JP2018121863A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which has good fitness and is appropriately worn without corner parts of an absorbent core being twisted or bent.SOLUTION: An absorbent article (1) provided with an absorbent core (12) includes an adhesive area (21) on a non-skin side surface. Both end parts outside in a longitudinal direction of an end of the adhesive area (21) at least on one side in the longitudinal direction and at both end parts in a width direction are provided with a first recess (41) and a second recess (42) where the absorbent core (12) is recessed in a thickness direction. In the first recess (41) and the second recess (42), density of the absorbent core (12) is higher than in the adjacent area, and the first recess (41) and the second recess (42) are separate in the width direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an absorbent article.

  An example of the absorbent article is a sanitary napkin. In Patent Document 1, an absorbent core (absorber) is provided between a top sheet and a back sheet, and an absorbent article in which a pressing portion is formed by pressing the top sheet and the absorbent core in the thickness direction by embossing. Is disclosed.

JP 2006-123612 A

In the absorbent article of patent document 1, the pressing part extended continuously in the width direction is formed in the both ends of a longitudinal direction. For this reason, both end portions in the longitudinal direction of the absorbent article are easily fixed in a flat shape, and are difficult to bend along the wearer's lower abdomen and buttocks, resulting in poor fit.
Moreover, in the absorbent article of patent document 1, the adhesion area | region for affixing on an undergarment is formed over the whole area of the longitudinal direction of an absorbent core. However, the length of the adhesive region may be shorter than the absorbent core for reasons such as cost reduction. In that case, when pulling up the underwear, the corners of the absorbent core on the outer side in the longitudinal direction from the adhesive region are likely to fall down and bend, and the corners of the absorbent core may be worn and folded. There is.
The present invention has been made in view of the above-described problems, and provides an absorbent article that has good fit and is easy to be appropriately attached without the corners of the absorbent core being twisted or broken. With the goal.

The main invention for achieving the above object is an absorbent article having a longitudinal direction, a width direction, and a thickness direction, and having an absorbent core, wherein a non-skin side surface is provided with an adhesive region, A first recess and a second recess in which the absorbent core is recessed in the thickness direction are provided on the outer side in the longitudinal direction and at both ends in the width direction with respect to the end of the adhesive region on at least one side in the longitudinal direction. In the first recess and the second recess, the density of the absorbent core is higher than in the adjacent region, and the first recess and the second recess are separated in the width direction. The absorbent article characterized by the above.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to provide an absorbent article that has a good fit and is easily mounted appropriately without the corners of the absorbent core being swung or broken.

It is the top view which looked at the sanitary napkin 1 from the skin side. It is the top view which looked at the napkin 1 from the non-skin side. 3A is a schematic cross-sectional view of the napkin 1 along the line AA in FIG. 1, and FIG. 3B is a schematic cross-sectional view of the napkin 1 for explaining the point-like compressed portion 6 and the linear compressed portion 40. 1 is a plan view of a napkin 1 for explaining an absorbent body 10. It is a figure explaining the linear pressing part 40 provided in front side area | region R1. It is a figure explaining the linear pressing part 40 provided in back side area | region R3.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An absorbent article having a longitudinal direction, a width direction, and a thickness direction, and having an absorbent core, wherein an adhesive region is provided on a non-skin side surface, and the adhesive region on at least one side in the longitudinal direction A first recess and a second recess in which the absorbent core is recessed in the thickness direction are provided outside the end in the longitudinal direction and at both ends in the width direction, and the first recess and the In the second recess, the absorbent article is characterized in that the density of the absorbent core is higher than that in the adjacent region, and the first recess and the second recess are separated in the width direction.

  According to such an absorbent article, the rigidity of the corner part of an absorptive core increases by the 1st crevice and the 2nd crevice. Therefore, when pulling up the undergarment, the corners of the absorbent core that is not fixed to the undergarment are unlikely to fall down and bend easily. Therefore, it is easy to mount the absorbent article appropriately without the corner of the absorbent core being twisted or broken. Moreover, since the 1st recessed part and the 2nd recessed part are spaced apart in the width direction, the edge part area | region of the absorbent article in a longitudinal direction is hard to be fixed to planar shape. Therefore, the end region easily curves along the wearer's lower abdomen and buttocks and has good fit.

  Such an absorbent article is characterized in that the first recess and the second recess are provided outside the end of the adhesive region in the width direction.

  According to such an absorbent article, it is possible to increase the rigidity of the corners of the absorbent core that easily collapses and breaks when the underwear is pulled up.

  This absorbent article is characterized in that a low basis weight region in which the basis weight of the absorbent core is lower than the adjacent region is provided between the first recess and the second recess. It is an absorbent article.

  According to such an absorbent article, the end region of the absorbent article in the longitudinal direction is easy to bend along the wearer's lower abdomen and buttocks and has good fit.

  In such an absorbent article, a pair of the low basis weight regions are provided between the first recess and the second recess, the outer side of the end of the adhesive region in the longitudinal direction, and a pair A third concave portion in which the absorbent core is recessed in the thickness direction is provided between the low basis weight regions, and the density of the absorbent core is higher in the third concave portion than in an adjacent region. This is an absorbent article.

  According to such an absorbent article, the rigidity between the pair of low basis weight regions is increased by the third recesses, and it is difficult to fall down and bend easily when the underwear is pulled up. Therefore, the absorbent article is easily attached appropriately without the absorbent core being swung or broken.

  Such an absorbent article is characterized in that the adhesive region is provided on both sides in the width direction of the low basis weight region.

  According to such an absorbent article, the base part of the area of the absorbent core partitioned by the low basis weight area is fixed to the underwear, and the first recess and the second are located on the outer side in the longitudinal direction from the adhesive area. Since the concave portion is provided, the absorbent core is easily attached without being twisted or broken.

  In such an absorbent article, the first recess and the second recess are linear recesses, and a part of each of the first recess and the second recess overlaps the adhesive region in plan view. It is an absorbent article characterized by being.

  According to such an absorbent article, the first concave portion and the second concave portion increase the rigidity of the corners of the absorbent core continuously from the portion fixed to the undergarment. Therefore, it is easy to mount the absorbent article without the corners of the absorbent core being twisted or broken.

  Such an absorbent article is characterized in that one end and the other end of each of the first recess and the second recess overlap the adhesive region in plan view.

  According to such an absorbent article, the rigidity of the corner part of an absorptive core increases continuously from two places fixed to underwear by the 1st crevice and the 2nd crevice. Therefore, it is easy to mount the absorbent article without the corners of the absorbent core being twisted or broken.

  This absorbent article is an absorbent article characterized in that the concave portion is a linear concave portion and has a folded portion that is folded from the outside in the longitudinal direction toward the center.

  According to such an absorbent article, the area | region in which the 1st recessed part and the 2nd recessed part were provided becomes large, and the rigidity of the corner part of an absorbent core increases. The folded portion has a component in the longitudinal direction and a component in the width direction, and the region surrounded by the folded portion can easily maintain a planar shape. Therefore, it is easy to mount the absorbent article appropriately without the corner of the absorbent core being twisted or broken.

  In such an absorbent article, the portion of the absorbent core that overlaps the first concave portion and the second concave portion in the longitudinal direction has an uneven shape, and has a predetermined number of protrusions, Said 1st recessed part and said 2nd recessed part are linear recessed parts along the outline of the said absorptive core, It is the absorbent article characterized by having the said predetermined number of protrusion parts.

  According to such an absorbent article, since the first concave portion and the second concave portion are along the outline of the absorbent core, an impression that is comfortable to wear due to bulging inside the first concave portion and the second concave portion, An impression with a feeling can be given to the user. In addition, when the absorbent core is deformed according to the movement of the wearer by forming the contour of the absorbent core, the occurrence of wrinkles can be made constant starting from the valley between the protrusions, The generation of disordered wrinkles can be suppressed.

  In this absorbent article, the first concave portion and the second concave portion are provided on both sides in the longitudinal direction, respectively, and the first concave portion and the second concave portion on the front side in the longitudinal direction are in the longitudinal direction. The absorbent article is characterized by being separated from the first concave portion and the second concave portion on the rear side in the longitudinal direction.

  According to such an absorbent article, the absorbent article can be appropriately attached without causing the four corners of the absorbent core to bend or bend. In addition, the rising of the side portion in the width direction in the central region in the longitudinal direction of the absorbent article is prevented from being transmitted to the end region in the longitudinal direction, and the end region is along the lower abdomen and buttocks of the wearer. It is easy to bend and has good fit.

  This absorbent article is provided with a pair of wing portions extending in the width direction, and the absorbent article is disposed outside the wing portion in the longitudinal direction and at both end portions in the width direction of the absorbent core. The absorbent article is characterized in that a pair of second low basis weight regions are provided in which the basis weight of the adhesive core is lower than that of the adjacent region.

  According to such an absorbent article, the rising of the side part in the width direction in the central region in the longitudinal direction of the absorbent article is prevented from being transmitted to the end region in the longitudinal direction, and the end region is worn. It is easy to curve along the lower abdomen and buttocks of a person and has good fit.

  Hereinafter, as an absorbent article of the present invention, an embodiment will be described taking a sanitary napkin as an example. However, the present invention is not limited to this, and the present invention can also be applied to other absorbent articles such as a cage sheet and a urine collecting pad.

=== Basic Structure of Sanitary Napkin 1 ===
FIG. 1 is a plan view of a sanitary napkin 1 (hereinafter referred to as “napkin”) as viewed from the skin side. FIG. 2 is a plan view of the napkin 1 viewed from the non-skin side. 3A is a schematic cross-sectional view of the napkin 1 taken along the line AA in FIG. FIG. 3B is a schematic cross-sectional view of the napkin 1 for explaining the point-like pressing unit 6 and the linear pressing unit 40.

  The napkin 1 has a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other. In the longitudinal direction, the side in contact with the wearer's lower abdomen is referred to as the front side, and the side in contact with the wearer's buttocks is referred to as the rear side. In the thickness direction, the side in contact with the wearer is referred to as the skin side, and the opposite side is referred to as the non-skin side.

  As shown in FIG. 3A, in the napkin 1, a pair of side sheets 2, a top sheet 3, a second sheet 4, an absorber 10, and a back sheet 5 are laminated in order from the skin side in the thickness direction. . Each of these members 2 to 5 and 10 is joined to a member adjacent in the thickness direction with an adhesive (not shown). Note that the top sheet 3 and the second sheet 4 are liquid-permeable sheets, and examples thereof include an air-through nonwoven fabric. The back sheet 5 is a liquid-impermeable sheet, and examples thereof include a polyethylene (PE) resin film. The top sheet 3 and the back sheet 5 have a larger planar size than the absorbent body 10 and cover the entire planar surface of the absorbent body 10.

  The napkin 1 includes a napkin main body portion 20 provided with the absorbent body 10 and a pair of wing portions 30 extending from the longitudinal center region of the napkin main body portion 20 to both outer sides in the width direction. The wing part 30 is formed by the side sheet 2 and the back sheet 5 that extend outward from both sides in the width direction of the top sheet 3. Note that the napkin 1 may not have the wing portion 30.

  In the napkin 1, a region on the front side in the longitudinal direction from the wing portion 30 is referred to as a front region R1, a region in which the wing portion 30 is provided is referred to as a central region R2, and a region on the rear side in the longitudinal direction from the wing portion 30 is referred to as a region. This is referred to as a rear region R3. The napkin 1 is folded in three with a front folded portion Ff located in the front region R1 and a rear folded portion Fb located in the rear region R3 and individually wrapped.

  On the non-skin side surface of the napkin body 20 (non-skin side surface of the back sheet 5), an adhesive region 21 to which an adhesive is applied is provided. When the napkin 1 is used, the adhesive region 21 is affixed to the side of the skin such as underwear, whereby the napkin 1 is fixed to the underwear or the like. In FIG. 2, three rectangular adhesive regions 21 having long sides in the longitudinal direction are arranged at intervals in the longitudinal direction, and eight rows of the three adhesive regions 21 are spaced apart in the width direction. However, the shape and number of the adhesive regions 21 are not limited to this.

  Similarly, a wing portion adhesive region 31 is provided on the non-skin side surface of each wing portion 30 (non-skin side surface of the back sheet 5). When the napkin 1 is used, the wing portion adhesive region 31 is affixed to a non-skin side surface such as underwear, whereby the napkin 1 is fixed to the underwear or the like. In FIG. 2, the two rectangular wing-part adhesive regions 31 having long sides in the longitudinal direction are arranged in the width direction, but the shape and number of the wing-part adhesive regions 31 are not limited thereto.

  The absorbent body 10 is a member that absorbs excrement and holds it inside. As shown in FIG. 3A, the absorbent core 12, the skin side sheet 11 on the skin side of the absorbent core 12, and the absorbent core. The non-skin side sheet 13 is provided on the non-skin side with respect to 12.

  The absorbent core 12 is formed into a predetermined shape by adding a high-absorbent polymer (so-called SAP), which is a liquid-absorbing granular material, to pulp fibers, cellulose-based absorbent fibers, etc., which are liquid-absorbing fibers. Is. The skin side sheet 11 is a liquid-permeable sheet, and can be exemplified by tissue paper and the like. The non-skin side sheet 13 may be a liquid permeable sheet or a liquid impermeable sheet, and examples thereof include tissue paper. The absorbent core 12, the skin side sheet 11, and the non-skin side sheet 13 have substantially the same planar shape, and are adhesive (not shown) so as to cover the absorbent core 12 from the skin surface side and the non-skin surface side, respectively. Are joined by.

  Although not shown in the drawing, the absorbent body 10 is provided with a plurality of absorbent body squeezed portions 14 uniformly over the entire plane. As shown in FIG. 3B, the absorbent body 10 is squeezed (embossed) in the thickness direction and recessed in the thickness direction, and the density of the absorbent core 12 as compared to the adjacent region is as shown in FIG. Is high. The absorber squeezed compressed portion 14 increases the rigidity of the absorber 10, and excrement and the like are easily diffused in the longitudinal direction.

  As shown in FIG. 1, a plurality of point-like pressing parts 6 and a plurality of linear pressing parts 40 are provided on the skin side surface of the napkin 1. In the point-like pressing part 6 and the linear pressing part 40, as shown to FIG. 3B, the top sheet 3, the 2nd sheet | seat 4, and the absorber 10 are squeezed and dented from the skin side of the thickness direction, and are adjacent. The density of the absorbent core 12 is higher than that in the region.

  The plurality of linear pressing portions 40 are provided along the outline of the absorbent core 12. The plurality of point-like compressed parts 6 are provided in a zigzag manner with a relatively large interval between a pair of linear compressed parts 40 provided on both sides in the width direction of the central region R2 of the napkin 1. It has been.

=== About Absorber 10 ===
FIG. 4 is a plan view of the napkin 1 for explaining the absorbent body 10.
A folding guide 15 along the longitudinal direction is provided at the center of the absorbent body 10 in the width direction. As shown in FIG. 3B, in the folding guide portion 15, the absorbent body 10 is pressed and recessed from the non-skin side in the thickness direction, and the density of the absorbent core 12 is higher than that in the adjacent region. By means of the folding guide portion 15, the absorbent body 10 is easily bent along the longitudinal direction so as to protrude toward the skin side, and is easily adhered to the excretion opening (vaginal opening) of the wearer. Therefore, it is preferable that the folding guide portion 15 is provided at least in the central region R2 in the longitudinal direction of the napkin 1.

  The folding guide portion 15 is not limited to being formed by pressing. For example, the basis weight of the absorbent core 12 is lowered along the longitudinal direction, the absorbent body 10 is subjected to a process of bending the absorbent body 10 along the longitudinal direction in the manufacturing process, or a hot melt adhesive is applied along the longitudinal direction. The folding guide portion 15 may be formed by applying the coating.

  Further, the absorbent core 12 includes a pair of front cutout portions 50, a pair of rear cutout portions 51, a pair of front slits 52, a rear slit 53, and a front cutout portion 54. In these parts 50-54, the absorptive core 12 does not exist and rigidity is low compared with the area | region where the absorptive core 12 exists. In addition, in the said parts 50-54, the skin side sheet | seat 11 and the non-skin side sheet | seat 13 may exist or may not exist.

  The pair of front cutout portions 50 and the pair of rear cutout portions 51 are respectively arranged on the outer side in the longitudinal direction from the wing portion 30 and at the both ends in the width direction of the absorbent core 12. This is a cut-out part. Specifically, although the absorptive core 12 is notched in a mountain shape that is convex inward in the width direction, the shape of the notch is not limited thereto. Moreover, a pair of front side notch part 50 (a pair of 2nd low basic weight area | region) is provided in the side near the center area | region R2 (wing part 30) among front side area | region R1, and is for individual packaging in a longitudinal direction It overlaps with the front side folding part Ff. The pair of rear notch portions 51 (a pair of second low basis weight regions) are provided on the side of the rear region R3 that is closer to the central region R2 (wing portion 30), and are folded back in the longitudinal direction. It overlaps with the part Fb.

  The pair of front slits 52 are portions where the absorbent core 12 is elongated from the front end of the absorbent core 12 inwardly, and are provided symmetrically with respect to the longitudinal center line CL. The vertical center line CL is a line along the longitudinal direction that bisects the napkin 1 in the width direction. Further, the front slit 52 is inclined inward in the width direction toward the center side in the longitudinal direction, and is provided on the front side in the longitudinal direction from the front notch 50.

  The rear slit 53 is a portion where the absorbent core 12 is cut out along the longitudinal direction from the center in the width direction at the rear end of the absorbent core 12 to the inward direction. The rear slit 53 extends to a position overlapping the rear notch 51 in the longitudinal direction.

  The front cutout portion 54 is a portion in which the central portion in the width direction of the absorbent core 12 is cut out in the width direction at a position overlapping the pair of front cutout portions 50 in the longitudinal direction.

  The napkin 1 having the absorbent core 12 having the above configuration is easy to fit the wearer. Therefore, excrement is difficult to leak, the uncomfortable feeling wearing the napkin 1 can be reduced, and the comfort is good. This will be described below.

  The central region R2 of the napkin 1 is easily deformed so that the cross section has a W shape. Specifically, the center part in the width direction easily protrudes to the skin side by the folding guide part 15 and closely contacts the wearer's excretion opening. Also, under the influence of the rubber of the leg underwear of the underwear, both sides in the width direction rise to the skin side and wrap around the wearer's labia. In the central region R <b> 2 of the napkin 1, the point-like pressing part 6 and the linear pressing part 40 are provided. Therefore, the side part in the width direction has relatively high rigidity, and rises to the skin side without being crushed by the force of pinching the wearer's leg.

  The front region R1 and the rear region R3 of the napkin 1 are likely to rise from the longitudinal position where the pair of front cutouts 50 and the pair of rear cutouts 51 are provided. Therefore, the napkin 1 is easily deformed into a shape that passes from the lower abdomen of the wearer to the groin through the crotch and fits the wearer.

  Further, the front region R1 and the rear region R3 of the napkin 1 are easily twisted with respect to the central region R2 by the pair of front cutout portions 50 and the pair of rear cutout portions 51 (for example, the vertical center line CL is It is easy to swing as a shaft). Therefore, the napkin 1 can follow various movements of the wearer, and a state of being in close contact with the wearer is maintained.

  Furthermore, a pair of front side notch part 50, the front side cutout part 54, and the front side folding part Ff overlap in the longitudinal direction. In addition, the pair of rear notch portions 51 and the rear side folding Fb overlap in the longitudinal direction. Therefore, the front region R1 and the rear region R3 of the napkin 1 are more likely to rise and twist with respect to the central region R2.

  Moreover, in a pair of front side notch part 50 and a pair of rear side notch part 51, the rigidity of the napkin 1 is low and it is easy to deform | transform. Therefore, the rising of the side part in the width direction in the central region R <b> 2 of the napkin 1 is cut off by the pair of front notch parts 50 and the pair of rear notch parts 51. Similarly, the rear slit 53 and the front cutout portion 54 overlap with the folding guide portion 15 in the width direction. Therefore, the rising of the central portion in the width direction in the central region R <b> 2 of the napkin 1 is cut off by the rear slit 53 and the front cutout portion 54. That is, the W-shaped deformation in the central region R2 of the napkin 1 is difficult to be transmitted to the front region R1 and the rear region R3, and the front region R1 and the rear region R3 are curved along the lower abdomen and buttocks of the wearer. It deforms to the shape of the surface and fits the wearer.

  Further, the front region R1 of the napkin 1 is easily bent and fitted by the pair of front slits 52 so as to wrap around the wearer's lower abdomen (an inverted triangular region surrounded by a so-called bikini line). Moreover, when a wearer's leg is closed and the said inverted triangle site | part becomes small, the excess part of the absorptive core 12 can escape to the front side slit 52, and the absorptive core 12 will be crumpled. Can be prevented. That is, the top sheet 3 and the back sheet 5 are neatly folded at the front slit 52, and the front region R1 fits the lower abdomen of the wearer without any gap.

  Similarly, the rear region R3 of the napkin 1 is easily bent and fitted along the wearer's buttocks by the rear slit 53. In addition, the absorbent cores 12 on both sides of the rear slit 53 are easy to move independently. Therefore, even when the left and right buttocks move differently during walking of the wearer or the like, the absorbent core 12 can follow the left buttocks and the right buttocks, and the state of being in close contact with the buttocks is easily maintained.

  As described above, the front region R1 and the rear region R3 of the napkin 1 are provided with slits along the vertical center line CL as in the rear slit 53, or in the vertical center as in the pair of front slits 52. It is preferable that a plurality of slits are provided radially from a point on the line CL. By doing so, the front region R1 and the rear region R3 of the napkin 1 can be easily along the lower abdomen and buttocks of the wearer.

In the present embodiment, the basis weight of the absorbent core 12 in the pair of front cutout portions 50, the pair of rear cutout portions 51, the pair of front slits 52, the rear slit 53, and the front cutout portion 54. Is set to zero. However, the present invention is not limited to this, and the absorbent core 12 may be present in the above-described parts 50 to 54, and the basis weight (mass per unit area [g / m ² ]) of the absorbent core 12 compared to the adjacent region. It should be low. Even in this case, the portions 50 to 54 are less rigid than the other regions, and the same effect can be obtained. Moreover, the form which the absorptive core 12 does not have the said site | parts 50-54 may be sufficient.

  Moreover, what is necessary is just to perform the comparison of the basic weight of the absorptive core 12 of the said parts 50-54 and its adjacent area by a well-known method. For example, the target part is cut out from the napkin 1 as a sample, and the mass and area of each sample are measured. And it is the method of calculating and comparing the mass per unit area. In addition, if the conditions of a comparative sample are the same, you may compare the basic weight in the state which the skin side sheet | seat 11 and the non-skin side sheet | seat 13 have adhere | attached on the absorptive core 12. FIG.

=== Regarding the Linear Press 40 ===
FIG. 5 is a diagram illustrating the linear pressing unit 40 provided in the front region R1. FIG. 6 is a diagram illustrating the linear pressing unit 40 provided in the rear region R3. As described above, a plurality of linear pressing portions 40 are provided on the skin side surface of the napkin 1 along the outline of the absorbent core 12, and an adhesive region 21 is provided on the non-skin side surface of the napkin 1. ing. In FIG. 4 to FIG. 6, the linear squeezed portion 40 and the adhesive region 21 are depicted overlappingly in plan view (viewed in the thickness direction).

  In the napkin 1 of the present embodiment, as shown in FIG. 4, the longitudinal ends 12 a and 12 b of the absorbent core 12 are positioned more outward in the longitudinal direction than the longitudinal ends 21 a and 21 b of the adhesive region 21. ing. Therefore, the both ends of the longitudinal direction of the absorptive core 12 do not overlap with the adhesion area | region 21, and are not fixed to underwear.

  Then, the linear pressing part 40 is provided in corner part 12A (part which showed the outline with the thick line) of the absorptive core 12 which is not fixed to underwear. Specifically, in the longitudinal direction, on the outer side than the ends 21a and 21b of the adhesive region and on both ends in the width direction (that is, one side and the other side in the width direction with respect to the longitudinal center line CL), The “shaped pressing part 41 (first recess)” and the “second linear pressing part 42 (second recess)” are provided. Moreover, the 1st linear pressing part 41 and the 2nd linear pressing part 42 are provided in the both sides of the longitudinal direction, respectively.

  In addition, 41 A of 1st linear pressing parts of the front side of a longitudinal direction and the 2nd linear pressing part 41B of the front side are symmetrical shapes with respect to the longitudinal centerline CL, and the 1st linear pressing part 41B of the rear side and back Although the 2nd linear pressing part 42B of a side is a symmetrical shape with respect to the longitudinal centerline CL, it is not limited to this. Moreover, although the front side 1st linear pressing part 41A and 2nd linear pressing part 42A, and the back side 1st linear pressing part 41B and the back side 2nd linear pressing part 42B are different shapes, this It is not limited to.

  In the linear pressing part 40, as shown to FIG. 3B, the absorptive core 12 is dented in the thickness direction, and the density of the absorptive core 12 is high compared with the adjacent area | region where the absorptive core 12 is not squeezed. Therefore, the rigidity is high in the portion where the linear compressed portion 40 is provided. Therefore, the corner portion 12A of the absorbent core 12 is also highly rigid due to the first linear pressing portion 41 and the second linear pressing portion 42, and it is easy to maintain the surface shape. Therefore, when the underwear to which the napkin 1 is attached is pulled up for mounting the napkin 1, even if the corner 12A of the absorbent core 12 is not fixed to the underwear, it is difficult for the wearer to fall down or break. Therefore, when the underwear is in close contact with the wearer via the napkin 1, the corner 12A of the absorbent core 12 does not twist or bend, and the napkin 1 is easily attached appropriately.

  In other words, according to the napkin 1 of the present embodiment in which the linear pressing portion 40 is provided at the corner 12A of the absorbent core 12, the napkin 1 is appropriately mounted even if the length of the adhesive region 21 is short. Therefore, the application amount of the adhesive forming the adhesive region 21 can be reduced, and the release paper that covers the adhesive region 21 can be reduced during individual packaging, thereby reducing the cost.

  Moreover, the 1st linear pressing part 41 and the 2nd linear pressing part 42 are spaced apart in the width direction, and are discontinuous. Therefore, the front region R1 and the rear region R3 of the napkin 1 are difficult to be fixed in a flat shape, move supple, and both end portions in the width direction can move independently. Therefore, the front region R1 and the rear region R3 of the napkin 1 are easily curved along the wearer's lower abdomen and buttocks. Moreover, it can follow each of a left side buttock and a right side buttock, and it is easy to maintain the state closely_contact | adhered to a heel part. As described above, the napkin 1 of the present embodiment has good fit while being properly attached.

  Moreover, the 1st linear pressing part 41 and the 2nd linear pressing part 42 are outside the edge 21a, 21b of the adhesion area | region 21 in a longitudinal direction, and are also the edge 21c, 21d of the adhesion area | region 21 also in the width direction. It is preferable that it is provided outside. By doing so, the linear pressing part 40 will be provided in the corner part 12A of the absorptive core 12 which is easy to fall down and bend easily at the time of raising of underwear. Therefore, the napkin 1 is easily attached without the corner 12A of the absorbent core 12 being twisted or bent more reliably.

  Moreover, although the 1st linear pressing part 41 and the 2nd linear pressing part 42 should just be provided in the at least one side of the longitudinal direction, the 1st linear pressing part 41 and the 2nd line are respectively provided in the both sides of a longitudinal direction. It is preferable that the shape pressing part 42 is provided. By doing so, it is easy to mount the napkin 1 without the four corners 12A of the absorbent core 12 being twisted or broken.

  In that case, if the 1st linear pressing part 41A and the 2nd linear pressing part 42A of the front side, and the 1st linear pressing part 41B and the 2nd linear pressing part 42B of the back side are continuing, napkin 1 There is a possibility that the rise of the side portion in the width direction in the central region R2 is transmitted to the front region R1 and the rear region R3. Therefore, the first linear pressing part 41A on the front side and the first linear pressing part 41B on the rear side are separated in the longitudinal direction, and the second linear pressing part 42A on the front side and the second linear pressing part 42B on the rear side are separated. It is preferable that they are separated in the longitudinal direction. By doing so, the front side area | region R1 and the rear side area | region R3 of the napkin 1 curve along a wearer's lower abdominal part and buttocks, and fit property is good.

  Also, a pair of front slits 52 are provided between the front first linear pressing part 41A and the front second linear pressing part 42A, and the rear first linear pressing part 41B and the rear first linear pressing part 41A are provided. A rear slit 53 is provided between the two linear compressed parts 42B. As described above, when the absorbent core 12 is provided with the front slit 52 and the rear slit 53 (low basis weight region), the fit of the napkin 1 is improved.

  On the other hand, when pulling up the underwear, the outer portion in the width direction is more likely to fall or break than the front slit 52 and the rear slit 53. Therefore, like the napkin 1 of this embodiment, the 1st linear pressing part 41 and the 2nd in the site | part 12A of the width direction of the front side slit 52 or the rear side slit 53, ie, the corner part 12A of the absorptive core 12. It becomes more effective to provide the linear pressing part 42.

  Further, not only the corner 12 </ b> A of the absorbent core 12 but also the portion 12 </ b> B of the absorbent core 12 between the pair of front slits 52 may fall or be broken when the napkin 1 is attached. Therefore, in the longitudinal direction, it is also referred to as a linear pressing portion 40 (hereinafter referred to as a third linear pressing portion 43 (third recess)) between the front side (outside) of the end 21a of the adhesive region and between the pair of front slits 52. ) Should be provided. By doing so, the rigidity of the part 12B of the absorbent core 12 between the pair of front slits 52 is increased, and the surface shape is easily maintained. Therefore, the napkin 1 is easily mounted without causing the part 12B of the absorbent core 12 between the pair of front slits 52 to bend or break.

  Moreover, it is preferable that the 3rd linear pressing part 43 is spaced apart in the width direction from the 1st linear pressing part 41, and is spaced apart also in the width direction with the 2nd linear pressing part 42. By doing so, the three regions 12A and 12B of the absorbent core 12 defined by the pair of front slits 52 are easily movable independently, and the front region R1 of the napkin 1 is easily curved along the lower abdomen of the wearer. .

  In addition, at least one part of the absorptive core 12 should just be squeezed in the linear pressing part 40 (1st recessed part, 2nd recessed part, 3rd recessed part), and it is squeezed from the top sheet 3 like this embodiment. Not limited to. Moreover, in the linear pressing part 40 of this embodiment, several dotted | punctate pressing parts are located in a line at a narrow space | interval, and the density of the average absorptive core 12 of the linear pressing part 40 is compared with an adjacent area | region. It is high. However, the present invention is not limited to this, and the linear pressing part 40 may be a groove-like pressing part in which the entire area is compressed. In addition, a plurality of dot-shaped compressed parts may be provided at relatively large intervals between the corner 12A of the absorbent core 12 and the pair of front slits 52, instead of the linear compressed parts 40.

What is necessary is just to perform the comparison of the density of the absorptive core 12 of the linear pressing part 40 and its adjacent area | region by a known method. For example, a cross section of the absorbent core 12 cut in the thickness direction is photographed with an electron microscope or the like, and the density difference is visually compared or the number of fibers is counted and compared. In addition, the target part is cut out from the napkin 1 as a sample, the basis weight (g / m ² ) is calculated by dividing the mass of each sample by the area, and the basis weight is divided by the thickness to obtain the density (g / m ³ ) may be calculated and compared. In addition, if the conditions of a comparative sample are the same, you may compare in the state which the skin side sheet | seat 11 and the non-skin side sheet | seat 13 have adhere | attached on the absorptive core 12. FIG.

  Moreover, it is preferable that the adhesion area | region 21 is provided in the both sides of the width direction of a pair of front side slit 52, respectively. Similarly, it is preferable that the adhesive regions 21 are provided on both sides of the rear slit 53 in the width direction. By doing so, it adheres to the base portion of the three regions 12A and 12B of the absorbent core 12 defined by the pair of front slits 52 and the two regions 12A of the absorbent core 12 defined by the rear slits 53. A region 21 is provided, and the root portion is fixed to the undergarment. In addition, the 1st linear pressing part 41-the 3rd linear pressing part 43 are provided in the outer side of the longitudinal direction rather than the adhesion area | region 21. FIG. Therefore, the regions 12A and 12B of the absorbent core 12 defined by the pair of front slits 52 and the rear slits 53 are not easily collapsed when the undergarment is pulled up, and are not easily folded, so that the absorbent core 12 is not twisted or folded. 1 is easily mounted.

  In the napkin 1 of the present embodiment, a part of the first linear pressing part 41 and a part of the second linear pressing part 42 are provided on the outer side in the longitudinal direction than the adhesive region 21. In this case, in plan view, another part of the first linear pressing part 41 (411 and 412 in FIGS. 5 and 6) and another part of the second linear pressing part 42 (FIG. 5 and FIG. 5). 6 421, 422) preferably overlap with the adhesive region 21.

  By doing so, linear compression part 40 (41, 42) overlaps with adhesion field 21, and the rigidity of corner 12A of absorptive core 12 increases continuously from the part fixed to underwear. Therefore, at the time of raising the underwear, the corner 12A of the absorbent core 12 is easy to maintain the state along the underwear, and it is difficult to fall over and break. Therefore, the napkin 1 is easily attached without the corner 12A of the absorbent core 12 being twisted or bent.

  Furthermore, as shown in FIG. 5, on the front side in the longitudinal direction, in plan view, one end 411 and the other end 412 of the first linear compressed portion 41A overlap with the adhesive region 21, and the second linear compressed portion 42A The one end 421 and the other end 422 overlap with the adhesive region 21. That is, the first first linear squeezed portion 41A and the second front linear squeezed portion 42A overlap the adhesive region 21 again from the region overlapping with the adhesive region 21 through the corner 12A of the absorbent core 12. The shape returns to the region.

  Therefore, the rigidity of the corner 12A of the absorbent core 12 is continuously increased from two places (411 and 412 and 421 and 422 in FIG. 5) fixed to the underwear. Therefore, the corner 12A of the absorbent core 12 is more unlikely to fall down and bend easily when the underwear is pulled up, and the napkin 1 is attached without the corner 12A of the absorbent core 12 being twisted or broken.

  Moreover, 41 A of 1st linear pressing parts of the front side and 42 A of 2nd linear pressing parts of the front side have the folding | returning part 44 (for example, the part of b-d of FIG. 5) currently turned from the outer side of a longitudinal direction to the center side. . Similarly, the first linear pressing portion 41B on the rear side and the second linear pressing portion 42B on the rear side are also turned back from the outer side in the longitudinal direction to the center side (for example, portions a to c in FIG. 6). ).

  In other words, a portion (for example, c to a in FIG. 5 or b to a in FIG. 6) from the outermost end to one end in the longitudinal direction of each linear pressing portion 40 and each linear pressing portion 40 from the outer end. Sites up to the other end (for example, c to e in FIG. 5 and b to d in FIG. 6) are separated in the width direction.

  Therefore, the area | region where the absorptive core 12 is squeezed becomes large in the corner part 12A of the absorptive core 12 by the part which the linear pressing part 40 (41, 42) turned back, and the corner | angular part 12A of the absorptive core 12 Increased rigidity. Further, since the folded portion 44 has a component in the longitudinal direction and a component in the width direction, a region surrounded by the folded portion 44 (portion indicated by hatching) can easily maintain a planar shape. Therefore, the corner 12A of the absorbent core 12 is more unlikely to fall or bend when the underwear is pulled up, and the napkin 1 is attached without the corner 12A of the absorbent core 12 being twisted or broken.

  Furthermore, the folding | returning part 44 of the linear pressing part 40 (41, 42) has comprised the substantially heart shape, and the area | region enclosed by the folding | turning part 44 is a substantially closed area | region. Therefore, the design of the napkin 1 is enhanced, and the area surrounded by the folded portion 44 is more easily maintained in a planar shape because the density of the absorbent core 12 on the inside thereof is increased.

  Further, in the front region R1 of the napkin 1 (FIG. 5), a pair of front slits 52 are provided, and the region 12B of the absorbent core 12 therebetween has a substantially heart shape. Therefore, in the longitudinal direction, the portion of the absorbent core 12 that overlaps the first linear compressed portion 41A on the front side, the second linear compressed portion 42A on the front side, and the third linear compressed portion 43 has an uneven contour. It has a shape and has a predetermined number (here, 4) of protrusions p1 to p4. And the front 1st linear pressing part 41A, the front 2nd linear pressing part 42A, and the 3rd linear pressing part 43 are along the outline of the absorptive core 12, and the folding | returning part 44 is Since it has a substantially heart shape, it has the predetermined number (four) or more of the protrusions p1 to p6 (six).

  Similarly, the site | part (FIG. 6) of the absorptive core 12 which overlaps with the 1st linear pressing part 41B of the rear side in the longitudinal direction and the 2nd linear pressing part 42B of the rear side has an uneven | corrugated shape. And a predetermined number (eight in this case) of protrusions p1 to p8. And since the 1st linear pressing part 41B of a rear side and the 2nd linear pressing part 42B of a rear side are along the outline of the absorptive core 12, it is the same number of protrusions as the said predetermined number (8 pieces). It has parts p1-p8.

  The contour of the rear region R3 of the napkin 1 has an uneven shape, and the linear compressed portion 40 (41, 42) is along the contour, so that the absorbent core 12 is deformed according to the movement of the wearer. At this time, the absorbent core 12 is easily broken along the valley portion p0 between the projecting portions p1 to p8, and the occurrence of creases can be made constant. Therefore, it is possible to prevent the absorbent core 12 from being crumpled, and to reduce the generation of gaps due to the occurrence of disordered wrinkles and the feeling of discomfort wearing the napkin 1. Further, since the plurality of valleys p0 are provided in the rear region R3 of the napkin 1, it is possible to generate a constant crease according to various movements of the wearer.

  Thus, the linear pressing part 40 is formed along the outline of the absorptive core 12. Specifically, the linear pressing part 40 is formed in approximately 1 mm to 10 mm inside from the outline of the absorbent core 12 in the same shape as the outline of the absorbent core 12. By doing so, the user can be given an impression that is comfortable to wear due to the bulge inside the linear squeezed portion 40 or a high-quality impression. Moreover, in the napkin 1 of this embodiment, the shape of the absorptive core 12 is characterized by slits 52 and 53 being provided in the absorptive core 12 in order to improve fit, and the contours having an uneven shape. Is. Therefore, by making the linear pressing part 40 follow the outline of the absorbent core 12, the user can recognize the characteristic shape of the absorbent core 12.

  As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof.

1 sanitary napkin (absorbent article), 2 side sheet,
3 Top sheet, 4 Second sheet, 5 Back sheet,
R1 front region, R2 center region, R3 rear region,
10 absorbent body, 11 skin side sheet, 12 absorbent core, 13 non-skin side sheet,
14 Absorber point squeezing part, 15 folding induction part,
20 napkin body, 21 adhesive area,
30 Wing part, 31 Wing part adhesive area,
40 linear pressing part,
41 1st linear pressing part (1st recessed part), 42 2nd linear pressing part (2nd recessed part),
43 3rd linear pressing part (3rd recessed part), 44 Folding part,
50 front notch (second low basis weight region), 51 rear notch (second low basis weight region),
52 front slit (low basis weight area), 53 rear slit (low basis weight area),
54 Front side cut-out part, p0 valley part, p1-p8 protrusion part,

The main invention for achieving the above object is an absorbent article having a longitudinal direction, a width direction, and a thickness direction, and having an absorbent core, wherein a non-skin side surface is provided with an adhesive region, A first recess and a second recess in which the absorbent core is recessed in the thickness direction are provided on the outer side in the longitudinal direction and at both ends in the width direction with respect to the end of the adhesive region on at least one side in the longitudinal direction. In the first recess and the second recess, the density of the absorbent core is higher than in the adjacent region, and the first recess and the second recess are separated in the width direction , Between the 1st crevice and the 2nd crevice, the basic weight of the absorptive core is low compared with an adjacent field, and the low basic weight field is provided, Between the 1st crevice and the 2nd crevice, A pair of the low basis weight regions are provided, and the viscosity in the longitudinal direction is A third recess in which the absorbent core is recessed in the thickness direction is provided outside the end of the region and between the pair of low basis weight regions, and in the third recess, in the adjacent region The absorbent article is characterized in that the density of the absorbent core is higher than that of the absorbent article.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

Claims (11)

An absorbent article having a longitudinal direction, a width direction, and a thickness direction, and comprising an absorbent core,
Adhesive area is provided on the non-skin side,
A first recess and a second recess in which the absorbent core is recessed in the thickness direction on the outer side in the longitudinal direction and at both ends in the width direction than the end of the adhesive region on at least one side in the longitudinal direction Is provided,
In the first recess and the second recess, the density of the absorbent core is high compared to the adjacent region,
The said 1st recessed part and the said 2nd recessed part are spaced apart in the said width direction, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 1,
The said 1st recessed part and the said 2nd recessed part are provided in the outer side rather than the edge of the said adhesion area | region in the said width direction. The absorbent article according to claim 1 or 2,
The absorbent article characterized by the low basic weight area | region where the basic weight of the said absorptive core is low compared with an adjacent area | region between the said 1st recessed part and the said 2nd recessed part. The absorbent article according to claim 3,
A pair of the low basis weight regions is provided between the first recess and the second recess,
A third recess in which the absorbent core is recessed in the thickness direction is provided outside the end of the adhesive region in the longitudinal direction and between the pair of low basis weight regions;
In the third recess, the absorbent article has a higher density of the absorbent core than an adjacent region. The absorbent article according to claim 3 or claim 4,
The absorbent article, wherein the adhesive region is provided on both sides in the width direction of the low basis weight region. The absorbent article according to any one of claims 1 to 5,
The first recess and the second recess are linear recesses,
An absorptive article characterized in that a part of each of the 1st crevice and the 2nd crevice has overlapped with the adhesion field in plane view. The absorbent article according to claim 6,
An absorbent article, wherein one end and the other end of each of the first recess and the second recess overlap the adhesive region in plan view. The absorbent article according to any one of claims 1 to 7,
The said recessed part is a linear recessed part, and has a folding | returning part turned back from the outer side of the said longitudinal direction to the center side, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 8,
The part of the absorbent core that overlaps with the first recess and the second recess in the longitudinal direction has a contoured contour, and has a predetermined number of protrusions,
The said 1st recessed part and the said 2nd recessed part are linear recessed parts along the outline of the said absorptive core, and have the said predetermined number of protrusion parts, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 9,
The first recess and the second recess are respectively provided on both sides in the longitudinal direction;
The first concave portion and the second concave portion on the front side in the longitudinal direction are spaced apart from the first concave portion and the second concave portion on the rear side in the longitudinal direction in the longitudinal direction. Goods. It is an absorptive article given in any 1 paragraph of Claims 1-10,
A pair of wings extending in the width direction;
A pair of second low-basis weight regions having a lower basis weight of the absorbent core than the adjacent regions are provided outside the wing portion in the longitudinal direction and at both ends in the width direction of the absorbent core. Absorbent article characterized by being made.

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