JP6974014B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article.

Conventionally, as absorbent articles such as panty liners, sanitary napkins, and incontinence pads, those in which an absorbent body is provided between a liquid-permeable front sheet and an impermeable back sheet are known.

In such an absorbent article, in order to more reliably capture the body fluid, the central portion of the absorber is raised toward the skin by using the compressive force received from both legs while the absorbent article is attached, and the body fluid discharge portion is used. Some are configured to be in close contact with the buttocks. Among them, there is one in which a pair of grooves extending in the longitudinal direction are formed in double, and the central portion of the absorber is raised stepwise in the width direction.

For example, in Patent Document 1, a first flexible shaft and a second flexible shaft outside the first flexible shaft are formed so as to extend in the vertical direction at positions separated from the center line on both the left and right sides. It is disclosed that a central absorbing portion is formed between the flexible shafts of 1 and both sides thereof can be bent via the first flexible shaft and the second flexible shaft.

Further, in Patent Document 2, a pair of inner grooves curved outward in the width direction are formed on both sides of the excretion portion region, and each pair of inner grooves is formed outward in the width direction and outward in the width direction. A pair of convexly curved outer grooves are formed, the longitudinal length of the outer groove is longer than the longitudinal length of the inner groove, and the convex top of the inner groove is the longitudinal length of the outer groove. Those arranged within the range of the length of are disclosed.

Japanese Patent No. 4180865 Japanese Patent No. 5292083

However, in the absorbent articles of Patent Documents 1 and 2, the absorber swells at the same height in the region corresponding to the body fluid discharge port and the region extending in the longitudinal direction thereof. Therefore, a gap may be formed before and after the dent of the body such as the body fluid discharge port to which the absorber is most closely attached, and leakage may occur.

Further, the flexibility of the absorber tends to decrease in the portion where the grooves are double formed, but in the absorbent articles of Patent Documents 1 and 2, such double grooves are formed in the body fluid discharge port. It is formed in close proximity to the corresponding region. Therefore, the portion where the flexibility of the absorber is reduced tends to hit the vicinity of the delicate body fluid discharge port, which may cause a sense of discomfort.

In view of the above points, it is an object of the present invention to provide an absorbent article having an excellent fit to a dent of the body and an improved wearing feeling.

In order to solve the above problems, the first embodiment of the present invention comprises a liquid permeable front sheet, an impermeable back sheet, and an absorber provided between the front surface sheet and the back surface sheet. The main body is an absorbent article having a main body having a main body, and the main body has an elongated shape having a predetermined length in the front-rear direction and a predetermined width in a direction orthogonal to the front-rear direction, and the main body has the surface. A squeezing groove is formed from the sheet side to the back surface sheet side, and the squeezing groove is axisymmetrically curved with the center line extending in the front-rear direction of the main body as an axis of symmetry and concavely curved inward in the width direction. A pair of first squeezing grooves extending in the direction and a pair of second squeezing grooves formed inside the pair of first squeezing grooves on a pair of virtual curves extending in the anteroposterior direction in line symmetry with the center line as the axis of symmetry. The second squeezing groove has a front portion and a rear portion, respectively, and passes through a position orthogonal to the center line and the distance between the pair of first squeezing grooves is minimized. When the lines separated from the virtual line forward and backward and parallel to the first virtual line are the second virtual line and the third virtual line, respectively, the distance between the second virtual line and the third virtual line. 20 to 80 mm, and the rear end of the front portion and the front end of the rear portion are terminated by the second virtual line and the third virtual line, respectively.

According to the first embodiment, inside the pair of first squeezing grooves (outer squeezing grooves), the second squeezing groove (2nd squeezing groove) extends over a predetermined range before and after the position where the distance between the first squeezing grooves is minimized. A region without an inner squeeze groove) is formed. Therefore, when the absorber receives compressive force from both legs, the height at which the absorber rises in the region without the second squeezing groove can be increased as compared with the regions before and after the absorber. As a result, the absorber or the main body can be brought into close contact with the hollow of the body, and the body fluid can be captured more reliably.

In addition, since the squeezing grooves are not densely packed in the vicinity of the region corresponding to the depression of the body, it is possible to avoid a decrease in the flexibility of the absorber. Therefore, the portion where the flexibility of the absorber is reduced can prevent the discomfort caused by hitting the skin near the delicate dent of the body, and the wearing feeling can be improved.

A second embodiment of the present invention comprises a main 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. The main body is an elongated shape having a predetermined length in the front-rear direction and a predetermined width in a direction orthogonal to the front-rear direction, and the main body has a front surface sheet side to a back surface sheet side. A pair of first squeezing grooves are formed, and the squeezing grooves are line-symmetrically curved with the center line extending in the front-rear direction of the main body as an axis of symmetry and curved inward in the width direction in a concave shape and extending in the front-rear direction. A pair of squeezing grooves and a pair of second squeezing grooves including a portion formed on a pair of virtual curves extending in the anteroposterior direction in line symmetry with the center line as the axis of symmetry inside the pair of first squeezing grooves. The second squeezing groove has a front portion and a rear portion, respectively, and is orthogonal to the center line and passes through a position where the distance between the pair of first squeezing grooves is minimized. When the lines separated from the front and the rear and parallel to the first virtual line are the second virtual line and the third virtual line, respectively, the distance between the second virtual line and the third virtual line is 20 to 80 mm. The front portion and the rear portion are varied on the intersection of the virtual curve and the second virtual line and the intersection of the virtual curve and the third virtual line, respectively, and the front portion is described. The portion that crosses the second virtual line rearward and the portion that crosses the third virtual line forward of the rear portion are outside in the width direction from the turning point of the front portion and the turning point of the rear portion, respectively. It is curved toward the position where the distance between the first squeezing grooves in the first squeezing groove is minimized.

According to the second aspect, a region inside the pair of first squeezing grooves where the distance between the second squeezing grooves is expanded over a predetermined range before and after the position where the distance between the first squeezing grooves is minimized. Is formed. Therefore, when the absorber receives compressive force from both legs, the height at which the absorber rises in the region without the second squeezing groove can be increased as compared with the regions before and after the absorber. As a result, the absorber can be brought into close contact with the hollow of the body, and the body fluid can be captured more reliably. Further, since the second squeezing groove has a portion curved outward in the width direction from the inflection point, the rigidity on the side portion of the main body is increased, and the absorber can be raised more reliably.

Further, since the squeezing grooves are not densely packed in the vicinity of the region corresponding to the body fluid discharge port, it is possible to avoid a decrease in the flexibility of the absorber. Therefore, the portion where the flexibility of the absorber is reduced can prevent the discomfort caused by hitting the skin near the delicate dent of the body, and the wearing feeling can be improved.

In the third aspect of the present invention, the rear end of the front portion and the front end of the rear portion are connected to the first squeezing groove at the position where the distance between the first squeezing grooves is minimized.

According to the third aspect, the rigidity on the side of the main body can be increased, and the absorber can be raised more reliably.

In the fourth aspect of the present invention, the ratio of the distance between the first virtual line and the second virtual line and the distance between the first virtual line and the third virtual line is 1: 3 to 3: 1. Is.

According to the fourth aspect, the absorber can be raised in a well-balanced manner before and after the position where the distance in the width direction between the first squeezing grooves is minimized, that is, the position where the compressive forces of both legs are easily received.

In the fifth embodiment of the present invention, the distance between the first squeezing groove and the second squeezing groove in the width direction is 2 to 15 mm.

According to the fifth aspect, the flexibility of the absorber is prevented from being lowered by keeping a predetermined distance between the first squeezing groove and the second squeezing groove. Therefore, it is possible to prevent the absorbent body having reduced flexibility from hitting the skin and causing a feeling of strangeness.

In the sixth embodiment of the present invention, a front squeezing groove and a rear squeezing groove extending in the width direction are formed in the front and rear of the main body, respectively, and the front end and the rear end of the first squeezing groove are the front and rear ends, respectively. An annular groove is formed by being connected to the squeezing groove and the rear squeezing groove.

According to the sixth aspect, since the squeezing groove connected to the first squeezing groove is provided in the front and the rear and the outer groove is annular, not only the side of the absorbent article but also the entire circumference. Leakage can be satisfactorily prevented over the entire period.

In the seventh aspect of the present invention, a front squeezing groove and a rear squeezing groove extending in the width direction are formed in the front and rear of the main body, respectively, and the front end and the rear end of the second squeezing groove are the front and rear ends, respectively. It is connected to the squeeze groove and the rear squeeze groove.

According to the seventh aspect, since the squeezing groove connected to the second squeezing groove is provided in the front and the rear, leakage in the front-rear direction can be satisfactorily prevented.

According to one embodiment of the present invention, it is possible to provide an absorbent article having an excellent fit to a dent of the body and an improved wearing feeling.

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. FIG. 3 is a sectional view taken along line I-I when an absorbent article according to an embodiment of the present invention is used. FIG. 2 is a sectional view taken along line II-II of an absorbent article according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II when an absorbent article according to an embodiment of the present invention is used. It is a center line CL sectional view at the time of use of the absorbent article by one embodiment of this invention. It is a figure which shows the absorbent article by another form of this invention. It is a figure which shows the absorbable article by still another form of this invention. It is a figure which shows the absorbable article by still another form of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1, 2A and 3A, the absorbent article 1 includes a liquid-impermeable back sheet 2, a liquid-permeable front sheet 3, and absorption provided between the two sheets 2 and 3. It is provided with a main body (absorbent article main body) 8 having the body 4. 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.

As shown in FIG. 1, the main body 8 has an elongated shape having a predetermined length in the front-rear direction as a whole, and has a substantially constant width in a direction orthogonal to the front-back direction. The absorbent article 1 has a shape substantially line-symmetrical with respect to the center line CL extending in the front-rear direction. Further, the absorbent article 1 has a central region M including a region 30 corresponding to a body fluid discharge port when mounted, a front end region F in front of the central region M, and a rear end behind the central region M. It has a part region R. The central region M has wing WGs extending from both sides thereof. The front end region F can be a region forward from a position that is a starting point in front of the wing WG, and a rear end region R can be a region rearward from a position that is a starting point behind the wing WG.

At the front and rear edge portions of the absorber 4, the outer edge of the back surface sheet 2 and the outer edge of 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, side nonwoven fabrics 7 are provided on both sides of the surface sheet side along the front-rear direction (longitudinal direction), respectively. The side nonwoven fabric 7 partially protrudes to the side of the main body 8 and is laminated on the back surface sheet 2 which also protrudes to the side, and is joined by an adhesive such as a hot melt or an adhesive means such as a heat seal or an ultrasonic seal. As a result, wing WGs are formed on both sides of the main body 8.

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 granular powder (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 the body fluid discharge port corresponding region 30 and the like 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, paraffin-based, alkylchromic chloride-based water repellent, or the like. .. Further, when enhancing the absorbability of menstrual blood or the like in the wing WG, 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 fold and wrinkles is preferable.

Even if the outer edge of the wing WG is provided with a squeezed portion (emboss) having a dot shape or a predetermined shape at a predetermined position for joining the side nonwoven fabric 7 and the back surface sheet 2 and for increasing the rigidity. good.

The total length of the absorbent article 1 can be 130 to 450 mm, 140 to 360 mm, and 170 to 270 mm.

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. This makes it possible to facilitate deformation suitable for the shape of the body and control the transfer of body fluid on the surface or inside. 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, the laminated body can be passed so that a convex roll and a flat roll are arranged on the surface sheet 3 side and the absorber 4 side, respectively.

In the above-mentioned squeezing groove, a pair of first squeezing grooves 11 which are line-symmetrically curved inward in the width direction and extend in the front-rear direction in a line symmetry with the center line CL extending in the front-rear direction as the axis of symmetry in the main body 8 in a plan view. 11 is included. In the form of FIG. 1, the first squeezing grooves 11 and 11 are provided in a range extending over the central region M and further beyond the central region M in the front-rear direction. With the first squeezing grooves 11 and 11, the side portion of the absorbent article can be easily bent at the time of mounting, and the area between the first squeezing grooves 11 and 11 can be raised, thereby improving the fit to the body. Can be done. Further, since the first squeezing grooves 11 and 11 are concavely curved inward in the width direction, the absorbent article 1 can be naturally deformed along the roundness of both legs (thighs) at the time of mounting.

The squeezing groove in the illustrated form has a low-pressure squeezing portion and a high-pressure squeezing portion formed deeper than the low-pressure squeezing portion. In the drawings, the high-pressure squeezing groove is displayed in black and the low-pressure squeezing groove is displayed in white.

In the embodiment of FIG. 1, a predetermined range before and after the position where the distance in the width direction in which the pair of first squeezing grooves 11 are separated is minimized corresponds to the body fluid discharge port corresponding region 30. When the absorbent article 1 is attached to the underwear, the body fluid discharge port corresponding region 30 is arranged substantially in the center of the crotch portion of the underwear.

In this embodiment, in addition to the pair of first squeezing grooves 11 and 11, a pair of second squeezing grooves 21 which are line-symmetrical with the center line CL as the axis of symmetry inside the pair of first squeezing grooves 11 and 11. 21 is provided. The second squeezing grooves 21 and 21 are formed on a pair of virtual curves Y extending in the front-rear direction. The pair of virtual curves Y may be part of an arc. Further, when the pair of virtual curves Y are concavely curved inward in the width direction like the pair of first squeezing grooves 11 and 11, the absorbent article is naturally absorbed along the roundness of both legs (thighs) at the time of mounting. It is preferable because 1 can be deformed. The degree of curvature of the virtual curve Y may be the same as or different from the degree of concave curvature of the first squeezing grooves 11 and 11.

The pair of second squeezing grooves 21 and 21 each have a front portion 21a and a rear portion 21b, respectively. In the embodiment of FIG. 1, the front portion 21a and the rear portion 21b are orthogonal to the center line CL and are in front of the first virtual line X1 passing through a position where the distance between the pair of first squeezing grooves 11 is minimized. And formed posteriorly. Further, a line away from the first virtual line X1 and parallel to the first virtual line X1 is referred to as a virtual line X2, and a line away from the first virtual line X1 and parallel to the first virtual line X1 is defined as a virtual line X3. , The rear end of the second virtual line X2 front portion 21a and the front end of the rear portion 21b are terminated by the second virtual line X2 and the third virtual line X3, respectively. That is, the rear end of the front portion 21a and the front end of the rear portion 21b are formed so as not to fall within the range between the second virtual line X2 and the third virtual line X3, and are separated from each other in the front-rear direction. Here, the distance between the second virtual line X2 and the third virtual line X3 is 20 to 80 mm.

With the above configuration, it is possible to form a region in which the second squeezing grooves 21 and 21 do not exist inside over a predetermined range before and after the position where the distance between the first squeezing grooves 11 and 11 is minimized.

Hereinafter, the effect of the above configuration will be described. 2 (A) and 2 (B) are cross-sectional views taken along the line I-I of FIG. 1, that is, a schematic cut at a position outside the range between the second virtual line X2 and the third virtual line X3. A cross-sectional view is shown. FIG. 2A is a cross-sectional view of the absorbent article 1 before mounting, and FIG. 2B is a cross-sectional view of the absorbent article 1 in a mounted state. As shown in FIG. 2A, the absorbent article 1 is flat as a whole in the state before mounting. On the other hand, at the time of mounting, as shown in FIG. 2B, when the forces F from both legs are applied to both sides, the center of the absorbent article 1 rises. In this case, the main starting point of the swelling is the second squeezing grooves 21 and 21 formed inside.

On the other hand, FIGS. 3A and 3B show a schematic cross-sectional view taken along the line II-II of FIG. 1, that is, at a position within the range of the second virtual line X2 and the third virtual line X3. A schematic cross-sectional view cut is shown. FIG. 3A is a cross-sectional view before mounting, and FIG. 3B is a cross-sectional view in a state where the absorbent article 1 is mounted. Before mounting, the absorbent article 1 is flat as a whole as shown in FIG. 3 (A), but when mounted, the force F from both legs is applied to both sides as shown in FIG. 3 (B). The center of the receiving and absorbing article 1 rises. At the position of the cross-sectional view shown in FIG. 3B, the second squeezing grooves 21 and 21 do not exist, so that the main starting point of the swelling is the first squeezing grooves 11 and 11.

Positions outside the range between the second virtual line X2 and the third virtual line X3 (FIG. 2B) and positions within the range between the second virtual line X2 and the third virtual line X3 (FIG. 2B). Compared with FIG. 3B), the width between the main starting points of the swelling of the absorber 4 at the time of mounting is larger in the latter case. Therefore, at the position within the range between the second virtual line X2 and the third virtual line X3 (FIG. 3B), between the second virtual line X2 and the third virtual line X3 before and after that position. The absorber 4 can be raised higher in the thickness direction of the absorbent article 1 as compared with the position outside the range of (FIG. 2B).

The above points can be further described with reference to FIG. 4, which shows a schematic cross-sectional view taken along the center line CL of FIG. As shown in FIG. 4, the height at which the absorber 4 rises at the time of mounting is within the range between the second virtual line X2 and the third virtual line X3, and the height of the second virtual line X2 and the third virtual line X3. Different from outside the range. That is, at the time of mounting, the central portion of the absorber 4 rises when viewed in the front-rear direction, but rises highest within the range between the second virtual line X2 and the third virtual line X3.

In this way, the absorber 4 can be raised high within the range between the second virtual line X2 and the third virtual line X3, and the body fluid to which the absorber 4 is most closely adhered to the raised portion. It can correspond to the dent of the discharge port, for example, the vaginal opening. As a result, the absorbent article 1 can be fitted more closely according to the shape of the body, and the body fluid can be captured more reliably.

In addition, the location where the squeeze groove is formed and the absorber around it are compacted and tend to be relatively hard. Therefore, when the second squeezing groove is continuously formed along the virtual line Y inside the first squeezing groove, the double squeezing groove passes through the body fluid discharge port corresponding region 30 or its vicinity. It will extend in the front-back direction. In that case, the portion where the flexibility of the absorber is reduced (hardened) tends to hit the skin at the body fluid discharge port and its vicinity. Since the skin at the body fluid discharge port and its vicinity is particularly soft and delicate, a feeling of discomfort is likely to occur when a portion having low flexibility hits the skin.

On the other hand, in the embodiment of FIG. 1, the rear end of the front portion 21a of the second squeezing groove 21 is terminated by the second virtual line X2, and the front end of the rear portion 21b of the second squeezing groove 21 is terminated by the third virtual line X3. A region is formed in the range between the second virtual line X2 and the third virtual line X3, which is terminated and the second squeezing grooves 21 and 21 do not exist. Therefore, it is possible to prevent the portion of the absorber 4 hardened by the squeezing groove from hitting the skin in the body fluid discharge port and the region in the vicinity thereof, and as a result, a more comfortable wearing feeling can be obtained.

The distance between the second virtual line X2 and the third virtual line X3 is the form shown in FIG. 1 (the position where the distance between the pair of first squeezing grooves 11 and 11 is the minimum is near the body fluid discharge port corresponding region 30). ), It is preferably 20 to 50 mm, and more preferably 25 to 40 mm. Within the above range, the highest raised portion can be tightly fitted to the dent of the body fluid discharge port such as the vaginal opening.

The ratio of the distance between the first virtual line X1 and the second virtual line X2 and the distance between the first virtual line X1 and the third virtual line X3 is the use of the absorbent article 1, the material of the absorber 4, and the squeezing groove. It may be equal or different depending on the arrangement of. For example, it is preferable that (distance between the first virtual line X1 and the second virtual line X2): (distance between the first virtual line X1 and the third virtual line X3) = 1: 3 to 3: 1, preferably 1: 2. It is more preferable to set it to ~ 2: 1. Further, the above ratio is preferably 1: 1. With such a ratio, the first squeezing grooves 11 and 11 are absorbed in a well-balanced manner before and after the position where the distance in the width direction is minimized, that is, the position where the absorber 4 is most likely to rise due to the compressive force of both legs. You can liven up your body 4.

The distance between the first virtual line X1 and the second virtual line X2 and / or the distance between the first virtual line X1 and the third virtual line X3 can be 5 to 60 mm, and can be 7 to 54 mm. Also, it can be 10 to 40 mm. When the position where the distance between the pair of first squeezing grooves 11 and 11 is the minimum is near the body fluid discharge port corresponding region 30, as in the form of FIG. 1, the distance should be 5 to 45 mm. It can be 7 to 35 mm, preferably 10 to 25 mm.

In the absorbent article 1 of the present embodiment, the front squeezing groove 13 and the rear squeezing groove 15 extending in the width direction may be formed in the front and the rear, respectively. By forming the anterior compression groove 13 and the posterior compression groove 15, the transfer of the body fluid in the anterior and posterior directions can be controlled, and the leakage of the body fluid in the anterior and posterior directions can be prevented.

The front squeezing groove 13 may be connected to the front ends of the first squeezing grooves 11 and 11. Further, the rear squeezing groove 15 may be connected to each rear end of the first squeezing grooves 11 and 11. Further, an annular squeezing groove may be formed by connecting the first squeezing grooves 11, 11, the anterior squeezing groove 13, and the rear squeezing groove 15. Since the outer squeezing groove has a continuous annular shape, it is possible to control the transfer of body fluid in all directions of the absorbent article 1 and prevent leakage.

Further, in the illustrated embodiment, the front end of the front portion 21a and the rear end of the rear portion 21b of the second squeezing groove 21 are both terminated in the region M, but the front portion 21a of the second squeezing groove 21 The front end and the rear end of the rear portion 21b may extend beyond the region M. For example, the front end of the front portion 21a of the second squeezing groove 21 may further extend forward and be connected to the front squeezing groove 13. Further, the front end of the front portion 21a of the second squeezing groove 21 may be curved outward in the width direction while extending forward and connected to the first squeezing groove 11. Similarly, the rear end of the rear portion 21b of the second squeezing groove 21 may extend further rearward and be connected to the rear squeezing groove 15. Further, the rear end of the rear portion 21b of the second squeezing groove 21 may be curved outward in the width direction while extending rearward and connected to the first squeezing groove 11. In this way, the front end of the front portion 21a of the second compression groove 21 is connected to the front compression groove 13 or the first compression groove 11, and / or the rear end of the rear portion 21b of the second compression groove 21 is the rear compression groove 15. Alternatively, when connected to the first squeezing groove 11, the effect of raising the main body 8 can be more reliably obtained in the front and / or the rear of the absorbent article 1.

FIG. 5 shows an absorbent article 501 according to another embodiment of the present invention. The form shown in FIG. 5 has the same configuration as the absorbent article 1 shown in FIG. 1, except for the shape of the second squeezing grooves 521 and 521. That is, the absorbent article 501 includes a main body 508 having a front surface sheet 503, a back surface sheet, and an absorber provided between them, and a squeezing groove recessed from the front surface sheet 503 side to the back surface sheet side is formed. .. The squeezing groove includes a pair of first squeezing grooves 511 and 511 that are concavely curved inward in the width direction and extend in the front-rear direction in a plan view.

Also in the form shown in FIG. 5, as in the form shown in FIG. 1, a pair of second squeezing grooves 521 and 521 are formed inside the pair of first squeezing grooves 511 and 511, and each second squeezing groove 521 is formed. , Has a front portion 521a and a rear portion 521b. Further, the front portion 521a and the rear portion 521b are formed in front of and behind the first virtual line X1 which is orthogonal to the center line CL and passes through a position where the distance between the pair of first squeezing grooves 511 and 511 is minimized, respectively. Has been done.

However, the form of FIG. 5 is different from the form of FIG. 1 in that the shapes of the pair of second pressing grooves 521 and 521 are different. That is, unlike the form of FIG. 1 in which all of the second squeezing 21 and 21 are on the virtual curve Y, the second squeezing grooves 521 and 521 have a portion on the virtual curve Y and a portion not on the virtual curve Y. (A portion beyond the second virtual line X2 or the third virtual line X3 described later) is included. Specifically, the front portion 521a and the rear portion 521b are varied on the intersection of the virtual curve Y and the second virtual line X2 and the intersection of the virtual curve Y and the third virtual line X3, respectively, and the virtual curve Y is changed. It deviates from.

The portion 521a'that crosses the second virtual line X2 of the front portion 521a rearward and the portion 521b' that crosses the third virtual line X3 of the rear portion 521b forward, respectively, are the inflection point of the front portion 521a and the rear portion 521b, respectively. From the inflection point of, it curves outward in the width direction and extends toward a position where the distance between the first squeezing grooves 511 and 511 in the first squeezing grooves 511 and 511 is minimized. The position where the distance between the first squeezing grooves 511 and 511 is minimized is the position where the first squeezing grooves 511 and 511 intersect with the first virtual line X1. Specifically, the first squeezing groove 511, It is an intersection P of the center line in the longitudinal direction of 511 (a line passing through the midpoint of the width of the groove 511 and along the longitudinal direction of the groove 511) and the first virtual line X1.

With such a configuration of the second squeezing grooves 521 and 521, a region where the distance between the second squeezing grooves 521 and 521 is expanded is formed. Therefore, when the main body 508 receives the compressive force from both legs, the height at which the absorber rises in the region where the distance between the second squeezing grooves 521 and 521 is expanded can be increased as compared with the regions before and after that. can. As a result, the absorber can be brought into close contact with the hollow of the body, and the body fluid can be captured more reliably. This effect is as described in detail with reference to FIGS. 1 to 4.

In addition, since the squeezing grooves are not densely packed in the vicinity of the body fluid discharge port corresponding area 530, it is possible to prevent a decrease in the flexibility of the absorber. It is possible to prevent a feeling of strangeness that occurs when it hits the skin in the vicinity, and it is possible to improve the feeling of wearing. This point is also the same as the form of FIG.

In the embodiment of FIG. 5, the lengths of the portion 521a'that crosses the second virtual line X2 of the front portion 521a rearward and the portion 521b' that crosses the third virtual line X3 of the rear portion 521b forward are the lengths of the front portion 521a, respectively. And about one-eighth of the length of the rear portion 521b. However, the lengths of the portion 521a'that exceeds the second virtual line X2 of the front portion 521a and the portion 521b' that exceeds the third virtual line X3 of the rear portion 521b are particularly limited as long as they do not exceed the first virtual line X1. Not done.

FIG. 6 shows an absorbent article 601 in yet another form. The form shown in FIG. 6 has the same configuration as the absorbent article 1 shown in FIG. 1 or the absorbent article 501 shown in FIG. 5, except for the shapes of the second pressing grooves 621 and 621. That is, the absorbent article 601 includes a main body 608 having a front surface sheet 603, a back surface sheet, and an absorber provided between them, and a squeezing groove recessed from the front surface sheet 603 side to the back surface sheet side is formed. .. The squeezing groove includes a pair of first squeezing grooves 611, 611 that are concavely curved inward in the width direction and extend in the front-rear direction in a plan view.

Further, a pair of second squeezing grooves 621 and 621 are formed inside the pair of first squeezing grooves 611 and 611, and each second squeezing groove 621 is orthogonal to the first virtual line (orthogonal to the center line CL and is paired). It has an anterior portion 621a and a posterior portion 621b formed in front of and behind the virtual line) X1 passing through a position where the distance between the first squeezing grooves 611 and 611 is minimized.

Similar to the embodiment shown in FIG. 5, the pair of second squeezing grooves 621 and 621 includes a portion on the virtual curve Y and a virtual curve Y instead of all of the second squeezing grooves 621 and 621 on the virtual curve Y. A portion not above (a portion beyond the second virtual line X2 or the third virtual line X3 described later) is included. Specifically, the front portion 621a and the rear portion 621b are varied on the intersection of the virtual curve Y and the second virtual line X2 and the intersection of the virtual curve Y and the third virtual line X3, respectively, and the virtual curve Y is changed. It deviates from.

The portion 621a'that crosses the second virtual line X2 of the front portion 621a rearward and the portion 621b' that crosses the third virtual line X3 of the rear portion 621b forward are the inflection points and the rear portion of the front portion 621a, respectively. From the inflection point of 621b, it curves outward in the width direction and extends toward a position where the distance between the first squeezing grooves 611 and 611 in the first squeezing grooves 611 and 611 is minimized. The position where the distance between the first squeezing grooves 611 and 611 is minimized is the position where the first squeezing grooves 611 and 611 intersect with the first virtual line X1, and specifically, the first squeezing grooves 611 and 611. It is an intersection P between the center line in the longitudinal direction and the first virtual line X1.

In the embodiment shown in FIG. 6, the lengths of the portion 621a'that crosses the second virtual line X2 of the front portion 621a rearward and the portion 621b' that crosses the third virtual line X3 of the rear portion 621b forward are shown in FIG. It is longer than the shown form and extends to a position (intersection point P) where the distance between the first squeezing grooves 611 and 611 on the first squeezing grooves 611 and 611 is minimized.

As described above, since the front portion 621a and the rear portion 621b extend to the intersection P while curving, they are absorbed from the front-rear direction within the range between the second virtual line X2 and the third virtual line X3. You can create a starting point to raise your body high. Thereby, within the range between the second virtual line X2 and the third virtual line X3, the region where the distance between the second squeezing grooves 621 and 621 is expanded can be more reliably raised.

Further, since the bending direction of the portion 621a'that crosses the second virtual line X2 of the front portion 621a rearward and the portion 621b' that crosses the third virtual line X3 of the rear portion 621b forward is outward in the width direction. It is possible to prevent the squeezing grooves from concentrating in the vicinity of the area corresponding to the body fluid discharge port, and to prevent the main body 608 having reduced flexibility from hitting the body fluid discharge port and the skin in the vicinity thereof.

In the embodiment of FIG. 6, the front portion 621a and the rear portion 621b of the second squeezing groove 621 are connected at the intersection P, but the front portion 621a and the rear portion 621b do not have to be connected to each other. However, since the front portion 621a and the rear portion 621b of the second squeezing groove 621 are connected on the first squeezing groove 611, the rigidity of the absorber near the first squeezing grooves 11 and 11 can be increased. , The absorber can be raised more reliably, and the raised shape can be well maintained.

FIG. 7 shows an absorbent article 701 in another form. The absorbent article 701 has a longer overall length than the forms shown in FIGS. 1, 5 and 6, and in particular, the rear region R has a longer length. The absorbent article 701 is used for so-called night use or long-term use.

The absorbent article 701 includes a main body 708 having a front surface sheet 703, a back surface sheet, and an absorber provided between the front surface sheet 703, and has a squeezing groove recessed from the front surface sheet 703 side to the back surface sheet side. It is formed. The squeezing groove includes a pair of first squeezing grooves 711, 711 that are concavely curved inward in the width direction and extend in the front-rear direction. Further, a pair of second squeezing grooves 721 and 721 are formed inside the pair of first squeezing grooves 711 and 711, and each of the second squeezing grooves 721 is orthogonal to the first virtual line (a pair orthogonal to the center line CL). It has an anterior portion 721a and a posterior portion 721b formed in front of and behind the virtual line) X1 passing through a position where the distance between the first squeezing grooves 711 and 711 is minimized.

The second squeezing 721 and 721 are formed on a pair of virtual curves Y extending in the front-rear direction, as in the form of FIG. Further, the rear end of the front portion 721a and the front end of the rear portion 721b are terminated by the second virtual line X2 and the third virtual line X3, respectively, and are separated from each other in the front-rear direction. Therefore, a region in which the second squeezing grooves 721 and 721 do not exist is formed inside a predetermined range before and after the position where the distance between the first squeezing grooves 711 and 711 is minimized.

With the above configuration, at the position within the range between the second virtual line X2 and the third virtual line X3, the position outside the range between the second virtual line X2 and the third virtual line X3 before and after the position. In comparison with, the absorber can be raised higher in the thickness direction of the absorbent article 701. Such an effect is as described with reference to FIGS. 1 to 4.

In the form of FIG. 7, the first virtual line X1 is located in the rear region R, unlike the form of FIG. 1. That is, the position where the distance between the pair of first squeezing grooves 711 and 711 is minimized is further rearward. A predetermined area in front of and behind this position is applied to the body so as to enter the buttock crevice when the absorbent article 701 is attached.

In the absorbent article 701, the side portion of the absorbent article 701 is easily bent at the time of mounting due to the pair of the first squeezing grooves 711 and 711 that are concavely curved inward in the width direction and extend in the front-rear direction. Since the area between the squeezing grooves 711 and 711 can be raised, the main body 708 can enter the crevice in the buttocks and improve the fit. However, if the raised height of the absorber is uniform in the anteroposterior direction, the absorber cannot be fitted along the roundness in the anterior-posterior direction in the buttock crack, and a gap is created, which may not sufficiently prevent leakage. be.

On the other hand, with the above-mentioned configuration of the second squeezing grooves 721 and 721, the absorber can be raised to the highest height within the range between the second virtual line X2 and the third virtual line X3, and the buttock crack is deep. It can be brought into close contact with the place. Therefore, the fit of the absorbent article 701 in the rear can be improved, and leakage in the rear can be satisfactorily prevented.

In the embodiment of FIG. 7, the distance between the second virtual line X2 and the third virtual line X3 is preferably 25 to 50 mm. By setting the above range, the highest raised portion can be fitted well to the depth of the buttock crack.

Similar to the modes of FIGS. 1, 5 and 6, the ratio of the distance between the first virtual line X1 and the second virtual line X2 and the distance between the first virtual line X1 and the third virtual line X3 is 1. : 3 to 3: 1 is preferable, and 1: 2 to 2: 1 is more preferable. Further, the above ratio is preferably 1: 1. Further, the distance between the first virtual line X1 and the second virtual line X2 can be 5 to 60 mm, 7 to 54 mm, and 20 to 40 mm.

In the form of FIG. 7, a front squeezing groove 723 and a rear squeezing groove 725 extending in the width direction may be formed in the front and the rear, respectively. By forming the anterior compression groove 723 and the posterior compression groove 725, it is possible to control the transfer of the body fluid in the anterior and posterior directions, respectively, and it is possible to prevent the leakage of the body fluid in the anterior and posterior directions.

The front squeezing groove 723 may be connected to the front ends of the second squeezing grooves 721 and 721. Further, the rear squeezing groove 725 may be connected to each rear end of the second squeezing grooves 721 and 721. The inner squeeze groove can control the transfer of body fluid diagonally anteriorly and diagonally posteriorly to the absorbent article 701, which is continuous in the anterior and posterior directions, and can enhance the effect of preventing leakage.

1, 501, 601, 701 Absorbent article 2 Back sheet 3, 503, 603, 703 Front surface sheet 4 Absorber 5 Enclosed sheet 7, 507, 607, 707 Side non-woven fabric 8, 508, 608, 708 Main body (absorbent article) Body)
11, 511, 611, 711 1st squeezing groove (outer anterior-posterior squeezing groove)
13, 513, 613, 713 Anterior squeezing groove (outer anterior squeezing groove)
15, 515, 615, 715 posterior squeezing groove (outer posterior squeezing groove)
21,521,621,721 Second squeezing groove (inner anterior-posterior squeezing groove)
21a, 521a, 621a, 721a Front part of the second squeezing groove 21b, 521b, 621b, 721b Rear part of the second squeezing groove 521a', 621a'Part of the front part of the second squeezing groove beyond the second virtual line X2 521b', 621b' 723 anterior squeezing groove (inner anterior squeezing groove) beyond the third virtual line X3 in the rear part of the second squeezing groove.
725 Rear squeeze groove (inner rear squeeze groove)
CL Front-back direction center line P Intersection point between the first virtual line X1 and the longitudinal center line of the first squeezing groove WG Wing X1 First virtual line X2 Second virtual line X3 Third virtual line Y Virtual curve

Claims (7)

An absorbent article comprising a main 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.
The main body has an elongated shape having a predetermined length in the front-rear direction and a predetermined width in a direction orthogonal to the front-rear direction.
The main body is formed with a squeezing groove recessed from the front surface sheet side to the back surface sheet side.
The squeezing groove
A pair of first squeezing grooves extending in the front-rear direction, curved inward in the width direction in a line-symmetrical manner with the center line extending in the front-rear direction of the main body as the axis of symmetry.
Inside the pair of first squeezing grooves, there is a pair of second squeezing grooves formed on a pair of virtual curves extending in the anteroposterior direction in line symmetry with the center line as the axis of symmetry.
The second squeezing groove has an anterior portion and a posterior portion, respectively.
A second line, which is orthogonal to the center line and passes through a position where the distance between the pair of first squeezing grooves is minimized, is separated forward and backward from the first virtual line and is parallel to the first virtual line, respectively. When using a virtual line and a third virtual line
The distance between the second virtual line and the third virtual line is 20 to 80 mm, and the distance is 20 to 80 mm.
The rear end of the front portion and the front end of the rear portion are terminated by the second virtual line and the third virtual line, respectively.
An absorbent article in which no squeezing groove exists in the range between the second imaginary line and the third imaginary line inside the pair of first squeezing grooves. An absorbent article comprising a main 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.
The main body has an elongated shape having a predetermined length in the front-rear direction and a predetermined width in a direction orthogonal to the front-rear direction.
The main body is formed with a squeezing groove recessed from the front surface sheet side to the back surface sheet side.
The squeezing groove
A pair of first squeezing grooves extending in the front-rear direction, curved inward in the width direction in a line-symmetrical manner with the center line extending in the front-rear direction of the main body as the axis of symmetry.
Inside the pair of first squeezing grooves, there is a pair of second squeezing grooves including a portion formed on a pair of virtual curves extending in the anteroposterior direction in line symmetry with the center line as the axis of symmetry.
The second squeezing groove has an anterior portion and a posterior portion, respectively.
A second line, which is orthogonal to the center line and passes through a position where the distance between the pair of first squeezing grooves is minimized, is separated forward and backward from the first virtual line and is parallel to the first virtual line, respectively. When using a virtual line and a third virtual line
The distance between the second virtual line and the third virtual line is 20 to 80 mm, and the distance is 20 to 80 mm.
The front part and the rear part are inflections on the intersection of the virtual curve and the second virtual line and the intersection of the virtual curve and the third virtual line, respectively.
The portion of the front portion that crosses the second virtual line rearward and the portion of the rear portion that crosses the third virtual line forward are the inflection points of the front portion and the inflection points of the rear portion, respectively. Is curved outward in the width direction and extends halfway to reach the position toward the position where the distance between the first squeezing grooves in the first squeezing groove is minimized.
An absorbent article in which no squeezing groove is present within the range of the rear end of the front portion and the front end of the rear portion in the anteroposterior direction inside the pair of first squeezing grooves. An absorbent article comprising a main 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.
The main body has an elongated shape having a predetermined length in the front-rear direction and a predetermined width in a direction orthogonal to the front-rear direction.
The main body is formed with a squeezing groove recessed from the front surface sheet side to the back surface sheet side.
The squeezing groove
A pair of first squeezing grooves extending in the front-rear direction, curved inward in the width direction in a line-symmetrical manner with the center line extending in the front-rear direction of the main body as the axis of symmetry.
Inside the pair of first squeezing grooves, there is a pair of second squeezing grooves including a portion formed on a pair of virtual curves extending in the anteroposterior direction in line symmetry with the center line as the axis of symmetry.
The second squeezing groove has an anterior portion and a posterior portion, respectively.
A second line, which is orthogonal to the center line and passes through a position where the distance between the pair of first squeezing grooves is minimized, is separated forward and backward from the first virtual line and is parallel to the first virtual line, respectively. When using a virtual line and a third virtual line
The distance between the second virtual line and the third virtual line is 20 to 80 mm, and the distance is 20 to 80 mm.
The front part and the rear part are inflectioned on the intersection of the virtual curve and the second virtual line and the intersection of the virtual curve and the third virtual line, respectively.
The portion of the front portion that crosses the second virtual line rearward and the portion of the rear portion that crosses the third virtual line forward are the inflection points of the front portion and the inflection points of the rear portion, respectively. Is curved outward in the width direction and extends toward the position where the distance between the first squeezing grooves in the first squeezing groove is minimized.
An absorbent article in which the rear end of the front portion and the front end of the rear portion are connected to the first squeezing groove at the position where the distance between the first squeezing grooves is minimized. Claims 1 to 3, wherein the ratio of the distance between the first virtual line and the second virtual line and the distance between the first virtual line and the third virtual line is 1: 3 to 3: 1. The absorbent article according to any one. The absorbent article according to claim 1 or 2, wherein the distance between the first squeezing groove and the second squeezing groove in the width direction is 2 to 15 mm. A front squeezing groove and a rear squeezing groove extending in the width direction are formed in front of and behind the main body, respectively.
The absorption according to any one of claims 1 to 5, wherein the front end and the rear end of the first squeezing groove are connected to the front squeezing groove and the rear squeezing groove, respectively, to form an annular groove. Sex goods. A front squeezing groove and a rear squeezing groove extending in the width direction are formed in front of and behind the main body, respectively.
The absorbent article according to any one of claims 1 to 5, wherein the front end and the rear end of the second squeezing groove are connected to the front squeezing groove and the rear squeezing groove, respectively.

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