CN104220031B - absorbent article - Google Patents

Abstract

An absorbent article (1) is provided with a pressing portion (80) formed by compressing a surface sheet (10) and an absorbent body (30) in a thickness direction. The pressing portion (80) comprises a pair of first-length pressing portions (81) and a pair of second-length pressing portions (82), wherein the pair of first-length pressing portions (81) are arranged at positions further outwards in a width direction (W) than a central area (CA); and the pair of second-length pressing portions (82) are arranged at positions further outwards in a width direction (W) than the first-length pressing portions (81). A plurality of second curved portions (86) having a convex shape toward the outside in the width direction (W) are continuously provided on the second length extrusion portion (82) along the length direction (L), and the ends of the second curved portions (86) in the length direction (L) are provided on a center line (CACL) passing through the center of the central area (CA) in the length direction (L) and along the width direction (W), and the ends (86L) of each second curved portion (86) in the length direction (L) are arranged at a position closer to the inside in the width direction (W) than the outer ends of each second curved portion (86) in the width direction (W).

Description

absorbent article

technical field

The present invention relates to absorbent articles such as sanitary napkins.

Background technique

Patent Document 1 and Patent Document 2 disclose sanitary napkins as absorbent articles including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber arranged between the top sheet and the back sheet. In the absorbent article of Patent Document 1, channels in which the top sheet and the absorber are compressed in the thickness direction are formed. The channel is formed in an annular shape so as to surround an excretory opening abutting area that abuts on the wearer's excrement opening.

In addition, the absorbent article of Patent Document 2 discloses a sanitary napkin having a flexible shaft in which a top sheet and an absorber are compressed in the thickness direction. The flexible shaft is formed in an arc shape protruding toward the inner side in the width direction on both outer sides in the width direction of the excretory port abutting region.

The excretory opening contact region of the absorber is located in the crotch of the wearer in a state of being worn by the wearer, and is arranged to be sandwiched between the legs of the wearer. The wearer's legs or the like sandwich the absorber and apply a force from the outside in the width direction to the inside in the width direction, thereby deforming the annular passage or the flexible shaft inward.

prior art literature

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 2008-541943 (FIG. 1 etc.)

Patent Document 2: Japanese Patent Application Laid-Open No. 10-99372 (FIG. 1 etc.)

Contents of the invention

The problem to be solved by the invention

However, the above-mentioned absorbent article has the following problems.

For example, the excrement opening abutting area described in Patent Document 1 is surrounded by an elliptical annular channel, and the entire excrement opening abutting area is compressed inward by the channel, thereby reducing the width of the excrement opening abutting area.

In addition, in the absorbent article described in Patent Document 2, the pair of flexible shafts has an arcuate shape, and the distance between the pair of flexible shafts is the shortest in the longitudinal center of the excretory opening contact region. Therefore, the stress concentrates on the longitudinal center of the excrement port abutting region, and the width at the longitudinal center of the excrement port abutting region tends to be shortened. In this way, when the width of the excretion port abutting region is locally shortened, the absorber cannot be disposed facing the excretion port, and leakage of bodily fluid may occur. Also, in the longitudinal direction, when the wearing position of the absorbent article is misaligned, the portion where the distance between the pair of flexible shafts becomes shorter is not arranged corresponding to the excretory opening contact area, and the fit cannot be improved.

Technical solutions for solving problems

In addition, in recent years, absorbent articles have begun to spread even in developing countries and emerging countries. As a result of the present applicant's investigation of usage patterns in developing countries and the like, it was found that there are wearers who are reluctant to carry absorbent articles around in countries that have just begun to spread. In addition, it was found that even for wearers who have no resistance to carrying absorbent articles, there are some wearers who cannot properly replace absorbent articles because the environment for changing absorbent articles at the destination is not perfect, or there is no place to discard them. Such a wearer may wear the absorbent article for a longer period of time during the day than a wearer who carries the absorbent article with him and changes it as appropriate.

When the daytime wearing time becomes longer, the number of times it is sandwiched by the legs increases during walking, etc., and the absorber is repeatedly compressed inward in the width direction. When the absorbent article is repeatedly compressed inward in the width direction, the width of the absorber becomes shorter, and the absorber cannot be arranged at a position facing the excretion opening, or the absorber hardens. In this way, there is a problem that leakage of bodily fluid occurs when the absorber cannot be disposed facing the excretion opening. In addition, there was a problem that, when the excretory opening contact region of the absorbent body was hardened, the wearing feeling deteriorated or the fit property deteriorated.

Therefore, the present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide an absorbent article that can improve the durability of the absorbent article, and can ensure absorbent performance even when used for a long time during the day, and improve Fit and feel.

In order to solve the above-mentioned problems, the absorbent article (absorbent article 1) of the present invention has a liquid-permeable top sheet (top sheet 10), a liquid-impermeable back sheet (back sheet 20), and a top sheet disposed on the top sheet. The absorbent body (absorbent body 30) between the back sheet and the back sheet is formed with an extruded portion formed by compressing the top sheet and the absorbent body in the thickness direction of the absorbent article, wherein the extruded portion The pressing part has a pair of first length pressing parts (first length pressing parts 81) and a pair of second length pressing parts (second length pressing parts 82), and the pair of first length pressing parts (second length pressing parts 82) A length pressing portion 81) is arranged on both sides in the width direction of the absorbent article from the central region (central region CA) including the center of the excretory opening abutting area disposed opposite to the wearer's excretory opening. and extending along the longitudinal direction of the absorbent article; a pair of second length extrusions (second length extrusions 82) are disposed closer to the width than the first length extrusions direction, and extend along the length direction, on the second length extruded part, a plurality of curved parts having a convex shape toward the outside in the width direction are continuously provided along the length direction (the second curved line 86), the end of the longitudinal direction of the curved portion (the longitudinal end 86L of the second curved portion 86) is provided at the center line passing through the longitudinal center of the central region and along the width direction (center line CACL), the longitudinal end of each curved portion is arranged on the inner side in the width direction than the outer end of each curved portion in the width direction.

The effect of the invention

According to the absorbent article of the present disclosure, there is provided an absorbent article capable of improving the durability of the absorbent article, ensuring absorbent performance even when used for a long time during the day, and improving fit and wearing feeling.

Description of drawings

Fig. 1 is a plan view of the absorbent article according to the first embodiment seen from the skin contact surface side.

Fig. 2 is a schematic sectional view of the section A-A shown in Fig. 1 .

Fig. 3 is an enlarged plan view of a pressing portion of the absorbent article shown in Fig. 1 .

Fig. 4 is a diagram schematically showing a deformation mode of the absorbent article shown in Fig. 1 .

detailed description

The absorbent article 1 of the embodiment will be described with reference to the drawings. Fig. 1 is a plan view of an absorbent article, and Fig. 2 is a sectional view taken along line A-A shown in Fig. 1 . The absorbent article 1 of this embodiment is, for example, a sanitary napkin.

The absorbent article of the embodiment is a daily sanitary napkin. Therefore, in the absorbent article according to the present embodiment, the lengths of the front area FA located on the front side of the wearer and the rear area BA located on the back side of the wearer in the longitudinal direction are substantially the same.

In addition, the area between a pair of wing parts mentioned later is the central area CA which includes the excrement opening abutting area which the wearer's excrement opening abuts. The area on the front side of the central area CA is the front area FA, and the area on the rear side of the central area CA is the rear area BA.

In addition, in this embodiment, although the sanitary napkin for daily use is taken as an example and demonstrated, the absorbent article of this invention can also be applied to the sanitary napkin for night use. The sanitary napkin for night use is configured such that the rear area BA located on the rear side of the wearer is longer than the front area FA located on the front side of the wearer in the longitudinal direction.

The absorbent article 1 has: a top sheet 10 that contacts the wearer's skin; a liquid-impermeable back sheet 20 that does not allow liquid to pass through; and an absorber 30 . The absorber 30 is arranged between the topsheet 10 and the backsheet 20 . Therefore, the absorber 30 is shown by the dotted line in FIG. 1 and FIG. 2 . The absorber 30 is arranged at the central portion in the longitudinal direction L and the width direction W of the absorbent article 1 .

The absorbent article 1 has wing portions 43 and 44 provided outside the absorber 30 in the width direction W perpendicular to the longitudinal direction L in the plan view shown in FIG. 1 . Furthermore, the absorbent article 1 has the side panels 41 and 42 provided outside the absorber 30 in the width direction W. As shown in FIG.

The topsheet 10 is a liquid-permeable sheet through which liquids such as body fluids pass. The top sheet 10 covers at least the surface of the absorber 30 . The surface sheet 10 is not particularly limited as long as it is a sheet-like material having a liquid-permeable structure such as a nonwoven fabric, a woven fabric, a porous plastic sheet, and a mesh sheet. Any of natural fibers and chemical fibers can also be used as the material of the woven fabric and the nonwoven fabric.

Examples of natural fibers include cellulose such as ground pulp and cotton. Examples of chemical fibers include regenerated cellulose such as rayon and fibrillated rayon, semi-synthetic cellulose such as cellulose acetate and triacetate, thermoplastic hydrophobic chemical fibers, or thermoplastic hydrophobic chemical fibers that have been hydrophilized. Sexual chemical fiber.

Examples of the thermoplastic hydrophobic chemical fibers include monofilaments such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). PE and PP are graft-polymerized to obtain Synthetic fibers, composite fibers such as core-sheath structures.

In addition, especially for non-woven fabrics, the fiber web forming method can be any method of dry (carding, spunbonding, melt blown, air-laid, etc.) or wet, or a variety of combine. In addition, as a bonding method, methods such as a thermal bonding method, a needle punching method, and a chemical bonding method can be used, but are not particularly limited to these methods. In addition, a spunlace cloth formed into a sheet by a hydroentanglement method may also be used.

As the porous plastic sheet, a porous sheet of a thermoplastic resin such as PE, PP, or PET, a porous foam material, or the like can be used. In addition, these are preferably used by mixing fillers made of titanium dioxide, calcium carbonate, etc. in the range of 0.5 to 10% as needed to make them cloudy. In addition, a porous film in which a film made of the thermoplastic resin is perforated by perforation, heat embossing, machining, or the like may be used. The porous film can also be used as a composite sheet with a non-woven fabric.

The back sheet 20 has substantially the same length as the top sheet 10 . The back sheet 20 can use a polyethylene sheet, a laminated non-woven fabric mainly composed of polypropylene or the like, an air-permeable resin film, and a sheet in which an air-permeable resin film is bonded to a non-woven fabric such as a spun-bonded fabric or a spunlace fabric. Wait. The back sheet 20 is preferably made of a soft material that does not cause discomfort when worn. For example, it can be obtained from a low-density polyethylene (LDPE) resin with a basis weight of 15 to 30 ^g /m2. film. The back sheet 20 is preferably liquid-impermeable and moisture-permeable, and can be composed of, for example, a microporous sheet obtained by stretching a material obtained by melt-mixing an inorganic filler with an olefin resin such as polyethylene or polypropylene.

The absorber 30 contains hydrophilic fiber and pulp. The absorber 30 is formed of a material capable of absorbing body fluids such as menstrual blood. For example, ground pulp, cellulose such as cotton, regenerated cellulose such as rayon and fibrillated rayon, semi-synthetic cellulose such as acetate fiber and triacetate fiber, particulate polymer, and fibrous polymer can be used alone or in combination. , thermoplastic hydrophobic chemical fibers, or thermoplastic hydrophobic chemical fibers that have been hydrophilized, air-laid pulp that has been chemically bonded, and the like.

The method of forming these materials into an absorbent body is not particularly limited, and materials formed into sheets by, for example, air-laid method, melt-blown method, spunlace method, or paper-making method can be used. In addition, as the absorber, a cellulose foam, a continuous foam of a synthetic resin, and the like can also be used. Furthermore, it is also possible to use a material formed into an absorbent body after pulverizing the foam or the above-mentioned sheeted material. Among them, pulp is 80% to 100% and particulate polymer is 20% to 0%. After covering with tissue paper, it has a weight per unit area of 100% by embossing and sheeting. Absorbent body of ~2000 g/m ² , thickness of 1 ~ 50 mm. Embossing is used to prevent deformity of the absorber, and the embossing area ratio is in the range of 10 to 100%, preferably in the range of 30 to 80%.

The absorber 30 can also be formed by laminating hydrophilic fibers or powders by air-laying, or an air-laid sheet formed by forming hydrophilic fibers or powders into a sheet by air-laying. The pulverized pulp mixed with the superabsorbent polymer can be placed on tissue paper (for example, having a basis weight of 15 g/m ² ), and wrapped with tissue paper.

Furthermore, other examples of the material of the thin absorber include an absorbent sheet and a polymer sheet, and the thickness thereof is preferably 0.3 to 5 mm. As the absorbent sheet and the polymer sheet, generally, they can be used without particular limitation as long as they are used for absorbent articles such as sanitary napkins.

Examples of the absorbent sheet include pulp sheets obtained by converting absorbent paper, non-woven fabrics, and fiber sheets with binders, etc., and examples of the polymer sheet include pulverized pulp and fibers mixed with particulate polymers. Sheets and the like in the form of flakes. In addition, as a sheet formed by mixing a particulate polymer with fibers, any of a structure in which the particulate polymer is dispersed in a layered form and a structure in which the particulate polymer is dispersed in a three-dimensional form can be used.

As the fiber used as the material for forming the absorbent sheet and the polymer sheet, cellulose fibers such as wood pulp, regenerated cellulose fibers such as rayon and rayon, hydrophilic synthetic fibers such as polyvinyl alcohol fibers and polyacrylonitrile fibers are preferred, Alternatively, polyethylene, polypropylene, polyethylene terephthalate, polyethylene/polypropylene composite fiber, polyethylene/polyethylene terephthalate, in which the surface of the fiber is hydrophilized by a surfactant, etc. The conjugate fiber is more preferably a cellulose fiber from the viewpoint of maintaining good hydrophilicity.

As the particulate polymer used in the polymer sheet, it is preferable to absorb and retain more than 20 times its own weight of liquid and gelatinize the material. As such an example, starch, cross-linked carboxymethylated cellulose, polyester Acrylic acid and its salts, polyacrylate grafted polymers, etc.

The absorber 30 of the present embodiment is constituted by wrapping pulp obtained by laminating cotton pulp, synthetic pulp, etc. at a basis weight of about 100 to 300 g/m ² with a protective paper (not shown). The protective paper is used to maintain the shape of pulp, and crepe paper, thin paper, etc. can be used, for example.

The absorber 30 has a shape extending in the front-rear direction, and is substantially smaller than the back sheet 20 by about one circle. The length of the absorber 30 in the width direction W corresponds to the crotch interval of an adult female, and is approximately 50 to 80 mm. The absorber 30 is bonded to the back sheet 20 with an adhesive such as hot-melt adhesive.

The side sheets 41 and 42 are arranged on both sides of the top sheet 10 . The side sheets 41 and 42 can be selected from the same materials as the top sheet 10 . However, in order to prevent menstrual blood from flowing outside the absorbent article 1 beyond the side sheets 41 and 42, it is preferable to have hydrophobicity or water repellency. The side sheets 41 and 42 cover part of the side edges of the absorber 30 and the wing parts 43 and 44 .

In the absorbent article 1 , the peripheries of the top sheet 10 , the side sheets 41 , 42 , and the back sheet 20 are bonded, and the absorber 30 is sealed inside. As a joining method of the topsheet 10 and the backsheet 20, any one or combination of thermal embossing, ultrasonic waves, or hot-melt adhesives can be used.

In the back sheet 20, an adhesive (not shown) is applied to a plurality of regions on the surface that contacts the underwear. The adhesive is intermittently arranged along the longitudinal direction L on the back side of the absorber. The adhesive is also provided on the surfaces of the wing portions 43 and 44 that come into contact with the underwear. In the state before use, the adhesive is in contact with an unillustrated release sheet. The release sheet prevents the adhesive from deteriorating before use. And, at the time of use, the wearer peels off the release sheet.

In addition, in an absorbent article that does not have a release sheet, the adhesive agent can be prevented from deteriorating before use by the packaging sheet that individually wraps the absorbent article. When the adhesive is in contact with the packaging sheet, it is preferable that the surface of the packaging sheet can be treated to peel off the adhesive without reducing the adhesive force of the adhesive.

The compressed part 80 which compressed the top sheet 10 and the absorber 30 in the thickness direction is formed in the absorbent article 1. As shown in FIG. The pressed portion 80 is a groove formed by processing the skin-contacting side of the top sheet of the absorbent article 1 and the non-skin-contacting side (clothes-contacting surface side) of the absorber 30 .

The extruded portion is formed in a line shape having a predetermined width by a low extruded portion and a high extruded portion (not shown). The high compression part is compressed with a force higher than that of the low compression part, and it is comprised so that it may arrange|position in parallel at intervals, and shall form a constant line as a whole. The low compression part is compressed with a force lower than that of the compression part, and can be provided in a region including a linear shape composed of a plurality of high compression parts.

In addition, the pressing part 80 may be formed including the high pressing part and the low pressing part, and may be formed so that the whole may be compressed by the same force. In addition, the extruded part may be compressed from the surface sheet side toward the back sheet side, or may be compressed from the back sheet side toward the surface sheet side, or may form an extruded part compressed from the surface sheet side toward the back sheet side and a compressed part from the back sheet. The pinch where the sheet side is compressed towards the facing sheet side.

The position where the pressing part 80 is provided should just be the area|region where an absorber is arrange|positioned. The shape of the extruded part 80 can also exemplify a circle or an ellipse that surrounds a certain area with a curve, a polygon that surrounds a certain area with a plurality of fold lines, a circle, or an extension in the lengthwise or widthwise direction. straight lines and curves.

Dimensions in the thickness direction of the pressing part 80 (in the mode where the pressing part is formed on both the skin contacting surface side and the clothing contacting surface side, the dimension from the skin contacting surface side and from the clothing contacting surface of the absorber The total depth of the dimension from the side) is preferably 0.1 mm to 20 mm, but only needs to be shallower than the thickness of the absorbent article. In addition, the depth of the groove on the skin-contacting surface side only needs to be 20 to 80% of the thickness of the absorbent article, but considering the fluidity of the liquid and the deformability using the groove as the starting point of bending, it is preferably 30 to 60%. .

In addition, the thicknesses of the high compression part and the low compression part on the clothes contact surface side of the absorber only need to be 5 to 20% of the thickness of the absorbent article, and the depth of the low compression part needs to be lower than that of the high compression part. Just small. When the depth of the squeezed portion on the clothing contact surface side is smaller than 5%, the deformability and flexibility of the squeezed portion deteriorate. On the other hand, when it is larger than 20%, the pressed portion itself becomes too deep and becomes fragile.

Specifically, the depth of the squeezed portion in an absorbent article with a thickness of 7 mm is preferably 4 mm for the squeezed portion on the clothing contact surface side, 0.2 mm for the low squeezed portion on the clothing surface side, and 0.8 mm for the high squeezed portion. .

The shape of the extruded part on the side of the clothing contact surface can be dotted, meshed, elliptical, etc., but when the low extruded part and the high extruded part are alternately arranged, when using the reticulated groove, processing easy. The size of the extrusion part is 0.5 mm ² to 100 mm ² , and the pitch of the extrusion part is preferably 0.5 mm to 3 mm.

Specifically, it is 0.64 mm ² when the shape of the high extrusion part is a rhombus, 1.92 mm ² when the low extrusion part adopts a mesh shape surrounding the high extrusion part, and 0.8 mm for the high extrusion part. The pitch repeats.

As the processing method of the extrusion part 80, the following methods are mentioned, for example. The pressed portion is formed by passing between the embossing rolls facing in the up and down direction, and being pressed in the up and down direction by the embossing rolls. On the contact surface of the upper embossing roll with the skin contact surface side of the absorbent article, one-stage substantially elliptical grooves having continuous depths are arranged. On the contact surface of the lower embossing roller and the clothing contact surface side of the absorbent article, grooves having two levels of depth are arranged.

In addition, the processing method of the pressing part is not limited to this, and the pattern shape of two stages of depth may be changed by inverting the rolls up and down, or the embossing conditions such as temperature and the distance between the rolls may be adjusted appropriately.

The pressing part 80 is provided around the central area CA including the center of the excrement opening abutting area arranged to face the wearer's excrement opening. The extruded part 80 has a first length extruded part 81 , a second length extruded part 82 , a first width extruded part 83 and a second width extruded part 84 . FIG. 3 is an enlarged view of the pressing portion 80 in the plan view shown in FIG. 1 .

In addition, the center of the excretory opening abutting area means that the center of the central area CA in contact with the excrement opening of the wearer coincides with the center in the longitudinal direction and the width direction. For example, in an absorbent article having wings, the center of the longitudinal direction of the wings becomes the center of the longitudinal direction of the central region. Moreover, in the absorbent article which does not have a wing part, the position where the longitudinal dimension of the width direction of an absorber is the shortest becomes the center of the longitudinal direction of a central region. In addition, the excretory port abutting region is included in the region abutting against the wearer's crotch portion, and is located between the wearer's legs.

The first length pressing portion 81 is arranged on both outer sides in the width direction than the central area CA, and extends in the length direction. A pair of first length pressing portions 81 are arranged at intervals in the width direction. On the first length pressing portion 81, there is provided a first curved portion 85 having a convex shape toward the inner side in the width direction. The first curved portion 85 extends inward in the width direction as it goes from both end portions in the longitudinal direction of the first length extruded portion 81 toward the center in the longitudinal direction. Therefore, the longitudinal center 81CL of the first length extruded portion 81 is located at the innermost side in the width direction in the first length extruded portion 81 .

In addition, the first length pressing part may have the first curved part, or may not have the first curved part, and may be formed in a linear shape extending in the longitudinal direction. In addition, although the first curved portion has an arc shape toward the inside in the width direction, it does not necessarily have to be an arc shape.

The first width extruded portion 83 is provided between the pair of first length extruded portions 81 to connect the first length extruded portions 81 to each other. Specifically, the first width extruded portion 83 is arranged so as to connect the front end portions of the pair of first length extruded portions 81 , and is arranged so as to connect the rear end portions of the first length extruded portion 81 . The first width pressing portion 83 is configured. The first length extruded portion 81 and the first width extruded portion 83 are arranged continuously and form a ring shape in plan view. The central area CA is an area surrounded by the first length extruded portion 81 and the first width extruded portion 83 .

The second length extruded portion 82 is disposed on both outer sides in the width direction than the first length extruded portion 81 , and extends in the longitudinal direction. A pair of second length pressing portions 82 are arranged at intervals in the width direction.

On the second length extruded portion 82, two second curved portions 86 having a convex shape outward in the width direction are continuously provided along the length direction. The second curved portion 86 extends outward in the width direction as it goes from both ends in the length direction to the center in the length direction. Therefore, the longitudinal center 86CL of the second curved portion 86 is located on the outermost side in the width direction of each second curved portion, and the longitudinal end portion 86L of each second curved portion 86 is located on the innermost side in the width direction of each second curved portion. The second curved portion has an arc shape facing outward in the width direction, but it does not necessarily have to be an arc shape.

In the second length extruded portion 82 , two second curved portions 86 are arranged continuously, and the longitudinal end 86L of one second curved portion 86 coincides with the other longitudinal end, so that the second length extruded portion 82 Three longitudinal end portions 86L of the second curved portion 86 are provided on the top.

Three longitudinal ends 86L of the second curved portion are provided, and one of them is provided on a center line CACL passing through the longitudinal center of the central area CA and along the width direction. The absorbent article of this embodiment is a sanitary napkin for daily use, and the longitudinal length of the front region is the same as the longitudinal length of the rear region, so that the longitudinal center of the central region is the longitudinal center of the absorbent body, And it becomes the center of the longitudinal direction of the absorbent article 1.

The second width extruded portion 84 is provided between the pair of second length extruded portions 82 to connect the pair of second length extruded portions 82 . Specifically, the second width extruded portion 84 is arranged to connect the front end portions of the pair of second length extruded portions 82 in the front area FA of the absorbent article, and the second width extruded portion 84 is arranged in the rear area BA of the absorbent article. The second width extruded portion 84 is disposed so as to connect the rear side end portions of the pair of second length extruded portions 82 to each other. The second length extruded portion 82 and the second width extruded portion 84 are arranged continuously and form a ring shape in plan view. The second length extruded portion 82 and the second width extruded portion 84 are arranged to surround the first length extruded portion 81 and the first width extruded portion 83 .

The first length extruded portion 81 and the second length extruded portion 82 may also be formed obliquely with respect to the straight line along the longitudinal direction L, and the first length extruded portion 81 or the second length extruded The angle (acute angle side) formed by the portion 82 is 45 degrees or less. On the other hand, the first width extruded portion 83 and the second width extruded portion 84 may be formed obliquely with respect to the straight line along the width direction W, and the straight line along the width direction W and the first width extruded portion 83 or the second The angle (acute angle side) formed by the two-width extruded portion 84 is smaller than 45 degrees.

In addition, the length extruded part and the width extruded part may be connected as in embodiment, and may be arrange|positioned separately. Specifically, the first width extruded portion 83 may be separated from the first length extruded portion 81 and arranged outside the first length extruded portion 81 in the longitudinal direction, or may be separated from the first length extruded portion 81 . It is separated and arranged on the inner side in the width direction than the first length pressing portion 81 . In addition, the second width extruded portion 84 may be separated from the second length extruded portion 82 and disposed on the outside in the longitudinal direction than the second length extruded portion 82 , or may be separated from the second length extruded portion 82 and disposed on the outer side of the second length extruded portion 82 . It is located on the inner side in the width direction than the second length pressing portion 82 .

In addition, the radius of curvature of the first curved portion 85 is larger than the radius of curvature of the second curved portion 86 , and the convex portion of the first curved portion 85 is a gentler curve than the convex portion of the second curved portion 86 . In a plan view, the distance between the first length extruded portion 81 and the second length extruded portion 82 is closest at the longitudinal end of the second curved portion 86 and farthest at the longitudinal center of the second curved portion 86 . FIG. 3 shows the distance D1 between the longitudinal end of the second curved portion and the first long extruded portion, and the distance D2 between the longitudinal center of the second curved portion and the first longitudinal extruded portion.

The width direction length of the 2nd length extrusion part 82 is longer than the width direction length of the 1st length extrusion part 81. As shown in FIG. FIG. 3 shows the length W1 of the first length extruded portion in the width direction and the length W2 of the second length extruded portion in the width direction.

Here, the length in the width direction of the first length pressing portion 81 and the length in the width direction of the second length pressing portion 82 are the lengths in the state where the absorbent article 1 according to the present embodiment is stretched to such an extent that wrinkles cannot be seen. .

Hereinafter, the deformation|transformation form of the absorbent article comprised in this way is demonstrated. FIG. 4 is a diagram schematically showing a modification mode of a state in which the absorbent article 1 is worn on the underwear S. As shown in FIG. Fig. 4(A) is a state before deformation, and Fig. 4(B) is a deformed state when the absorbent article is sandwiched between legs and the like, and the absorbent article is pressed from the widthwise outer side toward the widthwise inner side.

The compressed portion 80 is formed by compressing at least the top sheet 10 and the absorber 30 in the thickness direction, and is a relatively hard portion. Therefore, in the state shown in FIG. 4(A) , when a force is applied to the absorbent article 1 inward in the width direction, the force propagates inward in the width direction via the second length pressing portion 82 . At this time, the inner end in the width direction of the second length extruded portion is the longitudinal end 86L of the second curved portion 86 at three places, and when force is applied to the second length extruded portion 82, the force is concentrated at the three places. The longitudinal end 86L of the second curved portion is dispersed from the longitudinal end 86L of the second curved portion, and the stress propagates.

For example, in the case where there is one inner end in the width direction in the second length extruded portion, the stress is concentrated at this one point, and the concentrated position is locally deformed. For example, when the stress is concentrated at one place in the longitudinal center of the excretory port contact region, the width of the longitudinal center of the excretory port contact region is partially shortened, and the absorber cannot be arranged facing the excretory port, resulting in leakage of body fluids. , the absorber 30 will harden.

However, force is applied to the longitudinal end 86L of the second curved portion at three locations, and the stress is dispersed and propagated, whereby stress concentration can be suppressed. Therefore, the durability of the absorbent article is improved, and even when the absorbent article 1 is used for a long period of time, hardening of the absorbent body can be suppressed, and only the width of the excretory opening contact region can be suppressed from being shortened.

Also, the force from the widthwise outer side to the widthwise inner side propagates to the first lengthwise pressing portion 81 via the second lengthwise pressing portion 82 , and presses the central region CA widthwise inwardly via the first lengthwise pressing portion 81 . At this time, the rigidity of the central region CA is lower than that of the first length pressing portion 81 and the second length pressing portion 82 and is easily deformed, so that it is pushed inward in the width direction through the first length pressing portion and the second length pressing portion. Press to bulge toward the wearer's skin-contacting side. Fig. 4(B) is a diagram showing a state of swelling toward the wearer. The central area CA protrudes toward the wearer, whereby the absorber can be disposed close to the wearer, and body fluids can be quickly absorbed.

In addition, since a plurality of ends in the longitudinal direction of the second curved portion are arranged, each of which is shifted in the longitudinal direction, even when the absorbent article is arranged to be shifted toward the front side or the rear side, any second curved portion can be used. The end portions in the longitudinal direction disperse stress and compress the absorber inward in the width direction.

In addition, the longitudinal end of the second curved portion 86 is located at the inner end in the width direction of the second length extruded portion 82 , and the distance from the first length extruded portion 81 is shortened. The longitudinal end of the second curved portion 86 is closer to the first length extruded portion 81 and the second length extruded portion 82 than the front and rear portions thereof, and the rigidity becomes higher. Thus, by making the rigidity of the longitudinal end part of the 2nd curved part 86 easy to apply force high, deformation|transformation of the 2nd length pressing part can be suppressed, and the durability of an absorbent article can be improved.

In addition, since the first width pressing portion 83 and the second width pressing portion 84 extending in the width direction are provided, when a force is applied from the outside in the width direction toward the inside in the width direction, deformation to the inside in the width direction can be suppressed, and Suppresses hardening of the excretory port abutment area. In particular, by providing the second width extruded portion connecting the second length extruded portion on the outer side and providing the annular extruded portion on the outer side, it becomes easy to maintain the outer shape of the product. Furthermore, the stress from the outer side toward the inner side in the width direction can be dispersed along the annular pressing portion, and local hardening can be suppressed.

In addition, by providing the first width pressing portion 83 connecting the first length pressing portion 81, when a force is applied from the outside in the width direction toward the inside in the width direction, deformation to the inside in the width direction can be suppressed, and the discharge opening can be suppressed. Hardening of the abutment area.

Since the radius of curvature of the first curved portion 85 is smaller than the radius of curvature of the second curved portion 86, the first-length extruded portion has a gentler curve than the second-length extruded portion. Therefore, it is possible to suppress local stress concentration in the longitudinal center of the excretory port abutting region, and make it easier to bulge the whole between the first length pressing portions, thereby suppressing hardening of the absorber due to local stress concentration.

One of the ends in the longitudinal direction of the plurality of second curved portions is arranged on the centerline CACL passing through the center in the longitudinal direction of the central region and along the centerline in the width direction so that the wearer can grasp the central position of the excretory port abutting region. , become the benchmark when wearing. Therefore, the wearer can easily arrange the absorbent article at the correct position, and it is possible to prevent misalignment of the wearing position. By arranging the absorbent article appropriately, the designed absorption performance can be exhibited.

Since the width of the second-length squeezed portion is longer than that of the first-length squeezed portion, when a force is applied from the side of the absorber, the second-length squeezed portion is easily maintained in a flat state, enabling the absorber to In a state where the side of the absorbent body faces the wearer's excrement opening, the center of the absorbent body is raised.

In addition, the hardness of an absorbent article etc. can be measured using the Gurley method prescribed|regulated to JIS-1096, for example. In addition, the basis weight and density of an absorber can be measured by the following measuring method, for example. In the absorbent article packaged in the package, the package was opened, the folded absorbent article was unfolded, and the thickness and area of the portion where the basis weight and density were measured were measured. Then, the part where the basis weight and density were measured was cut out from the absorbent article, and the weight of the cut part was measured. Then, parts other than the absorber such as the top sheet and the back sheet are removed from the cut-out portion, and the weight of the absorber is reduced. The basis weight was calculated based on the weight of the absorber and the area of the portion where the basis weight and density were measured. The density was calculated based on the weight per unit area and the thickness.

In addition, the thickness can be measured by the following measuring method. Specifically, after the absorbent article of the sample was immersed in liquid nitrogen and frozen, it was cut with a razor and returned to normal temperature, and then measured at a magnification of 50 times using an electron microscope (for example, Keyence VE7800). Here, the reason for freezing the sample absorbent article is to prevent thickness fluctuations due to compression during cutting.

Hereinafter, a part of the manufacturing method of the absorbent article 1 according to the embodiment will be described. In addition, for methods not described, existing methods can be used. The manufacturing method of an absorbent article implements a top sheet production|generation process as a 1st step.

Then, as a second step, a surface sheet bonding step is implemented. Specifically, the surface sheet and the side sheets 41, 42 are bonded by, for example, heat welding.

As a third step, an absorber molding step is carried out. Specifically, the absorbent body 30 is molded by molding the pulp used as the material of the absorbent body with a molding drum. In addition, the order of the manufacturing process of the top sheet of the 1st step and the 2nd step, and the absorber molding process of the 3rd step may be reversed order.

In the fourth step, a bonding process is carried out. Specifically, the joining process of joining the absorber formed in the 3rd step, and the top sheet and side sheet joined in the 2nd step is implemented.

In the fifth step, an extrusion process is carried out. Specifically, the absorber 30 and the top sheet 10 are compressed in the thickness direction to form the pressed portion 80 .

In the sixth step, a back sheet joining process is implemented. Specifically, the absorber, the top sheet, and the like in which the squeezed portion is formed, and the back sheet are joined. After bonding the back sheet, there is a step of applying an adhesive. Through the above steps, the absorbent article of this embodiment can be manufactured.

As mentioned above, although the content of this invention was disclosed through embodiment of this invention, it should not understand that this invention is limited to the description and drawing which make a part of this indication. It is obvious for those skilled in the art that various alternative embodiments, examples, and operation techniques can be obtained from this disclosure.

For example, the extruded portion may have at least the first length extruded portion and the second length extruded portion, and may not have the first width extruded portion and/or the second width extruded portion. In addition, there may be three or more second curved portions of the second length extruded portion.

The first length pressing part may have not only the first curved part but also a straight part arranged in a straight line. The second length pressing part may have not only the second curved part but also a straight part arranged in a straight line.

In addition, the absorbent article is not limited to a sanitary napkin, and may be an absorbent pad or a panty liner. In addition, for example, in an absorbent article, gathers may be formed on the outer end in the width direction of the absorber.

Explanation of reference signs

CA central region

FA front area

BA posterior area

L length direction

S underwear

T thickness direction

W width direction

1 absorbent article

10 surface sheets

20 back pieces

30 absorber

41, 42 side panels

43, 44 wings

80 extrusion part

81 First length extrusion

82 Second length extrusion

83 first width extrusion

84 Second width extrusion

85 first curve

86 Second curve section.

Claims (6)

1. An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet, and is formed with the top sheet and a compressed portion formed by compressing the absorbent body in the thickness direction of the absorbent article, wherein the absorbent article is characterized in that The extruded portion has: a pair of first length extruded portions and a pair of second length extruded portions; The central area within the center of the excretory opening abutting area is closer to the two outer sides in the width direction of the absorbent article, and extends along the length direction of the absorbent article; the pair of second length extrusions are arranged on both sides of the width direction than the first length extruded portion, and extending along the length direction, On the first length pressing part, a first curved part having a convex shape toward the inner side in the width direction is provided, On the second length extruded part, a plurality of second curved parts having a convex shape toward the outside in the width direction are continuously provided along the length direction, end portions constituting boundaries of the plurality of second curved portions in the length direction are disposed on a center line passing through the length direction center of the central region and along the width direction, The first curved portion extends along the inner side in the width direction from both ends of the first length extrusion portion in the longitudinal direction toward the center in the longitudinal direction, Ends of the plurality of second curved portions in the longitudinal direction are disposed on the inner side in the width direction than outer ends of the plurality of second curved portions in the width direction, The radius of curvature of the first curved portion is larger than the respective radii of curvature of the plurality of second curved portions. 2. The absorbent article according to claim 1, wherein the squeezed portion has a width squeezed portion extending in the width direction of the absorbent article. 3. The absorbent article of claim 2, wherein the width extrusion has a second width extrusion connecting the pair of second length extrusions. 4. The absorbent article according to claim 2 or 3, wherein the width extrusion has a first width extrusion connecting the pair of first length extrusions. 5 . The absorbent article according to claim 1 , wherein the length in the width direction of the second length pressing portion is longer than the length in the width direction of the first length pressing portion. 6. The absorbent article according to claim 1, wherein the central region is configured such that when a force is applied to the central region from the outside in the width direction toward the inside in the width direction, The first length pressing portion and the second length pressing portion are pressed inward in the width direction and can bulge toward the wearer's skin contact surface side.