JP5043591B2 - Sanitary napkin - Google Patents

Description

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

  In absorbent articles such as sanitary napkins, the thickness of the central part of the absorbent body (the part located in the excretion area) is set to be greater than the peripheral part in order to improve leakage resistance by increasing the absorption capacity and improving fit. It is known to thicken and form a mid-high section. In addition, it is desired to further increase the absorption capacity for long-term use and use during periods with a large amount of excretion, and the middle and high parts are moved from the excretion area to the rear part (the part behind the excretion area). A sanitary napkin provided over a wide area has been developed (see, for example, Patent Document 1 below).

  In the absorbent article described in Patent Document 1, a pair of outer grooves (side embossing) is provided on the outer side in the width direction in the middle and high part extending from the excretion region to the rear part, and further, in the middle and high part in the rear part, Rear cross embossing is provided to connect the pair of outer grooves across the middle and high portions. And by providing this rear part cross-embossing, the liquid leakage prevention of the napkin longitudinal direction in the skin contact surface is achieved in the middle-high part in a rear part.

  However, in the absorbent article described in Patent Document 1, the rear transverse emboss is formed in the rear region farther from the excretion region, and it is not possible to suppress excessive liquid diffusion by the middle and high parts. Even if the rear cross embossing is formed in the rear region adjacent to the excretion region, since both ends thereof are connected to the pair of outer grooves, the diffusion of the liquid absorbed in the middle and high portions is inhibited by the rear cross embossing. Easy to be. Further, the presence of the rear cross embossing suppresses the diffusion of the liquid in the longitudinal direction, which easily causes lateral leakage.

JP 2001-95843 A

  Therefore, an object of the present invention is an absorbent article provided with a middle-high part extending from the excretion region to the rear part, an outer groove located outward in the width direction of the middle-high part and a leak-proof groove extending in the width direction at the rear part. The diffusion of the liquid absorbed in the middle and high parts does not occur excessively in the longitudinal direction, the influence of the liquid diffusion on the skin (due to transpiration, etc.) is suppressed, and the liquid diffusion is prevented by the leak-proof groove provided in the rear part. An object of the present invention is to provide an absorbent article that is less likely to be obstructed and that is less likely to cause side leakage at the rear part.

  The present invention is a vertically long absorbent article comprising a top sheet that constitutes a skin contact surface, a back sheet that constitutes a non-skin contact surface, and an absorber interposed between both sheets, Continuing from the excretion region of the absorbent article to the rear part, having a middle-high part thicker than the peripheral part, at least in the width direction outside of the middle-high part on the skin contact surface of the absorbent article, respectively, An outer groove that integrates the topsheet and the absorbent body is formed, and in the skin contact surface of the absorbent article, an intermediate groove that extends in the width direction of the absorbent article is near the rear end of the excretion region. Each end of the middle groove is formed, and the object is achieved by providing an absorbent article that is positioned outward in the width direction from the middle and high part and spaced from the outer groove. is there.

According to the absorbent article of the present invention, the absorbent article is provided with a middle-high part extending from the excretion region to the rear part, an outer groove located outward in the width direction of the middle-high part, and a leak-proof groove extending in the width direction at the rear part. In this case, the liquid absorbed in the middle and high parts does not excessively diffuse in the longitudinal direction, suppresses the influence on the skin due to liquid diffusion (due to transpiration, etc.), and the liquid leakage is prevented by the leakage prevention groove provided in the rear part. Diffusion is unlikely to be inhibited and side leakage is unlikely to occur in the rear part.

The absorbent article of the present invention will be described below with reference to the drawings based on the first embodiment which is a preferred embodiment thereof.
In the first embodiment, the present invention is applied to a sanitary napkin. As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the first embodiment includes a surface sheet 2 constituting a skin contact surface, It has a vertically long absorbent main body 10 provided with a back sheet 3 constituting a non-skin contact surface and an absorber 4 interposed between both sheets 2 and 3. A pair of side sheets 5 are arranged over substantially the entire length in the longitudinal direction of the absorbent main body 10 on both sides in the longitudinal direction on the skin contact surface side of the absorbent main body 10.
In the present specification, the “skin contact surface” means a surface that is arranged toward the wearer's skin when wearing, among both surfaces of each member, and the “non-skin contact surface” It means the opposite side of the contact surface. “Longitudinal direction” and “width direction” mean the longitudinal direction of the absorbent article and the width direction of the absorbent article, respectively, unless otherwise specified.

The sanitary napkin 1 of the present embodiment has an excretion area A that faces the excretion part of the wearer when worn, and a front part B and a rear part C that respectively extend before and after the excretion area A. The excretion area | region A is an area | region for absorbing the menstrual blood discharged | emitted from a vaginal opening, and is an area | region which covers a labia part centering on a vaginal opening at the time of wear. The front end of the excretion region A is located in a region corresponding to the area between the front of the labia and the pubic hill when worn, and does not exceed the position where the curvature of the body shape increases on the front (abdomen) side. The rear end of the excretion region A is located in a region corresponding to the region between the rear end of the labia and the anus when worn, and does not exceed the position where the curvature of the body shape starting from the vicinity of the anus becomes large on the back (dorsal) side. .
When the sanitary napkin 1 is worn, the front part B is arranged on the front (abdomen) side of the wearer, and the rear part C is arranged on the rear (back) side of the wearer.

  As shown in FIGS. 1 and 2, the top sheet 2 covers the entire region of the absorbent body 4 on the skin contact surface side. The back sheet 3 covers the entire region of the absorbent body 4 on the non-skin contact surface side, and further has a portion extending outward in the width direction from each side edge in the width direction of the absorbent body 4. The side sheet 5 also has a portion extending outward in the width direction from each side edge in the width direction of the absorber 4. The laminated body of the extended part in the side sheet 5 and the extended part in the back sheet 3 forms a side flap 6 on each outer side in the width direction of the absorbent main body 10.

The side flaps 6 bulge outwardly in the excretion area A and the rear part C, respectively, and form a pair of wing parts 61 and 61 and a pair of rear flaps 62 and 62, respectively. The wing portion 61 is folded back to the non-skin contact surface side when worn and is fixed to the outer surface (non-skin facing surface) of clothing such as shorts. The rear flap 62 is disposed on the inner surface (skin facing surface) of clothing such as shorts when worn.
Adhesives (not shown) are respectively applied to the center in the width direction on the non-skin contact surface side of the back sheet 3 and the non-skin contact surface side of the pair of wing portions 61, 61. A fixing portion for fixing the sanitary napkin 1 to shorts or the like is formed.

As shown in FIG. 1, the absorbent body 4 has a vertically long shape that is long in the longitudinal direction of the sanitary napkin 1, and has a middle-high part M that is thicker than the peripheral part. The middle and high parts M are continuous from the excretion area A of the sanitary napkin 1 to the rear part C. The middle and high portions M have a rectangular shape that is long in the longitudinal direction of the sanitary napkin 1. The hatched portion indicated by a broken line in FIG.
The middle-high portion M in the present embodiment is formed from a multilayer portion having a multilayer structure. The middle and high portions M are located inward in both the longitudinal direction and the width direction of the absorber 4, in other words, formed in the central portion of the absorber 4.
As shown in FIGS. 1 and 2, the absorbent body 4 includes a main absorbent body 41 disposed from the front part B to the rear part C, and the excretion area A to the rear part C (specifically, an abbreviation of the rear part C). And an auxiliary absorber 42 arranged over the central portion.

  As shown in FIG. 2, the main absorbent body 41 is composed of a lower absorbent body 41A and an upper absorbent body 41B disposed on the skin contact surface side of the lower absorbent body 41A. Both the lower absorbent body 41 </ b> A and the upper absorbent body 41 </ b> B have a vertically long shape that is long in the longitudinal direction of the sanitary napkin 1.

As shown in FIGS. 1 and 2, the auxiliary absorbent body 42 is a smaller absorbent body than the main absorbent body 41, has a vertically long shape in the longitudinal direction of the sanitary napkin 1, and is rearward from the excretion region A. Over the part C, it is disposed between the lower absorbent body 41A and the upper absorbent body 41B. Thus, by arranging the auxiliary absorber 42 in the main absorber 41, the absorption capacity of the absorber 4 can be partially and easily increased.
In addition, when the auxiliary absorber 42 is sandwiched between the lower absorber 41A and the upper absorber 41B, a large step near the boundary between the portion where the auxiliary absorber 42 is interposed and the outer portion. Does not occur, and the center of gravity in the thickness direction is located substantially at the center in the thickness direction, so that twisting is less likely to occur.

  As shown in FIG. 2, the auxiliary absorbent body 42 is formed by folding a single rectangular absorbent sheet. Specifically, both side regions along the longitudinal direction of the sanitary napkin 1 in the absorbent sheet are folded back to the surface sheet 2 side, and the edge portions of the folded portions are at the center in the width direction of the absorbent sheet. They are superimposed.

Between the lower absorber 41A and the upper absorber 41B, the portion where the auxiliary absorber 42 is not interposed has a two-layer structure, whereas the portion where the auxiliary absorber 42 is interposed is four. It is a multilayer part with a layer structure.
Note that the lower absorbent body 41A and the upper absorbent body 41B may or may not be joined to each other at a site where the auxiliary absorbent body 42 is not interposed. Further, even in the portion (multilayer part) where the auxiliary absorber 42 is interposed, the lower absorber 41A and the auxiliary absorber 42 and the upper absorber 41B and the auxiliary absorber 42 are joined. Or may not be joined.

  Next, the outer groove 7 will be described. As shown in FIG.1 and FIG.2, the outer groove | channel 7 which integrates the surface sheet 2 and the absorber 4 at least in the width direction outward of the middle-high part M in the skin contact surface of the absorptive main body 10, respectively. Is formed. The outer groove 7 extends substantially in the longitudinal direction of the absorbent main body 10, and a portion of the excretion region A adjacent to the middle / high portion M has a shape that curves inward in the width direction. A portion adjacent to the portion M has a shape that curves outward in the width direction. Both the outer grooves 7 are connected to each other at their rear ends via a rear groove 7A, and are connected to each other at their front ends via an inner front groove 7C and an outer front groove 7D.

The rear groove 7A has a substantially U shape that opens to the front side. The length of the rear groove 7A (the length measured between the front end portion and the rear end portion along the longitudinal direction of the sanitary napkin 1) is preferably 15 to 40 mm.
Further, the inner front groove 7C and the outer front groove 7D have a substantially U-shape opened rearward, and the inner front groove 7C is located on the inner side and the outer front groove 7D is located on the outer side. Forming a structure.

  In the outer groove 7, it is only necessary that the surface sheet 2 is continuously depressed to such an extent that the surface sheet 2 and the absorber 4 are integrated, and the absorber 4 is not necessarily recessed. However, from the viewpoint of stabilizing the integration of the topsheet 2 and the absorbent body 4, it is preferable that the absorbent body 4 has a compression portion partially formed at a position corresponding to the outer groove 7. From the viewpoint of leakage prevention, diffusion and flexibility, it is more preferable that the recesses having different depths are formed at positions corresponding to the outer grooves 7.

The rear end M1 of the middle-high part M is located beyond the bending start position on the rear side of the body and in the groove of the buttocks from the viewpoint of ensuring absorbability and fit to the body shape even when the wearer is used for a long time. It is preferable that the position does not exceed the upper limit, and it is more preferable that the position does not reach the pubic bone. Specifically, from the viewpoint of covering the body groove shape, the rear end portion M1 of the middle and high portion M is preferably located within a range of 2 to 15 cm from the curved top portion of the middle groove 8, and is easily fitted to the body groove. From the viewpoint, it is more preferable to be located within a range of 5 to 10 cm from the curved top of the middle groove 8.
Further, from the same viewpoint, when the wing portion 61 is provided as in the first embodiment, the rear end portion M1 of the middle / high portion M is used to prevent lateral leakage from the rear end position 61a of the wing portion 61. However, it is preferably located in the vicinity of the rear flap 62, and more preferably located in the widest portion of the rear flap 62.

  The total length of the absorbent body 4 (length in the longitudinal direction of the sanitary napkin 1) is preferably 170 to 370 mm, and the width of the absorbent body 4 (length in the width direction of the sanitary napkin 1) is preferably 60 to. 90 mm. Further, the overall length of the middle-high portion M (length in the longitudinal direction of the sanitary napkin 1) is preferably 100 to 300 mm, and the width of the middle-high portion M (length in the width direction of the sanitary napkin 1) is preferably 30-50 mm. The ratio of the total length of the absorber 4 and the middle-high part M (absorber: middle-high part) is preferably 1: 0.35 to 1: 0.81, and the ratio of the width of the absorber 4 to the middle-high part M (Absorber: Middle-high portion) is preferably 1: 0.3 to 1: 0.84.

In the absorbent body 4, the basis weight in the middle and high part M is preferably 100 to 500 g / m ² , and the basis weight in the peripheral part of the middle and high part M is preferably 80 to 240 g / m ^2. The ratio of the amounts (middle / high / periphery of the middle / high) is preferably 1.1 to 6.3, more preferably 1.5 to 3.
In the absorber 4, the thickness in the middle-high part M is preferably 0.5 to 5 mm, and the thickness in the peripheral part of the middle-high part M is preferably 0.5 to 3 mm. The ratio (the former / the latter) of the thickness at the middle-high portion M and the thickness at the peripheral portion of the middle-high portion is preferably 1.1 to 5, more preferably 1.5 to 3. When the thickness in the peripheral part of the middle-high part M is thin, a sense of incongruity hardly occurs at the time of wearing.

  In the absorber 4, the rigidity in the middle and high part M is preferably 30 to 50 cN, and the rigidity in the rear end part M1 of the middle and high part M is preferably 15 to 40 cN. The rigidity ratio of the two (medium / high part / back part of the middle / high part) is preferably 1.0 to 1.5, more preferably 1.0 to 1.4, and particularly preferably 1.1 to 1.3. is there. The difference in rigidity between the two (the middle-high portion-the rear end portion of the middle-high portion) is preferably 10 cN or less, more preferably 8 cN or less.

The rigidity here is measured as follows.
Daiei Kagaku Seisaku Seisakusho Co., Ltd., which conforms to the stiffness measurement method specified in JIS L1096 (General Textile Test Method) in a test room with a temperature of 23 ° C. and a humidity of 50%, uses a handometer tester. . Place the test piece on the sample table adjusted to 30 mm between the slots so that the measurement site of the test piece is located at the center between the slots and the length of the test piece along the longitudinal direction of the absorber is orthogonal to the slot. It is arranged horizontally so that it coincides with the direction. Do not fix the specimen on the sample stage. A blade adjusted so as to descend to a position (lowermost position) 8 mm below the surface of the sample stage is lowered from above the test piece at a constant speed of 200 mm / min. Then, the maximum value (cN) indicated by the indicator (load meter) when the test piece is pressed back and forth in the length direction is read. The measurement was performed 5 times, and the average value was calculated as the stiffness value.

  In addition, about a test piece, it takes out so that an absorber may not be damaged from the absorbent article left to stand at room temperature without carrying out preliminary drying especially, width: 75mm, length: 270mm, and both ends of a longitudinal direction are semicircle A sample having a shape was obtained and used as a test piece. In this case, it is preferable to exclude materials other than the absorber as much as possible. However, in order not to damage the absorber, the absorber is used for joining a part of the top sheet, a part of the back sheet, or the top sheet and the back sheet. The adhesive may be partially attached. Further, when the widths of the test pieces are different, the rigidity value is converted into 75 mm width and adjusted. The absorber can be measured if its length is 50 mm or more (between slots: 30 mm + both ends: 10 mm each) (no conversion is necessary).

The thickness of the absorber is measured by using the absorber taken out so as not to break, as in the case of the rigidity measurement sample, but does not contain any material other than the absorber such as the topsheet, backsheet, and adhesive. Measure with
The thickness is measured using a thickness meter “PEACOCK UPRIGHT DIAL GUAGE No. 207” manufactured by Ozaki Mfg. Co., Ltd. under a load of 2.5 g / cm ² . The measurement was performed on five samples, and the average value was calculated as the thickness.

Next, the middle groove 8 will be described. On the skin contact surface, an intermediate groove 8 extending in the width direction of the sanitary napkin 1 is formed in the vicinity of the rear end in the excretion region A. “Near rear end in excretion area A” means an area within 10 mm, preferably within 5 mm from the boundary between excretion area A and rear part C toward excretion area A.
Both end portions 81 of the middle groove 8 are positioned outward in the width direction from the middle and high portion M and are separated from the outer groove 7. The distance L1 [see FIG. 3 (b)] between the end 81 of the middle groove 8 and the side edge of the middle high portion M is a value measured along the width direction of the sanitary napkin 1, and preferably 1 to 8 mm. Preferably it is 2-5 mm. The distance L2 between the end portion 81 of the middle groove 8 and the outer groove 7 (see FIG. 3A) is a value measured along the width direction of the sanitary napkin 1, preferably 1 to 7.5 mm, more preferably It is 3.5 to 6.5 mm.

The middle groove 8 is curved rearward. If the middle groove 8 is curved, the liquid tends to gather near the apex. The thickness L4 [see FIG. 3B] of the middle groove 8 is preferably 2 to 4 mm. The entire length of the curved middle groove 8 (length in the longitudinal direction of the sanitary napkin 1) L5 (see FIG. 3B) is preferably 5 to 20 mm. The width of the entire middle groove 8 (length in the width direction of the sanitary napkin 1) L6 (see FIG. 3B) is preferably 37 to 51 mm.
Both end portions 81 of the middle groove 8 are located in front of the rear end portion M1 of the middle and high portion M. The distance (the shortest distance in the longitudinal direction of the sanitary napkin 1) between the rear end M1 of the middle and high part M and the middle groove 8 is preferably 20 to 200 mm, more preferably 40 to 140 mm.

  The middle groove 8 is a compressed groove (continuous linear shape) extending in the width direction of the sanitary napkin 1. The compressed groove may be, for example, a form in which continuous grooves are formed in both the top sheet 2 and the absorbent body 4, and the continuous sheet is formed in the top sheet 2, but the absorbent body 4 is compressed. It may be a form having a part that is present and a part that is not compressed (that is, a broken line shape). The shape of the compressed portion of the absorbent body 4 is preferably a shape that is long in the direction in which the middle groove 8 extends from the viewpoint of imparting rigidity and moderate diffusibility, and specifically, an ellipse, a rectangle, and the like. It is preferable.

The middle groove 8, the outer groove 7, the rear groove 7A, the inner front groove 7C, and the outer front groove 7D (the same applies to the outer rear groove 7B described later) can be formed by, for example, the heat embossing method as follows. That is, a heat provided with an embossing roll having a protruding portion having a shape corresponding to the middle groove 8 or the grooves 7, 7A, 7C, and 7D on the peripheral surface, and a receiving roll disposed to face the peripheral surface of the embossing roll. Use an embossing device. The laminated body of the absorber 4 and the top sheet 2 is inserted between both rolls so that the top sheet 2 side is positioned on the embossing roll side. Then, the intermediate groove 8 or the grooves 7, 7A, 7C, 7D are formed by integrally heating and pressurizing them.
These middle grooves 8 and grooves 7, 7A, 7C, and 7D can be formed by an ultrasonic embossing method, a high-frequency embossing method, or the like in addition to the heat embossing method.

As a material which comprises each part of the sanitary napkin 1 of this embodiment, what is normally used in the said technical field can be especially used without a restriction | limiting.
For example, as the surface sheet 2, a hydrophilic and liquid-permeable nonwoven fabric or an apertured film can be used.
As the back sheet 3, a liquid-impermeable material or a water-repellent material can be used. As the liquid-impermeable material, a resin film, a laminate material of a resin film and a nonwoven fabric, or the like can be used. Nonwoven fabrics, spunbonded nonwoven fabrics, heat bonded nonwoven fabrics, air-through nonwoven fabrics and the like can be used.
As the side sheet 5, the same sheet as the back sheet 3 can be used.

As the main absorbent body 41, a fiber aggregate made of pulp fibers or the like, or a fiber aggregate and a water absorbent polymer (mixed product of water absorbent polymer and fiber material) can be used.
Examples of water-absorbing polymers include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride) copolymer. Examples thereof include a polymer and a saponified product thereof, and polyaspartic acid.
Examples of the fibers constituting the main absorbent body 41 include hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers, and cellulose acetate, polyolefin fibers such as polyethylene and polypropylene, and condensation fibers such as polyester and polyamide. I can.
The water-absorbing polymer and the fiber can be used alone or in combination of two or more.

  The auxiliary absorbent body 42 (the absorbent sheet) is the same as that of the main absorbent body 41, an absorbent sheet carrying an absorbent polymer or pulp between two non-woven fabrics or paper, and JP-A-8-246395. The absorptive sheet etc. which are described in the gazette can be used.

The sanitary napkin 1 according to the first embodiment has the following effects.
In the sanitary napkin 1 of the first embodiment, the absorbent body 4 has a middle-high portion M that extends from the excretion region A to the rear portion C, and is outward in the width direction of the middle-high portion M on the skin contact surface. An outer groove 7 is formed in the inner surface. Therefore, the absorption capacity of the absorber 4 can be sufficiently secured, suitable for long-time use or use in a time zone with a large amount of excretion, and has a high ability to prevent side leakage at the rear portion C.

Moreover, the middle groove | channel 8 extended in the width direction is formed, and the both ends 81 of the middle groove 8 are each located in the width direction outer side rather than the middle-high part M, respectively. Therefore, the middle groove 8 can effectively suppress (shut off) the liquid that moves the middle and high portions M in the longitudinal direction. Furthermore, since the middle and high portions M can be pressed and integrated by the middle groove 8, it is possible to prevent the middle and high portions M from swelling and floating.
Further, since both end portions 81 of the middle groove 8 are separated from the outer groove 7, it is possible to ensure the diffusivity in the longitudinal direction of the liquid, and thus prevent the side leakage due to the low diffusibility in the longitudinal direction of the liquid. be able to.

  Next, other embodiment of the absorbent article of this invention is described. In the other embodiments, differences from the first embodiment described above will be mainly described, and the same points are denoted by the same reference numerals and description thereof will be omitted. For the points that are not particularly described, the description of the first embodiment is applied as appropriate. In other embodiments, the same effects as those of the first embodiment can be obtained.

  FIG. 4 shows an intermediate groove and its peripheral portion in the sanitary napkin of the second embodiment of the absorbent article of the present invention. As shown in FIG. 4, the sanitary napkin 1 of the second embodiment differs from the first embodiment in the shape of the intermediate groove 8 in plan view. Specifically, in the first embodiment, the intermediate groove 8 is a continuous linear compression groove extending in the width direction of the sanitary napkin 1, whereas in the second embodiment, the width of the sanitary napkin 1. It consists of a compressed groove in a broken line shape (including an aggregate of dots) extending in the direction. The compressed groove has, for example, a broken-line groove formed in both the top sheet 2 and the absorbent body 4 (the top sheet 2 and the absorbent body 4 have a compressed portion and a non-compressed portion. Or a form in which a dashed-line groove is formed only in the top sheet 2 (the compressed portion of the absorber 4 does not exist).

In the second embodiment, the middle groove 8 has one non-continuous portion 82 at the center thereof and is divided into two. As in the second embodiment, in the form in which only one discontinuous portion 82 exists in the central portion of the middle groove 8, the width (length in the width direction of the sanitary napkin 1) L7 of the discontinuous portion 82 is preferably Is 2 to 15 mm.
According to the second embodiment, compared to the first embodiment, the presence of the discontinuous portion 82 improves the diffusivity in the longitudinal direction of the liquid in the middle and high portions M.

FIG. 5 shows an intermediate groove and its peripheral part in the sanitary napkin of the third embodiment of the absorbent article of the present invention. As shown in FIG. 5, the sanitary napkin 1 according to the third embodiment differs from the second embodiment in the number of discontinuous portions 82 in the middle groove 8. Specifically, in the second embodiment, only one non-continuous portion 82 is present at the center portion of the middle groove 8, whereas in the third embodiment, the middle groove 8 is formed on the sanitary napkin 1. There are four such that it is divided into 5 minutes in the width direction.
In the form in which a plurality of non-continuous portions 82 are present in the middle groove 8 as in the third embodiment, the width (length in the width direction of the sanitary napkin 1) L7 of one non-continuous portion 82 is preferably The total width (L7 × number) of the discontinuous portions 82 is preferably 8 to 20 mm.
In addition, the number of the non-continuous parts 82 can be formed, for example, 2 to 7 per one middle groove 8.

  As shown in FIG. 6 (a), the intermediate groove 8 made of a broken-line-shaped compressed groove, such as the intermediate groove 8 in the third embodiment and the second embodiment, has alternating high pressure parts 83 and low pressure parts 84. It may be formed, and as shown in FIG.6 (b), the high pressing part 83 and the non-squeezing part 85 may be formed alternately. The high-pressure squeezed portion 83 is a portion that is squeezed more strongly than the low-pressure squeezed portion 84 during embossing, and therefore has a smaller thickness than the low-pressure squeezed portion 84. The non-squeezed portion 85 is a portion that is not substantially squeezed during embossing.

  FIG. 7 is a plan view of a sanitary napkin according to a fourth embodiment of the absorbent article of the present invention, and FIG. 8 shows an intermediate groove and its peripheral portion in the sanitary napkin according to the fourth embodiment. As shown in FIGS. 7 and 8, the sanitary napkin 1 of the fourth embodiment differs from the first embodiment in the shape of the middle-high part M (MC) in the rear part C and in the rear part C. The main difference is that an outer rear groove 7B is further provided outside the outer groove 7 to form a double groove structure.

Specifically, as illustrated in FIG. 7, the middle-high portion MC in the rear portion C has a tapered shape that is tapered toward the rear. In addition, on the skin contact surface, outer rear grooves 7B different from the outer grooves 7 are respectively provided on the outer sides in the width direction of the tapered portions in the middle and high parts MC of the rear part C.
In 4th Embodiment, the both ends 81 of the middle groove | channel 8 pass the outermost edge of the middle-high part M (MA) in the excretion area | region A, and rather than the virtual straight line (not shown) extended in the longitudinal direction of a sanitary napkin. It is located outward in the width direction.
According to the fourth embodiment, the same effect as that of the first embodiment is achieved, and the outer rear groove different from the outer groove 7 is formed outward in the width direction of the tapered portion in the middle and high part MC of the rear part C. Since 7B is provided, the side leakage prevention property in the rear part C is further improved.

As mentioned above, although each embodiment of the absorbent article of this invention was described, this invention is not restrict | limited to each embodiment mentioned above, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, the outer groove 7 may be formed only in the excretion region A and the rear part C, or may be formed from the front part B to the rear part C.

The inner rear groove 7A, the outer rear groove 7B, the inner front groove 7C, and the outer front groove 7D are not necessarily provided.
In the embodiment described above, the auxiliary absorbent body 42 is disposed between the lower absorbent body 41A and the upper absorbent body 41B to form the middle-high part M, but the non-skin contact surface side of the lower absorbent body 41A ( The middle and high portions M can also be formed by being disposed on the skin contact surface side (between the upper absorbent body 41B and the top sheet 2) of the upper absorbent body 41B (between the lower absorbent body 41A and the back sheet 3). .
The absorber 4 can be formed from a single-layer structure in which the thickness corresponding to the middle and high portions M is partially thickened.

  In the absorber 4, the portions other than the middle and high portions M have a two-layer structure including the lower absorber 41A and the upper absorber 41B in the above-described embodiment, but may have a single-layer structure. Further, the middle and high portions M are not limited to a four-layer structure, and may be a two-layer, three-layer, or five-layer stack structure. The difference in the number of layers between the middle and high portions M and other portions is not limited to two layers, and may be one layer or three or more layers.

It is also possible to omit the side sheet 5 and form the skin contact surface from the top sheet 2. Further, the side sheet 5 is made of a material that can be expanded and contracted, or a thread-like or belt-like elastic member (for example, thread rubber or flat rubber) is disposed in the vicinity of the inner edge of the side sheet 5, and the elastic member is attached to the inner edge. The pockets can be easily formed (opened) by being sandwiched between the side sheets 5 folded back at the portion.
The wing portion 61 and / or the rear flap 62 may not be provided.
Each composition in each embodiment can be combined suitably.
The absorbent article of the present invention is not limited to sanitary napkins, and can be applied to panty liners (origami sheets), incontinence pads, and the like.

FIG. 1 is a plan view of a sanitary napkin that is a first embodiment of the absorbent article of the present invention. 2 is a cross-sectional view taken along line XX shown in FIG. 3 (a) and 3 (b) are partial enlarged views showing a middle groove and its peripheral portion in the sanitary napkin shown in FIG. FIG. 4 is a partially enlarged view (corresponding to FIG. 3 (a)) showing a middle groove and its peripheral part in a sanitary napkin which is the second embodiment of the absorbent article of the present invention. FIG. 5A is a partially enlarged view (corresponding to FIG. 3A) showing an intermediate groove and its peripheral portion in a sanitary napkin which is the third embodiment of the absorbent article of the present invention, and FIG. These are figures which show the inner groove. FIG. 6A and FIG. 6B are cross-sectional views showing the cross-sectional shapes of the broken-line compressed grooves, respectively. FIG. 7 is a plan view of a sanitary napkin that is a fourth embodiment of the absorbent article of the present invention. FIG. 8 is a partially enlarged view showing the middle groove and its peripheral part in the sanitary napkin of the fourth embodiment.

Explanation of symbols

1 Sanitary napkin (absorbent article)
2 Top Sheet 3 Back Sheet 4 Absorber 41 Main Absorber 41A Lower Absorber 41B Upper Absorber 42 Auxiliary Absorber 5 Side Sheet 7 Outer Groove 8 Middle Groove 81 End A Excretion Area B Front Part C Rear Part M Middle High Part

Claims (2)

A top sheet that forms the skin contact surface, a back sheet that forms the non-skin contact surface, and an absorber interposed between the two sheets , an excretion region that faces the excretion portion of the wearer when worn, and the excretion region A vertically-long sanitary napkin having a front part and a rear part extending in the front-rear direction ,
The absorber is continuous over from the excretion area of the sanitary napkin products in the rear portion, has a thick domed section thickness than the peripheral portion,
On the skin contact surface of the sanitary napkin , at least on the outer side in the width direction of the middle and high parts, outer grooves for integrating the top sheet and the absorber are formed, respectively.
On the skin contact surface of the sanitary napkin , an intermediate groove extending in the width direction of the sanitary napkin is formed in the vicinity of the rear end of the excretion region. Become
Said end portion of the middle groove, respectively, the spaced apart position to and from the outer groove outward in the width direction than the domed section, and the outermost edge of the street and the absorbent article of the domed portion in the excretion area It is located outward in the width direction from the virtual straight line extending in the longitudinal direction,
The absorber is composed of a main absorber disposed from the front portion to the rear portion, and an auxiliary absorber disposed from the excretion region to the rear portion,
The main absorbent body is composed of a lower absorbent body and an upper absorbent body disposed on the skin contact surface side of the lower absorbent body, and the auxiliary absorbent body is composed of the lower absorbent body and the upper absorbent body. Between them,
The auxiliary absorbent body is formed by folding a rectangular absorbent sheet, and both side regions of the absorbent sheet along the longitudinal direction of the sanitary napkin are folded back to the top sheet side and folded. It is formed by overlapping the edge portions of the portions at the center in the width direction of the absorbent sheet,
Between the lower absorber and the upper absorber, the portion where the auxiliary absorber is not interposed is a two-layer structure, and the portion where the auxiliary absorber is interposed is a multilayer portion of a four-layer structure. And
In the absorbent body, a sanitary napkin having a thickness of 0.5 to 5 mm at the mid-high portion and a thickness of 0.5 to 3 mm at a peripheral portion of the mid-high portion . The middle and high portions in the rear portion have a tapered shape that is tapered toward the rear.
In the skin contact surface of the sanitary napkin, outward in the width direction of the tapered portion in the middle height section, the outer groove another outer rear grooves claim 1 Symbol placement of the sanitary napkin are provided and.

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