WO2010071000A1

WO2010071000A1 - Absorbent article

Info

Publication number: WO2010071000A1
Application number: PCT/JP2009/069375
Authority: WO
Inventors: 晴美三浦; 聰田中; 進介長原; 宙夫安田; 由佳林; 仁月田; 一光古田
Original assignee: 花王株式会社
Priority date: 2008-12-15
Filing date: 2009-11-13
Publication date: 2010-06-24
Also published as: TW201026291A; CN102227199B; JP2010136972A; JP5292083B2; TWI522091B; CN102227199A

Abstract

A napkin (1) is an oblong article equipped with a top sheet (2), a back sheet (3), and an absorbent body (4) which is placed between the sheets (2, 3). In the sanitary napkin (1), a pair of inner grooves (71), which curve outward into a convex shape in the width direction (X direction) when viewed in a plan view, are formed in both side parts (2b, 4b) of the top sheet (2) and the absorbent body (4) within a discharge area (A), and a pair of outer grooves (72), which curve outward into a convex shape in the width direction (X direction) when viewed in a plan view, are formed in the top sheet (2) and the absorbent body (4) outside of each of the inner grooves (71) in the width direction (X direction). The outer grooves (72) of the sanitary napkin (1) are longer than the inner grooves (71), and the convex peak parts (71a) of the inner grooves (71) are placed within the length of the outer grooves (72).

Description

Absorbent articles

The present invention relates to an absorbent article such as a sanitary napkin, an incontinence pad, and a panty liner (orimono sheet).

Conventionally, an absorbent article is known in which, when the absorbent article is worn, the absorbent body protrudes toward the wearer's skin and the adhesion with the excretory part is improved. This type of absorbent article prevents gaps between the skin contact surface and the wearer's skin, and body fluid leaks along the skin contact surface of the absorbent article or the wearer's skin. It aims at reducing.

For example, in Patent Document 1 and Patent Document 2, an inner compressed groove and an outer compressed groove extending in the longitudinal direction are provided on both the left and right sides of the central absorbent portion with a space therebetween. Absorbent article in which the central absorbent portion rises to the skin side by displacing the inner compressed groove toward the skin side rather than the outer compressed groove when the compressive force toward the center line extending in the longitudinal direction acts Is disclosed.

However, the inner compression groove and the outer compression groove described in Patent Document 1 and Patent Document 2 are both portions that become a flexible shaft when a compressive force is applied toward the center line extending in the longitudinal direction. For this reason, not only the central absorption part rises, but also rises from the region sandwiched between the outer compressed grooves on the left and right sides. Thus, when parts other than a center absorption part protrude and the area | region which leaves | separates from the crotch part of underwear spreads, a twist will generate | occur | produce easily in an absorbent article and there exists a possibility of impairing the fitting property of a center absorption part.

JP 2004-154153 A JP 2004-154154 A

The present invention relates to an absorbent article in which the absorbent body is raised to the skin side of the wearer, the adhesion with the excretory part is improved, the twist is hardly generated, and the fit of the absorbent body is improved.

The present invention provides a substantially vertically long absorbent article comprising a liquid-permeable surface sheet on the skin contact surface side, a back sheet on the non-skin contact surface side, and an absorber disposed between the sheets. It is. According to the present invention, a pair of inner grooves curved in a convex shape outward in the width direction in plan view are formed on both sides of the topsheet and the absorber in the excretion part region in contact with the body fluid excretion part of the wearer. Is formed. In the present invention, a pair of outer grooves that are curved outwardly in the width direction in a plan view are formed in the top sheet and the absorber on the outer sides in the width direction of the pair of inner grooves. The length of the outer groove of the present invention is longer than the length of the inner groove, and the convex top of the inner groove is arranged within the range of the length of the outer groove.

FIG. 1 is a plan view showing a sanitary napkin according to this embodiment of the present invention. 2 is a cross-sectional view taken along line X1-X1 of FIG. FIG. 3 is a cross-sectional view taken along line X1-X1 when the sanitary napkin of the present embodiment is used. 4 (a) to 4 (c) are plan views of main parts showing the relationship between the inner groove and the outer groove in a sanitary napkin according to another embodiment of the present invention.

Detailed Description of the Invention

Hereinafter, a preferred embodiment of a sanitary napkin that is an absorbent article of the present invention will be described with reference to FIGS.

The sanitary napkin 1 of this embodiment is formed symmetrically with respect to a center line CL extending in the longitudinal direction of the sanitary napkin 1 as shown in FIG. Therefore, in the following description, the left and right symmetrical parts will be mainly described. As shown in FIG. 1, the sanitary napkin 1 of the present embodiment includes a liquid-permeable surface sheet 2 on the skin contact surface side, a back sheet 3 on the non-skin contact surface side, and a space between these

sheets

2 and 3. It is a substantially vertically long thing provided with absorber 4 arranged in. As shown in FIG. 1, the sanitary napkin 1 according to the present embodiment includes a top sheet 2 and both

side portions

2 b, 2 b, 4 b, 4 b of the absorbent body 4 in the excretory part region A that is in contact with the body fluid excretion part of the wearer. In addition, a pair of

inner grooves

71, 71 that are curved outward are formed in the width direction (hereinafter referred to as "X direction"; X direction: direction perpendicular to the center line CL) in plan view. A pair of outer grooves 72 curved convexly outward in the width direction (X direction) in plan view on the top sheet 2 and the absorbent body 4 on the outer side in the width direction (X direction) of each of the pair of

inner grooves

71, 71. , 72 are formed. As shown in FIG. 1, the sanitary napkin 1 of the present embodiment has the outer groove 72 longer than the inner groove 71, and the convex top 71 a of the inner groove 71 is longer than the outer groove 72. It is arranged within the range.

The sanitary napkin 1 of the present embodiment will be described in detail. The sanitary napkin 1 of the present embodiment (hereinafter also referred to as “napkin 1”) is a skin contact surface side as shown in FIGS. A liquid-permeable surface sheet 2 disposed on the non-skin-contacting surface side, a liquid-permeable back surface sheet 3 having liquid leakage or liquid impermeability, and both of these sheets 2, 3 A liquid-retaining absorbent 4 interposed therebetween is provided. Further, the side portion 1b of the napkin 1 on the skin contact surface side in the longitudinal direction (hereinafter referred to as “Y direction”; Y direction: a direction parallel to the center line CL) has a longitudinal direction (Y direction). Side sheets 5 are arranged over substantially the entire length. The side sheet 5 has a side portion near the center line CL overlapping the side portion 4 b in the longitudinal direction (Y direction) of the absorber 4, and is disposed above the absorber 4.
In this specification, the “skin contact surface side” indicates the side (surface) arranged toward the wearer's skin side during wearing, out of both sides (surfaces) of each member. In addition, the “non-skin contact surface side” indicates a side (surface) that is arranged toward the opposite side of the skin side of the wearer when worn, on both sides (surfaces) of each member.

As shown in FIG. 1, the napkin 1 is disposed in the excretory part region A that is in contact with the body fluid excretion part of the wearer, in the front area B that extends in front of the excretion part area A, and in the rear of the excretion part area A. And a rear region C extending. When the napkin 1 is worn, the front area B is arranged on the front (abdomen) side of the wearer and the rear area C is arranged on the rear (back) side of the wearer.

As shown in FIG. 1, the top sheet 2 covers the entire area on the skin contact surface side of the rectangular absorbent body 4 that is long in the same direction as the front-rear direction during mounting, and the longitudinal direction (Y Direction) both

ends

4a, 4a and 4a. As shown in FIG. 2, the top sheet 2 is shorter in the width direction (X direction) than the back sheet 3. As shown in FIG. 2, the side sheet 5 is on the skin contact surface side of the top sheet 2 and extends outward in the width direction (X direction) from the longitudinal direction (Y direction) side portion 4 b of the absorbent body 4. It is arranged and fixed over the entire region in the longitudinal direction (Y direction) of the side portion 2b of the top sheet 2. Fixing is performed by adhesion, fusion (heat embossing, ultrasonic embossing, high frequency embossing) or the like. As shown in FIG. 2, the back sheet 3 covers the entire region of the absorbent body 4 on the non-skin contact surface side and has a portion extending over the entire outer region of the absorbent body 4.

As shown in FIGS. 1 and 2, the napkin 1 is a side formed by fixing a side sheet 5 and a back sheet 3 that extend outward from the longitudinal direction (Y direction) side portion 4 b of the absorber 4. A flap portion 6 is provided. Fixing is performed by adhesion, fusion, or the like. As shown in FIG. 1, the side flap portion 6 largely extends outward in the width direction (X direction) in the excretion portion region A to form a wing portion 61.

Adhesives are respectively applied to the width direction (X direction) center portion of the back sheet 3 of the napkin 1 and the non-skin contact surface side of the wing portion 61 to fix the napkin 1 to shorts or the like ( (Not shown) is formed.

The napkin 1 includes a pressing groove 7 formed by compacting the top sheet 2 and the absorbent body 4. As shown in FIG. 1 and FIG. 2, the compressed groove 7 of the napkin 1 is formed in the longitudinal direction (Y direction) side of the topsheet 2 and the absorbent body 4 in the excretion part region A that is in contact with the body fluid excretion part of the wearer. It has the inner side groove | channel 71 formed in the

parts

2b and 4b, and the outer side groove | channel 72 formed in the width direction (X direction) outer side of the inner side groove | channel 71. FIG. Furthermore, the pressing groove 7 of the napkin 1 has a front groove 73 formed in the front region B and a rear groove 74 formed in the rear region C, as shown in FIG.

As shown in FIG. 1, the inner groove 71 of the compressed groove 7 is outward in the width direction (X direction) on the top sheet 2 and the

side parts

2 b and 4 b of the absorbent body 4 in the excretory part region A in plan view. It is formed in a shape that curves in a convex shape. In the napkin 1, as shown in FIG. 1, the pressing groove | channel 7 which the front groove | channel 73, the inner side groove | channel 71, and the back groove | channel 74 are connected, and becomes a cyclic | annular all-around groove | channel is formed. In this way, the inner groove 71 in the compressed groove 7 of the entire circumferential groove formed over the entire circumference is a part formed in the excretion part region A, and a center line in a part near the front region B It means a section between the portion 71b closest to CL and the portion 71c closest to the center line CL in the portion near the rear region C.

As shown in FIG. 1, the outer groove 72 of the compressed groove 7 is outward in the width direction (X direction) in plan view on the top sheet 2 and the absorber 4 on the outer side in the width direction (X direction) of the inner groove 71. It is formed in a shape that curves in a convex shape. As shown in FIG. 1, the length of the outer groove 72 in the longitudinal direction (Y direction) is longer than the length of the inner groove 71 in the longitudinal direction (Y direction). It is arranged within the range of the length of the side groove 72. In the napkin 1, as shown in FIG. 1, the curved radius of the convex inner groove 71 is smaller than the curved radius of the convex outer groove 72, and in the interval between the inner groove 71 and the outer groove 72, The distance between the top 71a of the inner groove 71 and the top 72a of the outer groove 72 is the narrowest.

The length of the napkin 1 in the longitudinal direction (Y direction) is preferably 150 mm to 420 mm. The length of the inner groove 71 in the longitudinal direction (Y direction) is preferably 85 mm to 320 mm, and more preferably 120 mm to 160 mm. The length of the outer groove 72 in the longitudinal direction (Y direction) is preferably 50 mm to 250 mm, and more preferably 80 mm to 150 mm. Length in the width direction (X direction) of the inner groove 71 (interval between one portion near the center line CL of the portion 71b of the inner groove 71 and the portion 71c of the inner groove 71 and the top portion 71a of the inner groove 71) Is preferably 15 mm to 80 mm, and more preferably 20 mm to 60 mm. The length of the outer groove 72 in the width direction (X direction) (the distance between the end portion of the outer groove 72 near the center line CL of the both ends 72b and 72c and the top portion 72a of the outer groove 72) is 20 mm. It is preferably from ˜100 mm, more preferably from 25 mm to 65 mm.

As shown in FIG. 1, the outer groove 72 of the compressed groove 7 is arranged on the outer side in the width direction (X direction) of the inner groove 71. In the napkin 1, as shown in FIG. A position where the distance between each of both

end portions

72b and 72c and a straight line SL parallel to the center line CL extending in the longitudinal direction (Y direction) of the napkin 1 and contacting the top portion 71a of the inner groove 71 is 3 mm or less. It is arranged in. One end portion 72 b of the outer groove 72 is an end portion on the front region B side in both end portions in the longitudinal direction (Y direction) of the outer groove 72, and the other end portion 72 c of the outer groove 72 is the length of the outer groove 72. It is the edge part by the side of the back region C in the both ends of a direction (Y direction). In the napkin 1, as shown in FIG. 1, both end

portions

72b and 72c of the outer groove 72 extend inward from the straight line SL. One end 72 b of the outer groove 72 is disposed at a position separated from the front groove 73, and the other end 72 c of the outer groove 72 is disposed at a position separated from the rear groove 74.

As shown in FIG. 1, the forward groove 73 of the compressed groove 7 is formed in the front region B, and is formed at one end of the inner groove 71 (center line CL in the portion of the excretion region A near the front region B). A front vertical groove portion 731 extending in the longitudinal direction (Y direction) from the same portion 71b as the nearest portion 71b, and a pair of front

vertical groove portions

731 and 731 in both

side portions

2b, 2b, 4b and 4b of the topsheet 2 and the absorber 4. It has the front connection groove part 732 which connects each

outer end part

731b and 731b. In the napkin 1, as shown in FIG. 1, the front longitudinal groove portion 731 is curved in a convex shape outward in the width direction (X direction) when viewed in plan on the top sheet 2 and the absorber 4 in the front region B. Is formed. Moreover, in the napkin 1, as shown in FIG. 1, the front connection groove part 732 is curved in a convex shape outward in the longitudinal direction (Y direction) in the top sheet 2 and the absorber 4 in the front region B in plan view. It is formed in the shape to do.

As shown in FIG. 1, the rear groove 74 of the compressed groove 7 is formed in the rear region C, and the other end of the inner groove 71 (center line in the portion of the excretion region A near the rear region C). A rear vertical groove portion 741 extending in the longitudinal direction (Y direction) from the same portion 71c as the closest to CL), and a pair of rear vertical groove portions 741, in both

side portions

2b, 2b, 4b, 4b of the topsheet 2 and the absorbent body 4 741 has a rear connecting groove portion 742 that connects the

outer end portions

741c and 741c of each. In the napkin 1, as shown in FIG. 1, the rear longitudinal groove portion 741 is shaped to be convex outwardly in the width direction (X direction) in plan view on the top sheet 2 and the absorber 4 in the rear region C. Is formed. In the napkin 1, as shown in FIG. 1, the rear connection groove 742 is curved in a convex shape outward in the longitudinal direction (Y direction) in the top sheet 2 and the absorber 4 in the rear region C in plan view. It is formed in the shape to do.

The length in the longitudinal direction (Y direction) of the front longitudinal groove portion 731 is preferably 20 mm to 200 mm, and more preferably 30 mm to 45 mm. The length in the longitudinal direction (Y direction) of the rear vertical groove 741 is also the same. In the napkin 1, as shown in FIG. 1, the curve radius of the convex inner groove 71, the curve radius of the convex front vertical groove portion 731 of the front groove 73, and the curve radius of the rear vertical groove portion 741 of the rear groove 74 are Although formed substantially the same, the curve radii of the grooves may be different. The length in the width direction (X direction) of the front vertical groove portion 731 (the distance between the top of the front vertical groove portion 731 and the portion 71b of the inner groove 71) is preferably 10 mm to 60 mm, and preferably 15 mm to 40 mm. More preferably. The length in the width direction (X direction) of the rear vertical groove 741 (the distance between the top of the rear vertical groove 741 and the portion 71c of the inner groove 71) is preferably 10 mm to 150 mm, and preferably 15 mm to 40 mm. More preferably.

In the napkin 1, as shown in FIG. 1, the length in the longitudinal direction (Y direction) of the convex forward connecting groove 732 (between the top of the front connecting groove 732 and the outer end 731b of the front vertical groove 731). Is preferably 10 mm to 60 mm, and more preferably 15 mm to 30 mm. The length in the longitudinal direction (Y direction) of the convex rear connection groove 742 (the distance between the top of the rear connection groove 742 and the outer end 741c of the rear vertical groove 741) is 10 mm to 100 mm. The thickness is preferably 15 to 30 mm.

The compressed groove 7 has a continuous line in which deeply formed portions and portions formed slightly shallower are alternately arranged. The groove widths of the inner groove 71, the outer groove 72, the front groove 73, and the rear groove 74, which are the compressed groove 7, are preferably 0.5 mm to 5 mm.

In the napkin 1, as shown in FIG. 1, two

folding lines

8 b and 8 c formed for individual packaging are formed extending in the width direction (X direction) and both ends of the outer groove 72. It is formed outward in the longitudinal direction (Y direction) with respect to the

portions

72b and 72c. As shown in FIG. 1, the folding line 8 b is formed in the front area B in front of the excretion part area A, and the folding line 8 c is formed in the rear area C behind the excretion part area A. Both the folding line 8b and the folding line 8c extend over both sides of the napkin 1 in the longitudinal direction (Y direction). In the napkin 1, the number of folding lines is two. However, in the case of a long product napkin, particularly a nighttime napkin, for example, three folding lines are formed in a region other than the excretory part region A.

The material for forming the napkin 1 of the present embodiment will be described.
As the top sheet 2, the back sheet 3, and the side sheet 5, any material that can be used for absorbent articles such as sanitary napkins can be used without particular limitation. For example, the top sheet 2 can be a hydrophilic and liquid permeable nonwoven fabric, an apertured film, or a laminate thereof, and the back sheet 3 can be a liquid impermeable or water repellent resin film, A laminate of a resin film and a non-woven fabric can be used. As the side sheet 5, the same sheet as the back sheet 3 can be used.

The absorbent body 4 can be used without particular limitation as long as it is normally used for absorbent articles such as sanitary napkins. For example, a fiber assembly made of a fiber material such as pulp, or a fiber assembly made of pulp fiber or the like, in which a fiber aggregate made of a fiber material or a superabsorbent polymer supported thereon is wrapped with a covering material such as tissue paper or a water-permeable nonwoven fabric And an absorbent sheet made of water-absorbing polymer can be used.

Examples of the processing method for forming the compressed groove 7 such as the inner groove 71, the outer groove 72, the front groove 73, and the rear groove 74 include embossing, heat embossing, ultrasonic embossing, and a combination of these. It is done.

The effect at the time of using the napkin 1 of this embodiment of this invention mentioned above is demonstrated.
As shown in FIG. 1, the napkin 1 according to the present embodiment includes a pair of

inner grooves

71 and 71 protruding outward in the width direction (X direction) and the outer side in the width direction (X direction). And a pair of

outer grooves

72, 72 protruding outward in the width direction (X direction), and the length of the outer groove 72 is longer than the length of the inner groove 71. Is disposed within the length of the outer groove 72. Therefore, the surface sheet 2 and the absorbent body 4 in the region T sandwiched between the inner groove 71 and the outer groove 72 are integrated by consolidation at the time of forming the groove 7, as shown in FIG. The surface sheet 2 and the absorber 4 in the region CT between the pair of

inner grooves

71 and 71 are not consolidated and keep flexibility. Therefore, when the napkin 1 of the present embodiment is mounted, as shown in FIG. 3, when the compressive force F toward the center in the width direction (X direction) is applied, the inner groove 71, the outer groove 72, and the region T The portion is unlikely to be a flexible shaft, and only the top sheet 2 and the absorbent body 4 in the region CT are raised toward the body fluid excretion part side of the wearer, so that the adhesion with the excretion part is improved and the leakage of body fluid is reduced. Further, in the napkin 1 of the present embodiment, only the top sheet 2 and the absorber 4 in the region CT are raised, and the inner groove 71, the outer groove 72, and the region T are difficult to separate from the crotch portion of the underwear. Is less likely to occur and the fit of the absorbent body is improved. Here, the region CT is not formed along the inner groove 71, but is a substantially rectangular region connected by the

portions

71 b and 71 c of the inner groove 71 in the present embodiment. Even so, the regions T are formed on both sides of the region CT.

Further, as shown in FIG. 1, in the napkin 1 of the present embodiment, both

end portions

72 b and 72 c of the outer groove 72 extend inward from the straight line SL that contacts the top portion 71 a of the inner groove 71. . Therefore, the surface sheet 2 and the absorbent body 4 in the region T sandwiched between the inner groove 71 and the outer groove 72 are more easily integrated due to consolidation when the groove 7 is formed. Therefore, the inner groove 71, the outer groove 72, and the region T are more difficult to separate from the crotch portion of the undergarment, so that the twist hardly occurs and the fit of the absorbent body is improved.

In the napkin 1 of the present embodiment, as shown in FIG. 1, the curved radius of the convex inner groove 71 is smaller than the curved radius of the convex outer groove 72. Among the intervals, the interval between the top portion 71a of the inner groove 71 and the top portion 72a of the outer groove 72 is formed to be the narrowest. Therefore, the surface sheet 2 and the absorbent body 4 in the region T sandwiched between the top portion 71 a of the inner groove 71 and the top portion 72 a of the outer groove 72 are more easily integrated due to consolidation at the time of forming the groove 7. Therefore, the inner groove 71, the outer groove 72, and the region T are less likely to be a flexible shaft, and only the top sheet 2 and the absorbent body 4 in the region CT are raised toward the body fluid excretion part side, and thus excreted. Adhesion with the part is further improved, and leakage of body fluid is reduced.

Further, as shown in FIG. 1, the napkin 1 of the present embodiment is formed by connecting the front groove 73, the inner groove 71, and the rear groove 74 to form an annular circumferential groove. Therefore, the napkin 1 of this embodiment can prevent the deformation | transformation of the surface sheet 2 and the absorber 4 of the area | region enclosed by the cyclic | annular groove | channel, a twist does not generate | occur | produce easily, and the fit property of an absorber improves.

Further, as shown in FIG. 1, the napkin 1 of the present embodiment has a front vertical groove portion 731 and a front connection groove portion 732 of the front groove 73 formed in a convex shape outward, and a rear vertical groove portion of the rear groove 74. 741 and the rear connection groove part 742 are formed outwardly in a convex shape. Therefore, the napkin 1 of this embodiment further prevents the deformation of the topsheet 2 and the absorber 4 in the region surrounded by the annular circumferential groove formed by the front groove 73, the inner groove 71, and the rear groove 74. Can be prevented, and the fit of the absorbent body is improved.

In the napkin 1 of the present embodiment, as shown in FIG. 1, one end 72 b of the outer groove 72 is arranged at a position spaced from the front groove 73, and the other end 72 c of the outer groove 72 is rearward. It is arranged at a position separated from the groove 74. Therefore, the napkin 1 of the present embodiment is a portion where the outer groove 72 and the front groove 73 are spaced apart from each other even when receiving a compressive force F toward the center in the width direction (X direction) as shown in FIG. , And a portion where the outer groove 72 and the rear groove 74 are separated from each other serves as a cushion, and the surface sheet 2 and the absorption in the region surrounded by the annular groove formed by the front groove 73, the inner groove 71 and the rear groove 74 The deformation of the body 4 can be further prevented, the twist hardly occurs, and the fit of the absorbent body is improved.

Further, as shown in FIG. 1, the napkin 1 of the present embodiment is formed such that each of the

folding lines

8 b and 8 c formed for individual packaging extends in the width direction (X direction) and the outer groove 72. Are formed outward in the longitudinal direction (Y direction) from both

end portions

72b and 72c. Therefore, the napkin 1 of this embodiment does not form a wrinkle in the excretion part area | region A by the

folding lines

8b and 8c, and the fit property of an absorber improves.

The absorbent article of the present invention is not limited to the napkin 1 of the present embodiment described above, and can be changed as appropriate.

For example, the napkin 1 of the present embodiment described above has the front groove 73 and the rear groove 74 as shown in FIG. Moreover, in the napkin 1 of this embodiment mentioned above, as shown in FIG. 1, although connected to the inner side groove | channel 71 and the front groove | channel 73 and the back groove | channel 74 are distribute | arranged, it does not need to be connected.

Further, in the napkin 1 of the above-described embodiment, as shown in FIG. 1, both

end portions

72 b and 72 c of the outer groove 72 are outside the longitudinal direction (Y direction) of the portion 71 b and the portion 71 c of the inner groove 71. As shown in FIG. 4A, only the end portion 72c of the outer groove 72 is arranged outward in the longitudinal direction (Y direction) from the portion 71c of the inner groove 71. It may be. In short, it is only necessary that the length of the outer groove 72 is longer than the length of the inner groove 71 and the convex top portion 71 a of the inner groove 71 is disposed within the range of the length of the outer groove 72.

Moreover, in the napkin 1 of the above-described embodiment, as shown in FIG. 1, both

end portions

72 b and 72 c of the outer groove 72 are inward from the straight line SL in contact with the top portion 71 a of the inner groove 71. However, it is sufficient that either one of them extends inward. Moreover, as shown in FIG.4 (b), both the

ends

72b and 72c of the outer side groove | channel 72 do not need to extend inward rather than the straight line SL. In that case, any one of the both

end portions

72b and 72c of the outer groove 72 may be arranged so that the distance from the straight line SL is 3 mm or less.

Further, in the napkin 1 of the above-described embodiment, as shown in FIG. 1, the curved radius of the convex inner groove 71 is smaller than the curved radius of the convex outer groove 72. 72, the distance between the top 71a of the inner groove 71 and the top 72a of the outer groove 72 is the narrowest. However, as shown in FIG. 4C, the convex inner groove 71 is formed. And the curved radius of the convex outer groove 72 may be substantially the same, and the distance between the inner groove 71 and the outer groove 72 may be the same in any part.

In the napkin 1 of the present embodiment described above, as shown in FIG. 1, the one end 72 b of the outer groove 72 is arranged at a position spaced from the front groove 73, and the other end 72 c of the outer groove 72. However, at least one end of both

end portions

72b and 72c may be in contact with the front groove 73 or the rear groove 74.

Further, in the napkin 1 of the present embodiment described above, as shown in FIG. 1, the front longitudinal groove portion 731 of the front groove 73 is formed in a shape that curves convexly outward in the width direction (X direction). The front connecting groove portion 732 of the front groove 73 is formed in a shape that curves outwardly in the longitudinal direction (Y direction), but may not be formed in a shape that curves in a convex shape. The same applies to the rear vertical groove portion 741 and the rear connection groove portion 742 of the rear groove 74.

Moreover, in the napkin 1 of this embodiment mentioned above, as shown in FIG. 1, although a pair of

side seats

5 and 5 are each arranged on the side part of a longitudinal direction (Y direction), it is arranged. It does not have to be. A pair of three-dimensional gathers may be provided instead of the pair of

side sheets

5 and 5.

Moreover, in the napkin 1 of the above-described embodiment, the

folding lines

8b and 8c are arranged as shown in FIG. 1, but they may not be arranged.

The absorbent article of the present invention can be suitably used for, for example, incontinence pads, panty liners, etc. in addition to sanitary napkins.

According to the absorbent article of the present invention, the adhesion with the excretory part is improved and the leakage of body fluid is reduced. Moreover, according to the absorbent article of this invention, a twist is hard to generate | occur | produce and the fitting property of an absorber improves.

Claims

A substantially longitudinal absorbent article comprising a liquid-permeable surface sheet on the skin contact surface side, a back sheet on the non-skin contact surface side, and an absorber disposed between these sheets,
A pair of inner grooves that are curved in a convex shape outward in the width direction in plan view are formed on both sides of the topsheet and the absorber in the excretion part region in contact with the body fluid excretion part of the wearer. ,
A pair of outer grooves curved in a convex shape outward in the width direction in plan view is formed in the top sheet and the absorber on the outer side in the width direction of each of the pair of inner grooves,
The length of the said outer side groove | channel is longer than the length of the said inner side groove | channel, The absorbent article by which the convex top part of this inner side groove | channel is distribute | arranged in the range of the length of the said outer side groove | channel.
The distance between each of both end portions of the outer groove and a straight line parallel to the center line extending in the longitudinal direction of the absorbent article and in contact with the top portion of the inner groove is 3 mm or less. The absorbent article as described.
At least one of both end portions of the outer groove is a straight line parallel to a center line extending in the longitudinal direction of the absorbent article, and is disposed inward from a straight line in contact with the top portion of the inner groove. The absorbent article according to item 1 or 2.
Each of a plurality of folding lines formed on the absorbent article for individual packaging is formed extending in the width direction, and formed on the front and rear sides in the longitudinal direction from both ends of the pair of outer grooves. The absorbent article according to any one of claims 1 to 3, wherein:
A front groove and a rear groove are formed in the front area in front of the excretion area and the rear area in the rear of the excretion area, respectively.
The front groove has a pair of front vertical groove portions extending in the longitudinal direction from one end of each of the pair of inner grooves, and a front connection groove portion connecting the outer ends of the pair of front vertical groove portions,
The rear groove has a pair of rear vertical groove portions extending in the longitudinal direction from the other end portions of the pair of inner grooves, and a rear connection portion connecting the outer end portions of the pair of rear vertical groove portions. The absorbent article according to any one of claims 1 to 4, wherein a circumferential groove is formed.
The one end part of the said outer side groove | channel is distribute | arranged to the position spaced apart from the said front groove | channel, and the other end part of the said outer side groove | channel is distribute | arranged to the position spaced apart from the said back groove | channel. Absorbent article.