TWI510223B - Absorbent items - Google Patents

Description

Absorbent article

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

In order to prevent side leakage of an absorbent article such as a menstrual napkin or an incontinence pad, it is conceivable to increase the absorbent capacity by making the width of the absorbent article or the absorbent body wider. However, in the case where only the width of the absorbent body is widened, the side portion of the absorbent body extends from the side edge of the crotch portion of the garment such as a shorts, and the workability when the wing portion is folded to the crotch portion is fixed. Deterioration, or wrinkles in the portion protruding from the crotch portion to deteriorate the wearing feeling. Wrinkles are not deformations that are produced for the purpose of improving performance such as conformity, but are not ideal deformations.

Further, a technique of forming a slit or an opening in an absorbent body is known.

For example, Patent Document 1 discloses that slits having a specific length of four or more rows are formed at specific intervals in portions other than the periphery of the absorber.

Further, Patent Document 2 discloses that a plurality of slit portions are formed in a low rigidity portion surrounded by a joint pattern in which a front sheet and a liquid absorbing layer are joined.

Prior technical literature Patent literature

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

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

The present inventors have studied the formation of a slit in a dispersed state of the absorbent body to improve the flexibility of the absorbent body, and it has been found that when the absorbent body is formed into a slit, it is stretched on one side. When the wing portion is fixed to the crotch portion, the slit is opened, and the front sheet is separated from the absorbent body to cause absorption hindrance. Therefore, there is a problem that the excretion liquid which cannot smoothly move to the absorbent body remains on the front side. The sheet gives the wearer a moist feeling or a liquid volume to cause the liquid to flow on the surface of the front sheet to easily leak liquid.

In the slits formed in the absorbent body, the slits formed along the longitudinal direction of the absorbent body and the slits formed along the width direction are individually disclosed in the slits of the absorbent body, and the slits along the longitudinal direction are separately disclosed. The cross-over and the absorbent body are formed continuously over substantially the entire length. That is, the absorbent body is provided with slits along the longitudinal direction thereof, and wrinkles extending along the longitudinal direction of the absorbent article are easily generated, and the wrinkles cause the wearer to feel uncomfortable or cause leakage. .

The technique of Patent Document 2 is a technique for reinforcing the strength of the liquid absorbing layer by reinforcing the low rigidity portion with the front sheet. Further, Patent Document 2 does not describe a method for improving the workability and wearing feeling when the wing portion is fixed, and also preventing the problem caused by the opening of the slit.

Accordingly, the present invention is directed to an absorbent article that solves the problems of the prior art.

The present invention relates to an absorbent article comprising an absorbent body comprising a liquid-retaining absorbent body, a front sheet disposed on a skin facing surface side of the absorbent body, and an absorbent body disposed on the absorbent body The non-skin-facing side back sheet has an excretory portion facing portion that is disposed opposite to the wearer's excretion portion at the time of wearing, and is disposed before the ventral portion of the excretory portion facing the wearer The square portion and the rear side portion disposed closer to the wearer than the opposite portion of the excretion portion have a longitudinal direction corresponding to the front and rear directions of the wearer and a transverse direction orthogonal thereto. The absorbent article has one of a pair of wing portions extending outward from the laterally opposite sides of the opposing portion of the excretory portion toward the laterally outer side. The absorber has a drain portion slit region in the opposing portion of the drain portion, and the drain portion slit region is formed in a state in which the slit is formed in the longitudinal direction and the lateral direction along the longitudinal slit. The central portion of the lateral direction and the longitudinal direction in the slit region of the drain portion has The central slit region is formed by arranging the longitudinal slits in a plurality of dispersed states. The absorbent main body has a longitudinal groove formed by joining the front surface sheet and the absorbent body to each of the left and right outer sides of the central slit region. Each of the absorbers on the left and right outer sides of the central slit region includes a longitudinal slit having a portion overlapping the longitudinal groove and a longitudinal slit located outside the longitudinal groove.

1‧‧‧Sanitary cotton

2‧‧‧Front sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

4A‧‧‧ absorber

4B‧‧‧ absorber

5‧‧‧Absorbing ontology

6‧‧‧Flanking

7‧‧‧wings

10‧‧‧Side sheet

11‧‧‧1st bonding wire

12‧‧‧2nd bonding wire

40‧‧‧Main absorber

41‧‧‧Assistant absorber

42‧‧‧Multi-layer

43‧‧‧ longitudinal slit

43a‧‧‧Long slit

43a'‧‧‧ longitudinal slit

43b‧‧‧ longitudinal slit

43c‧‧‧ longitudinal slit

43d‧‧‧ longitudinal slit

43e‧‧‧long slit

43e'‧‧‧ longitudinal slit

43f‧‧‧long slit

43g‧‧‧ longitudinal slit

43h‧‧‧ longitudinal slit

43i‧‧‧ longitudinal slit

51‧‧‧ longitudinal slot

52‧‧‧ front transverse groove

53‧‧‧2nd front transverse groove

54‧‧‧ rear transverse slot

55‧‧‧2nd rear transverse groove

56‧‧‧High compression department

57‧‧‧Longitudinal slot

401‧‧‧Absorbable sheet

402‧‧‧Absorbable sheet

403‧‧‧Absorbable sheet

A‧‧‧ front section

B‧‧‧Excretion Department

C‧‧‧ Rear

L‧‧‧ vertical

L1‧‧‧ length

L2‧‧‧ length

L4‧‧‧ length

L5‧‧‧ interval

L6‧‧‧ length

L7‧‧‧ length

L8‧‧‧ length

L9‧‧‧ length

L10‧‧‧ length

N‧‧‧Non-slit area

P‧‧‧ interval

R1‧‧‧ slit line

R2‧‧‧ slit line

S‧‧‧Drain section slit area

S1‧‧‧central slit area

W‧‧‧Width

X‧‧‧ portrait

Y‧‧‧ horizontal

Fig. 1(a) is a plan view showing the skin facing surface side (front sheet side) of the menstrual napkin as an embodiment of the absorbent article of the present invention, and Fig. 1(b) shows only the menstrual napkin. Top view of the extraction of the absorber.

Figure 2 is a schematic cross-sectional view taken along line II-II of Figure 1.

Fig. 3 is a plan view showing the positional relationship between the longitudinal slits and the longitudinal grooves and the lateral grooves in the absorbent body of the menstrual napkin shown in Fig. 1.

4(a) and 4(b) are partially enlarged plan views showing the absorbent body in a preferred arrangement of the slits in the slit portion of the excretion portion.

Fig. 5 (a) and Fig. 5 (b) are partially enlarged plan views showing the absorber of the other arrangement of the slits in the slit portion of the excretion portion.

Fig. 6 is an enlarged plan view showing a preferred configuration of the longitudinal groove, the front lateral groove, and the rear lateral groove.

7(a) to 7(d) are schematic cross-sectional views showing an auxiliary absorber of another example of the folding method of the absorbent sheet.

Figs. 8(a) and 8(b) are partially enlarged plan views showing an absorbent body of another example of the arrangement of the longitudinal slits of the absorbent body which can be used in the present invention.

Hereinafter, the absorbent article of the present invention will be described based on a menstrual sanitary napkin as an embodiment of the preferred embodiment with reference to the drawings. As shown in FIG. 1 and FIG. 2, the sanitary napkin 1 of the present embodiment includes an absorbent body 4 having liquid retainability and a skin pair disposed on the absorbent body 4. The front side sheet 2 on the front side and the absorbent body 5 disposed on the back sheet 3 on the non-skin facing side of the absorber 4 have a longitudinal direction X corresponding to the front and rear directions of the wearer and are orthogonal thereto Horizontal Y.

Further, in the present specification, the skin-facing absorbent article or the constituent member (for example, the absorbent main body 5) is worn toward the skin side of the wearer when the absorbent article is worn, and the non-skin opposite surface is absorbed. In the case of wearing the absorbent article in the sexual article or its constituent member, it faces the side opposite to the skin side (dressing side). 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 absorbent body 5 has a drain portion facing portion B that is disposed opposite the liquid draining portion (vaginal opening or the like) of the wearer when worn, and a front portion A that is disposed at a portion of the drain portion when worn. The portion B is further placed on the ventral side (front side) of the wearer; and the rear portion C is disposed on the back side (rear side) of the wearer facing portion B at the time of wearing.

The sanitary napkin 1 further has a pair of wing portions 7, 7 in addition to the absorbent body 5, the pair of wing portions 7, 7 from the absorbent portion 5 in the absorbent body 5 opposite to the longitudinal direction X Each of the side portions is extended toward the outer side of the lateral direction Y.

Further, in the absorbent article of the present invention, the opposing portion of the excretory portion is a region having a wing portion in the longitudinal direction of the absorbent article (the longitudinal direction of the absorbent article, the X direction in the drawing) (by the wing portion) The area between the root of one side of the longitudinal direction and the root of the other side).

As shown in Fig. 2, the front sheet 2 covers the entire area of the skin facing surface of the absorbent body 4, and is further extended from the both side edges of the longitudinal direction X of the absorbent body 4 toward the outer side of the lateral direction Y. On the other hand, the back sheet 3 covers the entire area of the non-skin opposing surface of the absorbent body 4, and further extends from the both sides of the longitudinal direction X of the absorbent body 4 toward the outer side of the lateral direction Y, and the side portions described below The sheet 10 collectively forms the side flap portion 6. The back sheet 3 and the side sheet 10 are joined to the outer edge of the self-absorbing body 4 along the side edges of the longitudinal direction X, and are joined to each other by a known joining method such as an adhesive, heat sealing, or ultrasonic sealing. Each of the front sheet 2 and the back sheet 3 and the absorber 4 It can also be joined by an adhesive.

As shown in FIG. 2, the absorbent body 4 of the present embodiment includes a laminate of the absorbent sheets 401 to 403, and has a multilayer portion 42 in the opposing portion B of the excretion portion as shown in FIGS. 1 and 2 . As shown in Fig. 2, the multilayer portion 42 is a portion in which the number of laminated sheets constituting the absorbent sheet 4 is larger than the portion around the absorbent sheet. In the present embodiment, the thickness of the multi-layered portion 42 is also thicker than the portion located around the portion, and the bulging portion is formed on the side of the front sheet 2 (the skin facing side of the napkin 1). . Further, the absorber 4 includes a main absorber 40 which forms an outer shape of the absorber 4, and an auxiliary absorber 41 which is partially overlapped with one of the main absorbers 40 and which is smaller than the main absorber 40. The main absorbent body 40 includes two absorbent sheets 401 and 402 having the same shape and the same size, and the absorbent sheets 401 and 402 are substantially rectangular in shape in a plan view and are opposed to the front portion A through the drain portion. The portion B extends over the rear portion C, and the auxiliary absorber 41 is formed in a substantially rectangular shape in plan view, and is disposed from the excretion portion facing portion B to the vicinity portion C in the vicinity thereof. The auxiliary absorbent body 41 is formed by folding one sheet of the absorbent sheet 403 into a two-layer structure, and is disposed between the two sheets of absorbent sheets 401 and 402 constituting the main absorbent body 40. By arranging the auxiliary absorber 41 in one of the main absorbers 40, the absorption capacity of a portion of the absorber 4 can be easily and efficiently increased. The auxiliary absorbent body 41 can be laminated on the skin facing surface side of the absorbent sheet 401 which constitutes the upper side of the main absorbent body 40, and can also be laminated on the non-skin direction of the absorbent sheet 402 which constitutes the lower side of the main absorbent body 40. The surface side is disposed between the two sheets of absorbent sheets 401 and 402 constituting the main absorbent body 40 instead. Further, the absorbent sheets may not be joined, and may be followed by a sparsely spread adhesive or the like.

As shown in FIGS. 1 and 2, the pair of side sheets 10, 10 are formed on both sides of the longitudinal direction X of the skin facing surface of the absorbent body 5 (the skin facing surface of the front sheet 2). The absorber body 4 is disposed so as to overlap the longitudinal direction X of the absorbent body 5 in a plan view so as to overlap the left and right sides of the absorbent body 4 in the longitudinal direction X. The pair of side sheets 10 and 10 are respectively preceded by the first bonding wire 11 in the line shape of the opposing portion B of the drain portion and before the longitudinal direction X of the first bonding wire 11 The linear second bonding wires 12 of the rear (front portion A and rear portion C) are joined to the absorbent main body 5 (front sheet 2). The first bonding wire 11 is curved in a plan view toward the outer side in the lateral direction Y, and the second bonding wire 12 is linear (saw-toothed) extending in a plan view so as to intersect the vertical direction. The side sheet 10 contains a water-repellent non-woven fabric. If the side sheet 10 is joined to the skin facing surface (front sheet 2) of the absorbent body 5 by the bonding wires 11 and 12 as described above, as shown in FIG. 2, the bonding wires 11 and 12 are more A space portion P defined by the side sheet 10 and the front sheet 2 is formed on the inner side of the lateral direction Y. Since the space portion P is opened toward the center of the lateral direction Y of the absorbent body 5, excretory fluid such as menstrual blood flowing from the center of the lateral direction Y to the outside is accommodated in the space portion P, and as a result, the excretion liquid is effectively prevented from leaking out.

As shown in FIG. 1, the side flap portion 6 protrudes to a greater extent toward the outer side of the lateral direction Y of the excretory portion opposing portion B, whereby a pair of wings extend along the left and right sides of the longitudinal direction X of the absorbent body 5. Shapes 7, 7. Further, as shown in Fig. 1, the front sheet 2 and the back sheet 3 are extended from the front end and the rear end of the longitudinal direction X of the absorber 4 to the outer side of the longitudinal direction X, and are extended at the outer portion thereof, by A known joining method such as a agent, a heat seal, or an ultrasonic seal is joined to each other to form an end seal portion.

The wing portion 7 is folded back to the non-skin opposing side of the crotch portion of the garment worn by the shorts or the like. As shown in FIG. 1, the wing portion 7 has a substantially trapezoidal shape on the side of the side of the absorbent body 5 in a plan view having a lower bottom (the side longer than the upper base). A wing-shaped adhesive portion (not shown) for fixing the wing-shaped portion 7 (sanitary napkin 1) to a garment (not shown) worn by a pair of pants or the like is formed on the non-skin opposing surface of the wing portion 7. By the wing-shaped adhesive portion, the wing portion 7 which is folded back toward the non-skin opposing surface (outer surface) side of the crotch portion of the worn garment can be adhered and fixed to the crotch portion. Further, a non-skin opposing surface of the absorbent body 5 is also provided with a body adhesive portion (not shown) for fixing the absorbent body 5 to a garment worn by a pair of shorts or the like.

As shown in FIG. 1 and FIG. 2, the skin facing surface (the skin facing surface of the front sheet 2) of the absorbent main body 5 is formed with the front sheet 2 and the absorbent body 4 integrally recessed toward the back sheet 3 side. Made of linear grooves. The linear groove front sheet 2 and the absorbent body 4 are integrally pressed to form an embossed groove, and include: a pair of longitudinal grooves 51, 51 which are equal to the discharge portion facing portion B extending in the longitudinal direction X; The lateral groove 52 and the second front lateral groove 53 are located at the front portion A and extend in the lateral direction Y, respectively, and the rear lateral groove 54 and the second rear lateral groove 55 are located at the rear portion C and extend in the lateral direction Y, respectively. The linear grooves can be formed by a conventional method by embossing processing such as compression processing (so-called embossing) or ultrasonic embossing with or without heat. In the linear groove, although not shown, the front sheet 2 and the absorber 4 are pressure-bonded via an adhesive or integrated (bonded) by heat fusion or the like. The expression of the bond between the front sheet 2 and the absorbent body 4 also includes a case where another sheet such as a second sheet is interposed between the front sheet 2 and the absorbent body 4, and the front sheet is placed. The other sheet is joined to the other sheet and joined (bonded) to the absorber 4.

Such a linear groove can suppress the diffusion of the liquid in the plane direction of the absorbent body 4, thereby effectively preventing the liquid from leaking from the periphery of the sanitary napkin 1. The width of the linear groove (the length in the direction orthogonal to the longitudinal direction) and the depth may be set in the same manner as the linear groove in the absorbent article. Further, the "line shape" in the linear groove, the shape of the groove (depression portion) is not limited to a straight line in plan view, and includes a curved line, and each line may be a continuous line or a broken line. For example, the linear grooves may also include a plurality of discrete embossing lines. Further, as shown in Fig. 1, the sanitary napkin 1 of the present embodiment is formed to be bilaterally symmetrical with respect to a center line (not shown) that divides the absorbent body 5 into two portions in the lateral direction Y.

As shown in Fig. 1, the vertical groove 51 is formed with a pair of center lines (not shown) which divide the absorbent body 5 into two portions in the lateral direction Y, and the pair of longitudinal grooves 51, 51 are formed with the center line. Symmetrical about the reference. The pair of vertical grooves 51 and 51 extend not only to the excretion portion opposing portion B but also to the front portion A and the rear portion C from the excretion portion opposing portion B, and the excretion portion opposing portion B to the multi-layer portion 42. The outer side of the lateral direction Y extends in the longitudinal direction X. Further, in the sanitary napkin 1 of the present embodiment, the vertical groove 51 has a curved shape which is recessed toward the lateral direction from the front portion A and the rear portion C toward the drain portion facing portion B. Therefore, the pair of longitudinal grooves 51, 51 are spaced apart from the drain The portion facing the portion B is the narrowest in the vicinity of the longitudinal center, and has the widest portion at the front portion A and the rear portion B.

The front lateral groove 52 and the second front lateral groove 53 are convexly curved toward the front end of the longitudinal direction X of the absorbent body 5 in plan view, and the rear lateral groove 54 and the second rear lateral groove 55 are oriented toward the absorbent body in plan view. The longitudinal end of the longitudinal direction X of 5 is convexly curved. The convex top of each of the lateral grooves 52 to 55 is located at the center of the lateral direction Y of the absorbent body 5. The pair of vertical grooves 51 and 51 are connected to the end portions of the second front lateral groove 53 and the second rear lateral groove 55 in the longitudinal direction thereof, whereby the skin facing surface of the absorbent body 5 is formed in a plan view. Slot.

As shown in Fig. 1 and Fig. 3, the absorbent body 4 of the sanitary napkin 1 of the present embodiment has a drain portion slit region S in the drain portion opposing portion B, and the drain portion slit region S is longitudinally along the longitudinal direction X. The slit 43 is formed in a state of being dispersed in two directions of the longitudinal direction X and the lateral direction Y. The vertical slits 43 are formed in the multi-layer portion 42 of the excretion portion opposing portion B and the portions other than the multi-layer portion 42. Further, the excretory portion slit region S spans not only the excretory portion opposing portion B but also one of the front portion A and the rear portion C.

The slits 43 are formed by cutting the slits in the thickness direction of the absorber 4, and are formed by slits having substantially no width, or a space of a narrow width of preferably 1.0 mm or less. 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 is preferably a laminated body that penetrates the absorbent sheet constituting the absorbent body 4. The vertical slits 43 are preferably not formed on the front sheet 2 and the back sheet 3 disposed above and below the absorber 4, and are not formed in the nonwoven fabric which may be disposed between the front sheet 2 and the absorber 4. The second sheet (not shown).

Further, the absorbent body 4 of the sanitary napkin 1 of the present embodiment has a central slit region S1 in the central portion of the lateral direction Y and the longitudinal direction X in the excretion portion slit region S, and the central slit region S1 is disposed in the longitudinal slit 43. It is made up of a plurality of scattered states. The central slit region S1 is located between the pair of longitudinal grooves 51, 51 in the lateral direction Y, and is located at the front lateral groove 52 and the rear transverse groove in the longitudinal direction X. The area between 54. In other words, the vertical grooves 51 and 51 are located on the left and right outer sides of the central slit region S1, and the front lateral groove 52 and the rear lateral groove 54 are located on the front outer side before the central slit region S1. Further, in the present embodiment, the central slit region S1 is in the same range as the multilayer portion 42. As shown in Fig. 3, in the present embodiment, the front lateral groove 52 is located at the front portion A, and the rear lateral groove 54 is located at the rear portion C. Further, the front lateral groove 52 is located further forward than the front end of the plurality of layer portions 42, and the rear lateral groove 54 is located further rearward of the rear end portion of the plurality of layer portions 42.

The arrangement of the slits 43 in the drain portion slit region S is not particularly limited as long as the longitudinal slits 43 are dispersed in the longitudinal direction X and the width direction Y. However, the arrangement is preferably as follows. As shown in 1(b), the longitudinal line L including the plurality of longitudinal slits 43 along the longitudinal X series of the sanitary napkin 1 (absorbent article) is formed with a plurality of rows in the lateral direction Y, and adjacent to each other in the lateral direction The positions of the longitudinal directions X of the longitudinal slits 43 in the wales are inconsistent.

An example of a preferred arrangement of the slits in the drain portion slit region S is shown in FIG. In the central slit region S1, it is preferable that four or more slits are dispersedly arranged.

In the arrangement shown in Figs. 4(a) and (b), slit rows R1, R2 including a plurality of longitudinal slits 43 partitioned in the lateral direction Y of the sanitary napkin 1 are formed with a plurality of rows in the longitudinal direction X of the sanitary napkin 1. . In Fig. 4, a slit row R1 including two longitudinal slits 43 partitioned in the lateral direction Y and a slit row R2 including three longitudinal slits 43 partitioned in the lateral direction Y are alternately formed in the longitudinal direction X. For example, in the central slit region S1 in the present invention, it is preferable that at least the slits including the two longitudinal slits separated by the lateral direction Y are formed in two rows in the longitudinal direction X. Further, in the central slit region S1, the slit row is preferably formed in three or more rows in the longitudinal direction X, more preferably four rows or more, and more preferably five rows or more. Further, the number of the slits included in the slit X in the lateral direction X is preferably two or more, and more preferably three or more.

Preferably, in the longitudinal direction X of the slit portion S of the excretory portion, in addition to the slit row included in the central slit region S1, each of the longitudinal X before and after the longitudinal slit X of the central slit region S1 also has one or two rows. The above slit line.

In the preferred configuration of the longitudinal slit shown in FIG. 4, in the longitudinal X phase of the sanitary napkin 1. There is no interval P between the adjacent slit rows. That is, the interval P shown in FIG. 5(a) is not provided between the two slit rows R1 and R2 adjacent in the longitudinal direction X. In the expression in which there is no space P between adjacent slit rows, the positions of the end portions of the slits 43 including the slit rows adjacent to each other as shown in FIG. 4(a) are identical, and FIG. 4 (b) The adjacent slits are shown as being repeated in the longitudinal direction X. As shown in FIG. 4(b), when the two slit rows are arranged in the longitudinal direction X in a state in which one of the slit rows is repeated, the repeated length L1 is preferably the longitudinal slit constituting the slit row. The length X of the direction X is 20% or less, preferably 10% or less.

In the preferred embodiment of the longitudinal slit shown in Fig. 4, the position of the slit in the slit row adjacent to the longitudinal direction X of the sanitary napkin 1 is shifted in the lateral direction Y of the absorbent article. As shown in FIG. 4(a) and FIG. 4(b), the longitudinal slit 43 of the two slit rows R1 and R2 adjacent in the longitudinal direction X is preferably a slit 43 of the slit row R1 located at the other The central portion between the slits 43 of the slit row R2 may be formed by biasing the slit 43 of one slit row R1 toward either side of the slit 43 of the other slit row R2. Fig. 5(b) is a view showing an example in which the positions of the slits of the slit rows R1 and R2 adjacent in the longitudinal direction X are not shifted in the lateral direction Y.

Further, in the case where the interval P is provided between the slit rows adjacent to the longitudinal direction X of the sanitary napkin 1 as in the example shown in Fig. 5 (a), the interval P is preferably a longitudinal slit constituting the slit row. The longitudinal direction X of 43 is 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 Fig. 1 and Fig. 3, the absorbent body 4 of the sanitary napkin 1 of the present embodiment is each of the left and right sides of the drain portion slit region S, and more specifically, the left and right outer sides of the central slit region S1. A plurality of longitudinal slits 43a to 43e having a portion overlapping the vertical groove 51 are included. Specifically, the slits 43a and 43c that overlap the vertical groove 51 over substantially the entire length, and the slits 43b, 43d, and 43e that partially overlap the vertical groove 51 exist. More specifically, in the case where the vertical groove 51 is formed of a curved shape having a plurality of curvatures as in the present embodiment, the portion having a larger curvature is, for example, the slit 43a, and the slit portion of the vertical groove 51 is slit. The front cross section is inclined in the oblique direction, and one side overlaps over substantially the entire length of the slit, and on the other hand, the portion having a small curvature The slit is 43c, and the longitudinal direction of the vertical groove 51 substantially coincides with the longitudinal direction of the slit, and overlaps over the entire length of the slit.

Further, as shown in FIG. 1 and FIG. 3, the absorbent body 4 of the sanitary napkin 1 of the present embodiment is located outside the longitudinal groove 51 on the outer side and the outer side of the center slit region S1, and has a longitudinal groove. 51 overlapping longitudinal slits 43f, 43g. Further, in the longitudinal direction of the sanitary napkin 1, the front side of the central slit region S1 is further forward, and has a longitudinal slit 43h which intersects with the front lateral groove 52, and is located further in the longitudinal direction of the sanitary napkin 1 than the central slit region S1. Rear, there is a longitudinal slit 43i that intersects the rear lateral groove 54.

By arranging the slits that overlap the vertical grooves 51, the slits on the outer side of the longitudinal grooves 51 in the lateral direction Y of the sanitary napkin 1 and the slits on the inner side of the longitudinal grooves 51 can be appropriately suppressed (the central slit) The opening of both of the slits of the region S1. Further, the slit overlapping the vertical groove 51 can maintain the central slit region S1 by suppressing the influence of the wrinkles generated from the region outside the longitudinal groove 51 to the inner side of the longitudinal groove 51. Softness, or the object is easy to conform to the body. On the other hand, according to this configuration, both the conformability of the sanitary napkin 1 along both sides in the longitudinal direction X and the operability of the wing portion can be improved. From the viewpoint of further obtaining such effects, the vertical slits 43 and the vertical grooves 51 preferably partially overlap each other as compared with the entire length of the slit. In this regard, the longitudinal groove 51 in the central slit region S1 preferably has a wavy shape having a curved portion or a curved portion or a gentle shape as shown in FIG. 3 as compared with the shape of a straight line parallel to the longitudinal slit 43. The groove shape of the inclined portion.

According to the sanitary napkin 1 of the present embodiment, the absorbent body 4 has the excretion portion slit region S in the excretion portion opposing portion B, and the excretion portion slit region S is formed in the longitudinal direction by a plurality of longitudinal slits 43 in the longitudinal direction. And a state in which the two directions of the lateral direction Y are dispersed, and the longitudinal slits 43f and 43g which are located outside the longitudinal grooves 51 and 51 and do not overlap the longitudinal grooves 51 are provided on both sides of the absorber 4, Therefore, when the wing portions 7 and 7 are folded to the crotch portion of the garment such as the shorts, the side portions of the absorbent body 4 are flexibly deformed by the longitudinal slits of the respective portions, so that when the wing portions are fixed, Excellent workability. At this time, since the longitudinal groove 51 is located in the longitudinal slit Since 43f and 43g are further on the inner side, the rigidity of the slit portion can be improved by the rigidity thereof, and deformation of other portions can be suppressed. Further, since the longitudinal slits 43a to 43e overlapping the vertical grooves 51 are provided on both sides of the central slit region S1, the portion of the absorbent body 4 having the longitudinal grooves 51 in the lateral direction Y is also easily deformed, so that the wing shape is formed. 7, 7 is more excellent in operability when it is fixed to the crotch portion of the shorts or the like. In particular, in the opposing portion B of the excretory portion, it is preferable that the operability of the airfoil 7 and 7 is improved by the vertical slits 43f and 43g which are not overlapped with the vertical groove 51, as shown in FIG. The vertical groove 51 has a curved shape that is convex toward the inside.

Further, in the sanitary napkin 1 of the present embodiment, before and after the center slit region S1, the slits 43h and 43i intersecting the front lateral groove 52 or the rear lateral groove 54 and the second slit region S1 are further provided. The side has longitudinal slits 43a to 43e overlapping the longitudinal grooves 51. Therefore, the portion of the absorbent body 4 having the front lateral groove 52 and the rear lateral groove 54 in the longitudinal direction X or the longitudinal groove 51 in the lateral direction Y is also Since it is easy to deform, the operability in fixing the wing shapes 7, 7 to the crotch portion of the shorts or the like is further improved. Moreover, such a configuration can also effectively prevent wrinkles from occurring on the side portions of the absorbent body 4, and the sanitary napkin 1 of the present embodiment is also excellent in wearing feeling. On the other hand, when there is no longitudinal slit on the outer side of the longitudinal grooves 51 and 51, the position of the absorber 4 is largely deformed at the position of the longitudinal groove 51, and wrinkles are likely to occur on the side of the absorbent body 4. .

The excretory portion slit region S may extend from the excretory portion opposing portion B to at least one of the front portion A and the rear portion C, and the excretory portion slit region S is also preferably located at the front portion A and the rear portion C. There is a longitudinal slit that overlaps the longitudinal groove 51.

Further, in the sanitary napkin 1 of the present embodiment, the vertical slits 43 are disposed at positions overlapping the respective positions or partially or completely at the respective positions of the front lateral groove 52, the rear lateral groove 54, and the vertical groove 51. . Therefore, even if tension is applied to the sanitary napkin 1 in the lateral direction Y, the opening of the slits can be suppressed by combining the front sheet 2 or the second sheet disposed therebelow on both sides of each slit. . Further, by suppressing the openings of the vertical slits 43h and 43i that intersect the front lateral groove 52 and the rear lateral groove 54, the opening of the longitudinal slit 43 located in the central slit region S1 is also suppressed to some extent. Therefore, it is easy to prevent the production of the longitudinal slits of the respective sections. The absorption of the raw material is hindered, so that the wearer feels moist or leaks due to the liquid remaining on the front sheet.

The absorbent body 4 preferably has one or two or more of the following points in terms of obtaining the above-described effects and the like.

The length L2 (see FIG. 4) of the slits 43 in the drain portion slit region S is preferably 10 mm or more, more preferably 15 mm or more, further preferably 35 mm or less, and further preferably 25 mm or less. It is preferably 10 to 35 mm, and more preferably 15 to 25 mm.

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

The length L4 (see FIG. 1) of the lateral direction Y of the excretory portion slit region S is preferably 30% or more, and more preferably 40% or more of the length of the absorbent body 4 in the direction of the absorbent portion 4 in the excretory portion. Further, it is preferably 85% or less, and more preferably 75% or less. The length L4 of the lateral direction Y of the excretory portion slit region S is preferably 30 mm or more, more preferably 40 mm or more, further preferably 55 mm or less, and further preferably 45 mm or less.

In FIG. 1(b), in order to avoid the vertical slit 43 and the single-point chain line indicating the slit portion S of the excretion portion, it is difficult to see in any direction in the longitudinal direction X and the lateral direction Y, in other words, the ease of observation is observed. From the viewpoint of the convenience, the excretion slit region S is expressed by a range slightly larger than the range in which the longitudinal slits 43 are distributed. However, the excretory portion slit region S in the present invention is a range in which the longitudinal slits 43 are distributed, and the length L4 of the lateral direction Y is outside the longitudinal slits 44 at both ends of the lateral direction Y as shown in Fig. 1(b). The distance between the edges.

The number of the longitudinal slits 43 that overlap the entire longitudinal groove 51 may be one in each of the outer sides of the central slit region S1, but it is preferably plural, and more preferably three or more. Further, in terms of both the operability and the absorptivity of the airfoil, the absorber 4 preferably includes a longitudinal slit having a portion overlapping the longitudinal groove 51 and a portion not overlapping as the longitudinal groove 51. Overlapping longitudinal slits.

Further, in each of the outer sides of the central slit region S1, the number of the longitudinal slits located outside the longitudinal grooves 51 may be one, but it is preferably plural. In terms of improving the leakage preventing effect, it is preferable that the longitudinal slits 43f and 43g located outside the longitudinal groove 51 are formed at the inner side end of the article and the longitudinal groove 51 of the side sheet 10 illustrated in Fig. 2 . The area between.

Further, the number of the vertical slits 43h intersecting the front lateral grooves 52 and the longitudinal slits 43i intersecting the rear lateral grooves 54 may be one, but preferably plural, and preferably each It is more than three. In this case, if the longitudinal slits 43h and 43i which intersect with the lateral grooves 52 and 54 are one or more on both sides in the longitudinal direction of the lateral groove, the wrinkle suppression effect is high, which is preferable. Further, it is preferable that the front lateral groove 52 and the rear lateral groove 54 cross the vertical slit 43h or the vertical slit 43i in a cross shape instead of intersecting in a T shape.

As shown in Fig. 1(b), the absorbent body 4 of the sanitary napkin 1 of the present embodiment is surrounded by the annular non-slit region N in which the slit portion S of the excretory portion is not present.

By surrounding the periphery of the drain portion slit region S by the non-slit region N, it is possible to surely prevent liquid leakage due to penetration of liquid along the longitudinal slit.

Further, in the sanitary 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 vertical slit 43h intersects before the horizontal groove 52 and the longitudinal slit 43i intersect. The lengths L6, L7 of the lateral direction Y of the groove 54 are shorter than the length L8 of 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 lateral direction Y of the multilayer portion 42, respectively, it is possible to suppress the intersection with the lateral grooves 52, 54 at the center in the width direction of the absorbent body 4. The longitudinal slits 43h and 43i or the slits of the longitudinal slits located in the central slit region S1 between the lateral grooves 52 and 54 satisfactorily maintain the conformability of the side portions. Since the multilayer portion 42 faces the excretion portion, it is preferable that the excretion liquid is absorbed into the inside of the absorbent body as quickly as possible. Therefore, the lateral grooves 52, 54 are formed so as not to overlap with the longitudinal slits 43h, 43i located before and after the multilayer portion, so that the slits on the multilayer portion 42 are excessively opened to cause absorption resistance. hinder. When the excretion liquid is absorbed by the front sheet, it permeates into the absorber. However, if it is excessively opened, the portion which is not incident on the front sheet by the absorber is increased. Therefore, the migration of the liquid from the excrement to the absorber cannot be smoothly performed. By making the length L7 of the lateral groove 54 shorter than the length L8 of the lateral direction Y of the multilayer portion 42, the hardness of the lateral grooves 52, 54 is hardly felt by the user, and it is difficult to suppress the side of the absorbent body formed outside the multi-layered portion. The opening of the longitudinal slit. As a result, the operability of the wing shape and the ease of wearing are not hindered, and there is no discomfort in 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 lateral direction Y of the multilayer portion 42 is preferably 90% or less, more preferably 85% or less, and further preferably 50. More than %, more preferably 60% or more.

In the case where the length L8 of the multilayer portion 42 is not fixed in the longitudinal direction X, the length L8 of the lateral direction Y of the multilayer portion 42 is the length of the portion having the smallest length in the product width direction.

Further, in the sanitary napkin 1 of the present embodiment, as shown in Fig. 1 and Fig. 3, the pair of vertical grooves 51, 51 are formed on the outer side of the longitudinal direction X of the plurality of layer portions 42 so as to face the plurality of layers. The portion 42 is convexly curved.

In order to improve the conformability of the sanitary napkin 1 or the absorbent body to the wearer, it is preferable to use the central portion of the lateral direction Y of the absorbent body 4 as the multi-layer portion 42 and to make the rigidity higher than the portion forming the longitudinal groove on both sides thereof. Although the rigidity is too large, if the distance between the multilayer portion 42 and the vertical groove 51 is too large, wrinkles are likely to occur at a portion between the multilayer portion 42 and the vertical groove 51 due to poor rigidity. On the other hand, as in the present embodiment, the vertical groove 51 is formed to be convexly curved toward the multilayer portion 42, and such wrinkles can be prevented from occurring.

The distance between the vertical groove 51 and the closest portion of the multi-layer portion 42 to the opposing portion B of the excretory portion is preferably 7 mm or less, and more preferably 5 mm or less.

Fig. 6 is a schematic enlarged plan view showing an absorbent body of a preferred configuration of the vertical groove 51, the front lateral groove 52, and the rear lateral groove 54. The longitudinal groove 51, the front lateral groove 52, and the rear lateral groove 54 respectively have a high compression portion 56 in the groove and a lower compression portion 57 than the compression portion, and the shape of each high compression portion 56 is in the longitudinal direction of each groove. Long shape. Also, the front lateral groove 52 and the rear lateral groove 54 The width W is wider than the longitudinal groove 51.

In the vertical groove 51, the shape of each of the high-compression portions 56 is a shape that is long in the longitudinal direction of the groove, for example, as shown in Fig. 6, whereby the longitudinal bending of the sanitary napkin 1 can be easily guided. Thereby, the adaptability can be further improved.

In the front lateral groove 52 and the rear lateral groove 54, the shape of each of the high compression portions 56 is a shape having a shape as shown in FIG. 6, which is long in the longitudinal direction of the groove, whereby the slit can be further reliably suppressed. The opening makes it possible to further surely suppress the trouble caused by the opening of the slit.

The shape of the high compression portion 56 that is longer in the longitudinal direction of the groove means that the length L9 along the direction of the groove is longer than the length L10 in the direction orthogonal to the groove. Moreover, 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 may have a longer shape as shown in FIG. The shape of the long shape is alternately arranged.

Further, 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, it is possible to suppress not only the opening of the slit of the drain portion but also the wrinkles of the excretion portion, thereby obtaining a wing that can be further improved. The operability of the shape and the advantageous effect of reducing the discomfort.

As shown in Fig. 1 (a) and Fig. 2, the absorbent body 4 of the sanitary napkin 1 of the present embodiment has a multi-layer portion 42 in the excretion portion opposing portion B, and the excretion portion slit region S and the central slit region S1 are formed in the inclusion portion. The area of the multilayer portion 42. Therefore, it is advantageous to achieve a more improved leakage prevention effect and a conformity of following physical activity.

Although not shown, the sanitary napkin 1 preferably further includes a second sheet between the absorbent body 4 and the topsheet 2. The second sheet is preferably a fibrous sheet in which the constituent fibers are liquid permeability of synthetic fibers. If the second sheet is composed of synthetic fibers, the diffusibility of the liquid can be suppressed to be low. Further, the synthetic fiber constituting the second sheet suppresses diffusibility to be low, and from the viewpoint of mechanical suitability, a fiber having weak hydrophilicity is preferable. The second sheet may comprise polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, etc. The fibers of the resin such as an ester or a polyamide such as nylon-6 or nylon-66 are formed singly or in combination of two or more kinds. In addition, the mixing here is a case where two or more types of resins having different melting points are used as the core-sheath type composite fiber or the side-by-side type composite fiber.

The second sheet is preferably a sheet having a high permeability and a moderate diffusibility, and therefore has a thickness of preferably 0.15 mm or more, and more preferably 0.2 mm or more. Further, it is preferably 0.4 mm or less, and more preferably 0.3 mm or less. From the viewpoint of wearing state, the thickness was measured under a load of 0.5 kPa.

As the second sheet, it is preferable to use a hot air non-woven fabric in which the intersecting synthetic fibers are mutually joined by heat fusion by hot air. Further, in addition to the hot air non-woven fabric, it may be a dot-bonded non-woven fabric, a spunbonded non-woven fabric, a water-jet non-woven fabric, or the like. In the case where the second sheet is a hot air non-woven fabric, the basis weight thereof is preferably 15 g/m ² or more and 40 g/m ² or less.

It is preferable that the front sheet 2 and the second sheet and the second sheet and the absorber 4 are partially fixed to each other. Further, in the case where the second sheet is not present, the front sheet 2 and the absorber 4 are preferably partially fixed.

Thereby, it is possible to achieve an appropriate opening of the slit portion and both the front sheet or the adhesion between the second sheet and the absorber. Moreover, the adhesion from the front sheet 2 to the absorber 4 is also improved in the portion other than the slit, and the mobility of the liquid from the top sheet 2 to the absorber 4 is improved. The adhesion between the front sheet 2 and the second sheet is improved, and the liquid becomes easy to move.

The term "partially fixed" means having a fixing portion including a dot or a line which is disposed on the entire sheet surface and does not need to be uniformly distributed, but does not completely fix the sheet to be fixed. The area of the fixing portion is preferably about 10% or more and 60% or less of the area of the entire surface of the fixing sheet. Specifically, the adhesive is applied intermittently, or the heat sealing is intermittently performed, and the front sheet 2 and the second sheet are partially fixed. In the case where the adhesive is applied intermittently, the adhesive is applied intermittently using a known mechanism such as a slit coating gun, or spirally coated using a spiral lance, or intermittently misted using a spray gun. Ground coating, Or applying a dot-like spray using a dot gun, and maintaining the permeability of the body fluid between the front sheet 2 and the second sheet, the front sheet 2 and the second sheet portion. Go on. As the coating adhesive, for example, a hot melt adhesive can be preferably used.

Examples of the hot-melt adhesive include styrene-based, olefin-based, and the like. As the styrene-based hot melt adhesive, styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), styrene as a hydride of SBS can be used. An ethylene-butene-styrene copolymer (SEBS) and a blended hot-melt adhesive obtained by blending two or more of these. Among them, from the viewpoint of easily obtaining a balance between adhesion and cohesive force, in particular, a blend of SIS and SBS is a hot-melt adhesive, or a blend of SIS and SEBS is preferably used. In the present invention. The coating amount of the hot melt adhesive is preferably 3 g/m ² or more and 10 g/m ² or less.

When the materials for forming the respective portions of the sanitary napkin 1 are described, the front sheet 2 and the back sheet 3 can be used without any particular limitation, and various materials previously used in the technical field can be used. As the topsheet 2, for example, a liquid-permeable sheet such as various nonwoven fabrics or perforated films subjected to hydrophilization treatment can be used. Further, as the back sheet 3, a material which is liquid impermeable or a material which is water-repellent can be used. As the material for liquid impermeability, a resin film, a resin film having fine pores and moisture permeability, or a laminate material such as a resin film and a non-woven fabric can be used, and as a water-repellent material, a spunbond-melt can be used. Composite non-woven fabric, spunbonded non-woven fabric, hot-adhesive non-woven fabric, hot air non-woven fabric, etc., which are multi-layered structures such as spray-spun bonding.

As the absorbent sheets 401 to 403 constituting the absorbent body 4, it is preferable to use an adhesive force generated by a water-absorptive polymer in a wet state or an adhesive such as an adhesive or an adhesive fiber added thereto to form a fiber. The sheet or the like is formed by bonding between the constituent fibers and the water-absorptive polymer. In addition, as the absorbent sheet, an absorbent sheet produced by the method described in JP-A-H08-246395 can be used, and the pulverized pulp and the water-absorbing polymer supplied with the airflow can be used. a dry film solidified by a subsequent agent (for example, a vinyl acetate-based adhesive, PVA (polyvinyl alcohol), etc.) An absorbent sheet obtained by dispersing a hot-melt polymer between paper or non-woven fabric, and a superabsorbent polymer obtained by dispersing a superabsorbent polymer in a spunbond or meltblown nonwoven fabric manufacturing step Absorbent sheets and the like. These absorbent sheets can be used as a sheet-like absorbent body by cutting one sheet into a specific shape. The thickness of each of the absorbent sheets is preferably 0.1 mm or more, particularly preferably 0.3 mm or more, more preferably 2 mm or less, and particularly preferably 1.5 mm or less. More specifically, it is preferably 0.1 mm or more and 2 mm or less, and particularly preferably 0.3 mm or more and 1.5 mm or less.

The laminate of the absorbent sheet of the present invention may be obtained by laminating a plurality of sheets of the absorbent sheet and laminating a plurality of sheets, or folding one sheet of the absorbent sheet and subsequently forming the layers. A layered body. Further, the laminate may be sandwiched between two sheets of absorbent sheets or folded to form a layer of a laminate of two or more layers, or may be laminated on the skin facing side or non-skin pair of other absorbent sheets. It is made to the side. Further, the folding method of the absorbent sheet may employ various folding methods. For example, the auxiliary absorbent body in the above embodiment may be folded and absorbed by a folding method as shown in Figs. 7(a) to 7(d). Sheet 403 is the original.

The thickness of the absorbent body 4 in the multilayer portion 42 is preferably 0.7 mm or more, more preferably 1 mm or more, further preferably 5 mm or less, further preferably 4 mm or less, and more specifically, preferably 0.7 mm or more. 5 mm or less, further preferably 1 mm or more and 4 mm or less. By setting the thickness of the multilayer portion 42 to such a range, it is possible to easily achieve both a good wearing feeling and a high absorption performance of the opposing portion B of the excretion portion in which the multilayer portion 42 is formed. Moreover, when the absorbent article of the sanitary napkin 1 of the present embodiment is provided with the wing-shaped portion, the wrinkles of the absorbent body of the opposing portion of the excretion portion can be easily suppressed. Further, the thickness of the portion of the absorber other than the multilayer portion 42 is preferably 0.3 mm or more, more preferably 0.5 mm or more, further preferably 3 mm or less, further preferably 2.5 mm or less, and more specifically, more specifically It is preferably 0.3 mm or more and 3 mm or less, and more preferably 0.5 mm or more and 2.5 mm or less. From the standpoint of high absorption performance and improvement of followability to the wearer's action, this range is preferred.

Further, in the absorber 4, the difference in thickness (step difference) between the intermediate portion 42 and the boundary portion with the peripheral portion thereof or the vicinity thereof is preferably 2 mm or less, and more preferably 1.5 mm or less. The purpose of this is to suppress the occurrence of wrinkles in the vicinity of the boundary between the intermediate portion 42 and the region of the peripheral portion where only the main absorber 40 is present in the opposing portion B of the excretory portion. If the step is large, there is a case where the sanitary napkin 1 is to follow the wearer's movement during wearing, and the gap due to the step is to be blocked, and as a result, wrinkles are likely to occur due to the influence of the step difference. However, by setting the step to the above range, the effect of suppressing the occurrence of wrinkles in the opposing portion B of the excretory portion is improved. The thickness of each part of the above-mentioned absorber 4 is measured by the following method.

<Method for Measuring Thickness of Absorber>

The absorbent body as the object to be measured was placed in a horizontal position without wrinkles or bending, 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 PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG. CO. LTD.) was used. At this time, a circular or square-shaped plate (acrylic plate having a thickness of about 5 mm) is placed between the end portion of the thickness gauge and the measurement portion in the measurement target, and the plate is adjusted so that the load becomes 5 cN/cm ² . size.

Further, in order to form the slit in the absorber 4, the laminate of the absorbent sheet may be partially cut by a known cutting mechanism. For example, a slit extending in the circumferential direction of the peripheral surface of the roll may be used. The cutting device that disperses the blade in the circumferential direction of the roller and the axial length direction to form a plurality of cutting rolls and an anvil roll that supports the cutting blade.

Further, examples of the water-absorbing polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, sodium polyacrylate crosslinked body, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride). Copolymers and their saponified compounds, polyaspartic acid, and the like. Further, the absorbent sheet constituting the absorbent body 4 preferably has a water-absorbent sheet containing a water-absorptive polymer, but may also contain a water-absorbent sheet containing a water-absorbent polymer and may not contain water absorption. The water-absorbent sheet of the polymer is combined to form a laminate of the water-absorbent sheet constituting the absorber.

As the side sheet 10, it can be used in the prior art without any particular limitation. As the various materials used, for example, a resin film which is impervious to liquid or water repellency, a laminate of a resin film and a non-woven fabric, or the like can be used. Examples of other materials include a spunbonded nonwoven fabric, a sheet obtained by combining a spunbonded nonwoven fabric (S) and a melt-blown nonwoven fabric (M) (for example, SM, SMS, SMMS, etc.), a hot-rolled nonwoven fabric, and a hot air non-woven fabric. Water-based (hydrophobic) non-woven fabric. In terms of the goodness of the skin feel and the side leakage prevention, it is particularly preferable to use a water-repellent hot air non-woven fabric.

Hereinabove, the present invention has been described based on preferred embodiments thereof, but the present invention is not limited to the above embodiments.

For example, the excretory portion slit region S may be formed only in the excretory portion opposing portion B, or may extend from the excretory portion opposing portion B to one of the rear portion C, or may extend from the excretory portion opposing portion B to the front portion A. One part and one part of the rear part C. Further, the number of layers of the absorbent sheet of the multilayer portion 42 may be two or three instead of four, or may be five or more. Further, the difference in the number of laminated sheets of the absorbent sheet of the multilayer portion 42 and the other portions thereof may be one sheet or three or more sheets. In the linear groove in which the front sheet 2 and the absorbent body 4 are integrally recessed toward the back sheet 3, the front lateral groove 53 and the longitudinal groove 51, and the rear lateral groove 55 and the longitudinal groove 51 may be empty. It is separated by the distance, or forms a breaking portion in the longitudinal groove 51, and does not become a complete ring shape.

Further, the sanitary napkin 1 includes five vertical slits 43a to 43e which are different from the vertical groove 51 as a vertical slit which overlaps the vertical groove 51. However, the absorbent article of the present invention may include only five longitudinal types. Any one of the slits 43a to 43e may be included in two, three or four types including any combination.

Figs. 8(a) and 8(b) are partially enlarged plan views showing an absorbent body of another example of the arrangement of the longitudinal slits of the absorbent body which can be used in the present invention.

The absorber 4A shown in Fig. 8(a) includes both side portions of the opposing portion S of the excretory portion, and more specifically, the outer side in the left and right directions of the central slit region S1, and includes a portion overlapping the longitudinal groove 51. The plurality of longitudinal slits 43a and 43a' and the longitudinal slit 43f located outside the longitudinal groove 51. The longitudinal slits 43a, 43a' are formed at a portion where the interval between the pair of longitudinal grooves 51 is the smallest The front and rear sides are substantially overlapped with the longitudinal grooves 51.

The absorber 4B shown in Fig. 8(b) is provided on both sides of the opposing portion S of the excretory portion, and more specifically, on the outer side in the left and right directions of the central slit region S1, and has a portion overlapping the longitudinal groove 51. The plurality of longitudinal slits 43e, 43a, 43e' and the longitudinal slit 43f located outside the longitudinal groove 57. The longitudinal length of the vertical slit 43a overlaps with the vertical groove 51. The vertical slits 43e and 43e' are formed before the portion where the interval between the pair of longitudinal grooves 51 is the smallest, and one of the portions overlaps the vertical groove 51.

Further, any one of the absorbers 4A and 4B shown in Figs. 8(a) and 8(b) has a longitudinal direction which intersects the front lateral groove 52 in the front side in the longitudinal direction X with respect to the center slit region S1. The slit 43h has a longitudinal slit 43i that intersects the rear lateral groove 54 at a rear side of the center slit region S1.

Further, as the absorbent body, any known absorbent body may be used instead of the absorbent sheet. For example, it is also possible to use a liquid-transmissive core material comprising a fiber deposit of fibers such as fluff pulp or an absorbent core of a fiber and a water-absorbent polymer mixed fiber stack. As the liquid-permeable core material, a water-permeable sheet such as paper such as toilet paper, various non-woven fabrics, or an apertured film can be used.

Further, the absorbent article of the present invention may be a sanitary pad (vaginal secretion pad), an incontinence pad or the like in addition to the menstrual period cotton.

In the above embodiment of the present invention, the following supplementary notes (absorbent articles and the like) are further disclosed.

<1> An absorbent article comprising an absorbent body comprising a liquid retaining absorbent body, a front sheet disposed on a skin facing surface side of the absorbent body, and a front sheet disposed on the absorbent body The back sheet of the non-skin facing surface side has an excretion portion facing portion disposed opposite to the excretion portion of the wearer at the time of wearing, and is disposed in front of the ventral side of the excretion portion facing the wearer And a rear portion disposed closer to the back side of the wearer than the opposing portion of the excretion portion, the absorbent article having a longitudinal direction corresponding to a front and rear direction of the wearer and a transverse direction orthogonal thereto, and including the excretion portion The longitudinal direction of the opposite part Each of the both side portions is extended to the outer side of the lateral direction, and the absorbent body has a drain portion slit region at the opposite portion of the drain portion, the drain portion slit region being along the longitudinal slit The central slit portion is formed in a state of being dispersed in the longitudinal direction and the lateral direction, and has a central slit region in the central portion of the lateral direction and the longitudinal direction in the drain portion slit region, wherein the central slit region is the longitudinal slit a plurality of dispersed states are disposed, and the absorbent body is formed on each of the left and right outer sides of the central slit region, and a longitudinal groove formed by joining the front sheet and the absorber is formed, and the absorber is Each of the left and right outer sides of the central slit region includes a longitudinal slit having a portion overlapping the longitudinal groove and a longitudinal slit located outside the longitudinal groove.

<2> The absorbent article according to the above <1>, wherein, before the central slit region in the absorbent body, the front sheet and the absorbent body are combined to form a front transverse groove along the longitudinal direction The direction in which the intersecting direction extends is formed, and the absorber has a longitudinal slit that intersects the front lateral groove in the longitudinal direction of the central slit region.

<3> The absorbent article according to the above <2>, wherein after the central slit region in the absorbent body, the front sheet and the absorbent body are joined to form a rear lateral groove along the longitudinal direction The intersecting direction is formed to extend, and the absorber includes the longitudinal slit that intersects the front lateral groove or the rear lateral groove.

<4> The absorbent article according to the above <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.

The absorbent article according to any one of the above aspects, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a plurality of layers in the opposing portion of the excretion portion, the multi-layer portion is absorbed The number of laminated sheets of the sheet is larger than the portion around the portion, the central slit region is formed in the multilayer portion, and the lateral lengths of the front lateral groove and the rear lateral groove are shorter than the multilayer portion The length of the above lateral direction.

The absorbent article according to any one of the items <1> to <5> wherein The groove, the front lateral groove and the rear lateral groove respectively have a high compression portion in the groove and a lower compression portion than the compression portion, and each of the high compression portions has a longitudinal length longer than a lateral length in the longitudinal groove. The shape is such that the length in the lateral direction of the front lateral groove and the rear lateral groove is longer than the length of the longitudinal direction.

The absorbent article according to any one of the above aspects, wherein the front lateral groove and the rear lateral groove have a width wider than the longitudinal groove.

The absorbent article according to any one of the above aspects, wherein the periphery of the excretion slit region of the absorbent body is surrounded by an annular non-slit region in which no slit is present.

The absorbent article according to any one of the above aspects, wherein the longitudinal groove is a curve that is recessed laterally from the opposing portion and the rear portion toward the inward portion of the drain portion. The shape is such that the pair of longitudinal grooves are narrowest at the vicinity of the longitudinal center of the opposing portion of the drain portion, and have the widest portion at the front portion and the rear portion.

The absorbent article according to any one of the above items, wherein the longitudinal groove comprises a plurality of curved shapes having curvature.

The absorbent article according to any one of the above aspects, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a plurality of layers in the opposing portion of the excretion portion, the multi-layer portion is absorbed The number of laminated sheets of the sheet is larger than the portion located around the portion, the central slit region is formed in the multilayer portion, and the pair of longitudinal grooves are formed outwardly on both sides of the side edges of the multilayer portion. The side of the multi-layered portion is convexly curved.

The absorbent article according to any one of the above aspects, wherein the longitudinal slit having a portion overlapping the longitudinal groove is mixed with the entire length of the slit and the longitudinal groove And a portion of the slit overlapping the longitudinal groove.

The absorbent article according to any one of the above aspects, wherein the absorbent body comprises: a main absorbent body which forms an outer shape of the absorbent body; and an auxiliary absorbent body which is combined with the main absorbent body Some overlap and are smaller than the main absorber.

<14> The absorbent article according to the above <13>, wherein the absorbent system has a structure in which one of the absorbent sheets constituting the auxiliary absorbent body is folded, and is disposed between two absorbent sheets constituting the main absorbent body. Founder.

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

<16> The absorbent article according to the above <14>, wherein the absorbent sheet is a structure in which the fibers are formed to be bonded to each other.

The absorbent article according to any one of the above-mentioned <14>, wherein the absorbent sheet is adhered by a water-absorbing polymer in a wet state, or an additional adhesive is added or A binder such as a fiber is used to form a sheet shape between the constituent fibers or between the constituent fibers and the water-absorptive polymer.

The absorbent article according to any one of the above aspects, wherein the absorbent sheet has a thickness of 0.1 mm or more and 2 mm or less per one sheet.

The absorbent article according to any one of the above aspects, wherein the pair of side sheets are on both sides of the longitudinal direction X on the opposite side of the skin of the absorbent body Between the two sides of the longitudinal direction X and the left and right sides of the absorbent body in a plan view, the absorbent body is disposed over substantially the entire length of the longitudinal direction X of the absorbent body, and the pair of the side sheets are respectively located opposite to the excretion portion. a first bonding wire having a linear shape and a second bonding wire located linearly before and after the longitudinal direction X of the first bonding wire are joined to the absorbent body, and are bonded to the first bonding wire and the second bonding wire Further, the line is formed on the inner side of the lateral direction, and a space portion defined by the side sheet and the front sheet is formed.

The absorbent article according to any one of the above aspects, wherein the longitudinal slit of the excretion portion slit region has a length of 10 mm or more and 35 mm or less.

The absorbent article according to any one of the above aspects, wherein the slit portion of the excretion portion includes slits of the longitudinal slits of two or more of which are disposed at intervals in the lateral direction. There are a plurality of longitudinal rows arranged between the longitudinal slits in the same slit row The gap is 3 mm or more and 20 mm or less.

The absorbent article according to any one of the above aspects, wherein the length of the lateral direction of the excretion portion slit region is 30 of the length of the absorbent body of the opposing portion of the excretion portion. More than % and less than 85%.

The absorbent article according to any one of the above aspects, wherein the length of the slit portion of the excretion portion is 30 mm or more and 55 mm or less.

The absorbent article according to any one of the above aspects, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a plurality of layers at the opposing portion of the excretion portion, and the longitudinal groove and the longitudinal groove are The separation distance between the multilayer portion and the closest portion of the opposing portion of the excretion portion is 7 mm or less.

The absorbent article according to any one of the above aspects, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a plurality of layers at the opposing portion of the excretion portion, and the multilayer of the absorbent body The thickness of the portion is 0.7 mm or more and 5 mm or less.

The absorbent article according to any one of the above aspects, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a multi-layered portion at the opposing portion of the excretion portion, and the multi-layer portion The thickness of the absorber portion is 0.3 mm or more and 3 mm or less.

The absorbent article according to any one of the above aspects, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a plurality of layers at the opposite portion of the excretion portion, and the thickness of the multilayer portion The difference in thickness near the boundary with the outer portion is 2 mm or less.

The absorbent article according to any one of the above-mentioned items, wherein the absorbent article is a menstrual sanitary napkin.

[Industrial availability]

According to the absorbent article of the present invention, workability or wearing feeling when the wing portion is fixed can be improved, and problems such as moist feeling or liquid leakage due to the opening of the slit can be prevented.

1‧‧‧Sanitary cotton

2‧‧‧Front sheet

4‧‧‧Acceptor

5‧‧‧Absorbing ontology

7‧‧‧wings

10‧‧‧Side sheet

11‧‧‧1st bonding wire

12‧‧‧2nd bonding wire

40‧‧‧Main absorber

41‧‧‧Assistant absorber

42‧‧‧Multi-layer

43‧‧‧ longitudinal slit

51‧‧‧ longitudinal slot

52‧‧‧ front transverse groove

53‧‧‧2nd front transverse groove

54‧‧‧ rear transverse slot

55‧‧‧2nd rear transverse groove

A‧‧‧ front section

B‧‧‧Excretion Department

C‧‧‧ Rear

L‧‧‧ vertical

L4‧‧‧ length

N‧‧‧Non-slit area

S‧‧‧Drain section slit area

S1‧‧‧central slit area

X‧‧‧ portrait

Y‧‧‧ horizontal

Claims (9)

An absorbent article comprising an absorbent body comprising a liquid retaining absorbent body, a front sheet disposed on a skin facing side of the absorbent body, and a non-skin pair disposed on the absorbent body The back surface sheet of the front side has a portion opposite to the excretion portion that is disposed opposite to the excretion portion of the wearer at the time of wearing, and is disposed at a front side of the abdomen of the wearer facing the excretion portion, and The absorbent article has a longitudinal direction corresponding to the front and rear directions of the wearer and a transverse direction orthogonal thereto, and is disposed at an opposite side of the rear side of the wearer, and includes an opposite portion from the drain portion Each of the two sides of the longitudinal direction is outwardly extended to the outer side of the lateral direction, and the absorbent body has a drain portion slit region at the opposite portion of the drain portion, and the drain portion is along the slit region The longitudinal slit is formed in a state of being dispersed in the longitudinal direction and the lateral direction, and has a central slit region in the central portion of the lateral direction and the longitudinal direction in the slit portion of the drain portion, wherein the central slit region is The slit is disposed in a plurality of dispersed states; the absorbent body is formed on each of the left and right outer sides of the central slit region to form a longitudinal groove formed by joining the front sheet and the absorber; and the absorber Each of the left and right outer sides of the central slit region includes a longitudinal slit having a portion overlapping the longitudinal groove and a longitudinal slit located outside the longitudinal groove. The absorbent article of claim 1, wherein the front side sheet and the absorbent body are joined to each other before the central slit region in the absorbent body, and the front lateral groove extends in a direction intersecting the longitudinal direction. Further, the absorber has a longitudinal slit that intersects the front lateral groove further forward than the central slit region in the longitudinal direction. The absorbent article of claim 2, wherein the front surface sheet and the absorbent body are joined to each other after the central slit region in the absorbent body, and the rear lateral groove extends in a direction intersecting the longitudinal direction. Further, the absorber includes the longitudinal slit that intersects the front lateral groove or the rear lateral groove. The absorbent article according to claim 3, wherein the absorbent body includes the vertical slit intersecting the front lateral groove and the vertical slit intersecting the rear lateral groove. The absorbent article according to claim 3 or 4, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a multi-layered portion at the opposite portion of the excretion portion, and the number of laminated sheets of the multi-layered absorbent sheet is located at The central slit region is formed in the multi-layer portion, and the lateral length of the front lateral groove and the rear lateral groove is shorter than the lateral length of the multilayer portion. The absorbent article of claim 3 or 4, wherein the longitudinal groove, the front lateral groove and the rear lateral groove respectively have a high compression portion in the groove and a lower compression portion than the compression portion, and each of the high compression portions The shape in which the length in the longitudinal direction of the longitudinal groove is longer than the length in the lateral direction is a shape in which the length in the lateral direction of the front lateral groove and the rear lateral groove is longer than the longitudinal direction. The absorbent article of claim 3 or 4, wherein the front lateral groove and the rear lateral groove have a width wider than the longitudinal groove. The absorbent article of claim 3 or 4, wherein the periphery of the excretion slit region of the absorbent body is surrounded by an annular non-slit region in which no slit is present. The absorbent article according to claim 3 or 4, wherein the absorbent body comprises a laminate of an absorbent sheet, and has a multi-layered portion at the opposite portion of the excretion portion, and the number of laminated sheets of the multi-layered absorbent sheet is located at The central slit region is formed in the plurality of portions, and the pair of longitudinal grooves are formed on the outer side of the plurality of the plurality of portions, and are formed to be convexly curved toward the side of the plurality of portions. .