KR20080042702A - Absorbent article - Google Patents

Abstract

An absorbent sanitary napkin is provided to improve fitting effect under the user's crotch by gradually making the size of a protrusion get smaller from the center to the rear side. An absorbent sanitary napkin(1) comprises an absorbing layer(10) and a leak preventing layer. A pair of grooves(51) are formed at both longitudinal sides of the skin contact surface in the absorbing layer. A pair of grooves are formed in the axisymmetric shape for a center line extended in a longitudinal direction of the absorbing layer and convexly curved toward the outside of a width direction in each longitudinal center region. A pair of inner rear grooves(52) are formed at the longitudinal rear part of the absorbing layer. A gap of the width direction of the inner rear grooves gets narrower toward the rear side. A pair of outer rear grooves(53) are positioned at the outer side in a width direction of the inner rear groove and extended longer than the inner rear groove toward the rear side in a longitudinal direction.

Description

Absorbent article {ABSORBENT ARTICLE}

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

BACKGROUND ART [0002] An absorbent article has been conventionally known in which a leakage preventing groove is formed on the skin-contacting surface side of an absorbent layer composed of a liquid-permeable surface sheet and a liquid retaining absorber. For example, Japanese Patent Application Laid-Open No. Hei 10-155832 discloses a plurality of leakage prevention along the width direction of an absorbent article on the skin contacting surface of the rear portion of the absorbent layer (the portion that abuts on the back side of the wearer when the absorbent article is worn). An absorbent article having a groove is disclosed.

Moreover, the absorbent article which has a middle part in an absorbent body, and the adhesiveness of the skin contact surface of the absorbent article at the time of wearing, and the excretion part of a wearer is high. An absorbent article of this kind is intended to prevent a gap between the skin contact surface and the wearer's skin and to prevent body fluids from leaking onto the skin contact surface of the absorbent article or the wearer's skin. As an absorbent article having such a purpose, Japanese Patent Laid-Open No. 2001-8971 has four leakage preventing grooves at the rear portion of the absorbent layer, and two inner leakage preventing grooves and two outer leakage preventing grooves are provided. The leakage preventing grooves are connected to each other through a semicircular connecting leakage preventing groove at a rear end thereof, and an absorbent article is disclosed in which a middle portion is formed at a portion surrounded by the internal leakage preventing groove and the semicircular connection leakage preventing groove.

The plurality of grooves formed in the absorbent article of Japanese Patent Application Laid-Open No. Hei 10-155832 are mainly for effectively preventing the side glands and the back glands, and the fit characteristics at the time of wearing cannot be improved. Moreover, since the absorbent body does not rise at the time of wearing, the adhesiveness of the skin contact surface of an absorbent article and the excretion part of a wearer is inferior. The absorbent article of Japanese Patent Laid-Open No. 2001-8971 uses an absorbent body having a middle portion as a constituent member, and the middle and high portions improve the adhesion between the skin contact surface of the absorbent article and the wearer's excretion portion. However, in the absorbent article having such a used part, a height difference occurs at the used part and the specific gravity part. Since there are individual differences in the shape of the lower crotch including the excretory part and the buttocks, the shape formed by the middle and high specific gravity parts does not correspond to the shape of the lower crotch depending on a person. There was the problem that it was hard to do it. In addition, when the middle portion is formed in the absorbent body, the number of members in the absorbent body is increased or the number of manufacturing steps is increased, which increases the manufacturing labor and cost of the absorbent article.

The present invention provides an absorbent article having an absorbent layer and a leakage preventing layer, wherein a pair of grooves are formed at both sides of the skin contact surface side in the absorbent layer in the longitudinal direction. The pair of grooves are substantially linearly symmetrical with respect to the center line extending in the longitudinal direction of the absorbent layer, and are formed so as to be convexly curved outward in the width direction at the central region in the longitudinal direction. The absorbent article further includes a pair of inner rear grooves in which the interval in the width direction gradually narrows toward the rear of the absorbent layer, and is located in the widthwise outer side of the inner rear groove, and is longer in the longitudinal direction than the inner rear grooves. It has a pair of outer rear grooves extending rearward.

The present invention relates to an absorbent article which is easy to manufacture, while having an excellent fitting property by being raised toward the skin side when worn.

EMBODIMENT OF THE INVENTION Hereinafter, one preferred embodiment of the absorbent article of this invention is described, referring drawings. This embodiment applies the absorbent article of this invention to a sanitary napkin.

The sanitary napkin 1 of this embodiment is equipped with the absorption layer 10 and the leakage prevention layer 11, as shown in FIGS. A pair of grooves (hereinafter referred to as a 'center groove') 51 and 51 are formed at both sides of the skin contact surface side of the absorbent layer 10 in the longitudinal direction, and the pair of grooves 51 and 51 are the absorbent layer. It has a substantially linear symmetry with respect to the center line S1 extended in the longitudinal direction of (10). Each of the pair of grooves 51 and 51 is formed to be convexly curved outward in the width direction in the longitudinal center region. In addition, in the longitudinal rear portion C of the absorbent layer 10, a pair of inner rear grooves 52 and 52 in which the interval in the width direction gradually narrows toward the rear, and the outer side in the width direction of the inner rear groove 52 are provided. It has a pair of outer rear grooves 53 and 53 which are positioned and extend laterally in the longitudinal direction than the inner rear groove 52.

The sanitary napkin 1 of this embodiment is further demonstrated, The said absorption layer 10 consists mainly of the surface sheet 2 and the absorber 4, The said leakage prevention layer 11 is a back sheet ( It is composed mainly of 3).

Each of the pair of center grooves 51 and 51, the pair of inner rear grooves 52 and 52, the pair of outer rear grooves 53 and 53, and the pair of front grooves 54 and 54 to be described later, respectively, As shown to 2 (a), it becomes substantially linear symmetry with respect to the center line S1 extended in the longitudinal direction of the absorbing layer 10. As shown to FIG. In addition, the pair of center grooves 51 and 51, the pair of outer rear grooves 53 and 53, and the pair of front grooves 54 and 54 are convexly curved outward in the width direction.

In this embodiment, as shown to Fig.2 (a), a pair of front groove | channel 54, 54 is formed in the front part A, and a pair of said center groove | channel 51, 51 is a pair of said front It is connected via the grooves 54 and 54, and the longitudinal rear ends of the pair of central grooves 51 and 51 and the longitudinal front ends of the pair of outer rear grooves 53 and 53 are connected. In addition, the pair of outer rear grooves 53 and 53 are connected at the longitudinal rear ends. Therefore, in this embodiment, the area | region enclosed by the pair of front groove | channel 54, 54, the pair of center groove | channels 51 and 51, and the pair of outer rear groove | channels 53 and 53 is formed. In addition, the pair of inner rear grooves 52 and 52 is not connected to the pair of central grooves 51 and 51 and the pair of outer rear grooves 53 and 53.

In the present embodiment, side grooves 6 that are convexly curved in the width direction inner side are formed on the outer side in the width direction of each of the pair of central grooves 51, 51. The pair of side grooves 6 and 6 extend along the longitudinal direction of the sanitary napkin 1 as a whole. The length along the longitudinal direction of the lateral groove 6 is preferably approximately equal to or longer than the distance between the front end of the front groove 54 and the rear end of the outer rear groove 53.

The length L1 along the longitudinal direction at the center portion B of the pair of central grooves 51 and 51 is a difference between the position of attaching the sanitary napkin to the underwear and the difference in the excretion position according to the individual body shape. It is 30-90 mm, More preferably, it is 40-60 mm from a viewpoint of accepting and absorbing the liquid discharged. The widthwise maximum spacing W1 at the central portion B of the pair of central grooves 51 and 51 is raised to fit between the crotch portion of the wearer when the sanitary napkin 1 is worn, and the pair of central grooves ( From the viewpoint of stabilizing the shape of the area surrounded by 51 and 51, the thickness is preferably 20 to 60 mm, more preferably 30 to 40 mm. Similarly, from the viewpoint of stabilizing the raised shape of the area surrounded by the pair of central grooves 51 and 51, the maximum gap W1 and the minimum gap in the central groove 51 (the central groove 51 and the front groove 54). Or the gap at the connection position with the outer rear groove 53) is preferably 5 to 10 mm.

 The gap in the width direction of the pair of said inner rear grooves 52 and 52 is largest in the longitudinal front end part and smallest in the rear end part, as shown to Fig.2 (a). In the sanitary napkin 1 of this embodiment, a pair of inner rear groove | channels 52 and 52 are connected in the rear end part.

Thus, since the width | variety of the width direction space | interval of a pair of inner rear groove | channels 52 and 52 consists of a wide front side, and a rear side is narrow, the influence of uplift in the area | region enclosed by a pair of center groove | channels 51 and 51 is a pair of inner side It is transmitted to the area | region T1 of the width direction inner side of the rear groove | channel 52, 52, and a raise arises also in the area | region T1 of the width direction inner side of a pair of inner rear groove | channel 52 and 52. In addition, the size of the ridge is influenced by the widthwise gap between the pair of inner rear grooves 52 and 52, and the size of the ridge becomes smaller as the rear portion has a smaller gap. Therefore, the size of the ridge gradually decreases from the center portion B toward the rear portion C, and the fit of the lower part of the crotch of the wearer is improved, and a feeling of discomfort is less likely to occur.

The widthwise maximum spacing W2 of the pair of inner rear grooves 52, 52 is the width of the pair of inner rear grooves 52, 52 in conjunction with the elevation of the area surrounded by the pair of central grooves 51, 51. It is 10-50 mm, More preferably, it is 25-35 mm from a viewpoint which the area | region inside of a direction raises gently and fits under a crotch of a wearer. The length L2 along the longitudinal direction of the pair of inner rear grooves 52, 52 is preferably 30 to 90 mm, more preferably 50 to 70 mm.

The length L3 along the longitudinal direction of the pair of outer rear grooves 53 and 53 controls the liquid diffusion in the longitudinal direction and is the surface of the area surrounded by the pair of central grooves 51 and 51 in the sanitary napkin. From a viewpoint of stabilizing a shape, Preferably it is 55-135 mm, More preferably, it is 75-115 mm. The widthwise maximum spacing W3 of the pair of outer rear grooves 53 and 53 is preferably 20 to 60 mm, more preferably 35 to 45 mm from the viewpoint of effectively using the absorber 4 and preventing leakage. to be. The preferable range of this space | interval W3 also applies to the width direction maximum space | interval of a pair of front groove | channel 54 and 54. As shown in FIG.

The influence of the elevation between the regions surrounded by the pair of central grooves 51 and 51 is a pair of outer rear grooves having the same or wider width intervals toward the rear from the connection position with the pair of central grooves 51 and 51. Since it becomes difficult to transmit to 53 and 53, the surface shape is easy to stabilize.

Moreover, the area | region T2 which is the width direction inner side of the outer rear groove 53 by the elevation of the area | region T1 of the width direction inner side of the pair of inner rear grooves 52, 52 and the width direction outer side of the inner rear groove 52. From the viewpoint of mitigating the influence on the surface and stabilizing the surface shape of the region T2, the inner rear groove 52 is preferably not connected to the central groove 51 and the outer rear groove 53. The distance L4 between the front end portion 52C of the inner rear groove 52 and the central groove 51 or the outer rear groove 53 is preferably 1 to 7 mm, more preferably 2 to 4 mm.

In addition, since the length of the pair of front grooves 54 and 54 is shorter than that of the pair of inner rear grooves 52 and 52, the effect of the elevation of the area surrounded by the pair of central grooves 51 and 51 The silver stops in the pair of front grooves 54 and 54, and the absorber 4 does not rise in front of the pair of front grooves 54 and 54. Therefore, the fit to the wearer's body of the sanitary napkin 1 from the front of the pair of front grooves 54 and 54 becomes better.

As the material for forming the front sheet 2 and the back sheet 3, various sheet materials used in conventional absorbent articles and the like can be used without particular limitation.

As the pulp material of the absorbent body 4, various pulp materials used in conventional absorbent articles and the like can be used, and long fibers such as softwood pulp, chemically treated synthetic pulp and cellulose tows are particularly preferable. In addition to the pulp material, a polymer absorbing polymer, a polyester or polypropylene synthetic fiber, a heat sealable fiber, and rayon may be used as the material for forming the absorber 4. It is also preferable to mix and use a pulp material and the said material as a formation material of the absorber 4.

The weight of the absorber 4 is preferably 150 to 600 g / m 2, more preferably 200 to 500 g / m 2 from the viewpoint of securing the flexibility of the absorber 4. By setting the weighing of the absorber 4 in this range, the absorbent layer 10 is more likely to be raised when the sanitary napkin 1 is worn. Moreover, in the area | region T2 which is the width direction inner side of the outer front groove 53, and the width direction outer side of the inner rear groove 52, and the area | region T1 of the width direction inner side of the said inner rear groove 52, The weighing is preferably approximately equivalent. In addition, "approximately equivalent" here means that the weighing difference of both is in the range below 50 g / m <2>, More preferably, within 30 g / m <2>.

3 and 4, the thickness of the absorbent layer 10 from the widthwise center portion to the widthwise side portion of the absorbent layer 10 caused by the weighing difference of the absorber 4 or other factors is explained. It is preferable that the thickness is smoothly changed from the viewpoint of making it easy to fit the wearer's body shape without forming a step in the thickness of the absorbent layer 10, and the widthwise center upper surface of the sanitary napkin 1 When the bottom face of the groove of the center groove 51 or the outer rear groove 53 is a straight line, the angle formed by the straight line and the horizontal line (not shown) is preferably 0 to 30 °, more preferably 5 to 20 °. desirable. Moreover, the thickness of the absorber layer 10 in the area | region T2 which is the width direction inner side of the outer rear groove 53 and the width direction outer side of the inner rear groove 52 is the thickness which has an upper surface near the said straight line, It is preferable that the thickness is approximately equal to the thickness of the absorbent layer 10 in the region T1 in the width direction of the inner rear groove 52.

In the absorbent layer 10, as shown in FIG. 3, the surface sheet 2 and the absorbent body 4 have the center groove 51, the inner rear groove 52, and the outer rear groove 53. ) And the front groove 54. The center groove 51, the inner rear groove 52, the outer rear groove 53 and the front groove 54 extend in the thickness direction to the vicinity of the non-skin-contacting surface side of the absorber 4. Therefore, even if a large amount of liquid is excreted, the liquid is once stopped in the central groove 51, the inner rear groove 52, the outer rear groove 53 and the front groove 54, and passes through these grooves to absorb the absorbent body 4. Can be moved to).

As shown in FIG. 3, the skin contact surface side and the non-skin contact surface side of the absorber 4 both sides are covered with a pair of water repellent inner sheets 7 and 7 folded and overlapped at both edges of the absorber 4.

The inner sheet 7 may be a sheet material having various water repellency used in conventional absorbent articles and the like, and in particular, it is preferable to use polyethylene sheet, polyethylene laminate paper, and SMS nonwoven fabric.

On the skin-contacting surface side of both side portions of the absorber 4, the surface sheet 2 and the absorber 4 are joined by the lateral grooves 6 through the inner sheet 7 as shown in FIG. have. On the non-skin-contacting side of the absorber 4 on both sides, the non-skin-contacting side of the absorber 4 and the inner sheet 7 are solely used for welding means or adhesive for reconstituting components such as heat seals, ultrasonic seals, or the like. It is joined together.

A pair of said center grooves 51 and 51, a pair of said inner rear grooves 52 and 52, a pair of said outer rear grooves 53 and 53, a pair of said front grooves 54 and 54 and a pair of said side surfaces The grooves 6 and 6 are formed by performing sealing processing such as press working, heat sealing processing, ultrasonic sealing processing, and the like on the skin contacting surface side of the absorbent layer 10. In this embodiment, each said groove is formed with the embossed groove by press work and heat seal processing.

Since the said back sheet 3 is arrange | positioned at the non-skin contact surface side of the said absorber 4, and the said water-repellent inner sheet 7 is arrange | positioned at the non-skin contact surface side of the absorber 4 both sides, the absorber 4 Leak-tightness of the liquid absorbed in) is improved.

As shown in FIG. 3, the said front sheet 2 and the said back sheet 3 are slightly extended from the circumferential edge of the said absorber 4, and are joined by well-known joining methods, such as a heat seal. It is.

In addition, in the said center part B, as shown in FIG. 4, the said back sheet 3 and the said surface sheet 2 are directed in the width direction outer side from each of the both edges of the said absorber 4, and are joined, The part 8 is formed.

On the non-skin-contacting side (outer surface) of the back sheet 3, a misalignment preventing agent (not shown) for fixing the sanitary napkin 1 to the wearer's underwear or the like is formed. The shift preventing agent is covered with release paper (not shown), and is protected when not in use.

The sanitary napkin 1 of this embodiment is a line folding the vicinity of the boundary line of the front part A and the center part B, and the boundary line vicinity of the center part B and the rear part C before use, and FIG. It is folded three times as shown in FIG. 2, the vicinity of the boundary line between the front part A and the center part B is a connection position of the front groove 54 and the center groove 51, and the groove | channel (in the vicinity of the said connection position ( The shape of the front groove 54 and the center groove 51 is a shape cut off inward in the width direction. Similarly, the vicinity of the boundary between the central portion B and the rear portion C is a connection position between the central groove 51 and the outer rear groove 53, and the grooves (center groove 51 and The shape of the outer rear groove 53 is a shape that is constricted to the inner side in the width direction. When the sanitary napkin 1 is used, the tape 9 is peeled off, or in the absence of the tape 9, each of the folded front part A and the rear part C are stretched outward in the longitudinal direction. As such, the sanitary napkin 1 is a line folding a connection position between the front groove 54 and the central groove 51 having a constricted shape, and the connection position of the central groove 51 and the outer rear groove 53. Since it is folded, the wrinkles are reduced by inducing bending, and when worn, the wrinkles are lost or alleviated by the bumps, so the feeling is good, and the liquid disposed on the surface of the sanitary napkin 1 leaks in the width direction through the wrinkles. Can be prevented.

The sanitary napkin 1 of this embodiment is fixed and worn inside the crotch lower part, such as underwear. The surface sheet 2 in the center portion B of the sanitary napkin 1 abuts the wearer's excretion portion. At this time, the sanitary napkin 1 receives a compressive force from the left and the right inward in the width direction by the inner side of the upper part of both thighs of the wearer. In addition, the term "convexly curved" as used in the present invention is not limited to the case of curved convexly, but also includes the case of convexly curved in a straight (polygonal) shape.

According to the sanitary napkin 1 of this embodiment, the pair of center grooves 51 and 51 are convexly curved in the width direction outer side. Therefore, when the compression force is received from the left and right in the width direction, the portion located in the outermost direction in the width direction of the central groove 51 quickly receives the compression force toward the width direction inside, and as shown in FIG. , 51 causes a bulge in the central portion of the absorbent body 4, which is enclosed. In addition, the area T1 on the inner side in the width direction of the inner rear groove 52 also protrudes toward the skin side of the wearer in conjunction with it. As a result, the absorbent layer 10 comes into close contact with the excreted portion of the wearer. In particular, since the width of the inner rear groove 52 is gradually narrowed toward the rear, the inner rear groove 52 is thinly raised in the region T1 on the inner side of the inner rear groove 52, and the fitability in the hip gap behind the excretory portion increases. . On the other hand, in the area T2 which is the inner side in the width direction of the outer rear groove 53 and the outer side in the width direction of the inner rear groove, the absorber 4 is flat and is easy to fit into the hip shape of the wearer because the absorber 4 is flat. In addition, the effect of preventing leakage of fluid from the skin surface is increased.

Moreover, in the sanitary napkin 1 of this embodiment, the measurement and the inner rear groove 52 in the area | region T2 which are the width direction inner side of the outer rear groove 53 and the width direction outer side of the inner rear groove 52 are carried out. Weighing in the region T1 on the inner side in the width direction is approximately equal. Therefore, the middle part is not formed in the area T1 of the inner side in the width direction of the inner rear groove 52. In the sanitary napkin 1 of this embodiment, as mentioned above, the area | region enclosed by the pair of center groove | channel 51 and 51 and the area | region T of the width direction inner side of the pair of inner rear groove | channel 52 and 52 are mentioned. Along with this elevation, the absorbent body 4 becomes flat in the width direction inner side of the outer rear groove 53 and in the width direction outer side of the inner rear groove 52, without being raised, so that the absorber 4 It is possible to fit the wearer's crotch bottom shape without forming a middle portion.

Therefore, a gap between the wearer's skin and the absorbent layer due to the step between the middle and the high specific gravity parts, which tended to occur in the conventional sanitary napkin, is less likely to occur.

In addition, since the sanitary napkin 1 of this embodiment does not need to form a middle part, the number of structural members is small and manufacture is easy.

In the sanitary napkin 1 of the present embodiment, the pair of central grooves 51, 51 are connected via the pair of front grooves 54, 54 at the front portion A, and the pair of central grooves. (51, 51) and a pair of outer rear grooves 53, 53 are connected, a pair of outer rear grooves 53, 53 are connected at the rear portion (C), by these grooves absorbent layer 10 The closed area is formed. Therefore, when the sanitary napkin 1 receives a compressive force from the width direction at the time of wearing, it can effectively prevent it from being folded twice along the length direction in the center part of the width direction.

In the sanitary napkin 1 of this embodiment, the pair of inner rear grooves 52, 52 are connected to the pair of central grooves 51, 51 and the pair of outer rear grooves 53, 53, respectively. Not. Therefore, the area in the widthwise inner side of the pair of inner rear grooves 52 and 52 is further raised in conjunction with the elevation of the area surrounded by the pair of central grooves 51 and 51 when the sanitary napkin 1 is worn. In addition, in the area T2 which is the widthwise inner side of the outer rear groove 53 and the widthwise outer side of the inner rear groove 52, the absorber 4 tends to be flat without being raised.

Moreover, in the sanitary napkin 1 of this embodiment, since the pair of side grooves 6 and 6 are each formed in the width direction outer side rather than the pair of center grooves 51 and 51, the sanitary napkin 1 is Even in the case of receiving a compressive force locally from the width direction, the compressive force is dispersed throughout the longitudinal direction of the lateral groove 6 and propagated to the pair of central grooves 51 and 51 that are convexly curved outward in the width direction, thereby absorbing the layer. 10 is raised stably. Therefore, even if the compressive force to the inside of the width direction is not equal to right and left, the absorbent layer 10 satisfactorily rises toward the skin side of the wearer.

The absorbent article of the present invention is not limited to the above-described embodiment, and may be appropriately modified as long as the absorbent article does not deviate from the gist of the present invention.

In the present embodiment, the pair of central grooves 51 and 51 are connected through the pair of front grooves 54 and 54 at the front portion A, but they are not connected regardless of the presence or absence of the front groove 54. do. In addition, although the pair of outer rear grooves 53 and 53 are connected in the rear end part in this embodiment, they do not need to be connected. The pair of front grooves 54 and 54 and the pair of outer rear grooves 53 and 53 are connected at the front end of the pair of front grooves 54 and 54 or at the rear end of the pair of outer rear grooves 53 and 53. If there is, it has the effect of confining the influence of the ridge in the groove, and if it is not connected, it has the effect of promoting the ridge of the area surrounded by the groove.

The pair of inner rear grooves 52, 52 is connected at the rear end in the present embodiment, but may not be connected. In this case, it is preferable that the space | interval of the rear ends is 5-10 mm.

In addition, in this embodiment, although the water-repellent inner sheet 7 is used, the side leakage prevention part can also be provided in the longitudinal direction both sides of the absorber layer 10, and can improve a leakage prevention effect.

The absorbent article of the present invention is not limited to a sanitary napkin, but can be applied to incontinence pads or the like.

According to the absorbent article of the present invention, the absorbent body is raised toward the skin side at the time of wearing, and it is easy to manufacture while having excellent fitting property.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the sanitary napkin which is one Embodiment of the absorbent article of this invention.

FIG.2 (a) is a top view which shows the whole sanitary napkin shown in FIG.

FIG.2 (b) is a top view which shows only the groove | channel of the sanitary napkin shown in FIG.

3 is a cross-sectional view taken along the line X-X shown in FIG.

4 is a cross-sectional view taken along the line Y-Y shown in FIG.

It is a perspective view which shows the shape at the time of wearing a sanitary napkin shown in FIG.

It is a perspective view which shows the sanitary napkin shown in FIG. 1 three times folded.

Claims (5)

An absorbent article having an absorbent layer and a leakage preventing layer, A pair of grooves are formed at both sides of the skin contact surface side in the absorbent layer in the longitudinal direction, and the pair of grooves have a substantially line-symmetrical shape with respect to the center line extending in the longitudinal direction of the absorbent layer, each having a width in the central region in the longitudinal direction. It is formed so as to be convexly curved in the outer direction, and in the longitudinal rear portion of the absorbing layer is located on the outer side in the width direction of the pair of inner rear grooves, wherein the interval in the width direction is gradually narrowed toward the rear, and the inner rear grooves An absorbent article comprising a pair of outer rear grooves extending longitudinally rearward than the inner rear grooves. 2. The weighing apparatus of claim 1, wherein the absorbent body forming the absorbent layer has a weighing ratio of 150 to 600 g / m2, and is measured in a widthwise inner side of the outer rear groove and a widthwise outer side of the inner rear groove and the inner rear groove. An absorbent article, characterized in that the weighing in the widthwise inner region of the substrate is approximately equal. The method of claim 1, wherein the pair of grooves are connected at the front of the absorbent layer, the pair of grooves and the pair of outer rear grooves are connected, and the pair of outer rear grooves are the absorbent layer. An absorbent article, characterized in that connected at the rear of the. 4. The absorbent article as in claim 3, wherein the pair of inner rear grooves are not connected to the pair of grooves and the pair of outer rear grooves. The absorbent article according to any one of claims 1 to 4, wherein side grooves that are convexly curved in the width direction are formed on the outer side in the width direction of each of the pair of grooves.

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