JP7085362B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article.

Conventionally, as absorbent articles such as menstrual napkins, panty liners, and incontinence pads, those provided with a main body in which an absorber is provided between a front surface sheet and a back surface sheet are known. In such an absorbent article, a squeeze groove extending in the longitudinal direction at intervals in the width direction in order to facilitate deformation of the absorbent article corresponding to the shape of the body and to control the transfer of body fluid. Is known to be provided in pairs.

For example, Patent Document 1 discloses an absorbent article having a pair of first squeezing grooves extending in the longitudinal direction and a pair of second squeezing grooves arranged outside the first squeezing groove in the width direction. There is. Further, in Patent Document 2, a first flexible shaft and a second flexible shaft spaced outside the first flexible shaft are provided at positions separated from the center line extending in the vertical direction on both the left and right sides. Absorbent articles, each elongated in the longitudinal direction, are disclosed.

Japanese Patent No. 5766254 Japanese Patent No. 4180865

In absorbent articles, especially when it is necessary to cope with the discharge of a large amount of body fluid, the body fluid is not absorbed only in the central region where the body fluid is directly discharged, but also in the posterior region by transferring the body fluid backward. It is preferable to absorb and also utilize the absorber in the posterior region.

In the configuration disclosed in Patent Documents 1 and 2 described above, it is easy to guide the body fluid from the central region to the rear along the squeezing groove extending in the longitudinal direction. However, since the squeezed groove is a portion where the density is increased, the absorption capacity (the amount of body fluid that can be absorbed) of the absorber in the squeezed groove and the regions on both sides thereof is lower than that in the unsqueezed region. In the configuration disclosed in Patent Documents 1 and 2, since such a squeezing groove continuously extends from the central region to the posterior region, the body fluid induced backward is sufficiently absorbed in the posterior region. And there were cases where it could not be diffused. For this reason, there was a possibility that the body fluid could not continuously and smoothly move backward from the central region, but stayed in the central region and leaked from the side.

In view of the above points, it is an object of the present invention to provide an absorbent article capable of satisfactorily absorbing and diffusing body fluid in the posterior region and preventing leakage.

The first aspect of the present invention is an elongated body having a liquid-permeable front surface sheet, an impermeable back surface sheet, and an absorber provided between the front surface sheet and the back surface sheet. A pair of absorbent articles provided, comprising a longitudinally extending squeeze groove, the squeeze groove provided in a central region including a region corresponding to the wearer's body fluid outlet when worn. The central squeezing groove and the pair of posterior first squeezing grooves provided behind the pair of central squeezing grooves are included, and the front end of the rear first squeezing groove is from the rear end of the central squeezing groove in the width direction. It is located inward, in the longitudinal direction, at the same position as the rear end of the central squeeze groove or at the rear.

According to the first aspect, the front end of the posterior first squeezed groove is located inward in the width direction from the rear end of the central squeezed groove and at the same position as the rear end of the central squeezed groove in the longitudinal direction. Since it is located further rearward, the first posterior squeezing groove and the central squeezing groove are discontinuous. Therefore, the body fluid guided backward along the pair of central squeezing grooves can be diffused at least partially radially from the rear end to the periphery of the pair of central squeezing grooves. Further, since the front end of the rear first squeezing groove is inside in the width direction of the rear end of the central squeezing groove, the front side region of the pair of rear first squeezing grooves can be widened, and the front side region thereof can be widened. Since the body fluid can be absorbed, the absorber in the posterior region can be used more effectively. Further, since the posterior first squeezing groove and the central squeezing groove do not overlap in the longitudinal direction, the body fluid is more likely to diffuse from the rear end of the central squeezing groove to the periphery. As described above, since the absorption and diffusion of the body fluid in the posterior region are performed well, the transfer of the body fluid from the central squeezing groove can be performed more smoothly, and leakage and the like can be prevented.

In the second aspect of the present invention, each of the pair of posterior first squeezing grooves is curved inward in the width direction.

According to the second aspect, each posterior first squeezing groove is curved so as to be convex inward. As a result, the absorbent article can be deformed into a shape suitable for the groove of the buttocks, which gradually becomes deeper and shallower again as it goes backward.

In the third embodiment, the widthwise distance between the rear end of the central squeezing groove and the front end of the rear first squeezing groove is 2 to 10 mm on each side of the center line extending in the longitudinal direction. ..

According to the third aspect of the present invention, the distance in the width direction between the rear end of the central squeezing groove and the front end of the rear first squeezing groove is set to a predetermined value. As a result, the range in which the body fluid can be diffused from the rear end of the central compression groove can be expanded to promote the diffusion and absorption of the body fluid, while the body fluid diffused from the rear end of the central compression groove can be drawn by the posterior first compression groove. It is possible to secure a possible interval.

In the fourth aspect of the present invention, the minimum widthwise distance between the pair of posterior first squeezing grooves is 7.5 to 15 mm.

According to the fourth aspect, the minimum distance in the width direction between the pair of rear first squeezing grooves is set as a predetermined value. As a result, the area between the pair of rear first squeezing grooves can be easily entered by the groove in the buttocks, and the fit is improved. Can be prevented.

In the fifth aspect of the present invention, the widthwise distance between the rear ends of the pair of rear first squeezing grooves is 10 to 35 mm.

According to the fifth aspect, the distance in the width direction between the rear ends of the pair of rear first squeezing grooves is set to a predetermined value. As a result, it is possible to prevent the main body from becoming stiff due to excessive proximity of the posterior first squeezing grooves to each other, and the body fluid guided along the posterior first squeezing groove spreads too much outward in the width direction in the rear. It can be prevented.

In the sixth aspect of the present invention, the rear ends of the pair of central squeezing grooves are each curved inward in the width direction.

According to the sixth embodiment, since the rear ends of the pair of central squeezing grooves are curved inward in the width direction, the body fluid guided from the central region is located inside in the width direction of the central squeezing groove. It becomes easier to convey to the rear first squeezing groove.

In the seventh aspect of the present invention, a pair of squeezing portions are provided, and each of the squeezing portions is provided on the side of the pair of rear first squeezing grooves.

According to the seventh aspect, the pair of squeezing portions can give stiffness to the region outside the width direction of the pair of rear first squeezing grooves. Therefore, when the main body is deformed so that the region between the pair of rear first squeezing grooves rises when the absorbent article is attached, the above deformation can be maintained satisfactorily.

According to one embodiment of the present invention, it is possible to provide an absorbent article capable of satisfactorily absorbing and diffusing body fluid in the posterior region and preventing leakage.

It is a partially broken view of the absorbent article by one embodiment of this invention. FIG. 3 is a sectional view taken along line I-I of an absorbent article according to an embodiment of the present invention. It is an enlarged view which shows the state of the diffusion in the posterior region in one embodiment of this invention. It is a figure which shows the modification of the absorbent article of FIG. It is a figure which shows the modification of the absorbent article of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, unless otherwise specified, the same or corresponding configurations may be designated by the same reference numerals and description thereof may be omitted.

FIG. 1 shows a partially broken view of the absorbent article 1 according to one embodiment of the present invention. Further, FIG. 2 shows a cross section taken along line I-I of FIG. As shown in FIGS. 1 and 2, the absorbent article 1 includes a liquid-impermeable back surface sheet 2, a liquid-permeable front surface sheet 3, and an absorber 4 provided between the two sheets 2 and 3. It is provided with a main body (absorbent article main body) 8 to have. In order to maintain the shape of the absorber 4, the absorber 4 may be wrapped with an encapsulated sheet 5 made of crepe paper, a non-woven fabric, or the like. When the absorbent article 1 is used, the back surface sheet 2 side of the main body 8 is fixed to shorts or the like, and the front surface sheet 3 side is attached so as to be the skin side.

The main body 8 as a whole has a predetermined length in the longitudinal direction (first direction D1 in the figure) and a predetermined width in the width direction orthogonal to the longitudinal direction (second direction D2 in the figure). It has an elongated shape. The width of the main body 8 is substantially constant in the illustrated example, but may vary over the longitudinal direction D1. The absorbent article 1 may have a shape and structure substantially axisymmetric with respect to the center line (longitudinal center line) CL extending in the longitudinal direction.

Further, the absorbent article main body 8 has a region (region corresponding to the body fluid discharge port) 30 corresponding to the body fluid discharge port such as the vaginal opening of the wearer at the time of wearing, and the body fluid discharge port corresponding region 30 has a center 30Q. is doing. The center 30Q is on the longitudinal center line CL and is located at the center of the longitudinal length of the body fluid discharge port corresponding region 30. The absorbent article 1 has a central region M including a region corresponding to the body fluid discharge port, a front region F in front of the central region M, and a rear region R behind the central region M. The central region M may have wings W, W extending from both sides thereof to securely fix the absorbent article 1 to the underwear when it is attached. The front region F can be a region from a position serving as a starting point in front of the wing W to the front edge, and a rear region R can be a region from a position serving as a starting point behind the wing W to the trailing edge. Further, when the wings W and W are provided, the center 30Q of the body fluid discharge port corresponding region 30 is the position of the midpoint of the lengths of the side edges of the wings W and W when viewed in the longitudinal direction. It can be located at the midpoint between the front base point and the rear base point of the wing W and W.

In FIG. 1, the length of the rear region R in the longitudinal direction D1 is longer than the length of the front region F, but in this embodiment, the length of the rear region R and the length of the front region F are the same. May be.

In the illustrated form, the absorbent article 1 has wings W and W, but the absorbent article 1 may have no wings W and W. In that case, when the wings W and W are formed at the positions where the wings W and W are conventionally formed, the area in front of the starting point of the wings W and W is set as the front area F and the area behind the wings W and W is set as the front area F. The region behind the position that is the starting point of the above can be defined as the rear region R.

The posterior region R is a region that can correspond to a region from the vicinity of the boundary between the inseam and the buttocks of the wearer to the posterior buttocks at the time of wearing, and can be said to be a region facing the position where the intergluteal cleft starts and the anus. The front end of the rear region R may be located about 110 to 170 mm rearward from the front end of the absorbent article 1 and about 30 to 60 mm rearward from the center 30Q of the body fluid discharge port corresponding region 30.

The total length of the absorbent article 1 is preferably 170 to 360 mm, more preferably 230 to 270 mm, and even more preferably 240 to 260 mm. The length of the rear region R in the longitudinal direction can be 70 to 250 mm.

At the front and rear edge portions of the absorber 4, the outer edges of the back surface sheet 2 and the front surface sheet 3 are bonded by an adhesive such as hot melt or an adhesive means such as a heat seal or an ultrasonic seal. Further, on the side of the absorber 4, the side nonwoven fabrics 7 and 7 provided on both sides of the front surface sheet 3 side along the longitudinal direction D1 and the back surface sheet 2 are joined by the above-mentioned adhesive means. Wings W and W may be formed as described above.

As the back surface sheet 2, a sheet material having at least water impermeability, such as an olefin resin sheet such as polyethylene or polypropylene, can be used. It is possible to use a laminated non-woven fabric in which a non-woven fabric is laminated on a polyethylene sheet or the like, or a laminated non-woven fabric sheet in which a waterproof film is interposed to ensure substantially impermeable liquid permeability. Further, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability. Such a water-impervious / moisture-permeable sheet material is obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. A porous sheet can be used.

The surface sheet 3 is a liquid-permeable sheet that rapidly permeates body fluids such as menstrual blood, vaginal discharge, and urine. As the surface sheet 3, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like is preferably used. As the material fibers constituting the non-woven fabric, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton are used alone or. Two or more types can be used in combination. Examples of the non-woven fabric processing method include a spunlace method, a spunbond method, a thermal bond method, a melt blown method, and a needle punching method. Among these processing methods, the spunlace method is preferable in that it can produce a flexible non-woven fabric and the spunbond method is preferable in that it can produce a non-woven fabric having a high drape property, and the thermal bond method is preferable in that it can produce a bulky and soft non-woven fabric. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can be used.

The absorber 4 interposed between the back surface sheet 2 and the front surface sheet 3 is not limited as long as it is a material capable of absorbing and retaining body fluid, but preferably contains cotton-like pulp and a water-absorbent polymer. As the water-absorbent polymer, a superabsorbent polymer (SAP), a superabsorbent polymer fiber (SAF), or a combination thereof can be used. Examples of the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. As a raw material for chemical pulp, hardwood, softwood and the like are used, but softwood is preferably used because of its long fiber length and the like.

Further, synthetic fibers may be mixed with the absorber 4. As the synthetic fiber, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used, and two of these can be mixed. It can also be used. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can also be used. In addition, it is also possible to use a hydrophobic fiber whose surface is treated with a hydrophilic agent to give an affinity to a body fluid.

The thickness of the absorber 4 can be in the range of 0.5 to 25 mm, preferably in the range of 1.5 to 6.5 mm. The absorber 4 does not have to have a uniform thickness over the front surface, and may have a structure in which a region corresponding to the body fluid discharge port 50 and its vicinity, and a central portion in the width direction of the rear region are bulged. Further, the absorber 4 is preferably manufactured by a stacking fiber or an air raid method.

As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used. For example, in the case of enhancing the effect of preventing menstrual blood or vaginal discharge from penetrating or enhancing the feeling of touch, it is preferable to use a water-repellent treated non-woven fabric coated with a silicon-based or paraffin-based water repellent. Further, in the case of enhancing the absorbability of menstrual blood or the like in the wing W, it is preferable to use a hydrophilically treated non-woven fabric as the material of the non-woven fabric. As the type of non-woven fabric, a soft air-through non-woven fabric that does not easily crease and wrinkles is preferable.

The main body of the absorbent article 1 of the present embodiment is provided with a plurality of squeezing grooves (also referred to as compression grooves or embossing). This squeezing groove is formed as a groove recessed from the front surface sheet 3 to the back surface sheet 2 side. The squeezing groove may be formed in line symmetry with the longitudinal center line CL of the absorbent article 1 as the symmetric line in a plan view. The squeezing groove can be formed by passing a laminated body in which the surface sheet 3 is laminated on the absorbent body 4 between a pair of pressure rolls. For example, a convex roll and a flat roll can be arranged on the surface sheet 3 side and the absorber 4 side of the laminated body, and pressure can be applied from both rolls.

As shown in FIG. 1, the absorbent article 1 of the present embodiment has a pair of central squeezing grooves extending in the longitudinal direction on both sides of the longitudinal center line CL in the central region M, spaced apart from each other in the width direction. It has 10 and 10. Further, the absorbent article 1 has a pair of posterior first squeezing grooves 11 and 11 extending in the longitudinal direction on both sides of the longitudinal center line CL in the posterior region R, spaced apart from each other in the width direction. ing. It is preferable that the pair of rear first squeezing grooves 11 and 11 are provided in a region of the front half of the rear region R, for example, a region up to 70 mm from the front end of the rear region R. As shown in FIG. 1, the pair of rear first squeezing grooves 11 and 11 and the pair of central squeezing grooves 10 and 10 in front of the pair of rear first squeezing grooves 11 and 11 are not connected to each other.

In normal use of the absorbent article 1, the bodily fluid is drained directly into the central region M including the bodily fluid outlet corresponding region 30. A part of the bodily fluid received in the central region M is absorbed by the absorber through the surface sheet 3 at the received position, but a part can diffuse and migrate in the surface direction in the absorptive body. Upon diffusion, the body fluid can be guided in longitudinal direction D1 along a pair of central squeezing grooves 10, 10 where the absorber is dense.

Here, it is preferable that the central region M, in which a large amount of body fluid can be directly discharged at once, has a structure that guides the body fluid backward along the squeezing groove as soon as possible. On the other hand, in the posterior region R where the body fluid diffused or induced from the central region M arrives, it is preferable to enable the body fluid to be satisfactorily absorbed and diffused by the absorber. This is because if the amount of body fluid absorbed in the posterior region R can be increased, the continuous transfer of body fluid from the central region M to the posterior region R can be smoothly performed, and lateral leakage or the like in the central region M can be prevented.

In this embodiment, as shown in FIG. 1, the pair of central squeezing grooves 10 and 10 and the pair of rear first squeezing grooves 11 and 11 are discontinuous. Therefore, when the body fluid guided backward along the pair of central squeezing grooves 10 and 10 reaches the rear ends 10b and 10b of the pair of central squeezing grooves 10 and 10, the region around the rear ends 10b and 10b is reached. Can spread to.

The diffusion from the rear end 10b of the central pressing groove 10 will be described more specifically with reference to FIG. FIG. 3 is an enlarged view of a part of the range from the rear of the central region M of the absorbent article 1 shown in FIG. 1 to the front of the rear region R. As shown in FIG. 3, at least a part of the body fluid guided backward along the central pressing groove 10 radiates around the rear end 10b of the central pressing groove 10 (partially concentric circles of dotted lines shown in FIG. 3). Can spread. Such diffusion of the body fluid in the posterior region R is unlikely to occur in the conventional form in which the squeezing groove is continuous from the central region M to the posterior region R, for example, but with the pair of central squeezing grooves 10 and 10 according to this embodiment. This was made possible by the discontinuous arrangement of the pair of posterior first squeezing grooves 11, 11. As described above, according to this embodiment, the body fluid can be satisfactorily absorbed in the anterior lateral region of the posterior region R, which has not been appropriately used in the past, so that the absorption performance of the absorber of the entire posterior region R can be improved. Can be done.

Further, as shown in FIG. 3, a part of the body fluid diffused from the rear end 10b of the central squeezing groove 10 can be drawn into the rear first squeezing groove 11 located in the vicinity. As a result, the body fluid diffused from the rear end 10b of the central squeezing groove 10 can be further guided backward along the posterior first squeezing groove 11.

As shown in FIGS. 1 and 3, the front ends 11a and 11a of the pair of rear first squeezing grooves 11 and 11 are located inside the rear ends 10b and 10b of the pair of central squeezing grooves 10 and 10 in the width direction D2. is doing. This makes it possible to widen the front widthwise outer region of the pair of posterior first squeezing grooves 11, 11, that is, the anterior lateral region of the posterior region. As a result, the region where the body fluid can be absorbed can be expanded, and the absorber in the posterior region R can be utilized more effectively, so that more body fluid can be absorbed by absorption in the entire posterior region R. Further, the distance between the front ends 11a and 11a of the pair of rear first squeezing grooves 11 and 11 (the distance a described later) is set to the distance between the rear ends 10b and 10b between the pair of central squeezing grooves 10 and 10 (the distance described later). d) Since it can be made narrower, the region between the pair of posterior first squeezing grooves 11 and 11 can be raised sharper than the region between the pair of central squeezing grooves 10 and 10, and the pair of posterior first squeezing grooves can be squeezed sharply. The region between the grooves 11 and 11 can easily enter the groove of the buttocks, the fit is improved, and leakage in the rear region R can be prevented.

Further, as shown in FIGS. 1 and 3, the front ends 11a and 11a of the pair of rear first squeezing grooves 11 and 11 are the same as the rear ends 10b and 10b of the pair of central squeezing grooves 10 and 10 in the longitudinal direction D1. At or behind it. That is, the pair of central squeezing grooves 10 and 10 and the pair of rear first squeezing grooves 11 and 11 do not overlap in the longitudinal direction. This makes it possible to minimize the possibility that the posterior first squeezing groove 11 interferes with the radial diffusion of the body fluid centering on the rear end 10b of the central squeezing groove 10 as described above.

As described above, the above-mentioned arrangement of the pair of central squeezing grooves 10 and 10 and the pair of posterior first squeezing grooves 11 and 11 draws in the body fluid of the central squeezing groove 10 and the posterior first squeezing groove 11 in the longitudinal direction. The body fluid can be diffused from the rear end 10b of the central squeezing groove 10 to the surrounding absorber while maintaining the function of inducing the body fluid. As a result, it is possible to utilize the absorption function of the absorber in the front side region of the rear region, which has been difficult to utilize in the conventional configuration, and it is possible to improve the absorption performance of the rear region R as a whole. Therefore, the body fluid guided along the central squeezing groove 10 is smoothly transferred backward without stagnation in the central region M, so that further guidance from the central region M to the rear can be further promoted, and in the central region M. It is possible to prevent lateral leakage and the like.

The pair of posterior first squeezing grooves 11, 11 may extend linearly in the longitudinal direction or may be curved. However, as shown in FIGS. 1 and 3, the pair of posterior first squeezing grooves 11 and 11 are respectively curved so as to be convex inward in the width direction, that is, the pair of posterior first squeezing grooves 11 in a plan view. It is preferable that the squeezing grooves 11 and 11 have a shape in which the central position is constricted when viewed in the longitudinal direction D1. Normally, the groove in the buttocks gradually becomes deeper from the inseam toward the rear in the longitudinal direction, and gradually becomes shallower again as it approaches the rear of the buttocks. Due to the above-mentioned shapes of the pair of rear first squeezing grooves 11 and 11, the rear region R is deformed so that the vicinity of the longitudinal center line CL rises toward the surface sheet side (skin side) so as to match the shape of the groove in the buttocks. It is possible to improve the fit of the absorbent article 1.

The radius of curvature of the convex shape of the pair of rear first squeezing grooves 11 is preferably about 20 to 50 mm, and more preferably about 25 to 35 mm. By setting the radius of curvature in such a range, the rear region R can be deformed into a shape more suitable for the groove of the buttocks at the time of mounting.

The widthwise distance e (FIG. 1) between the rear end 10b of the central compression groove 10 and the front end 11a of the rear first compression groove 11 is preferably 2 to 10 mm, more preferably 3 to 8 mm. .. By setting the interval e to 2 mm or more, the range in which the body fluid can be diffused from the rear end 10b of the central pressing groove 10 can be increased. Further, by setting the interval e to 10 mm or less, the rear end 10b of the central compression groove 10 and the front end 11a of the rear first compression groove 11 appropriately approach each other, and the body fluid diffused from the rear end 10b of the central compression groove 10 is discharged. , Can be satisfactorily pulled into the rear first squeezing groove 11.

As described above, when the pair of rear first squeezing grooves 11 and 11 each have a convex shape inward in the width direction in a plan view, the width direction between the pair of rear first squeezing grooves 11 and 11 The spacing can be minimal near the center of longitudinal D1. The minimum distance b (FIG. 1) in the width direction D2 between the pair of rear first squeezing grooves 11 and 11 is preferably 7.5 to 15 mm, more preferably 8 to 13 mm. By setting the interval b to 7.5 mm or more, it is possible to prevent the main body from becoming stiff due to the rear first squeezing grooves 11 and 11 coming too close to each other and impairing the wearing feeling. Further, by setting the interval b to 15 mm or less, when the main body is deformed so that the skin side rises at the time of wearing, the area between the pair of rear first squeezing grooves 11 and 11 can easily enter due to the groove in the buttocks, and fits. It can enhance the sex.

The widthwise distance c (FIG. 1) between the pair of rear first squeezing grooves 11, 11 at the rear ends 11b, 11b is preferably 8 to 18 mm, more preferably 10 to 13 mm. By setting the interval c to 10 mm or more, it is possible to prevent the rear first squeezing grooves 11 and 11 from being excessively close to each other and excessively increasing the rigidity of the main body and impairing the wearing feeling. Further, by setting the interval c to 20 mm or less, when the body fluid is guided backward along the rear first squeezing groove 11, it is prevented from spreading too much outward in the width direction behind the rear first squeezing groove 11. can do. The interval c can be 1/4 or less of the width of the absorber 4 (the length in the width direction D2).

The widthwise distance a (FIG. 1) between the front ends 11a and 11a of the pair of rear first squeezing grooves 11 and 11 is from the widthwise distance d between the rear ends 10b and 10b of the pair of central squeezing grooves 10 and 10. It is not particularly limited as long as it is small, but it is preferably 12 to 24 mm, and more preferably 14 to 20 mm. By setting the interval a to 12 mm or more, the absorbent article 1 can be deformed to fit into the groove of the buttocks at the time of mounting. Further, by setting the thickness to 24 mm or less, the outer region in the width direction near the front ends 11a and 11a of the pair of rear first squeezing grooves 11 and 11 can be widened, and the body fluid from the rear end 10b of the central squeezing groove 10 diffuses. The area to be used can be increased. The widthwise distance a between the front ends 11a and 11a of the pair of rear first squeezing grooves 11 and 11 may be larger than the widthwise distance c between the rear ends 11b and 11b. As a result, the absorbent article 1 can be deformed to fit the body part from the rear of the inseam to the buttocks where the depth of the groove is gradually deepened at the time of wearing.

In the illustrated embodiment, the length of the pair of central pressing grooves 10 and 10 in the longitudinal direction D1 is longer than the length of the central region M in the longitudinal direction D1. That is, the pair of central pressing grooves 10 and 10 are provided beyond the front end and the rear end of the central region M. However, the length of the pair of central squeezing grooves 10 and 10 may be equal to the length of the central region M, and the pair of central squeezing grooves 10 and 10 extend within the central region M. You may. However, when the rear end 10b and 10b of the pair of central pressing grooves 10 and 10 extend beyond the central region M to the rear region R, the rear end 10b which is the base point where the above-mentioned radial diffusion occurs is the rear region R. It is preferable because it can be located in the posterior region R and can promote the absorption and diffusion of body fluid in the posterior region R.

The pair of central squeezing grooves 10, 10 may extend linearly along the longitudinal direction, or may be at least partially curved. However, as shown in FIG. 1, it is preferable that the rear ends 10b and 10b of the pair of central pressing grooves 10 and 10 face inward in the width direction, that is, are curved or bent inward in the width direction. As a result, as described above, a region where the body fluid can diffuse radially from the rear end 10b can be secured wider on the outer side in the width direction of the pair of central pressing grooves 10 and 10. Further, it is preferable that each of the pair of central pressing grooves 10 and 10 has a shape convex outward in the width direction in a plan view.

The widthwise distance d (FIG. 1) between the rear ends 10b and 10b of the pair of central squeezing grooves 10 and 10 is from the widthwise distance a between the front ends 11a and 11a of the pair of rear first squeezing grooves 11 and 11. If it is large, it is not particularly limited, but it is preferably 15 to 40 mm, and more preferably 25 to 30 mm. The widthwise distance b between the rear ends 10b and 10b of the pair of central pressing grooves 10 and 10 can be made smaller than the widthwise distance between the front ends 10a and 10a.

As shown in FIG. 1, the absorbent article 1 may have a pair of rear second squeezing grooves 12 and 12 arranged behind the pair of rear first squeezing grooves 11 and 11 as squeezing grooves. As shown in the figure, the pair of posterior second squeezing grooves 12, 12 may include a portion in which the widthwise spacing gradually increases toward the rear.

In the illustrated embodiment, the pair of posterior second squeezing grooves 12, 12 are not connected to each other, but may be connected to each other at least one of the anterior and posterior. Further, the shape of the pair of rear second squeezing grooves 12, 12 is an inverted heart shape as a whole, but the shape is not limited to this, and may be an inverted triangle, a drop shape, or the like.

The front ends 12a and 12a of the pair of rear second squeezing grooves 12 and 12 are preferably located inward in the width direction from the rear ends 11b and 11b of the pair of rear first squeezing grooves 11 and 11 in the width direction D2. .. As a result, when the body fluid is guided backward from the central pressing groove 10 through the rear first pressing groove 11, the body fluid reaching the rear end 11b of the rear first pressing groove 11 is described above from the rear end 11b. As with the diffusion from the rear end 10b of the central pressing groove 10 (FIG. 3), the region can be diffused at least partially radially and the region can be expanded outward in the width direction. Therefore, for example, even when a large amount of body fluid is discharged, the absorber in the rear region R can be effectively used, and leakage or the like in the central region M can be prevented.

FIG. 4 shows a modified example of the absorbent article 1. The form of FIG. 4 differs from the form of FIG. 1 in that a pair of buttock groove fitting pressing portions 20 and 20 are formed. Each of the pair of buttock groove fitting pressing portions 20 and 20 is formed on the side of the pair of rear first squeezing grooves 11 and 11, respectively.

When the absorbent article 1 is deformed along the shape of the body at the time of wearing, the posterior first squeezing grooves 11 and 11 are broken, and the area between the posterior first squeezing grooves 11 and 11 rises toward the skin, and the buttocks It will get into the groove. In this embodiment, since the distance between the rear first squeezing grooves 11 and 11 is relatively narrow and the regions on both sides of the rear first squeezing grooves 11 and 11 are large, both sides of the rear first squeezing grooves 11 and 11 are large. The rigidity of one area is small. Therefore, when the absorbent article 1 is deformed so as to raise the region between the rear first squeezing grooves 11 and 11 as described above, especially when the user moves, the rear first squeezing grooves 11 and 11 The regions on both sides of the buttock may be twisted, and the influence thereof may be extended to the region between the pair of posterior first squeezing grooves 11 and 11 so as not to properly fit the buttock groove.

On the other hand, since the pair of buttock groove fitting pressing portions 20 and 20 are provided, it is possible to provide stiffness on both sides of the rear first squeezing groove 11 and 11, so that the rear region as described above can be provided. Even when the R is deformed, the shape in which the region between the rear first squeezing grooves 11 and 11 is raised can be well maintained.

In the form of FIG. 4, the buttock groove fitting squeezing portion 20 is a closed circular squeezing groove, but the buttock groove fitting squeezing portion 20 is not limited to this. The buttock groove fitting pressing portion 20 may be a closed or partially open pressing groove such as an ellipse or a polygon instead of a circular one. Further, it may be a squeezed portion such as a circle, an ellipse, or a polygon having a predetermined area.

The range and position where the buttock groove fitting squeezing portions 20 are provided on both sides of the rear first squeezing groove 11 are particularly limited as long as they do not interfere with the diffusion of body fluid from the rear end 10b of the central squeezing groove 10 described above. Not limited. The range in which the buttock groove fitting pressing portion 20 is provided may be about 5 to 30 mm in the longitudinal direction D1 and may be about 5 to 25 mm in the width direction D2. Further, it is preferable that the buttock groove fitting squeezing portion 20 is not formed beyond the front end 11a of the rear first squeezing groove 11 in front, and is 3 mm or more rearward in the longitudinal direction D1 from the front end 11a of the rear first squeezing groove 11. It is preferably formed in.

FIG. 5 shows an absorbent article 1 provided with a pair of buttock groove fitting 20A, 20A which is a modification of the pair of buttock groove fitting pressing portions 20 and 20 of FIG. The buttock groove fitting squeezing portion 20A has a shape in which two closed circular squeezing grooves are overlapped and each has a portion protruding outward from the two circles. Further, the shape of the buttock groove fitting pressing portion 20A can be a shape in which a plurality of elliptical shapes, polygons, and the like are overlapped. Further, the buttock groove fitting pressing portion may have a shape composed of motifs such as flowers, stars, and hearts.

Since the absorbent article 1 according to this embodiment can utilize the absorber in the rear region R, when a relatively large amount of body fluid is discharged at once, or even if it is intermittent, the body fluid is discharged many times and discharged. It can be suitably used when the total amount of body fluid to be produced is large. Further, it can be suitably used as a slim type absorbent article having a small amount of absorbent body, particularly a sanitary napkin.

1 Absorbent article 2 Back sheet 3 Front sheet 4 Absorbent 5 Encapsulated sheet 7 Side non-woven fabric 8 Main body (absorbent article main body)
10 Central squeezing groove 10a Front end of central squeezing groove 10b Rear end of central squeezing groove 11 Rear first squeezing groove 11a Front end of rear first squeezing groove 11b Rear end of rear first squeezing groove 12 Rear second squeezing groove 12a Rear second Front end 20, 20A of squeezing groove Fitting buttock groove 30 Body fluid discharge port compatible area 30Q Center of body fluid discharge port compatible area CL Longitudinal center line F Front area M Central area R Rear area D1 First direction (longitudinal direction)
D2 2nd direction (width direction)
W wing

Claims (5)

An absorbent article comprising an elongated body having a liquid-permeable front sheet, an impermeable back sheet, and an absorber provided between the front surface sheet and the back surface sheet.
It has a squeeze groove that extends in the longitudinal direction.
The squeezing groove includes a pair of central squeezing grooves provided in a central region including a region corresponding to a body fluid discharge port of the wearer at the time of wearing, and a pair of rear first first squeezing grooves provided behind the pair of central squeezing grooves. A pair of posterior second squeezing grooves and a pair of posterior second squeezing grooves provided behind the pair of posterior first squeezing grooves are included.
The rear ends of the pair of central squeezing grooves are each curved inward in the width direction.
Each of the pair of posterior first squeezing grooves is convexly curved inward in the width direction.
The widthwise distance between the rear ends of the pair of posterior first squeezing grooves is 1/4 or less of the width of the absorber.
The front end of the posterior first squeeze groove is located inward of the rear end of the central squeeze groove in the width direction and at the same position as or behind the rear end of the central squeeze groove in the longitudinal direction. ,
No squeezing portion is formed between the pair of rear first squeezing grooves, and the squeezing portion is not formed.
A pair of squeezing portions are further provided, and each squeezing portion is provided on the side of the pair of posterior first squeezing grooves without crossing the front end of the rear first squeezing groove forward . Absorbent article. 1. Absorbent article. The absorbent article according to claim 1 or 2, wherein the minimum widthwise distance between the pair of rear first squeezing grooves is 7.5 to 15 mm. The absorbent article according to any one of claims 1 to 3, wherein the distance between the rear ends of the pair of rear first squeezing grooves in the width direction is 10 to 20 mm. The absorbent article has a central region and a posterior region behind the central region that corresponds to a site from near the boundary between the inseam and the buttocks to the posterior buttocks.
The absorbent article according to any one of claims 1 to 4, wherein each of the rear ends of the pair of central squeezing grooves extends beyond the central region to the posterior region.

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