TWI603722B - Absorbent article - Google Patents

Description

Absorbent article

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

Patent Document 1 discloses a sanitary napkin having a liquid-permeable surface sheet, a liquid-impermeable back sheet, and an absorbent article disposed between the surface sheet and the back sheet, wherein A sanitary napkin for pressing the surface sheet and the concave portion of the absorbent body in the thickness direction. The concave portion of the absorbent article is formed in plural in the entire absorbent body. Thereby, the thickness of the absorbent article is thinner than the absorbent article which does not form the concave portion pressed in the thickness direction. Therefore, for example, even if the basis weight of the absorber is increased to improve the absorption performance, the thickness of the absorber can be made relatively thin.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2009-291473 (FIG. 1, FIG. 4(b), etc.)

However, the above absorbent article has the following problems. Since the absorber of the above-mentioned absorbent article has a density formed by forming a concave portion, the density of the entire absorbent body is increased. Therefore, the absorbent body becomes hard, and the feeling of the skin is deteriorated to the user, and the feeling of use may be deteriorated.

Moreover, when the user who installs the absorbent article holds the legs, etc., When the force is applied to the inner side from the outer side in the wide direction of the absorbent article, the center of the absorbent body is deformed in a convex shape in the longitudinal direction. For example, in an absorbent article having a relatively small thickness (for example, 3 mm or less), when the center of the absorbent body in the wide direction is convexly deformed, the deformed convex portion is liable to become sharp. Therefore, there is a feeling that the convex portion may feel pain when it touches the user, or the convex portion may irritate the skin, and there is a concern that the feeling of use is deteriorated. Further, when the convex portion is formed along the longitudinal direction, the absorbent body is less likely to bend along the outer shape of the body in the front-rear direction, and the adhesion may be lowered. Further, there is a case where the body fluid flows along the convex portion along the long direction, and there is a concern that the body fluid is diffused or the liquid leakage occurs.

Here, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide an absorbent article which can improve the adhesive performance and improve the fit and use feeling.

In order to solve the above problems, the absorbent article of the present invention has a liquid-permeable surface sheet (surface sheet 10), a liquid-impermeable back sheet (back sheet 20), and a surface sheet and the inside. An absorbent article of the absorbent body (absorbent body 30) between the sheets, wherein the absorbent body has a central region (central region A1) including a center of the discharge port abutment region; and a periphery of the central region and the center The region is adjacent to the surrounding region (surrounding region A2) in which the density of the absorber in the peripheral region is lower than the density of the absorber in the central region, and the central region is provided with the absorber in the thickness direction. Central press section (central press section 61).

[Formation for carrying out the invention] (First embodiment)

An absorbent article according to a first embodiment of the present invention will be described with reference to Figs. 1 and 2 . 1 is a plan view of an absorbent article, and FIG. 2 is a rear view of the absorbent article. The absorbent article 1 of the present embodiment is, for example, a sanitary napkin.

The absorbent article 1 has a surface sheet 10 that abuts against the skin of the user, a liquid-impermeable back sheet 20 that is impermeable to liquid, and an absorbent body 30. The absorber 30 is disposed between the surface sheet 10 and the back sheet 20. Therefore, the absorber 30 is indicated by a broken line in FIG. The absorber 30 is disposed in a central portion of the absorbent article 1 in the longitudinal direction L and the width direction W. Moreover, the absorbent article 1 is provided with wing portions 43 and 44 provided on the outer side of the absorber 30 in the width direction W orthogonal to the longitudinal direction L in the plan view shown in FIG. 1 . Further, the absorbent article 1 is provided with side sheets 41 and 42 provided on the outer side of the absorber 30 in the width direction W.

The surface sheet 10 is a liquid-permeable sheet that transmits a liquid such as a body fluid. The surface sheet 10 is a surface covering at least 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 perforated plastic sheet, or a mesh sheet. As the material of the woven fabric or the non-woven fabric, any of natural fibers and chemical fibers can be used.

The inner sheet 20 has a length substantially the same as the length of the surface sheet 10. The inner sheet 20 can be used: polyethylene sheet, polypropylene, etc. The laminate of the main body is not woven; a sheet of a breathable resin film is bonded to a nonwoven fabric such as a breathable resin film, a spun bond, or a spunlace. It is preferable that the inner sheet 20 is made of a material having a degree of flexibility that does not cause a strange feeling when it is used. The inner sheet 20 is preferably liquid impermeable and moisture permeable. For example, it can be composed of a microporous sheet in which an inorganic filler is melt-kneaded in an olefin resin such as polyethylene or polypropylene by stretching treatment.

The absorber 30 contains hydrophilic fibers and pulp. The absorbent body 30 is formed of a material that can absorb body fluid such as menstrual blood. The absorbent body 30 can also be formed by laminating hydrophilic fibers or powders by a gas flow molding method. The hydrophilic fiber or the powder may be formed into a sheet-like air-laid sheet by a gas flow molding method, or a pulverized pulp mixed with a high-absorbent polymer may be disposed on a thin paper (for example, a basis weight of 15 g/m ² ) and wrapped in a thin paper. The way it is formed.

The absorbent body 30 of the embodiment of the present invention is constituted by a pulp paper 8 such as a cotton pulp or a synthetic pulp having a laminated base amount of 100 to 300 g/m ² in a protective paper (not shown). The thickness of the core portion 31 (see, for example, FIG. 3) located at the center in the wide direction of the absorber 30 is thicker than the thickness of both side portions in the wide direction. The state of the absorber 30 before the second molding process of the absorber described later may be a substantially uniform thickness, or may be a non-uniform thickness. The protective paper is for maintaining the shape of the pulp and preventing the spread of the absorbed body fluid, for example, crepe paper or the like can be used.

The absorber 30 has a shape that extends in the front-rear direction and is slightly smaller than the inner sheet 20. The length of the absorbent body 30 in the width direction W corresponds to the crotch spacing of an adult female, and is approximately 50 to 80 mm. The absorber 30 is followed by a sheet 20 by an adhesive such as hot melt. About the absorbent body 30 After detailed description.

The side sheets 41, 42 are disposed on both sides of the surface sheet 10. The side sheets 41, 42 can be selected from the same material as the surface sheet 10. However, in order to prevent the menstrual blood flowing over the side sheets 41 and 42 toward the outside of the absorbent article 1, it is desirable to have hydrophobicity or water repellency. The side sheets 41, 42 cover a portion of the side edges of the absorbent body 30 and the wings 43, 44.

In the absorbent article 1, the peripheral edges of the surface sheet 10, the side sheets 41, 42 and the back sheet 20 are joined, and the absorbent body 30 is sealed. The joining method of the surface sheet 10 and the back sheet 20 may be either a hot embossing process, an ultrasonic wave, or a hot-melt type adhesive, or a combination of plural numbers.

In the inner sheet 20, an adhesive 50 is applied to a plurality of regions on the surface in contact with the undergarment (see Fig. 2). The adhesive 50 is intermittently disposed along the longitudinal direction L of the inner sheet 20. The adhesive 50 is also provided on the surface of the wing portion 43 and the wing portion 44 that is in contact with the undergarment. In the state before use, the adhesive 50 contacts a release sheet (not shown), and the deterioration of the use of the pre-adhesive is prevented by peeling off the sheet. Moreover, the release sheet is peeled off by the user during use. Further, in the absorbent article which does not have the release sheet, the deterioration of the use of the pre-adhesive agent can be prevented by individually packing the packaging sheet of the absorbent body. When the subsequent agent comes into contact with the packaging sheet, it is preferred to apply the adhesive to the surface of the packaging sheet without lowering the adhesive strength of the adhesive.

Next, the configuration of the absorber 30 will be described in detail with reference to FIGS. 3 and 4 . FIG. 3 is a plan view of the absorbent body 30 in a state in which the surface sheet 10, the back sheet 20, and the side sheets 41 and 42 are removed from the absorbent article shown in FIG. Figure 4 is the A-A section shown in Figure 1. Cutaway view. The absorber 30 has a central area A1 including the center of the drain opening abutment region of the absorber 30 in the plan view shown in FIG. 3, and a peripheral area A2 disposed adjacent to the center area A1 around the center area A1; The periphery of the surrounding area A2 is adjacent to the thin layer area A3 in which the surrounding area is disposed. The elliptical two-dot chain line shown in Fig. 3 indicates the outer edge of the central area A1, and becomes the surrounding area A2 outside the two-point chain line. The elliptical one-dot chain line shown in FIG. 3 indicates the outer edge of the peripheral area A2, and becomes the thin layer area A3 outside the one-point chain line. The central area A1 and the surrounding area A2 are areas corresponding to the core portion 31 having a thick thickness of the absorber 30, and are a drain opening abutting area where the user's excretory opening abuts.

The center of the excretory opening abutment area refers to the center of the long direction and the wide direction of the area where the user's excretory opening abuts. For example, in the absorbent article having the wing portion, the center in the longitudinal direction of the wing portion becomes the center in the longitudinal direction of the discharge port abutment region. Further, in the absorbent article having no wing portion, the position where the length dimension of the absorbent body in the wide direction is the shortest is the center in the longitudinal direction of the excretory opening abutment region. The drain abutment region is included in an area that abuts the user's ankle and is located between the user's legs. The central area A1 only needs to include at least the center of the excretory opening abutment area, and the center of the central area A1 may be the center of the excretory opening abutting area, and the center of the central area A1 may not coincide with the center of the excretory opening abutting area. .

As shown in FIGS. 1 and 4, an outer press portion 62 that presses the absorber 30 and the surface sheet 10 in the thickness direction T is formed on the outer edge of the peripheral region A2. The outer edge of the surrounding area A2 is a boundary portion between the surrounding area A2 and the thin layer area A3, and includes not only the boundary but also the inner side of the boundary. a portion of the side portion and the outer portion. The peripheral press portion 62 is formed so as to surround the peripheral region A2 so as to distinguish the central region A1 and the peripheral region A2 corresponding to the core portion 31 from the thin layer region A3. Further, the peripheral press portion 62 is also provided in plural in the thin layer region A3 which is the outer side in the longitudinal direction L of the core portion.

The central area A1 is a center that constitutes a region where the excretory opening abuts. A central press portion 61 that presses the absorber 30 in the thickness direction T is formed in the central region A1 in plural. The central press portion 61 is formed in plural throughout the entire central area A1. By providing the central press portion 61 throughout the entire central region A1, it is easy to maintain the thickness of the absorber 30 in a thin state.

The length W6 of the central press portion 61 in the width direction W is longer than the length L6 of the longitudinal direction L of the center press portion 61. Since the length W6 of the central press portion 61 is formed to be relatively long, the resistance to the force from the outside in the wide direction is increased. Therefore, when the user of the absorbent article 1 is attached to the both sides in the wide direction of the absorbent article 1 and the like, the deformation of the central region A1 can be suppressed. On the other hand, since the longitudinal direction length L6 of the center press portion 61 is shorter than the width direction length W6, the absorber 30 is easily deformed in the front-rear direction. Therefore, the absorber 30 is easily bent along the outer shape of the user's body in the front-rear direction, and the fit of the absorbent article can be improved.

In the thin layer region A3, a thin laminated press portion 63 for pressing the absorbent body 30 in the thickness direction is provided. The thin laminated press portion 63 is formed in plural throughout the entire thin layer region A3. By providing the entire thin layer region A3 with the thin laminated press portion 63, the thickness of the absorber 30 can be easily maintained in a thin state in the thin layer region A3. The thin laminated press portion 63 has a length in the width direction and a length direction The first thin laminated press portion 63A having a longer length; and the second thin laminated press portion 63B having a longer length in the longitudinal direction than the length in the wide direction.

The first thin laminated press portion 63A has the same shape as the central press portion 61. Many of the first thin laminated press portions 63A are formed on the outer side in the longitudinal direction with respect to the core portion 31. Thereby, both sides in the longitudinal direction L of the absorber 30 can increase the resistance against the force from the outside in the wide direction, and can suppress the deformation due to the force from the outside in the wide direction. The second thin laminated press portion 63B is provided at the end portion on the width direction side of the absorber 30 adjacent to the core portion 31. The wide-direction side end portion of the absorber 30 adjacent to the core portion 31 is a portion corresponding to the crotch portion of the user, and is a portion that the inner portion of the user's crotch portion touches. When the rigidity of the absorber 30 of the part touched by the inner part of the user's crotch is too high, the feeling of the user's skin is deteriorated, and there is a concern that the feeling of wearing is deteriorated. However, since the second thin laminated press portion 63B is formed at the end portion in the width direction side of the absorber 30 adjacent to the core portion 31, the absorber is easily deformed in the longitudinal direction, and the deterioration of the feeling of attachment can be suppressed.

Further, the central press portion 61 and the thin laminate press portion 63 may be formed by pressing the absorber 30 in the thickness direction T, and various configurations may be employed. For example, it can be formed by press working or embossing, and its shape can also be a lattice mesh or a honeycomb shape. Further, the plurality of central press portions 61 and the thin laminated press portions 63 may be disposed close to each other or may be disposed apart from each other. More preferably, the plurality of central press sections 61 and the thin laminate press section 63 are preferably disposed apart from each other in consideration of maintaining the thickness of the absorber, not easily remaining the folding inertia, and maintaining the compliance. The central press portion 61 and the thin laminated press portion 63 are provided in the central region A1 and the thin layer region A3 of the absorber, whereby the entire absorbent body can be The thickness is thin. Therefore, for example, in order to improve the absorption performance, even when the basis weight of the absorber is increased, the thickness of the absorber can be maintained in a thin state. For example, the absorbent article of the embodiment of the present embodiment can be suitably used for an absorbent article having a thickness of 3 mm or less.

As shown in FIG. 4, the thickness of the absorber differs in the central area A1, the surrounding area A2, and the thin layer area A3, respectively. The thickness of the central area A1 is thinner than the thickness of the surrounding area A2, and is thicker than the thin layer area A3. Specifically, the thickness of the central area A1 is 2.0 mm, the thickness of the surrounding area A2 is 2.2 mm, and the thickness of the thin layer area A3 is 1.0 mm. Further, the thickness of the peripheral press portion 62 formed between the peripheral region A2 and the thin layer region A3 is 0.3 mm.

Since the thickness of the central portion which is easily abutted against the excretory opening is thinner than the thickness of the surrounding area, the thickness of the absorbent body 30 can be easily perceived by the user, and the feeling of attachment can be improved. In addition, the surface on the inner sheet side of the central area A1 and the surrounding area A2 is located on the outer side in the thickness direction of the surface on the inner sheet side of the thin layer area A3. Since the core portion 31 formed by the central region A1 and the surrounding region A2 is thicker than the thin layer region A3, the user tends to feel thick. However, the absorber of the central region A1 and the peripheral region A2 corresponding to the core portion 31 is more expanded toward the inner sheet side than the absorbent body of the thin layer region A3, whereby the swelling toward the skin contact surface side can be suppressed, and the surface can be made The side of the sheet looks refreshed, making it difficult for the user to feel the thickness.

Further, the thickness of the absorbent body and the absorbent article can be measured, for example, by the following method. First, the absorbent article is impregnated with liquid nitrogen to freeze the absorbent article. Next, the razor is used to cut the frozen absorbent article. Thereafter, the cut absorbent article is returned to normal temperature for thawing. Further, the thickness of the absorbent article in the cut surface was measured by an electron microscope (VE7800, manufactured by Keenes, Japan).

The central portion center width W1 of the length in the width direction of the central region A1 in the center of the longitudinal direction L of the central region A1 is a width constituting the peripheral region A2 located in the center of the longitudinal direction L of the central region A1. The width of the surrounding area in the center of the direction is shorter than W2. Since the center width W1 of the center area is longer than the center W2 of the surrounding area, it is possible to ensure the area where the body fluid is absorbed and to prevent leakage of body fluid.

Further, the center width W2 of the surrounding area means the width of the surrounding area A2 passing through the center of the longitudinal direction L of the central area A1 and on the imaginary line along the wide direction W. In the embodiment of the present embodiment, the peripheral area A2 on the imaginary line is disposed on both sides with the central area A1 interposed therebetween, and the length of the two surrounding areas A2 disposed on the side of the central area A1 is a combined ratio. The central area center is wider than W1.

In the absorbent body of the present invention, when the peripheral region A2 is disposed on both sides in the wide direction with respect to the central region A1, at least the length in the width direction of the peripheral region A2 on one side is longer than the length in the width direction of the central region. Short. However, it is more preferable that the length of the two surrounding areas A2 disposed outside the wide direction of the central area A1 is shorter than the length of the central area A1 in the width direction. The length in the longitudinal direction and the length in the width direction of the central portion A1 are set to 50% or more with respect to the length in the longitudinal direction of the core portion 31 and the length in the width direction, whereby the thickness can be appropriately perceived for the user. effect. Again, only in relation to When the surrounding area A2 is disposed on one side in the wide direction of the central area A1, the length in the wide direction of the surrounding area A2 may be shorter than the length in the width direction of the central area.

The density of the absorber is different in the central region A1, the peripheral region A2, and the thin layer region A3, respectively. The density of the absorber 30 in the peripheral area A2 is lower than the density of the absorber of the central area A1, and is lower than the density of the absorber of the thin layer area A3. The density of the absorber in the central region A1 is higher than the density of the absorber constituting the thin layer region A3. Specifically, the density of the central region A1 is 0.135 g/cm ³ , the density of the peripheral region A2 is 0.068 g/cm ³ , and the density of the thin layer region A3 is 0.12 g/cm ³ . Further, the density of the surrounding press section was 0.4 g/cm ³ .

The central area A1 is harder than the surrounding area A2 and the thin layer area A3, and the configuration is not easily deformed. On the other hand, since the peripheral area A2 having a lower density than the central area A1 and the thin layer area A3 is provided around the central area A1, the least rigid surrounding area is pressed when the absorbent article is pressed from the outer side in the wide direction toward the inside. The A2 is deformed to absorb the external force, and the deformation of the central area A1 can be reduced. Therefore, it is easy to maintain the planar state in which the central region A1 faces the excretory opening, and to secure the region in contact with the excretory opening, and it is possible to prevent the length in the width direction of the absorbent body from becoming too short. Further, by suppressing the deformation of the central region, it is possible to suppress the deterioration of the sense of attachment due to the bending of the relatively hard central region A1 toward the body side.

Further, the hardness of the absorbent body and the absorbent article can be measured, for example, by using the Gurley method prescribed in JIS-1096. Further, in the absorber 30 of the present embodiment, the density of the central region A1 is higher than that of the thin layer region A3. However, the rigidity of the thin layer region A3 may be higher than that of the central region A1.

The basis weight of the absorber is different in the central region A1, the peripheral region A2, and the thin layer region A3, respectively. The absorbent body 30 has the highest basis weight in the central region A1 which is located at the center of the absorbent body. The basis weight of the surrounding area A2 is higher than the basis weight of the thin layer area A3. Specifically, the basis weight of the central region A1 is 270 g/cm ² , the basis weight of the peripheral region A2 is 150 g/cm ² , and the basis weight of the thin layer region A3 is 120 g/cm ² . Further, the basis weight of the surrounding press section was 120 g/cm ² . Since the base weight and the density of the central region of the absorbent body which easily contact the excretory opening are high, the body fluid is easily pulled in the central region A1. Further, since the density of the absorber constituting the surrounding area A2 is lower than that of the center area A1, it is possible to suppress the diffusion of the liquid absorbed in the central area A1 due to the influence of the coarse gradient.

Further, the basis weight and density of the absorber can be measured, for example, by the following measurement method. In the absorbent article packaged by the package, the package is opened, and the folded absorbent article is unfolded, and the thickness and the measurement area of the portion of the basis weight and density are measured. Next, the portion where the basis weight and the density were measured was cut out from the absorbent article, and the weight of the cut portion was measured. Next, portions other than the absorber such as the surface sheet and the back sheet were removed from the cut portions, and the weight of the absorber was measured. The basis weight was calculated from the weight of the absorber and the area of the portion where the basis weight and density were measured. The density is calculated based on the basis weight and thickness.

Next, a part of the method of manufacturing the absorbent article 1 of the present embodiment will be described with reference to Fig. 5 . In addition, regarding the fact that it is not recorded in Figure 5 The method of loading can use the existing method. The manufacturing method of the absorbent article is as shown in FIG. 5, and in step 101, the upper layer production process is performed. Specifically, the upper layer is produced, for example, by the hot melt adhesive followed by the surface sheet 10 and the side sheets 41, 42. Next, in step 102, the first molding process of the absorber is performed. Specifically, the absorbent body 30A is molded by molding a pulp which is a material of the absorbent body by a molding drum (see FIG. 8( a )).

At step 103, the second molding process of the absorber is performed. Specifically, the absorber 30A molded in step 102 is subjected to compression processing in the thickness direction T by a pair of compression rolls to form a central area A1, a peripheral area A2, a thin layer area A3, and a central press section 61 is formed. The thin laminate press portion 63 is formed to form the absorbent body 30 (see Fig. 8(b)). Further, the upper layer forming process of step 101 may be reversed to the order of the first molding process of the absorbent body and the second molding process of the absorbent body in steps 102 and 103.

At step 104, the joining process of the upper layer generated in step 101 and the absorber 30B formed in step 103 is joined. The pressing process is carried out in step 105. Specifically, the absorber 30B and the surface sheet 10 are compressed in the thickness direction to form the peripheral press portion 62. At step 106, the inner sheet bonding process is performed. Specifically, in step 105, the absorbent body and the surface sheet forming the peripheral press portion are joined; and the inner sheet is bonded. Further, although not shown in Fig. 5, there is provided a process of applying an adhesive after bonding the inner sheet.

Next, the second project of the absorber molding in step 103 will be described in detail with reference to Fig. 6 . Fig. 6 is a perspective view showing a second process of forming an absorber of the absorber in a mode. Fig. 7 is a cross-sectional view showing a compression roller used in the second project of the absorbent body molding. Figure 7 is the upper side of the compression roller shown in Figure 6. A cross-sectional view of a cross section in a portion facing the lower roller and the lower roller, and a cross section along the vertical direction. Fig. 8 is a schematic cross-sectional view of the absorbent body, wherein (a) shows the absorbent body before the second molding of the absorbent body, and (b) shows the absorbent body after the second working of the absorbent body molding.

In the second process of the absorber molding, the absorber 30A continuously conveyed in the conveyance direction MD is subjected to compression processing in the thickness direction T between the pair of compression rolls. The compression roller 100 has an upper roller 101 and a lower roller 102 that are disposed opposite to each other. The upper roller 101 is disposed on the transported body. On the other hand, the lower roller 102 is disposed under the absorbent body to be conveyed. A mold that follows the outer shape of the absorber 30 is formed on the outer circumferential surfaces of the upper roller 101 and the lower roller 102. In the upper roller 101, a compression blade 101a that protrudes toward the lower roller side (outer side in the radial direction) is formed at a position corresponding to the central press portion 61 and the thin laminated press portion 63 of the absorber 30. The length W101a in the wide direction of the compression blade 101a corresponds to the length W1 in the wide direction of the central area A1. The lower roller 102 is formed with a concave portion 102a that is recessed in a direction (inward in the radial direction) separated from the upper roller. The length W102a in the intersecting direction of the concave portion 102a corresponds to the length W4 (see FIG. 8(a)) in the width direction W of the core portion 31.

As shown in Fig. 8 (b), the surface on the inner sheet side of the central region A1 and the peripheral region A2 of the absorber 30B is expanded toward the inner sheet side corresponding to the concave portion 102a. Thus, by forming a part of the absorber 30 to be expanded toward the inner sheet side, it is possible to reduce the swelling of the surface sheet side of the central region and the surrounding region. Further, in the core portion 31, only the portion corresponding to the central portion A1 is formed with the compression blade 101a, and the region corresponding to the surrounding region A2 is not formed. Since the blade 101a is compressed, only the central portion A1 forms the central press portion 61, and the thickness of the central portion A1 can be formed thinner than the peripheral region A2.

(Second embodiment)

Next, an absorbent article according to a second embodiment will be described in detail with reference to Figs. 9 and 10 . In the absorbent article according to the second embodiment, the configuration of the absorbent body is different from that of the first embodiment, and the other configurations are the same. FIG. 9 is a cross-sectional view of the compression roller used in the second embodiment of the absorbent body molding in the method for producing an absorbent article according to the second embodiment. Fig. 10 is a schematic cross-sectional view of the absorber 32 of the second embodiment, wherein (a) shows the absorber 32A before the second molding of the absorbent body, and (b) shows the absorber 32B after the second project of the absorber molding.

The compression roller 200 is an upper roller 201 and a lower roller 202 which are disposed to face each other. The upper roller 201 is disposed on the transported body. On the other hand, the lower roller 202 is disposed under the transported absorber. A mold that follows the outer shape of the absorber 30 is formed on the outer circumferential surfaces of the upper roller 201 and the lower roller 202. In the upper roller 201, a compression blade 201a that protrudes toward the lower roller side (outer side in the radial direction) over the entire width of the entire absorbent body is formed. The lower roller 202 is formed with a concave portion 202a that is recessed in a direction (the inner side in the radial direction) that is separated from the upper roller 201. The length W202a in the intersecting direction of the concave portion 202a is longer than the width direction length W4 of the core portion 31.

As shown in Fig. 8(b), the region corresponding to the concave portion of the absorbent body 32B is expanded toward the inner sheet side. The core portion 31 is pressed to have the same thickness throughout the entire length. Absorption in the width direction outer side with respect to the core portion 31 In the body, the thickness of the absorber 30A is thinner than that of the core portion 31, but in order to approach the concave portion 202a together with the core portion 31, the amount of compression is small as compared with the core portion 31. Therefore, the region corresponding to the core portion 31 has the highest density and becomes the central region A1. On the outer side in the width direction with respect to the central area A1, the portion in contact with the concave portion 201a has a lower density than the central portion A1 and becomes the peripheral area A2. Even in the absorbent article having the absorbent body configured as described above, the peripheral region A2 having a relatively low density can be provided around the central region A1, so that the peripheral region is deformed when the force is applied from the outside in the wide direction. It can suppress the deformation of the central area. Further, since the length W202a in the wide direction W of the concave portion is longer than the length W4 in the wide direction of the core portion 31, even in the manufacturing process, even if the position of the absorbent body is slightly different in the intersecting direction (for example, about 10 mm) At the same time, the central area and the surrounding area can also be formed.

As described above, the present invention is not limited by the scope of the present invention. It will be apparent from this disclosure that the industry has a variety of alternative embodiments, embodiments, and techniques of use.

The absorbent article of the present invention may be a sanitary pad (textile sheet), an incontinence pad, a disposable diaper, or the like in addition to the sanitary napkin. Further, for example, in the embodiment shown in the drawings, the shape and size of the central press section and the thin laminate section are the same, but the central region A1 and the thin layer region A3 have the required functions. Differently, the shape and size of the press section can be made different.

The absorber may or may not contain a polymer. Further, the absorber in the embodiment described above has a basis weight of 100 to 300 g/m ^{2 in} which a cotton pulp or a synthetic pulp is laminated, but the basis weight of the absorber may be in the range of 50 to 400 g/m ² . Suitable for adjustment. Further, the inner sheet of the absorbent article, the shape of the absorbent body, the materials, and the like are not limited to those shown in the embodiment, and for example, the side sheets may be provided with hem.

In addition, the present specification is added by referring to the entire contents of Japanese Patent Application No. 2011-055580 (filed on March 14, 2011).

[Industrial Applicable Type]

Since the peripheral region having a lower density than the central region is provided around the central region of the absorber, when the absorbent article is pressed from the outside in the width direction toward the inside, the peripheral region is deformed to absorb the external force, and the deformation of the central region can be reduced. Therefore, it is possible to easily maintain the state in which the central region is opposed to the drain port. Since the center of the absorber which is easily abutted at the excretory opening is disposed at a higher central portion than the surrounding area, the body fluid is easily pulled in the central region. Since the central press portion is provided in the central portion, the thickness near the center of the absorbent body which is easily contacted with the vicinity of the excretory opening can be made thin, and the feeling of attachment can be improved. By deforming the surrounding area, it is possible to reduce the deformation of the central region having a high density, and by bending the relatively hard central region toward the body side, it is possible to suppress the deterioration of the feeling of use. It is possible to provide an absorbent article which ensures the absorption performance and improves the fit and the feeling of use.

1‧‧‧Absorbables

10‧‧‧Surface

20‧‧‧ inside sheet

30, 30A, 30B, 32, 32A, 32B‧‧‧ absorbers

31‧‧‧ core

41, 42‧‧‧ side flakes

43, 44‧‧‧ wing

50‧‧‧Binder

61‧‧‧Central Press Division

62‧‧‧The surrounding press section

63‧‧‧Thin laminated press

75‧‧‧Adhesive tape

A1‧‧‧Central Area

A2‧‧‧ surrounding area

A3‧‧‧thin area

100,200‧‧‧Compression roller

101, 201‧‧‧ upper roller

101a, 201a‧‧‧ compression blade

102, 202‧‧‧ lower roller

102a, 202a‧‧‧ recess

[Fig. 1] The muscle of the absorbent article according to the first embodiment of the present invention A top view of the skin abutting side view.

Fig. 2 is a rear elevational view of the absorbent article shown in Fig. 1.

Fig. 3 is a plan view of the absorbent body shown in Fig. 1 as viewed from the skin contact surface side.

Fig. 4 is a schematic cross-sectional view showing the A-A cross section shown in Fig. 1 .

Fig. 5 is a view for explaining a method of manufacturing an absorbent article according to an embodiment of the present invention.

Fig. 6 is a view schematically showing a second process of forming an absorbent body in the method for producing an absorbent article shown in Fig. 1 .

Fig. 7 is a partially enlarged cross-sectional view showing the compression roller of the absorbent body molding process shown in Fig. 6.

FIG. 8 is a cross-sectional view schematically showing an absorbent body molded in the method for producing an absorbent article shown in FIG. 6 .

FIG. 9 is a partially enlarged cross-sectional view showing a compression roller of a second molding process of the absorbent body in the manufacturing process of the absorbent article according to the second embodiment.

FIG. 10 is a cross-sectional view schematically showing a molded absorbent body in the method for producing an absorbent article shown in FIG. 9.

30‧‧‧Acceptor

63B (63)‧‧‧2nd thin laminated press

A3‧‧‧thin area

61‧‧‧Central Press Division

A2‧‧‧ surrounding area

62‧‧‧The surrounding press section

W6‧‧‧ length

63A (63)‧‧‧1st thin laminated press

L6‧‧‧ length

31‧‧‧ core

A1‧‧‧Central Area

L‧‧‧Long direction

W‧‧‧ wide direction

Claims (6)

An absorbent article comprising: a liquid permeable surface sheet, a liquid impermeable back sheet, and an absorbent article disposed between the surface sheet and the inner sheet, wherein the absorbent article has a longitudinal direction and a width direction orthogonal to the longitudinal direction, the absorber having a central region including a center of the drain opening abutment region; and a peripheral region disposed adjacent to the central region around the central region In the absorber, a thin layer region having a thickness smaller than the peripheral region is provided around the peripheral region, and surrounds the periphery of the surrounding region, and the absorber in the central region and the peripheral region is larger than the aforementioned The absorber in the thin layer region is further expanded toward the inner sheet side, and the density of the absorber in the peripheral region is lower than the density of the absorber in the central region, and the central region is provided to press the absorption in the thickness direction. The central press section of the body, the thickness of the absorbent body in the central region is larger than the aforementioned surrounding area The thickness of the absorbent body is thinner. The absorbent article according to claim 1, wherein the central press portion is provided in plural in the central region. The absorbent article according to claim 1 or 2, wherein the length of the central press portion in the width direction is longer than the aforementioned The length of the central press section in the longitudinal direction is longer. The absorbent article according to claim 1 or 2, wherein the outer peripheral edge of the peripheral region is provided with a peripheral press portion for pressing the surface sheet and the absorbent body in the thickness direction. The absorbent article according to the first or second aspect of the invention, wherein the central region and the peripheral region are elliptical shapes extending in the longitudinal direction, and the center of the central region in the longitudinal direction The length of the above-mentioned wide direction of the region is the center width of the central region, and the center of the central region is the width of the central region of the peripheral region in the center of the longitudinal direction of the central region as the center of the surrounding region. The width is wider than the center of the aforementioned surrounding area. An absorbent article comprising: a liquid-permeable surface sheet, a liquid-impermeable back sheet, and an absorbent article disposed between the surface sheet and the inner sheet, wherein the absorbent article has a longitudinal direction and a width direction orthogonal to the longitudinal direction, wherein the absorber has a central region including a center of the drain opening abutting region, and a peripheral region disposed adjacent to the central region around the central region; And a thin layer region having a thickness smaller than the peripheral region, disposed around the peripheral region, and surrounding the periphery of the surrounding region, the absorber of the central region and the surrounding region is higher than The absorbent body in the thin layer region is further expanded toward the inner sheet side, and the density of the absorbent body in the peripheral region is lower than the density of the absorbent body in the central portion, and the central portion is provided to press the thickness direction in the central portion. In the center press portion of the absorber, an outer press portion for pressing the surface sheet and the absorber in a thickness direction is formed on an outer edge of the peripheral region, and a thin laminate press for pressing the absorber in a thickness direction is formed in the thin layer region. The length of the central press portion in the width direction is longer than the length of the central press portion in the longitudinal direction, and the thin laminated portion of the thin layer region is disposed on the outer side with respect to the peripheral region. The length of the thin laminate section in the width direction is longer than the length of the thin laminate section in the longitudinal direction, and the central region and the peripheral region are elliptical shapes extending toward the longitudinal direction, and the central region The length of the aforementioned central region in the center in the longitudinal direction as the central region When the width of the heart is wide and the length of the aforementioned wide area in the center of the longitudinal direction of the central region is the center width of the surrounding area, the center width of the central area is longer than the center of the surrounding area. The thickness of the absorber in the central region is thinner than the thickness of the absorber in the peripheral region.