JP2019187645A - Absorbent article - Google Patents

Abstract

To suppress a top sheet from floating from an absorber in an absorbent article which includes the absorber having a high basis weight part and a low basis weight part, and the top sheet, and has a compression part.SOLUTION: An absorbent article 1 includes an absorber 4 having a high basis weight part HB and a low basis weight part LB, and a top sheet 2, and has compression parts 5-8. The compression part has a high basis weight compression part of the high basis weight part, and a low basis weight compression part of the low basis weight part. The high basis weight compression part includes a first high compression part 21b and a first low compression part 22b, and the low basis weight compression part includes a second high compression part 21a and a second low compression part 22a. A difference ΔHa between a height Ha1 of a bottom 21aBT of the second high compression part, and a height Ha2 of a bottom 22aBT of the second low compression part is smaller than a difference ΔHb between a height Hb1 of a bottom 21bBT of the first high compression part, and a height Hb2 of a bottom 22bBT of the first low compression part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent article.

  Absorbent articles comprising an absorbent body having a high basis weight part, which is a part having a high basis weight, and a low basis weight part, which is a part having a low basis weight, a top sheet, and a back sheet are known. For example, Patent Literature 1 discloses an absorbent article including an absorbent core having a high basis weight part and a low basis weight part, and a surface sheet. The high basic weight part and the low basic weight part of the absorbent body are alternately formed in the longitudinal direction and the width direction of the absorbent article. In the absorbent article, a groove is formed by recessing the top sheet and the absorbent core integrally. According to Patent Document 1, when the absorbent article is used, the low basis weight portion of the absorbent body becomes a folding point, the absorbent body (absorbent article) bends according to the movement of the wearer, and the absorbent article is attached to the wearer's body. It can be fitted to. The groove, the high basis weight portion, and the low basis weight portion are supposed to exert an absorption / diffusion action of excretory fluid. In addition, since the absorbent core is easily induced to be deformed into a shape that protrudes toward the wearer's skin with the low basis weight portion as a basic axis, the area opposite to the excretory opening of the absorbent core is It can be easily deformed into a shape that can be pressed against. And the fitting property of an absorbent article improves, and while providing a wearer with a comfortable mounting feeling, the leak of menstrual blood is suppressed effectively.

JP 2013-9946 A

  In patent document 1, the thickness of a low basic weight part is formed thinner than the thickness of a high basic weight part. And the position corresponding to the high basis weight part (position where the high basis weight part and the surface sheet overlap in the thickness direction) and the position corresponding to the low basis weight part in the structure in which the top sheet and the absorber are laminated. A groove, that is, a squeezed portion is formed at a position where the low basis weight portion and the surface sheet overlap in the thickness direction. In the compressed portion, a portion that is relatively deeply depressed, that is, a high-pressure portion, and a portion that is relatively shallowly recessed, that is, a low-pressure portion, are formed adjacent to each other in the thickness direction.

  However, according to the inventor's study, when the high pressing portion and the low pressing portion are formed adjacent to each other at the position corresponding to the high basis weight portion and the position corresponding to the low basis weight portion, It has been found that problems can occur.

  Usually, in the roll for embossing used for the manufacture of absorbent articles, the convex part on the outer peripheral surface of the roll used for the formation of the pressing part is the pressing part for pressing the high basis weight part and the low basis weight part. It is the same as the part to be performed, and is not particularly different. Therefore, in the manufactured absorbent article, the height (or thickness, hereinafter, simply referred to as “the height of the bottom portion”) from the back sheet of the bottom portion of the pressing portion at a position corresponding to the high basis weight portion is low. The difference between the height of the bottom portion of the pressing portion and the difference between the height of the bottom portion of the high-pressure pressing portion and the height of the bottom portion of the low-pressure pressing portion at the position corresponding to the low basis weight portion are substantially the same. That is, in the position corresponding to the low basis weight part and the position corresponding to the high basis weight part, the distance between the bottom part of the high pressing part and the bottom part of the low pressing part is substantially the same. Here, in the low basis weight part in which bending deformation is likely to occur, bending is likely to occur between the bottom part of the high-pressure squeezing part and the bottom part of the low-pressure squeezing part during bending deformation when the absorbent article is used. That is, it becomes easy to locate the bent line of bending deformation between the bottom part of a high pressing part and the bottom part of a low pressing part. In that case, in the low basis weight part, force in a direction away from each other is easily generated between the bottom part of the high pressing part and the bottom part of the low pressing part at every bending deformation at the position of the broken line. Therefore, if the distance at the low basis weight part is almost the same as the distance at the high basis weight part, there is no problem because the high basis weight part hardly bends and deforms. Since bending deformation is likely to occur, the force in the separating direction is too large, and the bonding between the topsheet and the absorber may be easily peeled off by the force. And when bending deformation is repeated at the time of use of an absorbent article, in a low basic weight part, in the bottom part of a high pressing part or the bottom part of a low pressing part, a surface sheet floats from an absorber by the power of the direction which leaves There is a risk of breaking. If it becomes so, in a low basic weight part, there exists a possibility that it may become difficult for a high pressing part and a low pressing part to show effects, such as damming of a waste liquid, spreading | diffusion, absorption.

  An object of the present invention is to absorb an absorbent article having an absorbent body having a high basis weight part and a low basis weight part, and a topsheet, and having a squeezed part that is recessed from the topsheet side toward the absorbent body. It is in providing the absorbent article which can suppress that a surface sheet floats from an absorber or breaks at the time of use of an absorbent article.

  The absorbent article of the present invention is as follows. (1) An absorber having a high basis weight part and a low basis weight part, a top sheet laminated on the absorber, and a back sheet located on the opposite side of the top sheet of the absorber, It is an absorptive article which has a pressing part which became depressed toward the absorber side from the surface sheet side, and the pressing part is the high basic weight pressing part formed in the position corresponding to the high basic weight part, and A low basis weight pressing portion formed at a position corresponding to the low basis weight portion, the high basis weight pressing portion adjacent to the first high pressure pressing portion and the first high pressure pressing portion, and the first. A first low-pressure squeezing part that is recessed more shallowly than the high-pressure squeezing part, wherein the low basis weight squeezing part is adjacent to the second high-pressure squeezing part and the second high-pressure squeezing part, and from the second high-pressure squeezing part. A second depression of the second high-pressure portion, and a bottom portion of the second high-pressure portion and a bottom portion of the second low-pressure portion. The difference from the height from the back sheet is smaller than the difference between the height from the back sheet at the bottom of the first high-pressure portion and the height from the back sheet at the bottom of the first low-pressure portion. Goods.

  The present absorbent article has the above configuration. Therefore, in the low basis weight part, the distance between the bottom part of the second high-pressure part and the bottom part of the second low-pressure part is relatively small. Therefore, it can be made difficult to bend in the area | region between the bottom part of a 2nd high pressing part, and the bottom part of a 2nd low pressing part. That is, the bent line of the bending deformation can be made difficult to be located in the region between the bottoms, and the position where the bending occurs can be shifted to another region. In addition, even if the broken line is located in the region between the two bottoms, the distance between the two bottoms is relatively small, so that the low basis weight portion LB is formed between the two bottoms when bent. The forces in the directions away from each other can be reduced. Therefore, even when bending deformation is repeated during use of the absorbent article, in the low basis weight portion, the bottom sheet is restrained from floating or breaking from the absorbent body due to the force in the direction of the separation. it can. Accordingly, the second high-pressure squeezed part and the second low-pressure squeezed part can easily exert actions such as damming, diffusing and absorbing excretory liquid. Thus, in an absorbent article which has an absorber which has a high basic weight part and a low basic weight part, and a surface sheet, and has a pressing part dented toward the absorber side from the surface sheet side, an absorbent article During use, it becomes possible to prevent the topsheet from floating or breaking from the absorber.

In the absorbent article of the present invention, (2) the absorbent body includes a first recess formed by recessing a non-skin side surface toward the skin side on the non-skin side of the high basis weight squeezed part, and On the non-skin side of the low basis weight squeezed portion, the non-skin side surface has a second recess formed by being depressed toward the skin side, and the bottom of the first high-pressure squeezed portion and the first The distance between the bottom portion of the first recess and the bottom portion of the first high pressing portion is the distance between the bottom portion of the second high pressing portion and the bottom portion of the second recess facing the bottom portion of the second high pressing portion. The same absorbent article as described in (1) above may be used.
The present absorbent article has the above configuration. Therefore, the thickness of the absorber below the bottom part of the 1st, 2nd high pressing part currently formed relatively deeply is equal. Thereby, at the time of use of an absorbent article, the function of the 1st and 2nd high pressing parts is made into both high pressing parts in both a high basic weight part and a low basic weight part, suppressing the fracture | rupture and floating of a surface sheet. It can be made to exhibit similarly to the whole pressing part containing a part. However, “same” means that one value is within ± 10% of the other value. In addition, the first and second recesses are formed, so that the surface sheet is pushed into the absorbent body during the squeezing (manufacturing) to the extent that the top sheet is pushed into the absorbent body. It can be made smaller compared to the extent to which Thereby, it can suppress that a surface sheet peels from an absorber.

In the absorbent article of the present invention, (3) the high basis weight squeezing part and the low basis weight squeezing part are along the longitudinal direction on both outer sides in the width direction of the excretory opening contact area of the absorbent article. The absorbent article according to (1) or (2), which is continuously formed adjacent to each other.
The present absorbent article has the above configuration. Therefore, in the absorbent article, on both outer sides in the width direction of the excretory opening contact area, pressing parts (a high basis weight pressing part and a low basis weight pressing part) continuously extending along the longitudinal direction are formed. Yes. Therefore, when using the absorbent article, the excretory liquid can be diffused along the longitudinal direction regardless of the basis weight of the absorbent body, and both the outer sides in the width direction of the excretory opening contact area are along the longitudinal direction. It can be bent and deformed (example: deformed into a substantially W shape). Thereby, it is possible to improve the absorption performance while suppressing breakage and floating of the surface sheet, and it is possible to fit the absorbent article to the wearer's body.

The absorbent article of this invention is (4) The said high basic weight pressing part and the said low basic weight pressing part are mutually adjacently formed, and the said back sheet of the bottom part of a said 1st low pressing part The difference between the height from the back sheet and the height from the back sheet of the bottom of the second low pressure portion is the height from the back sheet of the bottom portion of the second high pressure portion and the bottom of the second low pressure portion. The absorbent article according to any one of (1) to (3), which is smaller than a difference from a height from the back sheet.
The present absorbent article has the above configuration. Therefore, the difference of the height of the bottom part of the 1st low pressure pressing part and the height of the bottom part of the 2nd low pressure pressing part in the high basic weight pressing part and the low basic weight pressing part is formed relatively small. Therefore, in the 1st low pressing part and the 2nd low pressing part formed continuously, the level | step difference of the bottom part of a 1st low pressing part and the bottom part of a 2nd low pressing part can be made small, Therefore, in the level | step difference In each of the high basis weight part and the low basis weight part, the function of each pressing part that is continuously formed is similarly exerted on each entire pressing part while suppressing the surface sheet from peeling off or floating. be able to.

In the absorbent article of the present invention, (5) a difference between a height from the back sheet of the bottom of the second low-pressure portion and a height from the back sheet of the bottom of the second high-pressure portion is the first. Said (1) thru | or (4) which is 30% or more of the difference of the height from the said back surface sheet of the bottom part of a low pressing part, and the height from the said back sheet of the said 1st high pressing part. The absorbent article as described in any one of these may be sufficient.
The present absorbent article has the above configuration. Therefore, it can suppress that the difference of the position of the bottom part of the 2nd low pressing part of a low basic weight part and the position of the bottom part of a 2nd high pressing part in a surface sheet becomes large. Therefore, it is possible to further suppress the breakage / floating of the surface sheet.

In the absorbent article of the present invention, (6) the difference between the height of the bottom portion of the first low-pressure portion from the back sheet and the height of the bottom portion of the first high-pressure portion from the back sheet is the first difference. 20% or more and 100% or less of the height from the back sheet of the bottom of the low-pressure part, and the height of the bottom of the second low-pressure part from the back sheet and the bottom of the second high-pressure part. The difference from the height from the back sheet is 20% or more and 100% or less of the height from the back sheet of the bottom of the second low-pressure portion, any one of (1) to (5) above. The absorbent article described in 1. above.
The present absorbent article has the above configuration. In this way, by setting the relationship between the heights in the above range, it is possible to further suppress the breakage / floating of the topsheet. Thereby, a 1st, 2nd high pressing part and a 1st, 2nd low pressing part can make it easy to show | play effects, such as damming of a waste liquid, spreading | diffusion, absorption.

In the absorbent article of the present invention, (7) the low basis weight squeezed part has a shape that intersects or bends at an acute angle in a plan view, according to any one of (1) to (6) above. The absorbent article described may be used.
The present absorbent article has the above configuration. Such a squeezing part (low basis weight squeezing part) may be used when inducing the excretion fluid excreted into the absorbent article in a desired direction, but the intersecting part and the corner part are likely to be hard, There is a risk of making the wearer feel uncomfortable. Then, in this absorbent article, since the location where the cross | intersection and the corner were formed in the low basic weight part, it can suppress that those locations become hard. Thereby, at the time of use of an absorptive article, the hardness of the location where the pressing part crossed, and the corner of a corner can be controlled, suppressing the fracture and floating of a surface sheet.

  According to the present invention, in an absorbent article comprising an absorbent body having a high basis weight part and a low basis weight part, and a top sheet, and having a squeezed part recessed from the top sheet side toward the absorbent body, When the absorbent article is used, it is possible to provide an absorbent article capable of suppressing the surface sheet from floating or breaking from the absorbent body.

It is a top view which shows the absorbent article which concerns on embodiment. It is sectional drawing along the IIa-IIa line | wire and IIb-IIb line | wire of FIG. It is the elements on larger scale of the absorbent article of FIG. It is a schematic diagram which shows the structural example of the manufacturing apparatus of the absorbent article which concerns on embodiment. It is a top view which shows the structural example of the convex part of the 1st roll of the pressing device of FIG. It is a schematic diagram which shows the structural example of the convex part for high basic weights of the convex part of FIG. 5, and the convex part for low basic weights.

  Hereinafter, the manufacturing method of the absorbent article according to the present embodiment will be described using a sanitary napkin as an example of the absorbent article. However, the present invention is not limited to the examples, and can be applied to various absorbent articles without departing from the scope of the subject matter of the present invention. Examples of absorbent articles include panty liners, light incontinence pads, and disposable diapers.

First, the structure of the sanitary napkin 1 according to the present embodiment will be described.
1-3 is a figure which shows the structural example of the sanitary napkin 1 which concerns on this Embodiment. 1 is a plan view of the sanitary napkin 1, FIG. 2 (a) is a cross-sectional view taken along the line IIa-IIa in FIG. 1, and FIG. 2 (b) is taken along the line IIb-IIb in FIG. FIG. 3 is a partially enlarged plan view of the absorbent article of FIG. 1. The sanitary napkin 1 has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other, and has a body portion 1a extending in the longitudinal direction L and a width at a substantially central portion in the longitudinal direction L of the body portion 1a. A pair of flap portions 1b and 1b extending to both outer sides in the direction W are provided. In FIG. 1, the upper side is the front (in the longitudinal direction L) of the sanitary napkin 1, and the lower side is the rear (in the longitudinal direction L) of the sanitary napkin 1. The sanitary napkin 1 has a longitudinal center line C _L (virtual line) extending in the longitudinal direction L through the center in the width direction W and a width direction center line C _W (imaginary line) extending in the width direction W through the center in the longitudinal direction L. Line). A direction toward the longitudinal center line _CL and a direction away from the center line CL are defined as an inner direction and an outer direction of the width direction W, respectively. A direction toward the width direction center line _CW and a direction away from the center line _CW are defined as an inner direction and an outer direction of the longitudinal direction L, respectively. Viewing the sanitary napkin 1 placed on a plane including the longitudinal direction L and the width direction W from above the thickness direction T is referred to as “planar view”, and the shape grasped in plan view is referred to as “planar shape”. . “Skin side” and “non-skin side” mean a side closer to the wearer's skin surface and a side far from the skin surface in the thickness direction T when the sanitary napkin 1 is worn. The sanitary napkin 1 is further positioned on the longitudinal end E _L1 located on the front side in the longitudinal direction L, the longitudinal end E _L2 located on the rear side, and one side (the same left side) in the width direction W. having a widthwise end portion E _W1, and a widthwise end portion E _W2 located on the other side (the right side) to be. These definitions are commonly used for each material of the sanitary napkin 1.

The main body 1a has a vertically long shape in the longitudinal direction L. Examples of the vertically long shape include a rounded rectangle, an ellipse, an oval shape, an hourglass shape, and similar shapes. Edges of both ends in the longitudinal direction L of the main body 1a, that is, the longitudinal end E _L1 and the longitudinal end E _L2 have a substantially semicircular or bowl shape. The flap portion 1b has a shape extending to both outer sides in the width direction W of the main body portion 1a. Examples of the extending shape include a semicircular shape, a semi-elliptical shape, a trapezoidal shape, and similar shapes.

Main body 1a includes a liquid-permeable topsheet 2 forming the surface F ₁ of the skin side of the sanitary napkin 1, the backsheet of liquid-impermeable constituting the surface F ₂ of the non-skin side of the sanitary napkin 1 3 and a liquid-absorbing and liquid-retaining absorbent 4 arranged between the top sheet 2 and the back sheet 3. The absorbent body 4 may include an absorbent core and a core wrap that covers the absorbent core, and a plurality of absorbent bodies or a plurality of absorbent cores may be laminated. In the main body 1a, the non-skin side surface of the top sheet 2 and the skin side surface of the absorber 4 are joined together with an adhesive or the like, and the non-skin side surface of the absorber 4 and the skin side surface of the back sheet 3 Are joined with an adhesive or the like, and the edge of the non-skin side surface of the top sheet 2 and the edge of the skin side surface of the back sheet 3 are joined with an adhesive. In the flap part 1b, the edge of the non-skin side surface of the top sheet 2 and the edge of the skin side surface of the back sheet 3 are joined with an adhesive.

In the region where the topsheet 2 and the absorbent body 4 of the main body 1a overlap in the thickness direction T, a region that contacts the wearer's excretion port when worn, that is, the excretion port contact region XA is set. The excretory opening contact area XA is, for example, approximately 1/4 to 1/2 of the entire length of the absorbent body 4 at the approximate center in the longitudinal direction L of the absorbent body 4 and slightly in the center in the width direction W. 4 is set to a width of about 1/2 to 1/3 of the full width. Sanitary napkin 1 includes, between the longitudinal ends _{E L1} and longitudinal ends _{E L2,} has a front region _{A F,} a central region _{A C,} and a rear region _{A B,} the. Central region _{A C} includes excretory opening contact region XA. Front region A _F is adjacent to the front side in the longitudinal direction L of the center region A _C, includes a forward end portion in the longitudinal direction L of the excretory opening contact region XA. Posterior region A _B is adjacent to the rear side of the longitudinal direction L of the center region A _C, including back end portion in the longitudinal direction L of the excretory opening contact region XA.

The absorber 4 is included in the top sheet 2 and the back sheet 3 of the main body 1a and has a vertically long shape in the longitudinal direction L that is slightly smaller than the main body 1a. Examples of the vertically long shape include a rounded rectangle, an ellipse, an oval shape, an hourglass shape, and similar shapes. The absorbent body 4 has a high basis weight part HB having a relatively high basis weight and a low basis weight part LB having a relatively low basis weight. In the present embodiment, the high basis weight parts HB1 to HB4 and And having a low basis weight part LB1 to LB4. Low basis weight portion LB1 is the front region A _F in the vicinity of the boundary between the front region A _F and the central region A _C, it is disposed so as to extend in the width direction W at a predetermined width. In the present embodiment, the absorber 4 is disposed over the entire region in the width direction W. Low basis weight portion LB2, LB2 are on both sides excluding the central portion of each central region A _C definitive width direction W, it is arranged so as to extend in the width direction W at a predetermined width. Low basis weight portion LB3, LB3 are on both sides excluding the central portion in the width direction W in the central region A _C respectively, extending in the width direction W at a predetermined width, low basis weight portion in the longitudinal direction L LB2, LB2 of It is arranged behind the back. In the present embodiment, the low basis weight portions LB2, LB2, LB3, and LB3 are arranged so as to reach the end portions of the absorbent body 4 in the width direction W, respectively. Low basis weight portion LB4 is the center in the width direction W of the rear region A _B, the low basis weight portion LB4a arranged to extend in the longitudinal direction L by a predetermined width, the longitudinal direction L of the rear area A _B And a low basis weight portion LB4b that extends in the width direction W with a predetermined width and is arranged so as to intersect with the low basis weight portion LB4a. The low basis weight part LB is a part having a relatively low basis weight of a liquid-absorbing and liquid-retaining absorbent material that constitutes the absorbent body 4, for example, hydrophilic fibers and high-absorbent polymers. HB is a portion where the basis weight of the absorbent material constituting the absorber 4 is relatively high. Accordingly, the portion (position) corresponding to the low basis weight portion LB of the absorbent body 4 in the sanitary napkin 1 has a lower rigidity than the portion (position) corresponding to the high basis weight portion HB, and is relatively easy to bend. is there. Thereby, the excretion opening | mouth contact | abutting area XA of the absorber 4 can be easily deform | transformed into a shape pressed against a wearer's skin at the time of mounting | wearing. And the fitting property of the sanitary napkin 1 can be improved, a comfortable wearing feeling can be given to the wearer, and leakage of menstrual blood can be effectively suppressed.

  The main body 1a includes a pressing part, for example, a pressing part around the excretion opening contact area XA. In this Embodiment, the main-body part 1a is provided with the pressing part 5, a pair of pressing parts 7 and 7, a pair of pressing parts 8 and 8, and the pressing part 6. FIG. Each pressing part is formed by pressing the top sheet 2 and the absorber 4 from the skin side toward the non-skin side, that is, from the top sheet 2 side toward the absorber 4 side. Therefore, each pressing part has the shape in which the surface sheet 2 and the absorber 4 were dented toward the absorber 4 side from the surface sheet 2 side, and has joined the surface sheet 2 and the absorber 4 at least.

The pressing part 5 is arrange | positioned at the front outer side of the longitudinal direction L in the excretion opening | mouth contact | abutting area XA. In other words, compressing portions 5 in the longitudinal direction L, it is disposed at the center portion in the front region A _F in the width direction W, and is disposed at the center portion of the front region A _F. In the present embodiment, the pressing unit 5 has a closed curved shape such as a heart shape. A pair of pressing parts 7 and 7 are arrange | positioned along the longitudinal direction L at the both ends of the width direction W in the part from the front of the longitudinal direction L to the center in the excretion opening | mouth contact | abutting area XA. In other words, the pair of compressing portions 7, 7 in the longitudinal direction L, are arranged from the rear end in the front region A _F over the central portion in the central region A _C, in the width direction W, the excretory opening contact It arrange | positions along the both ends of the area | region XA. In this embodiment, the compressing portion 7 has a curved shape, such as a gentle wavy, a pair of compression portions 7, 7 are symmetric with respect to the longitudinal center line C _L. A pair of pressing parts 8 and 8 are arrange | positioned along the longitudinal direction L in the both ends of the width direction W in the rear part of the longitudinal direction L in the excretion opening | mouth contact | abutting area XA. That is, the pair of squeezing portions 8, in the longitudinal direction L, are arranged behind the portions in the central region A _C, in the width direction W, and is disposed along the opposite ends of the excretory opening contact region XA. In this embodiment, the compressing portion 8 has a curved shape, such as a gentle wavy, a pair of squeezing portions 8 are symmetric with respect to the longitudinal center line C _L. The pressing part 6 is arrange | positioned at the back outer side of the longitudinal direction L in the excretion opening | mouth contact | abutting area XA. In other words, the compressing portion 5 in the longitudinal direction L, is disposed at the center of the portion in the rear region A _B, in the width direction W, and is located in the central portion of the posterior region A _B. In the present embodiment, the pressing unit 6 has a closed curved shape such as a heart shape. The pressing part 5, the pair of pressing parts 7, 7, the pair of pressing parts 8, 8 and the pressing part 6 are arranged so as to surround the excretion opening contact area XA. Each pressing part controls the diffusion in the longitudinal direction L, the width direction W and the thickness direction T of the excretion liquid excreted in the excretion opening contact area XA. The pair of squeezing parts 7 and 7 and the pair of squeezing parts 8 and 8 form a broken line, and the excretory opening contact area XA of the absorbent body 4 can be deformed to be pressed against the wearer's skin at the time of wearing.

  Each of the pressing part 5, the pair of pressing parts 7, 7, the pair of pressing parts 8, 8 and the pressing part 6 has a high basis weight pressing part formed at a position corresponding to the high basis weight part HB, and a low basis weight. A low basis weight squeezed part formed at a position corresponding to the part LB. However, the position corresponding to the high basis weight part HB is a position where the high basis weight part HB of the absorbent body 4 in the laminate of the topsheet 2 and the absorbent body 4 overlaps in the thickness direction T in plan view. Similarly, the position corresponding to the low basis weight part LB is a position where the low basis weight part LB of the absorbent body 4 in the laminate of the topsheet 2 and the absorbent body 4 overlaps in the thickness direction T in plan view. .

  In this Embodiment, the pressing part 5 is provided with the high basic weight pressing part 5b. High basic weight pressing part 5b is formed in the position corresponding to high basic weight part HB1. Each of a pair of pressing parts 7 and 7 is provided with high basic weight pressing parts 7b1 and 7b2 and low basic weight pressing parts 7a1 and 7a2. In each pressing part 7, the low basic weight pressing part 7a1, the high basic weight pressing part 7b1, the low basic weight pressing part 7a2, and the high basic weight pressing part 7b2 are arranged in this order from the front of the longitudinal direction L. High basis weight pressing parts 7b1 and 7b2 are formed at positions corresponding to high basis weight part HB2, and low basis weight pressing parts 7a1 and 7a2 are formed at positions corresponding to low basis weight parts LB1 and LB2, respectively. Each of a pair of pressing parts 8 and 8 is provided with the high basic weight pressing part 8b and the low basic weight pressing part 8a. In each pressing part 8, the low basic weight pressing part 8a and the high basic weight pressing part 8b are located in this order from the front of the longitudinal direction L. The high basis weight pressing portion 8b is formed at a position corresponding to the high basis weight portion HB2, and the low basis weight pressing portion 8a is formed at a position corresponding to the low basis weight portion LB3. The pressing unit 6 includes high basis weight pressing units 6b1, 6b2, 6b3, 6b4 and low basis weight pressing units 6a1, 6a2, 6a3, 6a4. In the pressing unit 6, the low basis weight pressing unit 6a1, the high basis weight pressing unit 6b1, the low basis weight pressing unit 6a2, the high basis weight pressing unit 6b2, the low basis weight pressing unit 6a3, the high basis weight pressing unit 6b3, and the low basis weight. The pressing part 6a4 and the high basic weight pressing part 6b4 are arranged in this order. The low basis weight pressing parts 6a1, 6a2, 6a3, 6a4 are formed at positions corresponding to the low basis weight parts LB4 (mainly LB4a), LB4 (LB4b), LB4 (mainly LB4a), LB4 (LB4b), respectively. The basis weight pressing parts 6b1, 6b2, 6b3, 6b4 are respectively formed at positions corresponding to the high basis weight parts HB2, HB4, HB3, HB2.

  Each low basic weight pressing part includes a second high pressing part and a second low pressing part that is adjacent to the second high pressing part and is recessed more shallowly than the second high pressing part. In this Embodiment, each of the low basic weight pressing part 7a1, 7a2, 8a, 6a1, 6a2, 6a3, 6a4 is adjacent to the 2nd high pressing part 21a and the 2nd high pressing part 21a, and the 2nd high pressing part 2nd low pressing part 22a hollowed shallower than the surface sheet 2 rather than the part 21a. For example, the low basic weight pressing part 6a3 of the low basic weight part LB4a shown in FIG. 2A and FIG. The low basis weight pressing part 6a3 is adjacent to the second high pressing part 21a and the second high pressing part 21a formed in a substantially circular shape, is recessed shallower than the second high pressing part 21a, and is formed in a substantially strip shape. 2 The low pressing part 22a is included. The second high pressing portion 21a includes a bottom portion 21aBT and a side wall portion 21aSW, and the second low pressing portion 22a includes a bottom portion 22aBT and a side wall portion 22aSW.

Here, the height of the bottom 22aBT of the second low compression portion 22a Ua2 is the height of the thickness direction T from the surface _{F 3} of the skin side of the backsheet 3. The height of the bottom 21aBT of the second high compression portion 21a Ua1 is the height of the thickness direction T from the surface _{F 3} of the backsheet 3. The difference between the height Ua2 and the height Ua1 is ΔUa. The thickness of the low basis weight part LB is Ta. It can be said that the bottom part 21aBT of the 2nd high pressing part 21a, the bottom part 22aBT of the 2nd low pressing part 22a, and its lower part are the high-density parts by which the fiber of the absorber 4 was compressed to high density. In the present embodiment, for example, the height Ua2 of the bottom 22aBT of the second low-pressure portion 22a is 350 to 10,000 μm, and the height Ua1 of the bottom 21aBT of the second high-pressure portion 21a is 100 to 9000 μm. The difference ΔUa between the height Ua2 and the height Ua1 is, for example, 250 to 1000 μm. As for thickness Ta of the low basic weight part LB, 0.8-19 mm is mentioned, for example.

In this Embodiment, the absorber 4 has further the recessed part formed in the non-skin side of the low basic weight pressing part in which the non-skin side surface was dented toward the skin side, and low basic weight It has the 2nd recessed part 23a in the non-skin side of the pressing part 6a3. The 2nd recessed part 23a is formed so that it may overlap with the 2nd high pressing part 21a and the 2nd low pressing part 22a by planar view. In the thickness direction T, the distance ΔVa between the bottom portion 21aBT of the second high-pressure portion 21a and the bottom portion of the second recess portion 23a facing the bottom portion 21aBT is a second portion 22aBT and the bottom portion 22aBT of the second low-pressure portion 22a. It is smaller than the distance from the bottom of the recess 23a. Moreover, in the thickness direction T, the depth (Ta-Ua1) from the non-skin-side surface of the topsheet 2 in the bottom 21aBT of the second high pressing portion 21a is at the bottom of the second recess 23a facing the bottom 21aBT. may be greater than the height Va from the surface F ₃ of the skin side of the backsheet 3, it may be smaller.

  Each high basic weight pressing part includes a first high pressing part and a first low pressing part that is adjacent to the first high pressing part and is recessed shallower than the first high pressing part. In the present embodiment, each of the high basis weight pressing parts 7b1, 7b2, 8b, 6b1, 6b2, 6b3, 6b4 is adjacent to the first high pressing part 21b and the first high pressing part 21b, and the first high pressing part 21b. 1st low pressing part 22b hollowed shallower than the surface sheet 2 rather than the part 21b. For example, the high basis weight pressing part 6b3 of the high basis weight part HB3 shown in FIG. 2B and FIG. 3 will be described on behalf of the high basis weight pressing part. The high basis weight pressing part 6b3 is adjacent to the first high pressing part 21b and the first high pressing part 21b formed in a substantially circular shape, is recessed shallower than the first high pressing part 21b, and is formed in a substantially strip shape. 1 The low pressing part 22b is included. The first high pressure portion 21b includes a bottom portion 21bBT and a side wall portion 21bSW, and the first low pressure portion 22b includes a bottom portion 22bBT and a side wall portion 22bSW.

Here, the height of the bottom 22bBT of the first low compression portion 22b Ub2 is the height of the thickness direction T from the surface _{F 3} of the skin side of the backsheet 3. The height of the bottom 21bBT of the first high compression portion 21b Ub1 is the height of the thickness direction T from the surface _{F 3} of the backsheet 3. The difference between the height Ub2 and the height Ub1 is ΔUb. The thickness of the high basis weight portion HB is Tb. The bottom part 21bBT of the first high-pressure part 21b, the bottom part 22bBT of the first low-pressure part 22b, and the part below the bottom part 21bBT can be said to be a high-density part in which the fibers of the absorbent body 4 are compressed with high density. In the present embodiment, for example, the height Ub2 of the bottom portion 22bBT of the first low pressure portion 22b is 450 to 12000 μm, and the height Ub1 of the bottom portion 21bBT of the first high pressure portion 21b is 100 to 10,000 μm. The difference ΔUb between the height Ub2 and the height Ub1 is, for example, 350 to 2000 μm. As for thickness Tb of the high basic weight part HB, 1-20 mm is mentioned.

In the present embodiment, the absorbent body 4 further has a recess formed on the non-skin side of the high basis weight squeezed portion so that the surface on the non-skin side is recessed toward the skin side. It has the 1st crevice 23b in the non-skin side of pressing part 6b3. The 1st recessed part 23b is formed so that it may overlap with the 1st high pressing part 21b and the 1st low pressing part 22b by planar view. In the thickness direction T, the distance ΔVb between the bottom portion 21bBT of the first high-pressure portion 21b and the bottom portion of the first concave portion 23b facing the bottom portion 21bBT is a first portion 22bBT and the bottom portion 22bBT of the first low-pressure portion 22b. It is smaller than the distance from the bottom of the recess 23b. Moreover, in the thickness direction T, the depth (Tb-Ub1) from the non-skin-side surface of the top sheet 2 in the bottom 21bBT of the first high-pressure portion 21b is at the bottom of the first recess 23b facing the bottom 21bBT. it may be greater than the height Vb from the surface F ₃ of the skin side of the backsheet 3, may be smaller.

Here, the bottom height from the surface _{F 3} of the backsheet 3 in the height Ua1 from the surface _{F 3} of the skin side of the back sheet 3 and the bottom 22aBT of the second low compression portion 22a of the 21aBT the second high compression portion 21a difference ΔUa with Ua2 is high from the first high compression portion 21b bottom height Ub1 from the surface _{F 3} of the backsheet 3 of 21bBT first surface _{F 3} of the backsheet 3 of the bottom 22bBT of low compression portion 22b of the It is smaller than the difference ΔUb from the length Ub2. Therefore, ΔUa <ΔUb. That is, in the low basic weight part LB, the distance of the bottom part 21aBT of the 2nd high pressing part 21a and the bottom part 22aBT of the 2nd low pressing part 22a is made relatively small. In the present embodiment, for example, (ΔUb−ΔUa) is 100 to 1000 μm.

  The shape and size of the first high pressing portion 21b and the second high pressing portion 21a in plan view, that is, the shape and size of the bottom portion 21bBT and bottom portion 21aBT in plan view are not particularly limited. Examples of these shapes include a circle, an ellipse, a polygon, a star, and the like. In this embodiment, the shape is a circle. For example, in the case of a circular shape, the size is preferably 0.5 to 3 mm, and preferably 1 to 2 mm mainly from the viewpoint of improving absorption performance and reducing hardness. The bottom portion 21bBT of the first high-pressure portion 21b is formed at a position away from the skin-side surface of the absorbent body 4 by a predetermined depth in the thickness direction T. Examples of the predetermined depth include 50% or more and less than 100% of the thickness Tb of the high basis weight portion HB of the absorber 4. The bottom portion 21aBT of the second high pressing portion 21a is formed at a position away from the skin-side surface of the absorbent body 4 by a predetermined depth in the thickness direction T. Examples of the predetermined depth include 50% or more and 100% or less of the thickness Ta of the low basis weight portion LB of the absorber 4.

  The shape and size of the first low pressure portion 22b and the second low pressure portion 22a in plan view, that is, the shape and size of the bottom portion 22bBT and bottom portion 22aBT in plan view, respectively, are the first high pressure portion 21b and the second high pressure portion 21b, respectively. If the part 21a is included, it will not be specifically limited. Examples of the shape include a curved shape, a straight shape, a band shape of a combination thereof, a circular shape, an elliptical shape, a polygonal shape, a star shape, and the like. In the present embodiment, a belt shape surrounding a predetermined region, and It is a gentle curve type. In addition, in the case of a belt type, for example, the size is preferably 0.5 to 4 mm in width, and preferably 1 to 3 mm mainly from the viewpoint of improving absorption performance and reducing hardness. The bottom portion 22bBT of the first low pressing portion 22b is formed at a position away from the skin-side surface of the absorbent body 4 by a predetermined depth in the thickness direction T. Examples of the predetermined depth include 30% or more and 80% or less of the thickness Tb of the high basis weight portion HB of the absorber 4. The bottom portion 22aBT of the second low-pressure portion 22a is formed at a position away from the skin-side surface of the absorbent body 4 by a predetermined depth in the thickness direction T. Examples of the predetermined depth include 40% or more and 90% or less of the thickness Ta of the low basis weight portion LB of the absorbent body 4.

  Moreover, each high basic weight part mentioned above, each low basic weight part, each pressing part (each high basic weight pressing part and each low basic weight pressing part, each 1st high pressing part, each 2nd high pressing part, each The number, position, and shape of the first low-pressure parts and the respective second low-pressure parts are examples, and the present invention is not limited to the examples.

  Moreover, the case where the timing of conveyance of the absorber 4 and the timing of pressing for formation of the pressing parts 5-8 may slightly shift for convenience of manufacture may occur. In that case, in the vicinity of the boundary between the low basis weight portion LB and the high basis weight portion HB in the absorbent body 4, a high basis weight pressing portion is formed in the low basis weight portion LB, or the high basis weight portion HB is low in basis weight. A quantity pressing part is formed. Then, the high basis weight portion HB has a low basis weight pressing portion and the absorbent body 4 becomes hard, or the low basis weight portion LB has a high basis weight pressing portion and the topsheet 2 is an absorbent body. Floating from 4 can be considered. However, if a high basis weight squeezed part is formed in the low basis weight part LB in a part near the boundary, or a low basis weight squeezed part is formed in the high basis weight part HB, next to it Since the pressing part optimal for each basis weight is provided and connected, it is possible to prevent the absorber 4 from becoming hard or to prevent the topsheet 2 from floating from the absorber 4, and the same as in the case of no deviation. There is an effect.

  The main body portion 1a and the pair of flap portions 1b, 1b of the sanitary napkin 1 include a plurality of fixing portions (not shown) for fixing the sanitary napkin 1 to clothes on the skin surface side of the back sheet 3. The plurality of fixing portions are covered with a release sheet (not shown). The plurality of fixing portions of the main body 1a have, for example, a shape extending in a strip shape in the longitudinal direction L of the sanitary napkin 1, and are arranged at predetermined intervals in the width direction W of the sanitary napkin 1. The fixing portion of the flap portion 1b has a shape extending in a strip shape in the longitudinal direction L of the sanitary napkin 1, for example. The sanitary napkin 1 may further include an auxiliary sheet (not shown) that assists the diffusion of the liquid between the top sheet 2 and the absorbent body 4.

As materials for the top sheet 2, the absorber 4, the back sheet 3, the auxiliary sheet, the fixing portion, and the release sheet, known materials that can be generally used for the sanitary napkin 1 can be used. Examples of the material for the surface sheet 2 include a nonwoven fabric, a woven fabric, a synthetic resin film in which liquid permeation holes are formed, and a composite sheet thereof. Examples of the nonwoven fabric include natural fibers, regenerated fibers, inorganic fibers, and synthetic resin fibers. The basis weight of the topsheet 2, for example ^{5 g} / m 2 to 100 g / ^{m 2} can be ^{mentioned, 20g / m 2 ~50g / m} 2 is preferred. As thickness of the surface sheet 2, 0.2-5 mm is mentioned, for example. Examples of the material of the absorbent body 4 include water-absorbing fibers such as pulp fibers and synthetic fibers, and superabsorbent polymers (SAP). As a basic weight of the fiber of the absorber 4, 5-1000 g / m < ² > is mentioned, for example. Among these, the basic weight of the high basic weight part HB is 150-1000 g / m < ² >, for example, and 300-600 g / m < ² > is preferable from an absorbent viewpoint and a mounting | wearing viewpoint. On the other hand, the basis weight of the low basis weight portion LB, for example 50 to 300 g / ^{m 2} can be mentioned, 50 to 150 g / ^{m 2} is preferable in view of the absorbent aspects and deformability. The basis weight of the superabsorbent polymer, for example 0~500g / ^{m 2} can be mentioned, 10 to 400 g / ^{m 2} is preferred. As for the thickness of the absorber 4, 1-50 mm is mentioned, for example, and 5-30 mm is preferable. When the absorbent body 4 includes an absorbent core and a core wrap, examples of the material of the absorbent core include a water-absorbent fiber and a superabsorbent polymer. The core wrap material includes a liquid-permeable hydrophilic material such as a tissue. Fiber. Examples of the material of the back sheet 3 include a waterproof nonwoven fabric, a synthetic resin film, a composite sheet of a nonwoven fabric and a synthetic resin film, and an SMS nonwoven fabric. Examples of the material for the auxiliary sheet include nonwoven fabric, pulp fiber, and synthetic fiber. Examples of the material for the fixing part include an adhesive such as a styrene-butadiene copolymer. Examples of the release sheet material include a paper or resin sheet base material coated with a silicone resin release material. As the adhesive for joining the materials, a known material that can be used for the sanitary napkin 1 can be used, and examples thereof include a hot melt adhesive.

  As described above, the sanitary napkin 1 (absorbent article) according to the present embodiment includes the first high-pressure portion 21b and the first low-pressure portion 22b in the high basis weight portion HB as the pressing portion. In the basic weight part LB, it has the 2nd high pressing part 21a and the 2nd low pressing part 22a. The difference ΔUa between the height Ua1 of the bottom portion 21aBT of the second high-pressure portion 21a and the height Ua2 of the bottom portion 22aBT of the second low-pressure portion 22a in the low basis weight portion LB is the first height in the high basis weight portion HB. It is smaller than the difference ΔUb between the height Ub1 of the bottom portion 21bBT of the pressing portion 21b and the height Ub2 of the bottom portion 22bBT of the first low pressing portion 22b. That is, in the low basic weight part LB, the distance of the bottom part 21aBT of the 2nd high pressing part 21a and the bottom part 22aBT of the 2nd low pressing part 22a is made relatively small. Therefore, it can be made difficult to bend in the area | region between bottom part 21aBT of the 2nd high pressing part 21a, and bottom part 22aBT of the 2nd low pressing part 22a. In other words, the bent line (not shown) of the bending deformation can be made difficult to be located in the region between the bottom portion 21aBT and the bottom portion 22aBT, and the position where the bending occurs can be shifted to another region. In addition, even if the broken line is located in the region between the bottom portion 21aBT and the bottom portion 22aBT, the distance between the bottom portion 21aBT and the bottom portion 22aBT is relatively small, so that bending deformation occurs in the low basis weight portion LB. At this time, it is possible to reduce the force generated between the bottom portion 21aBT and the bottom portion 22aBT in the direction away from each other. Therefore, even when the bending deformation is repeated at the time of use of the absorbent article, in the low basis weight portion LB, the top sheet 2 floats or breaks from the absorber 4 due to the force in the separating direction at the bottom portion 21aBT or the bottom portion 22aBT. Can be suppressed. Thereby, the 2nd high pressing part 21a and the 2nd low pressing part 22a can make it easy to show | play effects, such as damming of a waste liquid, spreading | diffusion, absorption. Thus, the absorption body 4 having the high basis weight portion HB and the low basis weight portion LB, and the topsheet 2, an absorption having a squeezed portion that is recessed from the topsheet 2 side toward the absorber 4 side. In the absorbent article, when the absorbent article is used, the topsheet 2 can be prevented from floating from the absorbent body 4 or breaking.

  In the present embodiment, as a preferred aspect, the distance ΔVb between the bottom 21bBT of the first high-compression section 21b and the bottom of the first recess 23b facing the bottom 21bBT of the first high-compression section 21b is the second high-compression section 21a. The distance ΔVa is preferably the same as the distance ΔVa between the bottom 21aBT of the second concave portion 23a facing the bottom 21aBT of the second high pressing portion 21a. However, the same means that one value is within ± 10% of the other value. That is, the thickness ΔVb of the absorber 4 below the bottom portion 21bBT of the first high-pressure portion 21b and the thickness ΔVa of the absorber 4 below the bottom portion 21aBT of the second high-pressure portion 21a. And are all on the whole. In other words, out of the first low pressure portion 22b and the second low pressure portion 22a that are formed relatively shallow, the bottom portion 22bBT of the first low pressure portion 22b and the bottom portion 22bBT of the first low pressure portion 22b are opposed. It is preferable that the distance with the bottom part of the 1st recessed part 23b is larger than the distance of bottom part 22aBT of the 2nd low pressing part 22a, and the bottom part of the 2nd recessed part 23a facing the bottom part 22aBT of the 2nd low pressing part 22a. In the present embodiment, for example, (ΔVb−ΔVa) is approximately 0 to 50 μm, and (the distance between the bottom portions in the first low-pressure squeezed portion 22b−the distance between the bottom portions in the second low-pressure squeezed portion 22a) is In general, the thickness is 200 to 2000 μm.

  In that case, in the sanitary napkin 1 (absorbent article), ΔVb is the same as ΔVa as described above. That is, the thickness of the absorber 4 below the bottom of the first high pressing portion 21b formed relatively deeply and the thickness of the absorber 4 below the bottom of the second high pressing portion 21a are entirely aligned. ing. Thereby, at the time of use of the sanitary napkin 1, the first high-pressure portion 21b and the second high-pressure portion are suppressed in both the high basis weight portion HB and the low basis weight portion LB while suppressing breakage and floating of the top sheet 2. The function of the part 21a can be similarly exerted on the entire pressing part including the first high pressing part 21b and the second high pressing part 21a. Moreover, the 1st, 2nd recessed part 23a, 23b is formed, and the surface sheet 2 is the time of pressing (manufacturing) the extent to which the surface sheet 2 is pushed into the inside of the absorber 4 in a pressing part. It can be made smaller than the extent of being pushed into the absorber 4. Thereby, it can suppress that the surface sheet 2 peels from the absorber 4. FIG.

In a preferred embodiment in the form of the embodiment, the second low compression portion 22a bottom backsheet 3 between the height Ua2 bottom 21aBT of the second high compression portion 21a from the surface _{F 3} of the skin side of the backsheet 3 of 22aBT of the difference ΔUa between the height Ua1 from the surface _{F 3} of the backsheet of the height from the surface _{F 3} of the backsheet 3 of the bottom 22bBT of the first low compression portion 22b Ub2 the bottom 21bBT of the first high-compression portions 21b 3 of the surface _{F 3} 30% of the difference ΔUb between the height Ub1 or from, is preferably 80% or less. That is, ΔUa / ΔUb = 0.3 to 0.8. In the present embodiment, for example, when ΔUa is 300 to 800 μm and ΔUb is 1000 μm, ΔUa / ΔUb is 30% to 80%.

  In that case, in the sanitary napkin 1 (absorbent article), as described above, ΔUa in the low basis weight part LB is 30% or more and 80% or less of ΔUb (100%) in the high basis weight part HB. Therefore, it is possible to suppress an increase in the difference between the position of the bottom portion 22aBT of the second low-pressure portion 22a of the low basis weight portion LB and the position of the bottom portion 21aBT of the second high-pressure portion 21a. Therefore, the breakage / floating of the topsheet 2 can be further suppressed. However, when ΔUa exceeds 80% of ΔUb, ΔUa of the low basis weight portion LB becomes relatively large, and the effect of suppressing breakage / floating of the topsheet 2 decreases. When ΔUa is less than 30% of ΔUb, ΔUa of the low basis weight portion LB becomes relatively small. Therefore, in the low basis weight portion LB, the bottom portion 22aBT of the second low pressure portion 22a is the second high pressure portion 21a. Approaching the bottom portion 21aBT, the area of the bottom portion 21aBT of the second high pressing portion 21a is substantially enlarged. Therefore, the low basis weight squeezed portion becomes hard, the low basis weight portion LB becomes difficult to bend and deform, and the wearer may feel uncomfortable.

In a preferred embodiment in this embodiment, the bottom surface of the backsheet 3 of 21bBT first height Ub2 from the surface _{F 3} of the skin side of the backsheet 3 of the bottom 22bBT of low compression portion 22b first high compression portion 21b difference ΔUb between the height Ub1 from F _3, the first low compression portion 22b bottom 22bBT backsheet 3 of the surface _{F 3} 30% of the height Ub2 more from, is preferably 100% or less. The difference between the height Ua1 from the second low compression portion 22a bottom surface _{F 3} of the backsheet 3 in the height Ua2 from the surface _{F 3} of the back sheet 3 and the bottom 21aBT of the second high compression portion 21a 22ABT of ΔUa, the second low compression portion 22a bottom 22aBT backsheet 3 of the surface _{F 3} 30% of the height Ua2 more from, is preferably 100% or less. That is, ΔUb / Ub2 = 0.3 to 1, and ΔUa / Ua2 = 0.3 to 1. In this embodiment, for example, when ΔUb is 500 μm and Ub2 is 500 μm to 1600 μm, ΔUb / Ub2 is 31% to 100%, and when ΔUa is 400 μm and Ua2 is 400 μm to 1300 μm, ΔUa / Ua2 is 31%. ~ 100%.

  In this case, in the sanitary napkin 1 (absorbent article), as described above, ΔUb in the high basis weight portion HB is 20% or more and 100% or less of Ub2 (100%). And (DELTA) Ua in the low basic weight part LB is 20% or more and 100% or less of Ua2 (100%). In this way, by setting the relationship between the heights in the above range, it is possible to further suppress breakage / floating of the topsheet 2. Thereby, the 1st high pressing part 21b, the 2nd high pressing part 21a, the 1st low pressing part 22b, and the 2nd low pressing part 22a can make it easy to show actions, such as damming, diffusion, and absorption of excretion fluid.

In the present embodiment, as a preferable aspect, the high basis weight pressing parts 6b1 to 6b4, 7b1, 7b2, and 8b and the low basis weight pressing parts 6a1 to 6a4, 7a1, 7a2, and 8a are continuously formed adjacent to each other. It is preferable that The height from the first surface _{F 3} of the bottom 22aBT of the backsheet 3 of the height Ub2 from the surface _{F 3} of the skin side of the backsheet 3 of the bottom 22bBT of low compression portion 22b second lower compression portions 22a Ua2 the difference between the height from the second high compression portion 21a bottom height Ua1 from the surface _{F 3} of the backsheet 3 of 21aBT second low compression portion 22a surface _{F 3} of the backsheet 3 of the bottom 22aBT of Ua2 Is preferably smaller than the difference ΔUa. That is, the height Ub2 and the second low of the bottom portion 22bBT of the first low pressure portion 22b in the high basis weight pressing portions 6b1 to 6b4, 7b1, 7b2, 8b and the low basis weight pressing portions 6a1 to 6a4, 7a1, 7a2, 8a. The difference with height Ua2 of bottom part 22aBT of pressing part 22a is formed relatively small. That is, (Ub2-Ua2) <(Ua1-Ua2) = ΔUa. In the present embodiment, for example, (Ub2-Ua2) is approximately 50 to 300 μm, and (Ua1−Ua2) = ΔUa is 300 to 800 μm.

  In that case, in the sanitary napkin 1 (absorbent article), as described above, the high basis weight squeezing part and the low basis weight squeezing part are continuously formed adjacent to each other, and the difference between Ub2 and Ua2 is It is smaller than ΔUa, and thus is relatively small. Therefore, in the first low pressure portion 22b and the second low pressure portion 22a that are continuously formed, the step between the bottom portion 22bBT and the bottom portion 22aBT can be reduced. Therefore, each pressing part (high-tsubo) formed continuously in any of the high basic weight part HB and the low basic weight part LB, suppressing that the surface sheet 2 peels off or floats at the level difference. The functions of the mass squeezing part and the low basis weight squeezing part) can be exerted on the entire squeezing part as well.

  In the present embodiment, as a preferred embodiment, the low basis weight squeezed part (exemplary: low basis weight squeezed part 6a1) preferably has a shape that intersects or bends at an acute angle in plan view. That is, it is preferable that the pressing part (low basic weight pressing part 6a1) which cross | intersected or bent at the acute angle exists in planar view in the position corresponding to the low basic weight part LB4 of the sanitary napkin 1. FIG.

  In that case, in the sanitary napkin 1 (absorbent article), the above-described squeezing part (example: low basis weight squeezing part) induces excretion fluid excreted in the sanitary napkin 1 in a desired direction, and the like. However, the crossing points and the corner points are likely to be hard, and the wearer may feel uncomfortable. Then, in the sanitary napkin 1, since the crossed part and the corner | angular part are formed in the low basic weight part LB, it can suppress that those parts become hard. Thereby, at the time of use of the sanitary napkin 1, the hardness of the location where the pressing part crossed and the corner location can be suppressed while suppressing breakage and floating of the surface sheet 2.

  In this Embodiment, as a preferable aspect, the high basic weight pressing parts 6b1-6b4, 7b1, 7b2, 8b and the low basic weight pressing parts 6a1-6a4, 7a1, 7a2, 8a are the excretory opening contact area of an absorbent article. It is preferable that they are continuously formed adjacent to each other along the longitudinal direction L on both outer sides in the width direction W of XA.

  In that case, in the sanitary napkin 1 (absorbent article), as described above, the compressed portions that continuously extend along the longitudinal direction L are formed on both outer sides in the width direction W of the excretory opening contact area XA. Therefore, when the sanitary napkin 1 is used, the excretory liquid can be diffused along the longitudinal direction L regardless of the basis weight of the absorbent body 4. At the same time, both outer sides in the width direction W of the excretory opening contact area XA can be bent and deformed along the longitudinal direction L (example: substantially W-shaped). Thereby, while suppressing the fracture | rupture and floating of the surface sheet 2, while being able to improve absorption performance, the sanitary napkin 1 can be made to fit a wearer's body.

  As another embodiment, in the absorbent body 4 of the sanitary napkin 1, the bulk of the central part in the longitudinal direction L and the width direction W is larger than the part at both ends in the longitudinal direction L and the parts on both sides in the width direction W. It may be high. That is, the absorbent body 4 has a structure in which the bulk of the central part in the longitudinal direction L and the width direction W is higher than the both end parts in the longitudinal direction L and the both sides in the width direction W, that is, a medium-high structure. Also good. However, in the absorbent body 4, only the bulk of the central portion in the longitudinal direction L may be higher than the portions at both ends of the longitudinal direction L, and only the bulk of the central portion in the width direction W is in the width direction W. It may be higher than the parts on both sides. As a method for forming such a medium-high structure, for example, a method in which the basis weight of the central portion of the absorber 4 is made higher than the basis weight of the surrounding portion, or a portion around the central portion of the absorber 4 is used. Examples thereof include a method of pressing (embossing), a method of providing a cushion sheet or another absorber in the central portion of the absorber 4, and the like. Thereby, the excretion opening | mouth contact | abutting area XA can contact | connect with an excretion opening | mouth reliably.

  Next, a method for manufacturing the sanitary napkin 1 according to the present embodiment will be described. FIG. 4 is a schematic diagram illustrating a configuration example of the manufacturing apparatus 300 for the sanitary napkin 1. The sanitary napkin 1 manufacturing apparatus 300 includes a first unit 300A, a second unit 300B, a third unit 300C, and a fourth unit 300D. The method for manufacturing the sanitary napkin 1 includes a first step to a fourth formation step. In this example, each material is formed and transported so that the longitudinal direction L of the sanitary napkin 1 is the transport direction MD. However, each material may be formed and conveyed such that the width direction W of the sanitary napkin 1 is the conveyance direction MD.

  The first step is performed by the first unit 300A. The first unit 300 </ b> A includes a fiber stacking device 110, a conveyor belt 115, a suction device 116, a coating device 301, a coating device 302, a pressing device 120, and a cutting device 130. The fiber stacking device 110 includes a material supplier 113 and a rotating drum 111 having a pattern plate 112 and including a negative pressure chamber 111N and a positive pressure chamber 111P.

  In the first step, first, the rotary drum 111 is rotated, and the piled material supplied from the material feeder 113 is accumulated in the groove communicating with the negative pressure chamber 111N of the pattern plate 112, and the piled body is placed in the groove. AB is formed. Here, the groove of the pattern plate 112 is formed with a deep groove, that is, a groove for forming a high basis weight portion HB and a shallow groove, that is, a groove for forming a low basis weight portion LB. Then, the piled material is deposited in a deep groove to form a high basis weight portion, and is deposited in a shallow groove to form a low basis weight portion. Next, when the pattern plate 112 reaches the positive pressure chamber 111P together with the stacked fiber body AB, the stacked fiber body AB is detached from the pattern plate 112. On the other hand, a continuous sheet-like upper tissue sheet UT is supplied from the roll WR1 to the transport belt 115. A hot melt adhesive is applied to one surface of the upper tissue sheet UT by a coating device 301. Then, the fiber stack AB is pressed onto one surface of the upper tissue sheet UT on the transport belt 115. Thereby, the first semi-finished product P1 in which the stacked fiber AB and the upper tissue sheet UT are stacked is formed. The first semi-finished product P1 is transported by the transport belt 115 while being sucked by the suction device 116.

  Next, a continuous sheet-like lower layer tissue sheet LT is supplied to the conveyance belt 115 from the roll WR2. A hot melt adhesive is applied to one surface of the lower tissue sheet LT by a coating device 302. One surface of the lower tissue sheet LT is pressed against the first semi-finished product P1 on the transport belt 115. Thereby, the second semi-finished product P2 in which the lower layer tissue sheet LT and the first semi-finished product P1 (stacked fiber AB and upper layer tissue sheet UT) are laminated is formed. Next, the second semi-finished product P <b> 2 is pressed by the pressing device 120 and is cut into the shape of the absorber 4 by the cutting device 130. Thereby, the third semi-finished product P3 is formed. The third semi-finished product P3 is substantially the absorbent body 4 (however, there is no high basis weight squeezed part / low basis weight squeezed part), and the laminated fiber AB is the absorbent core, and the upper layer / lower layer tissue sheet UT. -LT is a core wrap. The third semi-finished product P3 is delivered to the transport roll 141.

  Next, the second step is performed by the second unit 300B. The second unit 300B includes a transport roll 141, a transport belt 140, and a coating device 303. In the second step, the continuous sheet-like topsheet TS is supplied from the roll WR3 to the transport belt 140. A hot melt adhesive is applied to one surface of the top sheet TS by the coating device 303. The third semi-finished product P3 supplied from the transport roll 141 is pressed against one surface of the top sheet TS. Thereby, the 4th semi-finished product P4 which is a laminated body by which the 3rd semi-finished product P3 (absorber 4) and the surface sheet TS were laminated | stacked is formed. The fourth semi-finished product P4 is supplied to the pressing device 150 by the conveyor belt 140.

  Next, the third step is performed by the third unit 300C. The third unit 300 </ b> C includes a pressing device 150 having a pair of first roll 151 and second roll 152. In a 3rd process, the 4th semi-finished product P4 is squeezed by a pair of 1st roll 151 and the 2nd roll 152 of the pressing apparatus 150, and the several pressing parts 5-8 demonstrated by FIGS. 1-3 are formed simultaneously. The Thereby, the 5th semi-finished product P5 provided with the some pressing parts 5-8 is formed. At this time, by controlling the tension of the surface sheet TS, the basis weight of the surface sheet TS and the hot melt adhesive, etc., the first recess 23b is formed on the surface opposite to the compressed parts 5 to 8 in the fifth semi-finished product P5. And the 2nd recessed part 23a is formed. The fifth semi-finished product P5 is delivered to the transport roll 160. In addition, you may further provide the pressing apparatus different from the pressing apparatus 150, may form the some pressing parts 5 and 6 with the pressing apparatus 150, for example, and may form the pressing parts 7 and 8 with another pressing apparatus.

  However, the step of supplying the fourth semi-finished product P4 to the squeezing device 150 includes the surface sheet TS and the absorber 4 (third semi-finished product P3) in the squeezing device 150 (the gap between the pair of first roll 151 and second roll 152). ) And the laminated body (fourth semi-finished product P4) can be viewed as a supplying step of supplying the top sheet TS so as to face the first roll 151. Moreover, the 4th semi-finished product P4 is squeezed with a pair of 1st roll 151 and the 2nd roll 152 of the squeezing apparatus 150, and the process of forming the several pressing parts 5-8 is in the position corresponding to the high basic weight part HB. It can be seen as a forming step of forming the first high-pressure portion 21b and the first low-pressure portion 22b and forming the second high-pressure portion 21a and the second low-pressure portion 22a at positions corresponding to the low basis weight portions LB. .

  Here, the pressing device 150 will be described. The pair of first rolls 151 and second rolls 152 of the pressing device 150 are rolls that face each other and rotate in opposite directions. The rotation direction of the first roll 151 is S1, and the rotation direction of the second roll 152 is S2. The 1st roll 151 is provided with the convex part arrange | positioned at the outer peripheral surface. The second roll 152 has a smooth outer peripheral surface. The pressing device 150 squeezes a plurality of fourth semi-finished products P4, which is a laminate of the third semi-finished product P3 (absorbent body 4) and the top sheet TS, supplied between the first roll 151 and the second roll 152. Parts 5 to 8 are formed. This will be further described below.

  5-6 is a figure which shows the structural example of the convex part 31 of the 1st roll 151 of the pressing apparatus 150. FIG. However, FIG. 5 is a diagram illustrating a configuration example in which the pattern of the convex portion 31 of the first roll 151 is developed in a planar shape. FIG. 6A is a cross-sectional view of the convex portion 31 taken along line VIa-VIa in FIG. FIG. 6B is a cross-sectional view of the protrusion 31 along the line VIb-VIb in FIG. FIG. 6C is a partial side view of the convex portion 31 viewed from the VIa-VIa line direction. FIG. 6B is a partial side view of the protrusion 31 as viewed from the line VIb-VIb.

  As shown in FIG. 5, on the outer peripheral surface of the first roll 151, as the convex portion 31, a convex convex portion 35, a pair of convex portions 37 and 37, and a pair of convex portions erected substantially perpendicularly from the outer peripheral surface. The parts 38 and 38 and the convex part 36 are formed. The convex part 35, the pair of convex parts 37, 37, the pair of convex parts 38, 38, and the convex part 36 are respectively a compressed part 5, a pair of compressed parts 7, 7, a pair of compressed parts 8, 8, and a compressed part. 6 and has a shape corresponding to 6 and is disposed at a position corresponding to the compressed portion on the outer peripheral surface of the first roll 151 in order to form the compressed portion. Therefore, the shape of each convex portion viewed from the radial direction of the first roll 151 is substantially the same as the shape of the corresponding compressed portion in plan view. In this Embodiment, the convex parts 35-38 are arrange | positioned at an outer peripheral surface so that the direction which goes to the convex part 36 from the convex part 35 may turn into the direction along the peripheral surface direction (rotation direction S1) of the 1st roll 151. ing. However, the convex portions 35 to 38 may be arranged on the outer peripheral surface so that the direction from the convex portion 35 toward the convex portion 36 is a direction along a direction perpendicular to the peripheral surface direction.

  The convex part 35 is a convex part for the pressing part 5. The convex part 35 is provided with the high basic weight convex part 35b for forming the high basic weight pressing part 5b, ie, for pressing the high basic weight part HB. In the present embodiment, the convex portion 35 has a closed curved shape such as a heart shape corresponding to the shape of the compressed portion 5. The pair of convex portions 37 and 37 are convex portions for the pair of pressing portions 7 and 7. Each of the pair of convex portions 37, 37 has a high basis weight convex portion 37b1, 37b2 for forming the high basis weight squeezed portion 7b1, 7b2, that is, for squeezing the high basis weight portion HB, and a low basis weight. Low basis weight convex portions 37a1 and 37a2 for forming the pressing portions 7a1 and 7a2, that is, for pressing the low basis weight portion LB are provided. In each convex part 37, the low basic weight convex part 37a1, the high basic weight convex part 37b1, the low basic weight convex part 37a2, and the high basic weight convex part 37b2 are in the direction from the convex part 35 toward the convex part 36. , In this order. In this Embodiment, each convex part 37 has a curvilinear shape like a gentle corrugation corresponding to the shape of each pressing part 7, and a pair of each convex part 37 and 37 is the width direction in a convex pattern. The line is symmetrical with respect to a center line extending in the longitudinal direction through the center. The pair of convex portions 38, 38 are convex portions for the pair of pressing portions 8, 8. Each of the pair of convex portions 38, 38 has a high basis weight convex portion 38b for forming the high basis weight compressed portion 8b, that is, a high basic weight compressed portion HB, and a low basis weight compressed portion 8a. A low basis weight convex portion 38a for forming, that is, for squeezing the low basis weight portion LB is provided. In each convex part 38, the low basic weight convex part 38a and the high basic weight convex part 38b are arranged in this order in the direction from the convex part 35 toward the convex part 36. In the present embodiment, each convex portion 38 has a gently corrugated curved shape corresponding to the shape of each compressed portion 8, and the pair of convex portions 38, 38 are in the width direction of the convex pattern. The line is symmetrical with respect to a center line extending in the longitudinal direction through the center. The convex part 36 is a convex part for the pressing part 6. The convex portion 36 is a high basis weight convex portion 36b1, 36b2, 36b3, and 36b4 for forming the high basis weight compressed portion 6b1, 6b2, 6b3, 6b4, that is, for pressing the high basis weight portion HB. Low basis weight convex portions 36a1, 36a2, 36a3, and 36a4 for forming the low basis weight pressing portions 6a1, 6a2, 6a3, 6a4, that is, for pressing the low basis weight portion LB are provided. In the convex portion 36, a low basis weight convex portion 36a1, a high basic weight convex portion 36b1, a low basic weight convex portion 36a2, a high basic weight convex portion 36b2, a low basic weight convex portion 36a3, and a high basic weight convex portion. The portion 36b3, the low basis weight convex portion 36a4, and the high basis weight convex portion 36b4 are arranged in this order. In the present embodiment, the convex portion 36 has a closed curved shape like a heart shape corresponding to the shape of the compressed portion 6.

  Each low basic weight convex part contains the 2nd high pressure pressing convex part and the 2nd low pressure pressing convex part adjacent to the 2nd high pressure pressing convex part. In the present embodiment, each of the low basis weight convex portions 37a1, 37a2, 38a, 36a1, 36a2, 36a3, and 36a4 includes a second high pressure squeezed convex portion 41a and a second high pressure squeezed portion 41a. 2 includes a second high-pressure squeezed portion 42a that is adjacent to the high-pressure squeezed convex portion 41a and forms a second low-pressure squeezed portion 22a. For example, the low basis weight convex part 36a3 of the convex part 36 shown in FIG. 6A as a representative of the low basic weight convex part is erected on the outer peripheral surface (indicated by the base line in the figure) of the first roll 151. The second low-pressure squeezing convex part 42a and the second high-pressure squeezing convex part 41a erected on the upper surface of the second low-pressure squeezing convex part 42a are included. In the present embodiment, the second low pressure squeezed convex portion 42a has a wall shape in which both side surfaces are perpendicular to the outer peripheral surface, and the upper surface is inclined in a tapered shape with respect to both side surfaces. The 2nd high pressure pressing convex part 41a is frustum shape (illustration: frustum). In this case, the height of the second low-pressure pressing convex portion 42a (the top surface thereof), that is, the height from the outer peripheral surface of the first roll 151 (indicated by the base line in the figure) is Ha2, and the second high-pressure pressing convex portion The height of the portion 41a (the top surface thereof), that is, the height from the outer peripheral surface of the first roll 151 (indicated by the base line in the figure) is Ha1. That is, Ha1> Ha2. Therefore, when forming a pressing part, the 2nd high pressure pressing convex part 41a can press the absorber 4 deeper than the 2nd low pressure pressing convex part 42a. Here, the height Ha2 of the second low-pressing convex portion 42a is, for example, 1.8 to 5.6 mm. As for width da2 of the convex part 42a for 2nd low pressing, 1-5 mm is mentioned, for example. As for height Ha1 of the convex part 41a for 2nd high pressing, 2-6 mm is mentioned, for example. As for width da1 of the convex part 41a for 2nd high pressing, 0.5-4 mm is mentioned, for example. The difference ΔHa between the height Ha2 and the height Ha1 is, for example, 0.1 to 0.4 mm.

  Each high basis weight convex portion includes a first high-pressure squeezed convex portion and a first low-pressure squeezed convex portion adjacent to the first high-pressure squeezed convex portion. In the present embodiment, each of the high basis weight convex portions 35b, 37b1, 37b2, 38b, 36b1, 36b2, 36b3, and 36b4 includes a first high pressure squeezed portion 41b that forms the first high pressure squeezed portion 21b. The first low-pressure squeezing portion 42b is adjacent to the first high-pressure squeezing convex portion 41b and forms the first low-pressure squeezing portion 22b. For example, the high basis weight convex part 36b3 of the convex part 36 shown in FIG. 6B as a representative of the high basic weight convex part is erected on the outer peripheral surface (indicated by the base line in the figure) of the first roll 151. The first low-pressure squeezing convex part 42b and the first high-pressure squeezing convex part 41b erected on the upper surface of the first low-pressure squeezing convex part 42b are included. In the present embodiment, the first low pressure squeezed convex portion 42b has a wall shape in which both side surfaces are perpendicular to the outer peripheral surface, and the upper surface is inclined in a tapered shape with respect to both side surfaces. The first high pressure squeezed convex portion 41b has a frustum shape (example: truncated cone). In this case, the height of the first low-pressure pressing convex portion 42b (the top surface thereof), that is, the height from the outer peripheral surface of the first roll 151 (indicated by the base line in the figure) is Hb2, and the first high-pressure pressing convex portion The height of the portion 41b (the top surface thereof), that is, the height from the outer peripheral surface of the first roll 151 (indicated by the base line in the figure) is Hb1. That is, Hb1> Hb2. Therefore, when forming a pressing part, the 1st high pressure pressing convex part 41b can press the absorber 4 deeper than the 1st low pressure pressing convex part 42b. As for the height Hb2 of the convex part 42b for 1st low pressing, 1.7-5.4 mm is mentioned, for example. As for width db2 of the convex part 42b for 1st low pressing, 1-5 mm is mentioned, for example. As for the height Hb1 of the convex part 41b for 1st high pressing, 2-6 mm is mentioned, for example. As for width db1 of the convex part 41b for 1st high pressing, 0.5-4 mm is mentioned, for example. The difference ΔHb between the height Hb2 and the height Hb1 is, for example, 0.2 to 0.6 mm.

  Here, in the present embodiment, the height Ha2 of the second low-pressure squeezing convex portion 42a is equal to the height Hb1 of the first high-pressure squeezing convex portion 41b and the height Hb2 of the first low-pressure squeezing convex portion 42b. The size between. The difference ΔHa between the height Ha1 of the second high-pressure squeezing portion 41a and the height Ha2 of the second low-pressure squeezing convex portion 42a is equal to the height Hb1 of the first high-pressure squeezing convex portion 41b. It is smaller than the difference ΔHb from the height Hb2 of the convex portion 42b for use. That is, ΔHa <ΔHb. Here, (ΔHb−ΔHa) is, for example, 0.1 to 0.5 mm.

  Thereby, in the 4th semi-finished product P4, ie, the laminated body of the 3rd semi-finished product P3 (absorber 4), and the surface sheet TS, from the non-skin side surface of the absorber 4 in the bottom part 21aBT of the 2nd high pressing part 21a. The difference ΔUa between the height Ua1 and the height Ua2 from the non-skin-side surface of the absorbent body 4 at the bottom 22aBT of the second low-compressed part 22a is defined as the non-absorption of the absorber 4 at the bottom 21bBT of the first high-compressed part 21b. It can be made smaller than the difference ΔUb between the height Ub1 from the skin side surface and the height Ub2 from the non-skin side surface of the absorbent body 4 at the bottom 22bBT of the first low pressing portion 22b. That is, ΔUa <ΔUb.

  In this Embodiment, as shown in FIG.6 (c), in each low basic weight convex part, the 2nd high pressure pressing convex part 41a and the 2nd low pressure pressing convex part 42a are convexes for low basic weight. The parts are arranged alternately and continuously in the extending direction. Similarly, as shown in FIG. 6 (d), in each high basis weight convex portion, the first high pressure squeezing convex portion 41b and the first low pressure squeezing convex portion 42b are extended, and the high basis weight convex portion is extended. They are arranged alternately and continuously in the existing direction.

  Next, referring to FIG. 4 again, the fourth step is performed by the fourth unit 300D. The fourth unit 300D includes a transport roll 160, a transport roll 161, a coating device 304, and a surrounding cutting device 170. In the fourth step, the continuous sheet-like back sheet BS is supplied from the roll WR4 to the transport roll 161. A hot melt adhesive is applied to one surface of the back sheet BS by a coating device 304. The back sheet BS supplied from the transport roll 161 is pressed onto the one surface of the fifth semi-finished product P5 on the transport roll 160. Thereby, a sixth semi-finished product P6 in which the fifth semi-finished product P5 and the back sheet BS are laminated is formed. Subsequently, the sixth semi-finished product P6 is cut into the shape of the sanitary napkin 1 by cutting the peripheral portion by the peripheral cutting device 170. Thereby, the seventh semi-finished product P7 is formed. The seventh semi-finished product P7 is substantially the sanitary napkin 1 (FIG. 1).

  The sanitary napkin 1 is manufactured as described above.

  In addition, each low basic weight part mentioned above, each convex part (each high basic weight convex part and each low basic weight convex part, each 1st high pressure pressing convex part, each 2nd high pressing weight convex part, each 1st The number, position, and shape of 1 low-pressure squeezing convex portion and each second low-pressure squeezing convex portion are examples, and the present invention is not limited to the examples.

  In addition, for the convenience of production, considering the case where the conveyance timing of the absorbent body 4 and the compression timing for forming the compressed portions 5 to 8 are slightly shifted, the low basic weight convex portion and the high basic weight convex portion are It may be formed. For example, when the low basis weight portion LB is almost certainly squeezed with the low basis weight convex portion, the length in the extending direction of the low basic weight portion LB is longer than the length of the low basic weight portion LB. And when pressing is performed with good timing, you may make it the length that a low basic weight pressing part protrudes little by little to the high basic weight part HB of the both sides of the low basic weight part LB. In this case, whether the timing is early or late, the low basis weight portion LB can be almost certainly squeezed by the low basis weight convex portion. Or, for example, when only one of the case where the timing is advanced and the case where it is delayed occurs, the length in the extending direction of the low basis weight convex portion is longer than the length of the low basis weight portion LB, and When the pressing is performed with good timing, the length should be such that the low basis weight pressing part protrudes slightly from the high basis weight part HB on one side of the low basis weight part LB (selected by the ease of timing shift). May be. In this case, even when the timing is shifted, the low basis weight portion LB can be almost surely squeezed by the low basis weight convex portion. Alternatively, for example, when the high basis weight HB is almost certainly squeezed by the high basis weight convex portion, the length in the direction in which the high basis weight convex portion extends is longer than the length of the high basis weight portion LB. However, the length may be such that the high basis weight squeezed portion protrudes little by little to the low basis weight portions LB on both sides of the high basis weight portion HB when squeezing is performed with good timing. In this case, whether the timing is early or late, the high basis weight portion HB can be squeezed almost certainly with the high basis weight convex portion. In these cases, in the vicinity of the boundary between the low basis weight part LB and the high basis weight part HB, a high basis weight squeezed part is formed in the low basis weight part LB, or a low basis weight is provided in the high basis weight part HB. A pressing part may be formed. Then, the high basis weight portion HB has a low basis weight pressing portion and the absorbent body 4 becomes hard, or the low basis weight portion LB has a high basis weight pressing portion and the topsheet 2 is an absorbent body. Floating from 4 can be considered. However, in a part near the boundary, even if a high basis weight squeezed part is formed in the low basis weight part LB or a low basis weight squeezed part is formed in the high basis weight part HB, each basis weight is adjacent to it. Since the pressing part optimal for the amount is provided and connected, it is possible to prevent the situation where the absorbent body 4 becomes hard or the topsheet 2 floats from the absorbent body 4 and has the same effect as when there is no deviation. Can play.

  In the above-described embodiment, in the fourth semi-finished product P4 that is a laminate of the third semi-finished product P3 (absorber 4) and the top sheet TS, the degree of pressing by the second high-pressure pressing convex portion 41a and the second level It can be said that the difference between the degree of pressing by the low pressure squeezing convex part 42a is smaller than the difference between the degree of pressing by the first high pressure squeezing convex part 41b and the degree of pressing by the first low pressure squeezing convex part 42b.

  In this manufacturing method, the 2nd high pressing part 21a and the 2nd low pressing part 22a are formed by the 2nd high pressing part 41a and the 2nd low pressing part 42a of the low basic weight convex part, and high basic weight The first high pressing portion 21b and the first low pressing portion 22b are formed by the first high pressing convex portion 41b and the first low pressing convex portion 42b. The difference between the degree of pressing by the second high-pressure pressing convex portion 41a in the low basis weight part LB and the level of pressing by the second low-pressure pressing convex part 42a is the first high pressure pressing convex in the high basis weight part HB. It is made smaller than the difference between the degree of pressing by the portion 41b and the degree of pressing by the first low pressure convex portion 42b. That is, in the low basis weight part LB, while relatively reducing the difference between the degree of pressing in the second high pressing part 21a and the degree of pressing in the second low pressing part 22a, in the high basis weight part HB, The difference between the degree of squeezing in the first high-pressure squeezing part 21b and the degree of squeezing in the first low-pressure squeezing part 22b is relatively increased. Thereby, in the high basic weight part HB, the degree of pressing of the 1st high pressure pressing part 21b becomes relatively large, and the degree of pressing of the 1st low pressing part 22b becomes relatively small. Therefore, the convex part 41b for 1st high pressing can fully squeeze the absorber 4 (high basic weight part HB), and can suppress that the surface sheet 2 peels off from bottom 21bBT of the 1st high pressing part 21b, and floats. On the other hand, in the low basic weight part LB, the degree of pressing of the second high-pressure squeezed part 21a is relatively small, and the degree of pressing of the second low-pressure squeezed part 22a is relatively large. Therefore, it is possible to relatively suppress the difference between the degree to which the top sheet 2 is pressed by the second low pressing convex part 42a and the level to which the top sheet 2 is pressed by the second high pressing convex part 41a. Therefore, it can suppress that the surface sheet 2 fractures | ruptures or it floats from the absorber 4 (low basic weight part LB) by a fracture | rupture. Thereby, the first high-pressure squeezed part 21b, the second high-pressure squeezed part 21a, the first low-pressure squeezed part 22b, and the second low-pressure squeezed part 22a may make it easy to perform actions such as damming, diffusing, and absorbing excretory liquid. it can. Thus, in the manufacturing method of an absorbent article provided with the absorber 4 which has the high basic weight part HB, and the low basic weight part LB, and the surface sheet 2, the surface sheet 2 and the absorber 4 are squeezed and compressed. When forming the parts 5-8, it becomes possible to suppress that the topsheet 2 floats from the absorber 4 or breaks.

<Height>
The measurement of the height from the skin side surface of the back sheet of the bottom part of the pressing part was measured by the following method. (1) The absorbent article was cut into a size of 25 mm × 25 mm around the measurement target portion, and used as a sample. (2) Using a laser displacement meter (manufactured by Keyence Corporation: KS-1100), measurement was performed by the following non-contact method. That is, the sample was placed on a horizontal measuring table with the back sheet facing down, and the displacement from the measuring table was measured with a laser displacement meter at five different sites (the bottom of the pressing groove. (3) Five measurements The average value was defined as the height of the bottom of the compressed part (including the thickness of the back sheet) (4) If necessary, the thickness of the back sheet was subtracted from the height (including the thickness of the back sheet). When the bottoms of the first and second low-pressure parts are inclined with respect to the horizontal plane, the side walls and the first of the first and second low-pressure parts are The height at the position where the bottom of the second low-pressure squeezed intersects with the height of the bottom of the first and second low-pressure squeezed parts, although the thickness of the back sheet was performed by the following method. The sample was cut so as to cross the section, and a digital microscope (manufactured by Keyence Corporation: VHX-2000) Thus, an enlarged image was taken from a direction perpendicular to the cut surface of the sample and measured from the enlarged image.

<Floating or peeling of surface sheet>
The measurement of the float or peeling of the surface sheet was performed by the following method. (1) The height of the surface sheet was measured by the above <height> measurement, and a location deviating from the original shape (FIG. 1) was specified. (2) About the location, the visual inspection was performed and it was determined whether the float or peeling had arisen.

<Sheet weight of sheet>
The basis weight of each sheet (including the absorber) was measured by the following method. (1) A 50 mm × 50 mm portion was cut out from the sheet and used as a sample. (2) The sample was dried in an air atmosphere of 100 ° C. or higher. (3) The mass of the sample was measured. (4) The basis weight of the sample was calculated by dividing the measured mass value by the area of the sample. (5) The value obtained by averaging the basis weights of 10 samples was taken as the basis weight of the sheet.

<Sheet thickness>
The thickness of each sheet (including the absorber) was measured by the following method. (1) A 50 mm × 50 mm portion was cut out from the sheet and used as a sample. (2) The sample was dried in an air atmosphere of 100 ° C. or higher. (3) The thickness of the sheet was measured under the condition of a measurement load of 3 g / cm ² using a thickness meter (manufactured by Daiei Chemical Seiki Seisakusho: Model FS-60DS) equipped with a 15 cm ² probe. (4) The thickness of three places was measured with one sample, and the average value of the thicknesses of the three places was taken as the sheet thickness.

  Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. However, the present invention is not limited to such examples.

(1) Sample A sanitary napkin shown in FIGS. 1 to 2 was prepared as a sample of the example. That is, the first roll has a difference (0.2 mm) between the height of the second high-pressure squeezing convex portion and the height of the second high-pressure squeezing convex portion and the height of the first high-pressure squeezing convex portion. A sanitary napkin was produced with a production apparatus having a structure smaller than the difference (0.3 mm) from the height of the convex part for use. Moreover, as a sample of the comparative example, the difference (0.3 mm) between the height of the second high-pressure squeezing convex portion and the height of the second high-pressure squeezing convex portion is the same as the height of the first high-pressure squeezing convex portion. A sanitary napkin was produced with a production apparatus having the same structure as the difference (0.3 mm) from the height of the convex part for pressing.

(2) Evaluation method of pressing part After measuring the difference of the height of the bottom part of the high pressing part and the bottom part of the low pressing part in each of the low basic weight part and the high basic weight part, the sample of an Example and a comparative example A test simulating the use was performed, and the relationship between the difference after the test and the float or peeling of the surface sheet was examined.
However, a test simulating use was conducted by the following method. The low basis weight part LB4 in the sample is folded (example: mountain fold) at a predetermined angle (example: 90 °) at a broken line passing through the low basis weight squeezed parts 6a1, 6a3, and then the original is not folded. The deformation and restoration of returning were repeated a predetermined number of times (example: 10 times). And it was tested whether a surface sheet floats or peels off.

(3) Evaluation Results In the sanitary napkin of the example, the difference (586 μm) between the height of the bottom of the second high-pressure portion and the height of the bottom of the second low-pressure portion is the height of the bottom of the first high-pressure portion. It was smaller than the difference (787 micrometers) with the height of the bottom part of a 1st low pressing part. On the other hand, in the sanitary napkin of the comparative example, the difference (1579 μm) between the height of the bottom of the second high-pressure portion and the height of the bottom of the second low-pressure portion is the same as the height of the bottom of the first high-pressure portion and the first low. It was larger than the difference (748 μm) from the height of the bottom of the pressing part. And after the test which imitated use, in the sanitary napkin of the comparative example, the surface sheet floated in the vicinity of the low basis weight squeezed portion 6a1, but in the sanitary napkin of the example, the low basis weight squeezed portion 6a1, The surface sheet was not lifted around 6a3.

  The absorbent article of the present invention is not limited to the above-described embodiment, and the embodiments can be combined or changed without departing from the object and spirit of the present invention.

1 Sanitary napkin (absorbent article)
2 Top sheet 4 Absorber 5-8 Squeezing part 21a 2nd high pressing part 21b 1st high pressing part 22a 2nd low pressing part 22b 1st low pressing part 21aBT, 22aBT, 21bBT, 22bBT Bottom part Ha1, Ha2, Hb1, Hb2 Height ΔHa, ΔHb
HB High basis weight LB Low basis weight

Claims (7)

An absorber having a high basis weight part and a low basis weight part, a top sheet laminated on the absorbent body, and a back sheet positioned on the opposite side of the top sheet of the absorber, from the top sheet side to the top sheet An absorbent article having a squeezed portion that is recessed toward the absorber side,
The pressing part is
A high basis weight pressing portion formed at a position corresponding to the high basis weight portion;
A low basis weight squeezed part formed at a position corresponding to the low basis weight part,
The high basis weight pressing part is:
A first high pressure section;
Including a first low pressure portion adjacent to the first high pressure portion and recessed more shallowly than the first high pressure portion;
The low basis weight pressing part is:
A second high pressure section;
Including a second low-pressure squeezed part adjacent to the second high-pressure squeezed part and shallower than the second high-pressure squeezed part,
The difference between the height of the bottom of the second high-pressure portion from the back sheet and the height of the bottom of the second low-pressure portion from the back sheet is from the back sheet of the bottom of the first high-pressure portion. Smaller than the difference between the height and the height from the back sheet of the bottom of the first low-pressure part,
Absorbent article. In the non-skin side of the high basis weight squeezed part, the absorbent body has a first recess formed by recessing the non-skin side surface toward the skin side, and the non-skin side of the low basis weight squeezed part. The non-skin side surface has a second recess formed to be depressed toward the skin side,
The distance between the bottom portion of the first high-pressure portion and the bottom portion of the first recess facing the bottom portion of the first high-pressure portion is the bottom portion of the second high-pressure portion and the bottom portion of the second high-pressure portion. Is the same as the distance to the bottom of the second recess facing the
The absorbent article according to claim 1. The high basis weight squeezing part and the low basis weight squeezing part are formed continuously adjacent to each other along the longitudinal direction on both outer sides in the width direction of the excretion opening contact area of the absorbent article. Yes,
The absorbent article according to claim 1 or 2. The high basis weight pressing portion and the low basis weight pressing portion are formed adjacent to each other continuously,
The difference between the height from the back sheet of the bottom of the first low-pressure portion and the height from the back sheet of the bottom of the second low-pressure portion is from the back sheet of the bottom of the second high-pressure portion. Smaller than the difference between the height and the height from the back sheet of the bottom of the second low-pressure part,
The absorbent article as described in any one of Claims 1 thru | or 3. The difference between the height from the back sheet of the bottom of the second low pressing portion and the height from the back sheet of the bottom of the second high pressing portion is from the back sheet of the bottom of the first low pressing portion. 30% or more and 80% or less of the difference between the height and the height of the bottom of the first high-pressure portion from the back sheet,
The absorbent article as described in any one of Claims 1 thru | or 4. The difference between the height from the back sheet of the bottom portion of the first low-pressure portion and the height from the back sheet of the bottom portion of the first high-pressure portion is from the back sheet of the bottom portion of the first low-pressure portion. 20% or more and 100% or less of the height,
The difference between the height of the bottom of the second low pressing portion from the back sheet and the height of the bottom of the second high pressing portion from the back sheet is from the back sheet of the bottom of the second low pressing portion. 10% or more and 100% or less of the height,
The absorbent article as described in any one of Claims 1 thru | or 5. The low basis weight squeezed part has a shape that intersects or bends at an acute angle in plan view.
The absorbent article as described in any one of Claims 1 thru | or 6.

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