KR101831753B1 - Absorbent article - Google Patents

Abstract

The absorbent article according to the present invention comprises an absorbent body 2 for absorbing a liquid, a topsheet 3 covering the absorbent body 2 from one side in the thickness direction of the absorbent body 2, The topsheet 3 has a back folded back folded portion 32 on both sides in the width direction and has a leading end portion 320 of the folded back portion 32, Are bonded to the back sheet 5 by a pair of fourth bonding portions 14 arranged in the width direction between the absorbent body 2 and the back sheet 5 in the thickness direction, The pair of fourth junctions 14b and 14c in the rear region 1c are located on the outer side in the width direction with respect to the pair of fourth junctions 14a in the central region 1a.

Description

Absorbent article

The present invention relates to an absorbent article.

Conventionally, a sanitary pad is known as an absorbent article. For example, Patent Document 1 discloses a liquid-permeable surface material which is in contact with the skin and permeates body fluids such as menstrual blood, a barrier material (leakproof material) which is in contact with the panties to prevent leakage of body fluids, And a liquid-holding absorbent interposed between the through-holes.

In this physiological pad, the surface material directly covers the skin contact side and the side surface of the absorber, and is fixed to each of the absorber and the barrier material through the fixing agent on the non-skin contact surface side. That is, the absorber is covered with the skin contact surface side and the side surface side by the surface material, and the non-skin contact surface side is covered by the barrier material.

Japanese Patent Application Laid-Open No. 7-184957

In the device disclosed in Patent Document 1, when a force in the width direction is applied from both legs of the wearer at the time of wearing, the absorbent body is pressed and crushed, and the legs are directly received from the absorbent body which is stiffer than the surface material. As a result, the user feels a sense of incongruity in the horseshoe, and there is a possibility that the mounting performance is deteriorated. In addition, when a force in the width direction is applied from the legs, since the sanitary pad is pushed in the width direction, the shape of the skin-side surface that absorbs liquid such as body fluids may be deformed and leakage may occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide an absorbent article capable of suppressing uncomfortable feeling in the hosiery to improve the attachment property and to suppress leakage of the liquid.

The main object of the present invention is to provide an absorbent body having a longitudinal direction, a width direction and a thickness direction, absorbing liquid, a top sheet covering the absorbent body from one side in the thickness direction of the absorbent body, And a back sheet provided on the other side of the absorbent body in the thickness direction, wherein the top sheet is provided on both sides in the width direction, Folded back portion is positioned between the absorbent body and the back sheet in the thickness direction, and at least in the central region in the longitudinal direction, the front end of the folded back portion is located between the absorbent body and the back sheet, And both end portions are located between the absorbent body and the top sheet in the width direction A water-based product. Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

According to the present invention, it is possible to suppress the uncomfortable feeling of the hull, thereby improving the fitting performance and suppressing the leakage of the liquid.

1 is a schematic plan view of a pad according to an embodiment of the present invention, viewed from the skin side in the thickness direction.
2 is a schematic plan view of the pad viewed from the non-skin side in the thickness direction.
FIG. 3A is a sectional view taken along line IIIA-IIIA of FIG. 1, and FIG. 3B is a sectional view taken along line IIIB-IIIB of FIG.
4 is a schematic plan view showing the positional relationship of the fourth center joint, the fourth front joint, and the fourth rear joint;

At least the following will become apparent from the description of the present specification and the accompanying drawings.

A top sheet covering the absorbent body from one side in the thickness direction of the absorbent body and a back sheet provided on the other side in the thickness direction of the absorbent body, the absorbent body having a longitudinal direction, a width direction and a thickness direction, Wherein the topsheet has folded back folded portions on both sides in the width direction and the tip ends of the folded back portions are folded in the thickness direction between the absorbent body and the back sheet, Wherein said pair of said joints in said front region and said rear region in said longitudinal direction are joined to said back sheet by a pair of joining portions parallel to each other in the longitudinal direction, The absorbent article located on the outer side in the width direction with respect to the joining portion becomes clear.

In this way, in the central region where the legs are in close contact with each other, since the pair of joint portions are located on the inner side in the width direction of the pair of joint portions in the front region and the rear region, It is possible to secure a large area in the region where the legs are attached, and it is possible to alleviate contact pressure of the legs from the absorber. Therefore, the feeling of discomfort in the gauze is suppressed, and the attachment property of the absorbent article is improved. On the other hand, in the front region and the rear region, since the pair of bonding portions are positioned outside the pair of bonding portions in the central region in the width direction, the plane shape of the skin-side surface for absorbing the liquid can be further secured, Leakage can be suppressed.

As such an absorbent article, it is preferable that at least a part of the position of the pair of the joints in the front region and the rear region and the position of the pair of the joints in the central region overlap in the longitudinal direction.

As a result, since the positions of the pair of joining portions of the front region and the rear region and the positions of the pair of joining portions of the central region are overlapped in the longitudinal direction on the central region side where the legs are frequently in contact with each other, Even when a force in the width direction is applied from both legs at the time of wearing, the joining between the top sheet and the back sheet becomes difficult to be deteriorated.

As such an absorbent article, it is preferable that the absorbent body has an absorbent core having a constricted portion narrowed inward in the width direction at least in the central region.

As a result, the distance in the width direction from the folded back portion of the topsheet to the absorbent core becomes long in the central region, and after the legs are pressed against the folded back portion of the topsheet and both ends of the second sheet, It is possible to reduce the contact pressure from the absorbent core to which both legs are subjected.

Wherein an inner end of at least one of said pair of said joining portions of said front region and said rear region has an inner diameter that is larger than a constriction starting position of said constriction portion or a constriction starting position of said constriction portion It is preferable that it is disposed on the inner side.

As a result, since the inner end of at least one of the pair of joining portions of the front region and the rear region is located in the region where the constricted portion is provided, Even when a force in the width direction is applied, the joining between the top sheet and the back sheet is less likely to be deteriorated.

In the absorbent article, it is preferable that the back sheet has a side sheet which is formed so as to protrude outward beyond the folded portion of the top sheet in the width direction.

As a result, since the extended portion of the side sheet forming the wing portion (a part of the back sheet) is not bonded to the top sheet, when the extended portion is folded toward the non-skin side in the thickness direction and is attached to the undergarment, A situation in which the topsheet is pulled by the back sheet is avoided, thereby suppressing discomfort in the waist when the absorbent article is worn.

The absorptive article may further include a second sheet between the absorbent body and the top sheet in the thickness direction and at least the both end portions in the width direction of the second sheet in the central region in the longitudinal direction, And is preferably located between the absorbent body and the top sheet in the width direction.

As a result, both ends of the secondary sheet are positioned between the absorbent body and the top sheet in the width direction in the central region in the longitudinal direction where the legs are frequently in contact with each other. Therefore, It is possible to receive the contact pressure from the folded back portion of the soft top sheet and the both end portions of the secondary sheet before the absorbent body, and it is not necessary to directly receive the contact pressure from the absorbent body. Therefore, it is possible to relax the contact pressure from the absorber to which the legs are subjected, thereby restraining discomfort in the girth and leading to an improvement in the mountability of the absorbent article.

The absorbent core having an absorbent core having at least a constricted portion constricted inward in the width direction at least in the central region, the absorbent core having a widthwise end in the width direction and an absorbent core It is preferable that a clearance is provided between them.

As a result, the absorbent article has a region in which the top sheet and the second sheet exist, and a region in which only the top sheet exists in the thickness direction. When a force in the width direction is applied from both legs, deformation occurs in a region where only the top sheet having lower rigidity is present than the region where the top sheet and the second sheet exist, and the region in which the top sheet and the second sheet exist exists in the thickness direction It becomes easy to stand up. Therefore, since the contact pressure can be received from the entire surface of the workpiece, the contact pressure from the top sheet and the second sheet, which are subjected to both legs, is relaxed, and the uncomfortable feeling in the joints is further suppressed.

As such an absorbent article, it is preferable that the both end portions of the secondary sheet have a folded back region.

As a result, since the legs can receive the contact pressure from the folded back region having a wider surface than the both end faces of the secondary sheet, the unevenness of the legs can be further improved .

 As such an absorbent article, it is preferable that the joining portion joining the top sheet and the second sheet in the thickness direction is located inward in the width direction with respect to the both end portions of the second sheet.

As a result, since the top sheet and the second sheet are not bonded to each other in the thickness direction at the folded back portion of the top sheet and the both end portions of the second sheet, the degrees of freedom of the fibers are increased, And the discomfort feeling of the horses is further suppressed.

Wherein the absorbent core has an absorbent core having at least a constricted portion narrowed inward in the width direction at least in the central region, wherein the top sheet and the second sheet are bonded to each other at both sides in the width direction by a crimping portion And the crimping portion is located at least at an outer side in the width direction of the constriction at the narrowest position of the constricting portion.

As a result, the stiffness of the top sheet and the secondary sheet is increased at the position where the pressing portion is provided. Therefore, when the two legs apply force in the width direction to the absorbent article, the folded back portion of the top sheet, So that both ends of the elastic member can easily rise or fall in the thickness direction. Therefore, since the legs can receive contact pressure from the entire surface or the entire lower surface in the thickness direction, the contact pressure from the top sheet and the secondary sheet, which are subjected to both legs, is relaxed, and the discomfort feeling in the legs is further suppressed.

=== Embodiment ===

As an example of the absorbent article related to the embodiment of the present invention, the sanitary pad 1 (hereinafter referred to simply as the pad 1) will be described. The absorbent article includes a so-called fabric sheet, such as a panty liner, and is not limited to a sanitary pad.

≪ Configuration of Pad (1)

The configuration of the pad 1 will be described with reference to Figs. 1, 2, 3A, and 3B.

1 is a schematic plan view of a pad 1 according to an embodiment of the present invention viewed from the skin side in the thickness direction. 2 is a schematic plan view of the pad 1 viewed from the non-skin side in the thickness direction. Fig. 3A is a sectional view taken along the line IIIA-IIIA in Fig. 1, and Fig. 3B is a sectional view taken along line IIIB-IIIB in Fig.

The pad 1 is a sheet-like member having a long shape in plan view and has a longitudinal direction, a width direction and a thickness direction. Refers to the longitudinal direction of the product of the pad 1 and the term "thickness direction" refers to the thickness direction of the product of the pad 1 and the term "width direction" And a shorter direction orthogonal to the thickness direction. In the longitudinal direction, the direction of the user's biceps (front side) is "forward" and the direction of the back side of the user is "backward" when the pad 1 is used. The thickness direction has a " skin side " and a " non-skin side " on the side opposite to the user's skin when the pad 1 is used.

3A and 3B, the pad 1 includes an absorbent body 2, a topsheet 3 covering the absorbent body 2 from the skin side which is one side in the thickness direction of the absorbent body 2, A second sheet 4 provided between the absorbent body 2 and the top sheet 3 in the absorbent body 2 and a back sheet 5 provided on the non-skin side on the other side in the thickness direction of the absorbent body 2. [ In the present embodiment, the backsheet 5 has two types of sheets, a main sheet 51 and a side sheet 52. [

The topsheet 3 and the secondary sheet 4, the absorbent body 2 and the secondary sheet 4, the absorbent body 2 and the topsheet 3, the topsheet 3 and the backsheet 5, The main sheet 51 and the side sheet 52 in the sheet 5 are bonded together by an adhesive such as a hot melt adhesive. Examples of the application pattern of the adhesive include an Ω pattern, a spiral pattern, and a stripe pattern.

The joining portion between the top sheet 3 and the second sheet 4 is referred to as a first joining portion 11 and the joining portion between the absorbent 2 and the second sheet 4 is referred to as a second joining portion 12, And the top sheet 3 are referred to as the third joining portion 13 and the joining portion between the top sheet 3 and the back sheet 5 is referred to as the fourth joining portion 14 and the joining portion between the top sheet 3 and the back sheet 5 is the main sheet 51 And the side sheet 52 will be referred to as the fifth joining portion 15 and the specific positional relationship of the first to fourth joining portions 11 to 14 will be described later.

In this embodiment, as shown in Figs. 1, 2 and 4, the outer edge of the pad 1 is formed in a wavy shape in which a plurality of arcs are continuous. In addition, the pad 1 has a wing portion 10 provided at the center in the longitudinal direction for being fixed to the undergarment or the like in use. The wings (10) are substantially triangularly protruded so as to protrude outward in the width direction and are provided on both sides in the width direction, respectively.

The region where the wing portion 10 is provided is the central region 1a and the region ahead of the central region 1a is the front region 1b and the central region 1a, The rear area is defined as the rear area 1c. In the case of the pad not having the wing portion 10, the region corresponding to the region where the wing portion 10 is provided in the longitudinal direction is defined as the central region 1a.

Here, the boundary between the central region 1a and the front region 1b and the boundary between the central region 1a and the rear region 1c will be described in more detail with reference to FIG.

In the wing portion 10, the vertex 10a is located at the outermost position in the width direction. Of the plurality of arcs forming the outer edge of the pad 1 continuously from the apex 10a in the forward direction, the tangent of the tangent of the arc which is convex toward the inside of the pad 1 is set in order from the apex 10a side The point on the arc where the inclination of the tangent line is parallel to the longitudinal direction for the first time is referred to as a point 10b on the front side. In this case, the line connecting the pair of front side points 10b in the width direction is set as a boundary line (front side boundary line) between the central region 1a and the front region 1b, The front region 1b becomes the front region 1b.

Likewise, among the plurality of arcs forming the outer edge of the pad 1 continuing rearward from the apex 10a, the inclination of the tangent of the arc which is convex toward the inside of the pad 1 is changed from the apex 10a side In order to observe in order, a point on the arc where the inclination of the tangent line becomes parallel to the longitudinal direction for the first time is referred to as a point 10c on the rear side. In this case, a line connecting the pair of rear side points 10c in the width direction is set as a boundary line (rear side boundary line) between the center region 1a and the rear region 1c, Is the rear region 1c.

Therefore, the area from the front side boundary line to the rear side boundary line in the longitudinal direction becomes the central area 1a. 2, a tangent line at a pair of points 10b on the front side and a tangent line at a pair of points 10c on the rear side are indicated by two-dot chain lines, and a front boundary line and a rear boundary line Dot chain lines.

3A and 3B, the absorbent core 2 is a member that absorbs liquid such as menstrual blood and holds the absorbent core 2 therein. The absorbent core 2 includes an absorbent core 21 formed of, for example, pulp fibers as liquid absorbent fibers, And a cover sheet 22 formed of a soft material such as a metal sheet.

The absorbent core 21 is stiffer and thicker than the topsheet 3, the second sheet 4 and the backsheet 5. As shown in Figs. 1 and 3A, the absorbent core 21 has a constricted portion 210 narrowed inward in the width direction at the center in the longitudinal direction. 1, the constricted portion 210 is provided in a long range in the direction longer than the central region 1a, but the constricted portion 210 is not limited to this and may be provided at least in the central region 1a It should be. The absorbent core 2 is not necessarily provided with the absorbent core 21 having the constricted portion 210.

3A and 3B, both ends of the cover sheet 22 in the width direction overlap with each other on the non-skin side in the thickness direction in a state in which the absorbent core 21 is pulled inward. 3A, the absorbent core 21 is provided between the cover sheet 22 and the absorbent core 21 in at least the central region 1a, as shown in Fig. 3A, since the absorbent core 21 has the constricted portion 210, Space is intervening.

The topsheet 3 is a member that permeates liquid such as menstrual blood, and is formed of a liquid-permeable nonwoven fabric or the like. In this embodiment, a top sheet 3, for example 1.3dtex~2.2dtex the thin fibers (preferably about ^{1.7dtex) 20kg / m 3 ~40kg / m} 3 ( preferably from 25kg / m ³ ~ 35 kg / m < ³ >). As a result, the topsheet 3 has a good flexibility and a fluffy feel, so that the skin receives a good feel. The topsheet 3 may be a member having at least liquid permeability.

As shown in Figs. 3A and 3B, the topsheet 3 has folded back folded back portions 32 on both sides in the width direction. The folded back portion 32 is formed by folding back the topsheet 3 at the folding line 32b. The folding line 32b is located on both sides in the width direction of the flat surface portion 31 covering the skin side surface of the absorbent body 2 in the topsheet 3. [

The leading end 320a of the folded back portion 32 is positioned between the absorbent body 2 and the back sheet 5 in the thickness direction. The distal end portion 320 including the distal end 320a is extended in the width direction toward the inside (central side) between the absorbent body 2 and the back sheet 5 in the thickness direction, . The front end portion 320 is joined to the back sheet 5 by a pair of fourth joining portions 14 arranged in the width direction between the absorber 2 and the back sheet 5 in the thickness direction. Therefore, the topsheet 3 is bonded to the backsheet 5 at the tip portion 320. As shown in Fig.

Like the topsheet 3, the second sheet 4 is a member that permeates liquid such as menstrual blood, and is formed of nonwoven fabric of liquid permeable synthetic fibers. As shown in Figs. 3A and 3B, both ends in the width direction of the secondary sheet 4 are provided with a folded back region 400, and the folded back region 400 is folded along the width direction of the absorbent body 2 And is located between the top sheet 3 and the top sheet 3.

In the present embodiment, both ends of the secondary sheet 4 are provided with the folded region 400 over the whole of the central region 1a, the front region 1b and the rear region 1c, (400) is positioned between the absorbent body (2) and the topsheet (3) in the width direction. However, the present invention is not limited to this, and both end portions of the secondary sheet 4 may be located at least in the central region 1a between the absorbent body 2 and the top sheet 3 in the width direction.

The central region 1a is a region in which the user's legs are frequently in contact with each other when the pad 1 is worn. As described above, the absorbent body 2 is formed so as to be stiffer than the topsheet 3 and the secondary sheet 4, and the user is able to adjust the thickness of the topsheet 3 and the secondary sheet 4 A large contact pressure is received from the absorber 2.

Since both end portions in the width direction of the secondary sheet 4 are located at least between the absorbent body 2 and the topsheet 3 in the width direction in the central region 1a at least in the present embodiment, It is possible to receive contact pressure from both the folded back portion 32 of the topsheet 3 and both end portions of the secondary sheet 4 softer than the absorbent body 2 before receiving the contact pressure from the absorbent body 2, It is possible to relax the contact pressure from the absorber 2 to which both legs are subjected, thereby suppressing the discomfort of the pad and improving the fitting performance of the pad 1.

Since both ends of the secondary sheet 4 are provided with the folded regions 400, the legs can receive contact pressure from regions having a wider surface than the both end faces of the secondary sheet 4, The feeling of discomfort in the hips is further suppressed as compared with the case where the contact pressure is applied from the edge (edge).

The absorbent core 2 has the constricted portion 210 so that the absorbent core 21 is constricted inwardly in the width direction at least in the central region 1a so that the folded back portion of the top sheet 3 The distance in the width direction from the absorbent core 21 to the absorbent core 21 becomes longer so that the absorbent core 21 immediately after the legs are pressed against the folded back portion 32 of the topsheet 3 and both ends of the secondary sheet 4 It is possible to reduce the contact pressure from the absorbent core 21 to which both legs are subjected.

As shown in Figs. 3A and 3B, a gap S is provided between the absorbent core 21 and the tip end 400a of the folded back region 400, which is an end in the width direction of the secondary sheet 4 . In the present embodiment, the gap S is provided in the entire longitudinal direction of the central region 1a, the front region 1b and the rear region 1c, but the present invention is not limited to this. The gap S may be provided. It is not always necessary that the gap S be provided between the tip end 400a of the secondary sheet 4 and the absorbent core 21 but it is preferable that the gap S is provided.

This is because the pad 1 having the gap S has a region in which the top sheet 3 and the second sheet 4 exist and a region in which only the top sheet 3 exists in the thickness direction. In the region where only the topsheet 3 is present, the rigidity is lower than that of the regions where the topsheet 3 and the secondary sheet 4 are present. Therefore, when a force in the width direction is applied from both legs in the central region 1a, Deformation occurs in an area where only the sheet 3 exists. That is, the region where only the topsheet 3 exists is more likely to be deformed than the region where the topsheet 3 and the secondsheet 4 are present.

Therefore, the regions where the topsheet 3 and the secondary sheet 4 are present on the skin side in the thickness direction are easier to rise in the thickness direction than the regions where only the topsheet 3 is present, The contact pressure from the top sheet 3 and the secondary sheet 4, which are received by the legs, can be relaxed, and the uncomfortable feeling in the hosiery can be further suppressed.

As shown in Fig. 1, the top sheet 3 and the second sheet 4 are joined in the thickness direction by a pair of seal portions 6 extending in the longitudinal direction provided side by side in the width direction. Examples of the bonding method of the topsheet 3 and the secondary sheet 4 include fusion bonding by pressure bonding. As shown in Figs. 1 and 3A, the pair of seal portions 6 are located outside the width direction of the constricted portion 210 at the position where the constricted portion 210 is provided. In Figs. 3A and 3B, the pair of seal portions 6 are shown as dot regions, respectively. The pair of seal portions 6 are formed by a plurality of dot-shaped pressed portions. In the present embodiment, the top sheet 3 and the second sheet 4 And is fused.

This allows the legs to be brought into contact with the backsheet 32 of the topsheet 3 and both ends of the second sheet 4 before being subjected to contact pressure from the absorbent core 21, Contact pressure from the absorbent core 21 can be received from the absorbent core 21 and the contact pressure from the absorbent core 21 is not immediately received.

Since the rigidity of the topsheet 3 and the secondary sheet 4 is increased at the positions where the pair of seal portions 6 are provided, when the force is applied to the pad 1 in the width direction, Both the folded back portion 32 of the topsheet 3 and the both end portions of the second sheet 4 are likely to rise or fall in the thickness direction from the pair of seal portions 6 as a starting point. As a result, since the legs can receive contact pressure from the entire surface or the entire lower surface in the thickness direction, the contact pressure from the top sheet 3 and the secondary sheet 4, which are subjected to both legs, The discomfort of the liver is further suppressed.

The pair of seal portions 6 need not necessarily be located outside the widthwise direction of the constricted portion 210 over the entire position where the constricted portion 210 is provided but may be formed at least in the narrowest portion 210 of the constricted portion 210 Position of the constricted portion 210 in the width direction.

3A and 3B, the absorbent body 2, the topsheet 3, and the second sheet 4 are pressed in the thickness direction by the first pressing portion 71 and the second pressing portion 72 Respectively. Examples of the pressing method of the absorber 2, the top sheet 3 and the secondary sheet 4 include heat embossing. In the present embodiment, the first pressing portion 71 and the second pressing portion 72 are formed by laminating a plurality of concave portions at regular intervals, but the present invention is not limited to this. For example, Or may be formed in a groove shape as an island.

As shown in Fig. 1, a pair of first crimping portions 71 formed so as to extend in the longitudinal direction are provided side by side in the width direction at a position where the narrowing portion 210 is provided, And a second crimping portion 72 formed in a heart shape is provided at the rear position.

As shown in Figs. 3A and 3B, both ends of the second sheet 4 are located on the outer side in the width direction with respect to the first squeezing portion 71 and the second squeezing portion 72. As shown in Fig. Therefore, since the both end portions of the secondary sheet 4 are not bonded to the absorber 2 or the top sheet 3 by the first and the second pressing portions 71 and 72, , The degrees of freedom of the fibers at both ends are increased, and the feel to which the legs are subjected is improved, thereby further suppressing discomfort in the hairs. In Figs. 3A and 3B, the first pressing portion 71 and the second pressing portion 72 are shown as halftone dots.

In this embodiment, as shown in Fig. 1, at the narrowest position of the constricted portion 210, the distance from the outer edge in the width direction of the absorbent core 21 to the folded back line 32b of the topsheet 3 The distance L1 is longer than the distance L2 from the outer edge in the width direction of the absorbent core 21 to the outer edge in the width direction of the first press portion 71. [ As a result, the portion of the topsheet 3 and the secondary sheet 4 that is not bonded by the first bonding portion 71, that is, the portion where the degree of freedom of the fiber is large, The feeling felt by both legs is improved, and the feeling of discomfort in the hips is further suppressed.

As shown in Figs. 3A and 3B, the back sheet 5 is formed by joining the main sheet 51 and the pair of side sheets 52 in the thickness direction by the fifth joining portion 15. As shown in Fig. The main sheet 51 is formed of a liquid impermeable synthetic film or the like, and is provided on the most non-skin side in the thickness direction. The pair of side sheets 52 are formed of a soft non-woven fabric or the like, and are provided on the skin side in the thickness direction with respect to the main sheet 51. More specifically, the pair of side sheets 52 are arranged between the leading end portion 320 of the folded back portion 32 of the top sheet 3 and the main sheet 51 in the thickness direction.

The pair of side sheets 52 are joined to the front end portion 320 of the folded back portion 32 of the topsheet 3 by a pair of fourth joining portions 14. The pair of fourth joints 14 are located on the inner side in the width direction with respect to the folding line 32b of the topsheet 3.

3A and 3B, the main sheet 51 and the side sheets 52 are formed in the center region 1a so as to extend outward in the width direction from the folded back portion 32 of the topsheet 3, And the wing portion 10 is formed by the extending projection portion.

As described above, the top sheet 3 and the back sheet 5 are joined to the pair of fourth joining portions 14 located on the inner side in the width direction with respect to the backward folding line 32b in the topsheet 3 The top sheet 3 and the back sheet 5 are not bonded to each other in the thickness direction on the outer side in the width direction with respect to the pair of fourth bonding portions 14. [ Therefore, the extending portion of the back sheet 5 forming the wing portion 10 is not bonded to the top sheet 3. [ Thereby, when the wing portion 10, that is, the extended portion of the back sheet 5 is folded toward the non-skin side in the thickness direction and is attached to the undergarment, the top sheet 3 is attracted by the back sheet 5 It is possible to prevent discomfort in the pouch 1 when the pad 1 is worn.

The wing portion 10 need not always be formed by the main sheet 51 and the side sheet 52 and the side sheet 52 may be provided on the top sheet 3 in at least the central region 1a, The wing portion 10 may be formed by protruding outwardly of the folded portion 32 in the width direction.

As shown in Fig. 2, on the non-skin side surface of the main sheet 51, a strip-like body sticking portion 16a extending in the longitudinal direction is attached to the flat surface portion 31 (Fig. 1 And a pair of blade attaching portions 16b are provided at a portion corresponding to the pair of wing portions 10. [ When the pad 1 is used, the main body adhesive portion 16a is attached to the inner side of the crotch portion of the undergarment, and the pair of wing portions 10 are folded toward the non-skin side to bend the pair of wing- The pad 1 is fixed to the undergarment.

<Regarding the Position Relationship of the First to Fourth Joints 11 to 14>

Next, the positional relationship of the first to fourth junctions 11 to 14 will be described with reference to Figs. 3A, 3B, and 4. Fig.

Fig. 4 is a schematic plan view showing the positional relationship between the pair of fourth central joint portions 14a, the pair of fourth forward joint portions 14b, and the pair of fourth rearward joint portions 14c.

As shown in Figs. 3A and 3B, a joining portion joining two members of the absorber 2, the top sheet 3, the second sheet 4 and the back sheet 5 to each other, that is, Folding lines 11 to 14 are located on the inner side in the width direction with respect to the folding line 32b in the topsheet 3. [ This increases the degree of freedom of the fibers at the folded-back portion 32 of the topsheet 3, so that the feel to be felt by both legs at the time of using the pad 1 is improved, and the discomfort feeling of the pad is suppressed. It should be noted that the first to fourth joining portions 11 to 14 do not necessarily have to be located inward in the width direction with respect to the folding line 32b in the topsheet 3. [

The first joining portion 11 joining the top sheet 3 and the second sheet 4 in the thickness direction is located inward in the width direction with respect to both ends of the second sheet 4. Therefore, since the top sheet 3 and the second sheet 4 are not bonded to each other in the thickness direction at the both the folded back portion 32 of the top sheet 3 and the both end portions of the second sheet 4, Therefore, the feel of the legs is improved when the pad 1 is used, and the feeling of discomfort in the legs is further suppressed.

As shown in Figs. 3A, 3B and 4, a pair of fourth joining portions 14 joining the topsheet 3 and the backsheet 5 in the thickness direction has a central region 1a, a front region 1b and the rear region 1c, respectively. In the following description, it is assumed that the pair of fourth joining portions 14 in the central region 1a is a pair of fourth central joining portions 14a and the pair of fourth joining portions 14a in the front region 1b The joining portion 14 is a pair of fourth front joining portions 14b and the pair of fourth joining portions 14 in the rear region 1c is a pair of fourth rear joining portions 14c.

The pair of fourth central joint portions 14a are provided in the central region 1a to extend in the longitudinal direction and one end portion in the longitudinal direction extends to the front region 1b and the other end extends to the rear region 1c . The pair of fourth front joint portions 14b are provided extending in the longitudinal direction from the front end to the central region 1a side in the front region 1b. The pair of fourth rear joint portions 14c extend in the longitudinal direction from the rear end toward the central region 1a in the rear region 1c.

4, the positions of the pair of fourth front joint portions 14b, the positions of the pair of fourth rearward junction portions 14c and the positions of the pair of fourth central joint portions 14a are at least Some are overlapped in the longitudinal direction. The position of the pair of fourth front joint portions 14b and the position of the pair of fourth rear joint portions 14c and the position of the pair of fourth central joint portions 14c 14a are overlapped with each other in the longitudinal direction so that it is difficult for the topsheet 3 and the backsheet 5 to fall off even when a force in the width direction is applied from both legs at the time of wearing the pad 1 .

The positions of the pair of fourth front joint portions 14b and the positions of the pair of fourth rear joint portions 14c and the positions of the pair of fourth central joint portions 14a are partially overlapped For example, a pair of fourth central joint portions 14a are provided all over the longitudinal direction of the pad 1, and the positions of the entire pair of fourth front joint portions 14b and the positions of the pair of fourth central joint portions 14a, The position of the entire rear joint portion 14c may overlap the position of the pair of fourth central joint portions 14a.

As shown in Fig. 4, the pair of fourth front joint portions 14b are formed such that the end portion 140b on the side of the central region 1a, which is the inner one in the longitudinal direction, In the constricted portion 210 of the front side, the constriction starting position 210b on the front side. Likewise, the pair of fourth rear joint portions 14c are formed such that the end portion 140c on the side of the central region 1a, which is the inward one in the longitudinal direction, is located on the rear side of the constricted portion 210 And is arranged at the narrowing start position 210c.

The ends 140b of the pair of fourth front joint portions 14b are connected to the constriction starting position 210b on the front side and the ends 140c of the pair of fourth rear junction portions 14c are connected to the rear side And the ends 140b of the pair of fourth front joint portions 14b are arranged on the inner side (center side) of the constriction starting position 210b on the front side And the ends 140c of the pair of fourth rear joint portions 14c may be disposed on the inner side (center side) of the constriction starting position 210c on the rear side.

As a result, the ends 140b of the pair of fourth front joint portions 14b and the ends 140c of the pair of fourth rear joint portions 14c are located in the region where the constricted portions 210 are provided , It is difficult for the top sheet 3 and the back sheet 5 to be further loosened even when a force in the width direction is applied to the portion where the constricted portion 210 is provided at the time of wearing the pad 1 from both legs Loses.

At least one of the pair of joining end portions 140b and 140c of the pair of fourth front joining portions 14b and the pair of fourth rear joining portions 14c is formed into a constricted starting position 210b, 210c, or the constricted start positions 210b, 210c.

As shown in Figs. 3A, 3B and 4, the pair of fourth front joint portions 14b and the pair of fourth rearward joining portions 14c are formed so as to extend in the widthwise direction from the pair of fourth central joint portions 14a Respectively. In other words, the pair of fourth central joint portions 14a are positioned inward in the width direction with respect to the pair of fourth forward joint portions 14b and the pair of fourth rearward joint portions 14c.

Therefore, in the central region 1a where the legs are in frequent contact with each other, the pair of fourth central joint portions 14a are located inward of the pair of fourth forward joint portions 14b and the fourth rear joint portions 14c in the width direction The portion corresponding to the folded back portion 32 of the topsheet 3 can be secured in a wide area. Therefore, the legs are subjected to contact pressure from a wider surface of the topsheet 3 that is smoother than the absorbent body 2 before receiving contact pressure from the absorbent body 2, The contact pressure is relaxed, leading to suppression of discomfort in the liver.

On the other hand, in the front region 1b and the rear region 1c, the pair of fourth front junction portions 14b and the pair of fourth rear junction portions 14c are arranged in the width direction (See Figs. 1, 3A, and 3B) of the topsheet 3, which is the skin-side surface that absorbs liquid such as menstrual blood, Can be further secured, leading to suppression of liquid leakage.

=== Other ===

The above embodiments are for the purpose of facilitating understanding of the present invention and are not intended to limit the present invention. The present invention can be modified and improved without departing from the spirit of the present invention, and equivalents thereof are included in the present invention.

1: pad (absorbent article) 1a: central region
1b: front region 1c: rear region
2: absorber 3: top sheet
4: Second sheet 5: Back sheet
6: seal part 11: first joint part (joint part)
14, 14a, 14b, 14c: a fourth junction (a pair of junctions)
21: absorbent core 32:
52: side seat
140b, 140c: an end of the central region side (inner end)
210: constriction 210b, 210c: constriction starting position
320: leading edge 400: folded back region
400a: leading edge S: clearance

Claims (10)

Widthwise direction and thickness direction,
An absorbent body for absorbing liquid,
A top sheet covering the absorbent body from one side in the thickness direction of the absorbent body,
And a back sheet provided on the other side of the absorbent body in the thickness direction,
The top sheet has folded back folded portions on both sides in the width direction,
The front end portion of the folded back portion is bonded to the back sheet by a pair of joining portions arranged in the width direction between the absorbent body and the back sheet in the thickness direction,
Characterized in that the pair of joining portions in the front region and the rear region in the longitudinal direction are located on the outer side in the width direction with respect to the pair of joining portions in the central region in the longitudinal direction . The method according to claim 1,
Wherein a position of the pair of the joining portions of the front region and the rear region and a position of the pair of joining portions of the central region are partially overlapped in the longitudinal direction. 3. The method according to claim 1 or 2,
Wherein the absorbent core has an absorbent core having a constricted portion narrowed inward in the width direction at least in the central region. The method of claim 3,
And an inner end of at least one of the pair of the joining portions of at least one of the front region and the rear region is disposed inside the constriction starting position or the constriction starting position of the constriction in the longitudinal direction &Lt; / RTI &gt; 3. The method according to claim 1 or 2,
Wherein the back sheet has a side sheet formed to protrude outwardly in the width direction from the folded back portion of the top sheet in the central region. 3. The method according to claim 1 or 2,
Further comprising a second sheet between the absorbent body and the top sheet in the thickness direction,
Wherein at least the both end portions in the width direction of the secondary sheet are located between the absorbent body and the top sheet in the width direction at least in the central region in the longitudinal direction. The method according to claim 6,
Wherein the absorbent core has an absorbent core having a constricted portion narrowed inward in the width direction at least in the central region,
Wherein a gap is provided in the central region between the widthwise end of the secondary sheet and the absorbent core. 8. The method of claim 7,
Wherein the both ends of the second sheet have a folded back region on the side of the absorbent body. The method according to claim 6,
Wherein the joining portion joining the top sheet and the second sheet in the thickness direction is located inward in the width direction with respect to the both end portions of the second sheet. The method according to claim 6,
Wherein the absorbent core has an absorbent core having a constricted portion narrowed inward in the width direction at least in the central region,
Wherein the top sheet and the second sheet are pressed and bonded to each other in the thickness direction by a crimping portion on both sides in the width direction,
Wherein the compression bonding portion is located on the outer side in the width direction of the constricted portion at least at the most constricted position of the constricted portion.

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