber 4, and further Effectively prevent the liquid from leaking from the surrounding area of the sanitary napkin 1 .

In the sanitary napkin 1, as shown in FIG. 2, the absorptive core 41 constituting the absorber 4 has a middle between the first region 41F located on the front region A side in the longitudinal direction X and the second region 41R located on the rear region C side Area 41M. The intermediate region 41M includes the protruding portion 42 thicker than the thickness of the first region 41F and the second region 41R. In the sanitary napkin 1, the middle region 41M is arranged in the region of the excretion opposing region B. The middle region 41M of the absorptive core 41 and the excretion opposing region B of the sanitary napkin 1 may or may not be consistent with each other in the longitudinal direction. In the sanitary napkin 1, the intermediate region 41M having the protrusion 42 extends not only in the excretion opposing region B, but also extends from the excretion opposing region B to a part of the front region A and a part of the rear region C in the longitudinal direction. Furthermore, in the sanitary napkin 1, as shown in FIG. 2 in plan view, the first region 41F of the absorptive core 41 is arranged in the region of the front region A of the sanitary napkin 1, and in the region of the rear region C of the sanitary napkin 1 The 2nd area|region 41R of the absorptive core 41 is arrange|positioned.

In the sanitary napkin 1 , as shown in FIG. 1 , the absorbent core 41 has a shape long in the same direction as the longitudinal direction X of the sanitary napkin 1 . Therefore, the longitudinal direction of the absorptive core 41 is the same direction as the longitudinal direction X of the sanitary napkin 1 , and the transverse direction of the absorptive core 41 is the same direction as the transverse direction Y of the sanitary napkin 1 .

As shown in FIGS. 3 to 5 , the protruding portion 42 having the intermediate region 41M protrudes toward the non-skin side sheet 3 , and in the sanitary napkin 1 , the skin opposing surface is formed in a flat shape. As shown in FIG. 4 , the thickness of the protruding portion 42 is formed to be thicker than the thickness of the first region 41F located in front of the intermediate region 41M and the thickness of the second region 41R located behind the intermediate region 41M. Preferably, in the sanitary napkin 1, the protrusions 42 are formed to be thicker than the thickness of the first region 41F in the absorptive core 41 and have a higher basis weight than the basis weight of the first region 41F in the absorptive core 41. . Moreover, in the sanitary napkin 1, the thickness of the protrusion 42 is formed to be thicker than the thickness of the second region 41R in the absorptive core 41, and the basis weight is formed to be larger than the basis weight of the second region 41R in the absorptive core 41 high. The thickness and basis weight of each of the first region 41F and the second region 41R compared with the thickness and basis weight of the protrusion 42 mean that in the first region When the grooves 45 described below are formed in the 41F and the second region 41R, the thickness and basis weight of the portion where the grooves 45 described below are not present in the first region 41F and the second region 41R. The absorbent core 41 of the sanitary napkin 1 is provided with a difference in thickness due to the difference in the basis weight of the core material. Therefore, unlike the case where a part of the absorbent core with a uniform basis weight is partially compressed to provide a difference in thickness, the absorbent core 41 as a whole has a difference in thickness. soft.

As described above, the skin-opposing surface of the protruding portion 42 is formed in a flat shape. Here, "the skin-opposing surface is flat" means not only that the skin-opposing surface of the protruding portion 42 of the absorptive core 41 on the skin side sheet 2 side is in a completely flat state, but also includes the accumulation due to the position at the time of fiber accumulation. A state in which unevenness of about 5mm in width and about 2mm in depth is formed on a part of the surface opposite to the skin due to variation in fineness, deformation during pressurization, and other manufacturing steps. Thereby, in the sanitary napkin 1, the protrusion part 42 becomes the form which does not have the recessed part whose basis weight is lower than the basis weight of the 1st area|region 41F and 2nd area|region 41R in the absorptive core 41 on the skin-opposing surface side. Here, when the first region 41F and the second region 41R have the groove portion 45 , the basis weight of the first region 41F and the second region 41R refers to the basis weight of the portion other than the groove portion 45 . If there is a concave part with a low basis weight on the side of the protruding part 42 opposite to the skin, it will not only hinder the rapid spread of the excretory fluid to the horizontal direction in the longitudinal and transverse directions, but also easily cause the liquid to return due to the reduction of the absorption amount or the absorption speed of the liquid. , and more prone to unexpected wrinkles or breaks in the sanitary napkin 1. Assuming that there is a concave portion having a low basis weight on the skin-opposing surface of the protruding portion 42 as a longitudinal groove portion of the protruding portion 42 in the longitudinal direction X, it is conceivable that the protruding portion 42 is easily cut in the lateral direction Y by the longitudinal groove. Wrinkling in the longitudinal direction of the sanitary napkin 1 is more likely to occur during wearing, starting from the longitudinal groove portion, and the absorbent core may be cut by the action of the wearer of the sanitary napkin 1 based on the longitudinal groove portion. Case. When the absorptive core is cut in this way, a gap is likely to be formed between the sanitary napkin 1 and the body, and the absorption capacity is remarkably lowered, which is a cause of so-called liquid leakage. Further, the linear compression grooves 7 are formed by integrally denting the skin side sheet 2 and the absorber 4 to the non-skin side sheet 3 side in the subsequent manufacturing process by the absorptive core 41 having a flat surface opposite to the skin. Liquid leakage is likely to occur.

In the sanitary napkin 1, as shown in FIG. 4, the absorptive core 41 has a continuous layer RS of uniform thickness from the first region 41F through the intermediate region 41M to the second region 41R on the skin-opposing surface. The continuous layer RS is formed on the front surface of the skin-opposing surface of the absorptive core 41 in the sanitary napkin 1 . The thickness of the continuous layer RS is the same as the thickness of the absorptive core 41 at the protruding boundary groove portion 43 described below or the thickness of the absorptive core 41 at the protruding boundary groove portion 43 .

From the viewpoint of securing the liquid absorption amount of the absorbent core 41 by protruding the protruding portion 42 toward the non-skin side sheet 3 which is the non-skin side of the wearer, the thickness of the protruding portion 42 is preferably the second in the absorptive core 41. The thickness of the first region 41F and the second region 41R is 120% (ie, 1.2 times) or more, more preferably 140% or more, in addition, preferably 700% or less, more preferably 500% or less. From the viewpoint of followability and suppression of discomfort, it is preferably 120% or more and 700% or less, more preferably 140% or more and 500% or less. In addition, the protrusion height expressed by the thickness difference (the former - the latter) between the thickness of the protrusion 42 and the thickness of the first region 41F or the second region 41R is preferably 1.0 mm or more, more preferably 2.0 mm or more, and preferably It is 8.0 mm or less, more preferably 6.0 mm or less, and more preferably 1.0 mm or more and 8.0 mm or less, more preferably 2.0 mm or more and 6.0 mm or less. The above-described structure is particularly effective when the protruding portion 42 like the sanitary napkin 1 of the present embodiment is provided in the excretion opposing region B.

In addition, the thickness of the protruding portion 42 is preferably 2.0 mm or more, more preferably 3.0 mm or more, more preferably 10.0 mm or less, more preferably 7.0 mm or less, and more preferably 2.0 mm or more and 10.0 mm or less, more preferably It is 3.0 mm or more and 7.0 mm or less. In addition, it is preferable that the above-mentioned relationship of thicknesses exists in the whole range of the protrusion part 42, but when the thickness increase and decrease of the protrusion part 42 is provided in the thickness direction, the said relationship should just be in the thickest part.

In addition, it is preferable that the above-mentioned thickness relationship is in the entire range of the protruding portion 42, but in the protruding portion In the thickness direction of 42, when there is a gradual increase or decrease in thickness in the transverse direction Y or the longitudinal direction X or both directions, the above relationship is sufficient at the thickest part.

In addition, 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, more preferably 7.0 mm or less, more preferably 3.5 mm or less, and more preferably 0.5 mm It is more than 7.0 mm, and it is more preferable that it is 1.0 mm or more and 3.5 mm or less.

In the sanitary napkin 1, it is preferable that the thickness of the first region 41F or the second region 41R is formed substantially uniformly in the portion where the groove portion 45 described below does not exist, but the thickness of the first region 41F or the second region 41R in the lateral direction Y or When there is a gradual increase or decrease in thickness in the longitudinal direction X, the above relationship is sufficient at the thickest part.

The thickness of each part of the absorptive core 41, such as the protrusion part 42, the 1st area|region 41F or the 2nd area|region 41R, the following protrusion adjoining part 44, is measured by the following method.

<Measurement method of thickness of each part of absorbent core 41>

The absorptive core is left still in a horizontal place without wrinkling and bending, and the protrusion 42 , the first region 41F, the second region 41R, etc. are cut out from the absorptive core 41 as a measurement object. Next, the thickness of the cut-out measurement object under a load of 5 cN/cm ² was measured. Specifically, for thickness measurement, for example, a thickness gauge PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.) is used. At this time, a circular or square plate (acrylic plate with a thickness of about 5 mm) adjusted so that the load is 5 cN/cm ² is placed between the front end of the thickness gauge and the cut-out measurement object. , to measure the thickness. When measuring the thickness of the 1st area|region 41F, the 2nd area|region 41R etc. in the absorptive core 41, it measures in the state which does not contain the following groove part 45.

In the sanitary napkin 1, from the viewpoint of securing the liquid absorption capacity of the absorbent core 41 by protruding the protruding portion 42 toward the non-skin side sheet 3 which is the non-skin side of the wearer, the base of the protruding portion 42 in the absorbent core 41 is The weight is preferably 100 g/m ² or more, more preferably 200 g/m ² or more, and preferably 1500 g/m ² or less, more preferably 1200 g/m ² or less, specifically, preferably 100 g/m ² More than 1500 g/m ² or less, more preferably 200 g/m ² or more and 1200 g/m ² or less. In addition, the basis weight of the first region 41F or the basis weight of 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 more preferably 1000 g/m ² Hereinafter, it is 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 obtained by using the cut-out protrusions described in the above-mentioned measuring method for measuring the thickness of each part of the absorbent core 41 42. The mass of the sample in the first area 41F or the second area 41R is divided by the area of the surface on the opposite side of the skin of the sample. When measuring the basis weight of the first region 41F or the basis weight of the second region 41R in the absorptive core 41, the measurement is performed in a state in which the following groove portion 45 is not included.

In the sanitary napkin 1, when the absorptive core 41 is viewed in plan, the protruding portion 42 has a maximum width portion having the longest length in the transverse direction Y perpendicular to the longitudinal direction X of the absorptive core 41, and the length of the transverse direction Y of the maximum width portion is related to the absorbency The lengths in the transverse direction Y of the core 41 are the same. Preferably, when the absorptive core 41 is viewed in plan as shown in FIG. 2 , the protrusions 42 include the largest width of the protrusions 42 and are formed by extending a specific length in the longitudinal direction X along both side edges of the absorptive core 41 along the longitudinal direction X. The protruding central portion 421. In other words, the protruding center portion 421 extends in a strip shape between both side edges 41s and 41s of the absorptive core 41 along the longitudinal direction X, and has the above-mentioned protruding portion 42 over the entire length of the longitudinal direction X of the strip-shaped protruding center portion 421 . maximum width. The length of the lateral direction Y of the largest width part of the protruding center part 421 is the same as the largest width of the absorptive core 41 in the intermediate region 41M. In addition, the width of the absorptive core 41 here means the width|variety of the absorptive core 41 including the protrusion part 42. That is, when the cross-section of the protruding portion 42 in the lateral direction Y is observed, the width of the protruding portion 42 on the non-skin-opposing surface side is closer to the height position of the surfaces on the non-skin-opposing surface side of the adjacent first region 41F and the second region 41R. (Non-skin side width), the same as the width of the skin When the width (skin side width) of the protrusion 42 on the opposite side is the same or the non-skin side width is large, the maximum width of the protrusion 42 is the same as the width of the absorptive core 41 . However, the maximum width portion of the protruding portion 42 is preferably approximately the same in the width on the skin side and the width on the non-skin side, and particularly preferably approximately uniform in the thickness direction.

In the sanitary napkin 1, as shown in FIG. 2, in order to ensure a sufficient amount of absorption even when the absorbent article is worn in a slightly shifted state, the absorbent core 41 is preferably disposed in the excretion opposing region with the protruding center portion 421 B, and make the area as wide as possible in the area of the excretion opposite area B. From such a viewpoint, the protruding center portion 421 is preferably at the maximum width portion, and the distance between the both side edges 41s and 41s along the longitudinal direction X of the absorbent core 41 is constant, and it is more preferable that the both side edges 41s and 41s are located on each other. The longitudinal direction X is parallel and formed in a linear shape. However, at the time of manufacture, the protruding part 42 may be protruded due to positional deviation of the lateral direction Y of the protruding part 42 in the absorbent core 41, notch of the protruding part 42, inclination of the mold release due to the production method, rounding or chamfering of the end part, etc. The width of the part 42 and the width of the absorptive core 41 are slightly different to some extent, for example, within the range of the difference of about 5% of the width of the largest width part, it is regarded as the same width. The maximum width refers to the distance from the longest position in the horizontal direction Y. In addition, in the sanitary napkin 1, the length in the transverse direction Y of the maximum width portion of the protrusion 42 in the transverse direction Y is the same as the maximum length in the transverse direction Y of the intermediate region 41M of the absorbent core 41, and is the same as the transverse direction Y of the absorbent core 41. The maximum length is the same. Therefore, even if the sanitary napkin 1 is worn in a slightly shifted state, a sufficient amount of absorption can still be ensured, and leakage is less likely to occur.

In the sanitary napkin 1, when viewed in cross section as shown in FIG. 3, the protruding center portion 421 of the protruding portion 42 is formed so that the thickness thereof decreases from the center portion in the lateral direction Y to the both side edge portions along the longitudinal direction X. That is, among the protruding center portions 421, the center portion on the center line CL extending in the longitudinal direction X is formed to have the largest thickness. When the protruding center portion 421 is formed in this way, the absorption amount of the liquid in the excretion opposing region B can be sufficiently ensured.

In the sanitary napkin 1, when viewed in cross section as shown in FIG. 3, the protruding center portion 421 of the protruding portion 42 is formed so that its basis weight decreases from the center portion in the horizontal direction Y to the both side edge portions along the vertical direction X. That is, the center part arrange|positioned on the center line CL extended in the vertical direction X among the protruding center parts 421 is formed so that the basis weight is the largest. When the protruding center portion 421 is formed in this way, the absorbency of the liquid in the excretion opposing region B and the like can be improved.

In the protruding center portion 421 of the sanitary napkin 1, when the cross section is viewed as shown in FIG. 3, the ratio (T1) of the thickness (T1) of the center portion arranged on the center line CL to the thickness (T2) of the side edge 41s where the thickness is the smallest /T2), from the viewpoint that the protruding portion can be in close contact with the excretory portion without gaps as much as possible, preferably 1.1 or more, particularly preferably 1.3 or more, and from the viewpoint of not easily causing discomfort during wearing, It is preferably 4 or less, particularly preferably 3 or less, specifically, preferably 1.1 or more and 4 or less, particularly preferably 1.3 or more and 3 or less.

In addition, the protruding portion 42 includes a front-side protruding portion 422 or a rear-side protruding portion 423 , and the front-side protruding portion 422 or the rear-side protruding portion 423 is formed so that the length of the lateral direction Y becomes narrower than the above-mentioned maximum width portion of the protruding portion 42 . The protruding center portion 421 protrudes toward the front area A side or the rear area C side. In other words, when the absorptive core 41 is viewed in plan as shown in FIG. 2 , the protruding portion 42 has at least a front side protruding portion 422 and a protruding central portion 421 protruding from the front end portion of the protruding center portion 421 in the longitudinal direction X to the first region 41F side. The rear end portion of the longitudinal direction X protrudes toward the second region 41R side of the rear side convex portion 423. In the sanitary napkin 1, the protruding portion 42 has a front side convex portion 422 and a rear side convex portion 423. That is, in the sanitary napkin 1, the protrusion part 42 is divided into the front side convex part 422, the protrusion center part 421, and the rear side convex part 423.

In the sanitary napkin 1 , as shown in FIG. 2 , in the absorptive core 41 , one front side convex portion 422 is arranged at the front end portion of the protruding central portion 421 , and one rear side convex portion 423 is arranged at the rear end portion of the projecting central portion 421 . There is one. In the front side convex part 422, the top part 422t of the front side convex part 422 is arrange|positioned in the vertical direction On the center line CL extending in the X direction, both sides 422s and 422s forming the front side convex portion 422 extend in a linear shape from the top 422t to the side edge 41s along the longitudinal direction X of the absorptive core 41, respectively. The rear side convex portion 423 is the same as the front side convex portion 422. The top portion 423t of the rear side convex portion 423 is arranged on the center line CL extending in the longitudinal direction X, and the two sides 423s and 423s of the rear side convex portion 423 are formed from the top respectively. 423t extends to the side edge 41s along the longitudinal direction X of the absorbent core 41 .

In the sanitary napkin 1 , as shown in FIG. 2 , the front side convex portion 422 and the rear side convex portion 423 of the absorbent core 41 are respectively formed so as to be located at the top of the central portion in the transverse direction Y from both sides along the longitudinal direction X, respectively. 422t, 423t with decreasing width d. Preferably, in the absorbent core 41 of the sanitary napkin 1, the front side convex portion 422, the interval (width d) between the side edges 422s, 422s is from the side edges 41s, 41s of the absorbent core 41 along the longitudinal direction X Descending towards the top 422t. Similarly, in the rear side convex portion 423 of the absorbent core 41 of the sanitary napkin 1, the interval (width d) between the two side edges 423s, 423s is from the side edges 41s, 41s of the absorbent core 41 along the longitudinal direction X to the direction The top 423t is decreasing. Here, the decreasing width d means that the width d continuously decreases gradually toward the tops 422t and 423t.

Regarding the absorptive core 41 in the sanitary napkin 1, when the front-side convex portion 422 of the front-side convex portion 422 and the rear-side convex portion 423 is described as an example, as shown in FIG. Extend straight without bending. From the viewpoint of improving the fit to the body shape and the followability during movement, the angle α formed by the side 422s on one side and the center line CL extending in the longitudinal direction X is preferably 20° or more, more preferably 30° or more, and preferably 75° or less, more preferably 60° or less, specifically, 20° or more and 75° or less, and more preferably 30° or more and 60° or less. The rear side convex portion 423 is also the same as the front side convex portion 422 .

From the viewpoint of ensuring both the absorption of bodily fluids and the fit of the sanitary napkin 1 when worn, as shown in FIG. 25% or more, more preferably 30% or more, and more preferably 80% or less, more preferably 75% or more Furthermore, it is preferably 25% or more and 80% or less, and more preferably 30% or more and 75% or less.

In addition, the full length L1 shows the distance of the longest position in the longitudinal direction X of the absorptive core 41, and the full length L2 shows the distance of the longest position in the longitudinal direction X of the protrusion 42.

From the viewpoint of sufficiently securing the absorption of body fluids, as shown in FIG. 2 , the total length L3 of the longitudinal direction X of the protruding center portion 421 of the protruding portion 42 is preferably 20% or more of the total length L2 of the protruding portion 42 , more preferably 30%. % or more, and preferably 80% or less, more preferably 70% or less, and also preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less.

As shown in FIG. 2 , the total length L4 of the longitudinal direction X of the front side convex portion 422 constituting the protruding portion 42 is preferably 5% or more of the total length L2 of the protruding portion 42, more preferably 10% or more, and preferably 50% Hereinafter, 30% or less is more preferable, and 5% or more and 50% or less are more preferable, and 10% or more and 30% or less are more preferable. The total length of the longitudinal direction X of the rear side convex portion 423 constituting the protruding portion 42 is also the same as the total length L4 of the longitudinal direction X of the front side convex portion 422 .

Here, the full length L4 refers to the distance of the longest position of the front-side convex portion 422 in the longitudinal direction X. As shown in FIG.

In the sanitary napkin 1, as shown in FIG.2, FIG.4 and FIG.5, the absorptive core 41 has the protrusion boundary groove part 43 which divides the boundary between the protrusion part 42 and the part other than the protrusion part 42 in the intermediate area 41M. The protruding boundary groove portion 43 is formed so as to be recessed toward the skin-opposing surface side from the non-skin-opposing surface side in the absorptive core 41 . The protruding boundary groove portion 43 is formed so as to be recessed protrudingly from the non-skin on the non-skin side sheet 3 side in the absorbent core 41 facing the skin side sheet 2 side, and the top of the cavity as a groove is formed on the skin side sheet 2 side. top. Therefore, when the sanitary napkin 1 is worn, the absorber 4 is easily bent from the protruding boundary groove portion 43 to the inner side of the lateral direction Y of the absorptive core 41 from the legs, and the sanitary napkin 1 is more likely to follow the body. The shape fits three-dimensionally.

In the sanitary napkin 1 , as shown in FIG. 2 , the protruding boundary groove portion 43 has a front protruding boundary groove portion 43 a along the front side convex portion 422 forming the protruding portion 42 . The two sides 422s, 422s extend; and the rear protruding boundary groove portion 43c extends along the two sides 423s, 423s forming the rear side convex portion 423. The front protruding boundary groove portion 43a and the rear protruding boundary groove portion 43c are formed over the entire length (entire width) of the lateral direction Y of the absorptive core 41 . Therefore, the force acting from the legs to the inner side of the transverse direction Y of the absorbent core 41 makes it difficult to produce longitudinal wrinkles in the longitudinal direction of the sanitary napkin 1, and the sanitary napkin 1 can be more easily fitted three-dimensionally along the shape of the body. Thereby, in the absorptive core 41, the boundary with the protrusion part 42 is demarcated by the front protrusion boundary groove part 43a and the rear protrusion boundary groove part 43c.

In the sanitary napkin 1, the groove width of the protruding boundary groove portion 43 in the absorptive core 41 is preferably 0.1 mm or more, more preferably 0.5 mm or more, from the viewpoint of improving the absorbency of liquid in the excretion opposing region B, etc. Moreover, 5.0 mm or less is preferable, 3.0 mm or less is more preferable, and 0.1 mm or more and 5.0 mm or less are preferable, and 0.5 mm or more and 3.0 mm or less are more preferable. In addition, the groove width and the following thickness of the protruding boundary groove portion 43 were measured by cutting it in a direction orthogonal to the extending direction of the protruding boundary groove portion 43 and measuring from the photograph of the cross section.

In the sanitary napkin 1, the thickness of the absorbent core 41 at the protruding boundary groove portion 43 (the thickness of the absorbent core 41 at the top of the groove) is preferable from the viewpoint of improving the absorbency of liquid in the excretion opposing region B, etc. It is 0.08 mm or more, more preferably 0.15 mm or more, and preferably 7.0 mm or less, more preferably 3.5 mm or less, and more preferably 0.08 mm or more and 7.0 mm or less, more preferably 0.15 mm or more and 3.5 mm the following.

In the sanitary napkin 1, the basis weight of the protruding boundary groove portion 43 is lower than that of the protruding portion 42, and the basis weight is lower than the basis weight of the first region 41F and the second region 41R in the absorbent core 41. Here, when the groove portion 45 described below is provided, the basis weight of the first region 41F and the basis weight of the second region 41R refer to the basis weight of the portion other than the groove portion 45 . The basis weight of the protruding boundary groove portion 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 basis weight of the protruding boundary groove portion 43 is obtained by using the portion of the protruding boundary groove portion 43 that is generally cut out as explained in the method for measuring the thickness of each part of the absorbent core 41 described above. The mass of the sample, divided by the area of the surface opposite the skin of the sample.

In the sanitary napkin 1 , as shown in FIG. 2 , the absorbent core 41 has the protruding abutment portion 44 in the region other than the protruding portion 42 and the protruding boundary groove portion 43 in the intermediate region 41M thereof. In the sanitary napkin 1 , the intermediate region 41M of the absorptive core 41 includes the protruding portion 42 , the protruding boundary groove portion 43 , and the protruding abutting portion 44 . In the intermediate region 41M, the protruding abutting portion 44 includes a front protruding abutting portion 44a disposed on the side of the first region 41F adjacent to the front-side convex portion 422 constituting the protruding portion 42, and a rear protruding abutting portion 44 c, the rear protruding abutting portion 44 c is arranged on the second region 41R side adjacent to the rear side convex portion 423 constituting the protruding portion 42 . The front protruding abutting portion 44a is formed to be bilaterally symmetrical with respect to the center line CL extending in the longitudinal direction X. As shown in FIG. The length of the longitudinal direction X is formed from the side edge 41s of the one side toward the center in the portion of the front protruding abutment portion 44a that is closer than the center line CL to the side edge 41s of the absorptive core 41 along one side in the longitudinal direction X. Line CL is decremented. The rear protruding abutting portion 44c is also formed to be bilaterally symmetrical with respect to the center line CL extending in the longitudinal direction X, similarly to the front protruding abutting portion 44a. The length of the longitudinal direction X is formed from the side edge 41s of the one side toward the center in the part of the half of the side edge 41s of the absorptive core 41 along one side in the longitudinal direction X of the rear protruding abutment part 44c rather than the center line CL. Line CL is decremented.

In the sanitary napkin 1 , as shown in FIGS. 4 and 5 , the protruding abutting portion 44 protrudes to the non-skin side than the top of the cavity in the protruding boundary groove portion 43 , in other words, than the top of the skin side sheet 2 in the protruding boundary groove 43 . Sheet 3 stands out. In addition, the skin-opposing surface of the protruding abutting portion 44 is formed to be flat. The thickness of the protruding abutting portion 44 is formed to be larger than the thickness of the protruding boundary groove portion 43 and smaller than the thickness of the protruding portion 42 in the absorptive core 41 . Further, from the point of view of the followability of physical activity, The thickness of the protruding abutment portion 44 is preferably the same as or smaller than 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 absorptive core 41 when it is repeatedly deformed by the movement of the body, the thickness of the protruding abutment portion 44 may be larger than the thickness of the first region 41F and the thickness of the second region 41R.

The thickness of the protruding abutting portion 44 is preferably 0.5 mm or more, more preferably 1.0 mm or more, and is preferably 10.0 mm or less, more preferably 7.0 mm or less, and is preferably 0.5 mm or more and 10.0 mm or less, more preferably Preferably it is 1.0 mm or more and 7.0 mm or less.

The thickness of the protruding abutment portion 44 is measured based on the above-described method of measuring the thickness of each portion of the absorbent core 41 .

In the sanitary napkin 1 , the basis weight (mass per unit area) of the protruding abutting portion 44 is formed to be smaller than the basis weight of the protruding portion 42 of the absorptive core 41 and larger than the basis of the protruding boundary groove portion 43 . Furthermore, it is preferable that the basis weight of the protruding adjoining part 44 is less than the basis weight of the 1st area|region 41F in the absorptive core 41 and the basis weight of the 2nd area|region 41R from a viewpoint of followability to physical activity. In addition, from the viewpoint of the strength of the absorptive core 41 when repeatedly deforming with respect to the movement of the body, the basis weight of the protruding abutting portion 44 may be larger than the basis weight of the first region 41F and the basis weight of the second region 41R. Here, when the groove portion 45 is provided, the basis weight of the first region 41F and the basis weight of the second region 41R refer to the basis weight of the portion other than the groove portion 45 . The basis weight of the protruding abutting 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, 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 basis weight of the protruding adjoining portion 44 is obtained by dividing the mass of the sample of the protruding adjoining portion 44 generally cut out as explained in the above-mentioned measuring method of the thickness of each part of the absorbent core 41 by The area of the surface of the sample on the opposite side of the skin.

In the sanitary napkin 1, as shown in FIG. 2, the first region 41F and the second region in the absorbent core 41 41R has a groove portion 45 with a relatively small basis weight and a small absorption portion 46 with a relatively large basis weight, respectively. Preferably, the groove portion 45 includes a vertical groove 45X extending in the longitudinal direction X and a lateral groove 45Y extending in the lateral direction Y. Thereby, the groove part (horizontal groove 45Y) extended in the horizontal direction Y is arrange|positioned in the 1st area|region 41F and the 2nd area|region 41R, and the groove part (vertical groove 45X) extended in the vertical direction X is arrange|positioned. The vertical grooves 45X extending in the vertical direction X are arranged at a predetermined interval in the horizontal direction Y, and the horizontal grooves 45Y extending in the horizontal direction Y are arranged at a predetermined interval in the vertical direction X. The small absorption part 46 is arrange|positioned at the position of the hole of the grid divided by the vertical groove|channel 45X and the horizontal groove|channel 45Y. The thickness and basis weight of the first region 41F and the second region 41R described above refer to the thickness and basis weight of the small absorption portion 46 . The basis weight of the groove part 45 including the vertical groove 45X and the horizontal groove 45Y is formed so that the basis weight ratio of the material forming the absorptive core is the small absorption part 46 of the part other than the groove part in the first region 41F and the second region 41R Low.

In the sanitary napkin 1, the absorptive core 41 has the groove part 45 and the small absorption part 46 in the 1st area|region 41F and the 2nd area|region 41R, and has the protrusion part 42, the protrusion boundary groove part 43, and the protrusion adjoining part 44 in the intermediate|middle area|region 41M , which is integrally formed. The so-called "integrated molding" means that components manufactured in different processes are combined with each other by bonding methods such as adhesives or compression, but are integrally formed in one process using the same material.

The absorptive core 41 of the sanitary napkin 1 can be generally manufactured by, for example, a fiber accumulation device as shown in FIG. 6( a ), and the fiber accumulation device includes a fiber accumulation cylinder 54 having a stacking concave portion 55 on the outer peripheral surface, And it rotates in one direction R; and a pipe (not shown) supplies the core material to the outer peripheral surface of the fiber stacking cylinder 54 in a scattered state.

A plurality of stacking recesses 55 are formed at regular intervals in the circumferential direction of the outer peripheral surface of the fiber stacking drum 54 . The bottom surface 56 of the concave portion 55 for stacking has a plurality of pores which are formed of a mesh plate or the like and function as suction holes.

In addition, as shown in FIG. 6( a ), a part of the bottom surface 56 of one stacking concave portion 55 is formed There is one recessed portion 56b for forming the intermediate region 41M of the absorptive core 41 . Moreover, in the recessed part 56b, the 1st gas-impermeable member 57 for forming the protrusion boundary groove part 43 which divides the protrusion part 42 and the protrusion adjoining part 44 is arrange|positioned at the bottom surface. The first air-impermeable member 57 is arranged at a position corresponding to the protruding boundary groove portion 43, and is fixed so as to protrude from the bottom surface of the recessed portion 56b. Moreover, the 2nd gas-impermeable member 58 for forming the groove part 45 is arrange|positioned at the bottom surface 56 of the upstream area|region and the downstream area|region of the rotation direction R adjacent to the recessed part 56b. The second air-impermeable member 58 is arranged at a position corresponding to the vertical groove 45X and the horizontal groove 45Y, and is fixed so as to protrude from the bottom surface 56 of the stacking recess 55 . The first impermeable member 57 and the second impermeable member 58 may be non-breathable members, including, for example, metals, plastics, ceramics, and the like.

Similar to the known fiber accumulating device including a fiber accumulating cylinder, the core material mixed with the water-absorbent polymer and the pulp fiber is fed into the pipe while being sucked from the bottom surface of the concave portion 55 for accumulation, as shown in FIG. 6(b) . As shown, the core material is accumulated in a predetermined shape in the accumulation recess 55 . The absorptive core 41 precursor is obtained by demolding this deposit 40 from the concave portion 55 for accumulation. After the absorbent core 41 precursor is covered with a core wrap (not shown), it is cut with a rotary cutter or the like, and is transported in the transport direction by a transport mechanism such as a conveyor belt. Thereby, the absorptive core 41 can be obtained. The thus obtained absorbent core 41 covered with a core wrap (not shown) is appropriately compressed by passing through a pair of rolls one or more times or the like to pressurize the whole or part thereof. As a result, the portion where the concave portion 56b is deposited is formed as the protruding portion 42 having a relatively large basis weight and thickness. Similarly, the part which consists of the core material piled up in the upstream area|region and the downstream area|region adjacent to the recessed part 56b forms the 1st area|region 41F and 2nd area|region 41R in the absorptive core 41 with a relatively small basis weight. In addition, the portion composed of the core material deposited on the first impermeable member 57 of the recessed portion 56b is formed as the top portion of the protruding boundary groove portion 43 that is relatively smaller than the basis weight of the first region 41F and the basis weight of the second region 41R. . It is composed of the core material deposited on the second impermeable member 58 in the upstream region and the downstream region adjacent to the concave portion 56b. The resulting portion is formed as the top of the groove portion 45 which is relatively smaller than the basis weight of the small absorbing portion 46 . From the upstream side region adjacent to the concave portion 56b to the downstream side region including the top portion of the protruding boundary groove portion 43 and the top portion of the groove portion 45, from the core deposited on the first air-impermeable member 57 and the second air-impermeable member 58 The material-constituted portion is formed as a continuous layer RS with a uniform thickness.

The material for forming each component of the sanitary napkin 1 of the present embodiment described above will be described.

The skin side sheet 2 forming the skin-opposing surface is made of a material having liquid permeability and including a thermoplastic synthetic resin. spinning. Examples of thermoplastic resins include olefin-based polymers such as ethylene and propylene, and polyethylene terephthalate, but are not limited to the above-mentioned examples. The skin side sheet 2 preferably has a basis weight of, for example, 10 to 100 g/m ² and a thickness of 0.5 to 5.0 mm. Moreover, the same material as the material conventionally used in this technical field can be used for the skin side sheet 2 without particular limitation, and a perforated film etc. can also be used.

The non-skin side sheet 3 is made of a material that is impermeable to liquid or impermeable and contains a thermoplastic synthetic resin, such as a synthetic resin film, a laminate of a synthetic resin film and a non-woven fabric, or a spunbond-meltblown-spun material. Laminated fiber nonwoven fabrics, hot air fiber nonwoven fabrics, point-bonded fiber nonwoven fabrics, spunbond fiber nonwoven fabrics, and other water-repellent nonwoven fabrics with high water pressure resistance, but are not limited to these, and can be used without particular limitations. The same material has been used in this technical field. 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, for example.

The core material of the absorptive core 41 contains the fiber aggregate which has fiber materials, such as pulp fiber. As the fiber material, various materials that have been conventionally used in absorbers of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, pulp fibers, rayon fibers, and cotton fibers can be used. Short fibers of cellulose fibers, short fibers of synthetic fibers such as polyethylene, etc. These fibers can be used alone or in combination of two or more. In addition, fibrous The material is preferably all or a part of pulp fibers, and the proportion of pulp fibers in the fiber material is preferably 50 to 100% by mass, more preferably 80 to 100% by mass, and still more preferably 100% by mass.

In addition, a water-absorbent polymer may be contained in the absorptive core 41 . Examples of the water-absorbing polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, sodium polyacrylate cross-linked body, (starch-acrylic acid) graft copolymer, (isobutylene-maleic anhydride) copolymer, and saponification thereof substances, polyaspartic acid, etc. By containing a water-absorbing polymer, it is possible to rapidly absorb and retain a large amount of excretory fluid such as blood more stably.

In addition, a deodorant, an antibacterial agent, etc. may be mix|blended with the absorptive core 41 as needed.

As a core wrap (not shown) which covers the absorptive core 41, a tissue paper, a water-permeable nonwoven fabric, etc. are mentioned. The absorber 4 is formed so that the upper and lower surfaces of the absorptive core 41 are covered with a core sheet (not shown). The purpose of using the core wrap (not shown) is to prevent leakage of the material forming the absorptive core 41 and to improve the shape retention of the absorptive core 41 . Between the core wrap (not shown) covering the skin-opposite side of the absorptive core 41 and the skin-side sheet 2, and the core wrap (not shown) covering the non-skin-opposite side of the absorptive core 41 and the non-skin Between the side sheets 3, it is preferable to use adhesives applied in patterns such as dots, spirals, stripes, etc. to join with each other.

As the side sheet 5, various materials conventionally used in this 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, and the like can be used. As other materials, for example, spunbond nonwoven fabrics, spunbond nonwoven fabrics (S) and meltblown nonwoven fabrics (M) composite sheets (for example, SM, SMS, SMMS, etc.), hot roll nonwoven fabrics, etc. can be mentioned. Water-repellent (hydrophobic) non-woven fabrics such as woven fabrics and hot air non-woven fabrics.

The junction part 6 which joins the side sheet 5 and the skin side sheet 2 can be formed by a usual method by heat-sealing processing.

The linear compression grooves 7 (the first horizontal compression groove 71, the second horizontal compression groove 72, and the vertical compression groove 73) are formed by Compression (rolling) working with or without heat (so-called embossing), or embossing such as ultrasonic embossing is formed by a usual method.

The effect of the sanitary napkin 1 of the present embodiment described above will be described.

As shown in FIGS. 1 to 2 , the sanitary napkin 1 has a protrusion 42 protruding toward the non-skin side sheet 3 in the middle region 41M of the absorbent core 41. As shown in FIG. 2, when the absorbent core 41 is viewed in plan, The protruding part 42 has the largest width part which has the longest length in the transverse direction Y of the absorptive core 41, and the length of the transverse direction Y of this largest width part is the same as the length of the transverse direction Y of the intermediate region 41M of the absorptive core 41. Therefore, even if the sanitary napkin 1 as an absorbent article is worn in a slightly shifted state, a sufficient amount of absorption can be ensured. Moreover, since the skin-opposing surface of the protruding part 42 is formed in a flat shape, the skin-opposing surface of the protruding part 42 in the absorptive core 41 is easily brought into close contact with the core wrap (not shown) covering the absorptive core 41 . The absorber 4 and the skin side sheet 2 are also easily adhered to the portion corresponding to the skin-opposing surface of the protruding portion 42 . As a result, the excretory fluid reaching the absorptive core 41 rapidly spreads in the horizontal direction on the surface opposite to the skin, and by further increasing the amount of absorption and the speed of absorption, it becomes less likely that liquid return and the like occur. In addition, since a step difference is not easily generated between the skin of the wearer and the sanitary napkin 1, and the conformability to the body shape is excellent, the wearer is unlikely to feel uncomfortable. In particular, in the sanitary napkin 1, the skin-opposite surface of the absorbent core 41 has a continuous layer RS with a uniform thickness from the first region 41F through the middle region 41M to the second region 41R, so that the wearer's skin and hygiene are It is less likely that there is a step difference between the cottons 1, and the fit to the body shape is improved. In addition, the thickness of the protrusion 42 in the middle region 41M of the absorptive core 41 is thicker than that of the first region 41F and the second region 41R of the absorptive core 41. Therefore, when the sanitary napkin 1 is worn, such as As shown in FIGS. 4 and 5 , in the front and rear regions of the longitudinal direction X of the protruding portion 42, a space K is likely to exist between the non-skin facing surface of the absorbent core 41 and the non-skin side sheet 3 or the core wrap (not shown), Using this space K, the sanitary napkin 1 is easily deformed into a shape having excellent cushioning properties in the longitudinal direction X, and the fit is improved.

In particular, the sanitary napkin 1 has a protruding center portion 421 formed by extending the maximum width portion in the longitudinal direction X by a predetermined length along both side edges of the absorptive core 41 along the longitudinal direction X. Therefore, the absorption capacity of the excretory fluid can be increased, and the sanitary napkin 1 as an absorbent article can be worn in a slightly shifted state, or the body movements during wearing, the body posture at bedtime, etc. can be sufficiently expressed. Absorption properties. Furthermore, by not generating a step difference between the skin side sheet 2 and the absorptive core 41, the excretory fluid is quickly absorbed by the absorptive core 41, and lateral leakage through the gap between the skin side sheet 2 and the absorptive core 41 is less likely to occur. 2 , the protruding portion 42 has a protruding center portion 421, a front-side protruding portion 422 protruding from the front end portion of the protruding center portion 421 in the longitudinal direction X to the first region 41F side, and the protruding center portion. The rear end of the longitudinal direction X of 421 protrudes toward the second region 41R side by at least one of the rear side convex portions 423 . Therefore, even if the sanitary napkin 1 is worn in a slightly shifted state, as long as the protruding portion 42 has any one of the front side convex portion 422 and the rear side convex portion 423, for the lateral direction Y from the two legs to the sanitary napkin 1 The inner force is due to the deformation of the front side convex portion 422 and the rear side convex portion 423, so that the protruding portion 42 is excellent in following the shape of the body, and does not easily bring discomfort to the wearer. In the sanitary napkin 1, in particular, since the protruding portion 42 has both the front-side convex portion 422 and the rear-side convex portion 423, the above-mentioned effects can be further obtained.

Moreover, regarding the sanitary napkin 1, as shown in FIG. 2, the front side convex part 422 and the rear side convex part 423 in the absorptive core 41 are respectively formed so that they may be located in the center of the transverse direction Y from the both sides along the longitudinal direction X. The tops 422t and 423t of the parts have a decreasing width d. Therefore, even if the sanitary napkin 1 is worn in a slightly shifted state, the conformability to the body shape is more excellent, and the wearer is less likely to feel uncomfortable.

Moreover, as shown in FIG. 2, the sanitary napkin 1 has the protrusion boundary groove part 43 which divides the protrusion part 42 and the part other than the protrusion part 42 in the intermediate area 41M of the absorptive core 41. As shown in FIGS. 4 and 5 , the protruding boundary groove portion 43 is formed so as to face the skin from the non-skin opposing surface of the absorbent core 41 . Concave on the opposite side. Therefore, it is easy to bend from the protruding boundary groove portion 43 as a starting point, and the wearer is less likely to feel uncomfortable. In particular, in the sanitary napkin 1, the protruding boundary groove portion 43 is formed so that the basis weight is lower than the basis weight of the first region 41F and the second region 41R in the absorptive core 41. Therefore, it is easier to bend from the protruding boundary groove portion 43 as a starting point, and the wearer is less likely to feel uncomfortable. Furthermore, the protruding boundary grooves 43 are formed over the entire length of the transverse direction Y of the absorbent core 41, so that the side edges of the transverse direction Y of the absorbent core 41 are easily folded according to the shape and movement of the wearer's body, thereby further improving the adhesion. compatibility.

In addition, as shown in FIG. 2 , the sanitary napkin 1 has an intermediate region 41M in the absorptive core 41: a front protruding abutting portion 44a disposed on the side of the first region 41F adjacent to the front protruding portion 422 constituting the protruding portion 42; And the rear protruding adjoining part 44c arrange|positioned at the 2nd area|region 41R side which adjoins the rear side convex part 423 which comprises the protruding part 42. As shown in FIGS. 4 and 5 , the protruding abutting portion 44 protrudes toward the non-skin side sheet 3 from the top of the cavity in the protruding boundary groove portion 43 , and the skin-facing surface is formed flat like the skin-facing surface of the protruding portion 42 . Therefore, a step difference between the wearer's skin and the sanitary napkin 1 is less likely to occur in the portion corresponding to the protruding boundary groove portion 43 , and the conformability to the body shape is excellent, so that the wearer is less likely to feel uncomfortable. In addition, in the sanitary napkin 1, the basis weight of the protruding abutting portion 44 is formed to be smaller than the basis weight of the first region 41F and the basis weight of the second region 41R in the absorptive core 41, and smaller than the basis weight of the protruding boundary groove portion 43 Therefore, even if the sanitary napkin 1 is worn in a slightly shifted state, sufficient absorption performance can be exhibited.

In addition, as shown in FIG. 2 , the first region 41F and the second region 41R of the absorptive core 41 of the sanitary napkin have the small absorption part 46 with a relatively large basis weight and the groove part 45 with a relatively small basis weight, so it is easy to use The groove portion 45 is bent as a starting point, and it is not easy to bring discomfort to the wearer. In the sanitary napkin 1, the absorptive core 41 has the groove part 45 and the small absorption part 46 in the 1st area|region 41F and the 2nd area|region 41R, and has the protrusion part 42, the protrusion boundary groove part 43, and the protrusion adjoining part 44 in the intermediate|middle area|region 41M It is integrally formed, so it has excellent fit to the body shape, and is not easy to bring discomfort to the wearer.

As mentioned above, although the preferable embodiment of this invention was demonstrated, the absorbent article of this invention is not limited to the sanitary napkin 1 of this embodiment at all, It can change suitably.

For example, in the sanitary napkin 1 , as shown in FIGS. 1 and 2 , the middle region 41M of the absorptive core 41 is disposed within the region of the excretion opposing region B of the sanitary napkin 1 , and the middle region 41M of the absorptive core 41 and the The excretion of the sanitary napkin 1 is inconsistent with respect to the area B, but it can be the same. That is, when the sanitary napkin 1 includes a pair of wing portions 1W on both outer sides of the lateral direction Y like the sanitary napkin 1, the intermediate region 41M exists between the wing portions 1W arranged at intervals in the longitudinal direction X of the respective wing portions 1W. between the roots. More specifically, the intermediate region 41M of the sanitary napkin 1 may be present over the roots of the wings 1W arranged at intervals in the longitudinal direction X among the wings 1W. In addition, the size of the front area A of the sanitary napkin 1 is substantially the same as the size of the first area 41F of the absorptive core 41, and the size of the rear area C of the sanitary napkin 1 is substantially equal to the size of the second area 41R of the absorptive core 41. At this time, the length of the longitudinal direction X of the middle region 41M of the sanitary napkin 1 is the same as the length between the roots of the wing parts 1W arranged at intervals in the longitudinal direction X in each of the wing parts 1W. Even with such an arrangement, the same effects as those of the sanitary napkin 1 described above can be obtained.

In addition, from the viewpoint of securing a sufficient amount of absorption, the sanitary napkin 1 of the present embodiment is preferably a so-called night sanitary napkin having a total length of 30 cm or more in the vertical direction X.

In addition, as shown in FIG. 2, in the absorptive core 41 of the sanitary napkin 1, the front side convex portion 422, the side edges 422s, 422s are not bent from the side edge 41s of the absorptive core 41 along the longitudinal direction X, respectively. The top portion 422t extends straight and straight, and the width d of the front side convex portion 422 decreases continuously from the side edge 41s of the absorbent core 41 along the longitudinal direction X to the top portion 422t, but the width d of the front side convex portion 422 may only decrease. , it can also decrease in steps. From the viewpoints of improving the fit to the body and improving the releasability when detaching from the concave portion 55 for stacking in the fiber stacking device, it is preferable that the front-side convex portion 422 extends straight and linearly, and the front-side convex portion 422 is preferably The width d of the convex portion 422 is from the edge of the absorbent core 41 The two side edges 41s and 41s of the longitudinal direction X continuously decrease toward the top 422t. The same applies to the rear side convex portion 423 .

In addition, although the thickness of the 1st area|region 41F and the 2nd area|region 41R of the sanitary napkin 1 is the same, as long as it is smaller than the thickness of the protrusion part 42, the thickness may differ from each other. Moreover, although the 1st area|region 41F and the 2nd area|region 41R of the sanitary napkin 1 have the same basis weight, as long as they are smaller than the basis weight of the protrusion 42, the basis weight may be different from each other. In addition, the first region 41F and the second region 41R of the sanitary napkin 1 have the groove part 45 and the small absorption part 46, but may not have the groove part 45 and the small absorption part 46, or may have the groove part 45 and the small absorption part 46 of different shapes. Absorber 46 .

In addition, although the absorptive core 41 of the sanitary napkin 1 is integrally formed as a whole, it may not be integrally formed. For example, in the absorptive core 41, from the 1st area|region 41F to the 2nd area|region 41R, it may be formed with the core material at the same height in advance, and then, the protrusion part 42 may be formed by arrange|positioning the member formed with other core material.

In addition, as shown in FIG. 1, the sanitary napkin 1 is provided with side sheets 5 on both sides of the skin-facing surface of the skin side sheet 2 along the longitudinal direction X, but from the viewpoint of preventing side leakage of bodily fluids, the side sheets 5 may be The free end of the sheet 5 is arranged in an elastic member in an extended state in the longitudinal direction X, and further forms a leak-proof cuff that can stand up toward the wearer's side.

Moreover, as shown in FIG. 1, although the sanitary napkin 1 has a pair of wing parts 1W and 1W on the left and right sides along the longitudinal direction X of the excretion opposing region B, it may not have a pair of wing parts 1W and 1W. Moreover, in addition to a pair of wing parts 1W and 1W, you may have a pair of rear wing parts on the left and right sides along the longitudinal direction X of the rear area C.

In addition, the sanitary napkin 1 shown in FIG. 1 has a pair of vertical compression grooves 73 extending in the longitudinal direction X of the absorptive core 41 as linear grooves for compressing and integrating the skin side sheet 2 and the absorptive core 41 , from the viewpoint of further preventing leakage, the grooves 73 are compressed so as to penetrate the absorbent core 41 in the longitudinal direction X. The protruding portion 42, the protruding boundary groove portion 43, and the protruding abutting portion 44 are formed. In addition, in the sanitary napkin 1 shown in FIG. 7 , the front and rear ends of the longitudinal direction X in the excretion opposing region B of the absorbent body 4 may be located more inward than the pair of vertical compression grooves 73 and the pair of first transverse compression grooves 71 . At the position, there are second lateral compression grooves 72 extending in the lateral direction Y, respectively. By providing the second lateral compression grooves 72 inside the sanitary napkin 1 in this way, the sanitary napkin 1 can be deformed from the second lateral compression grooves 72 as a starting point, thereby further improving the fit to the skin.

In addition, in the sanitary napkin 1 shown in FIG. 8 , a pair of second longitudinal compression grooves 73A, 73A may be provided in the excretion opposing region B along the longitudinal direction X of a pair of longitudinal compression grooves 73, 73 outside the lateral direction Y. By providing the second vertical compression grooves 73A and 73A, it is possible to further prevent the distortion of the excretory portion while maintaining the absorbency and flexibility of the first region 41F and the second region 41R. From the viewpoint of preventing twisting and fit, the second vertical compression grooves 73A and 73A are preferably arranged at the position of the intermediate region 41M in the longitudinal direction X. As shown in FIG.

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

In addition, in the sanitary napkin 1, as shown in FIG. 1, the size of the front area A of the sanitary napkin 1 is substantially the same as the size of the first area 41F of the absorptive core 41, but may not be the same. In addition, the size of the rear area C of the sanitary napkin 1 is substantially the same as the size of the second area 41R of the absorptive core 41, but may not be uniform.

In addition, the absorbent article of the present invention may be a pad (leucorrhea pad), an incontinence pad, and the like in addition to sanitary napkins.

Regarding the embodiment of the present invention described above, the following absorbent articles are further disclosed.

<1>

An absorbent article comprising: an absorbent body contained in front of a wearer an absorbent core of a longitudinally long shape corresponding to the rear direction; a skin side sheet covering the skin-opposite surface of the absorbent body; and a non-skin side sheet covering the non-skin-opposing surface of the absorbent body, and the The absorbent article has a front region and a rear region, 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 a thickness greater than that of the first region. and the thick protruding portion of the second region, the protruding portion protrudes toward the non-skin side sheet, and the protruding portion has a length in the transverse direction perpendicular to the longitudinal direction of the absorbent core when the absorptive core is viewed in plan view The largest maximum width portion, the length of the transverse direction of the maximum width portion is the same as the length of the transverse direction of the above-mentioned absorbent core.

<2>

<1> The absorbent article described above, wherein the protruding portion includes a protruding central portion, and the protruding central portion is formed by extending the maximum width portion in the longitudinal direction by a predetermined length along both side edges of the absorbent core in the longitudinal direction. Forming.

<3>

<2> The above-mentioned absorbent article, wherein the protruding portion includes a front-side protruding portion or a rear-side protruding portion that protrudes from the protruding center portion to the front side or the rear side so that the lateral length becomes narrower than the maximum width portion department.

<4>

The absorbent article according to any one of <1> to <3>, wherein the absorptive core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and the protruding boundary The groove portion is formed over the entire length in the lateral direction of the above-mentioned absorptive core.

<5>

As in <4> the said absorbent article, the said protrusion boundary groove part is formed so that it may dent from the non-skin opposing surface side of the said absorptive core to the skin opposing surface side.

<6>

The absorbent article according to <4> or <5>, wherein the protruding boundary groove portion is formed so that the basis weight is lower than the basis weight of the first region and the second region in the absorbent core.

<7>

The absorbent article according to any one of <1> to <6>, wherein the absorptive core has a protruding boundary groove portion that defines a boundary between the protruding portion and the portion other than the protruding portion in the intermediate region, and in the middle A region other than the protruding portion and the protruding boundary groove portion in the region has a protruding adjoining portion, and the basis weight of the protruding adjoining portion is smaller than the basis weight of the protruding portion and is the first region and the second region in the absorbent core. The basis weight of the second area is below.

<8>

<7> The absorbent article described above, wherein the protruding adjoining portion protrudes toward the non-skin side sheet from the top portion of the cavity in the protruding boundary groove portion, and the skin opposing surface is formed to be flat.

<9>

The absorbent article according to any one of <1> to <8>, wherein the protruding portion does not have a basis weight on the skin-opposing surface side lower than the basis weight of the first region and the second region in the absorbent core the recess.

<10>

The absorbent article according to any one of <1> to <9>, wherein the absorptive core has a thickness uniformity from the first region through the intermediate region to the second region on the skin-opposing surface. uniform continuous layer.

<11>

The absorbent article according to any one of <1> to <10>, wherein the entirety of the absorbent core is formed by integral molding.

<12>

The absorbent article according to any one of <1> to <11>, wherein the protruding portion includes the maximum width portion extending for a predetermined length in the longitudinal direction along both side edges of the absorbent core in the longitudinal direction. A protruding central portion formed; and a front-side convex portion and a rear-side convex portion protruding from the protruding central portion to the front and rear sides in such a manner that the lateral length becomes narrower than the above-mentioned maximum width portion, in the above-mentioned protruding central portion The longitudinal front end portion is provided with one of the front side convex portions, and the longitudinal rear end portion of the protruding central portion is provided with one of the above-mentioned rear side convex portions. Both sides are formed in such a manner that the horizontal length decreases toward the top of the central portion in the horizontal direction.

<13>

The absorbent article according to any one of <1> to <12>, wherein the protruding portion includes a protruding central portion, and the protruding central portion is located along both side edges of the absorbent core in the longitudinal direction of the largest width portion. The above-mentioned protruding center portion is formed by extending a predetermined length in the vertical direction, and the protruding center portion is formed so that the thickness thereof becomes smaller from the center portion in the horizontal direction toward the both side portions in the vertical direction.

<14>

The absorbent article according to any one of <1> to <13>, wherein the protruding portion includes a protruding central portion, and the protruding central portion is the longitudinal direction of the maximum width portion along the absorbent core. It is formed by extending a predetermined length in the longitudinal direction toward both side edges, and the protruding center portion is formed so that the basis weight decreases from the center portion in the transverse direction to the both side portions in the longitudinal direction when viewed in cross-section.

<15>

The absorbent article according to any one of <1> to <14>, wherein the absorptive core has a protruding boundary groove portion that defines a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and A region other than the protruding portion and the protruding boundary groove portion in the intermediate region has a protruding adjoining portion, and the basis weight of the protruding adjoining portion is smaller than that of the protruding portion and larger than the base weight of the protruding boundary groove portion.

<16>

According to <15> the above-mentioned absorbent article, the thickness of the protruding adjacent portion is the same as the thickness of the first region and the second region in the absorbent core, or is smaller than the thickness of the first region and the second region. .

<17>

The absorbent article according to any one of <1> to <16>, wherein the total length in the longitudinal direction of the protruding portion is 25% or more and 80% or less of the total length in the longitudinal direction of the absorptive core.

<18>

The absorbent article according to any one of <1> to <17>, wherein the protruding portion includes a protruding central portion, and the protruding central portion is located along both side edges of the absorbent core in the longitudinal direction of the largest width portion. When the longitudinal direction is extended by a predetermined length, the total length in the longitudinal direction of the protruding central portion of the protruding portion is 20% or more and 80% or less of the total longitudinal length of the protruding portion.

<19>

The absorbent article according to any one of <1> to <18>, wherein the absorptive core has a protruding boundary groove portion defining a boundary between the protruding portion and the other portion, and in the intermediate region, the protruding portion and the A region other than the protruding boundary groove portion has a protruding adjoining portion as a linear groove formed by compressing and integrating the skin side sheet and the absorptive core, and the absorbent article has one of extending in the longitudinal direction of the absorptive core. Regarding the vertical compression groove, the vertical compression groove is formed so as to vertically penetrate the protruding portion, the protruding boundary groove portion, and the protruding adjoining portion.

<20>

<19> The absorbent article described above, wherein the absorbent article has, as a linear groove formed by compressing and integrating the skin side sheet and the absorptive core, the absorbent article extending in the lateral direction inside the pair of vertical compression grooves. Horizontal compression groove.

<21>

The absorbent article according to <19> or <20>, wherein the absorbent article has a pair of second longitudinal compression grooves on the outer side of the lateral direction of the pair of longitudinal compression grooves in the longitudinal direction of the intermediate region.

<22>

The absorbent article according to any one of <1> to <21>, wherein a groove portion extending in the lateral direction is arranged in the first region and the second region of the absorptive core, and the basis weight of the groove portion is equal to The basis weight of the material forming the absorbent core is lower than that of the first region and the second region other than the groove portion.

<23>

The absorbent article according to any one of <1> to <22> above the absorbent core The first region and the second region are provided with grooves extending in the longitudinal direction, and the basis weight of the grooves is compared with the parts other than the grooves in the first and second regions, and the formation of the absorbent core The basis weight of the material is low.

<24>

The absorbent article according to any one of <1> to <23>, wherein the absorbent article includes a pair of wing portions on both lateral outer sides of the absorbent article, and the intermediate regions are present in each wing portion and are arranged at intervals in the longitudinal direction. between the roots of the wings.

<25>

The absorbent article according to <24>, wherein the intermediate region of the absorbent core extends between the roots of the wings.

<26>

The absorbent article according to <24> or <25>, wherein the length in the longitudinal direction of the middle region of the absorbent core is the same as the length between the roots of the wings.

<27>

The absorbent article according to any one of <1> to <26>, wherein the left and right sides in the front-rear direction of the absorbent article include leak-proof cuffs that can stand up to the wearer's side.

<28>

The absorbent article according to any one of <1> to <27>, wherein the absorbent article is a sanitary napkin with a total length of 30 cm or more.

industrial availability

According to the present invention, even if the absorbent article is worn in a slightly shifted state, it is possible to ensure a sufficient amount of absorption and to be excellent in conformability to the body shape, so that the wearer is less likely to feel uncomfortable.

1‧‧‧Sanitary napkins

1S‧‧‧Wings

1W‧‧‧wing

2‧‧‧Skin side piece

3‧‧‧Non-skin side panels

4‧‧‧Absorber

5‧‧‧Side piece

6‧‧‧Joint

7‧‧‧Linear compression groove

41‧‧‧Absorptive core

42‧‧‧Projection

71‧‧‧First horizontal compression groove

73‧‧‧Vertical Compression Groove

A‧‧‧Front area

B‧‧‧excretion relative area

C‧‧‧Rear area

CL‧‧‧Centerline

X‧‧‧Vertical

Y‧‧‧horizontal

Claims (10)

An absorbent article comprising: an absorbent body comprising an absorbent core having a shape long in the longitudinal direction corresponding to the front-rear direction of the wearer; a skin side sheet covering a skin-opposite surface of the absorbent body; and A non-skin side sheet covering the non-skin-opposing surface of the absorbent body, and the absorbent article has a front area and a rear area, and the absorbent article is characterized in that: the absorbent core is located in the first area on the side of the front area There is an intermediate area between the second area located on the side of the rear area, the intermediate area includes a protruding portion with a thickness greater than that of the first area and the second area, the protruding portion protrudes toward the non-skin side sheet, in a plan view In the case of the absorptive core, the protruding portion has a maximum width portion having the largest length in the transverse direction perpendicular to the longitudinal direction of the absorptive core, and the length of the maximum width portion in the transverse direction is the same as the length in the transverse direction of the absorptive core. . The absorbent article according to claim 1, wherein: the protruding portion includes a protruding central portion, and the protruding central portion is the maximum width portion extending a predetermined length in the longitudinal direction along both side edges of the absorbent core in the longitudinal direction. formed. The absorbent article according to claim 2, wherein: the protruding portion includes a front-side protruding portion or a rear side that protrudes from the protruding center portion to the front side or the rear side so that the lateral length becomes narrower than the maximum width portion convex part. The absorbent article according to claim 1, wherein: the absorptive core has a protruding boundary groove portion defining a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and the protruding boundary groove portion is formed in the absorbent The full length of the core in the transverse direction. The absorbent article of claim 1, wherein: the absorptive core has a protruding boundary groove portion defining a boundary between the protruding portion and a portion other than the protruding portion in the intermediate region, and the protruding portion in the intermediate region excluding the protruding portion And the region other than the protruding boundary groove portion has a protruding adjoining portion, and the basis weight of the protruding adjoining portion is smaller than the basis weight of the protruding portion, and is less than the basis weight of the first region and the second region in the absorbent core. . The absorbent article of claim 1, wherein: the absorptive core has, on the skin-opposing surface, a continuous layer having a uniform thickness from the first region through the intermediate region to the second region. The absorbent article of claim 1, wherein: the protruding portion includes: a protruding center portion formed by extending the maximum width portion in the longitudinal direction along both side edges of the absorbent core in the longitudinal direction by a predetermined length; and The front-side convex portion and the rear-side convex portion protrude from the protruding center portion to the front side and the rear side in such a manner that the lateral length becomes narrower than the maximum width portion, and are arranged at the longitudinal front end portion of the protruding center portion There is one above-mentioned front-side convex portion, one above-mentioned rear-side convex portion is arranged at the longitudinal rear end of the above-mentioned protruding central portion, and the above-mentioned front-side convex portion and the above-mentioned rear-side convex portion are respectively located from both sides in the longitudinal direction. The top of the central part is formed in such a way that its horizontal length decreases. The absorbent article according to claim 1, wherein: the absorbent core has a protruding boundary groove portion defining a boundary between the protruding portion and the portion other than the protruding portion in the intermediate region, and the protruding portion is excluded from the intermediate region in the intermediate region. And the area other than the protruding boundary groove portion has a protruding adjoining portion, and the basis weight of the protruding adjoining portion is smaller than the basis weight of the protruding portion and greater than the basis weight of the protruding boundary groove portion. The absorbent article according to claim 1, wherein: the absorbent core has a protruding boundary groove portion defining a boundary between the protruding portion and a portion other than the protruding portion, and the protruding portion and the protruding boundary are excluding the protruding portion in the intermediate region. The region other than the groove portion has a protruding adjacent portion, and the absorbent article has a pair of vertical compression grooves extending in the longitudinal direction of the absorptive core as a linear shape formed by compressing and integrating the skin side sheet and the absorptive core. The groove, wherein the vertical compression groove is formed so as to vertically penetrate the protruding portion, the protruding boundary groove portion, and the protruding adjoining portion. The absorbent article of claim 1, wherein: a groove portion extending in the lateral direction is arranged in the first region and the second region of the absorbent core, and the basis weight of the groove portion is the same as that of the first region and the second region. The basis weight of the forming material of the absorbent core is lower than that of the portion other than the groove portion in the second region.

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