CN105764458A - Absorbent article - Google Patents

Abstract

An absorbent article (1) provided with an absorbent core (4), which is long in the front-to-back direction of the absorbent article, and has a discharging area-facing section (B), which is disposed facing the liquid-discharging area of the wearer, and a back section (C), which is disposed behind same. The absorbent core (4) has a front crown region (41) in the middle of the discharging area-facing section (B) in the width direction and a back crown region (42) in the middle of the back section (C) in the width direction. The front crown region (41) and the back crown region (42) are each thicker than the thickness of the surrounding areas (43) of the absorbent core and are each divided by grooves (44) that extend in the width direction (Y) of the absorbent core. Multiple small absorbent parts (45, 48) are formed to line up along the longitudinal direction (X) of the absorbent core (4). The length (c) of the small absorbent parts (48) of the back crown region (42) is shorter than the length (b) of the small absorbent parts (45) of the front crown region (41).

Description

absorbent article

technical field

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

Background technique

In the prior art, in an absorbent article having a long length in the longitudinal direction along the front-back direction of the wearer, such as a night-use sanitary napkin suitable for sleeping, there is a gap between the wearer's skin and the wearer's skin. When there is a gap, there is a problem in that in the sleeping position, the liquid flows along the surface of the skin to the buttocks, causing liquid leakage.

For this purpose, there is known a technique of improving the fit to the body by forming a raised portion on the surface facing the skin at the thick middle and high portion of the absorber forming portion of the absorbent article. However, in the case of partially increasing the basic weight of the absorber to form a raised portion, there is a problem that the raised portion has high rigidity and is difficult to bend, or is bent at a certain point, which may cause damage to the wearer. Gaps are easily formed between the skin.

In addition, although Patent Document 1 proposes to divide the mid-height portion formed in the absorber into front and rear portions to reduce the gap with the body, the flexibility to fit the buttocks is insufficient. In addition, in order to improve the fit, there is a proposal to make the absorber block in the buttocks corresponding area, but in the case of forming the absorber in a single layer, it is too soft, and the absorber will block due to twisting during wearing Separated from each other, there is a problem of leakage.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2006-239162

Patent Document 2: Japanese Patent Laid-Open No. 2012-143535

Contents of the invention

The present invention provides an absorbent article comprising an absorbent core having a long shape in the front-rear direction of the absorbent article, and having: a discharge part opposing part arranged opposite to a wearer's liquid discharge part; The excretory part is a rear part of a position closer to the rear than the part of the excretion part. The absorptive core has a front mid-height region at a widthwise central portion of the excretory portion facing portion, and a rear mid-height region at a widthwise central portion of the rear portion. The respective thicknesses of the front mid-height region and the rear mid-height region are larger than the thickness of the peripheral region of the absorbent core, and the front mid-height region and the rear mid-height region are respectively separated by grooves extending in the width direction of the absorbent core, forming a A plurality of small absorbent portions arranged along the length of the absorbent core. The length of the small absorbing portion in the rear mid-height region in the longitudinal direction is smaller than the length of the small absorbing portion in the front mid-height region in the longitudinal direction.

Description of drawings

Fig. 1 is a perspective view showing a sanitary napkin according to a first embodiment of the present invention.

Fig. 2 is a perspective view showing an absorbent core of the sanitary napkin of Fig. 1 .

Fig. 3 is a III-III sectional view of Fig. 1 .

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1 .

Fig. 5 is a schematic cross-sectional view showing a deformed state of the absorbent core in the worn state of the sanitary napkin of Fig. 1 .

Fig. 6 (a) and Fig. 6 (b) are the schematic diagrams showing the section along the circumferential direction of the fiber stacking tube preferably used in the manufacture of the absorbent core of the sanitary napkin shown in Fig. 1, Fig. 6 (a ) is a diagram showing a state before the absorbent core forming material is deposited in the gathering recess, and FIG. 6( b ) is a diagram showing a state in which the absorbent core forming material is deposited in the gathering concave.

Fig.7 (a) - FIG.7(c) are top views which show the absorptive core which concerns on other embodiment of this invention.

detailed description

The object of this invention is to provide the absorbent article which can eliminate the disadvantage which the said prior art had.

Hereinafter, the present invention will be described based on preferred embodiments of the present invention with reference to the drawings.

The sanitary napkin 1 (hereinafter, simply referred to as the sanitary napkin 1 ) of the first embodiment of the absorbent article of the present invention is a nighttime sanitary napkin suitable for sleeping. A sanitary napkin having a total length of 30 cm or more is preferable.

As shown in FIG. 1 , the sanitary napkin 1 has an absorptive main body 6 long in the front-rear direction, a pair of wing parts 7 and 7 , and a pair of rear flap parts 8 and 8 . Regarding absorbent articles such as sanitary napkins, the "front-back direction" means a direction that coincides with the wearer's front-back direction when worn.

The sanitary napkin 1 has a front part A, an excretory part facing part B and a rear part C in its front-rear direction X, and a pair of wing parts 7, 7 are provided on the left and right sides of the absorbent main body 6 of the excretory part facing part B. The left and right sides of the absorptive main body 6 of C have a pair of rear flap parts 8,8.

In the absorbent article of the present invention, the excretory portion facing portion B is a portion disposed opposite to the wearer's liquid excretion portion (vaginal opening, etc.) in the central portion in the width direction, and the front portion A is disposed closer to the excretion portion facing portion B. The rear part B is a part located on the wearer's front side (abdominal side) than the excretory part facing part B on the wearer's back side. When the excretory part facing part B has wing parts like the sanitary napkin 1 of this embodiment, it has wing parts in the front-back direction of the absorbent article (same as the longitudinal direction of the absorbent main body. X direction in the figure). The region is a region sandwiched between the root on one side and the root on the other side in the front-rear direction of the wing. In addition, in this specification, the skin-facing surface refers to the side facing the wearer's skin when the absorbent article or its components are worn, and the non-skin-facing surface refers to the side where the absorbent article or its components are in contact with the wearer's skin when worn. The side opposite to the side, that is, the side facing the clothes.

As shown in Fig. 3 or Fig. 4, the sanitary napkin 1 comprises: a skin side panel 2 forming a skin-facing side; a non-skin side panel 3 forming a non-skin-facing side; Sexual core4. The skin-side sheet 2 includes a liquid-permeable front sheet 2a and a pair of sheets 2b, 2b for three-dimensional guard formation joined to both sides thereof. The liquid-permeable topsheet 2a is arranged over the entire length of the absorbent main body 6 in the central part of the absorbent main body 6 in the width direction. The three-dimensional enclosure forming sheet 2b has a folded portion 21 that is folded outward at the center side in the width direction of the absorbent main body 6, and is joined to a joint portion 22 positioned slightly outside the folded portion 21 in the width direction. On the front sheet 2a. The sheet 2b for forming the three-dimensional enclosure has the elastic member 24 for forming the three-dimensional enclosure near the side edge portion 23 of the free end forming the three-dimensional enclosure. The portion between the joint portion 22 and the side edge portion 23 stands up toward the wearer's skin side to form the three-dimensional shield 10 .

A pair of wing parts 7, 7 and a pair of rear flap parts 8, 8 include the three-dimensional enclosure forming sheet 2b and the non-skin side sheet 3 extending from both side edges of the absorptive core 4 . On the surface formed by the non-skin side sheet 3 respectively of a pair of wing parts 7, a wing part adhesive part 71 for being fixed to the non-skin facing side of the crotch part of the shorts is provided, and the non-skin facing side of the absorbent main body 6 A main body bonding portion (not shown) for fixing the main body 6 to the inner surface of the shorts is provided on the surface. The rear flap portion 8 is arranged on the inner surface (the surface facing the skin side) of the shorts when worn. Preferably, an adhesive portion for fixing to the inner surface of the shorts is also provided on the surface of the rear flap portion 8 formed by the non-skin side sheet 3 . The parts of the skin side sheet 2 and the non-skin side sheet 3 outside the peripheral portion of the absorbent core 4 are joined to each other with an adhesive, and are joined by heat sealing at the peripheral portion of the sanitary napkin 1 .

The absorbent core 4 in the sanitary napkin 1 is a fiber assembly made of a fiber material such as pulp fiber, or has a structure in which a superabsorbent polymer is held in the fiber assembly. The upper and lower surfaces of the absorptive core 4 are covered with a core wrap (not shown) made of tissue paper or a water-permeable nonwoven fabric. The purpose of using the core pack is to prevent leakage of the forming material of the absorbent core and to improve the shape retention of the absorbent core. Between the skin side sheet 2 and the wrapping core covering the skin-facing side of the absorbent core 4, and between the non-skin side sheet 3 and the wrapping core covering the non-skin-facing side of the absorbent core 4, it is preferable to pass through points. , spiral, stripes and other patterns coated adhesive bonded to each other.

As shown in FIG. 2 , the absorbent core 4 in the sanitary napkin 1 has a shape that is long in the same direction as the front-back direction X of the sanitary napkin 1 . Therefore, the longitudinal direction of the absorbent core 4 is the same direction as the front-back direction X of the sanitary napkin 1 , and the lateral direction of the absorbent core 4 is the same direction as the direction perpendicular to the front-back direction X of the sanitary napkin 1 .

In addition, the absorbent core 4 has a front mid-height region 41 at the center in the width direction Y of the excretory portion facing portion B of the sanitary napkin 1, and a rear mid-height region 42 at the center of the rear portion C in the width direction Y.

In the sanitary napkin 1, there is a front mid-high region 41 under the front sheet 2a, whereby a front raised portion 11 protruding toward the wearer's skin side is formed at the widthwise central portion of the skin-facing surface of the excretory portion facing portion B. , and there is a rear mid-height region 42 under the front sheet 2a, whereby a rear bulge 12 protruding toward the wearer's skin side is formed at the widthwise central portion of the skin-facing surface of the rear portion C. The rear raised portion 12 is preferably disposed facing the wearer's gluteal cleft when the sanitary napkin 1 is worn.

The front mid-height region 41 is a region having a thickness greater than that of the peripheral region 43 of the absorptive core 4, and is formed in the excretory part facing part B. As shown in FIG. The front mid-high region 41 may be formed only in the excretory portion facing portion B, but preferably extends from the excretion portion facing portion B to a part of the rear portion C as shown in FIG. 1 or 2 .

In addition, the front mid-height region 41 is partitioned by the groove portion 44 extending in the width direction of the absorbent core 4, thereby forming a plurality of small absorbent portions 45 arranged in the longitudinal direction X of the absorbent core 4 in the absorbent core 4. . In addition, in this embodiment, the groove part 46 extended in the longitudinal direction X of the absorptive core 4 is formed in the width direction center part of the front middle height area|region 41, and the small absorption part of the front middle height area 41 uses this groove part 46 45 is partitioned in the width direction Y of the absorptive core 4 .

The peripheral region 43 of the absorptive core 4 is an annular region that surrounds the front middle height region 41 and the rear middle height region 42 together. In addition, the thickness of the front mid-height region 41 is the thickness of the portion other than the grooves (the grooves 44 and 46 ) in the front mid-height region 41 , and is the same as the thickness of the small absorbing portion 45 . The thickness of the peripheral region 43 of the absorptive core 4 compared with the thickness of the front mid-height region 41 is the thickness of the peripheral region 43 of the absorptive core 4 located on the left and right sides of the front mid-height region 41 . In this way, when grooves such as grooves 51 extending in the width direction Y of the absorbent core 4 and grooves 52 extending in the longitudinal direction X of the absorbent core 4 are also formed in the peripheral region 43 of the absorbent core 4 , is the thickness of the portion where such a groove portion does not exist.

The thickness of the front mid-high region 41 is preferably that of the absorptive core 4 from the viewpoint of forming the front protruding portion 11 protruding to the skin on the skin-facing surface of the sanitary napkin 1 and improving the liquid absorbency of the excretion-facing portion B. The thickness of the peripheral region 43 is not less than 150%, more preferably not less than 200%, more preferably not more than 500%, more preferably not more than 300%, more preferably not less than 150% and not more than 500%, more preferably not less than 200% and not more than 300%. %the following. In addition, the difference between the thickness of the front mid-height region 41 and the thickness of the peripheral region 43 of the absorbent core 4, that is, the former-the latter, is preferably 2 mm or more, more preferably 3.5 mm or more, and is preferably 8 mm or less, more preferably 6 mm or less, and preferably 2 mm or more and 8 mm or less, more preferably 3.5 mm or more and 6 mm or less.

In addition, in the front mid-height region 41 of the absorptive core 4, the thickness of the grooves 44, 46 is preferably 67% or less of the thickness of the portion other than the grooves (the same as the thickness of the front mid-height region 41 and the small absorbing portion 45). It is preferably 45% or less, and preferably 25% or more, more preferably 35% or more, and preferably 25% or more and 67% or less, more preferably 35% or more and 45% or less.

In addition, the thickness of each part of an absorbent core is measured from the photograph of the cross-sectional end surface of the absorbent article under no load.

The rear middle height region 42 is a region thicker than the thickness of the peripheral region 43 of the absorptive core 4, and is formed in the rear part C. Moreover, the rear middle height area|region 42 is formed in the position behind rather than the front middle height area|region 41 in the longitudinal direction X of the absorptive core 4. As shown in FIG.

The rear mid-height region 42 is also partitioned by grooves 47 extending in the width direction of the absorptive core 4 , whereby the absorptive core 4 is formed with a plurality of small absorbent portions 48 aligned along the longitudinal direction X of the absorptive core. In addition, in this embodiment, the groove part extended in the longitudinal direction X of the absorptive core 4 is not formed in the rear mid-height region 42, and the small absorption part 48 of the rear mid-height region 42 is not formed in the width direction Y of the absorptive core 4. be separated.

The thickness of the rear mid-height region 42 is the thickness of the portion other than the groove portion (groove portion 47 ) in the rear mid-height region 42 , and is the same as the thickness of the small absorbing portion 48 . The thickness of the peripheral region 43 of the absorptive core 4 compared with the thickness of the rear mid-height region 42 is the thickness of the peripheral region 43 of the absorptive core 4 located on the left and right sides of the rear mid-height region 42 . In this way, grooves 51 extending in the width direction Y of the absorbent core 4 and grooves extending in the longitudinal direction X of the absorbent core 4 are also formed in the peripheral region 43 of the absorbent core 4 and the peripheral region 43 of the absorbent core 4 . In the case of a groove portion such as the groove portion 52 , it is the thickness of a portion where such a groove portion does not exist.

The thickness of the rear mid-height region 42 is preferably the absorbent core 4 from the viewpoint of forming the rear raised portion 12 projecting toward the skin on the skin-facing surface of the sanitary napkin 1 and improving the fit to the body, especially the gluteal cleft. 130% or more of the thickness of the peripheral region 43, more preferably 180% or more, in addition, preferably 300% or less, more preferably 230% or less, in addition, preferably 130% or more and 300% or less, more preferably 180% or more 230% or less. In addition, the difference between the thickness of the rear mid-height region 42 and the thickness of the peripheral region 43 of the absorbent core 4, that is, the former-the latter, is preferably 0.9 mm or more, more preferably 2.7 mm or more, and is preferably 4.7 mm or less, more preferably 4.7 mm or less. It is preferably 4.0 mm or less, and more preferably 0.9 mm or more and 4.7 mm or less, and more preferably 2.7 mm or more and 4.0 mm or less.

In addition, in the rear mid-height region 42 of the absorptive core 4, the thickness of the groove portion 47 is preferably 75% or less of the thickness of the portion other than the groove portion (the same as the thickness of the rear mid-height region 42 and the small absorbing portion 48), more preferably 75% or less. 55% or less, and preferably 30% or more, more preferably 40% or more, and preferably 30% or more and 75% or less, more preferably 40% or more and 55% or less.

Each of the front mid-height region 41 and the rear mid-height region 42 in this embodiment increases the grammage (unit: Area mass) is formed. That is, the basic weights of the core materials of the small absorbent portions 45 in the front middle height region 41 and the small absorbent portions 48 in the rear middle height region 42 are larger than that of the peripheral region 43 of the absorptive core 4 . The absorptive core 4 in the present embodiment is provided with a difference in thickness due to a difference in the basic weight of the core material. Therefore, unlike the case where a part of the absorbent core with a uniform basic weight is compressed to provide a difference in thickness, the absorbent core 4 is in the It is also overall soft in the peripheral region 43 .

In addition, in the absorbent core 4 of the present embodiment, the grooves 44 and 46 of the front mid-height region 41 and the grooves 47 of the rear mid-height region 42 are all compared with other parts of the front mid-height region 41 and the rear mid-height region 42 . Formed with reduced core material. That is, in the front mid-height region 41, the basic weight of the core material of the grooves 44, 46 is lower than that of the core material in the small absorbing portion 45. In addition, in the rear middle height region 42, the basic weight of the core material of the groove 47 is lower than that of the small absorbent portion 45. It is also lower than the grammage of the core material in the small absorbent portion 48 .

In addition, unlike the case where grooves are formed by locally compressing a portion with a uniform basis weight, the density of the core material of the grooves 44 and 46 in the front mid-height region 41 is lower than that in the small absorbing portion 45. Also in the rear mid-height region 42 , the density of the core material of the groove portion 47 is lower than that in the small absorbent portion 48 .

The grammage of the core material of the grooves 44, 46, 47 was obtained by cutting a sample of the groove along the boundary between the groove and the portion other than the groove, and the weight of the narrow sample The mass is divided by the area of the skin-opposite side of the sample. The basic weight of the portion other than the groove portion was obtained by cutting out a sample of the portion other than the groove portion 44 , 46 , and 47 , and dividing the mass of the sample by the area of the skin-facing surface side of the sample.

In addition, in the absorbent core 4 of this embodiment, as shown in FIG. The length b in the longitudinal direction X of the absorptive core 4 of the small absorbing parts 45, 45... of each is short. On the other hand, the groove part 44 of the rear middle height area|region 42 and the groove part 47 of the front middle height area|region 41 are equal to the length in the longitudinal direction X of the absorptive core 4.

In addition, in the example shown in FIG. 2 , the length b of the five small absorbent portions 45 formed in the front mid-height region 41 in the longitudinal direction X of the absorptive core 4 is the same as each other, and the two small absorbent portions formed in the rear mid-height region 42 have the same length b. The length c of the absorbent portion 48 in the longitudinal direction X of the absorptive core 4 is also the same as each other, but when there are small absorbent portions having different lengths in the front mid-height region 41 and/or the rear mid-height region 42, the front mid-height region The average value of the small absorbing portion of 41 is compared with the average value of the small absorbing portion of the rear mid-high region 42 to determine whether the length of the small absorbing portion of the rear mid-high region 42 is shorter than the length of the small absorbing portion of the front mid-high region 41.

According to the sanitary napkin 1 of the present embodiment, in the absorbent core 4, the front mid-height region 41 formed at the excretory portion facing portion B is divided into a plurality of small absorbent portions 45 by the groove portion 44, and the rear mid-height region formed at the rear portion C 42 is also divided into a plurality of small absorbing portions 48 by the groove portion 47, and the length c of the small absorbing portion 48 in the rear mid-high region 42 is shorter than the length b of the small absorbing portion 45 in the front mid-high region 41, so the length direction X of the sanitary napkin 1 The part having the front mid-high area 41 on the top is attached to the wearer's liquid excretion part, and excretion liquid such as menstrual blood excreted from the liquid excretion part is quickly absorbed, and exhibits excellent absorbency. In addition, the part of the rear portion C having the rear mid-high region 42 is softly curved to follow the shape of the skin surface with a smaller radius of curvature than the liquid discharge part of the wearer, as shown in FIG. The rear part facing the buttocks is also well fitted, thereby reliably preventing the liquid from flowing to the rear along the surface of the skin and causing leakage from the rear side.

Furthermore, unlike the case of simply making the absorbent core 4 thinner as a whole and dividing the absorbent core 4 with a uniform thickness into blocks, since the thickness and basic weight of the front mid-height region 41 and the rear mid-height region 42 are maintained, the It is soft, so it is not easy to be twisted in the sanitary napkin, or to damage the shape of the absorbent core 4, and it does not cause insufficient absorption capacity.

In this way, the sanitary napkin 1 of this embodiment has both the absorbency of the excretory part facing part B and the softness of the rear part C, can absorb stably without being damaged by twisting when worn, and can reliably prevent the rear side from leakage.

In addition, in the sanitary napkin 1 of this embodiment, the above-mentioned grooves 44, 46, 47, 51, 52 are formed on the skin-facing surface of the absorbent core 4, and whether or not these grooves are formed on the non-skin-facing surface of the absorbent core The continuous layer 59 cut at the groove portion. The continuous layer 59 is formed in a part of the thickness direction of the absorptive core 4, More specifically, it is formed in the fixed thickness range from the non-skin facing surface of the absorptive core 4.

Since the absorbent core 4 has the continuous layer 59 that is not cut by any of the grooves 44 of the front mid-height region, the grooves 47 of the rear mid-height region, and the intermediate region 53 between the front mid-height region 41 and the rear mid-height region 42 Therefore, when wearing, it can prevent damage due to twisting, and by making the liquid absorbed by each small absorbent part diffuse to the small absorbent part and the peripheral area adjacent to the continuous layer to absorb and fix the liquid, the absorbent core can be effectively used. 4. Reliably prevent leakage.

In addition, as shown in FIG. 2, the middle region 53 is located between the front mid-height region 41 and the rear mid-height region 42, and is thicker than the small absorbing portion 45 of the front mid-height region 41 and the small absorbing portion 48 of the rear mid-height region 42. Thin areas.

In addition, the front mid-high region 41 in the present embodiment has a lower basic weight of the core material in the grooves 44 and 46 than that of the small absorbing part 45, so it is formed in the same way as the one having compression by embossing or the like. Compared with the case of the groove part, the rigidity is lower, and the deformation of the core is not easily prevented, so the flexibility is good. Thereby, the fit property of the sanitary napkin 1 to the liquid excretion part of the wearer is high, and the leakage prevention property can be further improved.

From this point of view, in the front mid-height region 41, the basic weight of the core material of the grooves 44 and 46 is preferably 67% or less of the core material of the portion other than the grooves 44 and 46, more preferably 45% or less. , In addition, it is preferably 25% or more, and more preferably 35% or more.

In addition, since the basic weight of the core material of the groove part 47 is lower than the basic weight of the core material of the small absorbing part 48 in the rear mid-high region 42 in this embodiment, it is similar to having grooves formed by compression such as embossing. Compared with the case of the inner part, the rigidity is low, and the deformation of the core is not easily prevented, so the flexibility is good. Thus, the sanitary napkin 1 is softly curved so as to follow the shape of the skin surface with a smaller radius of curvature than the liquid discharge part of the wearer, and the buttocks facing part behind the liquid discharge part also has good fit, and has Better protection against rear side leakage.

From this point of view, in the rear mid-height region 42, the basic weight of the core material of the groove portion 47 is preferably 75% or less, more preferably 55% or less, of the core material of the portion other than the groove portion 47, and preferably It is 30% or more, more preferably 40% or more.

Moreover, in the absorptive core 4 of this embodiment, the average value of the area of the small absorption part 48 of the rear middle height area|region 42 is smaller than the average value of the area of the small absorption part 45 of the front middle height area|region 41. Thereby, the rear portion C having the rear mid-high region 42 can be deformed more flexibly, and the rear leakage prevention performance of the sanitary napkin 1 in the sleeping state is further excellent. From the viewpoint of obtaining the above-mentioned effects more reliably, the average value of the area of the small absorbing portion 48 in the rear middle-high region 42 is preferably 95% or less of the average value of the area of the small absorbing portion 45 in the front middle-high region 41, more preferably 90%. % or less, and preferably 15% or more, more preferably 50% or more, and preferably 15% or more and 95% or less, more preferably 50% or more and 90% or less. In addition, in the case where a plurality of small absorbing portions are partitioned and formed in the width direction Y by the groove portion 46 along the longitudinal direction X like the small absorbing portion 45 in the front mid-high region in this embodiment, the The respective areas of the portions formed by partitioning above are the areas of the small absorbing portions of the portions.

Moreover, the absorbent core 4 of this embodiment, as shown in FIG. The length d in the direction (refer to FIG. 2 ) is greater than the respective lengths in the longitudinal direction of the grooves 44 of the front middle height region 41 and the grooves 47 of the rear middle height region 42, and the thickness of the middle region 53 is different from the thickness of the peripheral region 43 of the absorbent core. equal.

By providing an intermediate region 53 having a longer length in the longitudinal direction than the grooves 44, 47 between the front mid-height region 41 and the rear mid-height region 42, the portion having the front mid-height region 41 can be suppressed during wearing of the sanitary napkin 1. The deformation state of the front mid-height region 41 affects the deformation state of the portion having the rear mid-height region 42, and the absorbency of the front mid-height region 41 and the fit of the rear portion C can be improved in a well-balanced manner.

Further, by making the thickness of the middle region 53 equal to the thickness of the peripheral region 43 of the absorbent core 4, it is possible to obtain the effect of suppressing the deformation state of the portion having the front mid-height region 41 from affecting the deformation state of the portion having the rear mid-height region 42, And it is possible to prevent twisting during wearing.

From the viewpoint of obtaining the above-mentioned effects of the middle region 53 more reliably, the above-mentioned length d (referring to FIG. 2 ) of the middle region 53 is preferably the respective length d of the groove portion 44 of the front middle-high region 41 and the groove portion 47 of the rear middle-high region 42. 2 times or more, more preferably 3 times or more, more preferably 25 times or less, more preferably 20 times or less, in addition, preferably 2 times or more and 25 times or less, more preferably 3 times or more and 20 times the length in the direction the following.

From the same point of view, the above-mentioned length d (refer to FIG. 2 ) of the intermediate region 53 is preferably 15 mm or more, more preferably 20 mm or more, more preferably 35 mm or less, more preferably 30 mm or less, and more preferably 15 mm or more and 35 mm or less. At most, it is more preferably at least 20 mm and at most 30 mm. In addition, the thickness of the middle region 53 is equal to the thickness of the peripheral region 43 of the absorbent core, which means that the thickness of the middle region 53 is not less than 80% and not more than 120% of the thickness of the peripheral region 43 of the absorbent core. More preferably, this ratio is Above 90% and below 110%.

In the sanitary napkin 1 of the present embodiment, the surface facing the skin of the absorbent main body 6, that is, the surface on the side of the front sheet 2a, as shown in FIGS. A linear groove 60 formed by integrally recessing three sides, the linear groove 60 has on both sides of the front mid-high region 41: a longitudinal groove 61 extending along the longitudinal direction X of the absorbent core 4; The front groove 62 and the rear groove 63 formed to extend in the lateral direction Y of the portion C; the middle region 53 between the front middle height region 41 and the rear middle height region 42, and the middle Transverse groove 64. The linear grooves can be formed by an ordinary method by pressing with or without heat (so-called embossing), or embossing such as ultrasonic embossing. In the linear groove, the topsheet 2a and the absorptive core 4 are integrated (bonded). In addition, the sanitary napkin 1 and its absorptive core 4 of this embodiment are formed bilaterally symmetrically with respect to the center line (not shown) which bisects the absorptive main body 6 in the width direction Y, as shown in FIG.

The width (the length in the direction perpendicular to the longitudinal direction of the linear groove) and the depth of the linear groove may be set in the same manner as the linear groove of this absorbent article. In addition, the "linear" in the linear groove is not limited to the shape of the groove (depressed portion) as a straight line in plan view, but also includes a curved line, and each line may be a continuous line or an intermittent line. For example, the linear groove may be constituted by a row of a plurality of discontinuous dot embossings.

The middle horizontal groove 64 functions as a bending guide. The front mid-height region 41 and the rear mid-height region 42 have the middle transverse groove 64 functioning as a bending guide in the middle region 53 between them, so that the middle transverse groove 64 can be used as a starting point to be connected with the movement of the wearer's body. Move each other. Therefore, between the front mid-height region 41 and the rear mid-height region 42 , the effect of preventing mutual deformation is improved, and it is difficult to leak and does not hinder the movement of the wearer, providing a comfortable wearing feeling.

On the other hand, the vertical grooves 61, the front grooves 62 and the rear grooves 63 can suppress liquid diffusion in a direction parallel to the skin-facing surface of the sanitary napkin 1, effectively preventing liquid from leaking around the sanitary napkin 1. In addition, the middle horizontal groove 64 (bending guide portion) in the present embodiment has a shape curved convexly backward as shown in FIG. 1 , but the bending guide portion such as the middle horizontal groove in the present invention may The shape extending linearly in the width direction Y may be a shape curved convexly forward.

In addition, in the absorbent core 4 of this embodiment, as described above, the groove portion 46 extending in the longitudinal direction X of the absorbent core is formed in the front mid-height region 41, and the small absorbent portion in the front mid-height region 45 is partitioned in the width direction Y of the absorptive core. Therefore, the liquid suction performance of the front mid-height region 41 is further improved, and has better liquid leakage resistance.

In addition, the whole absorptive core 4 of this embodiment is molded integrally. The so-called "integrated molding" is different from the structure that combines parts manufactured by different processes with adhesives, compression, etc., and means that the same material is used to form an integral body in one process.

As shown in Fig. 6(a), the absorbent core 4 of the above-mentioned sanitary napkin 1 is manufactured with a fiber piling device, and the fiber piling device includes: a fiber tube 54 ; and a duct (not shown) for supplying the core material in a scattered state to the outer peripheral surface of the fiber stacking tube 54 .

A plurality of collecting 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 concavity 55 for accumulation is made of a mesh or the like, and has a large number of pores functioning as suction holes.

In addition, as shown in FIG. 6( a ), two recesses 56 b and 56 c for forming the front mid-height region 41 and the rear mid-height region 42 are formed on a part of the bottom surface 56 of the gathering recess 55 . In addition, an air-impermeable member 57 for forming the grooves 44 and 46 in the front mid-height region 41 is arranged at the bottom of the recess 56b, and an air-impermeable member 57 for forming the groove 47 in the rear middle-height region 42 is also arranged at the bottom of the recess 56c. Part 57. In addition, on the bottom surface 56 of the concentrating recess 55 , except for the recesses 56 b and 56 c , an air-impermeable member 58 for forming the grooves 51 and 52 is formed. The impermeable air-permeable members 57 and 58 are fixed so as to protrude from the bottom surface of the gathering recess 55 , and may be non-air-permeable members such as metal, plastic, ceramics, and the like.

Suction is performed from the bottom surface of the gathering recess 55 similarly to a known fiber stacking device having a stacking drum, and a core material such as pulp fiber is supplied into the duct, whereby, as shown in FIG. 6( b ), the core material is gathered It is deposited in a predetermined shape in the concave portion 55 . The absorptive core 4 is obtained by releasing this deposit 40 from the recessed part 55 for accumulation. The absorptive core 4 is pressurized and suitably compressed by passing between a pair of rollers, etc. before or after being covered with the wrapping sheet. As a result, the portion including the core material deposited on the air-impermeable member 57 becomes the groove portions 44, 46, 47 having a relatively small basis weight and density, and there is no bottom surface of the air-impermeable member 57 in each of the recesses 56b, 56c. The upper stacked part becomes the small absorbing part 45, 48 with relatively high grammage and density. Similarly, the parts other than the recesses 56b, 56c, including the core material deposited on the impermeable member 58, become the grooves 51, 52 with relatively small grammage and density. The upper accumulation part becomes the small absorbing part 45, 48 with relatively high grammage and density. When producing an absorbent core containing a water-absorbent polymer, it is preferable to provide an introduction portion of the water-absorbent polymer in the middle of the duct.

For the front sheet 2a, the sheet for forming three-dimensional gathers 2b, and the non-skin side sheet 3, the same materials as those conventionally used in this technical field can be used without particular limitation. For example, a liquid-permeable nonwoven fabric or a perforated film can be used as the top sheet 2a. As the non-skin side sheet 3 , a liquid-impermeable film made of synthetic resin, a spunbond-meltblown-spunbond laminated nonwoven fabric, and a water-repellent nonwoven fabric with high water pressure resistance can be used. Moreover, as the sheet|seat 2b for three-dimensional guard formation, the water-repellent nonwoven fabric with high water pressure resistance, for example, a spunbond-meltblown-spunbond laminated nonwoven fabric etc. can be used.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not limited to the above-mentioned embodiment.

For example, in the sanitary napkin 1 of the above-mentioned embodiment, the small absorbent portion 45 of the front mid-height region 41 is partitioned in the width direction by the groove portion 46 extending in the longitudinal direction of the absorbent core, but the front mid-height region in the present invention The small absorbent portion 45 of 41 may not be separated in the width direction by the groove portion extending in the longitudinal direction of the absorbent core (refer to FIG. The small absorbent portions 48 in the rear mid-height region 42 may be partitioned by grooves extending in the longitudinal direction of the absorbent core. In addition, in the absorbent core of the present invention, the front mid-height region 41 and the rear mid-height region 42 are divided into a plurality of small absorbent portions 45, 48 by grooves 44, 47 extending in the lateral direction, respectively, and the front mid-height region 41 and the rear mid-height region 41 The respective small absorbing portions 45 and 48 of the mid-height region 42 are partitioned in the width direction by groove portions 46 extending in the length direction. In addition, the above-mentioned partition method may also be the method shown in FIG. 7( b ).

In addition, in the sanitary napkin 1 of the above-mentioned embodiment, the groove portion 51 extending in the width direction of the absorbent core and the absorbent core 4 are formed in parts other than the front mid-height region 41 and the rear mid-height region 42 of the absorptive core 4. The groove portion 52 extending in the longitudinal direction of the flexible core may be formed, but one or both of them may not be formed.

In addition, instead of linear grooves such as the middle horizontal groove 64, as the bending guide portion formed in the middle region 53 between the front middle height region 41 and the rear middle height region 42, a plurality of deep recesses may be formed intermittently. Instead, dot-like embossing is provided. In addition, no bending guide portion may be provided in the intermediate region 53 .

Moreover, as shown in FIG.7(c), it is preferable to form the side protrusion part 49,49 which protrudes to the outer side of the width direction of the absorptive core 4 on both sides which pinches|interposes the front middle height area|region 41. The thickness of the side protrusions 49 , 49 may be the same as that of the small absorbing portion 45 of the front mid-height region 41 , but is preferably thinner than the small absorbing portion 45 of the front mid-height region 41 .

By providing the side protrusions 49, 49, even if the wearing position deviates to a certain extent, the absorbing performance can be fully exhibited, twisting is less likely to occur, the uncomfortable feeling is reduced, and the liquid leakage resistance is improved.

The side protrusions 49, 49 are also preferably partitioned in the longitudinal direction of the absorptive core 4 by the groove 44 extending in the width direction of the absorptive core 4, and preferably between the front middle height region 41 and the side protrusions 49. A groove portion thinner than the thickness of these two parts is provided between them.

In addition, the grooves 44, 46, and 47 of the front mid-height region 41 and the rear mid-height region 42 may be formed by embossing and compressing a part of the front mid-height region 41 and the rear mid-height region 42 having a uniform basis weight. In addition, the grooves 51 and 52 formed in parts other than the front mid-height region 41 and the rear mid-height region 42 may be formed by locally compressing the portions other than the front mid-height region 41 and the rear mid-height region 42 .

In the front mid-high region 41, the number of small absorbing portions 45 arranged in the longitudinal direction X of the absorbent core 4 (five in the above-mentioned embodiment, three in the example shown in FIG. 7( b ) ) is 2 or more, preferably 3 or more, and preferably 10 or less, more preferably 5 or less.

In the rear mid-height region 42, the number of small absorbent portions 48 (two in the above-mentioned embodiment) arranged in the longitudinal direction X of the absorbent core 4 is 2 or more, and preferably 5 or less. , more preferably 3 or less.

In addition, like the sanitary napkin 1 of this embodiment, there are grooves 44 , 46 , 47 located on the outer sides in the width direction and in the front-rear direction peripheral regions of the front mid-height region 41 and the rear mid-height region 42 of the absorbent core 4 . When the horizontal grooves or the vertical grooves are on the same line, the diffusibility of bodily fluid is good, and the followability to the movement during wearing is high, so it is preferable.

In addition, the absorptive core may be formed only of fiber materials, such as pulp fiber, or may contain both a fiber material and a superabsorbent polymer. As the fiber material, various materials conventionally used for absorbent bodies of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, fibers such as pulp fibers, rayon fibers, and cotton fibers can be used. Short fibers of plain fibers, short fibers of synthetic fibers such as polyethylene, etc. These fibers can be used individually by 1 type or in combination of 2 or more types. In addition, it is preferable that all or a part of the fiber material is pulp fiber, and the ratio of the pulp fiber in the fiber material is preferably 50 to 100% by mass, more preferably 80 to 100% by mass, and still more preferably 100% by mass. In addition, in addition to the superabsorbent polymer, a deodorant, an antibacterial agent, and the like may be mixed in the absorbent core as needed.

In addition, the absorbent article of the present invention may be other absorbent articles such as panty liners (leucorrhea pads), incontinence pads, and disposable diapers, in addition to sanitary napkins. Parts that are omitted from description in one embodiment described above and components that only one embodiment has can also be applied to other embodiments, and the components of each embodiment can be substituted for each other as appropriate between the embodiments.

Regarding the above-mentioned embodiment, the present invention also discloses the following absorbent articles.

<1> An absorbent article comprising an absorbent core having a shape that is long in the front-rear direction of the absorbent article, and having a discharge portion opposing portion disposed opposite to a wearer’s liquid discharge portion, and a discharge portion opposite to the liquid discharge portion. In the above-mentioned absorbent article, the above-mentioned absorbent core has a front mid-high region at a central portion in the width direction of the excretion portion-facing portion, and at the center of the width direction in the above-mentioned rear portion. The portion has a rear mid-height region, the respective thicknesses of the front mid-height region and the rear mid-height region are greater than the thickness of the peripheral region of the absorbent core, and the front mid-height region and the rear mid-height region are respectively extended in the width direction of the absorbent core. The grooves are divided to form a plurality of small absorbers arranged along the longitudinal direction of the absorbent core, and the length of the small absorbers in the rear mid-height region in the longitudinal direction is smaller than the length of the small absorbers in the front mid-height region. The length of the section in the length direction.

<2> The absorbent article according to <1>, wherein the absorbent core includes a continuous layer that is not separated by the grooves in the front mid-height region, the grooves in the rear mid-height region, and in the longitudinal direction. Any one of the intermediate regions located between the front mid-height region and the rear mid-height region is cut off.

<3> The absorbent article according to the above <1> or <2>, wherein the basic weight of the forming material of the absorbent core in the groove portion in each of the front mid-height region and the rear mid-height region is It is smaller than the basis weight of the forming material of this absorptive core in the said small absorption part.

<4> The absorbent article according to any one of <1> to <3>, wherein an average value of the area of the small absorbent portion in the rear mid-height region is smaller than the area of the small absorbent portion in the front mid-height region. The average value of the area of the absorption part.

<5> The absorbent article according to any one of <1> to <4> above, wherein a center is formed between the front mid-height region and the rear mid-height region in the longitudinal direction of the absorbent core. region, the length of the intermediate region in the longitudinal direction of the absorbent core is greater than the respective lengths of the grooves in the front mid-height region and the grooves in the rear mid-height region in the longitudinal direction (the length direction of the absorbent core), and the above-mentioned The thickness of the middle region is equivalent to the thickness of the peripheral region of the above-mentioned absorptive core.

<6> The absorbent article as described in said <5> in which the bending guide part extended in the width direction of the said absorptive core is formed in the said intermediate region.

<7> The absorbent article according to any one of <1> to <6>, wherein a groove extending in the longitudinal direction of the absorbent core is formed in the front mid-high region, and the groove is used to A part partitions the said small absorption part of the said front middle height area|region in the width direction of an absorptive core.

<8> The absorbent article as described in any one of said <1>-<7> in which the groove part extended in the longitudinal direction of the said absorptive core is not formed in the said rear middle height region.

<9> The absorbent article according to any one of <1> to <8>, wherein the width of the absorbent core is formed on both sides of the front mid-height region across the front mid-height region. A side protrusion that protrudes outside the direction.

<10> The absorbent article according to any one of <1> to <9>, wherein grooves extending in the width direction are arranged in the peripheral region of the absorbent core, and the grooves extending in the width direction are arranged in the peripheral region. The basis weight of the forming material of the absorptive core in this groove part is low compared with the part other than this groove part.

<11> The absorbent article according to any one of <1> to <10>, wherein grooves extending in the longitudinal direction are arranged in the peripheral region of the absorbent core, and the grooves extending in the longitudinal direction are arranged in the peripheral region. The basis weight of the forming material of the absorptive core in this groove part is low compared with the part other than this groove part.

<12> The absorbent article according to any one of <1> to <11>, wherein the rear mid-height region has a smaller length in the width direction than the front mid-height region.

<13> The absorbent article according to any one of <1> to <12>, wherein grooves extending in the width direction are arranged in the middle region, and the grooves in the peripheral region are separated from each other. The basis weight of the forming material of the absorbent core in this groove portion is low compared to other portions.

<14> The absorbent article according to any one of <1> to <13>, wherein grooves extending in the longitudinal direction are arranged in the middle region, and the grooves in the peripheral region are separated from each other. The basic weight of the forming material of the absorbent core in this groove part is low compared with other parts.

<15> The absorbent article according to any one of <1> to <14>, wherein the groove portion extending in the longitudinal direction in the front mid-height region is separated from the grooves in the peripheral region and the middle region. The grooves extending in the longitudinal direction are on the same line, and the rear mid-height region is on at least one of the same lines.

<16> The absorbent article according to any one of <1> to <15>, wherein the groove portion extending in the width direction in the rear mid-height region and the groove portion extending in the width direction in the peripheral region are The grooves of are on the same line.

<17> The absorbent article according to any one of the above <1> to <16>, wherein the absorbent core is formed by integral molding.

<18> The absorbent article according to any one of <1> to <17>, wherein in the peripheral region of the rear portion, there are grooves extending in the width direction and a groove extending in the longitudinal direction. The extended groove portion divides the absorbent core into a small absorbent portion in the rear peripheral region, and the small absorbent portion in the rear mid-high region has a smaller area than the small absorbent portion in the rear peripheral region.

<19> The absorbent article according to any one of <1> to <18>, wherein outer peripheries of the front mid-height region and the rear mid-height region are surrounded by linear pressed grooves.

<20> The absorbent article according to any one of <1> to <19>, wherein a pair of wing portions are provided on both outer sides in the width direction in the excretion portion facing region of the absorbent article.

<21> The absorbent article according to any one of the above <1> to <20>, wherein the side projecting portion is arranged in a region overlapping the pair of wing portions in the longitudinal direction.

<22> The absorbent article as described in any one of said <1>-<21> which has a rear flap part in the width direction rear part of the said rear part.

<23> The absorbent article according to any one of <1> to <22> above, wherein the absorbent article is provided on both the left and right sides along the front-back direction of the absorbent article so that it can stand up toward the wearer. Three-dimensional fencing.

<24> The absorbent article according to the above <23>, wherein the three-dimensional barrier can be erected in the excretion-facing part, and has a three-dimensional barrier forming sheet fixed to the front surface in the rear part. The part that is difficult to stand up.

<25> The absorbent article according to the above <23> or <24>, wherein the rear mid-height region is arranged in a region overlapping in the front-rear direction with the difficult-to-stand portion of the three-dimensional guard.

<26> The absorbent article according to any one of the above <1> to <25>, wherein the absorbent article is a sanitary napkin with a total length of 30 cm or more.

Industrial availability

According to the absorbent article of the present invention, both the absorbency of the excretory part and the softness of the rear part can be obtained simultaneously, and the absorbent article can absorb stably without being damaged by twisting when worn, and can reliably prevent rear side leakage.

Claims (26)

1. An absorbent article comprising an absorbent core having a long shape in the front-rear direction of the absorbent article, and having a discharge-portion opposing portion disposed opposite to a wearer's liquid discharge portion and a discharge portion disposed on a side opposite to the discharge portion. The rear portion of the relative portion is closer to the rear, and the absorbent article is characterized by: The absorbent core has a front mid-height region at a widthwise central portion in the excretory portion facing portion, and a rear mid-height region at a widthwise central portion of the rear portion, Each of the front mid-height region and the rear mid-height region has a thickness greater than the thickness of the peripheral region of the absorbent core, and the front mid-height region and the rear mid-height region are respectively covered by groove portions extending in the width direction of the absorbent core. Separation, formed with a plurality of small absorbent parts arranged along the length direction of the absorbent core, The length of the small absorbing portion in the rear mid-height region in the longitudinal direction is smaller than the length of the small absorbing portion in the front mid-height region in the longitudinal direction. 2. The absorbent article of claim 1, wherein: The absorbent core comprises a continuous layer that is not covered by the grooves of the front mid-height region, the grooves of the rear mid-height region, and the intermediate height region longitudinally between the front mid-height region and the rear mid-height region. Any of the areas are cut off. 3. The absorbent article according to claim 1 or 2, characterized in that: In each of the front mid-height region and the rear mid-height region, the basic weight of the absorbent core forming material in the groove portion is smaller than the basic weight of the absorbent core forming material in the small absorbent portion. . 4. The absorbent article according to any one of claims 1 to 3, characterized in that: An average value of areas of the small absorbing portions in the rear mid-height region is smaller than an average value of areas of the small absorbing portions in the front mid-height region. 5. The absorbent article according to any one of claims 1 to 4, characterized in that: An intermediate region is formed between the front mid-height region and the rear mid-height region in the longitudinal direction of the absorbent core, and the length of the middle region in the longitudinal direction of the absorbent core is greater than that of the front mid-height region. The lengths of the grooves and the grooves of the rear middle height region in the longitudinal direction of the absorbent core are the same, and the thickness of the middle region is the same as the thickness of the peripheral region of the absorbent core. 6. The absorbent article of claim 5, wherein: The bending guide part extended in the width direction of the said absorptive core is formed in the said intermediate area|region. 7. The absorbent article according to any one of claims 1 to 6, characterized in that: The groove part extended in the longitudinal direction of the said absorptive core is formed in the said front middle height area|region, and the said small absorption part of the said front middle height area|region is partitioned in the width direction of an absorptive core by this groove part. 8. The absorbent article according to any one of claims 1 to 7, characterized in that: The groove part extended in the longitudinal direction of the said absorptive core is not formed in the said rear mid-height region. 9. The absorbent article according to any one of claims 1 to 8, characterized in that: The side protrusion part which protrudes outward in the width direction of an absorptive core is formed in both sides of the said front middle height area|region across the said front middle height area|region. 10. The absorbent article according to any one of claims 1 to 9, characterized in that: Grooves extending in the width direction are arranged in the peripheral region of the absorbent core, and the basis weight of the forming material of the absorbent core in the grooves is lower than that in the peripheral region other than the grooves. lower. 11. The absorbent article according to any one of claims 1 to 10, characterized in that: Grooves extending in the longitudinal direction are arranged in the peripheral region of the absorbent core, and the basic weight of the forming material of the absorbent core in the grooves is lower than that in the peripheral region other than the grooves. lower. 12. The absorbent article according to any one of claims 1 to 11, characterized in that: The length in the width direction of the rear mid-height region is smaller than that of the front mid-height region. 13. The absorbent article according to any one of claims 1 to 12, characterized in that: In the said intermediate area|region, the groove part extended in the width direction is arrange|positioned, and the basic weight of the formation material of an absorptive core is low in this groove part compared with the part other than this groove part in the said peripheral region. 14. The absorbent article according to any one of claims 1 to 13, characterized in that: The groove part extended in the longitudinal direction is arrange|positioned in the said intermediate area|region, and the basic weight of the forming material of an absorptive core is lower in this groove part than the part other than this groove part in the said peripheral area. 15. The absorbent article according to any one of claims 1 to 14, characterized in that: The grooves extending in the longitudinal direction of the front mid-height region are on the same line as the grooves extending in the length direction of the peripheral region and the middle region, and the rear mid-height region is located on at least one The same online. 16. The absorbent article according to any one of claims 1 to 15, characterized in that: The groove extending in the width direction of the rear mid-height region and the groove extending in the width direction of the peripheral region are located on the same line. 17. The absorbent article according to any one of claims 1 to 16, characterized in that: The said absorbent core is comprised by integral molding. 18. The absorbent article according to any one of claims 1 to 17, characterized in that: In the peripheral region of the rear portion, the absorbent core is divided into small absorbent portions in the rear peripheral region by the grooves extending in the width direction and the grooves extending in the longitudinal direction, and the small absorbent parts in the rear peripheral region are separated from each other. The small absorber in the rear mid-high area has a smaller area compared to the lower part. 19. The absorbent article according to any one of claims 1 to 18, characterized in that: The outer peripheries of the front mid-height region and the rear mid-height region are surrounded by linear pressed grooves. 20. The absorbent article according to any one of claims 1 to 19, characterized in that: A pair of wing portions are provided on both outer sides in the width direction in the excretory portion facing region of the absorbent article. 21. The absorbent article according to any one of claims 1 to 20, characterized in that: The side protruding portion is disposed in a region overlapping the pair of wing portions in the longitudinal direction. 22. The absorbent article according to any one of claims 1 to 21, characterized in that: The said absorbent article has a rear flap part in the width direction rear part of the said rear part. 23. The absorbent article according to any one of claims 1 to 22, characterized in that: Three-dimensional guards that can stand up toward the wearer's side are provided on both left and right sides along the front-back direction of the absorbent article. 24. The absorbent article of claim 23, wherein: The said three-dimensional guard can stand up in the said excretion part facing part, and has the part which is hard to stand up by the sheet for three-dimensional guard formation being fixed to the front sheet in the said rear part. 25. The absorbent article of claim 23 or 24, wherein: The rear mid-height region is arranged in a region overlapping in the front-rear direction with the difficult-to-stand portion of the three-dimensional enclosure. 26. The absorbent article according to any one of claims 1 to 25, characterized in that: The absorbent article is a sanitary napkin with a total length of 30 cm or more.