CN105407845A - absorbent article - Google Patents

Abstract

The absorbent article (1) of the present invention has the flap sections (7) on both sides of the excretion portion-corresponding section (B), and the absorbent body (4) has, in the excretion portion-corresponding section (B), excretion portion slit regions (S) in which slits (43) extending in the longitudinal direction (X) are formed in a dispersed state, and has a central slit region (S1) in the center of the excretion portion slit region (S) in the lateral direction (Y) and the longitudinal direction (X). The absorptive body (5) is formed with vertical grooves (51) on both the left and right outer sides of a central slit region (S1). The absorber (4) is provided with vertical slits (43 a-43 e) overlapping the vertical grooves (51) and vertical slits (43f, 43g) located outside the vertical grooves (51) on both the left and right sides of the central slit region (S1).

Description

absorbent article

technical field

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

Background technique

In order to prevent side leakage of absorbent articles such as sanitary napkins and incontinence pads, it is conceivable to increase the absorption capacity by configuring the absorbent article or its absorbent body to have a wider width. However, when only widening the width of the absorber, there is a concern that the side portion of the absorber protrudes from the side edge of the crotch portion of clothing such as shorts, and the workability of fixing the flap portion to the crotch portion by folding it over may deteriorate. , or pleats on the part protruding from the crotch, which makes the wearing feeling worse. Wrinkling is not a deformation for the purpose of improving performance such as fit, but an unintentional deformation.

In addition, a technique of forming slits or openings in an 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.

In addition, Patent Document 2 describes that a plurality of cutouts are formed in a low-rigidity portion surrounded by a joining pattern formed by joining a top sheet and a liquid absorbing layer.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 63-18122

Patent Document 2: Japanese Patent Laid-Open No. 2006-081558

Contents of the invention

The inventors of the present invention have studied the technique of forming slits in the absorbent body in a dispersed state to improve the flexibility of the absorbent body, and found that when the slits are formed in the absorbent body, the flaps are stretched and fixed to the crotch. When it is closed, the slit will open, and the top sheet will be separated from the absorber to cause absorption resistance. Therefore, there will be adverse situations such as: the excrement that cannot be smoothly transferred to the absorber remains on the front sheet and gives the wearer a moist feeling; The liquid is accumulated, and the liquid flows on the surface of the front sheet, which is easy to cause liquid leakage.

In Patent Document 1, regarding the slits formed in the absorber, the slits formed along the longitudinal direction of the absorber and the slits formed along the width direction are separately disclosed, and the slits along the longitudinal direction extend over approximately Formed continuously throughout the length. Even if the absorbent body is provided with slits along the longitudinal direction thereof, wrinkles extending in the longitudinal direction of the absorbent article tend to occur, and the wrinkles cause discomfort to the wearer or leakage.

The technology of Patent Document 2 is a technology for maintaining the strength of the liquid-absorbing layer by reinforcing the low-rigidity portion with the top sheet. Patent Document 2 does not describe a method that can improve operability and wearing comfort when fixing using the flap portion and can prevent troubles caused by the opening of the slit.

Therefore, the present invention relates to an absorbent article capable of solving the problems of the prior art.

The present invention provides an absorbent article comprising an absorbent main body comprising: a liquid-retaining absorbent body; a front sheet disposed on the skin-facing side of the absorbent body; and a non-woven fabric disposed on the absorbent body. The backsheet on the skin-facing side, the absorbent main body having: an excretion-facing portion disposed opposite to the wearer's excretion when worn; and a front portion disposed closer to the abdomen of the wearer than the excretion-facing portion and a rear portion disposed closer to the back of the wearer than the excretion-facing portion, the absorbent article having a longitudinal direction corresponding to the front-back direction of the wearer and a transverse direction perpendicular thereto. The above-mentioned absorbent article has a pair of flap portions respectively extending outward in the lateral direction from both side portions in the longitudinal direction of the excretory portion facing portion. The absorbent body has an excretion portion slit region in the excretion portion opposing portion, and longitudinal slits along the longitudinal direction in the excretion portion slit area are formed in a dispersed state in both the longitudinal direction and the transverse direction. The above-mentioned horizontal and vertical central portions of the regions have a central slit area formed by arranging a plurality of the above-mentioned vertical slits in a dispersed state. The absorptive main body has longitudinal grooves formed by bonding the top sheet and the absorber on both left and right outer sides of the central slit region. The absorber includes a vertical slit having a portion overlapping the vertical groove and a vertical slit located outside the vertical groove on both left and right outer sides of the central slit region.

Description of drawings

Fig. 1 (a) is a plan view showing the skin-facing side (front sheet side) of a sanitary napkin as an embodiment of the absorbent article of the present invention, and Fig. 1 (b) shows only the sanitary napkin. Partial top view of the absorber.

Fig. 2 is a schematic sectional view of II-II in Fig. 1 .

Fig. 3 is a plan view showing the positional relationship between longitudinal slits, vertical grooves and horizontal grooves in the absorbent body of the sanitary napkin shown in Fig. 1 .

Fig. 4(a) and Fig. 4(b) are partially enlarged plan views of the absorber showing a preferable arrangement of vertical slits in the excretory portion slit region.

Fig. 5(a) and Fig. 5(b) are partially enlarged plan views of the absorber showing other arrangements of vertical slits in the excretory portion slit region.

Fig. 6 is an enlarged plan view showing a preferred structure of longitudinal grooves, front lateral grooves, and rear lateral grooves.

7( a ) to 7( d ) are schematic cross-sectional views of an auxiliary absorbent body showing other examples of the folding method of the absorbent sheet.

8( a ) and FIG. 8( b ) are partially enlarged schematic plan views of an absorber showing other examples of the arrangement of longitudinal slits of the absorber that can be employed in the present invention.

detailed description

Hereinafter, the absorbent article of the present invention will be described based on a sanitary napkin which is a preferred embodiment thereof, with reference to the drawings. As shown in FIGS. 1 and 2 , the sanitary napkin 1 of this embodiment includes an absorbent body 4 having liquid retentivity, a top sheet 2 disposed on the skin-facing side of the absorbent body 4 , and a non-woven fabric disposed on the absorbent body 4 . The absorbent main body 5 of the backsheet 3 on the side facing the skin has a longitudinal direction X corresponding to the wearer's front-back direction and a transverse direction Y perpendicular thereto.

In addition, in this specification, the skin-facing surface is the surface facing the wearer's skin side when the absorbent article is worn in the absorbent article or its constituent parts (for example, the absorbent main body 5), and the non-skin-facing surface is the absorbent article or the absorbent article. The surface facing the side (wearing side) opposite to the skin side when the absorbent article is worn among the constituent members. In addition, the vertical direction X corresponds to the longitudinal direction of the absorbent article (absorbent main body), and the horizontal direction Y corresponds to the width direction (direction perpendicular to the longitudinal direction) of the absorbent article (absorbent main body).

The absorbent main body 5 has, in the longitudinal direction X, an excretion-part facing part B, which is arranged opposite to the wearer's liquid discharge part (vaginal opening, etc.) when worn; a position closer to the abdomen side (front side) of the wearer; and a rear part C which is arranged at a position closer to the wearer's back side (rear side) than the excretion part opposing part B when worn.

The sanitary napkin 1 also has a pair of wing portions 7, 7 in addition to the absorbent main body 5. They respectively extend outward in the horizontal direction Y.

In addition, in the absorbent article of the present invention, the excretion portion facing portion is a region having a flap portion in the longitudinal direction of the absorbent article (longitudinal direction of the absorbent article, X direction in the drawing) (longitudinal direction of the flapped portion). The area where the roots on one side are sandwiched by the roots on the other side).

As shown in FIG. 2 , the top sheet 2 covers the entire area of the skin-facing surface of the absorber 4 , and further extends from both side edges of the absorber 4 along the longitudinal direction X to the outside in the transverse direction Y (extension). On the other hand, the back sheet 3 covers the entire area of the non-skin-facing surface of the absorber 4, and further extends from both side edges of the absorber 4 along the longitudinal direction X to the outside of the transverse direction Y, together with the side sheets 10 described below. The wing portion 6 is formed. The back sheet 3 and the side sheet 10 are joined to each other by known joining methods such as adhesives, heat sealing, and ultrasonic sealing at the extending portions from both side edges of the absorber 4 along the longitudinal direction X. Each of the topsheet 2 and the backsheet 3 and the absorber 4 may be bonded via an adhesive.

The absorbent body 4 in this embodiment includes a laminate of absorbent sheets 401 to 403 as shown in FIG. 2 , and has a multilayer portion 42 at the excretory portion facing portion B as shown in FIGS. 1 and 2 . As shown in FIG. 2 , the multilayer part 42 is a part in which the number of laminated sheets of the absorbent sheet constituting the absorber 4 is larger than the part located around it. In this embodiment, the thickness of the multilayer part 42 is also thicker than the surrounding part, and a protruding part protruding toward the top sheet 2 side (the skin facing side of the sanitary napkin 1 ) is formed in the excretory part facing part B. In addition, the absorber 4 includes a main absorber 40 that forms the outer shape of the absorber 4 , and an auxiliary absorber 41 that is arranged to overlap a part of the main absorber 40 and is smaller than the main absorber 40 . The main absorbent body 40 includes two absorbent sheets 401 and 402 of the same shape and size. These absorbent sheets 401 and 402 have a substantially rectangular shape with curved corners in plan view and pass from the front part A through the excretory part opposing part B. Extending to the rear portion C, the auxiliary absorbent body 41 has a substantially rectangular shape in plan view, and is arranged from the excretory portion facing portion B to the rear portion C in the vicinity thereof. The auxiliary absorbent body 41 is formed by folding one absorbent sheet 403 into a two-layer structure, and is arranged between the two absorbent sheets 401 and 402 constituting the main absorbent body 40 . By arranging the auxiliary absorbent body 41 in a part of the main absorbent body 40, the absorption capacity of a part of the absorbent body 4 can be increased easily and efficiently. The auxiliary absorbent body 41 may be laminated on the skin-facing side of the absorbent sheet 401 constituting the upper side of the main absorbent body 40, or may be laminated on the non-skin-facing surface of the absorbent sheet 402 constituting the lower side of the main absorbent body 40. side, instead of being arranged between the two absorbent sheets 401 and 402 constituting the main absorbent body 40 . In addition, the absorbent sheets may not be bonded, or may be bonded by sprayed adhesive or the like.

As shown in Figures 1 and 2, on both sides of the skin-facing surface of the absorbent main body 5 (the skin-facing surface of the front sheet 2) along the longitudinal direction X, a pair of side panels 10, 10 are aligned with the absorbent surface when viewed from above. The body 4 is arranged over substantially the entire length of the longitudinal direction X of the absorbent main body 5 so that the left and right side parts along the longitudinal direction X overlap. A pair of side panels 10, 10 are respectively located at the linear first joint line 11 at the excretory part facing part B and at the front and rear (front part A and rear part C) positions of the first joint line 11 in the longitudinal direction X (front part A and rear part C). The second joining line 12 is joined to the absorptive main body 5 (top sheet 2). The first joining line 11 has a curved shape protruding outward in the horizontal direction Y in a plan view, and the second joining line 12 is a line (zigzag line) extending so as to intersect the longitudinal direction in a plan view. The side panels 10 are made of a water-repellent nonwoven fabric. When the side sheet 10 is joined to the skin-facing surface (front sheet 2) of the absorbent main body 5 at the joining lines 11 and 12 in this way, as shown in FIG. , and form the space part P partitioned and formed by the side sheet 10 and the top sheet 2 . Since the space P is open to the center of the absorbent main body 5 in the horizontal direction Y, excrement such as menstrual blood flowing outward from the center in the horizontal direction Y is accommodated in the space P, and as a result, leakage of the excrement can be effectively prevented.

As shown in FIG. 1 , the side flaps 6 protrude largely outside the excretory portion B in the horizontal direction Y, whereby a pair of flaps 7 are extended on the left and right sides of the absorbent main body 5 along the longitudinal direction X. , 7. In addition, as shown in FIG. 1, the front sheet 2 and the back sheet 3 extend from the front end and rear end of the longitudinal X of the absorber 4 to the outside of the longitudinal X, respectively. The end seals are formed by joining together using a known joining method such as ultrasonic sealing.

The flap portion 7 is used by being folded back on the non-skin-facing side of the crotch of clothing worn such as shorts. As shown in FIG. 1 , the flap portion 7 has a substantially trapezoidal shape in which the lower base (the side longer than the upper base) is located on the lateral side of the absorbent main body 5 in plan view. On the non-skin-facing surface of the flap portion 7, a flap portion sticking portion (not shown) is formed to fix the flap portion 7 (sanitary napkin 1) to clothes (not shown) worn such as shorts, and the The flap part sticking part can stick and fix the flap part 7 folded back to the non-skin-facing surface (outer surface) side of the crotch part of the clothing worn during use to the crotch part. Moreover, the main body sticking part (not shown) for fixing the absorbent main body 5 to the clothing worn, such as shorts, is formed also in the non-skin facing surface of the absorbent main body 5.

As shown in Figures 1 and 2, on the skin-facing surface of the absorbent main body 5 (the skin-facing surface of the front sheet 2), the front sheet 2 and the absorber 4 are integrally recessed toward the back sheet 3 and formed in a linear shape. groove. The above-mentioned linear grooves are embossed grooves formed by integrally pressing the front sheet 2 and the absorber 4, and include: a pair of longitudinal grooves 51, 51 extending in the longitudinal direction X at the part B opposite to the excretion part; 52 and the second front lateral groove 53 located at the front portion A and respectively extending in the lateral direction Y; and the rear lateral groove 54 and the second rear lateral groove 55 located at the rear portion C respectively extending in the lateral direction Y. The linear grooves can be formed by conventional methods by extrusion processing (so-called embossing) with or without heat or embossing such as ultrasonic embossing. In the linear grooves, although not shown, the top sheet 2 and the absorber 4 are pressure-bonded via an adhesive, or integrated (bonded) by thermal fusion or the like. The expression of the connection between the top sheet 2 and the absorber 4 also includes the case where another sheet member such as a second sheet member is provided between the top sheet 2 and the absorber 4, and the top sheet is joined to the other sheet member, Furthermore, this other sheet member is bonded (bonded) to the absorber 4 .

Such linear grooves can suppress the liquid from spreading in the planar direction of the absorbent body 4, thereby effectively preventing the liquid from leaking from the periphery of the sanitary napkin 1. The width (length in the direction perpendicular to the longitudinal direction) and depth of the linear grooves may be set in the same manner as the linear grooves in such an absorbent article. In addition, the "linear" in the linear groove means that the shape of the groove (recess) is not limited to 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 also include a row formed by a plurality of discontinuous embossing points. Moreover, as shown in FIG. 1, the sanitary napkin 1 of this embodiment is formed symmetrically with respect to the center line (not shown) which bisects the absorptive main body 5 in the horizontal direction Y.

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 horizontal direction Y, and the pair of vertical grooves 51, 51 are formed with the center line as the center line. The base is left-right symmetrical. A pair of vertical grooves 51, 51 extend not only in the excretory portion facing portion B, but also extend from the excretion portion facing portion B to the front portion A and the rear portion C respectively. The outer side of extends in the longitudinal direction X. In addition, in the sanitary napkin 1 of the present embodiment, the vertical groove 51 is formed in a curved shape concaved inward in the lateral direction from each of the front portion A and the rear portion C to the excretory portion facing portion B. Therefore, the distance between the pair of vertical grooves 51 and 51 is the narrowest near the longitudinal center of the excretory portion facing portion B, and the distance between the front portion A and the rear portion B is the widest.

The front lateral groove 52 and the second front lateral groove 53 are convexly curved toward the front end in the longitudinal direction X of the absorbent main body 5 in a plan view, and the rear lateral groove 54 and the second rear lateral groove 55 are curved toward the absorbent main body 5 in a plan view. The rear end of the longitudinal X is convexly curved. The protruding tops of the horizontal grooves 52 to 55 are located in the center of the horizontal direction Y of the absorbent main body 5 . The pair of longitudinal grooves 51, 51 are connected to the second front lateral groove 53 and the second rear lateral groove 55 at their longitudinal ends, thereby forming a ring-shaped surface on the surface of the absorbent body 5 facing the skin in plan view. groove.

As shown in FIG. 1 and FIG. 3 , the absorbent body 4 in the sanitary napkin 1 of this embodiment has an excretion portion slit area S in the excretion portion opposing portion B, and in the excretion portion slit area S, a longitudinal slit 43 along the longitudinal direction X is formed. It is formed in a dispersed state in both the longitudinal X and lateral Y directions. The longitudinal slits 43 are formed in both the multi-layered portion 42 in the excretory portion-facing portion B and a portion other than the multi-layered portion 42 . In addition, the excretory portion slit area S reaches not only the excretory portion facing portion B but also a part of the front portion A and a part of the rear portion C. As shown in FIG.

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

As shown in FIG. 2 , the vertical slit 43 preferably penetrates through the laminated body of the absorbent sheets constituting the absorbent body 4 . The vertical slit 43 is preferably not formed on the front sheet 2 and the back sheet 3 disposed above and below the absorber 4, nor is it formed on the second sheet member ( not shown).

In addition, the absorbent body 4 in the sanitary napkin 1 of the present embodiment has a central slit area S1 in the central portion of the excretory portion slit area S in the horizontal direction Y and the longitudinal direction X, and a plurality of slits are arranged in a dispersed state in the central slit area S1. Longitudinal slot 43. The central slit region S1 is a region located between the pair of vertical grooves 51 , 51 in the horizontal direction Y and 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 located on the left and right outer sides of the central slit area S1 , and the front lateral groove 52 and the rear lateral groove 54 are located on the front and rear outer sides of the central slit area S1 . In addition, 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 this embodiment is located in the front portion A, and the rear lateral groove 54 is located in the rear portion C. As shown in FIG. In addition, the front lateral groove 52 is located forward of the front end of the multilayer part 42 , and the rear lateral groove 54 is located rearward of the rear end of the multilayer part 42 .

The arrangement of the longitudinal slits 43 in the excretory portion slit area S is not particularly limited as long as the longitudinal slits 43 are dispersed in both directions of the longitudinal direction X and the width direction Y, but the arrangement is preferably as follows, that is, as shown in FIG. As shown in b), a column L including a plurality of longitudinal slits 43 arranged in the longitudinal direction X of the sanitary napkin 1 (absorbent article) is formed in a plurality of columns in the horizontal direction Y, and the columns are adjacent to each other in the horizontal direction. The positions of the longitudinal X of the longitudinal slits 43 are inconsistent.

An example of a preferred arrangement of the longitudinal slits in the excretory slit region S is shown in FIG. 4 . In the central slit region S1, four or more slits are preferably dispersedly arranged.

In the arrangement shown in Fig. 4 (a) and (b), the slit rows R1, R2 comprising a plurality of longitudinal slits 43 spaced apart in the transverse direction Y of the sanitary napkin 1 are formed on the longitudinal direction X of the sanitary napkin 1. Multi-line. In FIG. 4, a slit row R1 comprising two longitudinal slits 43 spaced apart in the transverse direction Y, and a slit row R2 comprising three longitudinal slits 43 spaced apart in the transverse direction Y are alternately arranged in the longitudinal direction X. However, in the central slit region S1 of the present invention, it is preferable that the slit row including at least two vertical slits spaced apart in the horizontal direction Y is formed in two rows in the vertical direction X. In addition, in the central slit region S1, preferably three or more slit rows are formed in the longitudinal direction X, more preferably four or more rows are formed, and especially five or more rows are preferably formed. In addition, the number of vertical slits included in each slit row at intervals in the horizontal direction X is preferably 2 or more, and more preferably 3 or more.

In the longitudinal direction X of the excretory slit region S, in addition to the slit rows included in the central slit region S1, there are preferably one or more slit rows before and after the central slit region S1 in the longitudinal direction X.

In the example of the preferred arrangement of the longitudinal slits shown in FIG. 4 , there is no space P between adjacent rows of slits in the longitudinal direction X of the sanitary napkin 1 . That is, the interval P shown in FIG. 5( a ) is not provided between two adjacent slit rows R1 and R2 in the longitudinal direction X. As shown in FIG. In the expression that there is no interval P between adjacent slit rows: the situation that the ends of the slits 43 of the adjacent slit rows shown in Fig. 4 (a) are in the same position; and as shown in Fig. 4 (b) The case where the adjacent slit rows overlap a part in the longitudinal direction X. As shown in FIG. 4( b ), when two slit rows are arranged in the longitudinal direction X in a state of partially overlapping each other, the overlapping length L1 is preferably equal to the length L2 of the longitudinal slits constituting the slit row in the direction X. 20% or less, preferably 10% or less.

In the preferred arrangement example of the longitudinal slits shown in FIG. 4 , the positions of the slits of adjacent slit rows in the longitudinal direction X of the sanitary napkin 1 are shifted in the transverse direction Y of the absorbent article. As shown in Fig. 4(a) and Fig. 4(b), the longitudinal slits 43 in the two adjacent slit rows R1, R2 in the longitudinal direction X are preferably located in the other slit row R2. In the center between the slits 43, the slits 43 of one slit row R1 may be deviated to either side of the slits 43 of the other slit row R2. FIG. 5( b ) is a diagram showing an example in which the positions of the slits of the adjacent slit rows R1 and R2 in the vertical direction X are not shifted in the horizontal direction Y. FIG.

In addition, like the example shown in Figure 5 (a), when the interval P is set between adjacent slit rows on the longitudinal X of the sanitary napkin 1, the interval P is preferably the length L2 of the longitudinal X of the longitudinal slit 43 constituting the slit row. 50% or less, more preferably 35% or less. Moreover, 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 sanitary napkin 1 according to the present embodiment is provided with and vertically arranged on both sides of the excretion portion slit area S, more specifically, on the left and right outer sides of the central slit area S1. The plurality of longitudinal slits 43a to 43e in the overlapping portions of the grooves 51. Specifically, there are slits 43a and 43c overlapping with the vertical groove 51 over substantially the entire length, and slits 43b, 43d, and 43e partially overlapping with the vertical groove 51 . More specifically, when the vertical groove 51 is composed of a curved shape having a plurality of curvatures as in the present embodiment, the curved portion of the vertical groove 51 is horizontal in the direction of inclination as shown by the slit 43a in the portion with a large curvature. The front and rear sides of the slit are overlapped over the entire length of the slit. On the other hand, in the portion with a smaller curvature, as shown in the slit 43c, the longitudinal direction of the vertical groove 51 is approximately consistent with the longitudinal direction of the slit. Overlaps the entire length.

In addition, as shown in FIG. 1 and FIG. 3 , the absorbent body 4 of the sanitary napkin 1 according to the present embodiment has portions on the left and right outer sides of the central slit region S1 that are located outside the vertical grooves 51 and do not overlap with the vertical grooves 51 . Longitudinal slits 43f, 43g. In addition, there is a vertical slit 43h intersecting with the front horizontal groove 52 at a position forward of the central slit area S1 in the longitudinal direction of the sanitary napkin 1, and at a position rearward of the central slit area S1 in the longitudinal direction of the sanitary napkin 1. , has a longitudinal slit 43i intersecting with the rear transverse groove 54.

By arranging the slits overlapping the vertical grooves 51, it is possible to moderately suppress both the slits outside the vertical grooves 51 and the slits inside the vertical grooves 51 (slits in the central slit area S1) in the horizontal direction Y of the sanitary napkin 1. the mouth of the person. In addition, the slit overlapping the longitudinal groove 51 can suppress the influence of the pleats generated in the outer region of the longitudinal groove 51 from being transmitted to the inner region of the longitudinal groove 51, thereby maintaining the softness of the central slit region S1 and the easy conformability of the article to the body. sex. On the other hand, according to this structure, both the conformability of the both side parts along the longitudinal direction X of the sanitary napkin 1, and the handleability of a flap part can be improved. From the viewpoint of obtaining this effect more reliably, it is preferable to partially overlap the vertical slit 43 and the vertical groove 51 over the entire length of the slit. In this regard, it is preferable to have a wavy shape with a curved portion or a bent portion or a gentle slope as shown in FIG. The groove shape of the part.

According to the sanitary napkin 1 of the present embodiment, the absorbent body 4 has the excretory portion slit area S in the excretory portion facing portion B, and in the excretory portion slit area S, the plurality of longitudinal slits 43 along the longitudinal direction are divided between the longitudinal direction X and the transverse direction Y. The state dispersed in two directions is formed, and there are longitudinal slits 43f, 43g located outside the positions of the vertical grooves 51, 51 on both sides of the absorber 4, and do not overlap with the vertical grooves 51, so the flaps 7, 7 When fixing by folding to the crotch of clothing such as shorts, the side of the absorber 4 is flexibly deformed using the longitudinal slits of each part, so the operability when fixing with the flaps is excellent. At this time, since the vertical groove 51 is located on the inner side of the longitudinal slits 43f and 43g, the rigidity thereof can improve the ease of deformation of the slit portion and suppress deformation of other parts. In addition, since the longitudinal slits 43a to 43e overlapping with the vertical grooves 51 are provided on both sides of the central slit area S1, the portion of the absorber 4 having the vertical grooves 51 in the horizontal direction Y is also easily deformed, so that the flap portion 7 , 7 The operability when it is fixed on the crotch portion of shorts or the like is further improved. In particular, in terms of improving the operability of the flap portions 7, 7 by using the vertical slits 43f, 43g that do not overlap with the vertical groove 51, it is preferable that the vertical groove 51 in the excretory portion facing portion B is directed inward as shown in FIG. Curved shapes for convex shapes.

In addition, in the sanitary napkin 1 of this embodiment, there are longitudinal slits 43h and 43i intersecting the front horizontal groove 52 or the rear horizontal groove 54 at the front and rear of the central slit area S1, and furthermore, on both sides of the central slit area S1, there are The longitudinal slits 43a to 43e overlapping with the longitudinal grooves 51, therefore, the absorber 4 is easily deformed in the longitudinal direction X where the front transverse groove 52 and the rear transverse groove 54 are formed, or in the transverse direction Y where the longitudinal groove 51 is formed. The operability when fixing the flap portions 7, 7 to the crotch portion of shorts or the like is further improved. Moreover, such a structure can also effectively prevent the side part of the absorber 4 from being wrinkled, and the sanitary napkin 1 of this 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 portions of the absorber 4 tend to be wrinkled.

The excretory part slit area S may also extend from the excretory part opposite part B to at least one of the front part A and the rear part C, and the excretory part slit area S also preferably has an overlap with the vertical groove 51 at the part located at the front part A and the rear part C. the longitudinal gap.

In addition, in the sanitary napkin 1 of the present embodiment, at each position of the front horizontal groove 52, the rear horizontal groove 54, and the vertical groove 51, the vertical slit 43 is arranged in a state of intersecting with these grooves or overlapping with these grooves partially or completely. . Therefore, even if tension is applied to the sanitary napkin 1 in the horizontal direction Y, the opening of these slits can be suppressed by bonding the topsheet 2 or the second sheet member disposed thereunder to both sides of each slit. In addition, by suppressing the opening of the vertical slits 43h and 43i intersecting the front lateral groove 52 and the rear lateral groove 54, the opening of the vertical slit 43 located in the central slit region S1 can also be suppressed to some extent. Therefore, it is possible to prevent the absorption resistance that tends to occur when the longitudinal slits of each part are opened, and it is also possible to prevent the wearer from feeling wet due to the liquid remaining on the top sheet or easily causing liquid leakage.

It is preferable that the absorber 4 has one or more of the following structures from the viewpoint of obtaining the above-mentioned effects more reliably.

The length L2 (see FIG. 4 ) of the longitudinal slit 43 in the excretory portion slit region S is preferably 10 mm or more, more preferably 15 mm or more, and preferably 35 mm or less, more preferably 25 mm or less, and preferably 10 to 35 mm, More preferably, it is 15-25 mm.

The interval L5 (see FIG. 4 ) of the vertical slits 43 in the same slit row in the excretory portion slit region S is preferably 3 mm or more, more preferably 7 mm or more, and preferably 20 mm or less, more preferably 15 mm or less. 3 mm or more and 20 mm or less, more preferably 7 mm or more and 15 mm or less.

The length L4 (see FIG. 1 ) of the excretory portion slit region S in the transverse direction Y is preferably 30% or more of the length of the absorber 4 in the excretory portion facing portion B in this direction Y, more preferably 40% or greater, and is preferably 85% or less, more preferably 75% or less. The length L4 in the transverse direction Y of the excretory 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. 1(b), in order to avoid that in any direction of the longitudinal X and the transverse Y, the vertical slit 43 overlaps with the dotted line representing the slit area S of the excretion part and is difficult to see clearly, in other words, from the viewpoint of easy observation, The excretory portion slit area S is shown in a range slightly larger than the range in which the longitudinal slits 43 are distributed. However, the discharge part slit area S in the present invention is the range where the longitudinal slits 43 are distributed, and the length L4 of the transverse direction Y is the distance between the outer edges of the longitudinal slits 44 at both ends of the transverse direction Y as shown in Figure 1 (b). .

In each of the outer sides of the central slit region S1, the number of the longitudinal slits 43 wholly or partially overlapping the longitudinal grooves 51 may be one, but preferably multiple, more preferably three or more. In addition, the absorber 4 preferably includes a vertical slit having a portion overlapping the vertical groove 51 and a portion not overlapping the vertical groove 51 as the vertical groove overlapping the vertical groove 51 in terms of both the handleability and absorbency of the flap portion. aperture.

In addition, the number of vertical slits positioned outside the vertical grooves 51 may be one, but is preferably multiple on both outer sides of the central slit region S1. In terms of improving the leak-proof effect, the vertical slits 43f and 43g located outside the vertical groove 51 are preferably formed in the region between the article inner end of the side panel 10 and the vertical groove 51 shown in FIG. 2 .

Also, the number of vertical slits 43h intersecting with the front lateral groove 52 and the number of longitudinal slits 43i intersecting with the rear lateral groove 54 may each be one, but are preferably plural, and more preferably three or more. At this time, it is preferable that one or more longitudinal slits 43h, 43i intersecting with the lateral grooves 52, 54 exist on both sides in the longitudinal direction of the lateral grooves, because the wrinkling suppression effect is high. In addition, it is preferable that the front lateral groove 52 and the rear lateral groove 54 intersect the vertical slit 43h or the vertical slit 43i in a cross shape rather than in a T-shape.

As shown in FIG. 1( b ), in the absorbent body 4 of the sanitary napkin 1 according to this embodiment, the periphery of the excretion portion slit region S is surrounded by an annular non-slit region N having no slit.

Surrounding the periphery of the slit area S of the discharge portion by the non-slit area N can reliably prevent liquid from leaking out due to liquid seeping in along the longitudinal slit.

In addition, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 3 , the central slit area S1 is formed in the multilayer portion 42, and the front lateral groove 52 intersecting the longitudinal slit 43h and the rear lateral groove 54 intersecting the longitudinal slit 43i The respective lengths L6 and L7 in the horizontal direction Y are shorter than the length L8 in the horizontal direction Y of the multilayer portion 42 .

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 horizontal direction Y of the multilayer part 42, the crossing of the lateral grooves 52 and 54 at the center in the width direction of the absorber 4 can be suppressed. The longitudinal slits 43h, 43i or the longitudinal slits in the central slit region S1 between the transverse grooves 52, 54 are opened, and maintain good conformability of the side portions. Since the multilayer part 42 is opposed to the excretion part, it is preferable that the excrement liquid can be absorbed into the inside of the absorber as quickly as possible. Therefore, the horizontal grooves 52 and 54 are formed so as to overlap the longitudinal slits 43h and 43i located in the front and rear of the multilayer part, so that the excessive opening of the slits in the multilayer part 42 does not hinder absorption. Once the excretion is absorbed by the top sheet, it permeates into the absorber. However, if the opening is too large, the portion where the top sheet and the absorber are not joined increases, so that the liquid transfer from the excretion to the absorber cannot be performed smoothly. By making the length L7 of the horizontal groove 54 shorter than the length L8 of the horizontal direction Y of the multilayer part 42, the user can hardly feel the hardness of the horizontal grooves 52 and 54, and it is difficult to prevent the formation of the horizontal groove 54 on the side of the absorber other than the multilayer part. The opening of the longitudinal slit of the upper part. As a result, the operability and ease of wearing of the fins will not be hindered, and there will be no uncomfortable feeling during use.

The ratio of the length L6 of the front lateral groove 52 and the length L7 of the rear lateral groove 54 to the length L8 of the horizontal direction Y of the multilayer portion 42 is preferably 90% or less, more preferably 85% or less, and preferably 50% or more. , more preferably 60% or more.

When the length L8 of the multilayer portion 42 is not constant in the longitudinal direction X, the length L8 of the multilayer portion 42 in the horizontal direction Y is the length of the smallest portion in the product width direction.

In addition, in the sanitary napkin 1 of this embodiment, as shown in FIGS. The multilayer part 42 side is convexly curved.

In order to improve the fit of the sanitary napkin 1 or the absorbent body to the wearer, it is preferable to use the central part of the horizontal direction Y of the absorbent body 4 as a multilayer part 42, so that its rigidity is higher than the rigidity of the parts forming the longitudinal grooves on both sides. However, when the distance between the multilayer part 42 and the longitudinal groove 51 is too large, the rigidity is poor, so that the position between the multilayer part 42 and the longitudinal groove 51 is easy to crease. In contrast, by making the vertical groove 51 into a shape curved so as to protrude toward the multilayer part 42 as in the present embodiment, it is possible to prevent such creases from being generated.

The distance between the vertical groove 51 and the closest part of the multilayer part 42 in the excretory part facing part B is preferably 7 mm or less, more preferably 5 mm or less.

FIG. 6 is a schematic enlarged plan view of an absorber showing a preferred structure of the longitudinal grooves 51 , the front lateral grooves 52 , and the rear lateral grooves 54 . The longitudinal groove 51, the front transverse groove 52 and the rear transverse groove 54 respectively have a high compression part 56 and a low compression part 57 with a lower degree of compression in the groove. long shape. Furthermore, the width W of the front lateral groove 52 and the rear lateral groove 54 is wider than that of the vertical groove 51 .

Regarding the vertical grooves 51, by making the shape of each highly compressed portion 56 long in the longitudinal direction of the groove, such as the shape shown in FIG. Improve fit.

Regarding the front lateral groove 52 and the rear lateral groove 54, by making the shape of each high compression portion 56 long in the longitudinal direction of the groove, such as the shape shown in FIG. Further, it is possible to reliably suppress defects caused by the opening of the slit.

Regarding the high compression portion 56 , the shape longer in the longitudinal direction of the groove means that the length L9 in the direction along the groove is longer than the length L10 in the direction perpendicular to the groove. In addition, the low-compression portion 57 may be a portion that is not directly compressed during embossing for forming each groove, and the high-compression portion 56 may be a non-long shape such as a long shape and a dot shape shown in FIG. 6 . alternating structures.

Furthermore, by making the width W of the front lateral groove 52 and the rear lateral groove 54 wider than the width W of the vertical groove 51, not only the opening of the slit of the excretory part can be suppressed, but also the puckering of the excretory part can be prevented, so that a further improved fin can be obtained. The operability of the department and the beneficial effect of reducing discomfort.

As shown in Fig. 1(a) and Fig. 2, the absorbent body 4 of the sanitary napkin 1 according to this embodiment has a multi-layered part 42 at the part B facing the excretory part, and the excretory part slit area S and the central slit area S1 are formed in the area including the multiple layers. Layer 42 area. Therefore, it is possible to obtain the advantageous effects of further improving the leak-proof effect and being able to obtain conformability following body movements.

Although not shown, it is preferable that the sanitary napkin 1 further has a second sheet member between the absorber 4 and the top sheet 2 . The second sheet member is preferably a liquid-permeable fibrous sheet member whose constituent fibers are synthetic fibers. When the second sheet member is made of synthetic fibers, the diffusivity of the liquid can be kept low. In addition, the synthetic fibers constituting the second sheet member are preferably weakly hydrophilic fibers from the viewpoints of suppressing diffusivity low and mechanical suitability. Fibers made of polyester such as polyethylene, polypropylene, polyethylene terephthalate, and polybutylene terephthalate, and polyamides such as nylon-6 and nylon-66 can be used alone for the second sheet. Or two or more kinds are mixed and formed. In addition, the term "mixing" here includes the case where two or more types of resins having different melting points are used as core-sheath composite fibers or side-by-side composite fibers.

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

As the second sheet member, an air-through nonwoven fabric formed by joining intersection points of intersecting synthetic fibers by air-through thermal welding can be preferably used. In addition, point bonding nonwoven fabrics, spunbond nonwoven fabrics, spunlace nonwoven fabrics, etc. may be used other than air-through nonwoven fabrics. When the second sheet member is an air-through nonwoven fabric, its basis weight (mass per unit area) is preferably not less than 15 g/m ² and not more than 40 g/m ² .

Between the top sheet 2 and the second sheet member and between the second sheet member and the absorber 4 are preferably partially fixed. In addition, when the second sheet member does not exist, it is preferable that the topsheet 2 and the absorber 4 are partially fixed.

Thereby, both the moderate opening of a slit part and the adhesiveness of a top sheet or a 2nd sheet|seat member, and an absorber can be ensured. Moreover, the adhesiveness from the top sheet 2 to the absorber 4 also improves in the site|parts other than a slit, and the transferability of the liquid from the top sheet 2 to the absorber 4 improves. The adhesion between the top sheet 2 and the second sheet member is improved, and the liquid becomes easy to transfer.

The so-called partial fastening refers to having a fastening portion including points or lines, and the fastening portion is distributed over the entire surface of the sheet members without uniform distribution, but does not fasten the entire surface of the sheet members to be fastened. The area of the fixed portion is preferably about 10% to 60% of the area of the entire surface of the sheet member to be fixed. Specifically, an adhesive is applied at intervals, or heat sealing is performed at intervals, and the top sheet 2 and the second sheet member are partially fixed. When applying the adhesive at intervals, the adhesive is applied intermittently using a known mechanism such as a slot-type applicator, or helically applied using a spiral spray gun, or sprayed intermittently using a spray gun. or use a dot gun (dotgun) to apply in dots, and in a state where the permeability of body fluid is maintained between the top sheet 2 and the second sheet member, the top sheet 2 is partially joined to the second sheet member. As the adhesive for application, for example, a hot-melt adhesive is preferably used.

Examples of the hot-melt adhesive include styrenes, olefins, and the like. As the styrene-based hot-melt adhesive, styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), and hydrogen additives to SBS can be used. Styrene-ethylene-butylene-styrene copolymer (SEBS) and a blend-type hot-melt adhesive obtained by blending two or more of these. Among them, from the viewpoint of easily obtaining a balance between sticking force and cohesive force, in particular, a blended hot-melt adhesive of SIS and SBS, or a blended hot-melt adhesive of SIS and SEBS can be preferably used in the present invention. . The coating amount of the hot-melt adhesive is preferably not less than 3 g/m ² and not more than 10 g/m ² .

The forming materials of each part in the sanitary napkin 1 will be described. As the topsheet 2 and the backsheet 3, various materials conventionally used in this technical field can be used without particular limitation. As the surface sheet 2, liquid-permeable sheets, such as various nonwoven fabrics or perforated films, which have been hydrophilized, can be used, for example. In addition, as the back sheet 3, a liquid-impermeable material or a water-repellent material can be used. As a liquid-impermeable material, a resin film, a resin film with micropores and moisture permeability, or a laminate of a resin film and a non-woven fabric can be used. - Composite nonwoven fabrics with multilayer structures such as meltblown and spunbond, spunbond nonwoven fabrics, thermal bond nonwoven fabrics, air-through nonwoven fabrics, etc.

As the absorbent sheets 401 to 403 constituting the absorbent body 4, it is possible to preferably use a bonding force via a water-absorbing polymer in a wet state, or an adhesive such as an adhesive agent or adhesive fiber added separately, so that Combination between constituent fibers or between constituent fibers and water-absorbent polymer to form a structure such as a sheet. In addition, as an absorbent sheet, an absorbent sheet manufactured by the method described in Japanese Patent Laid-Open No. 8-246395 can be used; (such as vinyl acetate-based adhesives, PVA, etc.) consolidated dry sheet; after applying hot-melt adhesives, etc., between paper or non-woven fabrics, it is obtained by dispersing super absorbent polymers Absorbent sheets; Absorbent sheets obtained by blending superabsorbent polymers in the manufacturing process of spunbonded or meltblown nonwoven fabrics, etc. One of these absorbent sheets can be cut into a predetermined shape and used as a sheet-shaped absorbent body. The thickness per absorbent sheet is preferably 0.1 mm or more, more preferably 0.3 mm or more, and preferably 2 mm or less, more preferably 1.5 mm or less. More specifically, it is preferably not less than 0.1 mm and not more than 2 mm, and more preferably not less than 0.3 mm and not more than 1.5 mm.

The laminate of the absorbent sheet in the present invention may have a structure in which a single absorbent sheet is bonded to a plurality of sheets and laminated, or may be formed by folding one absorbent sheet and bonding these layers. formed laminates. In addition, such a laminate may be sandwiched between two absorbent sheets or between layers of a laminate folded into two or more layers, or laminated on the skin-facing side or non-skin-facing side of another absorbent sheet. The structure obtained from the side. In addition, the folding method of the absorbent sheet can also adopt various folding methods. For example, the auxiliary absorbent body in the above embodiment can also be folded by the folding method shown in FIGS. 7(a) to 7(d). Sheet 403 derived structure.

The thickness of the absorber 4 in the multilayer portion 42 is preferably 0.7 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, more specifically, preferably 0.7 mm or more and 5 mm or less, More preferably, it is 1 mm or more and 4 mm or less. By setting the thickness of the multilayer part 42 in such a range, it is possible to easily achieve both good wearing feeling and high absorbency of the excretory part facing part B in which the multilayer part 42 is formed. Moreover, when an absorbent article has a wing part like the sanitary napkin 1 of this embodiment, it can suppress easily that the absorber in the part facing an excretion part is wrinkled at the time of wearing. In addition, the thickness of the absorber other than the multilayer part 42 is preferably 0.3 mm or more, more preferably 0.5 mm or more, and is preferably 3 mm or less, more preferably 2.5 mm or less, and more specifically, is preferably 0.3 mm. It is more than or equal to 3 mm, more preferably more than or equal to 0.5 mm and less than or equal to 2.5 mm. This range is preferable from the viewpoint of high absorbency and improvement of followability to the wearer's movements.

In addition, in the absorber 4, the thickness difference (step difference) between the middle height portion 42 and its peripheral portion boundary or its vicinity is preferably 2 mm or less, more preferably 1.5 mm or less. The purpose of this is to suppress wrinkling in the vicinity of the boundary between the mid-height portion 42 and its peripheral portion where only the main absorbent body 40 exists in the excretory portion facing portion B. FIG. When the step difference is large, there is a case that when the sanitary napkin 1 follows the wearer's movement during wearing, the gap caused by the step difference needs to be filled, and as a result, it is easy to wrinkle due to the influence of the step difference. Setting the level difference within the above range improves the effect of suppressing wrinkling of the excretory portion opposing portion B. FIG. The thickness of each part of the above-mentioned absorber 4 is measured by the following method.

<Measuring method of absorber thickness>

The absorbent body to be measured was left in a horizontal place without wrinkles or bends, and the thickness under a load of 5 cN/cm ² was measured. In the measurement of the thickness in the present invention, a thickness gauge PEACOCKDIALUPRIGHTGAUGESR5-C (manufactured by OZAKIMFG.CO.LTD.) was used. At this time, arrange a circular or square plate (acrylic plate with a thickness of about 5 mm) in plan view between the tip of the thickness gauge and the measurement portion of the object to be measured, and adjust the thickness of the plate so that the load becomes 5 cN/ ^cm2 . size.

In addition, in order to form the slit in the absorber 4, it is only necessary to partially cut the laminated body of the absorbent sheet by a known cutting mechanism. A cutting roll having a plurality of circumferentially extending cutting blades dispersedly formed in the circumferential direction and axial length direction; and an anvil roll receiving the cutting roll's blades.

In addition, examples of the water-absorbing polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, (isobutylene-maleic anhydride) Copolymers and their saponified products, polyaspartic acid, etc. In addition, the absorbent sheets constituting the absorbent body 4 are preferably all water-absorbent sheets containing a water-absorbent polymer, but a water-absorbent sheet containing a water-absorbent polymer may be mixed with a water-absorbent sheet not containing a water-absorbent polymer. combined to form a laminate of water-absorbent sheets constituting the absorber.

As the side sheet 10, various materials conventionally used in this technical field can be used without particular limitation, for example, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, etc. can be used. . Other materials include, for example, spunbonded nonwoven fabrics, sheets (such as SM, SMS, SMMS, etc.) obtained by combining spunbonded nonwoven fabrics (S) and meltblown nonwoven fabrics (M), hot rolled Water-repellent (hydrophobic) non-woven fabrics such as non-woven fabrics and air-through non-woven fabrics. It is particularly preferable to use a water-repellent air-through nonwoven fabric in terms of good skin feel and side leakage prevention.

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

For example, the excretory portion slit region S may be formed only in the excretory portion facing portion B, may extend from the excretion portion facing portion B to a part of the rear portion C, or may extend from the excretion portion facing portion B to a part of the front portion A and the rear. Part of Part C. In addition, the number of lamination|stacking of the absorbent sheet of the multilayer part 42 may be 2 sheets or 3 sheets instead of 4 sheets, and may be 5 sheets or more. In addition, the difference in the number of laminated sheets of the absorbent sheet of the multilayer part 42 and other parts may be 1 sheet or 3 sheets or more. In the linear groove formed by integrally recessing the front sheet 2 and the absorber 4 toward the back sheet 3 side, the distance between the front horizontal groove 53 and the vertical groove 51 and the distance between the rear horizontal groove 55 and the vertical groove 51 may be adjusted. Partitions or breaks are formed in the vertical grooves 51 instead of being formed in a complete ring shape.

In addition, the above-mentioned sanitary napkin 1 includes five types of vertical slits 43a to 43e that overlap with the vertical groove 51 as vertical slits overlapping with the vertical groove 51, but the absorbent article of the present invention may only include five types of vertical slits 43a to 43e. Any one of them may contain only 2, 3 or 4 in any combination.

8( a ) and FIG. 8( b ) are partially enlarged schematic plan views of an absorber showing other examples of the arrangement of longitudinal slits of the absorber that can be employed in the present invention.

The absorbent body 4A shown in FIG. 8( a ) includes many portions overlapping with the vertical grooves 51 on both sides of the excretory portion facing the region S, more specifically, on the outside of the central slit region S1 in the left and right directions. There are three longitudinal slits 43a, 43a' and a longitudinal slit 43f located outside the longitudinal groove 51. The vertical slits 43 a and 43 a ′ are formed in the front and rear of the portion where the distance between the pair of vertical grooves 51 is the smallest, and overlap the vertical grooves 51 substantially over their entire lengths.

The absorbent body 4B shown in FIG. 8( b ) includes many portions overlapping with the vertical grooves 51 on both sides of the excretory portion facing the area S, more specifically, on the outside of the central slit area S1 in the left and right directions. The longitudinal slits 43e, 43a, 43e' and the longitudinal slit 43f located on the outer side of the longitudinal groove 57. The substantially entire length of the vertical slit 43 a overlaps with the vertical groove 51 . The vertical slits 43 e and 43 e ′ are formed in the front and rear of the portion where the distance between the pair of vertical grooves 51 is the smallest, and a part of each overlaps the vertical grooves 51 .

In addition, the absorbers 4A and 4B shown in Fig. 8(a) and Fig. 8(b) each have a longitudinal slit 43h intersecting with the front lateral groove 52 at a position forward of the central slit area S1 in the longitudinal direction X, and There is a vertical slit 43 i intersecting the rear lateral groove 54 at a position rearward of the central slit region S1 .

Moreover, as an absorber, a well-known arbitrary absorber can also be used instead of the absorber containing an absorbent sheet. For example, it is also possible to use a structure in which a liquid-permeable covering sheet covers an absorbent core containing a fiber accumulation of fibers such as fluff pulp, or a mixed fiber accumulation of fibers and a water-absorbing polymer. As the liquid-permeable chip wrap, water-permeable sheets such as paper such as tissue paper, various nonwoven fabrics, and perforated films can be used.

Moreover, the absorbent article of this invention may be a sanitary pad (excretion pad), an incontinence pad, etc. other than a sanitary napkin.

Regarding the embodiment of the present invention described above, the following contents (absorbent article, etc.) are further disclosed.

<1> An absorbent article comprising an absorbent main body having a longitudinal direction corresponding to the front-back direction of a wearer and a transverse direction perpendicular to the longitudinal direction, the absorbent main body comprising: a liquid-retaining absorbent body; The front sheet on the skin-facing side of the absorber; and the back sheet arranged on the non-skin-facing side of the absorber, and the absorbent main body has: an excretion portion opposite to the wearer's excretion portion when worn. part; the front part arranged on the abdomen side of the wearer than the excretion part facing part; and the rear part arranged on the wearer's back side than the excretion part facing part. A pair of flaps respectively extending outward in the lateral direction from both sides of the excretion-facing portion in the longitudinal direction, the absorber has an excretion slit area in the excretion-facing portion, and in the excretion slit area, The longitudinal slits along the longitudinal direction are formed in two directions of the longitudinal direction and the lateral direction in a dispersed state, and a plurality of the longitudinal slits are arranged in a dispersed state in the central part of the lateral direction and the longitudinal direction in the excretion part slit area. The central slit area of the above-mentioned absorbent main body is respectively formed with longitudinal grooves formed by combining the above-mentioned front sheet and the above-mentioned absorber on the left and right outer sides of the above-mentioned central slit area. A vertical slit having a portion overlapping the vertical groove and a vertical slit positioned outside the vertical groove are provided.

<2> The absorbent article according to the above <1>, wherein, in front of the central slit region in the absorbent main body, the front horizontal groove formed by bonding the top sheet and the absorbent body is aligned with the longitudinal direction. The absorber is formed so as to extend in the intersecting direction, and the absorber has a longitudinal slit intersecting the front lateral groove at a position forward of the central slit region in the longitudinal direction.

<3> The absorbent article according to the above <2>, wherein the rear horizontal groove formed by joining the front sheet and the absorbent core is aligned with the longitudinal direction behind the central slit region of the absorbent main body. The absorber is formed so as to extend in a direction intersecting, and the absorber has the longitudinal slit intersecting the front lateral groove or the rear lateral groove.

<4> The absorbent article according to the above <3>, wherein the absorbent body has the vertical slit intersecting the front lateral groove and the vertical slit intersecting the rear lateral groove.

<5> The absorbent article according to any one of the above-mentioned <1> to <4>, wherein the absorbent body includes a laminate of absorbent sheets, and has a multi-layer part at the part facing the excretion part, and the multi-layer part It is a portion where the number of laminated sheets of the absorbent sheet is greater than that of the surrounding portion, the central slit region is formed in the multilayer portion, and the lengths of the respective transverse directions of the front lateral grooves and the rear lateral grooves are longer than those of the multilayer portion. The above-mentioned transverse length is short.

<6> The absorbent article according to any one of <1> to <5> above, wherein each of the longitudinal grooves, the front horizontal grooves, and the rear horizontal grooves has a highly compressed portion in the groove and a degree of compression greater than that of the vertical groove. The high-compression part is lower than the low-compression part. The shape of each high-compression part is such that the length of the longitudinal direction is longer than the length of the transverse direction in the above-mentioned longitudinal groove, and the length of the transverse direction is longer than the length of the longitudinal direction in the above-mentioned front transverse groove and the above-mentioned rear transverse groove. The length of the long shape.

<7> The absorbent article according to any one of the above <1> to <6>, wherein each width of the front horizontal groove and the rear horizontal groove is wider than the vertical groove.

<8> The absorbent article according to any one of <1> to <7>, wherein the periphery of the excretion portion slit region of the absorbent body is surrounded by an annular non-slit region having no slit.

<9> The absorbent article according to any one of the above <1> to <8>, wherein the vertical groove is formed so as to extend laterally from each of the front portion and the rear portion to the excretory portion facing portion. The inner side is concave in a curved shape, and the distance between the pair of longitudinal grooves is narrowest near the longitudinal center of the excretory part facing part, and has the widest parts at the front part and the rear part.

<10> The absorbent article according to any one of the above <1> to <9>, wherein the vertical grooves are formed in a curved shape having a plurality of curvatures.

<11> The absorbent article according to any one of the above-mentioned <1> to <10>, wherein the absorbent body includes a laminate of absorbent sheets, and has a multi-layer portion at the excretory portion-facing portion, and the multi-layer portion It is a part where the number of laminated sheets of the absorbent sheet is larger than that of the surrounding part, the central slit area is formed in the multilayer part, and the pair of vertical grooves are located outside the side edges of the multilayer part, It is formed in a shape curved convexly toward the multilayer portion side.

<12> The absorbent article according to any one of the above <1> to <11>, wherein the vertical slits having portions overlapping the vertical grooves are mixed with the slits overlapping the vertical grooves over the entire length of the slits. The longitudinal slit and the longitudinal slit overlapping with the above-mentioned longitudinal groove with a part of the slit.

<13> The absorbent article according to any one of the above <1> to <12>, wherein the absorbent body includes: a main absorbent body forming the outer shape of the absorbent body; An auxiliary absorber smaller than the main absorber.

<14> The absorbent article according to the above <13>, wherein the absorbent body is formed by arranging a folded structure of one absorbent sheet constituting the auxiliary absorbent body between two absorbent sheets constituting the main absorbent body. Structure.

<15> The absorbent article according to the above <14>, wherein one absorbent sheet constituting the main absorbent body is folded to form two absorbent sheets.

<16> The absorbent article according to the above <14> or <15>, wherein the absorbent sheet has a structure formed by bonding constituent fibers to each other.

<17> The absorbent article according to any one of the above <14> to <16>, wherein the absorbent sheet utilizes adhesive force generated in the water-absorbent polymer in a wet state or an adhesive agent added separately. A binder such as an adhesive fiber or the like binds the constituent fibers or the constituent fibers and the water-absorbent polymer to form a sheet.

<18> The absorbent article according to any one of the above <14> to <17>, wherein each of the absorbent sheets has a thickness of 0.1 mm to 2 mm.

<19> The absorbent article according to any one of the above <1> to <18>, wherein the sides of the absorbent main body facing the skin along the longitudinal direction X are separated from the absorbent body in plan view. A pair of side panels are arranged over the substantially entire length of the absorbent main body in the longitudinal direction X in such a way that the left and right sides of the longitudinal direction X are overlapped. A joining line and a linear second joining line located in the front and rear positions in the longitudinal direction X of the first joining line are joined to the above-mentioned absorbent main body at a position laterally inner than the first joining line and the second joining line. , the space part partitioned by the said side sheet and the said top sheet is formed.

<20> The absorbent article according to any one of the above <1> to <19>, wherein the length of the vertical slit in the excretion portion slit region is not less than 10 mm and not more than 35 mm.

<21> The absorbent article according to any one of <1> to <20> above, wherein the excretion portion slit region includes a slit row of two or more vertical slits arranged at intervals in the lateral direction. A plurality of longitudinal slits are arranged in the same slit row, and the intervals between the above-mentioned vertical slits in the same slit row are not less than 3 mm and not more than 20 mm.

<22> The absorbent article according to any one of <1> to <21> above, wherein the lateral length of the excretion portion slit region is 30% of the length in this direction of the absorbent body in the excretion portion facing portion. % or more and 85% or less.

<23> The absorbent article according to any one of the above <1> to <22>, wherein the lateral length of the excretory portion slit region is not less than 30 mm and not more than 55 mm.

<24> The absorbent article according to any one of the above <1> to <23>, wherein the absorbent body includes a laminated body of absorbent sheets, has a multi-layered portion at the portion facing the excretory portion, and the vertical groove and The distance between the two closest parts of the multi-layer part and the excretory part facing part is 7 mm or less.

<25> The absorbent article according to any one of the above <1> to <24>, wherein the absorbent body includes a laminated body of absorbent sheets, has a multi-layered portion at the portion facing the excretion portion, and the number of the absorbent body is large. The thickness of the layer portion is not less than 0.7 mm and not more than 5 mm.

<26> The absorbent article according to any one of <1> to <25> above, wherein the absorbent body includes a laminated body of absorbent sheets, has a multilayer part at the part facing the excretion part, and the multilayer part The thickness of the absorber portion other than 0.3 mm to 3 mm.

<27> The absorbent article according to any one of the above <1> to <26>, wherein the absorbent body includes a laminated body of absorbent sheets, and has a multilayer part at the part facing the excretion part, and the multilayer part has a multilayer part. The difference between the thickness and the thickness near the boundary between the part outside the multilayer part and the multilayer part is 2 mm or less.

<28> The absorbent article according to any one of the above <1> to <27>, wherein the absorbent article is a sanitary napkin.

(industrial availability)

According to the absorbent article of the present invention, it is possible to improve operability and wearing comfort when fastened by the flap portion, and also to prevent troubles such as wet feeling and liquid leakage due to the opening of the slit.

Claims (28)

1. an absorbent commodity, it comprises absorbent main body, and the longitudinal direction had corresponding to the fore-and-aft direction of wearer and the transverse direction orthogonal with this longitudinal direction, this absorbent main body comprises: the absorber of liquid retainability; Be configured in the positive dough sheet of the skin opposite face side of this absorber; With the back sheet of non-skin opposite face side being configured in this absorber, and this absorbent main body has: when wearing and the excretory portion counterpart that is oppositely disposed of the excretory portion of wearer; Be configured in than the front part of this excretory portion counterpart by the position of the veutro of wearer; With the rear quadrate part being configured in the position leaning on the dorsal part of wearer than this excretory portion counterpart, the feature of this absorbent commodity is:

Have from the both sides along the longitudinal of described excretory portion counterpart respectively to a pair tab portion that the outside of transverse direction is extended,

Described absorber has excretory portion gap zone in described excretory portion counterpart, in this excretory portion gap zone, described longitudinal direction and this both direction of described transverse direction is formed at the state of dispersion along described longitudinal longitudinal slot, the state that described horizontal and vertical central part in this excretory portion gap zone has to disperse is configured with the central gap zone of multiple described longitudinal slot

Described absorbent main body is formed respectively and combines between described positive dough sheet and described absorber and the pod formed outside the left and right two of described central gap zone,

Described absorber is respectively arranged with longitudinal slot with the part overlapping with described pod and the longitudinal slot be positioned at than this pod position in the outer part outside the left and right two of described central gap zone.

2. absorbent commodity as claimed in claim 1, is characterized in that:

The front of the described central gap zone in described absorbent main body, combine between described positive dough sheet and described absorber and the front translot that formed to be formed with the mode that extends on the described direction longitudinally intersected, described in the ratio of described absorber in described longitudinal direction, central gap zone position on the front has the longitudinal slot intersected with described front translot.

3. absorbent commodity as claimed in claim 2, is characterized in that:

The rear of the described central gap zone in described absorbent main body, combine between described positive dough sheet and described absorber and the rear translot that formed to be formed with the mode that extends on the described direction longitudinally intersected, described absorber has the described longitudinal slot intersected with described front translot or described rear translot.

4. absorbent commodity as claimed in claim 3, is characterized in that:

Described absorber has the described longitudinal slot intersected with described front translot and the described longitudinal slot intersected with described rear translot.

5. the absorbent commodity as described in claim 3 or 4, is characterized in that:

Described absorber comprises the laminated body of absorbability sheet, in described excretory portion counterpart, there is multi-layer portion, this multi-layer portion is the part that the laminated sheet number of absorbability sheet is more than the part be positioned at around it, described central gap zone is formed in this multi-layer portion, and described front translot and described rear translot described horizontal length is separately shorter than the described horizontal length of this multi-layer portion.

6. the absorbent commodity according to any one of claim 3 ~ 5, is characterized in that:

Described pod, described front translot and described rear translot have the degree of high compression portion and the compression low compression portion lower than this high compression portion respectively in groove, the shape of each high compression portion, be the shape that longitudinal length is longer than horizontal length in described pod, be the shape that horizontal length is longer than longitudinal length in described front translot and described rear translot.

7. the absorbent commodity according to any one of claim 4 ~ 6, is characterized in that:

Described front translot and described rear translot width separately wider than described pod.

8. the absorbent commodity according to any one of claim 1 ~ 7, is characterized in that:

The surrounding of the described excretory portion gap zone of described absorber is surrounded by the non-gap zone that there is not the ring-type of slot.

9. the absorbent commodity according to any one of claim 1 ~ 8, is characterized in that:

Described pod is formed as going and to the curve shape of horizontal inner side depression to described excretory portion counterpart along with from each of described front part and described rear quadrate part, the narrowest near the longitudinal central authorities being interposed between this excretory portion counterpart between a pair this pod, at front part and rear quadrate part, there is the widest part.

10. the absorbent commodity according to any one of claim 1 ~ 9, is characterized in that:

Described pod is made up of the curve shape with multiple curvature.

11. absorbent commodities according to any one of claim 1 ~ 10, is characterized in that:

Described absorber comprises the laminated body of absorbability sheet, in described excretory portion counterpart, there is multi-layer portion, this multi-layer portion is the part that the laminated sheet number of absorbability sheet is more than the part be positioned at around it, described central gap zone is formed in this multi-layer portion, described a pair pod, in the position in the outer part of the both side edges than described multi-layer portion, is formed as the shape bent projectedly to this multi-layer portion side.

12. absorbent commodities according to any one of claim 1 ~ 11, is characterized in that:

Have in described longitudinal slot of the part overlapping with described pod, mixing also exists with the total length of the slot longitudinal slot overlapping with described pod with a part for slot the longitudinal slot overlapping with described pod.

13. absorbent commodities according to any one of claim 1 ~ 12, is characterized in that:

Described absorber comprises: the main absorber forming the profile of this absorber; And stacked with a part for main absorber, more small-sized than main absorber additional absorbents.

14. absorbent commodities as claimed in claim 13, is characterized in that:

Described absorber be the structure of a slice absorbability sheet gained of described for folding formation additional absorbents is configured at form main absorber two panels absorbability sheet between and formed structure.

15. absorbent commodities as claimed in claim 14, is characterized in that:

A slice absorbability sheet forming described main absorber is folded and is formed as two panels absorbability sheet.

16. absorbent commodities as described in claims 14 or 15, is characterized in that:

Described absorbability sheet is structure formation fiber being bonded to each other and being formed.

17. absorbent commodities according to any one of claim 14 ~ 16, is characterized in that:

Described absorbability sheet utilizes the binding agent of the adherence force produced in the water absorbent polymer of moisture state or the bonding agent added in addition or cementability fiber etc., makes between formation fiber or forms between fiber and water absorbent polymer to combine, and be formed as lamellar.

18. absorbent commodities according to any one of claim 14 ~ 17, is characterized in that:

The thickness of the every a slice of described absorbability sheet is more than 0.1mm below 2mm.

19. absorbent commodities according to any one of claim 1 ~ 18, is characterized in that:

In the both sides of the X along the longitudinal of the skin opposite face of described absorbent main body, in the mode overlapping with the left and right sides portion of the X along the longitudinal of described absorber when overlooking, throughout this absorbent main body longitudinal X configure a pair lateral plate roughly endlong,

Lateral plate described in a pair respectively be positioned at described excretory portion counterpart wire the first closing line and be positioned at second closing line of wire of front and back position of longitudinal X of this first closing line, be engaged in described absorbent main body, leaning on the position of horizontal inner side than this first closing line and the second closing line, be formed with the spatial portion marked off by described lateral plate and described positive dough sheet.

20. absorbent commodities according to any one of claim 1 ~ 19, is characterized in that:

The length of the described longitudinal slot in described excretory portion gap zone is more than 10mm below 35mm.

21. absorbent commodities according to any one of claim 1 ~ 20, is characterized in that:

In described excretory portion gap zone, be included in the transversely spaced apart and slot of described longitudinal slot of more than 2 that is configuration capable be configured with in the vertical multiple, the described longitudinal slot in same slot is capable be spaced apart more than 3mm below 20mm.

22. absorbent commodities according to any one of claim 1 ~ 21, is characterized in that:

The length of the transverse direction of described excretory portion gap zone be the length in this direction of the described absorber in described excretory portion counterpart more than 30% and less than 85%.

23. absorbent commodities according to any one of claim 1 ~ 22, is characterized in that:

The length of the transverse direction of described excretory portion gap zone is more than 30mm below 55mm.

24. absorbent commodities according to any one of claim 1 ~ 23, is characterized in that:

Described absorber comprises the laminated body of absorbability sheet, has multi-layer portion in described excretory portion counterpart,

Described pod and described multi-layer portion both standoff distances closest to portion in described excretory portion counterpart are below 7mm.

25. absorbent commodities according to any one of claim 1 ~ 24, is characterized in that:

Described absorber comprises the laminated body of absorbability sheet, has multi-layer portion in described excretory portion counterpart,

The thickness of the multi-layer portion of described absorber is more than 0.7mm below 5mm.

26. absorbent commodities according to any one of claim 1 ~ 25, is characterized in that:

Described absorber comprises the laminated body of absorbability sheet, has multi-layer portion in described excretory portion counterpart,

The thickness of the absorber part beyond described multi-layer portion is more than 0.3mm below 3mm.

27. absorbent commodities according to any one of claim 1 ~ 26, is characterized in that:

Described absorber comprises the laminated body of absorbability sheet, has multi-layer portion in described excretory portion counterpart,

The thickness of described multi-layer portion and described multi-layer portion and be below 2mm than the thickness difference near this multi-layer portion portion boundary in the outer part.

28. absorbent commodities according to any one of claim 1 ~ 27, is characterized in that:

Described absorbent commodity is sanitary napkin.