JP2021041041A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of obtaining high deodorant effect.SOLUTION: In an absorbent article, an absorber composed of a front area, an intermediate area and a rear area aligned side by side along a longitudinal direction is arranged between a surface sheet and a rear surface sheet. The absorbent article comprises: first and second body groove parts composed of a high compression part and a low compression part in which the absorber is compressed integrally with the surface sheet, and having a shape symmetrical in a width direction; and a deodorant sheet positioned between the absorber and the rear surface sheet, and facing a whole area occupied by the high compression part in the first and second body groove parts, in a thickness direction. The first and second body groove parts include: first and second round formation parts integrally constituting a round outer shape, and having both end parts in the longitudinal direction, positioned in a central part in the width direction of the front area and the rear area; and first and second extension parts having one of both end parts of the first and second round formation parts as a starting point, and extending to a free end part positioned outside of the longitudinal direction and the width direction from the starting point.SELECTED DRAWING: Figure 3

Description

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

In sanitary napkins, an unpleasant odor may be released to the outside from an absorber that has absorbed menstrual blood during wearing, replacement, or disposal. On the other hand, Patent Documents 1 to 4 disclose sanitary napkins capable of suppressing the release of odor from the absorber. These sanitary napkins are provided with a deodorant sheet containing a deodorant on the outside of the absorber.

Japanese Unexamined Patent Publication No. 2016-12192 Japanese Unexamined Patent Publication No. 2002-272769 Japanese Unexamined Patent Publication No. 2008-048775 Japanese Patent No. 66328165

However, in sanitary napkins, menstrual blood tends to be concentrated and absorbed in the central region of the absorber facing the excretory part. For this reason, in sanitary napkins, the amount of deodorant contained in the deodorant sheet is insufficient with respect to the amount of menstrual blood in the central region of the absorber, so that a sufficient deodorizing effect can be obtained by the deodorant sheet. It may not be possible.

An object of the present invention relates to an absorbent article capable of obtaining a high deodorizing effect.

In the absorbent article according to one embodiment of the present invention, an absorber composed of a front region, an intermediate region, and a rear region arranged along the longitudinal direction is arranged between the front surface sheet and the back surface sheet.
The absorbent article is composed of a high-pressure squeezed portion and a low-pressure squeezed portion in which the absorber is squeezed integrally with the surface sheet, and has a first main body groove portion and a second main body groove portion having a symmetrical shape in the width direction, and the above-mentioned A deodorant sheet located between the absorber and the back surface sheet and facing the entire region occupied by the high-pressure squeezed portion in the first main body groove portion and the second main body groove portion in the thickness direction is provided.
The first main body groove portion and the second main body groove portion integrally form a round outer shape, and both ends in the longitudinal direction are located in the central portion in the width direction of the front region and the rear region. Freedom to be located outside the longitudinal direction and the width direction from the starting point, starting from one of the forming portion and the second round forming portion and the both ends of the first round forming portion and the second round forming portion. It has a first extension and a second extension that extend to the end.

According to the absorbent article of the present invention, a high deodorizing effect can be obtained.

It is a top view of the sanitary napkin which concerns on one Embodiment of this invention. It is sectional drawing along the line II-II of FIG. 1 of the said sanitary napkin. It is a top view of the absorber of the said sanitary napkin. It is a top view of the deodorant sheet of the above sanitary napkin. It is an exploded cross-sectional view along the VV line of FIG. 4 of the deodorant sheet.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each drawing shows an X-axis, a Y-axis, and a Z-axis that are orthogonal to each other. The X-axis, Y-axis, and Z-axis are common to all drawings.

[Overall configuration of sanitary napkin 1]
As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the embodiment of the present invention includes a main body portion M and a pair of wing portions W. In the sanitary napkin 1, the X-axis direction is the longitudinal direction, the Y-axis direction is the width direction, and the Z-axis direction is the thickness direction. In the sanitary napkin 1, the longitudinal direction corresponds to the front-back direction of the wearer, and the width direction corresponds to the left-right direction of the wearer.

The main body M extends along the longitudinal direction and has a rectangular contour. The wing portion W greatly protrudes outward in the width direction from the central portion in the longitudinal direction of the main body portion M. The sanitary napkin 1 is worn with the main body M sandwiched between the wearer's crotch and underwear. The wing portion W extends outward from the wearer's underwear and is folded back from the lower side in the thickness direction to the inward side in the width direction.

As shown in FIG. 2, the sanitary napkin 1 includes an absorber 10, a front surface sheet 20, a back surface sheet 30, a pair of side sheets 40, and a deodorant sheet 50. The sanitary napkin 1 has a laminated structure in which the absorbent body 10, the front surface sheet 20, the back surface sheet 30, and the deodorant sheet 50 are laminated in the thickness direction in the main body M.

The absorber 10 is arranged between the front surface sheet 20 and the back surface sheet 30. The absorber 10 has an absorbent core 11 and a core wrap sheet 12. The core wrap sheet 12 covers the absorbent core 11. The absorber 10 can take in a liquid substance such as menstrual blood into the absorbent core 11 via the core wrap sheet 12.

The absorbent core 11 is formed of a material having liquid absorbency, for example, a fiber aggregate composed of hydrophilic fibers such as pulp fibers, a composite material in which the fiber aggregate retains a super absorbent polymer P, or the like. To. The core wrap sheet 12 is made of a liquid-permeable material such as paper (tissue paper or the like) or non-woven fabric.

As shown in FIG. 3, the absorber 10 is composed of a front region Qf, an intermediate region Qm, and a rear region Qr that are arranged from the front to the rear along the longitudinal direction. The sanitary napkin 1 is configured such that the intermediate region Qm of the absorber 10 faces the excretory portion of the wearer. That is, the absorber 10 takes menstrual blood into the absorptive core 11 mainly in the intermediate region Qm.

The surface sheet 20 is arranged on the upper side of the absorber 10 in the thickness direction, and constitutes a contact surface with the wearer's skin. The surface sheet 20 is made of a material having liquid permeability, for example, a fiber having a core-sheath structure having polyethylene resin (PE) as a sheath and polypropylene resin (PP) or polyethylene terephthalate resin (PET) as a core. It is formed.

The back sheet 30 is arranged on the lower side of the absorber 10 in the thickness direction. The back sheet 30 is preferably impervious to liquid in order to prevent liquid leakage, and preferably has water vapor permeability so that moisture can be released. The back sheet 30 is formed of, for example, a thermoplastic resin film or a laminated sheet of a film and a non-woven fabric.

The pair of side sheets 40 are arranged outside the surface sheet 20 in the width direction. The side sheet 40 is preferably less hydrophilic than the surface sheet 20, and is formed of, for example, a film, a non-woven fabric, or a laminated sheet of a film and a non-woven fabric. The side sheet 40 is joined to the surface sheet 20 by, for example, an adhesive E.

The deodorant sheet 50 is arranged between the absorber 10 and the back surface sheet 30. The deodorant sheet 50 deodorizes the odor derived from menstrual blood absorbed by the absorber 10 inside the back surface sheet 30 in the thickness direction. As a result, in the sanitary napkin 1, the odor of menstrual blood absorbed by the absorber 10 is less likely to be released to the outside of the sanitary napkin 1. In particular, when a moisture-permeable material is used as the back sheet 30, the odor of menstrual blood is less likely to be released to the outside through the back sheet 30.

The laminated structure of the main body M of the sanitary napkin 1 may include a sheet other than the above. For example, in the sanitary napkin 1, by providing a second sheet (sublayer sheet) between the absorber 10 and the surface sheet 20, menstrual blood absorbed by the absorber 10 can be returned to the surface sheet 20 side. Can be prevented.

[Pressure groove 60]
The sanitary napkin 1 is provided with a squeeze groove portion 60. The squeezing groove portion 60 is configured as a groove-shaped squeezing mark recessed in the thickness direction by squeezing the absorber 10 together with the surface sheet 20 in the thickness direction. In FIG. 3, for convenience of explanation, the surface sheet 20 is omitted, and the squeezing groove portion 60 is shown only by the absorber 10.

The squeezing groove portion 60 is composed of a high pressure squeezing portion 60a and a low pressure squeezing portion 60b. The degree of squeezing differs between the high-pressure squeezing portion 60a and the low-pressure squeezing portion 60b. That is, the high-pressure squeezing portion 60a is squeezed more strongly in the thickness direction than the low-pressure squeezing portion 60b. As a result, the high-pressure squeezing portion 60a is thinner and denser than the low-pressure squeezing portion 60b.

The low-pressure squeezing portion 60b is a linear groove covering the entire range of the squeezing groove portion 60. The high-pressure squeezing portion 60a is a hole recessed in the low-pressure squeezing portion 60b. In the squeezing groove portion 60, a plurality of high-pressure squeezing portions 60a are intermittently arranged along the extending direction of the low-pressure squeezing portion 60b. More specifically, in the intermediate region Qm, only the circular high-pressure squeezing portion 60a is arranged, and in the front region Qf and the rear region Qr, the circular high-pressure squeezing portion 60a and the elliptical high-pressure squeezing portion 60a alternate. It is arranged in. In this embodiment, the high-pressure squeezing portion 60a that is in close contact with the free end portions 61d and 62d of the first and second extending portions 61b and 62b may have a circular shape or an elliptical shape. In the squeezing groove portion 60, the high-pressure squeezing portions 60a and the low-pressure squeezing portions 60b are alternately arranged along the center line in the groove width direction in any of the front region Qf, the intermediate region Qm, and the rear region Qr. The shape of each high-pressure squeezing portion 60a in the squeezing groove portion 60 is not limited to the above, and may be, for example, a polygonal shape.

Since the squeezed groove portion 60 is composed of squeezed fibers, menstrual blood can be induced along the extending direction by the action of the capillary phenomenon. Thereby, in the sanitary napkin 1, the diffusion behavior of menstrual blood absorbed mainly in the central portion in the width direction of the intermediate region Qm in the absorber 10 can be designed by arranging the squeezing groove portion 60. More specifically, in the squeezing groove portion 60, the diffusion of menstrual blood in the squeezing groove portion 60 is promoted by providing the high pressure squeezing portion 60a having a higher density than the low pressure squeezing portion 60b in the low pressure squeezing portion 60b at intervals. Further, in the squeezing groove portion 60, the diffusion rate of menstrual blood can be changed depending on the shape of each high-pressure squeezing portion 60a, the distance between adjacent high-pressure squeezing portions 60a, and the like. That is, in the squeezing groove portion 60, the low pressure squeezing portion 60b forms an overall diffusion path of menstrual blood in the absorber 10, and the action of the high pressure squeezing portion 60a changes the diffusion rate of menstrual blood for each region. it can. Therefore, in the absorber 10, the diffusion behavior of menstrual blood capable of suppressing liquid leakage can be designed by the configuration of the low-pressure squeezing portion 60b and the high-pressure squeezing portion 60a.

In order to obtain the above action more effectively, the groove width of the low pressure squeezed portion 60b is preferably 1 mm or more, more preferably 2 mm or more, and preferably 5 mm or less, more preferably 4 mm or less. The diameter of the high-pressure squeezed portion 60a is preferably 0.8 mm or more, more preferably 1 mm or more, and preferably 3 mm or less, more preferably 2 mm or less. The diameter of the high-pressure squeezing portion 60a when the high-pressure squeezing portion 60a is not circular is the size of the high-pressure squeezing portion 60a in the extending direction of the low-pressure squeezing portion 60b.

The squeezing groove portion 60 includes a first main body groove portion 61 and a second main body groove portion 62. FIG. 3 shows an axis C extending in the longitudinal direction and passing through the center of the absorber 10 in the width direction. In the squeezing groove portion 60, the first main body groove portion 61 and the second main body groove portion 62 are located on opposite sides of the shaft C, and have a shape that is line-symmetrical in the width direction with the shaft C as the axis of symmetry.

The first and second main body groove portions 61 and 62 include first and second round forming portions 61a and 62a, and first and second extension portions 61b and 62b. The round forming portions 61a and 62a are provided over the front region Qf, the intermediate region Qm, and the rear region Qr. The extending portions 61b and 62b are provided in the front region Qf and the rear region Qr, respectively.

The first and second round forming portions 61a and 62a have both end portions 61c and 62c in the longitudinal direction at the central portion in the width direction in the front region Qf and the rear region Qr. In the front region Qf and the rear region Qr, the low pressure squeezing portion 60b is in contact on the axis C at the end portion 61c and the end portion 62c, respectively, and the high pressure squeezing portion 60a is separated in the width direction. The first and second round forming portions 61a and 62a integrally form a round outer shape R by connecting the end portions 61c and 62c in the front region Qf and the rear region Qr.

In the first and second main body groove portions 61 and 62, the first and second extending portions 61b and 62b are continuously outward in the longitudinal direction from the end portions 61c and 62c of the first and second round forming portions 61a and 62a, respectively. Extends to. The first and second extension portions 61b and 62b have free end portions 61d and 62d which are opposite ends to the end portions 61c and 62c. The free ends 61d and 62d are located outside the ends 61c and 62c in the longitudinal direction and the width direction.

More specifically, in the anterior region Qf and the rear region Qr, the first and second extending portions 61b and 62b proceed outward in the longitudinal direction starting from the end portions 61c and 62c, respectively, and are directed outward in the width direction. It extends to the free ends 61d and 62d while drawing an arc. As a result, the first and second extension portions 61b and 62b integrally form a fountain-like outer shape.

In the absorber 10, menstrual blood absorbed in the intermediate region Qm is widely diffused in the longitudinal direction toward the anterior region Qf and the posterior region Qr by the action of the first and second round forming portions 61a and 62a. Thereby, in the sanitary napkin 1, it is possible to prevent menstrual blood from concentrating in the intermediate region Qm in the absorber 10. More specifically, in the absorber 10, when the menstrual blood absorbed mainly in the central portion in the width direction of the intermediate region Qm reaches the first and second round forming portions 61a and 62a by diffusion outward in the width direction, the first And diffusion along the second round forming portions 61a, 62a becomes predominant. That is, in the absorber 10, the menstrual blood diffusion direction is directed forward and backward along the first and second round forming portions 61a and 62a.

The first and second round forming portions 61a and 62a are provided with first bulging portions 61e and 62e and second bulging portions 61f and 62f having a shape that bulges outward in the width direction. In the first and second round forming portions 61a and 62a, the first bulging portions 61e and 62e are provided over the entire range of the intermediate region Qm, and the second bulging portions 61f and 62f are provided in the front region Qf and the rear region Qr, respectively. It is provided.

In the first and second round forming portions 61a and 62a, the second bulging portions 61f and 62f are connected to the front and rear in the longitudinal direction of the first bulging portion 61e. As a result, the outer shapes R of the first and second round forming portions 61a and 62a are formed in the width direction at the boundary portion Bf between the intermediate region Qm and the front region Qf and the boundary portion Br between the intermediate region Qm and the rear region Qr. It has a constricted shape. That is, the first bulging portions 61e and 62e are connected to the boundary portions Bf and Br diagonally inward from the inside in the longitudinal direction. On the other hand, the second bulging portions 61f and 62f extend obliquely outward in the longitudinal direction from the boundary portions Bf and Br. Therefore, the menstrual blood diffusion paths along the first and second round forming portions 61a and 62a are largely bent outward in the width direction at the boundary portions Bf and Br.

Therefore, a part of menstrual blood that enters the anterior region Qf and the posterior region Qr diagonally inward from the boundary portions Bf and Br diffuses into the region inside the second bulging portions 61f and 62f in the width direction according to the inertia. It is easy to do. That is, in the absorber 10, the amount of menstrual blood diffused outward in the longitudinal direction in the anterior region Qf and the posterior region Qr is suppressed while keeping the menstrual blood inside the first and second round forming portions 61a and 62a. Can be done. As a result, in the sanitary napkin 1, it is possible to suppress liquid leakage in the absorber 10 to the outside in the longitudinal direction and the width direction.

Further, in the first and second round forming portions 61a and 62a, the second bulging portions 61f and 62f of the front region Qf and the rear region Qr have the highest curvature as compared with the first bulging portions 61e and 62e of the intermediate region Qm. The curvature (maximum curvature) of the part where is large is large. That is, the second bulging portions 61f and 62f have a shape that is steeper than the first bulging portions 61e and 62e. As a result, the bending of the first and second round forming portions 61a and 62a at the boundary portions Bf and Br becomes large, so that menstrual blood is more likely to stay inward than the first and second round forming portions 61a and 62a. Further, in the sanitary napkin 1, since the diffusion rate of menstrual blood in the second bulging portions 61f and 62f of the anterior region Qf and the posterior region Qr is suppressed, liquid leakage can be further suppressed.

Further, the first and second round forming portions 61a and 62a preferably have a maximum width portion separated in the width direction in the intermediate region Qm in order to widely diffuse menstrual blood. The dimensions of the maximum width portions of the first and second round forming portions 61a and 62a are preferably 40 mm or more, more preferably 42 mm or more, and preferably 60 mm or less, more preferably 55 mm or less.

The first and second main body grooves 61 and 62 spread menstrual blood diffused to the ends 61c and 62c of the first and second round forming portions 61a and 62a along the first and second extending portions 61b and 62b. Further diffuse. That is, the menstrual blood that has reached the ends 61c and 62c of the first and second round forming portions 61a and 62a spreads toward the free ends 61d and 62d along the first and second extending portions 61b and 62b. To do.

Since the first and second extending portions 61b and 62b extend outward from the central portion in the width direction, the amount of menstrual blood diffused outward in the longitudinal direction in the anterior region Qf and the posterior region Qr of the absorber 10 is suppressed. .. As a result, in the sanitary napkin 1, menstrual blood that has reached the anterior region Qf and the posterior region Qr is less likely to leak to the outside in the longitudinal direction of the absorber 10.

Further, as described above, the first and second extending portions 61b and 62b form an arc outward in the width direction. Therefore, the menstrual blood that has entered the extending portions 61b, 62b outward in the longitudinal direction from the ends 61c, 62c of the first and second round forming portions 61a, 62a is along the arc-shaped extending portions 61b, 62b. In the process of diffusion, the diffusion direction is gradually changed outward in the width direction.

As a result, in the first and second extending portions 61b and 62b, the diffusion direction of menstrual blood can be surely directed to the outside in the width direction while suppressing the diffusion rate of menstrual blood. As a result, in the sanitary napkin 1, menstrual blood that has diffused to the first and second extension portions 61b and 62b tends to stay in the vicinity of the first and second extension portions 61b and 62b, so that liquid leakage is further suppressed. can do.

Further, in the first and second extending portions 61b and 62b, as shown in FIG. 3, it is preferable that the free end portions 61d and 62d face the intermediate region Qm side. As a result, in the sanitary napkin 1, menstrual blood that has reached the free ends 61d and 62d of the first and second extending portions 61b and 62b is returned to the inside of the free ends 61d and 62d, so that it is outside in the longitudinal direction. It is possible to effectively suppress liquid leakage to.

In the first and second extending portions 61b and 62b, the distance in the width direction between the free end portions 61d and 62d is preferably 15 mm or more in order to spread menstrual blood more uniformly in the anterior region Qf and the posterior region Qr. , More preferably 20 mm or more, and preferably 35 mm or less, more preferably 30 mm or less.

The squeezing groove portion 60 further includes an inner groove portion 63 in addition to the first and second main body groove portions 61 and 62. As shown in FIG. 3, the inner groove portion 63 is provided in the front region Qf and the rear region Qr, respectively. The inner groove portion 63 has a curved shape that extends in the width direction in the region between the second bulging portions 61f and 62f in the first and second main body grooves 61 and 62 and projects outward in the longitudinal direction.

The inner groove portion 63 can take in menstrual blood that diffuses inward from the second bulging portions 61f and 62f from the boundary portions Bf and Br and diffuse it toward the center in the width direction. That is, the inner groove portion 63 has an action of preventing the diffusion of menstrual blood outward in the longitudinal direction. As a result, the sanitary napkin 1 can further suppress liquid leakage to the outside in the longitudinal direction.

The outer shape R composed of the first and second round forming portions 61a and 62a of the first and second main body groove portions 61 and 62 may be recognized as a round shape as a whole, and is partially interrupted. May be good. For example, in the first and second round forming portions 61a and 62a, the end portions 61c and 62c may be separated in the width direction, and a gap may be formed at the boundary portions Bf and Br.

Further, in the first and second round forming portions 61a and 62a of the first and second main body groove portions 61 and 62, the end portions 61c and 62c may overlap at least one of the front region Qf and the rear region Qr. In this case, in the first and second main body groove portions 61 and 62, the first and second extension portions 61b and 62b start from a common position where the end portions 61c and 62c overlap, and the free end portions 61d and 62d, respectively. Extends to.

Further, the first and second round forming portions 61a and 62a of the first and second main body groove portions 61 and 62 do not have to have a shape that is strictly symmetrical in the width direction. That is, if the first and second round forming portions 61a and 62a have a shape having symmetry to the extent that there is no clear difference in the diffusion behavior of menstrual blood in the regions on both sides of the absorber 10 across the axis C. Good.

In addition, in the first and second main body groove portions 61 and 62, the first and second extension portions 61b and 62b may be omitted in one of the front region Qf and the rear region Qr for convenience of design. Also in this case, in the first and second main body groove portions 61 and 62, the same effect as described above can be obtained in one of the front region Qf and the rear region Qr provided with the first and second extension portions 61b and 62b. Be done.

Further, in the first and second round forming portions 61a and 62a of the first and second main body groove portions 61 and 62, the second bulging portions 61f and 62f may be omitted in at least one of the front region Qf and the rear region Qr. Good. That is, the round outer shape R composed of the first and second round forming portions 61a and 62a does not have to be confined at at least one of the boundary portions Bf and Br.

Further, in the squeezing groove portion 60, a plurality of inner groove portions 63 may be provided in at least one of the front region Qf and the rear region Qr, or the inner groove portion 63 may be omitted, if necessary. Further, in the sanitary napkin 1, the squeezing groove portion 60 may include a groove portion other than the first and second main body grooves 61 and 62 and the inner groove 63, if necessary.

[Deodorant sheet 50]
As shown in FIG. 4, the deodorizing sheet 50 includes a deodorizing region 50a and a margin region 50b. The deodorant sheet 50 is provided with margin regions 50b on both sides in the width direction of the deodorant region 50a that constitutes most of the deodorant sheet 50. The deodorant region 50a and the margin region 50b extend over the entire longitudinal direction of the deodorant sheet 50.

As shown in FIG. 5, the deodorant sheet 50 includes a deodorant-containing sheet 51 and two covering sheets 52 that cover the deodorant-containing sheet 51 from above and below in the thickness direction. The deodorant-containing sheet 51 contains a deodorant throughout and exhibits a deodorizing function. On the other hand, the coating sheet 52 does not contain a deodorant.

The deodorant-containing sheet 51 is arranged in the deodorant region 50a and is closed by the covering sheet 52 in the margin region 50b. As a result, in the deodorant sheet 50, it is possible to prevent the deodorant contained in the deodorant-containing sheet 51 from detaching outward in the width direction. As a result, it is possible to suppress the adhesion of the deodorant to the clothes and the contamination of the production line by the deodorant.

The deodorant sheet 50 can deodorize the odor of menstrual blood absorbed by the absorber 10 by the action of the deodorant contained in the deodorant-containing sheet 51. In particular, in the absorber 10, menstrual blood is widely diffused without being locally concentrated by the action of the first and second main body grooves 61 and 62, so that the deodorizing effect of the deodorizing sheet 50 can be satisfactorily obtained. ..

In FIG. 3, the position of the deodorant sheet 50 is indicated by a broken line. The deodorant sheet 50 faces at least the entire area occupied by the high-pressure squeezing portion 60a in the squeezing groove portion 60 in the thickness direction. As a result, in the sanitary napkin 1, the diffusion of menstrual blood is promoted, and the high-pressure squeezed portion 60a in which the odor is easily released can be effectively deodorized.

Further, it is preferable that the deodorant sheet 50 faces the entire region including the region occupied by the low pressure squeezing portion 60b in the squeezing groove portion 60 in the thickness direction. Further, in the deodorizing sheet 50, it is more preferable that the deodorizing region 50a faces the entire region of the squeezing groove portion 60. As a result, in the sanitary napkin 1, the deodorizing effect of the deodorizing sheet 50 can be obtained even better.

Further, in the deodorant sheet 50, it is preferable that the deodorant region 50a is colored. As a result, in the sanitary napkin 1, menstrual blood absorbed by the absorber 10 is blocked by the colored deodorant region 50a, making it difficult to see from the back sheet 30 side. In the deodorant sheet 50, a colored deodorant region 50a can be realized by using a colored deodorant.

The deodorant used for the deodorant sheet 50 is not limited to a specific deodorant as long as it is colored, but a black deodorant such as activated carbon is used from the viewpoint of effectively reducing the visibility of the red color of menstrual blood. Is preferably used. In this specification, colored is a visual concept excluding colorless and transparent and white, and a lightness L ^{* of} 85 or more is defined as white.

As described above, in the sanitary napkin 1, the action of the deodorant sheet 50 suppresses the release of the odor to the outside of the menstrual blood absorbed by the absorber 10 and reduces the visibility from the outside. it can. Thereby, the sanitary napkin 1 can alleviate the olfactory and visual discomfort at the time of replacement or disposal.

The deodorizing sheet 50 may be a functional sheet having a deodorizing function, and may have a configuration different from the above, if necessary. For example, the deodorant sheet 50 may be composed of only the deodorant region 50a. Further, the deodorant sheet 50 may be a functional sheet having other functions such as an antibacterial function in addition to the deodorant function.

[Independent squeezing section 70]
The sanitary napkin 1 is provided with an independent pressing portion 70. The independent squeezing portion 70 is composed of a squeezing portion in which the absorber 10 is squeezed integrally with the surface sheet 20. The squeezing portion constituting the independent squeezing portion 70 may include, for example, squeezing portions having different degrees of squeezing, or may be only squeezing portions having a constant degree of squeezing. The degree of squeezing in the squeezing section constituting the independent squeezing section 70 may be the same as or different from at least one of the high-pressure squeezing section 60a and the low-pressure squeezing section 60b of the squeezing groove section 60.

As shown in FIG. 3, the independent pressing portion 70 is provided around the first and second extending portions 61b, 62b of the first and second main body groove portions 61, 62 in the front region Qf and the rear region Qr. The independent pressing portion 70 has a configuration independent of the pressing groove portion 60, that is, is provided apart from the extending portions 61b and 62b of the first and second main body groove portions 61 and 62.

In the sanitary napkin 1, the first and second main body grooves 61 and 62 enter the first and second extension portions 61b and 62b from the ends 61c and 62c of the first and second round forming portions 61a and 62a. The menstrual blood that diffuses around the first and second extension portions 61b and 62b is taken into the independent pressing portion 70 by the action of the capillary phenomenon. As a result, the sanitary napkin 1 can further suppress liquid leakage.

In the sanitary napkin 1, it is preferable to adjust the distance between the independent pressing portion 70 and the first and second extending portions 61b and 62b so that the above effects can be obtained more effectively. The distance between the independent pressing portion 70 and the extending portions 61b and 62b is preferably 7 mm or more, more preferably 10 mm or more, and preferably 25 mm or less, more preferably 20 mm or less.

It is preferable that at least a part of the independent pressing portion 70 does not face the deodorizing sheet 50 in the thickness direction. As a result, a small amount of menstrual blood taken into the independent pressing unit 70 releases the odor without being deodorized by the deodorizing sheet 50. Therefore, the sanitary napkin 1 can notify the wearer of the replacement time by the odor before the liquid leaks to the outside in the longitudinal direction.

As shown in FIG. 3, it is preferable that a part of the independent pressing portion 70 faces the deodorizing sheet 50 in the thickness direction. That is, it is preferable that the independent pressing portion 70 is arranged so as to straddle the edge portion of the deodorizing sheet 50. As a result, in the sanitary napkin 1, there is no gap between the deodorant sheet 50 and the independent pressing portion 70, which is the starting point of deformation in the thickness direction.

The independent squeezing portion 70 can have various planar shapes, and may be composed of a single squeezing portion or a combination of a plurality of squeezing portions. The independent pressing portion 70 can be composed of one or more types of pressing portions selected from, for example, a drop shape, a circular shape, an elliptical shape, a polygonal shape, a curved shape, a linear shape, and other shapes.

In the example shown in FIG. 3, the independent squeezing portion 70 of the front region Qf is configured as a pattern that can be visually recognized as one design by combining the four drop-shaped squeezing portions and the two dot-shaped squeezing portions. Has been done. Further, the independent pressing portion 70 of the rear region Qr is configured as a floral pattern in which four drop-shaped pressing portions are combined.

Further, the position of the independent pressing portion 70 can be changed in various ways from various viewpoints such as the diffusion behavior of menstrual blood required for the absorber 10. Further, a plurality of independent pressing units 70 may be provided. Further, in the sanitary napkin 1, the independent pressing portion 70 may be omitted from the viewpoint of required performance and manufacturing cost.

[Absorbent core 11]
As shown in FIG. 3, the absorbent core 11 constituting the absorber 10 has a base portion 111, a protruding portion 112, and a high-density portion 113. The base portion 111 extends over the anterior region Qf, the intermediate region Qm, and the posterior region Qr of the absorbent core 11. The protruding portion 112 and the high-density portion 113 are provided at the central portions of the base portion 111 in the longitudinal direction and the width direction.

The protruding portion 112 is provided at a portion facing the excretion portion facing the wearer's excretion portion, which is located at the central portion in the width direction of the intermediate region Qm. As shown in FIG. 2, the projecting portion 112 projects upward from the base portion 111 in the thickness direction. The protruding portion 112 has a density equivalent to that of the base portion 111, that is, has a higher basis weight than the base portion 111.

The high-density portion 113 is provided on both sides of the protruding portion 112 in the width direction. As shown in FIG. 2, the high-density portion 113 is formed to have the same thickness as the base portion 111, and forms a series of flat portions together with the base portion 111. The high density portion 113 has a higher basis weight than the protruding portion 112, that is, has a higher density than the base portion 111 and the protruding portion 112.

The basis weight of the base portion 111 is preferably 90 g / m ² or more, more preferably 100 g / m ² or more, and preferably 350 g / m ² or less, more preferably 300 g / m ² or less. The basis weight of the protruding portion 112 and the high-density portion 113 is preferably 250 g / m ² or more, more preferably 300 g / m ² or more, and preferably 700 g / m ² or less, more preferably 650 g / m ^2. It is as follows.

With such a configuration, in the absorber 10, menstrual blood absorbed by the protruding portion 112 provided on the opposite portion of the excretory portion in the absorbent core 11 is provided on the outer side in the width direction by the action of the capillary phenomenon. It is guided to the density part 113. As a result, in the absorber 10, the menstrual blood absorbed by the protruding portion 112 is diffused in the front-rear direction by the high-density portion 113, so that it is possible to prevent the menstrual blood from being excessively concentrated on the protruding portion 112.

In the sanitary napkin 1, it is preferable that at least the high-density portion 113 of the absorbent core 11 faces the deodorant sheet 50 in the thickness direction. As a result, in the sanitary napkin 1, the diffusion of menstrual blood is promoted, the odor is easily released, and the high-density portion 113 of the absorbent core 11 can be effectively deodorized.

Further, the protruding portion 112 of the absorbent core 11 has a lower density than the high-density portion 113, and contains many voids capable of taking in menstrual blood. Further, in the protruding portion 112 and the high-density portion 113, more menstrual blood can be taken in because of the high basis weight. Therefore, in the absorber 10, a large amount of menstrual blood can be rapidly absorbed in the protruding portion 112 and the high-density portion 113, so that liquid leakage is unlikely to occur.

The absorbent core 11 may not be provided with the protruding portion 112 if the absorbability of menstrual blood at the portion facing the excretory portion can be ensured. That is, in the absorbent core 11, the basis weight and density of the excretion portion facing portion can be made equivalent to that of the base portion 111. In this case, the absorbent core 11 has a flat shape having a uniform thickness as a whole.

Further, the absorbent core 11 may not be provided with the high-density portion 113. In this case, in the sanitary napkin 1, for example, instead of the high-density portion 113 of the absorbent core 11, the squeezing groove portion 60 for guiding the menstrual blood absorbed by the excretory portion facing portion of the absorbent core 11 to the periphery thereof. Other configurations such as can be provided.

[Other Embodiments]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

For example, the sanitary napkin 1 according to the present invention can be modified in the above configuration within the range in which the above effects can be obtained. As an example, the sanitary napkin 1 may not be provided with the wing portion W. In addition, the sanitary napkin 1 may be provided with a rear flap portion that extends widely along the wearer's buttocks.

Furthermore, the absorbent articles according to the present invention are not limited to the sanitary napkins described in the above embodiments. The present invention is also widely applicable to absorbent articles that absorb liquids other than menstrual blood. Examples of the absorbent article to which the present invention can be applied include, for example, a urine collecting pad, a vaginal discharge sheet, and a disposable diaper, in addition to the sanitary napkin.

1 ... Sanitary napkin 10 ... Absorbent 11 ... Absorbent core 111 ... Base 112 ... Protruding 113 ... High density 20 ... Front sheet 30 ... Back sheet 50 ... Deodorant sheet 50a ... Deodorant area 50b ... Margin area 60 ... Squeezing groove portions 61, 62 ... Main body groove portions 61a, 62a ... Round forming portions 61b, 62b ... Extension portions 61c, 62c ... End portions 61d, 62d ... Free end portions 61e, 62e, 61f, 62f ... Squeezing part

Claims (9)

An absorbent article in which an absorber composed of a front region, an intermediate region, and a rear region arranged along the longitudinal direction is arranged between a front surface sheet and a back surface sheet.
The absorber is composed of a high-pressure squeezed portion and a low-pressure squeezed portion that are squeezed integrally with the front surface sheet, and has a first main body groove portion and a second main body groove portion that have symmetrical shapes in the width direction, and the absorber and the back surface sheet. A deodorant sheet located between the first main body groove portion and the second main body groove portion and facing the entire area occupied by the high-pressure squeezing portion in the thickness direction is provided.
The first main body groove and the second main body groove are
A first round forming portion and a second round forming portion, which integrally form a round outer shape and whose both ends in the longitudinal direction are located in the central portion in the width direction of the front region and the rear region.
The first extending portion and the first extending portion extending from one of the both ends of the first round forming portion and the second round forming portion to the free ends located outside the longitudinal direction and the width direction from the starting point. An absorbent article having a second extension. The absorbent article according to claim 1, wherein the first extension portion and the free end portion of the second extension portion face the intermediate region side. The absorbent article according to claim 1 or 2, wherein the first extending portion and the second extending portion are provided in the front region and the rear region, respectively. The absorber is composed of a squeezed portion that is squeezed integrally with the surface sheet, is located around the first extension portion and the second extension portion, and at least a part thereof is in the thickness direction with the deodorant sheet. The absorbent article according to any one of claims 1 to 3, further comprising an independent pressing portion that does not face each other. The absorbent article according to claim 4, wherein a part of the independent pressing portion faces the deodorant sheet in the thickness direction. Each of the first main body groove portion and the second main body groove portion includes a first bulging portion and a second bulging portion having a shape of bulging outward in the width direction.
The first bulging portion is provided in the intermediate region and is provided.
From claim 1, the second bulging portion is provided adjacent to the first bulging portion in at least one of the front region and the rear region, and has a maximum curvature larger than that of the first bulging portion. The absorbent article according to any one of 5. The absorbent article according to any one of claims 1 to 6, wherein the deodorant sheet includes a deodorant region in which a colored deodorant is arranged. The absorbent article according to claim 7, wherein the deodorant sheet is located on both sides of the deodorant region in the width direction and further includes a margin region in which the deodorant is not arranged. The absorber is provided on both sides of the base portion, the excretion portion facing portion provided at the center of the base portion in the longitudinal direction and the width direction, and the excretion portion facing portion in the width direction, and the base. The absorbent article according to any one of claims 1 to 8, which has an absorbent core including a portion and a high-density portion having a density higher than that of the excretory portion facing portion.

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