WO2015012155A1 - Absorptive article - Google Patents

Abstract

This absorptive article (1) has wing sections (7) on both sides of an excretory part-facing section (B). An absorption body (4) has, in the excretory part-facing section (B), an excretory part slit region (S) in which longitudinal slits (43) extending in the longitudinal direction (X) are formed dispersedly, and the absorption body (4) also has a center slit region (S1) at the center thereof in both the transverse direction (Y) and the longitudinal direction (X). An absorptive body (5) has longitudinal grooves (51) formed outside the center slit region (S1) on both the left and right sides thereof. The absorption body (4) has, formed outside the center slit region (S1) on both the left and right sides thereof: longitudinal slits (43a-43e) overlapping the longitudinal grooves (51); and longitudinal slits (43f, 43g) located on the outside of the longitudinal grooves (51).

Description

Absorbent articles

The present invention relates to an absorbent article such as a sanitary napkin.

In order to prevent side leakage of absorbent articles such as sanitary napkins and incontinence pads, it is conceivable to increase the absorbent capacity by widening the width of the absorbent article and its absorbent body. However, when the width of the absorbent body is simply widened, the side of the absorbent body extends from the side edge of the crotch part of clothing such as shorts, and the wing part is wrapped around the crotch part and fixed. There is a possibility that the workability may be deteriorated, or that the portion protruding from the crotch portion may be twisted to deteriorate the feeling of wearing. The twist is not a deformation generated for the purpose of improving performance such as fit, but an unintended deformation.

In addition, a technique for forming slits and openings in the absorber is known.
For example, Patent Document 1 describes that four or more rows of slits having a predetermined length are formed at predetermined intervals in a portion of the absorber other than the periphery.
Patent Document 2 describes that a plurality of cut portions are formed in a low-rigidity portion surrounded by a joining pattern in which a top sheet and a liquid absorbing layer are joined.

Japanese Patent Laid-Open No. 63-18122 JP 2006-081558 A

The inventors of the present invention have studied to increase the flexibility of the absorber by forming slits in the absorber in a dispersed state, but when the slit is formed in the absorber, the wing portion is pulled and fixed to the crotch portion. In addition, since the slit is opened and the surface sheet is separated from the absorber to cause absorption inhibition, excretion fluid that does not smoothly move to the absorber remains on the surface sheet, giving the wearer a feeling of moisture, or liquid pooling It was found that there was a disadvantage that the liquid flowed on the surface of the surface sheet and the liquid easily leaked.
Patent Document 1 discloses a slit formed in the absorbent body, and a slit formed along the longitudinal direction of the absorbent body and a slit formed along the width direction are separately disclosed. The slit along the direction is continuously formed over substantially the entire length of the absorber. Even if the absorbent body is provided with slits along the longitudinal direction, wrinkles extending in the longitudinal direction of the absorbent article are likely to occur, and the wrinkles may cause the wearer to feel uncomfortable or cause leakage. is there.
The technique of patent document 2 is a technique which reinforces a low-rigidity part with a surface sheet, and can maintain the intensity | strength of a liquid absorption layer. Patent Document 2 does not describe a method for preventing inconvenience due to the opening of the slit while enhancing workability and wearing feeling when fixing using the wing portion.

Therefore, the present invention relates to an absorbent article that can solve the problems of the prior art.

The present invention comprises a liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body. An excretory part facing part disposed opposite to the excretion part, a front part disposed on the abdomen side of the wearer from the excretion part facing part, and a rear part disposed on the back side of the wearer from the excretion part facing part; The present invention relates to an absorbent article having a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular thereto. The said absorbent article has a pair of wing part extended in the outward of a horizontal direction from each side part along the vertical direction of the excretion part opposing part. The absorber has an excretion part slit region formed in a state in which longitudinal slits along the longitudinal direction are dispersed in both the longitudinal direction and the lateral direction in the excretion part facing part, and the excretion part slit A central slit region is arranged in a state where a plurality of the vertical slits are dispersed in the central part in the horizontal direction and the vertical direction in the region. The absorbent main body is formed with longitudinal grooves in which the top sheet and the absorber are coupled to each other on both the left and right outer sides of the central slit region. The absorber includes a vertical slit having a portion overlapping with the vertical groove and a vertical slit positioned outward from the vertical groove on both the left and right outer sides of the central slit region.

Fig.1 (a) is a top view which shows the skin opposing surface side (surface sheet side) of the sanitary napkin which is one Embodiment of the absorbent article of this invention, FIG.1 (b) is the sanitary napkin. It is an extraction top view which shows only this absorber. FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. FIG. 3 is a plan view showing the positional relationship between the vertical slits and the vertical and horizontal grooves in the absorbent body of the sanitary napkin shown in FIG. FIG. 4 is a partially enlarged plan view of the absorbent body showing a preferred arrangement of the vertical slits in the excretory part slit region. FIG. 5 is a partially enlarged plan view of the absorbent body showing another arrangement of the vertical slits in the excretory part slit region. FIG. 6 is an enlarged plan view showing a preferable configuration of the vertical groove, the front horizontal groove, and the rear horizontal groove. 7 (a) to 7 (d) are schematic cross-sectional views of an auxiliary absorbent body showing another example of how to fold the absorbent sheet. FIG. 8A and FIG. 8B are partially enlarged schematic plan views of the absorbent body showing another example of the arrangement of the longitudinal slits of the absorbent body that can be employed in the present invention.

Detailed Description of the Invention

Hereinafter, the absorbent article of the present invention will be described with reference to the drawings based on a sanitary napkin which is a preferred embodiment thereof. As shown in FIGS. 1 and 2, the napkin 1 of the present embodiment includes a liquid-retaining absorbent body 4, a surface sheet 2 disposed on the skin-facing surface side of the absorbent body 4, and a non-skin of the absorbent body 4. It has an absorptive main body 5 having a back sheet 3 arranged on the opposite surface side, and has a longitudinal direction X corresponding to the wearer's front-rear direction and a transverse direction Y orthogonal thereto.

In addition, in this specification, a skin opposing surface is a surface which faces a wearer's skin side at the time of wear of an absorbent article in the absorbent article or its structural member (for example, absorbent main body 5), and is a non-skin opposing surface Is the surface of the absorbent article or its component that is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn. Further, the longitudinal direction X coincides with the longitudinal direction of the absorbent article (absorbent body), and the lateral direction Y coincides with the width direction (direction orthogonal to the longitudinal direction) of the absorbent article (absorbent body).

The absorptive main body 5 is disposed on the abdomen (front side) of the wearer relative to the excretion part facing part B disposed opposite to the wearer's liquid excretion part (such as the vaginal opening) when worn and the excretion part facing part B when worn. The front portion A and the rear portion C arranged on the back side (rear side) of the wearer rather than the excretory portion facing portion B at the time of wearing are provided in the vertical direction X.

In addition to the absorbent main body 5, the napkin 1 further includes a pair of wing portions 7, 7 extending outward in the lateral direction Y from both side portions along the vertical direction X of the excretory portion facing portion B of the absorbent main body 5. have.

In the absorbent article of the present invention, the excretory part-facing part is a region having a wing part in the longitudinal direction of the absorbent article (longitudinal direction of the absorbent article, X direction in the drawing) (one side in the longitudinal direction of the wing part). The region sandwiched between the base of the other side and the base of the other side).

As shown in FIG. 2, the top sheet 2 covers the whole area of the skin-facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4. On the other hand, the back sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 to be described later. A side flap portion 6 is also formed. The back sheet 3 and the side sheet 10 are joined to each other by known joining means such as an adhesive, heat seal, ultrasonic seal, and the like at the extended portions from both side edges along the longitudinal direction X of the absorber 4. The top sheet 2 and the back sheet 3 may be bonded to the absorber 4 with an adhesive.

The absorbent body 4 in the present embodiment is composed of a laminate of absorbent sheets 401 to 403 as shown in FIG. 2, and has a multilayer part 42 in the excretory part facing part B as shown in FIGS. ing. As shown in FIG. 2, the multilayer part 42 is a part where the number of laminated absorbent sheets constituting the absorbent body 4 is larger than the part positioned around the absorbent sheet. The multilayer part 42 in this embodiment is thicker than the part located in the circumference | surroundings, and forms the protruding part which protruded in the excretion part opposing part B to the surface sheet 2 side (skin opposing surface side of the napkin 1). Yes. The absorbent body 4 includes a main absorbent body 40 that forms the outer shape of the absorbent body 4, and an auxiliary absorbent body 41 that is smaller than the main absorbent body 40 that is arranged on a part of the main absorbent body 40. Yes. The main absorbent body 40 has a substantially rectangular shape with rounded corners in plan view, and extends from the front part A through the excretory part facing part B to the rear part C and has the same shape and size. 402, the auxiliary absorbent body 41 has a substantially rectangular shape in plan view, and is disposed from the excretory part facing part B to the rear part C in the vicinity thereof. The auxiliary absorbent body 41 is formed by folding a single absorbent sheet 403 into a two-layer structure, and is disposed between the two absorbent sheets 401 and 402 constituting the main absorbent body 40. By arranging the auxiliary absorber 41 on a part of the main absorber 40, the absorption capacity of a part of the absorber 4 can be increased easily and efficiently. Instead of arranging the auxiliary absorbent body 41 between the two absorbent sheets 401 and 402 constituting the main absorbent body 40, the auxiliary absorbent body 41 is disposed on the skin facing surface side of the upper absorbent sheet 401 constituting the main absorbent body 40. You may laminate | stack, and may laminate | stack on the non-skin opposing surface side of the lower absorbent sheet 402 which comprises the main absorber 40. FIG. Further, the absorbent sheets may not be joined, or may be adhered by a sparsely spread adhesive or the like.

As shown in FIG. 1 and FIG. 2, along the longitudinal direction X of the absorbent body 4 in plan view, on both side portions along the longitudinal direction X of the skin facing surface of the absorbent main body 5 (skin facing surface of the topsheet 2). A pair of side sheets 10, 10 are arranged over substantially the entire length in the longitudinal direction X of the absorbent main body 5 so as to overlap the left and right side portions. The pair of side sheets 10 and 10 are each a linear first joining line 11 located in the excretory part facing part B, and the longitudinal direction X of the first joining line 11 (front part A and rear part C). It joins to the absorptive main body 5 (surface sheet 2) with the linear 2nd joining line 12 located in this. The first joining line 11 has a curved shape that protrudes outward in the lateral direction Y in plan view, and the second joining line 12 has a linear shape (zigzag line shape) that extends in the longitudinal direction in plan view. ). The side sheet 10 is made of a water-repellent nonwoven fabric. Thus, when the side sheet 10 is joined to the skin facing surface (surface sheet 2) of the absorbent main body 5 by the joining lines 11 and 12, as shown in FIG. A space P defined by the side sheet 10 and the top sheet 2 is formed inward in the direction Y. Since the space P is open toward the center in the lateral direction Y of the absorbent main body 5, excretion fluid such as menstrual blood flowing outward from the center in the lateral direction Y seems to be accommodated in the space P. As a result, the leakage of excretory fluid is effectively prevented.

As shown in FIG. 1, the side flap portions 6 project greatly outward in the lateral direction Y at the excretory portion-facing portion B, whereby a pair of side flap portions 6 are provided on both the left and right sides along the longitudinal direction X of the absorbent main body 5. The wing portions 7, 7 are extended. Further, as shown in FIG. 1, the top sheet 2 and the back sheet 3 extend outward in the longitudinal direction X from the front end and the rear end in the longitudinal direction X of the absorbent body 4. The end seal portion is formed by bonding to each other by a known bonding means such as an agent, heat sealing, ultrasonic sealing or the like.

The wing part 7 is used by being folded back to the non-skin facing surface side of the crotch part of clothes such as shorts. As shown in FIG. 1, the wing portion 7 has a substantially trapezoidal shape in which a lower base (a side longer than the upper base) is positioned on the side of the absorbent main body 5 in a plan view. On the non-skin facing surface of the wing part 7, a wing part adhesive part (not shown) for fixing the wing part 7 (napkin 1) to clothing (not shown) such as shorts is formed. The wing portion 7 that is folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes can be adhered and fixed to the crotch portion by the adhesive portion. Moreover, the main body adhesion part (not shown) for fixing the absorptive main body 5 to clothes, such as shorts, is also formed in the non-skin opposing surface of the absorptive main body 5.

As shown in FIGS. 1 and 2, the surface sheet 2 and the absorbent body 4 are integrally recessed toward the back sheet 3 side on the skin facing surface of the absorbent main body 5 (skin facing surface of the top sheet 2). A linear groove is formed. The linear grooves are embossed grooves formed by integrally pressing the topsheet 2 and the absorbent body 4, and a pair of vertical grooves 51, 51 extending in the vertical direction X through the excretory part facing part B; It has a front lateral groove 52 and a second front lateral groove 53 that are located in the front part A and extend in the lateral direction Y, respectively, and a rear lateral groove 54 and a second rear lateral groove 55 that are located in the rear part C and extend in the lateral direction Y, respectively. Yes. A linear groove | channel can be formed in accordance with a conventional method by embossing, such as a pressing process (what is called embossing) with or without heat (what is called embossing), or ultrasonic embossing. In the linear groove, the surface sheet 2 and the absorbent body 4 are not shown in the figure, but are bonded (bonded) by an adhesive or by heat sealing. In the expression that the surface sheet 2 and the absorbent body 4 are bonded, another sheet such as a second sheet is interposed between the surface sheet 2 and the absorbent body 4, and the surface sheet and the other sheet. And the other sheet and the absorbent body 4 are joined (bonded).

Such a linear groove can prevent liquid leakage from the periphery of the napkin 1 by suppressing the diffusion of the liquid in the planar direction of the absorber 4. What is necessary is just to set the width | variety (length of the direction orthogonal to a length direction) and depth of a linear groove similarly to the linear groove in this kind of absorbent article. In addition, “linear” in the linear groove is not limited to a straight line in the plan view, but includes a curved line, and each line may be a continuous line or a broken line. For example, the linear groove may be composed of a row formed by a large number of discontinuous point embosses. In addition, the napkin 1 of this embodiment is formed left-right symmetrically with respect to the centerline (not shown) which bisects the absorptive main body 5 to the horizontal direction Y, as shown in FIG.

As shown in FIG. 1, a pair of vertical grooves 51 are formed across a center line (not shown) that bisects the absorbent main body 5 in the lateral direction Y. It is formed symmetrically with respect to the center line. The pair of longitudinal grooves 51, 51 extend not only from the excretory part facing part B but also from the excretion part facing part B to the front part A and the rear part C. In the excretion part facing part B, the multilayer part 42. The outer side of the horizontal direction Y extends in the vertical direction X. Moreover, in the napkin 1 of this embodiment, the vertical groove 51 has a curved shape that is recessed inward in the lateral direction from the front part A and the rear part C toward the excretory part facing part B. For this reason, the space | interval of a pair of vertical grooves 51 and 51 is the narrowest in the vertical direction center vicinity of the excretion part opposing part B, and has a part with the widest space | interval in the front part A and the back part B.

The front lateral groove 52 and the second front lateral groove 53 are curved in a convex shape toward the front end in the longitudinal direction X of the absorbent main body 5 in plan view, and the rear lateral groove 54 and the second rear lateral groove 55 are planar. As viewed, it is curved in a convex shape toward the rear end of the longitudinal direction X of the absorbent main body 5. The convex tops of the lateral grooves 52 to 55 are located at the center in the lateral direction Y of the absorbent main body 5. The pair of longitudinal grooves 51, 51, the second front lateral groove 53 and the second rear lateral groove 55 are connected at the end portions in the length direction thereof, and thereby ring-shaped in plan view on the skin facing surface of the absorbent main body 5. Grooves are formed.

As shown in FIGS. 1 and 3, the absorbent body 4 in the napkin 1 of the present embodiment has a vertical slit 43 along the vertical direction X distributed in the excretory part facing part B in both the vertical direction X and the horizontal direction Y. It has the excretion part slit area | region S formed in the state which carried out. The vertical slits 43 are formed in both the multilayer part 42 in the excretion part facing part B and in parts other than the multilayer part 42. Moreover, the excretion part slit area | region S covers not only the excretion part opposing part B but a part of front part A and a part of back part C. FIG.

The vertical slit 43 is formed by cutting the absorber 4 in the thickness direction, and is formed from a cut having substantially no width, or preferably 1.0 mm or less. It is a narrow space. When the vertical slit 43 has a width, the width means the length of the vertical slit 43 in a direction orthogonal to the direction in which the vertical slit 43 extends.

As shown in FIG. 2, the vertical slit 43 preferably penetrates the laminated body of absorbent sheets constituting the absorbent body 4. The vertical slit 43 is not formed in the top sheet 2 and the back sheet 3 disposed above and below the absorbent body 4, and is a second made of a nonwoven fabric that may be disposed between the top sheet 2 and the absorbent body 4. It is preferably not formed on a sheet (not shown).

Further, the absorbent body 4 in the napkin 1 of the present embodiment has a central slit region S1 arranged in a state where a plurality of vertical slits 43 are dispersed in the central portion of the excretory portion slit region S in the horizontal direction Y and the vertical direction X. is doing. The central slit region S <b> 1 is a region located between the pair of longitudinal grooves 51, 51 in the lateral direction Y and located between the front lateral groove 52 and the rear lateral groove 54 in the longitudinal direction X. In other words, the vertical grooves 51, 51 are positioned on the left and right outer sides of the central slit region S1, and the front horizontal groove 52 and the rear horizontal groove 54 are positioned on the front and rear outer sides. In the present embodiment, the central slit region S1 is in the same range as the multilayer portion 42. As shown in FIG. 3, the front lateral groove 52 in the present embodiment is located in the front part A, and the rear lateral groove 54 is located in the rear part C. Further, the front lateral groove 52 is located in front of the front end of the multilayer part 42, and the rear lateral groove 54 is located in the rear of the rear end of the multilayer part 42.

Although arrangement | positioning of the vertical slit 43 in the excretion part slit area | region S will not be restrict | limited especially if the vertical slit 43 is the arrangement | positioning disperse | distributed to both the vertical direction X and the width direction Y, as shown in FIG.1 (b). In addition, a plurality of vertical rows L formed of a plurality of vertical slits 43 arranged in series along the vertical direction X of the napkin 1 (absorbent article) are formed in the horizontal direction Y, and in the vertical columns adjacent to each other in the horizontal direction. An arrangement in which the positions of the vertical slits 43 in the vertical direction X do not coincide is preferable.

In FIG. 4, the example of the preferable arrangement | positioning of the vertical slit in the excretion part slit area | region S was shown. It is preferable that four or more slits are dispersedly arranged in the central slit region S1.
In the arrangement shown in FIGS. 4A and 4B, a plurality of slit rows R <b> 1 and R <b> 2 are formed in the longitudinal direction X of the napkin 1. ing. In FIG. 4, a slit row R1 composed of two vertical slits 43 spaced apart in the horizontal direction Y and a slit row R2 composed of three vertical slits 43 spaced apart in the horizontal direction Y are alternately arranged in the vertical direction X. Although the example formed is shown, at least two slit rows composed of two vertical slits separated in the horizontal direction Y are formed in the vertical direction X in the central slit region S1 in the present invention. preferable. In the central slit region S1, three or more slit rows are preferably formed in the longitudinal direction X, more preferably four rows or more, and even more preferably five rows or more. Moreover, the number of the longitudinal slits spaced apart in the horizontal direction X included in each slit row is preferably 2 or more, and more preferably 3 or more.
In the longitudinal direction X of the excretion part slit region S, in addition to the slit rows included in the central slit region S1, the longitudinal direction X of the central slit region S1 may have one row or two or more slit rows. preferable.

In the example of the preferred arrangement of the vertical slits shown in FIG. 4, there is no interval P between the slit rows adjacent in the vertical direction X of the napkin 1. That is, the interval P as shown in FIG. 5A is not provided between two slit rows R1 and R2 adjacent in the vertical direction X. In the expression that there is no interval P between adjacent slit rows, as shown in FIG. 4A, the positions of the ends of the slits 43 of the adjacent slit rows coincide with each other, as shown in FIG. As shown in b), the case where adjacent slit rows partially overlap in the vertical direction X is included. As shown in FIG. 4 (b), when two slit rows are arranged in the vertical direction X with a part of each other overlapping, the overlapping length L1 is the length of the vertical slits constituting the slit row. It is preferably 20% or less of the length L2 in the same direction X, and preferably 10% or less.

In the example of the preferred arrangement of the vertical slits shown in FIG. 4, the positions of the slits in the slit rows adjacent in the vertical direction X of the napkin 1 are shifted in the horizontal direction Y of the absorbent article. As shown in FIGS. 4A and 4B, the vertical slit 43 in the two slit rows R1 and R2 adjacent in the vertical direction X is the slit 43 of one slit row R1 and the other slit row R2. However, the slits 43 of one slit row R1 may be formed so as to be biased to one side between the slits 43 of the other slit row R2. . FIG. 5B is a diagram illustrating an example in which the positions of the slits of the slit rows R1 and R2 adjacent in the vertical direction X are not shifted in the horizontal direction Y.

In addition, when providing the space | interval P between the slit row | line | columns adjacent to the vertical direction X of the napkin 1 like the example shown to Fig.5 (a), the space | interval P is the vertical direction X of the vertical slit 43 which comprises a slit row | line | column. The length is preferably 50% or less of the length L2, and more preferably 35% or less. Further, it is preferably 5% or more, and more preferably 10% or more.

As shown in FIGS. 1 and 3, the absorbent body 4 of the napkin 1 according to the present embodiment includes longitudinal grooves 51 on both side portions of the excretory portion slit region S, more specifically, on both the left and right outer sides of the central slit region S1. A plurality of vertical slits 43a to 43e having overlapping portions are provided. Specifically, there are slits 43a and 43c that overlap with the vertical groove 51 over almost the entire length, and slits 43b, 43d, and 43e that partially overlap with the vertical groove 51. More specifically, when the vertical groove 51 is formed in a curved shape having a plurality of curvatures as in the present embodiment, the curved portion of the vertical groove 51 is slit like a slit 43a in a portion with a large curvature. The longitudinal direction of the longitudinal groove 51 and the longitudinal direction of the slit are substantially the same as the slit 43c in a portion having a small curvature. The slits overlap each other over the entire length of the slit.

Further, the absorbent body 4 of the napkin 1 of the present embodiment is located on the left and right outer sides of the central slit region S1, respectively, on the outer sides of the vertical grooves 51, as shown in FIGS. Has vertical slits 43f and 43g that do not overlap. Further, a vertical slit 43 h that intersects the front lateral groove 52 in front of the central slit region S 1 in the longitudinal direction of the napkin 1 and a longitudinal slit 43 i that intersects the rear lateral groove 54 in the rear of the central slit region S 1 in the longitudinal direction of the napkin 1. have.
By arranging the slits overlapping with the vertical grooves 51, the openings on both the slits outside the vertical grooves 51 and the slits inside the vertical grooves 51 (slits in the central slit region S1) in the lateral direction Y of the napkin 1 can be appropriately set. Can be suppressed. Further, the slit overlapping with the vertical groove 51 suppresses the influence of the twist generated in the area outside the vertical groove 51 to the area inside the vertical groove 51, thereby improving the flexibility of the central slit area S 1, It is possible to maintain the ease with which the article fits into the body. On the other hand, according to the said structure, both the fitting property of the both sides along the vertical direction X of the napkin 1 and the operativity of a wing part can be improved. From the viewpoint of ensuring these effects, the longitudinal slit 43 and the longitudinal groove 51 are preferably partially overlapped rather than overlapping the entire length of the slit. From that point, the vertical groove 51 in the central slit region S1 has a wavy shape having a curved portion and a bent portion and a gentle inclined portion as shown in FIG. 3 rather than a linear shape parallel to the vertical slit 43. The groove shape is good.

According to the napkin 1 of the present embodiment, the absorbent body 4 is formed in the excretory part facing part B in a state in which a plurality of vertical slits 43 along the vertical direction are dispersed in both the vertical direction X and the horizontal direction Y. Since it has the excretion part slit area | region S and it has the vertical slits 43f and 43g which are located outside the position of the vertical grooves 51 and 51 in the both sides of the absorber 4 and do not overlap with the vertical groove 51, it is a wing part When 7 and 7 are fixed so as to be wrapped around the crotch portion of clothing such as shorts, the side portions of the absorbent body 4 are flexibly deformed by the vertical slits of the respective portions. Excellent workability. At this time, since the vertical groove 51 is located on the inner side of the vertical slits 43f and 43g, the rigidity thereof can improve the ease of deformation at the slit portion, and the deformation at other portions can be suppressed. Further, since the vertical slits 43a to 43e overlapping the vertical groove 51 are provided on both sides of the central slit region S1, the absorber 4 is easily deformed even in the portion having the vertical groove 51 in the horizontal direction Y. The operability when 7 is attached to a crotch part such as shorts is further excellent. In particular, in the excretory part facing part B, as shown in FIG. 3, the longitudinal groove 51 has an inwardly convex curved shape, and the wings 7 and 7 formed by the longitudinal slits 43 f and 43 g that do not overlap the longitudinal groove 51 It is preferable because operability is improved.

Moreover, in the napkin 1 of this embodiment, it has the vertical slits 43h and 43i which cross | intersect the front horizontal groove 52 or the back horizontal groove 54 before and behind central slit area | region S1, and also the vertical groove 51 on both sides of central slit area S1. Since the absorbent body 4 has the overlapping vertical slits 43a to 43e, the absorber 4 is easily deformed even in the part having the front horizontal groove 52 and the rear horizontal groove 54 in the vertical direction X and the part having the vertical groove 51 in the horizontal direction Y. The operability when the wings 7, 7 are attached to a crotch portion such as shorts is further improved. Moreover, such a structure can also effectively prevent the side of the absorbent body 4 from being twisted, and the napkin 1 of the present embodiment is also excellent in wearing feeling. On the other hand, when there is no vertical slit outside the vertical grooves 51, 51, the absorber 4 is greatly deformed at the position of the vertical groove 51, and the side of the absorber 4 is likely to be twisted.
The excretion part slit area S may extend from the excretion part facing part B to at least one of the front part A and the rear part C, and the excretion part slit area S is a part located in the front part A and the rear part C. It is also preferable to have a vertical slit overlapping the vertical groove 51.

Further, in the napkin 1 of the present embodiment, the vertical slits 43 are arranged at positions of the front horizontal groove 52, the rear horizontal groove 54, and the vertical groove 51 so as to intersect or partially or entirely overlap each other. Therefore, even if tension is applied to the napkin 1 in the lateral direction Y, the opening of these slits is suppressed by the fact that the top sheet 2 or the second sheet disposed below it is bonded to both sides of each slit. The Moreover, the opening of the vertical slits 43h and 43i intersecting with the front horizontal groove 52 and the rear horizontal groove 54 is suppressed, so that the opening of the vertical slit 43 located in the central slit region S1 is also suppressed to some extent. Therefore, it is possible to prevent the inhibition of absorption that is likely to occur when the vertical slits of each part are opened, and it is also possible to prevent the wearer from feeling wet or easily leaking liquid due to the liquid remaining on the top sheet. The

From the viewpoint of obtaining the above-described effects more reliably, the absorber 4 preferably has one or more of the following configurations.
The length L2 (see FIG. 4) of the vertical slit 43 in the excretory part slit region S is preferably 10 mm or more, more preferably 15 mm or more, preferably 35 mm or less, more preferably 25 mm or less, The thickness is preferably 10 to 35 mm, more preferably 15 to 25 mm.
The interval L5 (see FIG. 4) of the vertical slits 43 in the same slit row in the excretory part slit region S is preferably 3 mm or more, more preferably 7 mm or more, preferably 20 mm or less, more preferably 15 mm or less, Moreover, Preferably they are 3 mm or more and 20 mm or less, More preferably, they are 7 mm or more and 15 mm or less.

The length L4 (see FIG. 1) in the lateral direction Y of the excretory part slit region S is preferably 30% or more, more preferably 40% or more of the length in the same direction Y of the absorbent body 4 in the excretion part facing part B. In addition, it is preferably 85% or less, more preferably 75% or less. The length L4 in the lateral direction Y of the excretory part slit region S is preferably 30 mm or more, more preferably 40 mm or more, and preferably 55 mm or less, more preferably 45 mm or less.
In FIG. 1B, the excretion part slit region S is prevented from being difficult to see because the vertical slit 43 and the alternate long and short dash line indicating the excretion part slit region S overlap in both the vertical direction X and the horizontal direction Y. Therefore, in other words, it is shown as a range slightly wider than the range in which the vertical slits 43 are distributed from the viewpoint of easy viewing. However, the excretion part slit region S in the present invention is a range in which the vertical slits 43 are distributed, and the length L4 in the horizontal direction Y is the vertical length located at both ends in the horizontal direction Y as shown in FIG. This is the distance between the outer edges of the slits 44.

In each of the outer sides of the central slit region S1, the number of the vertical slits 43 that overlap with the vertical grooves 51 in whole or in part may be one, but it is preferably a plurality, and more preferably three or more. preferable. Moreover, it is preferable that the absorber 4 has a vertical slit having a portion that overlaps the vertical groove 51 and a portion that does not overlap as a vertical slit that overlaps the vertical groove 51 in terms of achieving both operability and absorbability of the wing.
Further, the number of vertical slits positioned outward from the vertical groove 51 may be one on each of both outer sides of the central slit region S1, but it is preferable that the number is a plurality. The longitudinal slits 43f and 43g located outward from the longitudinal groove 51 are formed in a region between the article inner end of the side sheet 10 and the longitudinal groove 51 illustrated in FIG. It is preferable in terms of increase.
Further, the number of the vertical slits 43h intersecting with the front lateral groove 52 and the number of the longitudinal slits 43i intersecting with the rear lateral groove 54 may each be one, but a plurality is preferable, and three or more are further preferable. preferable. In this case, it is preferable that one or more vertical slits 43h and 43i intersecting the horizontal grooves 52 and 54 are present on both sides in the longitudinal direction of the horizontal groove because the twist suppressing effect is high. Moreover, it is preferable that the front horizontal groove 52 and the rear horizontal groove 54 intersect the vertical slit 43h or the vertical slit 43i in a cross shape instead of a T shape.

As shown in FIG. 1B, the absorbent body 4 of the napkin 1 of the present embodiment is surrounded by an annular non-slit region N where no slit exists, around the excretory portion slit region S.
By surrounding the excretion part slit region S with the non-slit region N, it is possible to reliably prevent liquid leakage due to liquid bleeding along the vertical slit.

Further, in the napkin 1 of the present embodiment, as shown in FIG. 3, the central slit region S1 is formed in the multilayer portion 42, and the front horizontal groove 52 and the vertical slit 43i intersected by the vertical slit 43h intersect. The rear lateral grooves 54 are configured such that the lengths L6 and L7 in the lateral direction Y are shorter than the length L8 in the lateral direction Y of the multilayer portion 42, respectively.
By making the length L6 of the front lateral groove 52 and the length L7 of the rear lateral groove 54 shorter than the length L8 of the multilayer portion 42 in the lateral direction Y, the lateral grooves 52, 54 are formed at the center in the width direction of the absorber 4. While maintaining the vertical slits 43h, 43i intersecting with each other and the opening of the vertical slit in the central slit region S1 located between the horizontal grooves 52, 54, the side fit can be maintained well. Since the multilayer part 42 is opposed to the excretion part, it is preferable that the excretion liquid is absorbed into the absorber as quickly as possible. Therefore, the horizontal grooves 52 and 54 are formed so as to overlap the vertical slits 43h and 43i at the front and rear of the multilayer portion so that the slits on the multilayer portion 42 are not opened too much and absorption inhibition occurs. After excreted liquid is once absorbed by the topsheet, it penetrates into the absorber, but if it is too open, the number of parts that are not adhered to the topsheet and the absorbent will increase, so the fluid will transfer from the excreted liquid to the absorber. Does not go smoothly. By making the length L7 of the lateral groove 54 shorter than the length L8 in the lateral direction Y of the multilayer portion 42, the user can hardly feel the hardness due to the lateral grooves 52, 54, and can be attached to the absorber side portion other than the multilayer portion. The opening of the formed vertical slit is difficult to be suppressed. As a result, there is no discomfort during use without interfering with the operability and ease of wearing of the wing.

The length L6 of the front lateral groove 52 and the length L7 of the rear lateral groove 54 are preferably 90% or less, more preferably 85% or less, respectively, with respect to the length L8 of the multilayer portion 42 in the lateral direction Y. Preferably, it is 50% or more, more preferably 60% or more.
When the length L8 of the multilayer part 42 is not constant in the vertical direction X, the length L8 in the horizontal direction Y of the multilayer part 42 is the length at the smallest length in the product width direction.

Moreover, in the napkin 1 of this embodiment, as shown in FIG.1 and FIG.3, a pair of vertical groove 51,51 is respectively multilayer part 42 side outward from the both-sides edge of the vertical direction X of the multilayer part 42, respectively. It is formed in a shape that is convexly curved toward.
In order to improve the fit to the wearer of the napkin 1 or the absorbent body, the rigidity of the central portion in the transverse direction Y of the absorbent body 4 is set as the multilayer portion 42, and the rigidity of the portions forming the longitudinal grooves on both sides thereof is increased. However, if the distance between the multilayer part 42 and the vertical groove 51 is too large, the difference between the rigidity and the part between the multilayer part 42 and the vertical groove 51 tends to occur. On the other hand, the occurrence of such a twist can be prevented by forming the longitudinal groove 51 in a shape curved convexly toward the multilayer portion 42 as in the present embodiment.
The vertical groove 51 and the multilayer part 42 preferably have a separation distance of 7 mm or less, more preferably 5 mm or less, in the closest part of the excretion part facing part B.

FIG. 6 is a schematic enlarged plan view of an absorbent body showing a preferred configuration of the vertical groove 51, the front horizontal groove 52, and the rear horizontal groove 54. FIG. Each of the vertical groove 51, the front horizontal groove 52, and the rear horizontal groove 54 has a high compression portion 56 and a low compression portion 57 with a lower degree of compression in the groove, and the shape of each high compression portion 56 is The shape is long in the longitudinal direction of the groove. Further, the front lateral groove 52 and the rear lateral groove 54 have a width W wider than that of the longitudinal groove 51.
For the longitudinal groove 51, the shape of each high compression portion 56 is, for example, as shown in FIG. 6 and is long in the longitudinal direction of the groove, so that bending along the longitudinal direction of the napkin 1 can be easily induced. It is possible to improve the fit.
For the front lateral groove 52 and the rear lateral groove 54, the shape of each high compression portion 56 is, for example, as shown in FIG. Inconvenience due to the opening of the slit can be more reliably suppressed.
About the high compression part 56, the shape long in the longitudinal direction of a groove | channel means that the length L9 of the direction along a groove | channel is longer than the length L10 of the direction orthogonal to a groove | channel. Further, the low compression portion 57 may be a portion that is not directly pressed during embossing for forming each groove, and the high compression portion 56 has a long shape as shown in FIG. Things and shapes that are not long shapes such as dots may be alternately arranged.

Furthermore, since the width W of the front lateral groove 52 and the rear lateral groove 54 is wider than the width W of the longitudinal groove 51, not only the opening of the slit of the excretory part can be suppressed, but also the twisting of the excretory part can be prevented, and the operation of the wing is further improved. The advantageous effect that a sense of incongruity can be reduced while improving the performance is exhibited.

The absorbent body 4 of the napkin 1 of this embodiment has the multilayer part 42 in the excretion part opposing part B, as shown to Fig.1 (a) and FIG. 2, and the excretion part slit area | region S and center slit area | region S1 are as follows. It is formed in a region including the multilayer portion 42. Due to this, there are advantageous effects that the effect of preventing leakage can be further enhanced and fit that suits the body and movement can be obtained.

Although not shown, it is preferable that the napkin 1 further includes a second sheet between the absorbent body 4 and the top sheet 2. The second sheet is preferably a liquid-permeable fiber sheet whose constituent fiber is a synthetic fiber. When the second sheet is made of synthetic fibers, the liquid diffusibility can be kept low. The synthetic fiber constituting the second sheet is preferably a weakly hydrophilic fiber from the viewpoint of mechanical compatibility while keeping the diffusibility low. The second sheet is formed of fibers made of a resin such as polyester such as polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, or polyamide such as nylon-6 or nylon-66, or a mixture of two or more kinds. be able to. In addition, mixing mentioned here includes using 2 or more types of resin from which melting | fusing point differs as a core-sheath-type composite fiber and a side-by-side type composite fiber.

Since the second sheet is a sheet having high permeability and moderate diffusivity, the thickness is preferably 0.15 mm or more, and more preferably 0.2 mm or more. Moreover, it is preferable that it is 0.4 mm or less, and it is still more preferable that it is 0.3 mm or less. The thickness is measured under a 0.5 kPa load from the viewpoint of considering the wearing state.

As the second sheet, an air-through nonwoven fabric in which the intersecting points of the crossed synthetic fibers are joined by air-through heat fusion can be preferably used. In addition to the air-through nonwoven fabric, a point bond nonwoven fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric, or the like may be used. When the second sheet is an air-through nonwoven fabric, the basis weight is preferably 15 g / m ² or more and 40 g / m ² or less.

It is preferable that the space between the top sheet 2 and the second sheet and the space between the second sheet and the absorber 4 are partially fixed. Moreover, when there is no second sheet, it is preferable that the surface sheet 2 and the absorber 4 are partially fixed.
Thereby, both the moderate opening in a slit part and the adhesiveness of a surface sheet or a 2nd sheet | seat, and an absorber are attained. Moreover, also in parts other than a slit, the adhesiveness from the surface sheet 2 to the absorber 4 improves, and the transferability of the liquid from the surface sheet 2 to the absorber 4 improves. The adhesion between the top sheet 2 and the second sheet is improved, and the liquid is easily transferred.
Partially fixed means that there are fixed portions consisting of dots and lines, and the fixed portions are distributed over the entire sheet surface and do not need to be evenly distributed. Means no. The area of the fixing portion is preferably about 10% or more and 60% or less of the total area of the adherend sheet. Specifically, the topsheet 2 and the second sheet are partially fixed by applying an adhesive intermittently or intermittently heat-sealing. When the adhesive is applied intermittently, the adhesive is applied intermittently using a known means such as a slot coat gun, spirally applied using a spiral spray gun, or spray gun. The surface sheet 2 is applied in the form of a mist intermittently using a dot gun or in the form of dots using a dot gun to maintain the fluid permeability between the surface sheet 2 and the second sheet. And the second sheet are partially bonded. As the adhesive to be applied, for example, a hot melt adhesive is preferably used.

Examples of the hot melt adhesive include styrene and olefin. Styrene-based hot melt adhesives include styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), and styrene-ethylene-butylene-styrene copolymer that is a hydrogenated product of SBS. (SEBS) and blended hot melt adhesives in which two or more of these are blended can be used. Among these, from the viewpoint of easily balancing the tack force and the cohesive force, a blended hot melt adhesive of SIS and SBS or a blended hot melt adhesive of SIS and SEBS is particularly preferably used in the present invention. The application amount of the hot melt adhesive is preferably 3 g / m ² or more and 10 g / m ² or less.

When the formation material of each part in the napkin 1 is demonstrated, as the surface sheet 2 and the back surface sheet 3, various things conventionally used in the said technical field can be especially used without a restriction | limiting. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. Moreover, as the back sheet 3, a liquid-impermeable material or a water-repellent material can be used. As the liquid-impermeable material, a resin film, a resin film having fine pores and moisture permeability, a laminate material of a resin film and a nonwoven fabric, and the like can be used. A composite nonwoven fabric having a multilayer structure composed of bond, meltblown, spunbond, or the like, a spunbond nonwoven fabric, a heat bond nonwoven fabric, an air-through nonwoven fabric, or the like can be used.

As the absorbent sheets 401 to 403 constituting the absorbent body 4, the adhesive force generated in the wet water-absorbing polymer or a binder such as an adhesive or an adhesive fiber added separately is interposed between the constituent fibers or between the constituent fibers and the water absorption. A sheet formed by bonding with a functional polymer can be preferably used. Further, as the absorbent sheet, an absorbent sheet manufactured by the method described in JP-A-8-246395, pulverized pulp supplied on an air stream and a water-absorbing polymer are deposited, and then an adhesive (for example, acetic acid) is deposited. Dry sheets hardened with vinyl-based adhesives, PVA, etc.) Absorbent sheets obtained by spraying a superabsorbent polymer after applying a hot melt adhesive between paper and nonwoven fabric, spunbond or meltblown nonwoven fabric An absorbent sheet obtained by blending a superabsorbent polymer during the production process can be used. These absorptive sheets can be used as a sheet-like absorber by cutting one sheet into a predetermined shape. The thickness per absorbent sheet is preferably 0.1 mm or more, particularly 0.3 mm or more, and preferably 2 mm or less, particularly 1.5 mm or less. More specifically, it is preferably 0.1 mm or more and 2 mm or less, particularly preferably 0.3 mm or more and 1.5 mm or less.

The laminate of the absorbent sheet in the present invention may be a laminate obtained by laminating a plurality of single-sheet absorbent sheets, or folding a single absorbent sheet and bonding the layers to form a laminate. Things can be used. Further, such a laminate is sandwiched between two absorbent sheets or between layers of a laminate that is folded into two or more layers, or laminated on the skin facing surface side or the non-skin facing surface side of another absorbent sheet. It may be what you did. Also, the absorbent sheet can be folded in various ways. For example, the auxiliary absorbent body in the above embodiment is formed by folding the absorbent sheet 403 as shown in FIGS. 7 (a) to 7 (d). It may be one folded.

The absorber 4 has a thickness in the multilayer portion 42 of preferably 0.7 mm or more, more preferably 1 mm or more, preferably 5 mm or less, more preferably 4 mm or less, more specifically preferably It is 0.7 mm or more and 5 mm or less, More preferably, it is 1 mm or more and 4 mm or less. By making the thickness of the multilayer part 42 in such a range, it becomes easy to achieve both a good wearing feeling and high absorption performance in the excretory part facing part B where the multilayer part 42 is formed. Moreover, when the absorbent article is provided with a wing part like the napkin 1 of this embodiment, it becomes easy to suppress the twist of the absorber in an excretion part opposing part at the time of mounting | wearing. The thickness of the absorber other than the multilayer portion 42 is preferably 0.3 mm or more, more preferably 0.5 mm or more, preferably 3 mm or less, more preferably 2.5 mm or less, More specifically, it is preferably 0.3 mm or more and 3 mm or less, more preferably 0.5 mm or more and 2.5 mm or less. This range is preferable from the viewpoint of enhancing the high absorption performance and the ability to follow the wearer's movement.

Further, in the absorber 4, the difference in thickness (step) between the boundary between the middle and high portions 42 and the peripheral portion or the vicinity thereof is preferably 2 mm or less, and more preferably 1.5 mm or less. The purpose is to suppress the occurrence of twisting in the vicinity of the boundary between the middle-high portion 42 and the region where only the main absorber 40 in the peripheral portion exists in the excretory portion facing portion B. If this step is large, the napkin 1 tends to fill the gap due to the step when the napkin 1 follows the movement of the wearer during wearing. By setting within the range, the effect of suppressing the occurrence of twisting in the excretory part facing part B is enhanced. The thickness of each part of the absorber 4 described above is measured by the following method.

<Measurement method of absorber thickness>
The absorber, which is a measurement object, is placed in a horizontal place so as not to be wrinkled or bent, and the thickness under a load of 5 cN / cm ² is measured. A thickness meter PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.) Was used for measuring the thickness in the present invention. At this time, a circular plate or a square plate (acrylic plate having a thickness of about 5 mm) in plan view is disposed between the tip of the thickness meter and the measurement portion of the measurement object, and the load is 5 cN / cm ² . Adjust the size of the plate so that

Moreover, in order to form a slit in the absorbent body 4, the laminate of the absorbent sheet may be partially cut by a known cutting means, for example, a cutting blade extending in the circumferential direction on the circumferential surface of the roll, A cutting device including a plurality of cutter rolls dispersed in the circumferential direction and the axial length direction of the rolls and an anvil roll that receives the blades of the cutter rolls can be used.
Examples of the water-absorbing polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride). ) Copolymers and saponified products thereof, polyaspartic acid and the like. Moreover, it is preferable that any of the absorbent sheets constituting the absorbent body 4 is a water absorbent sheet containing a water absorbent polymer, but it does not contain a water absorbent sheet containing a water absorbent polymer and a water absorbent polymer. It is good also as a laminated body of the water absorptive sheet which comprises an absorber by combining a water absorptive sheet.

As the side sheet 10, various types conventionally used in the technical field can be used without particular limitation. For example, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. Can be used. Other materials include, for example, spunbond nonwoven fabrics, composite sheets of spunbond nonwoven fabric (S) and meltblown nonwoven fabric (M) (SM, SMS, SMMS, etc.), heat roll nonwoven fabrics, air-through nonwoven fabrics, etc. An aqueous (hydrophobic) non-woven fabric may be mentioned. In particular, it is preferable to use a water-repellent air-through non-woven fabric from the viewpoint of touch and prevention of lateral leakage.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment.
For example, the excretion part slit area S may be formed only in the excretion part facing part B, may extend from the excretion part facing part B to a part of the rear part C, or the excretion part facing part. From B, a part of the front part A and a part of the rear part C may be extended. Further, the number of laminated absorbent sheets in the multilayer part 42 may be two or three, or five or more instead of four. Further, the difference in the number of laminated absorbent sheets between the multilayer portion 42 and other portions may be one or three or more. In the linear groove in which the topsheet 2 and the absorber 4 are integrally recessed toward the backsheet 3 side, the front horizontal groove 53 and the vertical groove 51 and the rear horizontal groove 55 and the vertical groove 51 are spaced apart from each other. In other words, it is not necessary to form a ring-shaped portion in the longitudinal groove 51 to form a complete ring.

Further, the napkin 1 described above has five types of vertical slits 43a to 43e that are different from the vertical grooves 51 as vertical slits that overlap the vertical grooves 51. However, the absorbent article of the present invention has five types. Among the vertical slits 43a to 43e, the slit may have only one type, or may have only two types arbitrarily combined, only three types, or only four types.

FIG. 8A and FIG. 8B are partially enlarged schematic plan views of the absorbent body showing another example of the arrangement of the longitudinal slits of the absorbent body that can be employed in the present invention.
The absorbent body 4A shown in FIG. 8A includes a plurality of vertical slits having portions overlapping with the vertical grooves 51 on both sides of the excretory part-facing region S, more specifically, outward in both the left and right directions of the central slit region S1. 43a, 43a ′ and a longitudinal slit 43f positioned further outward than the longitudinal groove 51. The vertical slits 43 a and 43 a ′ are formed before and after a portion where the distance between the pair of vertical grooves 51 is minimum, and the substantially entire length of each of the vertical slits 43 a and 43 a ′ overlaps with the vertical groove 51.
The absorbent body 4B shown in FIG. 8 (b) has a plurality of vertical slits having portions overlapping with the vertical grooves 51 on both sides of the excretory part-facing region S, more specifically, outward in the left and right directions of the central slit region S1. 43e, 43a, 43e ′ and a vertical slit 43f positioned further outward than the vertical groove 51. The vertical slit 43 a almost overlaps with the vertical groove 51. The vertical slits 43e and 43e ′ are formed before and after the portion where the distance between the pair of vertical grooves 51 is minimized, and a part of each of the vertical slits 43e and 43e ′ overlaps the vertical groove 51.
Further, the absorbers 4A and 4B shown in FIGS. 8A and 8B both have a longitudinal slit 43h that intersects the front lateral groove 52 in front of the central slit region S1 in the longitudinal direction X. A vertical slit 43i intersecting with the rear lateral groove 54 is provided behind the central slit region S1.

Moreover, it replaces with what consists of an absorbent sheet as an absorber, and can also use a well-known arbitrary absorber. For example, it is also possible to use a fiber laminate such as fluff pulp, or an absorbent core made of a mixture of fibers and a water-absorbing polymer and coated with a liquid-permeable core wrap sheet. As the liquid-permeable core wrap sheet, water-permeable sheets such as paper such as tissue paper, various nonwoven fabrics, and apertured films can be used.
In addition to the sanitary napkin, the absorbent article of the present invention may be a panty liner (cage sheet), an incontinence pad, or the like.

In addition to the above-described embodiment of the present invention, the following additional notes (absorbent articles and the like) are disclosed.
<1> A liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body, and excreted by the wearer when worn An excretory part facing part disposed opposite to the part, a front part disposed on the abdomen side of the wearer from the excretion part facing part, and a rear part disposed on the back side of the wearer from the excretion part facing part. An absorbent article having a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular thereto, each laterally extending from each side along the longitudinal direction of the excretory part-facing part The absorber has a pair of wings extending outward, and the absorbent body has longitudinal slits dispersed in both the longitudinal direction and the lateral direction in the excretory part facing part. Having an excretion part slit region formed in a state, in the excretion part slit region The central portion in the horizontal direction and the vertical direction has a central slit region disposed in a state where a plurality of the vertical slits are dispersed, and the absorbent main body has the left and right outer sides of the central slit region, A longitudinal groove in which a surface sheet and the absorber are coupled to each other is formed, and the absorber includes a longitudinal slit having a portion overlapping the longitudinal groove on each of the left and right outer sides of the central slit region, and the longitudinal groove. An absorbent article having a longitudinal slit located outward.
<2> In front of the central slit region in the absorbent main body, a front lateral groove in which the topsheet and the absorber are coupled is formed to extend in a direction intersecting the longitudinal direction, and the absorber The absorbent article according to <1>, further including a longitudinal slit that intersects the front lateral groove in front of the central slit region in the longitudinal direction.
<3> Behind the central slit region in the absorbent main body, a rear lateral groove in which the top sheet and the absorber are coupled is formed to extend in a direction intersecting the longitudinal direction, and the absorber Is the absorbent article according to <2>, wherein the longitudinal slit intersects the front lateral groove or the rear lateral groove.
<4> The absorbent article according to <3>, wherein the absorbent body includes the vertical slit that intersects the front lateral groove and the vertical slit that intersects the rear lateral groove.

<5> The absorbent body is composed of a laminate of absorbent sheets, and has a multilayer portion in the excretory portion-facing portion, and the multilayer portion has a larger number of laminated absorbent sheets than a portion located around the multilayer portion. The central slit region is formed in the multilayer portion, and the front lateral groove and the rear lateral groove each have a lateral length shorter than the lateral length of the multilayer portion. The absorbent article according to any one of <1> to <4>.
<6> The vertical groove, the front horizontal groove, and the rear horizontal groove each have a high compression portion and a low compression portion with a lower degree of compression in the groove, and the shape of each high compression portion is The vertical groove has a shape in which the length in the vertical direction is longer than the length in the horizontal direction, and the front horizontal groove and the rear horizontal groove have a shape in which the horizontal length is longer than the length in the vertical direction. The absorbent article according to any one of <5>.
<7> The absorbent article according to any one of <1> to <6>, wherein the front lateral groove and the rear lateral groove are each wider than the longitudinal groove.
<8> The absorbent article according to any one of <1> to <7>, wherein the absorbent body is surrounded by an annular non-slit region where no slit is present around the excretory slit region. .
<9> The longitudinal groove has a curved shape that is recessed inward in the lateral direction from the front portion and the rear portion toward the excretory portion-facing portion, and the interval between the pair of longitudinal grooves is the excretion portion. The absorbent article according to any one of <1> to <8>, wherein the absorbent article has the narrowest portion in the vicinity of the center in the longitudinal direction of the facing portion and the widest portion in the front portion and the rear portion.
<10> The absorbent article according to any one of the above items <1> to <9>, wherein the longitudinal groove has a curved shape having a plurality of curvatures.
<11> The absorbent body is made of a laminate of absorbent sheets, and has a multi-layer portion at the excretory portion facing portion, and the multi-layer portion has a larger number of laminated absorbent sheets than a portion located around the multi-layer portion. The central slit region is formed in the multilayer portion, and the pair of longitudinal grooves are curved outwardly from both side edges of the multilayer portion and projecting toward the multilayer portion side. The absorbent article according to any one of <1> to <10>, which is formed.
<12> The <1> to <11, wherein the vertical slit having a portion overlapping with the vertical groove includes a mixture of the vertical groove and the slit that overlaps with the entire length of the vertical groove and a portion of the vertical groove and the slit. > Any one of>.

<13> The absorber includes a main absorber that forms an outer shape of the absorber, and an auxiliary absorber that is smaller than the main absorber that is disposed so as to overlap a part of the main absorber. The absorbent article according to any one of 1> to <12>.
<14> The absorbent body is a structure in which one absorbent sheet constituting the auxiliary absorbent body is folded and disposed between two absorbent sheets constituting the main absorbent body. 13> The absorbent article of description.
<15> The absorbent article according to <14>, wherein one absorbent sheet constituting the main absorbent body is folded into two absorbent sheets.
<16> The absorbent article according to <14> or <15>, wherein the absorbent sheet has a structure in which constituent fibers are bonded to each other.
<17> The absorbent sheet is formed between the constituent fibers or between the constituent fibers and the water-absorbing polymer through the adhesive force generated in the water-absorbing polymer in a wet state or a binder such as an adhesive or an adhesive fiber added separately. The absorbent article according to any one of <14> to <16>, wherein the absorbent article is bonded to form a sheet.
<18> The absorbent article according to any one of <14> to <17>, wherein the thickness per sheet of the absorbent sheet is 0.1 mm or more and 2 mm or less.
<19> A pair of side sheets is provided on both side portions along the longitudinal direction X of the skin of the absorbent main body so as to overlap both left and right side portions along the longitudinal direction X of the absorbent body in plan view. The pair of side seats are arranged over substantially the entire length in the longitudinal direction X, and the pair of side sheets are each a linear first joining line located in the excretory part facing portion, and the longitudinal direction X of the first joining line. It is joined to the absorptive main body with the linear 2nd joint line located in the front and back, and the side sheet and the surface sheet are inwardly inward of the first joint line and the second joint line. The absorbent article according to any one of the above items <1> to <18>, wherein a space portion defined by 1 is formed.
<20> The absorbent article according to any one of <1> to <19>, wherein the length of the vertical slit in the excretion part slit region is 10 mm or more and 35 mm or less.
<21> In the excretion part slit region, a plurality of slit rows composed of two or more vertical slits arranged at intervals in the horizontal direction are arranged in the vertical direction, and the vertical slits in the same slit row are arranged. The absorbent article according to any one of <1> to <20>, wherein the interval is 3 mm or more and 20 mm or less.
<22> The length in the lateral direction of the excretory part slit region is 30% to 85% of the length in the same direction of the absorber in the excretory part facing part. The absorbent article of any one.

<23> The absorbent article according to any one of <1> to <22>, wherein a length in a lateral direction of the excretory part slit region is 30 mm to 55 mm.
<24> The absorbent body is composed of a laminate of absorbent sheets, and has a multi-layer part in the excretory part facing part, and the longitudinal groove and the multilayer part are the closest parts of both in the excretion part facing part. The absorbent article according to any one of the above items <1> to <23>, wherein a separation distance is 7 mm or less.
<25> The absorbent body includes a laminate of absorbent sheets, and has a multilayer portion at the excretory portion-facing portion, and the multilayer portion of the absorbent body has a thickness of 0.7 mm to 5 mm. The absorbent article according to any one of <24>.
<26> The absorbent body is composed of a laminate of absorbent sheets, has a multi-layer part in the excretory part facing part, and the thickness of the absorbent part other than the multi-layer part is 0.3 mm or more and 3 mm or less. The absorbent article according to any one of 1> to <25>.
<27> The absorbent body is composed of a laminate of absorbent sheets, and has a multilayer part in the excretory part facing part, and the thickness difference near the boundary between the thickness of the multilayer part and the outer part is 2 mm or less. The absorbent article according to any one of <1> to <26>, wherein
<28> The absorbent article according to any one of <1> to <27>, wherein the absorbent article is a sanitary napkin.

According to the absorbent article of the present invention, it is possible to improve workability and wearing feeling when fixing using the wing portion, and it is possible to prevent inconveniences such as wet feeling and liquid leakage due to the opening of the slit.

Claims (28)

1. A liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body, facing the excretory part of the wearer when worn An absorptive having an excretion part facing part disposed, a front part disposed on the abdomen side of the wearer from the excretion part facing part, and a rear part disposed on the back side of the wearer from the excretion part facing part An absorbent article comprising a main body and having a longitudinal direction corresponding to the wearer's front-rear direction and a transverse direction perpendicular thereto,
   It has a pair of wings extending outward in the lateral direction from each side along the longitudinal direction of the excretory part facing part,
   The absorber has an excretion part slit region formed in a state in which longitudinal slits along the longitudinal direction are dispersed in both the longitudinal direction and the lateral direction in the excretion part facing part, and the excretion part slit In the central part of the horizontal direction and the vertical direction in the region, it has a central slit region arranged in a state where a plurality of the vertical slits are dispersed,
   The absorbent main body has a longitudinal groove formed between the top sheet and the absorber on each of the left and right outer sides of the central slit region,
   The absorbent article has a longitudinal slit having a portion overlapping with the longitudinal groove and a longitudinal slit positioned outward from the longitudinal groove on both left and right outer sides of the central slit region.
2. In front of the central slit region in the absorbent main body, a front lateral groove in which the space between the top sheet and the absorbent body is extended in a direction intersecting the longitudinal direction, and the absorbent body is The absorbent article of Claim 1 which has a vertical slit which cross | intersects the said front horizontal groove ahead of the said center slit area | region in the vertical direction.
3. Behind the central slit region in the absorbent main body, a rear lateral groove in which the surface sheet and the absorber are coupled is formed to extend in a direction intersecting the longitudinal direction, and the absorber is The absorbent article of Claim 2 which has the said vertical slit which cross | intersects a front horizontal groove or the said back horizontal groove.
4. The absorbent article according to claim 3, wherein the absorbent body has the longitudinal slit intersecting with the front lateral groove and the longitudinal slit intersecting with the rear lateral groove.
5. The absorbent body is composed of a laminate of absorbent sheets, and has a multi-layer portion in the excretory portion-facing portion, and the multi-layer portion is a portion where the number of laminated absorbent sheets is larger than the portion positioned around the multi-layer portion. The central slit region is formed in the multilayer portion, and the front lateral groove and the rear lateral groove each have a lateral length shorter than the lateral length of the multilayer portion. Or the absorbent article of 4.
6. The vertical groove, the front horizontal groove, and the rear horizontal groove each have a high compression portion and a low compression portion with a lower degree of compression in the groove, and the shape of each high compression portion is about the vertical groove. The length of the longitudinal direction is longer than the length of the lateral direction, and the front lateral groove and the rear lateral groove have a lateral length longer than the length of the longitudinal direction. The absorbent article according to item 1.
7. The absorbent article according to any one of claims 4 to 6, wherein each of the front lateral groove and the rear lateral groove is wider than the longitudinal groove.
8. The absorbent article according to any one of claims 1 to 7, wherein the absorbent body is surrounded by an annular non-slit region where no slit exists, around the excretory part slit region.
9. The longitudinal groove has a curved shape that is recessed inward in the lateral direction from each of the front part and the rear part toward the excretory part opposing part, and the interval between the pair of longitudinal grooves is the distance between the excretory part opposing part. The absorbent article according to any one of claims 1 to 8, which has the narrowest portion in the vicinity of the center in the longitudinal direction and the widest portion in the front portion and the rear portion.
10. The absorbent article according to any one of claims 1 to 9, wherein the longitudinal groove is formed in a curved shape having a plurality of curvatures.
11. The absorbent body is composed of a laminate of absorbent sheets, and has a multi-layer portion in the excretory portion-facing portion, and the multi-layer portion is a portion where the number of laminated absorbent sheets is larger than the portion positioned around the multi-layer portion. The central slit region is formed in the multilayer portion, and the pair of longitudinal grooves are formed in a shape curved outwardly from both side edges of the multilayer portion so as to protrude toward the multilayer portion side. The absorbent article according to any one of claims 1 to 10.
12. 12. The vertical slit having a portion that overlaps the vertical groove includes a mixture of a vertical groove that overlaps with the entire length of the vertical groove and a slit and a portion that overlaps with the vertical groove and a part of the slit. Absorbent article as described in 1.
13. The absorbent body has a main absorbent body that forms the outer shape of the absorbent body, and an auxiliary absorbent body that is smaller than the main absorbent body that is arranged on a part of the main absorbent body. The absorbent article according to any one of the above.
14. The said absorber is the thing of the structure which folded the one absorbent sheet which comprises the said auxiliary | assistant absorber, and distribute | arranged between the two absorbent sheets which comprise a main absorber. Absorbent articles.
15. The absorbent article according to claim 14, wherein one absorbent sheet constituting the main absorbent body is folded into two absorbent sheets.
16. The absorbent article according to claim 14 or 15, wherein the absorbent sheet has a structure in which constituent fibers are bonded to each other.
17. The absorbent sheet is formed by bonding between constituent fibers or between constituent fibers and the water-absorbing polymer via adhesive force generated in the water-absorbing polymer in a wet state or a binder such as an adhesive or adhesive fiber added separately. The absorbent article according to any one of claims 14 to 16, wherein the absorbent article is in the form of a sheet.
18. The absorbent article according to any one of claims 14 to 17, wherein a thickness per sheet of the absorbent sheet is 0.1 mm or more and 2 mm or less.
19. A pair of side sheets are vertically arranged on both sides of the absorbent main body facing the skin in the longitudinal direction X so as to overlap both left and right sides of the absorbent body in the longitudinal direction X in plan view. It is arranged over almost the entire length of direction X,
    Each of the pair of side sheets includes a linear first joint line located in the excretory part facing portion and a linear second joint line located in the longitudinal direction X of the first joint line. It is joined to the absorptive main body, and the space part defined by the side sheet and the surface sheet is formed inward in the transverse direction from the first joining line and the second joining line. The absorbent article according to any one of 1 to 18.
20. The absorbent article according to any one of claims 1 to 19, wherein a length of the vertical slit in the excretion part slit region is 10 mm or more and 35 mm or less.
21. In the excretion part slit region, a plurality of slit rows composed of two or more vertical slits arranged at intervals in the horizontal direction are arranged in the vertical direction, and the intervals between the vertical slits in the same slit row are: The absorbent article according to any one of claims 1 to 20, which is 3 mm or more and 20 mm or less.
22. The length in the lateral direction of the excretion part slit region is 30% or more and 85% or less of the length in the same direction of the absorber in the excretion part facing part. Absorbent articles.
23. The absorbent article according to any one of claims 1 to 22, wherein a length in a lateral direction of the excretory part slit region is 30 mm or more and 55 mm or less.
24. The absorbent body is composed of a laminate of absorbent sheets, and has a multilayer part in the excretory part facing part,
    The absorbent article according to any one of claims 1 to 23, wherein the vertical groove and the multilayer part have a separation distance of 7 mm or less at the closest part of the excretory part facing part.
25. The absorbent body is composed of a laminate of absorbent sheets, and has a multilayer part in the excretory part facing part,
    The absorbent article according to any one of claims 1 to 24, wherein a thickness of the multilayer portion of the absorbent body is 0.7 mm or more and 5 mm or less.
26. The absorbent body is composed of a laminate of absorbent sheets, and has a multilayer part in the excretory part facing part,
    The absorbent article according to any one of claims 1 to 25, wherein the thickness of the absorber part other than the multilayer part is not less than 0.3 mm and not more than 3 mm.
27. The absorbent body is composed of a laminate of absorbent sheets, and has a multilayer part in the excretory part facing part,
    The absorbent article according to any one of claims 1 to 26, wherein a difference in thickness near a boundary between the thickness of the multilayer portion and the portion outside the multilayer portion is 2 mm or less.
28. The absorbent article according to any one of claims 1 to 27, wherein the absorbent article is a sanitary napkin.
    

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