JP5503867B2 - Absorbent article and manufacturing method thereof - Google Patents

Description

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

  In order to improve the adhesion with the body fluid excretion part of the wearer, for example, Patent Document 1 and Patent Document 2 include an inner compression groove and an outer compression groove extending in the longitudinal direction on each of the left and right sides of the central absorption part. Are provided with a space therebetween, and an absorbent article is disclosed in which an inner compressed groove and an outer compressed groove are each curved in a convex shape toward the longitudinal center line. Patent Literature 1 and Patent Literature 2 disclose an absorbent article having a central absorbent portion provided on both left and right sides with an elastic restoring portion having a curved line shape that is convex toward the longitudinal center line. Yes.

  However, all of the inner compression groove, the outer compression groove, and the elastic restoring portion described in Patent Document 1 and Patent Document 2 are formed to be curved in a convex shape toward the center line extending in the longitudinal direction. Therefore, when a compressive force toward the center line extending in the longitudinal direction is applied at the time of wearing, both side portions of the excretory part region that is in contact with the body fluid excretion part of the wearer are deformed in a direction toward the center line extending in the longitudinal direction. It is easy to cause a twist in the absorbent article, which may impair the fit of the excretory part region.

JP 2004-154153 A JP 2004-154154 A

  Therefore, the object of the present invention is that both sides of the excretory part region that abuts on the body fluid excretion part of the wearer extend in the longitudinal direction even when a compressive force toward the center line extending in the longitudinal direction is applied at the time of wearing. An object of the present invention is to provide an absorbent article that is not easily deformed in the direction toward the center line, that the absorbent article is less likely to be twisted, and that the fit of the excretory region 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. The absorbent body has constricted portions that are constricted inward on both side portions in the center in the longitudinal direction, and is in a position corresponding to the constricted portion, and is in contact with the body fluid excretion portion of the wearer. The absorbent article is provided with a plurality of compressed grooves that are convexly curved outward in the width direction on both sides of the top sheet and the absorber in the excretory region.

  In addition, the present invention is a preferred method for manufacturing an absorbent article in which the absorbent article of the present invention is manufactured through an absorbent body forming step when manufacturing the absorbent article of the present invention described above. The absorbent body forming step of forming the absorbent body having a constricted portion that is constricted inward on each side portion includes a plurality of compressed groove grooves that are convexly curved outward in the width direction. Using a plurality of embossing rolls provided with a convex portion for forming on the peripheral surface, a plurality of the continuous body of the absorbent body and a plurality of raw sheets of the topsheet arranged on one surface of the continuous body of the absorbent body By sequentially conveying to the embossing roll and embossing, a plurality of the compressed grooves are formed on both sides in the conveying direction of the continuous body of the absorbent body and the original sheet of the top sheet, and the continuous of the absorbent body Each side of the body conveyance direction Constriction let it is intended to provide a method of manufacturing an absorbent article to form the constricted portion.

  According to the absorbent article of the present invention, at the time of wearing, both sides of the excretory part region that is in contact with the body fluid excretion part of the wearer are unlikely to be deformed in the direction toward the center line extending in the longitudinal direction. The twist is less likely to occur and the fit of the excretion area is improved.

  Moreover, according to the manufacturing method of the absorbent article of this invention, the absorbent article of this invention can be manufactured easily.

  Hereinafter, preferable this embodiment of the sanitary napkin which is an absorbent article of this invention is described based on FIGS. 1-3.

  As shown in FIG. 1, the sanitary napkin 1 of the present embodiment is formed symmetrically with respect to a center line CL extending in the longitudinal direction of the sanitary napkin 1. 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 absorbent body 4 of the sanitary napkin 1 of this embodiment has a longitudinal side (hereinafter referred to as “Y direction”; Y direction: a direction parallel to the center line CL) and a side portion at the center. 4b has a constricted portion 43 constricted inwardly. As shown in FIG. 1, the sanitary napkin 1 of the present embodiment has a width on each of the top sheet 2 and the side parts 2 b and 4 b of the absorbent body 4 in the excretion part region A that is in contact with the body fluid excretion part of the wearer. A plurality of squeezed grooves 7 curved outwardly are formed in a direction (hereinafter referred to as “X direction”. X direction: a direction perpendicular to the center line CL).

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. Moreover, the side sheet | seat 5 is distribute | arranged to the side part 1b of the longitudinal direction (Y direction) of the skin contact surface side of the napkin 1 over the substantially full length of the longitudinal direction (Y direction). 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 has an excretory part region A that is in contact with the body fluid excretion part of the wearer, a front area B that extends forward of the excretion part area A, and a rear part 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 absorbent body 4 that is long in the same direction as the front-rear direction at the time of wearing, and is in the longitudinal direction (Y direction) of the absorbent body 4. It has the part extended outward from each of both ends 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 absorbent body 4 is composed of a liquid-retaining absorbent core 41 and a liquid-permeable core wrap sheet 42, and the skin of the absorbent core 41 by the single core wrap sheet 42. The contact surface side and the non-skin contact surface side are covered. As shown in FIG. 1, the absorber 4 has a constricted portion 43 that is constricted inwardly on a side portion 4 b in the center in the longitudinal direction (Y direction). The core wrap sheet 42 covers the entire skin contact surface side of the absorbent core 41 and further covers both side portions along the longitudinal direction (Y direction) of the absorbent core 41. It reaches the non-skin contact surface side and covers the entire non-skin contact surface side. The core wrap sheet 42 and the absorbent core 41 are joined at a predetermined portion by a joining means such as a hot melt adhesive. The constricted portion 43 of the absorbent body 4 is formed by confining not only the absorbent core 41 but also the core wrap sheet 42 inward. The core wrap sheet 42 is effective in preventing the absorbent polymer 41 from spilling out when the absorbent core 41 contains a particulate absorbent polymer.

  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 plurality of compressed grooves 7 formed by compacting the top sheet 2 and the absorbent body 4. The number of the compressed groove 7 is preferably 1 to 5 formed on the top sheet 2 and one side 2b, 4b of the absorbent body 4, and two are formed in the napkin 1 of the present embodiment. ing. The two pressing groove | channels 7 are comprised from the inner side groove | channel 71 and the outer side groove | channel 72 formed in the width direction (X direction) outer side of the inner side groove | channel 71, as shown in FIG. 1, FIG. Furthermore, the pressing groove 7 in 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.

  The inner groove 71 of the compressed groove 7 is formed at a position corresponding to the constricted portion 43 where the absorber 4 is recessed in the width direction (X direction), that is, a position where the constricted portion 43 exists. The constricted part 43 of the absorber 4 is arranged in the excretory part region A, and the excretory part region is arranged at the time of wearing by aligning the longitudinal direction (Y direction) positions of the bottom 43a of the constricted part 43 and the top part 71a of the inner groove 71. When A is raised, it is preferable in that it is less likely to be twisted. Specifically, as shown in FIG. 1, the surface sheet 2 in the excretion part region A and the side parts 2b and 4b of the absorbent body 4 are formed in a shape that curves in a convex shape outward in the width direction (X direction). Has been. In the napkin 1, as shown in FIG. 1, a front groove 73, an inner groove 71, and a rear groove 74 are connected to form an annular circumferential groove. As described above, the inner groove 71 in the annular circumferential groove is a portion formed in the excretory region A, and the portion 71b closest to the center line CL in the portion near the front region B and the rear region C It means a section between the portion 71c closest to the center line CL in the close portion.

  The outer groove 72 of the compressed groove 7 is formed at a position corresponding to the constricted portion 43 where the absorbent body 4 is recessed in the width direction (X direction), that is, a position where the constricted portion 43 exists. The narrow portion 43 of the absorbent body 4 is disposed in the excretion portion region A, and the excretion portion region is aligned at the time of wearing by aligning the longitudinal direction (Y direction) positions of the bottom portion 43a of the narrow portion 43 and the top portion 72a of the outer groove 72. When A is raised, it is preferable in that it is less likely to be twisted. Specifically, as shown in FIG. 1, the top sheet 2 and the absorber 4 on the outer side in the width direction (X direction) of the inner groove 71 are formed in a shape that curves convexly outward in the width direction (X direction). Has been. 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.

  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 the portion closer to 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 ˜100 mm, and more preferably 25 mm to 50 mm.

  In the napkin 1, the interval W1 between the outer groove 72 and the constricted portion 43 of the absorber 4 is formed such that the interval W1 between the top portion 72a of the outer groove 72 and the bottom portion 43a of the constricted portion 43 is the narrowest. ing. The interval W1 between the top portion 72a of the outer groove 72 and the bottom portion 43a of the constricted portion 43 is formed narrower than the interval W2 between the top portion 71a of the inner groove 71 and the top portion 72a of the outer groove 72 as shown in FIG. . 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 interval W2 between the top 71a of the inner groove 71 and the top 72a of the outer groove 72 is formed to be the narrowest.

  The length of the napkin 1 in the width direction (X direction) is preferably 40 mm to 200 mm. The length of the absorbent body 4 in the width direction (X direction) is preferably 50 mm to 90 mm at the widest portion, and the narrow portion 43 formed on one side 1 b of the napkin 1 and the other side 1 b It is preferable that the space | interval of the bottom parts 43a of the formed narrow part 43 is 40 mm-80 mm. The interval W1 between the top portion 72a of the outer groove 72 and the bottom portion 43a of the constricted portion 43 is preferably 1 mm to 10 mm, and more preferably 2 mm to 6 mm. The distance W2 between the top 71a of the inner groove 71 and the top 72a of the outer groove 72 is preferably 3 mm to 12 mm, and more preferably 4 mm to 12 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, 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 formed in the top sheet 2 and the absorber 4 in the front region B so as to be curved in a convex shape outward in the width direction (X direction). Yes. Moreover, in the napkin 1, as shown in FIG. 1, the front connection groove part 732 is formed in the surface sheet 2 and the absorber 4 in the front area | region B in the shape curved in convex shape outward in a longitudinal direction (Y direction). Has been.

  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 741 is formed on the top sheet 2 and the absorber 4 in the rear region C so as to be curved outwardly in the width direction (X direction). Yes. Moreover, in the napkin 1, as shown in FIG. 1, the back connection groove part 742 is formed in the surface sheet 2 and the absorber 4 in the back area | region C in the shape curved in convex shape outward in a longitudinal direction (Y direction). Has been.

  The length of the front longitudinal groove portion 731 in the longitudinal direction (Y direction) 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 732 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 interval 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 interval 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 part 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 portion 742 (the distance between the top of the rear connection portion 742 and the outer end portion 741c of the rear vertical groove portion 741) is 10 mm to 100 mm. Preferably, it is 15-30 mm.

  In the compressed groove 7, the deeply formed portions and the portions formed slightly shallower are alternately arranged to form a continuous line. It is preferable that 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 0.5 mm to 5 mm.

  In the napkin 1, as shown in FIG. 1, each of the two folding lines 8 b and 8 c formed when individually packaged is formed to extend 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 side edges 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.

  As the absorbent core 41 and the core wrap sheet 42 of the absorbent body 4, any absorbent core such as a sanitary napkin can be used without particular limitation. For example, as the absorbent core 41, a fiber aggregate of fiber materials such as pulp or a material in which a superabsorbent polymer is supported can be used, and the core wrap sheet 42 can be a tissue paper or a water permeable sheet. A nonwoven fabric or the like 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 of the present embodiment includes an absorbent body 4 including a pair of constricted portions 43 that are constricted inwardly on both side portions 4 b in the center in the longitudinal direction (Y direction). A plurality of curved portions that are convex in the width direction (X direction) outward at the positions corresponding to the constricted portion 43 of the top sheet 2 and the side portions 2b, 4b of the absorbent body 4 in the excretory region A. Squeezed groove 7 (inner groove 71 and outer groove 72). Thus, since the absorber 4 includes the constricted portion 43 that is constricted inward, it is easy to follow the shape of the crotch portion of the underwear, and the inner groove 71 and the outer groove 72 are both in the width direction (X Direction) Since it is curved outwardly, even if a compressive force directed toward the center line CL is applied at the time of wearing, both side portions 1b of the excretory region A of the napkin 1 are directed in the direction toward the center line CL. Difficult to deform. Therefore, it is difficult for the napkin 1 to be twisted, and the fit of the excretion region A is improved.

  Further, as shown in FIG. 1, the napkin 1 of the present embodiment is such 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 the length of the outer groove 72. It is arranged within the range. For this reason, even when a compressive force directed toward the center line CL is applied, the convex top portion 71a of the inner groove 71 always acts via the outer groove 72. Therefore, the compressive force toward the center line CL is unlikely to act on the region between the pair of inner grooves 71, 71, and the napkin 1 is less likely to be twisted, thereby improving the fit of the excretory region A.

  In the napkin 1 of the present embodiment, as shown in FIG. 1, the distance between the outer groove 72 and the constricted portion 43 of the absorber 4 is the distance W1 between the top portion 72 a of the outer groove 72 and the bottom portion 43 a of the constricted portion 43. Is the narrowest. Therefore, the deflection of the absorbent body 4 between the outer groove 72 and the side portion 4b of the absorbent body 4 hardly occurs. In the napkin 1 of the present embodiment, as shown in FIG. 1, the interval W <b> 1 is narrower than the interval W <b> 2 between the top portion 71 a of the inner groove 71 and the top portion 72 a of the outer groove 72. Therefore, the part of the interval W1 has a structure that is less likely to be twisted than the part of the interval W2.

  Further, in the napkin 1 of the present embodiment, as shown in FIG. 1, both end portions 72 b and 72 c of the outer groove 72 are both arranged within a range of 3 mm from the straight line SL in contact with the top portion 71 a of the inner groove 71. Both extend inward from the straight line SL. Therefore, the inner groove 71 and the outer groove 72 are connected in the width direction (X direction) even if the portion of the interval W2 is deformed with respect to the compressive force acting from both sides of the napkin 1 toward the center line CL direction. By being formed, the entire continuous portion must be movable, and both end portions 72b and 72c in the longitudinal direction (Y direction) of the outer groove 72 interfere with the top portion 71a of the inner groove 71, thereby deforming (displacing). Suppress. Similarly, in the inner portion of the inner groove 71, deformation is easily suppressed in the section connecting both end portions 71b and 71c in the longitudinal direction of the inner groove 71.

  Moreover, as shown in FIG. 1, the napkin 1 of this embodiment forms the cyclic | annular form by connecting the front groove | channel 73, the inner side groove | channel 71, and the back groove | channel 74, as shown in FIG. 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 the present embodiment can further prevent deformation of the topsheet 2 and the absorber 4 in the region surrounded by the annular groove formed by the front groove 73, the inner groove 71, and the rear groove 74. In this way, twisting is unlikely to occur, 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 separated from the outer groove 72 and the front groove 73 and the outer groove 72 and the rear groove 74 even when the compressive force acting toward the center line CL is applied. The portion that has acted as a cushion can further prevent deformation of the surface sheet 2 and the absorber 4 in the region surrounded by the annular groove formed by the front groove 73, the inner groove 71 and the rear groove 74, It is difficult for the twist to occur and the fit of the absorbent body is improved.

  Further, as shown in FIG. 1, the napkin 1 according to the present embodiment has folding lines 8 b and 8 c that extend in the width direction (X direction) and are more than both end portions 72 b and 72 c of the outer groove 72. It is formed outward in the longitudinal direction (Y direction). 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 this invention is not restrict | limited to the napkin 1 of this embodiment mentioned above at all, and can be changed suitably.

  For example, the napkin 1 of the above-described embodiment 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. 3A, only the portion 71b of the inner groove 71 is arranged outward in the longitudinal direction (Y direction) from the end 72b of the outer groove 72, as shown in FIG. 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.

  Further, in the napkin 1 of the above-described embodiment, as shown in FIG. 1, the distance between the both ends 72b and 72c of the outer groove 72 and the straight line SL in contact with the top 71a of the inner groove 71 is within 3 mm. However, as shown in FIG. 4B, either one of both end portions 72b and 72c of the outer groove 72 is arranged so that the distance from the straight line SL is 3 mm or less. Just do it.

  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 substantially 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 the above-mentioned embodiment, as shown in FIG. 1, a pair of side sheets 5 and 5 are arranged on both sides in the longitudinal direction (Y direction). 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 this embodiment mentioned above, as shown in FIG. 1, although the folding lines 8b and 8c are arranged, it does not need to be arranged.

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

  Next, the manufacturing method of the absorbent article of the present invention will be described with reference to FIGS. 4 and 5 by taking the case of manufacturing the napkin 1 of the present embodiment shown in FIGS. Will be described with reference to FIG.

  In the manufacturing method of the present embodiment, when the napkin 1 is manufactured, the absorbent body 4 of the napkin 1 is manufactured through the absorbent body forming step 400. The absorbent body forming step of forming the absorbent body 4 having a pair of constricted portions 43 that are constricted inward on both side portions 4a and 4a in the center in the longitudinal direction (Y direction) is convex outward in the width direction (method X). A plurality of embossing rolls provided with a squeezing groove forming convex part for forming a plurality of squeezing groove 7 curved in a shape on the peripheral surface, and a continuous body 40 of the absorbent body 4 and a continuous body of the absorbent body 4 The conveying direction of the continuum 40 of the absorbent body 4 and the original fabric 20 of the topsheet 2 by sequentially conveying and embossing the original fabric 20 of the topsheet 2 arranged on one surface to a plurality of embossing rolls. (Because it is a direction corresponding to the longitudinal direction of the napkin 1, it is hereinafter referred to as “Y direction”.) A plurality of squeezed grooves 7 are formed on both sides, and the conveying direction of the continuous body 40 of the absorbent body 4 (Y Direction) Form the constricted part 43 by constricting both sides inward. To.

  The number of pressing groove 7 and the number of embossing rolls correspond and are the same number. Since the plurality of compressed strip grooves 7 of the napkin 1 are composed of two pairs of a pair of inner grooves 71 and a pair of outer grooves 72, the absorbent body forming step 400 is performed using two embossing rolls. Specifically, as shown in FIGS. 4 and 5, a first embossing roll 170 having inner groove forming convex portions 17 forming a pair of inner grooves 71 on the peripheral surface, and a pair of outer grooves 72. This is performed by using a second embossing roll 270 provided with a convex portion 27 for forming an outer groove on the peripheral surface. The compressed groove 7 further includes a front groove 73 and a rear groove 74, and the front groove 73, the inner groove 71, and the rear groove 74 are connected to form an annular groove. Therefore, the inner groove forming convex portion 17 has a shape that forms an annular groove in which the front groove 73, the inner groove 71, and the rear groove 74 are connected.

  The compressed groove 7 of the napkin 1 includes an inner groove 71 and an outer groove 72 formed on the outer side in the width direction (X direction) of the inner groove 71. In the formation of the plurality of compressed grooves 7, after forming the inner compressed grooves 7, the outer compressed grooves 7 are formed on the side in the transport direction (Y direction) of the continuous body 40 of the absorbent body 4. 4 and 5, the first embossing roll 170 that forms the inner groove 71 is disposed ahead of the second embossing roll 270 that forms the outer groove 72. The first embossing roll 170 and the second embossing roll 270 are arranged on the side on which the topsheet 2 is provided, as shown in FIGS.

  As shown in FIGS. 4 and 5, the absorbent body forming process 400 embosses using the first embossing roll 170 and its receiving roll 171, and further embossing using the second embossing roll 270 and its receiving roll 271. To do. As shown in FIGS. 4 and 5, the receiving roll 171 is disposed to face the first embossing roll 170 at a predetermined distance, and is a compression receiving roll when embossing. Since the receiving roll 171 functions as a receiving roll for the first embossing roll 170, the receiving roll 171 is a flat roll having no irregularities on the roll surface. The same applies to the receiving roll 271 of the second embossing roll 270.

  The continuous body 40 of the absorbent body 4 to be conveyed is formed by arranging a plurality of rectangular absorbent cores 41 in a line at a predetermined interval and wrapping with a raw fabric 420 of the core wrap sheet 42. As shown in FIG. 4, the raw sheet 20 of the topsheet 2 is continuously conveyed by the guide roller 401 on the upper surface of the continuous body 40 of the absorber 4.

  As shown in FIGS. 4 and 5, the absorbent body forming step 400 first forms a continuous body 40 of the absorbent body 4 and an original fabric 20 of the topsheet 2 disposed on one surface of the continuous body 40 of the absorbent body 4. 1 side of embossing roll 170 and its receiving roll 171, and embossing with 1st embossing roll 170 and receiving roll 171, one surface of raw material 20 of continuum 40 of absorbent body 4 and topsheet 2 A pair of inner grooves 71, 71 are formed on the upper side, and both sides of the conveyance body (Y direction) of the continuous body 40 of the absorber 4 are constricted inward. Next, the continuous body 40 of the absorbent body 4 having a pair of inner grooves 71 and 71 formed on one surface and the original fabric 20 of the topsheet 2 are conveyed between the second embossing roll 270 and the receiving roll 271, 2 By embossing with the embossing roll 270 and the receiving roll 271, a pair of outer grooves 72, 72 are formed on one surface of the continuous body 40 of the absorbent body 4 and the raw fabric 20 of the topsheet 2, and the absorbent body 4 The constricted portions 43 and 43 are formed by constricting both sides of the continuous body 40 in the conveying direction (Y direction) inward.

  After the absorbent body 4 is formed, as shown in FIG. 4, the raw sheet 30 of the back sheet 3 is continuously conveyed by the guide roller 402 to the lower surface of the continuous body 40 of the absorbent body 4, and the top sheet 2 The original fabric 20 and the original fabric 30 of the back sheet 3 are continuously bonded and fixed by adhesive means such as hot melt at both sides in the conveying direction (Y direction). Thereafter, the napkin 1 is manufactured by being sent to the next process and trimmed into a predetermined shape.

  In the napkin 1 manufactured through the absorbent body formation process 400, the density of the constricted portions 43 and 43 of the absorbent body 4 is substantially the same as the density of the absorbent body 4 other than the constricted portion 43. If the density of the side parts 4b, 4b of the absorbent body 4 is higher than the density of the other absorbent bodies 4, side leakage of body fluid is likely to occur due to capillary action, but the napkin 1 manufactured through the absorbent body formation process 400 Since the density of the constricted portions 43 and 43 of the absorbent body 4 is substantially the same as the density of the other absorbent bodies 4, it is difficult to cause capillary action, and side leakage of body fluid can be prevented. Such a napkin can be easily produced by the production method of the present invention.

  The manufacturing method of the absorbent article of this invention is not restrict | limited to the above-mentioned embodiment at all, and can be changed suitably.

  For example, in the above-described embodiment, as shown in FIGS. 4 and 5, the first embossing roll 170 that forms the inner groove 71 is disposed before the second embossing roll 270 that forms the outer groove 72. However, the second embossing roll 270 that forms the outer groove 72 may be arranged first.

  Further, in the above-described embodiment, the continuous body 40 of the absorbent body 4 to be conveyed is arranged in a row with a plurality of rectangular absorbent cores 41 at a predetermined interval, and is wrapped with the raw material of the core wrap sheet 42. However, it is also possible to use an absorbent core 41 in which both side portions are inwardly bound.

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. 3A to FIG. 3C 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. FIG. 4 is a schematic configuration diagram illustrating a manufacturing process of the method for manufacturing an absorbent article according to the present invention. FIG. 5 is a perspective view showing an absorbent body forming step of the manufacturing process shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sanitary napkin 1b Side part 2 of a longitudinal direction (Y direction) Top sheet 2b Side part of a longitudinal direction (Y direction) 20 Raw material of a surface sheet 3 Back surface sheet 30 Raw material of a back sheet 4 Absorber 4a Longitudinal direction (Y 4b) Longitudinal (Y direction) side 40 Absorbent continuum 41 Absorbent core 42 Core wrap sheet 420 Core wrap sheet raw material 43 Constricted part 43a Bottom part 5 Side sheet 6 Side flap part 61 Wing Part 7 Squeeze groove 71 Inner groove 71a Top part 71b, 71c End part in the longitudinal direction 72 Outer part groove 72a Top part 72b, 72c End part in the longitudinal direction 73 Front groove 731 Front longitudinal groove part 731b Outer end part 732 Front connection part 74 Rear groove 741 Rear vertical groove portion 741b Outer end portion 742 Rear connection portions 8b and 8c Folding curve 400 Absorber forming step 17 Convex shape for inner groove formation Portion 170 First Embossing Roll, 171 Receiving Roll 27 Outer Groove Forming Convex Portion 270 Second Embossing Roll, 271 Receiving Roll 401, 402 Guide Roller

Claims (1)

Comprising a liquid permeable topsheet to the skin contact surface side, and the back sheet in the non-skin contact surface side, an absorbent body disposed between these sheets, the absorbent body, both sides of the longitudinal center Each has a constricted portion that is constricted inwardly, and is located at a position corresponding to the constricted portion, and each of the both sides of the topsheet and the absorber in the excretion region that contacts the body fluid excretion portion of the wearer In addition, a plurality of squeezing grooves that are convexly curved outward in the width direction are formed, and the plurality of squeezing grooves are an inner groove and an outer groove formed on the outer side in the width direction of the inner groove. When manufacturing a substantially longitudinal absorbent article in which the longitudinal positions of the bottom of the constricted portion and the top of the outer groove are aligned , the absorbent body of the absorbent article Is a method for manufacturing an absorbent article manufactured through an absorbent body forming step,
The absorbent body forming step of forming the absorbent body having a constricted portion that is constricted inward on each of both side portions in the center in the longitudinal direction forms a plurality of compressed grooves that are convexly curved outward in the width direction. A plurality of embossing rolls provided with a convex portion for forming compressed groove on the peripheral surface, a continuous body of the absorbent body, and an original fabric of the topsheet arranged on one surface of the continuous body of the absorbent body Are sequentially conveyed to a plurality of the embossing rolls and embossed to form a plurality of the compressed groove grooves on each of both sides of the continuous body of the absorbent body and the raw sheet in the conveying direction, Conveying the continuous body of the absorbent body by forming a plurality of compressed grooves that are convexly curved outward in the width direction by consolidating the raw fabric of the topsheet and the continuous body of the absorbent body in the thickness direction Each side of the direction Method of manufacturing an absorbent article to form a part.

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