JP2009201878A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article having a superior concealing property of menstrual blood absorbed in an absorber formed by overlapping groove parts where high-density areas are formed on the absorber and other groove parts where high-density areas are formed on the surface sheet. <P>SOLUTION: A sanitary napkin 1 includes a pair of first compressed grooves 5 and 5 formed to extend in the longitudinal direction Y of the absorbent article while the surface sheet 2 of the absorber 4 dents, and a pair of second compressed grooves 6 and 6 formed to overlap to the first compressed grooves 5 and 5 with a part or the whole while the surface sheet 2 dents at the side of the absorber, and first high-density portions 5a of the absorber side and second high-density portions 5b of the absorber side between the first high-density portions 5a are formed on bottoms of the first compressed grooves 5 and 5 respectively, and high-density portions 6a of the surface sheet side are formed in the second compressed grooves 6 and 6 by direct attachment to each first high-density portion 5a of the absorber side and laminar arrangement. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a sanitary napkin.

  Conventionally, in sanitary napkins as absorbent articles, sanitary napkins in which concave leak-proof grooves are formed on the surface sheet side have been proposed in order to suppress leakage of excreted menstrual fluid and the like. .

  For example, it consists of a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorber interposed between the two sheets, and extends in the longitudinal direction of the absorber on the upper and lower surfaces of the region where the absorber is located. A sanitary napkin having a pair of compressed grooves has been proposed (see, for example, Patent Document 1). A sanitary napkin provided with these squeezed grooves is obtained by squeezing at a high pressure with a desired mold in a state where the liquid-permeable surface sheet and the absorbent body are overlapped. By providing these pressing grooves, menstrual blood that flows on the top surface of the topsheet can be prevented from leaking outward in the width direction along the top surface of the topsheet.

  Moreover, it can suppress that the menstrual blood which permeate | transmitted the surface sheet and was absorbed by the absorber leaks to the width direction outer side by providing these pressing groove | channels. That is, when menstrual blood that has passed through the topsheet and absorbed by the absorbent body has shifted to the outside in the width direction, the menstrual blood is drawn to the high-density portion that is the compressed portion of the compressed groove in the absorbent body, and the width direction Leakage to the outside can be suppressed.

  Moreover, since these pressing groove | channels function as a fold origin, the conformity adhesiveness to the excretion part in a sanitary napkin can be improved. That is, using these compressed groove as a starting point, the region sandwiched between the compressed grooves protrudes toward the excretion part and is deformed so as to be in close contact with the excretion part.

JP-A-9-108262 (Patent No. 3053561)

  However, since the compressed groove in the sanitary napkin of Patent Document 1 is formed by compressing both the top sheet and the absorbent body, it has been drawn to the high density portion of the compressed groove formed in the absorbent body. Blood moves to the surface sheet side. Thereby, since the red color of menstrual blood is excessively visually recognized through the surface sheet, the user may feel uncomfortable.

  In the present invention, the groove formed on the absorbent body and formed with a plurality of high-density portions and the groove formed on the top sheet and formed with a plurality of high-density portions are overlapped with each other. It aims at providing the absorbent article excellent in the concealment property of the absorbed menstrual blood.

  (1) An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between the top sheet and the back sheet. The absorbent body side groove portion formed so as to be recessed in the absorbent body and extending in the longitudinal direction of the absorbent article, and the top sheet is formed in a recess toward the absorbent body, or all or A top sheet side groove portion disposed so as to partially overlap the absorber side groove portion, and at the bottom of the absorber side groove portion, an absorber side first high density portion and the absorber side first high density A plurality of absorber-side second high-density portions formed between the portions are formed, and the top sheet-side groove portion is stacked in contact with each of the plurality of absorber-side first high-density portions. High density part on the top sheet side Absorbent article formed.

  (2) The absorbent article according to (1), wherein the interval between the plurality of top sheet side high density portions is configured to be longer than the interval between the plurality of absorber side second high density portions.

  (3) Between the plurality of surface sheet side high density portions in the surface sheet, a surface sheet side medium density portion is formed with a compressive force weaker than compression in the surface sheet side high density portion, and the absorption Between the plurality of absorber-side first high-density portions in the body, an absorber-side medium density region is formed with a compressive force weaker than compression in the absorber-side first high-density portion, and the surface sheet-side medium density The absorbent article according to (1) or (2), wherein the density of the part is lower than the density of the absorber-side medium density region.

  (4) The absorber-side medium density region is formed between the plurality of absorber-side second high-density portions in the absorber, and is weaker than the compression in the absorber-side second high-density portion. Formed between the absorber-side first medium density portion formed by compressive force, and the absorber-side first high-density portion and the absorber-side second high-density portion in the absorber, The absorbent article according to (3), including an absorber-side second medium density portion formed with a compression force weaker than the compression in the absorber-side second high-density portion.

  (5) The absorbent article according to (4), wherein the top sheet side medium density portion is in contact with the absorber side first medium density portion from the front side.

  (6) The top sheet side medium density part is separated from the absorber side second high density part and covers the absorber side second high density part from the front side in any one of (3) to (5) The absorbent article as described.

  According to the present invention, the groove portion formed in the absorber and formed with a plurality of high-density portions and the groove portion formed in the top sheet and formed with the plurality of high-density portions are formed so as to overlap each other. An absorptive article excellent in concealing the menstrual blood absorbed by the body can be provided.

Hereinafter, a sanitary napkin 1 as an absorbent article in an embodiment of the present invention will be described based on the drawings.
First, the structure of the sanitary napkin 1 will be described with reference to FIGS. FIG. 1 is a plan view of a sanitary napkin 1. FIG. 2 is a cross-sectional view of the sanitary napkin 1 taken along the line AA. FIG. 3 is a plan view of the absorbent body 4 constituting the sanitary napkin 1. FIG. 4 is a cross-sectional view of the first pressing groove 5 and the second pressing groove 6.

  As shown in FIG. 1, the sanitary napkin 1 as an absorbent article is substantially vertically long. The sanitary napkin 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent body 4 disposed between the top sheet 2 and the back sheet 3. In addition, the sanitary napkin 1 includes a pair of first pressing grooves 5 and 5 as absorbent side grooves formed in the absorbent body 4 and a pair of surface sheet side grooves formed in the top sheet 2 and the absorbent body 4. Second compressed grooves 6 and 6. The 1st pressing grooves 5 and 5 and the 2nd pressing grooves 6 and 6 are formed so that it may overlap in the thickness direction. In other words, the second pressing grooves 6 and 6 are formed along the first pressing grooves 5 and 5.

  The absorbent body 4 and the top sheet 2 in which the first compressed grooves 5 and 5 are formed are formed by the second compressed grooves 6 and 6 formed in a state where the top sheet 2 is laminated on the absorbent body 4 and a hot melt adhesive. Bonded and fixed. The back sheet 3 and the absorbent body 4 are bonded and fixed together with a hot melt adhesive or the like. The top sheet 2 and the back sheet 3 are bonded and bonded together by a hot melt adhesive and heat sealing.

  Further, the sanitary napkin 1 is formed with a pair of wings 10 and 10 for fixing to the underwear and a fixing portion (not shown). A fixing portion (not shown) is formed at the center of the back sheet 3 in the sanitary napkin 1. The sanitary napkin 1 is fixed to the underwear by fixing the fixing portion to the inside of the crotch portion of the underwear. An adhesive portion (not shown) is formed on the back side of the wings 10 and 10 in FIG. The sanitary napkin 1 can be attached to the underwear by folding the wings 10 and 10 toward the back sheet 3 and attaching the adhesive portion to the outside of the underwear.

Next, each component constituting the sanitary napkin 1 will be described.
The top sheet 2 is made of a cellulose fiber such as rayon, a spunlace nonwoven fabric formed from a synthetic fiber resin, a nonwoven fabric formed from a synthetic resin fiber such as PE, PP, or PET, and an air-through nonwoven fabric formed from the synthetic resin fiber. Etc. are used. Moreover, what is generally used for the sanitary napkin can be used for the back surface sheet 3, the absorber 4, and a hot-melt adhesive. Here, in this embodiment, the absorbent body 4 also includes a non-woven fabric called a second sheet or a cushion sheet disposed between the top sheet 2 and the absorbent body 4.

  As shown in FIGS. 1 to 3, the first pressing grooves 5 and 5 as high density regions are formed in the absorbent body 4. The first pressing grooves 5 and 5 are formed to be separated from each other in the width direction X with the center line CL sandwiched between the absorbent body 4. The first pressing grooves 5 and 5 are formed so as to extend in the longitudinal direction Y. The 1st pressing grooves 5 and 5 are formed in the groove shape where the surface side (side by which the surface sheet 2 is arrange | positioned) in the absorber 4 was depressed.

  Each of the first pressing grooves 5 and 5 includes a plurality of absorber-side first high-density portions 5a and an absorber-side second high-density portion 5b that are intermittently formed so as to extend in the longitudinal direction Y. The Specifically, each of the first pressing grooves 5 and 5 includes a plurality of absorber-side first high-density portions 5a that are intermittently formed along the bottoms of the first pressing grooves 5 and 5, respectively. 2 high-density part 5b.

  As shown in FIG. 4, the absorber-side first high-density portions 5 a are formed at regular intervals along the bottom surfaces of the first pressing grooves 5 and 5. The absorber-side first high-density portion 5a is a portion formed by integrally compressing the topsheet 2 and the absorber 4 as will be described later, and is formed after the first compressed grooves 5 and 5 are formed. It is a part to be done. In each of the plurality of absorber-side first high-density portions 5a, a later-described topsheet-side high-density portion 6a formed on the topsheet 2 is laminated.

  The absorber-side second high density portions 5b are formed at regular intervals along the bottom surfaces of the first compressed grooves 5 and 5. The absorber-side second high-density portion 5 b is a portion formed only on the absorber 4. In each of the plurality of absorber-side second high-density parts 5b, portions that constitute the bottom surfaces of the second pressing grooves 6 and 6 in the topsheet 2 and are not formed with the topsheet-side high-density parts 6a are laminated. Is done. The absorber-side second high-density portion 5b is disposed in a state where the upper surface side of the absorber-side second high-density portion 5b is not joined to the topsheet 2.

  The absorber-side second high density portions 5b are formed at intervals K2 that are narrower than the intervals K1 that are intervals between the plurality of absorber-side first high density portions 5a. The absorber-side second high-density portion 5b includes two parts between a predetermined absorber-side first high-density portion 5a and the absorber-side first high-density portion 5a adjacent to the predetermined absorber-side first high-density portion 5a. It is formed so that the absorber-side second high-density portion 5b is located.

  As shown in FIG. 4, each of the first compressed grooves 5 and 5 has a higher density portion than the number of the high density portions formed in the second compressed grooves 6 and 6. That is, the first pressing groove 5, 5 is in contact with the top sheet side high density portion 6a formed on the top sheet 2, and the absorbent side first high density portion 5a, and the top sheet side high density portion. Absorber-side second high-density portions 5b in which 6a is not stacked are formed.

  Furthermore, as shown in FIG. 4, each of the first compressed grooves 5 and 5 includes an absorber side first high density portion 5 a and an absorber side second high density portion 5 b, as well as an absorber side first high density portion 5 a. The absorber-side medium density region 5e is formed with a compression force weaker than the compression. The absorber-side medium density region 5e includes an absorber-side first medium density portion 5c and an absorber-side second medium density portion 5d. The absorber-side first medium density portion 5c is a portion formed between the absorber-side second high-density portions 5b. The absorber-side second medium density portion 5d is a portion formed between the absorber-side first high-density portion 5a and the absorber-side second high-density portion 5b. The absorber side first medium density portion 5c and the absorber side second medium density portion 5d are portions constituting the bottom surfaces of the second pressing grooves 6 and 6 in the surface sheet 2 and are formed with the surface sheet side high density portion 6a. The portions that are not stacked are stacked.

  Each of the first pressing grooves 5 and 5 is compressed (compressed) through the absorbent body 4 between the embossing roll formed with the convex portion corresponding to the absorbent-side second high-density portion 5b and the flat roll, and thereafter It is formed by pressing (compressing) the embossing roll in which the convex part corresponding to the top sheet side high density part 6a is formed and the laminated body of the absorbent body 4 and the top sheet 2 between the flat roll. The Here, as a means for squeezing (compression), not only the combination of the embossing roll and the flat roll as described above, but also one or both may be plate-shaped molds, and the side where the convex portion is not formed. A concave portion corresponding to the convex portion may be formed on the surface.

  The absorber-side first high-density portion 5a and the absorber-side second high-density portion 5b are portions that are strongly compressed (squeezed). The absorber side first medium density part 5c and the absorber side second medium density part 5d are weakly compressed parts. The absorber-side first high-density portion 5a and the absorber-side second high-density portion 5b are portions formed by being strongly squeezed by the protrusions in the above-described convex portion, and the density of the material constituting the absorber 4 is high. It is the part comprised so that it may become. Specifically, the density is increased with reference to the density of the region (uncompressed region) adjacent to the first compressed grooves 5 and 5 in the absorbent body 4. The absorber-side first high-density portion 5a and the absorber-side second high-density portion 5b are formed to have a higher density than the absorber-side first medium-density portion 5c and the absorber-side second medium-density portion 5d.

  The absorber side first medium density part 5c and the absorber side second medium density part 5d are weakly compressed parts as described above. The absorber-side first medium density portion 5c is a region that is weakly compressed as a result of the adjacent absorber-side second high-density portion 5b and the absorber-side second high-density portion 5b being strongly compressed. The absorber-side second medium density portion 5d is a region that is weakly compressed as a result of the adjacent absorber-side first high-density portion 5a and absorber-side second high-density portion 5b being strongly compressed. In the absorber-side first medium density portion 5c and the absorber-side second medium density portion 5d, the density of the material constituting the absorber 4 becomes higher than the adjacent region and lower than the absorber-side first high density portion 5a. Formed as follows. The absorber-side second medium density portion 5d is formed so that the material constituting the absorber 4 has a higher density than the absorber-side first medium density portion 5c.

  As shown in FIG. 3, the first pressing grooves 5 and 5 are formed symmetrically with respect to the center line CL. And the 1st pressing grooves 5 and 5 are formed in the width direction X mutually spaced apart 20 mm to 50 mm, more preferably 25 mm to 45 mm, for example. When the separation distance in the width direction X in the first pressing grooves 5 and 5 is smaller than 20 mm, the density in the central portion 20 as the central region formed between the first pressing grooves 5 and 5 is increased, so that the center The rigidity of the part 20 may be higher than necessary. That is, when the center part 20 is deformed so as to protrude toward the excretion part, it may not be suitably deformed. In addition, in the mounted state, the central portion 20 may become harder than necessary and the mounting property may be reduced. On the contrary, when the separation distance in the width direction X in the first pressing grooves 5 and 5 is larger than 50 mm, the width of the central portion 20 is too wide than the width of the discharge portion, so that the appropriate suitability of the central portion 20 with respect to the excretion portion. May not be obtained.

  The width dimension which is the length in the width direction X of the 1st pressing grooves 5 and 5 is 0.5 mm to 10 mm, for example, More preferably, it is 1 mm to 5 mm. When the width dimension of the 1st pressing grooves 5 and 5 is smaller than 0.5 mm, when the absorber 4 cuts along the 1st pressing grooves 5 and 5 at the time of manufacture or use, or the 1st pressing grooves 5 and 5 In the case where the menstrual blood cannot be sufficiently attracted by this and the menstrual blood cannot be prevented from leaking outside in the width direction X, or the sufficient rigidity of the first squeezing grooves 5 and 5 cannot be obtained. When it deform | transforms so that it may protrude in the excretion part side, this 1st pressing groove | channels 5 and 5 may not function as a fold starting point. On the contrary, when the width dimension of the 1st pressing groove | channels 5 and 5 is larger than 10 mm, since the rigidity of the 1st pressing groove | channels 5 and 5 becomes high too much, the fitting property at the time of mounting | wearing and a usability | use_condition may fall.

  Here, the stiffness of the first pressing grooves 5 and 5 is, for example, 300 mg / inch to 3000 mg / inch, more preferably 500 mg / inch to 2500 mg / inch. When the stiffness of the first compressed grooves 5 and 5 is smaller than 300 mg / inch, the inner force in the width direction X applied to both sides of the sanitary napkin 1 in the width direction X is absorbed when worn. Since it cannot be transmitted to the body 4, the center part 20 may not be deformed so as to protrude toward the excretion part. On the contrary, when the rigidity of the 1st pressing grooves 5 and 5 is larger than 3000 mg / inch, the rigidity of the 1st pressing grooves 5 and 5 may be too high, and the fitting property and usability | use_condition at the time of mounting may fall. Here, the rigidity of the 1st pressing grooves 5 and 5 is measured in accordance with prescription | regulation of JIS (Japan Industrial Standards) L-1096 8.20.1 A method (Gurley method).

  The space | interval in the longitudinal direction of the absorber side 1st high density part 5a and the absorber side 2nd high density part 5b which comprises the 1st pressing grooves 5 and 5 is 0.5 mm to 10 mm, for example, More preferably, it is 2 mm to 5 mm. is there. When this space | interval is smaller than 0.5 mm, the rigidity of the 1st pressing grooves 5 and 5 will become high, and the fitting property at the time of mounting | wearing and a usability | use_condition may fall. On the other hand, when this interval is larger than 10 mm, the interval between the absorber-side first high-density portions 5a may be too wide to suppress leakage from the outside in the width direction X of menstrual blood, which will be described later.

  Each of the first pressing grooves 5 and 5 functions as a leak-proof groove 60 that prevents menstrual blood that has passed through the top sheet 2 and is absorbed by the absorbent body 4 from leaking outside in the width direction X. Specifically, the first pressing grooves 5 and 5 include a plurality of absorber-side first high-density portions 5a and absorber-side second high-density portions 5b mainly constituting the first pressing grooves 5 and 5, respectively. The menstrual blood that has passed through 2 and has been absorbed by the central portion 20 of the absorbent body 4 and has shifted to the outside in the width direction X is attracted to prevent menstrual blood from leaking outside in the width direction X. Here, as will be described later, menstrual blood drawn to the absorber-side second high-density portion 5b is unlikely to move to the topsheet 2 side, so that the sanitary napkin 1 is seen from the topsheet 2 side. Excellent blood concealment.

  Moreover, each of the 1st pressing grooves 5 and 5 functions as a folding origin which deform | transforms the center part 20 so that it may protrude in the excretion part side. The 1st pressing grooves 5 and 5 function as a folding origin for making the center part 20 protrude and making the area | region 30 contact | abut on an excretion part.

  Here, as shown in FIG.1 and FIG.2, in the sanitary napkin 1, the 2nd pressing grooves 6 and 6 are formed in the part which overlaps with the 1st pressing grooves 5 and 5 in the surface sheet 2. FIG.

  The 2nd pressing grooves 6 and 6 as a surface sheet side groove part are the area | regions where the surface sheet 2 was formed in the groove shape dented on the absorber 4 side, respectively. Each of the second pressing grooves 6 and 6 is formed by compressing (squeezing) the absorbent body 4 in which the groove portions corresponding to the first pressing grooves 5 and 5 are formed in a state where the topsheet 2 is laminated. The The 2nd pressing grooves 6 and 6 are parts which constitute a part of leak-proof groove 60 which is a bowl-like ring as a whole.

  Each of the second pressing grooves 6 and 6 includes a plurality of topsheet-side high-density portions 6a that are intermittently formed so as to extend in the longitudinal direction Y. Specifically, each of the second pressing grooves 6, 6 has a plurality of topsheet-side high-density portions 6 a that are formed intermittently along the bottom of each of the second pressing grooves 6, 6. Specifically, as shown in FIG. 4, each of the second pressing grooves 6, 6 includes a top sheet-side high density portion 6 a that is alternately formed at the bottom of each of the second pressing grooves 6, 6, and the top sheet side. And a density portion 6b.

  The top sheet side high density portion 6 a is a portion that is laminated and disposed in contact with the absorber side first high density portion 5 a of the absorber 4. The top sheet side high density portions 6a are formed at the same intervals as the intervals at which the absorber side first high density portions 5a are formed.

  The top sheet side high density portion 6a has a wider interval than the average of the intervals at which the high density portions including the absorber side first high density portion 5a and the absorber side second high density portion 5b formed in the absorber 4 are formed. It is formed. Furthermore, the top sheet side high density portion 6 a is formed at the longest interval among the intervals between the high density portions formed on the absorbent body 4.

  The top sheet side high density portion 6a is formed integrally with the absorber side first high density portion 5a. Specifically, after disposing the topsheet 2 on the absorbent body 4 in which grooves corresponding to the first pressing grooves 5 and 5 are formed, regions corresponding to the grooves from the upper surface of the topsheet 2 in the laminated body at predetermined intervals. It is formed by compressing. The second pressing grooves 6 and 6 can be formed in the same manner as the first pressing grooves 5 and 5 described above. That is, the 2nd pressing grooves 6 and 6 corresponded to the 2nd pressing grooves 6 and 6 in the state where the surface sheet 2 and the absorber 4 in which the slot corresponding to the 1st pressing grooves 5 and 5 was formed were laminated. It can form by carrying out the compression (squeezing) process through between the embossing roll in which the convex-shaped part was formed, and a flat roll. Here, the point which is not limited to the combination of an embossing roll and a flat roll as a means to form the 2nd pressing grooves 6 and 6 is the same as that of the above-mentioned.

  Similar to the absorbent-side first high-density portion 5a of the first compressed grooves 5, 5, the topsheet-side high-density portion 6a is a strongly compressed (compressed) portion, and the topsheet-side medium-density portion 6b is weakly compressed. Part. The topsheet-side high density portion 6a is a portion on the topsheet 2 side in a portion formed by strongly pressing (compressing) a part of the topsheet 2 and the absorber 4. The top sheet-side high density portion 6a is a portion configured to increase the density of the material constituting the top sheet 2. Moreover, the surface sheet side high density part 6a is formed so that the density of each of the surface sheet 2 and the absorber 4 may be higher than that of the surface sheet side medium density part 6b.

  The top sheet side medium density portion 6b is a portion that is weakly compressed as described above. The surface sheet side intermediate density portion 6b is a region that is weakly compressed as a result of the adjacent surface sheet side high density portion 6a and the surface sheet side high density portion 6a being squeezed strongly. The surface sheet side medium density part 6b is formed so that the density of the material which comprises the surface sheet 2 is higher than an adjacent area | region, and each density is lower than the surface sheet side high density part 6a.

  As shown in FIG. 1, the 2nd pressing grooves 6 and 6 are formed in line symmetry with respect to the centerline CL. The width dimension which is the length in the width direction X of the 2nd pressing grooves 6 and 6 is 0.5 mm to 10 mm, for example, More preferably, it is 1 mm to 5 mm. When the width dimension of the 2nd pressing grooves 6 and 6 is smaller than 0.5 mm, the surface sheet 2 and the absorber 4 may cut along the 2nd pressing grooves 6 and 6 at the time of manufacture or use, or a surface sheet When the menstrual blood flowing along the surface of 2 cannot be sufficiently collected through the second squeezing grooves 6, 6, or the menstrual blood cannot be drawn sufficiently, the menstrual blood is outside in the width direction X. It may not be possible to prevent leakage. On the contrary, when the width dimension of the 2nd pressing groove 6 and 6 is larger than 10 mm, since the rigidity of the 2nd pressing groove 6 and 6 becomes high too much, the fitting property at the time of mounting | wearing and a usability | use_condition may fall.

  As shown in FIG. 4, here, the distance K1 between the top sheet side high density parts 6a in the second pressing grooves 6, 6 is the distance between the absorber side second high density parts 5b in the first pressing grooves 5, 5. It is formed so as to be wider than K2. The absorber-side second high-density portion 5b in the first compressed grooves 5, 5 is short so that menstrual blood that moves inside the absorber 4 to the outside in the width direction X together with the absorber-side first high-density portion 5a does not leak outside. Because they need to be drawn in time, they are formed close to each other. On the other hand, the second pressing grooves 6 and 6 are only required to be formed in a concave shape in order to stop the flow of menstrual blood traveling on the surface of the surface sheet 2, and the surface sheet-side high-density portion 6a flows into the recess. As long as it can be drawn within a predetermined time. Specifically, the interval K1 is, for example, 2 mm to 20 mm, more preferably 5 mm to 15 mm. When this interval K1 is smaller than 2 mm, the rigidity of the second squeezing grooves 6 and 6 may become too high and may not be deformed to fit the body when worn. On the contrary, when this space | interval K1 is larger than 20 mm, the menstrual blood which fell to the 2nd pressing grooves 6 and 6 along the surface of the surface sheet 2 may be unable to be drawn. In this case, menstrual blood that has fallen into the second pressing grooves 6 and 6 may leak further to the outside in the width direction X of the sanitary napkin 1 along the surface of the topsheet 2 before moving to the absorber 4.

  Each of the second compressed grooves 6, 6 functions as a leak-proof groove 60 that suppresses menstrual blood flowing along the surface of the topsheet 2 from leaking outside in the width direction X. Specifically, the second pressing grooves 6 and 6 collect menstrual blood flowing along the surface of the top sheet 2 by the recesses, and the top sheet side high-density part 6a formed at the bottom of the recesses By drawing the collected menstrual blood toward the absorber 4 side, menstrual blood is prevented from leaking outside in the width direction X.

  Moreover, as shown in FIG. 1, each of the 2nd pressing grooves 6 and 6 functions as a folding origin which deform | transforms the area | region 30 pinched | interposed into 2nd pressing grooves 6 and 6 so that it may protrude in the excretion part side. Specifically, the second squeezing grooves 6 and 6 are deformed so that the region 30 (center part 20) is brought into contact with the excretion part in cooperation with the first squeezing grooves 5 and 5.

  Moreover, each of the 2nd pressing grooves 6 and 6 functions as a mark which shows the area | region which is the leak-proof groove 60 visually recognizable from the outside, and can absorb menstrual blood. That is, the user's anxiety about leakage can be eliminated by making the user visually check the second compressed grooves 6 and 6. Also from this point, the 2nd pressing grooves 6 and 6 need to be formed in the width direction X at a certain amount of intervals.

Next, the structure of the first pressing grooves 5 and 5 and the second pressing grooves 6 and 6 will be described in more detail with reference to FIGS. 1 and 4.
First absorbent grooves 5 and 5 are formed in the absorber 4. Second pressing grooves 6 and 6 are formed on the topsheet 2 laminated on the absorbent body 4. The second pressing grooves 6 and 6 are formed to overlap the first pressing grooves 5 and 5 in the thickness direction Z.

  Absorber side first high density portions 5a and absorber side second high density portions 5b are formed at the bottoms of the first compressed grooves 5, 5. The absorber-side first high density portion 5a is formed at every interval K1. The absorber-side second high-density portion 5b is formed for each interval K2 that is narrower than the interval K1. Two absorber-side second high-density portions 5b are formed between the predetermined absorber-side first high-density portion 5a and the adjacent absorber-side first high-density portion 5a.

  A top sheet side high density portion 6 a is formed at the bottom of the second pressing grooves 6, 6. Since the top sheet side high density portion 6a is formed integrally with the absorber side first high density portion 5a, the top sheet side high density portion 6a is formed at every interval K1.

Each medium density part is formed between the high density parts.
An absorber-side first medium density portion 5c and an absorber-side second medium density portion 5d are formed at the bottom of the first pressing grooves 5, 5 formed in the absorber 4. The absorber-side first medium density portion 5c is formed between the absorber-side second high-density portion 5b and the absorber-side second high-density portion 5b. The absorber-side second medium density portion 5d is formed between the absorber-side first high-density portion 5a and the absorber-side second high-density portion 5b.

  At the bottom of the second pressing grooves 6, 6 formed in the top sheet 2, a top sheet side medium density portion 6 b is formed. The topsheet side medium density portion 6b is formed between a predetermined topsheet side high density portion 6a and the adjacent topsheet side high density portion 6a.

The positional relationship between the high density part and the medium density part on the absorber 4 side and the high density part and the medium density part on the topsheet 2 side will be described.
On the upper side in the thickness direction Z of the absorber-side first high-density portion 5a (in FIG. 4, the lower side is indicated as Z1 and the upper side is indicated as Z2), the topsheet-side high-density portion 6a is in contact with and laminated. Since they are arranged in contact with each other, menstrual blood collected on one side is easily transferred to the other side. Here, the absorber-side first high-density portion 5a and the topsheet-side high-density portion 6a are compressed and formed so as to be thin, and are joined (bonded) to each other. Thereby, even when menstrual blood is collected only in the absorber-side first high-density portion 5a and is not transferred to the topsheet-side high-density portion 6a, the red color of menstrual blood can be visually recognized from the outside.

  On the Z2 side (upper side) in the thickness direction Z of the absorber-side second high-density portion 5b, the topsheet-side medium density portion 6b is disposed. In the present embodiment, the bottom of the absorber-side second high-density portion 5b is disposed apart from the topsheet-side medium-density portion 6b. Thus, the menstrual blood is hardly transferred from the absorber-side second high-density part 5b to the topsheet-side medium-density part 6b. Even if they are in contact with each other, menstrual blood is unlikely to be transferred from the absorber-side second high-density portion 5b having a high density to the surface sheet-side medium-density portion 6b having a low density because of the density.

  On the Z2 side (upper side) in the thickness direction Z of the absorber-side first medium density portion 5c, the top sheet-side medium density portion 6b is in contact with and laminated. Since they are in contact with each other, menstrual blood collected on one side is generally easily transferred to the other side. Here, the density of the top sheet side medium density part 6b is lower than the density of the absorber side first medium density part 5c. Therefore, menstrual blood is not easily transferred from the absorber-side first medium density portion 5c to the topsheet-side medium density portion 6b.

  On the Z2 side (upper side) in the thickness direction Z of the absorber-side second medium density portion 5d, a portion from one end of the topsheet side medium density portion 6b to the end portion of the topsheet side high density portion 6a is abutted and laminated. Be placed. Since they are in contact with each other, menstrual blood collected on one side is generally easily transferred to the other side. Here, the density in the part from the end of the top sheet side medium density part 6b to the end part of the top sheet side high density part 6a is lower than the density of the absorber side second medium density part 5d. Therefore, menstrual blood is unlikely to be transferred from the absorber-side second medium density part 5d to the surface sheet-side medium density part 6b or the like.

Next, a method for manufacturing the sanitary napkin 1 will be described with reference to FIGS. 5 (A) to 5 (D).
5A is a perspective view of a part of the absorbent body 4, FIG. 5B is a perspective view of a part of the absorbent body 4 in which the first pressing groove 5 is formed, and FIG. It is a perspective view in the laminated body by which the surface sheet 2 was laminated | stacked on the absorber 4, (D) is a perspective view in the laminated body in which the 2nd pressing groove 6 was formed.

  First, the absorber 4 shown in FIG. 5 (A) is compressed by the above-described embossing roll. Thereby, as shown to FIG. 5 (B), the groove part corresponding to the 1st pressing groove 5 is formed in the one surface side in the absorber 4. FIG. A plurality of absorber-side second high-density portions 5b are formed at the bottom of the groove corresponding to the first compressed groove 5. By forming the plurality of absorber-side second high-density portions 5b, the region between the absorber-side second high-density portions 5b is also compressed so that the absorber-side first medium-density portion 5c is formed. The Thereby, the thickness in the area | region in which the groove part corresponding to the 1st pressing groove 5 was formed becomes thin.

  Next, as shown in FIG. 5C, the topsheet 2 is laminated and disposed on the absorbent body 4 in which the groove portions corresponding to the first compressed grooves 5 are formed. And it compresses with the above-mentioned embossing roll with respect to the laminated body by which the surface sheet 2 was laminated | stacked on the absorber 4. FIG. Thereby, the 2nd pressing groove 6 is formed in the outer surface side in the surface sheet 2, as shown in FIG.5 (D).

  A plurality of top sheet side high density portions 6 a are formed at the bottom of the second pressing groove 6. By forming the plurality of topsheet-side high-density portions 6a, the region between the topsheet-side high-density portions 6a (the portion constituting the bottom portion) is moved and compressed so as to be pulled, and the topsheet The side middle density portion 6b is formed. At the same time, a part of the absorber-side first medium density portion 5c is compressed when the topsheet-side high density portion 6a is formed, so that the absorber-side first high-density portion 5a or the absorber-side second medium density portion 5d Become.

  Here, the groove part corresponding to the 1st pressing groove 5 is arrange | positioned in the lower surface side in FIG. 5 of the area | region between surface sheet side high density parts 6a. That is, the area | region formed so that thickness may become thin is arrange | positioned in the compression direction in the area | region between surface sheet side high density parts 6a. Thereby, compared with the case where the groove part is not formed in the absorber 4, the compressive force applied to the area | region between surface sheet side high density parts 6a becomes small. For this reason, compared with the past, the surface sheet side intermediate density part 6b comprised with the low compression rate, the bulky, and low density is formed. Furthermore, the compression rate in the surface sheet side medium density part 6b as the surface sheet side medium density part is lower than the compression rate in the absorber side first medium density part 5c constituting a part of the absorber side medium density region 5e.

Next, the flow of menstrual blood excreted on the surface of the sanitary napkin 1 will be described with reference to FIGS. 6 and 7.
FIG. 6A to FIG. 6C are diagrams for explaining the flow of menstrual blood in a portion where the absorber-side first high-density portion 5a and the topsheet-side high-density portion 6a are stacked. FIG. 7A to FIG. 7C are diagrams illustrating the flow of menstrual blood in a portion where the absorber-side second high-density portion 5b and the top sheet-side medium-density portion 6b are stacked.

The flow of menstrual blood including the flow of menstrual blood in a portion where the absorber-side first high-density portion 5a and the topsheet-side high-density portion 6a are stacked is described with reference to FIGS. .
First, as shown in FIG. 6A, menstrual blood L is excreted so as to be dropped onto the surface of the sanitary napkin 1. The menstrual blood L excreted on the surface of the top sheet 2 passes through the top sheet 2 and is absorbed by the absorber 4. Then, menstrual blood L absorbed by the absorbent body 4 moves so as to spread outward in the width direction X.

  Next, as shown in FIG. 6 (B), menstrual blood L that has moved to the outside in the width direction X inside the absorbent body 4 is the first high-density portion 5a on the absorbent body side of the first squeezing grooves 5 and 5 and the first absorbent body side. 2 Pulled to the high density portion 5b. And the drawn menstrual blood L is the absorber side 1st medium density part 5c and the absorber side 2nd medium density part 5d (FIG. 6) adjacent to the absorber side 1st high density part 5a and the absorber side 2nd high density part 5b. (B) (not shown). In this way, menstrual blood L is prevented from leaking outside in the width direction X.

  Subsequently, as shown in FIG. 6C, the menstrual blood collected in the absorber-side first high-density portion 5a is in contact with the absorber-side first high-density portion 5a and is placed on the surface sheet side. The high density part 6a is transferred. That is, the menstrual blood absorbed by the absorber 4 is transferred to the top sheet side high density portion 6a via the absorber side first high density portion 5a, thereby being exposed to the outside.

The flow of menstrual blood including the flow of menstrual blood in a portion where the absorber-side second high-density portion 5b and the top sheet-side medium-density portion 6b are stacked is described with reference to FIGS. .
First, as shown in FIG. 7A, menstrual blood L is excreted so as to be dropped onto the surface of the sanitary napkin 1. The menstrual blood L excreted on the surface of the top sheet 2 passes through the top sheet 2 and is absorbed by the absorber 4. Then, menstrual blood L absorbed by the absorbent body 4 moves so as to spread outward in the width direction X.

  Next, as shown in FIG. 7B, menstrual blood L that has shifted to the outside in the width direction X inside the absorbent body 4 is the first high-density portion 5 a on the absorbent body side of the first compressed grooves 5 and 5, and the first on the absorbent body side. 2 Pulled to the high density portion 5b. And the drawn menstrual blood L is the absorber side 1st medium density part 5c and the absorber side 2nd medium density part 5d (FIG. 7) adjacent to the absorber side 1st high density part 5a and the absorber side 2nd high density part 5b. (B) (not shown). In this way, menstrual blood L is prevented from leaking outside in the width direction X.

  Subsequently, as shown in FIG. 7C, the top side in FIG. 7C of the absorber-side second high-density portion 5b that has collected menstrual blood has the top-sheet-side medium density portion 6b on the absorber-side side. 2 Stacked apart from the high density portion 5b. Thus, since the surface sheet side intermediate density part 6b on the surface sheet 2 side is separated from the absorber side second high density part 5b on the absorber 4 side, it was collected by the absorber side second high density part 5b. Menstrual blood is not transferred to the surface sheet 2 side. That is, menstrual blood collected by the absorber-side second high-density portion 5b is not transferred to the surface sheet 2 side and is covered by the surface sheet 2. When the sanitary napkin 1 is viewed from the surface sheet 2 side, the absorber-side second high-density portion 5b attracted by menstrual blood L is covered with the surface sheet 2, so that the red color of menstrual blood L is concealed from the outside. Yes.

  According to the present embodiment, since the number of the high density portions 6a on the topsheet side formed on the topsheet 2 side can be reduced, the number of places where menstrual blood is transferred from the absorber 4 side to the topsheet 2 side can be reduced. it can. Thereby, the discomfort by the redness of menstrual blood being visually recognized from the outside can be suppressed.

  Further, according to the present embodiment, the upper surface of the plurality of absorber-side second high-density portions 5b formed on the absorber 4 side is separated from the surface sheet-side intermediate density portion 6b formed on the surface sheet 2 side. Be placed. The menstrual blood collected in the absorber-side second high-density portion 5b is not transferred to the surface sheet 2 side, and menstrual blood collected in the absorber-side second high-density portion 5b is covered with the surface sheet 2. Thereby, the discomfort by the redness of menstrual blood being visually recognized from the outside can be suppressed.

  Moreover, according to this embodiment, since the collection function of menstrual blood is ensured in the absorber side 2nd high density part 5b, the space | interval of the surface sheet side high density parts 6a in the 2nd pressing grooves 6 and 6 is made. Can be wide. Thereby, the bending rigidity in the longitudinal direction Y of the sanitary napkin 1 can be lowered. In the wearing state, the sanitary napkin 1 can be flexibly deformed so as to follow the shape of the body. Moreover, the fitting property etc. at the time of wearing are improved.

  Moreover, according to this embodiment, since the some absorber side 2nd high density part 5b is formed in a narrow space | interval in the 1st pressing groove 5, 5, the surface sheet side formed in the 2nd pressing groove 6, 6 Even when the number of the high-density parts 6a is small and formed at wide intervals, the center part 20 is suitably deformed so as to protrude toward the excretion part side at the time of wearing.

  As mentioned above, although preferred embodiment of this form was described, this invention can be implemented with a various form, without being limited to embodiment mentioned above. In the present embodiment, each of the first pressing grooves 5 and 5 and the second pressing grooves 6 and 6 is formed as a pair, but is not limited thereto, and may be formed by three or more.

  In the present embodiment, the shape of the top sheet side high density portion 6a is not limited to a circular shape, and may be an arbitrary shape such as a square shape or a heart shape.

  Moreover, in this embodiment, although the 1st pressing grooves 5 and 5 are formed only in the part corresponding to the width direction outer side in the ellipse part which comprises the center part of the leak-proof groove 60, it is not limited to this, As shown in FIG. 8, the first squeezing grooves 5 and 5 of the sanitary napkin 1 </ b> A may be formed on the entire portion corresponding to the elliptical part constituting the central part of the leakage preventing groove 60. In this case, not only leakage on the outer side in the width direction of menstrual blood but also leakage on the outer side in the longitudinal direction can be suppressed. In this case, the menstrual blood is excellent in concealing ability when the menstrual blood is shifted in the longitudinal direction.

It is a top view of the sanitary napkin which concerns on one Embodiment of this invention. It is AA sectional drawing of a sanitary napkin. It is a top view of the absorber which comprises a sanitary napkin. It is sectional drawing of a 1st pressing groove and a 2nd pressing groove. (A) A perspective view of a part of the absorbent body, (B) a perspective view of a part of the absorbent body in which the first pressing groove is formed, (C) a perspective view of a laminated body in which a surface sheet is laminated on the absorbent body, D) It is a perspective view in the laminated body in which the 2nd pressing groove was formed. It is sectional drawing explaining the flow of the menstrual blood in the part by which the absorber side 1st high density part and the surface sheet side high density part were laminated | stacked, and shows the change of the menstrual blood in order from (A) to (C). . It is sectional drawing explaining the flow of the menstrual blood in the part by which the absorber side 2nd high density part and the surface sheet side middle density part were laminated | stacked, and shows the change of the menstrual blood in order from (A) to (C). . It is a top view of the sanitary napkin which concerns on other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Sanitary napkin 2 Top sheet 6 2nd pressing groove 6a Top sheet side high density part 6b Top sheet side medium density part 3 Back sheet 4 Absorber 5 1st pressing groove 5a Absorber side 1st high density part 5b Absorber side Second high density part 5e Absorber side medium density region
5c Absorber side first medium density part
5d Absorber side second medium density portion 10 Wing 20 Center portion 30 Region 60 Leakproof groove CL Center line

Claims (6)

An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between the top sheet and the back sheet,
An absorbent body side groove portion formed so as to be recessed in the surface sheet side of the absorbent body and extending in the longitudinal direction of the absorbent article;
The topsheet is formed so as to be recessed on the absorber side and the whole or part of the topsheet is arranged so as to overlap the absorber side groove, and
A plurality of absorber side first high density portions and absorber side second high density portions formed between the absorber side first high density portions are formed at the bottom of the absorber side groove portion, respectively.
The absorbent article in which the top sheet side groove portion is formed with a plurality of top sheet side high density portions that are arranged in contact with each of the plurality of absorber side first high density portions.   The absorptive article according to claim 1 constituted so that a space between said plurality of surface sheet side high-density parts may become longer than a space between said a plurality of absorber side 2nd high-density parts. Between the plurality of surface sheet side high density portions in the surface sheet, a surface sheet side medium density portion is formed with a compressive force weaker than compression in the surface sheet side high density portion,
Between the plurality of absorber side first high density portions in the absorber, an absorber side medium density region is formed with a compressive force weaker than compression in the absorber side first high density portion,
The absorptive article according to claim 1 or 2 which made the density of said surface sheet side middle density part lower than the density of said absorber side middle density field. The absorber-side medium density region is
The absorber-side first formed between the plurality of absorber-side second high-density portions in the absorber, and formed with a compressive force weaker than the compression in the absorber-side second high-density portion. Medium density part;
It is formed between the absorber-side first high-density portion and the absorber-side second high-density portion in the absorber, and has a compression force weaker than the compression in the absorber-side second high-density portion. The absorbent article of Claim 3 containing the formed absorber side 2nd medium density part.   The absorptive article according to claim 4 in which said top sheet side middle density part contacts said absorber side 1st middle density part from the front side.   The absorbent article according to any one of claims 3 to 5, wherein the top sheet side medium density part is separated from the absorber side second high density part and covers the absorber side second high density part from the front side. .