JP2019063010A - pad - Google Patents

Abstract

To provide a pad including an absorber excellent in diffusibility and leakage prevention performance of liquid, while maintaining flexibility.SOLUTION: A plurality of first grooves extending in the longer direction at prescribed intervals in the width direction of an absorber are formed on an inner surface on the body surface side of the absorber, and a plurality of second grooves extending in the width direction at prescribed intervals in the longer direction of the absorber are formed on an outer surface on the opposite body surface side of the absorber, and a lower part of the first grooves and an upper part of the second grooves are formed separately at a prescribed interval in a cross sectional view.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a pad, and more particularly to a pad having excellent flexibility and liquid diffusion performance.

  Conventionally, a first groove extending in the front-rear direction and the width direction of the absorber is formed on the inner surface of the absorber located on the body side of the wearer, and the absorber is divided into rectangular absorbers. A means has been proposed for forming a second groove, such as a circle, on the outer surface of the absorber of the shape located on the side opposite to the body surface. (Patent Document 1)

  In addition, a first groove extending in the left-right direction at a predetermined interval in the front-rear direction of the absorber is formed on the inner surface of the absorber, and a predetermined distance in the front-rear direction of the absorber is formed on the outer surface of the absorber. A means has been proposed for forming second grooves extending in the left-right direction with a space between them and aligning the positions of the first and second grooves in plan view. (Patent Document 2)

JP, 2014-97241, A JP, 2016-34598, A

  However, according to the means of Patent Document 1, a liquid such as urine which has moved to the absorber is diffused in the width direction by the first groove formed extending in the width direction of the absorber, and the width direction of the absorber The liquid may leak from the left and right ends of the

  Further, with the means of Patent Document 2, the liquid moved to the absorber can not be rapidly diffused to the front and back portions of the absorber in the front-rear direction, and the liquid extends in the width direction of the absorber. There is a possibility that the liquid may be diffused from the left and right ends in the width direction of the absorber due to the diffusion in the width direction by the first groove formed.

  Therefore, an object of the present invention is to provide a pad having an absorber excellent in liquid diffusibility and leakage prevention performance while maintaining flexibility.

The means for solving the above problems are as follows.
The first means is a pad comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber provided between the top sheet and the back sheet.
A plurality of first grooves extending in the longitudinal direction at predetermined intervals in the width direction of the absorber are formed on the inner surface, which is the body surface side of the absorber, on the opposite body surface side of the absorber A plurality of second grooves extending in the width direction at predetermined intervals in the longitudinal direction of the absorber are formed on the outer surface, and the lower portion of the first groove and the upper portion of the second groove are predetermined in cross section. It is characterized in that it is spaced apart from each other.

  In the second means, in the configuration of the first means, the absorber is formed of an inner side absorber on the body side and an outer side absorber on the opposite side of the body side, and the content of the absorbent polymer in the inner side absorber is The content ratio of the absorbent polymer of the outer absorbent body is made higher, and the depth of the first groove is formed to be equal to or larger than the thickness of the inner absorbent body in a cross sectional view.

  According to the third means, in the configuration of the first or second means, the interval in the width direction of the first groove adjacent to the first groove is formed wider as it is provided from the central portion in the width direction of the absorber to the left and right It is characterized by

  A fourth means is the structure according to any one of the first to third aspects, wherein a longitudinal direction of a second groove adjacent to the second groove is a longitudinal direction at a portion corresponding to a constricted portion of the absorber. It is characterized in that it is widely formed as it is provided on the front and back sides from the central part of the.

  A fifth means is according to any one of the first to fourth means, wherein the first groove is formed in the vicinity of the rear side near the rear end of the front end in the longitudinal direction of the absorber and the front side near the rear end in the longitudinal direction. It is characterized in that it extends to a portion.

  A sixth means, in the configuration of the means according to any one of the first to fifth aspects, extends longitudinally from the top of the right side a first groove provided on the left side of the widthwise central part of the absorber. The first groove provided on the right side of the widthwise central part of the absorber is formed on the right side in the widthwise direction as it extends longitudinally from the top of the left side. It is characterized by being curved and formed.

  The seventh means is the structure of the means of any one of the first to sixth aspects, wherein the second groove provided on the front side with respect to the central portion in the longitudinal direction at the portion corresponding to the narrow portion of the absorber The second groove is formed on the front side in the longitudinal direction as it extends in the width direction from the top of the body, and the second groove is provided in the rear side of the longitudinal center in the area corresponding to the constriction of the absorber. The device is characterized in that it is formed to be curved rearward in the longitudinal direction as it extends in the width direction from the top of the front side.

  According to an eighth means, in the configuration of the means according to any one of the first to seventh aspects, the fiber density of the absorber at a portion where the first groove and the second groove intersect in plan view is formed higher than other portions. It is characterized by

  According to the first means, a plurality of first grooves extending in the longitudinal direction at predetermined intervals in the width direction of the absorber are formed on the inner surface which is the body surface side of the absorber, A plurality of second grooves extending in the width direction at predetermined intervals in the longitudinal direction of the absorber are formed on the outer surface which is the surface side, and the lower part of the first groove and the upper part of the second groove Since the liquid is separated at a predetermined distance, the liquid such as urine which has moved from the top sheet to the absorber can be rapidly diffused to the front and back of the absorber in the longitudinal direction by the first groove. In addition, the absorber can be easily deformed toward the inner surface centering on the second groove which is small in rigidity and excellent in flexibility. Further, since the second groove extending in the width direction is formed on the outer surface of the absorber, the liquid moved from the top sheet to the absorber is prevented from leaking from the left and right ends in the width direction of the absorber. be able to.

  According to the second means, in addition to the effect by the first means, the absorber is formed by the inner side absorber on the body side and the outer side absorber on the side opposite to the body side, and the content of the absorbent polymer in the inner side absorber Is made higher than the content rate of the absorbent polymer of the outer absorbent body, and the depth of the first groove is formed to be equal to or greater than the thickness of the inner absorbent body in cross sectional view. Can be absorbed by the upper absorber adjacent to the first groove to suppress the reversion of the liquid.

  According to the third means, in addition to the effect by the first or second means, the space in the width direction of the first groove adjacent to the first groove is formed wider as it is provided from the central portion in the width direction of the absorber to the left and right Therefore, the left and right sides in the width direction of the absorber can be efficiently deformed toward the inner surface centering on the first groove.

  According to the fourth means, in addition to the effect of any of the first to third means, the distance between the second groove and the second groove adjacent to the second groove in the region corresponding to the constricted portion of the absorber As it is formed wider as it is provided on the front and back sides from the center in the longitudinal direction, the front and rear portions in the longitudinal direction of the absorber can be efficiently deformed toward the inner surface centering on the second groove.

  According to the fifth means, in addition to the effect of any of the first to fourth means, the first groove is formed from the rear side vicinity portion of the front end portion in the longitudinal direction of the absorber to the rear end portion in the longitudinal direction Since it has been formed extending to the front vicinity, it is possible to suppress leakage of the liquid moved from the surface sheet to the absorber from the front and rear end portions in the longitudinal direction of the absorber.

  According to the sixth means, in addition to the effect of any of the first to fifth means, the first groove provided on the left side of the widthwise central portion of the absorber is longitudinally extended from the top on the right side The first groove is formed to be curved to the left side in the width direction as it extends in the width direction, and the first groove provided on the right side of the center portion in the width direction of the absorber extends in the width direction as it extends longitudinally from the top of the left side. Since it is curved to the right and formed, the liquid moved from the surface sheet to the absorber can be rapidly diffused to the left and right sides in the width direction at the front and rear of the absorber in the longitudinal direction by the first groove, and The left and right sides in the width direction of the absorber can be more efficiently deformed toward the inner surface centering on the first groove.

  According to the seventh means, in addition to the effect of any of the first to sixth means, the second groove provided on the front side with respect to the longitudinal central portion in the portion corresponding to the constriction portion of the absorber A second portion provided on the rear side of the longitudinal center at a portion corresponding to the constriction portion of the absorbent body, curved in the longitudinal direction as it extends in the width direction from the top of the rear side; The grooves are formed to be curved rearward in the longitudinal direction as they extend in the width direction from the top of the front side, so that the front and rear portions of the absorber in the longitudinal direction about the second grooves are more efficiently deformed toward the inner surface It can be done.

  According to the eighth means, in addition to the effect of any of the first to seventh means, the fiber density of the absorber of the portion where the first groove and the second groove intersect in plan view is higher than that of the other portion Since it formed high, it is suppressed that the liquid which moves the 1st groove 20 moves into the 2nd groove via the part which the 1st groove and the 2nd groove intersect, and the left and right end of the width direction of the absorber Leakage can be further suppressed.

It is an inner surface top view of a pad. It is an external surface top view of a pad. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is an explanatory view of a solid gather. It is an inner surface top view of the absorber of 1st Embodiment. It is an outer surface top view of the absorber of 1st Embodiment. (A) of FIG. 7 is an A-A cross-sectional view, and (b) is a B-B cross-sectional view. It is an inner surface top view of the absorber of 2nd Embodiment. It is an outer surface top view of the absorber of 2nd Embodiment. (A) of FIG. 10 is an A-A sectional view, and (b) is a B-B sectional view. It is an inner surface top view of the absorber of 3rd Embodiment. It is an outer surface top view of the absorber of 3rd Embodiment.

<Pad of First Embodiment>
As shown in FIGS. 1 to 5, the pad of the first embodiment installed in a disposable diaper such as a pants type has a liquid-permeable top sheet 11 and a liquid in this order from the inner surface side located on the body surface side of the wearer And a back sheet 13 impervious to liquid, and an exterior sheet 14 made of non-woven fabric or the like. Moreover, the solid gathers 15 are provided in the both sides of the width direction of the absorber 12 in planar view.

  The absorbent body 12 is formed with a constricted portion 12D substantially in the middle in the front-rear direction ("longitudinal direction" in the claims) corresponding to the crotch of the wearer. In the present specification, for convenience, the front portion in the front-rear direction of the narrow portion 12D of the absorbent body 12 corresponding to the front body of the wearer is referred to as a front body 12C, and the absorbent body 12 corresponding to the rear body of the wearer The rear portion in the front-rear direction than the constricted portion 12D is referred to as a back portion 12E.

  A rectangular front locking member 18A having a long side in the width direction is provided at the position of the front end of the front body 12C on the outer surface of the outer cover sheet 14, and the rear end of the rear body 12E on the outer surface of the outer cover sheet 14 At the position of (3), a rectangular rear side locking member 18B having a long side in the width direction is provided. In the present specification, for convenience, the front locking member 18A and the rear locking member 18B are collectively referred to as the locking member 18.

  The surface sheet 11 is preferably a non-porous or non-porous non-woven fabric, a porous plastic sheet or the like. The material fibers constituting the non-woven fabric may be synthetic fibers of olefins such as polyethylene or polypropylene, polyesters, polyamides, etc., regenerated fibers such as rayon or cupra, or natural fibers such as cotton. Nonwoven fabrics obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a meltblown method, a needle punch method or the like can be used. Among these processing methods, the spunlace method is excellent in flexibility and drapability, and the thermal bonding method is excellent in bulk and softness. When many through holes are formed in the surface sheet 11, urine etc. will be absorbed rapidly, and it will be excellent in dry touch property.

  The front end in the front-rear direction of the top sheet 11 extends forward of the front end in the front-rear direction of the absorber 12 and is fixed to the front end in the front-rear direction of the back sheet 13. The rear end portion extends in the rear side direction from the rear end portion in the front-rear direction of the absorbent body 12 and is fixed to the rear end portion in the front-rear direction of the back sheet 13. Further, the left end portion in the width direction of the top sheet 11 extends leftward relative to the left end portion in the width direction of the absorbent body 12 and is fixed to the left end portion in the width direction of the back sheet 13. The right end in the direction extends to the right from the right end in the width direction of the absorbent body 12 and is fixed to the right end in the width direction of the back sheet 13.

  As the absorber 12, a known one, for example, a pile of pulp fibers, an assembly of filaments such as cellulose acetate, or a non-woven fabric is used as a basis, and a superabsorbent polymer is mixed and fixed as needed. Can be used. The absorbent body 12 is packaged by a liquid-permeable crepe paper or the like in order to prevent the superabsorbent polymer or the like from falling off.

  The length in the front-rear direction of the constricted portion 12D is formed to be 20 to 50% of the length direction in the front-rear direction of the absorber 12, and the narrowest width in the width direction of the constricted portion 12D is the width of the absorber 12 in the width direction It is formed to 40 to 60%. As a result, the pad can be brought into close contact with the wearer to improve the fitting performance.

  As the back sheet 13, a liquid impermeable plastic sheet such as polyethylene or polypropylene is used, but in recent years, one having moisture permeability is preferable from the viewpoint of preventing bleeding. The water-impervious and moisture-permeable sheet is, for example, a microporous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. . In addition, an exterior sheet 14 is fixed to the outer surface of the back sheet 13.

  The exterior sheet 14 is preferably a non-porous or non-porous non-woven fabric, a porous plastic sheet, or the like. The raw material fiber which comprises the nonwoven fabric can use the same raw material fiber as the surface sheet 11. FIG.

  The three-dimensional gather 15 is a fixed portion fixed to the side in the width direction of the exterior sheet 14 and a main body extending from the fixed portion to the inner surface side of the surface sheet 11 beyond the side in the width direction such as the absorber 12. It is formed of The front and rear portions of the main body in the front and rear direction are fixed to the inner surface of the top sheet 11, and the middle portion in the front and rear direction of the main body is not fixed to the surface sheet 11 and is erected toward the inner surface. The three-dimensional gather 15 is formed of a double gather sheet 16 and an elongated gather elastic member 17 extending in the front-rear direction.

  The gather sheet 16 may be synthetic fibers such as olefins, polyesters, and polyamides such as polyethylene or polypropylene, regenerated fibers such as rayon and cupra, and natural fibers such as cotton. The spun bond method, thermal Although non-woven fabrics obtained by an appropriate processing method such as bonding method, melt-blowing method, needle-punching method can be used, in particular, non-woven fabrics excellent in air permeability by suppressing basis weight are used to prevent mure. Good. Further, the gather sheet 16 is a silicone type, paraffin metal type, alkylchromic chloride type water repellent agent, etc. in order to prevent the permeation of urine etc. and to prevent a rash and to improve the feel (dry feeling) to the skin. It is preferable to use a water repellent treated non-woven fabric coated with

  As the gather elastic member 17, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, polyester and the like which are usually used can be used. In order to make it difficult to see from the outside, it is preferable to set the thickness to 925 dtex or less, the elongation rate to 150 to 350%, and the interval to 10.0 mm or less.

  As shown in FIG. 6, as the gather elastic member 17, the solid gathers 15 are erected toward the inner surface by the stretching force thereof, and it is also possible to use a tape-like one having a predetermined width other than a thread. Further, the elongation rate is calculated by the length at the time of elongation / the length of the natural length × 100 [%].

  As the locking member 18, a hook material of a mechanical fastener is preferable. The shape of the hook material is (A) L-shaped, (B) J-shaped, (C) mushroom-shaped, (D) T-shaped, (E) double J-shaped (J-shaped) Or the like), etc., but any shape may be used. Moreover, it can change to a hook material and can also use an adhesive layer.

  As shown in FIGS. 7 and 8, a plurality of first grooves 20 having a plurality of concave sectional shapes extending in the front-rear direction are formed on the inner surface of the absorber 12, and the outer surface of the absorber 12 is in the width direction A plurality of extending second grooves 25 having a concave shape in cross section are formed. As a result, the liquid such as urine that has moved from the top sheet 11 to the absorbent 12 can be rapidly diffused to the front and back portions of the absorbent 12 in the front-rear direction by the first grooves 20. It can be enhanced. Moreover, since the absorber 12 can be easily deformed toward the inner surface in the second groove 25 with low rigidity, the fit performance of the absorber 12 to the wearer can be enhanced. Furthermore, since the grooves extending in the width direction are not formed on the inner surface of the absorber 12, the liquid moved from the top sheet 11 to the absorber 12 leaks from the left and right end portions in the width direction of the absorber 12. Can be suppressed.

  On the inner surface of the absorbent body 12, a first groove 20 (referred to as a first groove 20A for convenience) extending to the front and rear end portions of the absorbent body 12 in the center in the width direction of the absorbent body 12; A first groove 20 (referred to as a first groove 20B for convenience) extending to the front and rear end of the absorber 12 at a predetermined interval in the width direction on the left side in the width direction of the first groove 20A A first groove 20 (referred to as a first groove 20C for convenience) extending to the front and rear ends of the absorber 12 with a predetermined interval in the width direction on the right side in the width direction of the first grooves 20A The first groove 20 (for convenience referred to as a first groove 20D) extends to the front and rear end portions of the absorber 12 at a predetermined distance in the width direction to the left side portion in the width direction of the first groove 20B. And the first end of the first groove 20A extending to the front and rear ends of the absorber 12 at a predetermined distance in the width direction from the right side in the width direction of the first groove 20A. Is formed of 20 (conveniently referred to as a first groove 20E). Further, the distance between the first groove 20A and the first groove 20B in the width direction is smaller than the distance between the first groove 20B and the first groove 20D in the width direction, and the width direction of the first groove 20A and the first groove 20C The distance between the first groove 20C and the first groove 20E is smaller than the distance between the first groove 20C and the first groove 20E. Thus, both side portions in the width direction of the absorber 12 can be more efficiently deformed toward the inner surface centering on the first groove 20A.

  FIGS. 7 and 8 illustrate the first groove 20 extending to the front and rear ends of the absorber 12 in the longitudinal direction, but the first groove 20 may be extended to the front and rear of the absorber 12. It does not extend to the end, but can extend from the vicinity of the front end in the front-rear direction of the absorber 12 to the vicinity of the rear end. Thereby, it can be suppressed that the liquid moved from the top sheet 11 to the absorber 12 leaks from the front and rear ends of the absorber 12 in the front-rear direction. 7 and 8 show a form in which the first groove 20 is formed extending to the front and rear ends of the absorber 12, but the first groove 20 may be a front portion of the absorber 12. It can also be branched into a plurality of parts at portions located in 12C and rear part 12E. As a result, the liquid moved from the top sheet 11 to the absorber 12 can be diffused more quickly to the front and rear portions of the absorber 12 by the first groove 20.

  Second grooves 25 are formed on the outer surface of the absorbent body 12 at predetermined intervals in the front-rear direction of the absorbent body 12 and extend to right and left end portions in the width direction of the absorbent body 12. Accordingly, the absorber 12 can be easily deformed toward the inner surface from the front end to the rear end in the front-rear direction.

  FIGS. 7 and 8 illustrate a mode in which the second groove 25 is formed at a predetermined distance in the front-rear direction of the absorber 12, but the second groove of the portion located in the narrow portion 12D of the absorber 12 is illustrated. It is also possible to make the distance in the front-rear direction of 25 smaller than the distance in the front-rear direction of the second groove 25 of the portion located in the front portion 12C or the rear portion 12E of the absorber 12. Thereby, the site | part located in narrow part 12D of the absorber 12 can be deformed toward an inner surface more easily.

  As shown in FIG. 9, the lower portion 21 located on the outermost surface side of the first groove 20 is located on the inner surface side of the upper portion 26 located on the inner surface side of the second groove 25. That is, in cross section, the lower portion 21 of the first groove 20 and the upper portion 26 of the second groove 25 are separated by a predetermined distance. In other words, the sum of the depth D1 of the first groove 20 and the depth D2 of the second groove 25 (for convenience referred to as the total depth T3) is formed smaller than the thickness T of the absorber 12 . Thereby, the liquid moving in the first groove 20 is prevented from moving directly to the second groove 25, and the liquid is prevented from leaking from the left and right ends in the width direction of the absorber 12. it can. The depth D1 of the first groove 20 is formed deeper than the depth D2 of the second groove 25. As a result, it is possible to ensure high diffusion performance of the liquid moved from the top sheet 11 to the absorber 12 to the front and rear ends of the absorber 12 in the front-rear direction.

  The first groove 20 and the second groove 25 are formed by embossing, but the amount of pulp fiber and the amount of superabsorbent polymer in the portion of the absorber 12 where the first groove 20 and the second groove 25 are formed are small. It can also be formed.

  When the first groove 20 and the second groove 25 are formed by embossing, the fiber density of the absorber 12 at a portion located on the outer surface side of the lower portion 21 of the first groove 20 is formed higher than other portions. The fiber density of the absorber 12 at a portion located on the inner surface side of the upper portion 26 of the second groove 25 is formed higher than other portions, and the first groove 20 and the second groove 25 intersect in a plan view The fiber density at the site where the Thereby, the thickness of the portion where the first groove 20 and the second groove 25 intersect is formed the thinnest, but the portion moving the liquid in the first groove 20 intersects the portion where the first groove 20 and the second groove 25 intersect. The movement into the second groove 25 can be efficiently suppressed via the

Pad of Second Embodiment
Next, the pad of the second embodiment will be described. The same members as those of the pad of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown to FIG. 10, 11, the absorber 12 of 2nd Embodiment is formed from the inner side absorber 12A located in a wearer's body surface side, and the outer side absorber 12B located in the opposite body surface side. . The inner absorbent body 12A is formed to have a higher content of the superabsorbent polymer than the outer absorbent body 12B. Thereby, the inner side absorber 12A can absorb a larger amount of liquid than the outer side absorber 12B.

  Specifically, a first groove 20 is formed on the inner surface of the inner absorber 12A from the inner surface of the inner absorber 12A to the inner surface of the outer absorber 12B, and a second groove is formed on the outer surface of the outer absorber 12B. 25 are formed.

  As shown in FIG. 12, the depth D1 of the first groove 20 is formed larger than the thickness T1 of the upper absorber 12A. Thereby, since the upper absorbent body 12A adjacent to the first groove 20 absorbs much of the liquid overflowing from the first groove 20, it is possible to suppress the reversion of the liquid. Although FIG. 12 shows a mode in which the depth D1 of the first groove 20 is larger than the thickness T1 of the upper absorber 12A, the depth D1 of the first groove 20 is equal to the thickness T1 of the upper absorber 12A. It can also be formed equal to

Pad of Third Embodiment
Next, the pad of the third embodiment will be described. The same members as those of the pad of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 13 and 14, the inner surface of the absorber 12 has a first groove 20 extending to the front and rear ends of the absorber 12 in the center of the absorber 12 in the width direction (for convenience) The first groove 20 extends in an arc shape to the front and rear end portions of the absorber 12 at a predetermined interval in the width direction on the left side in the width direction of the first groove 20A). (For convenience, it is referred to as the first groove 20B) and extends in a circular arc shape to the front and rear end portions of the absorber 12 at a predetermined interval in the width direction on the right side portion in the width direction of the first groove 20A. The first groove 20 (referred to as a first groove 20C for convenience), and an arc shape from the left side in the width direction of the first groove 20B to the front and rear ends of the absorber 12 at a predetermined interval in the width direction The first groove 20 (referred to as the first groove 20D for convenience) extends in the width direction to the right side portion of the first groove 20A in the width direction. It is formed from a first groove 20 extending in an arc shape to the front and rear ends of the longitudinal direction of the absorbent body 12 (conveniently referred to as a first groove 20E) Te. The first groove 20B and the first groove 20D are formed with the top of the arc portion on the right side of the front and rear end portions of the arc portion, and the first groove 20C and the first groove 20E have the top of the arc portion of the arc portion It is formed on the left side of the front and rear end portions. Further, the distance between the first groove 20A and the first groove 20B in the width direction is smaller than the distance between the first groove 20B and the first groove 20D in the width direction, and the width direction of the first groove 20A and the first groove 20C The distance between the first groove 20C and the first groove 20E is smaller than the distance between the first groove 20C and the first groove 20E. Thus, both side portions in the width direction of the absorber 12 can be more efficiently deformed toward the inner surface centering on the first groove 20A.

  The portion of the outer surface of the absorber 12 on the front side of the center in the front-rear direction of the narrow portion 12D extends to the left and right ends in the width direction of the absorber 12 at a predetermined interval in the front-rear direction of the absorber 12 An arc-shaped second groove 25 (referred to as a second groove 25A for convenience) is formed, and a predetermined distance in the front-rear direction of the absorber 12 is provided at a portion on the rear side of the center of the constricted portion 12D in the front-rear direction. An arc-shaped second groove 25 (referred to as a second groove 25B for convenience) extending to the left and right ends in the width direction of the absorber 12 is formed. In the second groove 25A, the top of the arc portion is formed on the rear side in the front-rear direction than the left and right portions of the arc portion, and in the second groove 25B, the top of the arc portion is front and rear than the left and right portions of the arc portion It is formed on the front side. Thereby, the absorber 12 can be more easily deformed toward the inner surface from the front end of the front body 12C to the rear end of the rear body 12E.

  The present invention is applicable to a pad attached to the inner surface of a disposable diaper.

11 surface sheet 12 absorbent body 12A inner absorbent body 12B outer absorbent body 12D constricted portion 20 first groove 21 lower portion 25 second groove 26 upper portion T1 thickness D1 depth

Claims (8)

A pad comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber provided between the top sheet and the back sheet,
A plurality of first grooves extending in the longitudinal direction at predetermined intervals in the width direction of the absorber are formed on the inner surface which is the body surface side of the absorber.
A plurality of second grooves extending in the width direction at predetermined intervals in the longitudinal direction of the absorber are formed on the outer surface opposite to the body side of the absorber.
A pad, wherein the lower portion of the first groove and the upper portion of the second groove are spaced apart from each other by a predetermined distance in a sectional view. The absorber is formed of an inner side absorber on the body side and an outer side absorber on the opposite side of the body,
Making the content of the absorbent polymer of the inner absorbent higher than the content of the absorbent polymer of the outer absorbent,
The pad according to claim 1, wherein the depth of the first groove is formed to be equal to or larger than the thickness of the inner absorber in a cross sectional view.   The pad according to claim 1 or 2, wherein an interval in the width direction of the first groove adjacent to the first groove is formed wider as it is provided from the central portion in the width direction of the absorber to the left and right.   The space | interval of the longitudinal direction of the 2nd groove adjacent to the said 2nd groove | channel was formed widely according to providing in the back and forth side from the central part of the longitudinal direction in the site | part corresponding to the narrow part of the said absorber. The pad described in item 1.   The said 1st groove | channel is extended and formed in the front side vicinity site | part of the rear end part of a longitudinal direction from the rear side vicinity site | part of the front end part of the longitudinal direction of the said absorber. Pad. The first groove provided on the left side of the widthwise central part of the absorber is formed to be curved to the left in the widthwise direction as it extends longitudinally from the top of the right side,
The first groove provided on the right of the central portion in the width direction of the absorber is formed to be curved to the right in the width direction as it extends in the longitudinal direction from the apex on the left side. The pad described in item 1. A second groove provided on the front side of the longitudinal central portion at a portion corresponding to the narrowed portion of the absorber is formed to be curved on the front side in the longitudinal direction as it extends in the width direction from the rear top ,
The second groove provided on the rear side of the central portion in the longitudinal direction at the portion corresponding to the narrow portion of the absorber is curved rearward on the longitudinal direction as it extends in the width direction from the top of the front side The pad according to any one of claims 1 to 6, which is formed.   The pad according to any one of claims 1 to 7, wherein the fiber density of the absorber of the portion where the first groove and the second groove intersect in a plan view is formed higher than that of the other portion.

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