TWI522091B - Absorbent items - Google Patents

Description

Absorbent article

The invention relates to an absorbent article such as a sanitary napkin, an incontinence pad and a sanitary pad (vaginal secretion pad).

Heretofore, there has been known an absorbent article in which the absorbent body is swelled toward the skin side of the wearer when the absorbent article is worn, thereby improving the adhesion to the excretion portion. The purpose of such an absorbent article is to prevent a gap between the skin contacting surface and the wearer's skin, thereby reducing leakage of body fluids along the skin contacting surface of the absorbent article or the wearer's skin.

For example, Patent Document 1 and Patent Document 2 disclose an absorbent article in which an inner compression groove and an outer compression groove extending in the longitudinal direction are provided at intervals on the left and right sides of the central absorption portion, respectively. When the compressive force toward the center line extending in the longitudinal direction acts on the outer compression groove, the inner compression groove is displaced toward the skin side from the outer compression groove, whereby the central absorption portion is directed to the skin side. Uplift.

However, the inner compression groove and the outer compression groove described in Patent Document 1 and Patent Document 2 each become a part of the flexible axis when acting as a compressive force toward the center line extending in the longitudinal direction, and therefore, not only the central absorption The portion is raised, and the regions sandwiched by the outer side compression grooves on the left and right sides are also raised. As described above, when the portion other than the central absorbent portion is raised and the region of the crotch portion away from the underwear is enlarged, the absorbent article is likely to wrinkle, which may impair the conformability of the central absorbent portion.

Patent Document 1: Japanese Patent Laid-Open Publication No. 2004-154153

Patent Document 2: Japanese Patent Laid-Open Publication No. 2004-154154

The present invention relates to an absorbent article in which an absorbent body is swelled toward the skin side of a wearer to improve adhesion to the excretion portion, and wrinkles are less likely to occur, thereby improving the conformability of the absorbent body.

The present invention relates to a substantially longitudinal absorbent article comprising a liquid permeable front sheet disposed on a skin contact surface side, a back sheet disposed on a non-skin contact surface side, and an absorbent body disposed between the sheets. . In the present invention, a pair of inner grooves are formed on both sides of the front sheet and the absorber in the excretion portion region in contact with the body fluid discharge portion of the wearer, and the pair of inner grooves are widthwise in plan view. The outer direction of the direction is convexly curved. In the present invention, a pair of outer grooves are formed in the front sheet and the absorber on the outer side in the width direction of each of the pair of inner grooves, and the pair of outer grooves are convexly curved outward in the width direction in plan view. . 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 disposed within the length of the outer groove.

Hereinafter, a preferred embodiment of the sanitary napkin which is an absorbent article of the present invention will be described with reference to Figs. 1 to 3 .

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 CL extending in the longitudinal direction of the sanitary napkin 1. Therefore, in the following description, the left-right symmetrical portion will be mainly explained to the left side. As shown in Fig. 1, the sanitary napkin 1 of the present embodiment includes a liquid permeable front sheet 2 on the skin contact surface side, a back sheet 3 on the non-skin contact surface side, and the sheets 2, 3 disposed thereon. The absorbent body 4 between them is substantially elongated. As shown in Fig. 1, the sanitary napkin 1 of the present embodiment is formed on the front sheet 2 and the both side portions 2b, 2b, 4b, 4b of the absorbent body 4 in the excretion portion region A which is in contact with the body fluid excretion portion of the wearer. The pair of inner grooves 71 and 71 are outwardly oriented in the width direction (hereinafter referred to as "X direction". The X direction: the direction perpendicular to the center line CL) in plan view. The pair of outer grooves 72 and 72 are formed in the front sheet 2 and the absorber 4 on the outer side in the width direction (X direction) of each of the pair of inner grooves 71 and 71, and the pair of outer grooves 72 are viewed in plan view. The 72 series is convexly curved outward in the width direction (X direction). As shown in FIG. 1, the sanitary napkin 1 of the present embodiment has a length of the outer groove 72 longer than the length of the inner groove 71, and a convex top portion 71a of the inner groove 71 is disposed within the length of the outer groove 72.

Next, the sanitary napkin 1 of the present embodiment will be described in detail. The sanitary napkin 1 (hereinafter also referred to as "sanitary napkin 1") of the present embodiment includes: the skin contact is arranged as shown in Figs. 1 and 2 The liquid-permeable front sheet 2 on the front side, the back sheet 3 having liquid leakage resistance such as liquid impermeability or liquid impermeability disposed on the non-skin contact surface side, and the two sheets 2, 3 The absorbent body 4 is provided with liquid retention. Moreover, the side portion 1b in the longitudinal direction of the skin contact surface side of the sanitary napkin 1 (hereinafter referred to as "Y direction". The Y direction: the direction parallel to the center line CL) is spanned in the longitudinal direction (Y direction). The side sheets 5 are disposed substantially in the entire length. The side portion of the side sheet 5 close to the center line CL overlaps the side portion 4b in the longitudinal direction (Y direction) of the absorber 4, and is disposed above the absorber 4.

In the present specification, the "skin contact surface side" means a side (face) disposed on both sides (faces) of each member and facing the skin side of the wearer when worn. In addition, the "non-skin contact surface side" is a side (face) which is disposed on both sides (faces) of each member and faces the side opposite to the wearer's skin side when worn.

As shown in FIG. 1, the sanitary napkin 1 includes a drain portion region A that comes into contact with the body fluid discharge portion of the wearer, a front region B that extends toward the front of the drain portion region A, and a rear region that extends toward the rear of the drain portion region A. C. When the sanitary napkin 1 is worn, the front region B is disposed on the front (abdominal) side of the wearer, and the rear region C is disposed on the rear (back) side of the wearer.

As shown in FIG. 1, the front sheet 2 covers the entire skin contact surface side of the long rectangular absorbent body 4 in the same direction as the front and rear directions when worn, and includes the longitudinal direction of the self-absorbent body 4 (Y direction). The ends of the both end portions 4a, 4a extend outwardly. As shown in FIG. 2, the front sheet 2 has a length in the width direction (X direction) shorter than that of the back sheet 3. As shown in FIG. 2, the side sheet 5 is the skin contact surface side of the surface sheet 2, and extends outward in the width direction (X direction) from the longitudinal direction (Y direction) side portion 4b of the absorber 4, spanning the front sheet. The side portion 2b of the 2 is disposed in the entire length direction (Y direction) and fixed. The fixing is performed by bonding, fusion (hot stamping, ultrasonic embossing, high frequency imprinting) or the like. As shown in FIG. 2, the back sheet 3 covers the entire non-skin contact surface side of the absorber 4, and includes a portion extending beyond the entire outer surface of the absorber 4.

As shown in FIG. 1 and FIG. 2, the sanitary napkin 1 includes a side flap portion 6 which is a side sheet 5 which extends outward in the longitudinal direction (Y direction) side portion 4b of the self-absorbent body 4, and a back sheet 3 It is formed by fixing. The fixing is performed by following, melting, or the like. As shown in FIG. 1, the side flap portion 6 is extended outward in the width direction (X direction) in the drain portion region A to form the wing portion 61.

An adhesive is applied to the central portion of the back sheet 3 of the sanitary napkin 1 in the width direction (X direction) and the non-skin contact surface side of the wing portion 61 to form a fixing portion for fixing the sanitary napkin 1 to the shorts or the like. (not shown).

The sanitary napkin 1 includes a squeeze strip groove 7 formed by compacting the front sheet 2 and the absorbent body 4. As shown in FIG. 1 and FIG. 2, the squeezing strip groove 7 of the sanitary napkin 1 includes an inner groove 71 and an outer groove 72 formed in an excretory area contacting the body fluid discharge portion of the wearer. In the longitudinal direction (Y direction) side portions 2b and 4b of the front sheet 2 and the absorber 4 in A, the outer groove 72 is formed on the outer side in the width direction (X direction) of the inner groove 71. Further, as shown in FIG. 1, the squeeze strip groove 7 of the sanitary napkin 1 includes a groove 73 formed in the front region B and a groove 74 formed in the rear region C.

As shown in FIG. 1, the inner groove 71 of the extruded strip groove 7 has a shape which is convexly curved outward in the width direction (X direction) in plan view, and is formed in the front sheet 2 in the drain portion area A, respectively. And the side portions 2b, 4b of the absorber 4. In the sanitary napkin 1, as shown in Fig. 1, the front groove 73, the inner groove 71, and the rear groove 74 are connected to each other to form an extruded strip groove 7 which is an annular circumferential groove. The inner groove 71 in the squeezing strip groove 7 of the full-circumferential groove thus formed across the entire circumference is formed in a portion in the drain portion area A, and refers to a distance center in a portion close to the front region B The portion between the portion 71b closest to the line 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 extruded strip groove 7 is formed in a convex shape in the width direction (X direction) in a convex shape, and is formed in the width direction of the inner groove 71 (X direction). The outer front sheet 2 and the absorber 4 are on the outer side. 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 (Y direction), and the convex top portion 71a of the inner groove 71 is disposed on the outer groove 72. Within the length range. In the sanitary napkin 1, as shown in FIG. 1, the curved inner radius of the convex 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 inner groove The spacing between the top 71a of the groove 71 and the top 72a of the outer groove 72 is formed to be the narrowest.

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

As shown in FIG. 1, the outer groove 72 of the extruded strip groove 7 is disposed outside the width direction (X direction) of the inner groove 71, and the sanitary napkin 1 is disposed on the outer groove as shown in FIG. The distance between the end portions 72b and 72c of the groove 72 and the straight line SL is 3 mm or less, respectively, and the straight line SL is parallel to the center line CL extending along the longitudinal direction (Y direction) of the sanitary napkin 1 and the inner groove. The line at the top 71 of the 71 is tangent to the line. One end portion 72b of the outer groove 72 is an end portion on the front side region B side in the longitudinal direction (Y direction) of the outer groove 72, and the other end portion 72c of the outer groove 72 is the outer groove 72. The end portion on the rear side region C side of the both end portions in the longitudinal direction (Y direction). Further, in the sanitary napkin 1, as shown in Fig. 1, both end portions 72b, 72c of the outer groove 72 extend to the inner side of the straight line SL. One end portion 72b of the outer groove 72 is disposed at a position apart from the front groove 73, and the other end portion 72c of the outer groove 72 is disposed at a position apart from the rear groove 74.

The front groove 73 is formed in the front region B as shown in FIG. 1. The front groove 73 includes a front longitudinal groove portion 731 and a front connecting groove portion 732, and the front longitudinal groove portion 731 is extending from the end portion of the inner groove 71 (the portion closest to the portion 71b closest to the center line CL in the portion of the excretion portion region A near the front region B) in the longitudinal direction (Y direction), and the front link is connected The groove portion 732 connects one of the side portions 2b, 2b, 4b, and 4b of the front sheet 2 and the absorber 4 to the outer end portions 731b and 731b of the front longitudinal groove portions 731 and 731. In the sanitary napkin 1, as shown in FIG. 1, the front longitudinal groove portion 731 is convexly curved outward in the width direction (X direction) in plan view, and the front sheet 2 and the absorbent sheet formed in the front region B are absorbed. On body 4. Further, in the sanitary napkin 1, as shown in FIG. 1, the front connecting groove portion 732 is formed in a convex shape in the longitudinal direction (Y direction) in a plan view, and is formed in the front sheet B in the front region B. And on the absorber 4.

The groove groove 74 is formed in the rear region C as shown in FIG. 1 , and the rear groove 74 includes a rear longitudinal groove portion 741 and a rear connection groove portion 742, and the rear longitudinal groove portion The other end portion of the inner groove 71 extends from the other end portion of the inner groove 71 (the same portion as the portion 71c closest to the center line CL in the portion of the excretion portion region A near the rear region C), and extends in the longitudinal direction (Y direction). The groove portion 742 connects one of the side portions 2b, 2b, 4b, and 4b of the front sheet 2 and the absorber 4 to the outer end portions 741c and 741c of the rear longitudinal groove portions 741 and 741. In the sanitary napkin 1, as shown in FIG. 1, the rear longitudinal groove portion 741 is convexly curved outward in the width direction (X direction) in plan view, and the front sheet 2 and the absorbent sheet formed in the rear region C are absorbed. On body 4. Further, in the sanitary napkin 1, as shown in FIG. 1, the rear connecting groove portion 742 is convexly curved outward in the longitudinal direction (Y direction) in plan view, and the front sheet 2 formed in the rear region C is formed. And on the absorber 4.

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

As shown in FIG. 1, the sanitary napkin 1 has a length in the longitudinal direction (Y direction) of the convex front connecting groove portion 732 (the top of the front connecting groove portion 732 and the outer end portion of the front longitudinal groove portion 731). The interval between 731b is preferably 10 mm to 60 mm, more preferably 15 mm to 30 mm. The length of the convex rear connecting groove portion 742 in the longitudinal direction (Y direction) (the interval between the top of the rear connecting groove portion 742 and the outer end portion 741c of the rear longitudinal groove portion 741) is preferably 10 mm. ~100mm, more preferably 15mm~30mm.

In the extruded strip groove 7, the portion formed deeper is alternately arranged with the portion formed slightly shallower than the portion, thereby forming a continuous line. The groove width of the inner groove 71, the outer groove 72, the front groove 73, and the rear groove 74 of the pressing strip groove 7 is preferably 0.5 mm to 5 mm.

In the sanitary napkin 1, as shown in FIG. 1, the two bending lines 8b, 8c formed for independent packaging are respectively formed to extend in the width direction (X direction), and are formed in the outer side grooves 72. The end portions 72b and 72c are closer to the outside in the longitudinal direction (Y direction). The bending line 8b is formed in the front front area B in the front side of the drain portion area A as shown in FIG. 1, and the bending line 8c is formed in the rear rear side area C of the drain portion area A. Both the bending line 8b and the bending line 8c extend across both side portions of the longitudinal direction (Y direction) of the sanitary napkin 1. In the sanitary napkin 1, the number of the bending lines is two, but in the sanitary napkin having a long product length, particularly the night sanitary napkin, for example, three bending lines are formed in the region other than the excretion portion area A.

Next, the material for forming the sanitary napkin 1 of the present embodiment will be described.

The front sheet 2, the back sheet 3, and the side sheets 5 are not particularly limited as long as they are generally used for absorbent articles such as sanitary napkins. For example, as the front sheet 2, a hydrophilic and liquid permeable non-woven fabric, an apertured film, a laminated body thereof, or the like can be used, and as the back sheet 3, a liquid impervious or water repellent resin film or resin can be used. A laminate of a film and a non-woven fabric. As the side sheet 5, the same as the back sheet 3 can be used.

The absorbent body 4 is not particularly limited as long as it is generally used for an absorbent article such as a sanitary napkin. For example, a coating material such as a tissue paper or a water-permeable non-woven fabric may be used, and a fiber aggregate of a fiber material such as pulp or a polymer carrying a superabsorbent polymer may be coated; and a pulp containing the same may be used. A fiber aggregate such as a fiber or an absorbent sheet of a water-absorbent polymer.

The processing method of forming the groove groove 7 such as the inner groove 71, the outer groove 72, the front groove 73, and the rear groove 74 may be exemplified by imprint processing, hot imprint processing, and ultrasonic embossing. And its combined processing methods, etc.

Next, the action and effect when the sanitary napkin 1 of the present embodiment of the present invention is used will be described.

As shown in FIG. 1, the sanitary napkin 1 of the present embodiment includes a pair of inner grooves 71, 71 and a pair of outer grooves 72, 72 which are located in the drain portion area A and are oriented in the width direction. (X direction) is convex outward, and the pair of outer grooves 72, 72 are located outward in the width direction (X direction) and protrude outward in the width direction (X direction), and the length of the outer groove 72 is longer than the inner groove The length of the groove 71 and the convex top portion 71a of the inner groove 71 are disposed within the length of the outer groove 72. Therefore, the front sheet 2 and the absorber 4 of the region T sandwiched by the inner groove 71 and the outer groove 72 are integrated as shown in FIG. 3 by the densification when the groove 7 is formed, and the other is integrated. On the other hand, the front sheet 2 and the absorber 4 of the region CT between the pair of inner grooves 71 and 71 are not densified, and the flexibility is maintained. Therefore, when the sanitary napkin 1 of the present embodiment is worn, as shown in FIG. 3, when the compressive force F toward the center in the width direction (X direction) acts, the inner groove 71, the outer groove 72, and the region T are applied. The portion is less likely to be a flexible shaft, and only the front sheet 2 and the absorber 4 of the region CT are swelled toward the body fluid discharge portion side of the wearer. Therefore, the adhesion to the excretion portion is improved, and leakage of body fluid is reduced. Further, in the sanitary napkin 1 of the present embodiment, only the front sheet 2 and the absorbent body 4 of the region CT are swelled, and the portions of the inner groove 71, the outer groove 72, and the region T are not easily separated from the crotch portion of the underwear, so that it is less likely to be generated. The wrinkles are such that the conformability of the absorbent body is improved. Here, the region CT is not formed along the inner groove 71. In the present embodiment, the region CT is a substantially rectangular region formed by the portions 71b and 71c of the inner groove 71, and the inner portion of the inner groove 71 is also A region T is formed on both sides of the region CT.

Further, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment has both end portions 72b and 72c of the outer groove 72 extending to the inner side of the straight line SL which is in contact with the top portion 71a of the inner groove 71. Therefore, the front sheet 2 and the absorber 4 of the region T sandwiched by the inner groove 71 and the outer groove 72 are more easily integrated by the densification when the strip groove 7 is formed. Therefore, the portions of the inner groove 71, the outer groove 72, and the region T are more difficult to be separated from the crotch portion of the underwear, so that wrinkles are less likely to occur, and the conformability of the absorbent body is improved.

Further, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment has a curved radius of the convex inner groove 71 which is smaller than the curved radius of the convex outer groove 72, and is spaced between the inner groove 71 and the outer groove 72. The interval between the top 71a of the inner groove 71 and the top 72a of the outer groove 72 is formed to be the narrowest. Therefore, the front sheet 2 and the absorber 4 of the region T between the top portion 71a of the inner groove 71 and the top portion 72a of the outer groove 72 are more easily integrated by the densification when the strip groove 7 is formed. Therefore, it is more difficult for the inner groove 71, the outer groove 72, and the portion T to be a flexible shaft, and only the front sheet 2 and the absorber 4 of the region CT are swelled toward the body fluid discharge portion side of the wearer, and therefore, the excretion portion The adhesion is further improved to reduce leakage of body fluids.

Further, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment has a front groove 73, an inner groove 71, and a rear groove 74 connected to each other to form an annular full-circle groove. Therefore, the sanitary napkin 1 of the present embodiment can prevent deformation of the front sheet 2 and the absorbent body 4 in the region surrounded by the annular groove, and wrinkles are less likely to occur, and the conformability of the absorbent body is improved.

Further, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment has a front square groove portion 731 and a front connecting groove portion 732 which are outwardly squared in a convex shape, and a rear longitudinal groove portion 74 in the rear longitudinal groove portion. The 741 and the rear connecting groove portion 742 are squared outward to have a convex shape. Therefore, the sanitary napkin 1 of the present embodiment can further prevent the front sheet 2 and the absorbent body 4 in the region surrounded by the annular full-circumferential groove formed by the front groove 73, the inner groove 71, and the rear groove 74. The deformation is less likely to cause wrinkles, and the conformability of the absorbent body is improved.

Further, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment has one end portion 72b of the outer groove 72 disposed at a position apart from the front groove 73, and the other end portion 72c of the outer groove 72 is disposed at the rear side. The trenches 74 are separated from each other. Therefore, when the sanitary napkin 1 of the present embodiment is worn, as shown in FIG. 3, even if the compression force F toward the center in the width direction (X direction) is received, the outer groove 72 and the front groove 73 are separated from each other, and The portion of the outer groove 72 and the rear groove 74 also functions as a buffer, thereby further preventing the annular groove formed by the front groove 73, the inner groove 71 and the rear groove 74 from being enclosed. The deformation of the front sheet 2 and the absorbent body 4 in the region is less likely to cause wrinkles, and the conformability of the absorbent body is improved.

Further, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment is formed such that the bent lines 8b and 8c for independent packaging are formed to extend in the width direction (X direction), and are formed in the outer side grooves 72. Both end portions 72b and 72c are closer to the outside in the longitudinal direction (Y direction). Therefore, in the sanitary napkin 1 of the present embodiment, since the bending lines 8b and 8c are provided, wrinkles are not formed in the excretion portion region A, and the conformability of the absorbent body is improved.

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

For example, the sanitary napkin 1 of the above-described embodiment includes the front groove 73 and the rear groove 74 as shown in FIG. 1, but the front groove 73 and the rear groove 74 may not be included. Further, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 1, the front groove 73 and the rear groove 74 are disposed in contact with the inner groove 71. However, the front groove 73 and the rear groove 74 may not be provided. It is connected to the inner groove 71 described above.

Further, in the sanitary napkin 1 of the present embodiment, as shown in Fig. 1, the both end portions 72b and 72c of the outer groove 72 are disposed in the longitudinal direction (Y direction) of the portion 71b of the inner groove 71 and the portion 71c of the inner groove 71, respectively. Alternatively, as shown in FIG. 4(a), only the end portion 72c of the outer groove 72 may be disposed closer to the longitudinal direction (Y direction) than the portion 71c of the inner groove 71. In short, the length of the outer groove 72 is longer than the length of the inner groove 71, and the convex top 71a of the inner groove 71 is disposed within the length of the outer groove 72.

Further, in the sanitary napkin 1 of the present embodiment, as shown in Fig. 1, both end portions 72b and 72c of the outer groove 72 extend to the inner side of the straight line SL which is in contact with the top portion 71a of the inner groove 71, but as long as Any one of them can be extended to the inside. Further, as shown in FIG. 4(b), both end portions 72b and 72c of the outer groove 72 may not extend to the inner side of the straight line SL. In this case, any one of the both end portions 72b and 72c of the outer groove 72 may be disposed so as to be spaced apart from the straight line SL by 3 mm or less.

Further, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 1, the curved inner radius of the convex inner groove 71 is smaller than the curved radius of the convex outer groove 72, and the inner groove 71 and the outer groove 72 are In the interval, the interval between the top 71a of the inner groove 71 and the top 72a of the outer groove 72 is formed to be the narrowest, but as shown in FIG. 4(c), the curved radius and convex of the convex inner groove 71 are also shown. The curved radius of the outer side groove 72 is substantially the same, and the interval between the inner side groove 71 and the outer side groove 72 is formed to be the same in any portion.

Further, in the sanitary napkin 1 of the above-described embodiment, as shown in Fig. 1, one end portion 72b of the outer groove 72 is disposed at a position apart from the front groove 73, and the other end portion 72c of the outer groove 72 is disposed. At a position away from the rear groove 74, at least one end of the both end portions 72b, 72c may be in contact with the front groove 73 or the rear groove 74.

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

Further, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 1, the pair of side sheets 5 and 5 are disposed on the side portions in the longitudinal direction (Y direction), but the pair of side sheets 5 may not be disposed. 5. Further, a pair of three-dimensional gathers may be provided instead of the pair of side sheets 5, 5.

Further, in the sanitary napkin 1 of the above-described embodiment, as shown in Fig. 1, the bending lines 8b and 8c are disposed, but the bending lines 8b and 8c may not be disposed.

The absorbent article of the present invention can be applied to, for example, an incontinence pad, a panty liner or the like in addition to a sanitary napkin.

Industrial availability

According to the absorbent article of the present invention, the adhesion to the excretion portion is improved, thereby reducing leakage of body fluid. Moreover, according to the absorbent article of the present invention, wrinkles are less likely to occur, and the conformability of the absorbent body is improved.

1. . . Sanitary cotton

1b, 2b, 4b. . . Side

2. . . Front sheet

3. . . Back sheet

4. . . Absorber

4a, 72b, 72c. . . Ends

5. . . Side sheet

6. . . Flank

7. . . Squeeze strip groove

8b, 8c. . . Bending line

71. . . Inner groove

71a, 72a. . . top

71b, 71c. . . Part

72. . . Outer groove

73. . . Front groove

74. . . Rear groove

731. . . Front longitudinal groove

731b, 741c. . . External end

732. . . Front connecting groove

741. . . Rear longitudinal groove

742. . . Rear connecting groove

A. . . Excretory area

B. . . Front area

C. . . Rear area

CL. . . Center line

CT, T. . . region

F. . . Compression force

SL. . . straight line

X, Y. . . direction

X1. . . line

Figure 1 is a plan view showing a sanitary napkin of the present embodiment of the present invention;

Figure 2 is a sectional view taken along line X1-X1 of Figure 1;

Figure 3 is a cross-sectional view taken along line X1-X1 of the sanitary napkin of the present embodiment;

4(a) to 4(c) are plan views showing main parts of the relationship between the inner groove and the outer groove in the sanitary napkin according to another embodiment of the present invention.

1. . . Sanitary cotton

1b, 2b, 4b. . . Side

2. . . Front sheet

3. . . Back sheet

4. . . Absorber

4a, 72b, 72c. . . Ends

5. . . Side sheet

6. . . Flank

7. . . Squeeze strip groove

8b, 8c. . . Bending line

61. . . Wing

71. . . Inner groove

71a, 72a. . . top

71b, 71c. . . Part

72. . . Outer groove

73. . . Front groove

74. . . Rear groove

731. . . Front longitudinal groove

731b, 741c. . . External end

732. . . Front connecting groove

741. . . Rear longitudinal groove

742. . . Rear connecting groove

A. . . Excretory area

B. . . Front area

C. . . Rear area

CL. . . Center line

SL. . . straight line

X, Y. . . direction

X1. . . line

Claims (6)

An absorbent article comprising a liquid permeable front sheet on the skin contacting side, a back sheet on the non-skin contact side, and a substantially longitudinal absorbent of the absorbent disposed between the sheets The article has a pair of inner grooves formed on both sides of the front sheet and the absorber in the excretion area in contact with the body fluid discharge portion of the wearer, and the pair of inner grooves are oriented in the width direction in plan view. The side is convexly curved, and a pair of outer grooves are formed on the front sheet and the absorber on the outer side in the width direction of each of the pair of inner grooves, and the pair of outer grooves are convex outward in the width direction in plan view. The exudate portion includes a side wing portion, and the inner side groove and the outer side groove which are outwardly curved in a convex portion at a region where the side wing portion exists, in the drain portion region The length of the outer groove is longer than the length of the inner groove, and the convex top of the inner groove is disposed within the length of the outer groove. The absorbent article of claim 1, wherein a distance between each of the end portions of the outer groove and a line tangential to the top of the inner groove is 3 mm or less, wherein the top portion of the inner groove is The cut straight line is a straight line parallel to the center line extending along the longitudinal direction of the absorbent article. An absorbent article according to claim 1 or 2, wherein both ends of said outer groove At least one of the portions is disposed further inward than a line tangential to the top of the inner groove, wherein a straight line tangential to the top of the inner groove extends along a length of the absorbent article The center line is parallel to the line. The absorbent article of claim 1 or 2, wherein the plurality of bending lines formed on the absorbent article for independent packaging are respectively formed to extend in the width direction, and are formed in each of the pair of outer grooves Both ends are located further in the longitudinal direction before and after the outside. The absorbent article according to claim 1 or 2, wherein a front groove and a rear groove are formed in a front region in front of the front portion of the drain portion and a rear region of the drain portion, wherein the front groove includes: One of the pair of inner grooves is extended in the longitudinal direction from one end of each of the pair of inner grooves; the front longitudinal groove portion is connected; and the outer end portions of the pair of the front longitudinal groove portions are connected to each other before the groove portion is connected The rear groove includes: one pair of rear longitudinal groove portions extending in a longitudinal direction from the other end of each of the pair of inner grooves; and a pair of the outer longitudinal end portions of the pair of the rear longitudinal groove portions are connected to each other Thereafter, the groove portion is joined; thereby, a groove is formed over the entire circumference. The absorbent article of claim 5, wherein one end of the outer groove is disposed at a position apart from the front groove, and the other end of the outer groove is disposed at a position apart from the rear groove .