TWI586336B - Absorbent items - Google Patents

Description

Absorbent article

This invention relates to absorbent articles.

Conventionally, sanitary napkins for absorbent articles are known. For example, the sanitary napkin disclosed in Patent Document 1 includes a liquid permeable surface material that is in contact with the skin to allow body fluids such as menstrual blood to pass through, a leakage preventing material that is in contact with the undergarment to prevent body fluid from leaking, and a surface material. A liquid-retaining absorber between the leak-proof material and the leak-proof material.

The surface material of the sanitary napkin is directly covered on the skin contact surface side and the side surface side of the absorbent body, and the non-skin contact surface side is fixed to the absorber and the leakage preventing material by a fixing agent. That is, the skin contact surface side and the side surface side of the absorbent body are covered with the surface material, and the non-skin contact surface side of the absorbent body is covered with the leakage preventing material.

[Patent Document 1] Japanese Patent Laid-Open No. 7-184957

The sanitary napkin described in Patent Document 1 is worn when Applying a force in the width direction from both feet of the user flattens the absorber, and the abutting pressure from the absorber which is harder than the surface material acts directly on both feet. As a result, the user feels the abnormal feeling of the underarm, and the wearability is deteriorated.

The present invention has been made in view of the above problems, and an object thereof is to provide an absorbent article which can improve the wearability by suppressing an abnormal feeling under the armpit.

An absorbent article according to a main aspect of the present invention has a longitudinal direction, a width direction, and a thickness direction, and includes an absorbent body that absorbs a liquid, and covers a top sheet of the absorbent body from a side in the thickness direction of the absorbent body. a second sheet disposed between the absorber and the top sheet in the thickness direction, and a bottom sheet disposed on the other side of the absorbent body in the thickness direction, wherein the top sheet is in the width direction Both sides have a folded-back portion; the front end of the folded-back portion is located between the absorbent body and the bottom sheet in the thickness direction; at least in the central portion of the longitudinal direction, the width of the second sheet Both end portions of the direction are located between the absorber and the top sheet in the width direction. Other features of the present invention will become apparent from the description of the specification and appended claims.

According to the present invention, the abnormal feeling under the armpit can be suppressed and the wearability can be improved.

1‧‧‧Sanitary cotton (absorbent articles)

1a‧‧‧Central area

1b‧‧‧ front area

1c‧‧‧ rear area

2‧‧‧ absorber

3‧‧‧Top sheet

4‧‧‧Second sheet

5‧‧‧ bottom sheet

11~13‧‧‧1st to 3rd joints (joining parts)

14, 14a, 14b, 14c‧‧‧4th joint (joint joint of a pair)

21‧‧‧Absorbent core

32‧‧‧Devolved Department

32b‧‧‧Foldback line

52‧‧‧Side sheet

71‧‧‧1st compression unit (compression unit)

72‧‧‧2nd compression unit (compression unit)

140b, 140c‧‧‧ end of the central area side (inside side)

210‧‧‧ narrowing

210b, 210c‧‧‧ narrow start position

320‧‧‧ front end

320a‧‧‧ front end

400‧‧‧Returned area

Fig. 1 is a schematic plan view of the sanitary napkin according to the embodiment of the present invention as seen from the skin side in the thickness direction.

Fig. 2 is a schematic plan view of the sanitary napkin as viewed from the non-skin side in the thickness direction.

3A is a cross-sectional view taken along line IIIA-IIIA of FIG. 1, and FIG. 3B is a cross-sectional view taken along line IIIB-IIIB of FIG. 1.

4 is a schematic plan view showing a positional relationship between the fourth center joint portion, the fourth front joint portion, and the fourth rear joint portion.

At least the following matters can be understood from the description of the specification and the drawings.

An absorbent article having a longitudinal direction, a width direction, and a thickness direction, and comprising: an absorbent body that absorbs a liquid; and a top sheet covering the absorbent body from a side in the thickness direction of the absorbent body, and is disposed in the thickness direction a second sheet between the absorber and the top sheet, and a bottom sheet provided on the other side in the thickness direction of the absorber, wherein the top sheet is folded back on both sides in the width direction a folded-back portion; the front end of the folded-back portion is located between the absorber and the bottom sheet in the thickness direction; at least in the central portion of the longitudinal direction, the width of the second sheet Both end portions of the direction are located between the absorber and the top sheet in the width direction.

In this way, in the central region in the longitudinal direction where the frequencies at which the two legs are contacted are high, since both end portions of the second sheet are located between the absorber and the top sheet in the width direction, the both legs receive the contact from the absorber. Before the pressing, the abutting pressure from the folded portion of the top sheet which is softer than the absorbent body and the both end portions of the second sheet can be accepted, so that the contact pressure from the absorbent body is not directly received. In this way, the contact pressure from the absorbent body received by both legs can be alleviated, and the abnormal feeling under the armpit can be suppressed, and the wearability of the absorbent article can be improved.

In the absorbent article, it is preferable that the both end portions of the second sheet have a folded-back region.

In this way, the two legs can receive the abutting pressure from the folded-back region, and the folded-back region has a wider surface than the both end faces of the second sheet, and thus receives the abutting pressure from the both end faces (end edges). In other cases, the abnormal feeling under the armpit can be further suppressed.

In the absorbent article, it is preferable that the absorbent system includes an absorbent core having a narrowed portion that narrows toward the inner side in the width direction at least in the central region.

In this way, in the central region, the distance from the folded portion of the top sheet to the absorbent core becomes longer in the width direction, and the two legs receive the abutment pressure from the folded portion of the top sheet and the both ends of the second sheet, and are immediately accepted. The situation of the abutting pressure from the absorbent core can suppress the occurrence of the pressure, and the contact pressure from the absorbent core received by both legs can be alleviated.

Preferably, the detachable portion is formed by folding back the top sheet along a folding line; and for arranging any two of the absorbent body, the top sheet, the second sheet, and the bottom sheet The joint portions that are joined to each other are located on the inner side in the width direction of the folding line.

In this way, the degree of freedom of the fiber is increased in the folded portion of the top sheet, and the feeling of both feet is improved when the absorbent article is used, and the abnormal feeling under the armpit can be suppressed.

In the absorbent article, it is preferable that the joint portion that joins the top sheet and the second sheet in the thickness direction is located on the inner side in the width direction of the both end portions of the second sheet.

Thus, in the folded portion of the top sheet and the both end portions of the second sheet, the top sheet and the second sheet are not joined in the thickness direction, the degree of freedom of the fiber is increased, and the feeling of the feet is used in the use of the absorbent article. Better, can further suppress the abnormal feeling under the armpit.

In the absorbent article, it is preferable that the front end portion of the folded portion of the top sheet is in the thickness direction of the joint portion between the absorbent body and the bottom sheet by one pair in the width direction. The joining portion of the pair of the front sheet and the rear portion in the longitudinal direction is located outside the pair of the joint portions of the central portion in the width direction.

In this way, in the central region where the contact frequency between the two legs is high, the pair of joint portions are located on the inner side in the width direction from the joint portion of the pair of the front region and the rear region, so that the equivalent portion can be secured in a wider region. The portion of the folded portion of the top sheet which is softer than the absorbent body can alleviate the abutment pressure from the absorbent body received by both legs. On the other hand, in the front region and the rear region, the pair of joint portions are located outward in the width direction from the joint portion of the pair of the central regions, and the planar shape of the surface for absorbing the skin on the skin side can be further ensured.

In the absorbent article, it is preferable that the absorbent system includes an absorbent core having a narrowed portion narrowed toward the inner side in the width direction at least in the central region, and the aforementioned front region and the rear region. The inner end of at least one of the pair of the joint portions is disposed at a narrowing start position of the narrowed portion or further inside the narrowed start position in the longitudinal direction.

In this manner, the inner end of at least one of the joint portions of the pair of the front region and the rear region is located in the region where the narrowed portion is provided. Therefore, even when the absorbent article is worn, the force in the width direction is applied from both the legs. In the case of the portion provided with the narrowed portion, the joining of the top sheet and the bottom sheet is not easily detached.

In the absorbent article, it is preferable that at least a part of the position of the pair of the joint portions of the front region and the rear region overlaps with the position of the pair of the joint portions of the center region in the longitudinal direction.

Thus, in the central region side where the contact frequency of the two legs is high, the position of the joint portion of one of the front region and the rear region and the position of the joint portion of one of the central regions overlap in the longitudinal direction, even in the absorbent article. When applying a force in the width direction from both feet when wearing, the top sheet The engagement with the bottom sheet is also not easily detached.

In the absorbent article, preferably, in the central region, the bottom sheet has a side sheet which is formed to extend outward in the width direction from the folded portion of the top sheet.

Thus, the extended portion (a portion of the bottom sheet) for forming the side sheet of the wing portion is not joined to the top sheet, and when the extended portion is bent toward the non-skin side in the thickness direction and is worn on the undergarment, It is possible to avoid a situation in which the top sheet is pulled by the influence of the bottom sheet, and the abnormal feeling of the underarm can be suppressed when the absorbent article is worn.

In the absorbent article, it is preferable that the absorbent body, the top sheet, and the second sheet are joined by being compressed in the thickness direction by the compression portion, and the both end portions of the second sheet are located in comparison with the compression. The portion is further on the outer side in the width direction.

In this way, the both end portions of the second sheet are not joined to the absorber or the top sheet by the compressing portion, so that the degree of freedom of the fibers is increased at both end portions of the second sheet, and the feeling of both feet is improved, which can be further suppressed. Unusual feelings under your arm.

In the absorbent article, it is preferable that the absorbent system includes an absorbent core having a narrowed portion narrowed toward the inner side in the width direction at least in the central region, and the folded portion is the top sheet Formed along the fold line, the distance from the outer edge of the absorbent core in the width direction to the fold line at the most narrowed position of the narrowed portion is greater than the width from the absorbent core The distance from the outer edge of the direction to the outer edge of the aforementioned compression portion in the width direction is longer.

In this manner, the portion where the top sheet and the second sheet are not joined by the compression portion, that is, the portion having a large degree of freedom of the fiber, can be increased in the outer side in the width direction of the absorbent core, and the feeling of both feet becomes Well, it can further suppress the abnormal feeling under the armpit.

===implementation form ===

An example of the absorbent article according to the embodiment of the present invention is a sanitary napkin 1 (hereinafter simply referred to as a sanitary napkin 1). The absorbent article also includes, for example, a sanitary pad, that is, a so-called panty liner, and is not limited to a sanitary napkin.

<Configuration of Sanitary Cotton 1>

The structure of the sanitary napkin 1 will be described with reference to Figs. 1, 2, 3A and 3B.

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

The sanitary napkin 1 is a sheet-like member having a vertically long shape and has a longitudinal direction, a width direction, and a thickness direction. In the following description, the "longitudinal direction" indicates the longitudinal direction of the product of the sanitary napkin 1, the "thickness direction" indicates the direction of the thickness of the product of the sanitary napkin 1, and the "width direction" indicates the positive direction and the thickness direction. The short side direction of the intersection. In the longitudinal direction, when the sanitary napkin 1 is used, the direction of the ventral side of the user is set to "front". """, the direction of the back side of the user is set to "rear". Further, the thickness direction has a "skin side" on the side in contact with the skin of the user when the sanitary napkin 1 is used, and a "non-skin side" on the opposite side.

As shown in FIG. 3A and FIG. 3B, the sanitary napkin 1 includes an absorbent body 2, a top sheet 3 covering the absorbent body 2 from one side (skin side) in the thickness direction of the absorbent body 2, and an absorbent sheet 2 in the thickness direction. A second sheet 4 between the body 2 and the top sheet 3, and a bottom sheet 5 disposed on the other side (non-skin side) of the absorbent body 2 in the thickness direction. In the present embodiment, the bottom sheet 5 has two sheets of the main sheet 51 and the side sheet 52 in total.

The top sheet 3 and the second sheet 4, the absorbent body 2 and the second sheet 4, the absorbent body 2 and the top sheet 3, the top sheet 3 and the bottom sheet 5, and the main sheet 51 and the side sheet 52 of the bottom sheet 5 are respectively borrowed Bonding is carried out by an adhesive such as a hot melt adhesive. Examples of the application pattern of the adhesive include an Ω pattern, a spiral pattern, a stripe pattern, and the like.

In the following description, the joint portion between the top sheet 3 and the second sheet 4 is referred to as a first joint portion 11, and the joint portion between the absorber 2 and the second sheet 4 is referred to as a second joint portion 12, and the absorbent body 2 is referred to. The joint portion with the top sheet 3 is referred to as a third joint portion 13, and the joint portion of the top sheet 3 and the bottom sheet 5 is referred to as a fourth joint portion 14, and the joint portion of the main sheet 51 and the side sheet 52 of the bottom sheet 5 is joined. The fifth joint portion 15 is referred to, and the specific positional relationship between the first to fourth joint portions 11 to 14 will be described in detail later.

As shown in Fig. 1, Fig. 2, and Fig. 4, in the present embodiment, the outer edge of the sanitary napkin 1 is formed in a wave shape in which a plurality of circular arcs are connected. this Further, the sanitary napkin 1 has a wing portion 10 at the center in the longitudinal direction, and the wing portion 10 is placed and fixed to the undergarment or the like when in use. The wing portion 10 is formed in a substantially triangular shape so as to protrude outward in the width direction, and is provided on each of both sides in the width direction.

In the longitudinal direction of the sanitary napkin 1, the region in which the wing portion 10 is provided is referred to as a central region 1a, the region further forward than the central region 1a is referred to as a front region 1b, and the region rearward of the central region 1a is referred to as a rear portion. Area 1c. Further, in the case where the sanitary napkin of the wing portion 10 is not provided, the region corresponding to the region in which the wing portion 10 is provided is referred to as the central region 1a in the longitudinal direction.

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 more specifically described with reference to FIG. 2 .

In the wing portion 10, the point on the outermost side in the width direction is defined as the vertex 10a. Among the plurality of circular arcs which are formed by the apex 10a extending forward and forming the outer edge of the sanitary napkin 1, the slope of the tangent to the circular arc which is convex toward the inside of the sanitary napkin 1 is sequentially observed from the vertex 10a side. A point on the circular arc whose slope of the tangent line is first parallel to the longitudinal direction is defined as a point 10b on the front side. In this case, the connection line of the point 10b on the front side of the pair of the pair in the width direction is defined as the boundary line (front side boundary line) of the center area 1a and the front area 1b, and the area ahead of the front side boundary line. It becomes the front area 1b.

Similarly, among the plurality of arcs that extend from the apex 10a to the rear to form the outer edge of the sanitary napkin 1, when facing the sanitary napkin 1 The slope of the tangent of the convex arc is sequentially observed from the vertex 10a side, and the point on the arc whose slope of the tangent is first parallel to the longitudinal direction is defined as the point 10c on the rear side. In this case, the connecting line of the point 10c on the rear side of the pair of the pair in the width direction is defined as the boundary line (rear side boundary line) between the center area 1a and the rear area 1c, and the area rearward of the rear side boundary line. Become the rear area 1c.

Therefore, the region from the front side boundary line to the rear side boundary line in the longitudinal direction becomes the center area 1a. In FIG. 2, a tangent line of a pair of front side points 10b and a pair of rear side point 10c are indicated by two-dot chain lines, and the front side boundary line and the rear side boundary line are respectively indicated by a little chain line. .

The absorber 2 is a member that absorbs and retains a liquid such as menstrual blood, and has an absorbent core 21 formed of a liquid absorbent fiber, that is, a pulp fiber, and the like, as shown in FIG. 3A and FIG. 3B. A cover sheet 22 formed of a soft material such as a tissue.

The absorbent core 21 is harder than the top sheet 3, the second sheet 4, and the bottom sheet 5 and has a thickness. As shown in FIG. 1 and FIG. 3A, the absorbent core 21 has a narrowed portion 210 which is narrowed toward the inner side in the width direction at the center in the longitudinal direction. In the present embodiment, as shown in FIG. 1, the narrowed portion 210 is provided in a longer range than the central portion 1a in the longitudinal direction. However, the present invention is not limited thereto, and may be provided at least in the central region 1a. Further, the absorber 2 does not necessarily have to include the absorbent core 21 having the narrowed portion 210.

As shown in FIG. 3A and FIG. 3B, the cover sheet 22 is The absorbent core 21 is wound inside, and its both ends in the width direction are overlapped on the non-skin side in the thickness direction. In the present embodiment, since the absorbent core 21 has the narrowed portion 210, as shown in Fig. 3A, at least in the central region 1a, there is a space between the cover sheet 22 and the absorbent core 21.

The top sheet 3 is a member that allows a liquid such as menstrual blood to pass through, and is formed of a liquid-permeable nonwoven fabric or the like. In the present embodiment, as the top sheet 3, for example, fine fibers of 1.3 dtex to 2.2 dtex (preferably about 1.7 dtex) are combined to have a density of 20 kg/m ³ to 40 kg/m ³ (preferably 25 kg/m ³ ~ Non-woven fabric of about 35kg/m ³ ). Thus, the top sheet 3 has a good softness and a soft touch of the skin, so that the feeling of the skin becomes good. The present invention is not limited thereto, and the top sheet 3 may be any member having at least liquid permeability.

As shown in FIGS. 3A and 3B, the folded portion 32 is folded back on both sides in the width direction of the top sheet 3. The folded portion 32 is formed by folding back the top sheet 3 along the fold line 32b. The folding line 32b is located on both sides in the width direction of the flat portion 31 of the top sheet 3 covering the skin side of the absorbent body 2, respectively.

The front end 320a of the folded-back portion 32 is located between the absorber 2 and the bottom sheet 5 in the thickness direction. In the present embodiment, the front end portion 320 including the front end 320a extends between the absorber 2 and the bottom sheet 5 in the thickness direction toward the inner side (center side) in the width direction. The distal end portion 320 is joined to the bottom sheet 5 by the fourth joint portion 14 which is aligned in the width direction between the absorber 2 and the bottom sheet 5 in the thickness direction. Therefore, the top sheet 3 is connected to the bottom sheet 5 at the front end portion 320. Hehe.

The second sheet 4 is a member that transmits a liquid such as menstrual blood, similar to the top sheet 3, and is formed of a nonwoven fabric of liquid-permeable synthetic fibers or the like. As shown in FIG. 3A and FIG. 3B, both ends of the second sheet 4 in the width direction are provided with the folded-back region 400, and the folded-back region 400 is located between the absorber 2 and the top sheet 3 in the width direction.

In the present embodiment, the both ends of the second sheet 4 are provided with a region 400 which is folded back over the entire central region 1a, the front region 1b, and the rear region 1c, and the folded-back region 400 is located in the absorbent body in the width direction. 2 between the top sheet 3. However, the present invention is not limited thereto, and it is sufficient that at least the central portion 1a has both end portions of the second sheet 4 positioned between the absorber 2 and the top sheet 3 in the width direction.

When the sanitary napkin 1 is worn, the central area 1a is an area where the user's two-legged contact frequency is high. Further, as described above, the absorbent body 2 is formed to be harder than the top sheet 3 and the second sheet 4, and the user's both legs are subjected to a greater abutment pressure from the absorbent body 2 than the top sheet 3 and the second sheet 4. .

In the present embodiment, at least in the central portion 1a, since both end portions in the width direction of the second sheet 4 are located between the absorbent body 2 and the top sheet 3 in the width direction, the both legs receive the abutting pressure from the absorbent body 2. In the past, the contact pressure between the folded portion 32 of the top sheet 3 which is softer than the absorbent body 2 and the both end portions of the second sheet 4 can be received, and since the contact pressure from the absorbent body 2 is not directly received, the two can be alleviated. The abutment pressure from the absorbent body 2 received by the foot can suppress the abnormal feeling of the underarm and allow the wearability of the sanitary napkin 1 Upgrade.

Further, both end portions of the second sheet 4 are provided with the folded-back region 400, so that the two legs can receive abutment pressure from a region having a wider surface than the both end faces of the second sheet 4, compared to acceptance from the In the case of the abutting pressure of both end faces (end edges), the abnormal feeling under the armpit can be further suppressed.

Further, the absorbent body 2 has the narrowed portion 210, and the absorbent core 21 is narrowed toward the inner side in the width direction at least in the central portion 1a, so that the folded portion 32 of the top sheet 3 is at the width of the absorbent core 21 The distance in the direction is increased, and the contact pressure from the absorbent core 21 is immediately received after the two legs receive the contact pressure from the both ends of the folded portion 32 and the second sheet 4 of the top sheet 3, thereby suppressing the situation. Occurs, and the abutment pressure from the absorbent core 21 accepted by both legs can be alleviated.

As shown in FIG. 3A and FIG. 3B, a gap S is provided between one end in the width direction of the second sheet 4, that is, the front end 400a of the folded-back region 400 and the absorbent core 21. In the present embodiment, the gap S is provided throughout the longitudinal direction of the central region 1a, the front region 1b, and the rear region 1c. However, the present invention is not limited thereto, and the gap S may be provided at least in the central region 1a. Further, it is not necessary to provide the gap S between the front end 400a of the second sheet 4 and the absorbent core 21, but it is preferable to provide the gap S.

The reason for this is that the sanitary napkin 1 having the gap S in the thickness direction includes a region in which the top sheet 3 and the second sheet 4 are provided, and a region in which only the top sheet 3 is provided. In the area where only the top sheet 3 is provided, since it is lower in rigidity than the area in which the top sheet 3 and the second sheet 4 are provided, when When the force in the width direction is applied from the both legs in the central portion 1a, the region in which only the top sheet 3 is provided is deformed. That is, in the region where only the top sheet 3 is provided, deformation is more likely to occur than the region in which the top sheet 3 and the second sheet 4 are provided.

Therefore, the region in which the top sheet 3 and the second sheet 4 are provided on the skin side in the thickness direction is more easily erected in the thickness direction than the region in which the top sheet 3 is provided, and can be abutted from the entire erected surface. Since the pressure is applied, the contact pressure from the top sheet 3 and the second sheet 4 which are accepted by the both legs can be alleviated, and the abnormal feeling under the armpit 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 the sealing portions 6 which are arranged side by side in the width direction and extend in the longitudinal direction. The joining method of the top sheet 3 and the second sheet 4 is, for example, welding by pressurization and the like. As shown in FIGS. 1 and 3A, at a position where the narrowed portion 210 is provided, the pair of sealing portions 6 are located outside the narrowing portion 210 in the width direction. In FIGS. 3A and 3B, the pair of sealing portions 6 are shown in sand. The pair of sealing portions 6 are formed by a plurality of dot-shaped compression portions. In the present embodiment, the top sheet 3 and the second sheet 4 are welded to each other in the compression portion.

Thus, before receiving the abutting pressure from the absorbent core 21, the two legs receive a seal from a pair in addition to the abutting pressure from the folded portion 32 of the top sheet 3 and the both end portions of the second sheet 4. Since the contact pressure of the portion 6 does not directly receive the contact pressure from the absorbent core 21, the contact pressure from the absorbent core 21 received by both legs can be further alleviated.

Further, at the position where the pair of sealing portions 6 are provided, since the rigidity of the top sheet 3 and the second sheet 4 becomes high, when the two legs apply a force to the sanitary napkin 1 in the width direction, it is easy to use a pair of sealing portions 6 as At the starting point, the folded portion 32 of the top sheet 3 and both end portions of the second sheet 4 are erected or fallen in the thickness direction. In this way, the two legs can receive the contact pressure from the surface that rises in the thickness direction or the fallen surface, and the contact pressure from the top sheet 3 and the second sheet 4 received by the both legs can be alleviated, thereby further suppressing the flaw. The sense of abnormality underneath.

The pair of sealing portions 6 do not have to be located outside the widthwise direction of the narrowed portion 210 over the entire position where the narrowed portion 210 is provided, as long as at least the narrowed portion of the narrowed portion 210 is located at the narrowed portion. The outer side of the width direction of 210 can be used.

As shown in FIG. 3A and FIG. 3B, the absorber 2, the top sheet 3, and the second sheet 4 are joined by being compressed in the thickness direction by the first compression portion 71 and the second compression portion 72. The compression method of the absorber 2, the top sheet 3, and the second sheet 4 is, for example, hot embossing. In the present embodiment, the first compression portion 71 and the second compression portion 72 are formed by arranging a plurality of concave portions at a constant interval. However, the present invention is not limited thereto. For example, a plurality of concave portions are continuously arranged to form a groove shape. can.

As shown in FIG. 1 , at the position where the narrowed portion 210 is provided, the first compressed portion 71 formed to extend in the longitudinal direction is arranged in parallel in the width direction, and is further forward than the narrowed portion 210 or The second compressed portion 72 formed in a heart shape is provided at each of the rear positions.

Both ends of the second sheet 4 are as shown in FIGS. 3A and 3B The portion is located outside the first compression portion 71 and the second compression portion 72 in the width direction. Therefore, the both ends of the second sheet 4 are not joined to the absorber 2 and the top sheet 3 by the first compressing portion 71 and the second compressing portion 72, so that the fibers are free at both end portions of the second sheet 4. When the degree is increased, the feeling of both feet becomes better, and the abnormal feeling under the armpit can be further suppressed. In FIGS. 3A and 3B, the first compression unit 71 and the second compression unit 72 are indicated by grid lines.

In the present embodiment, as shown in Fig. 1, at the narrowest position of the narrowed portion 210, the distance L1 from the outer edge in the width direction of the absorbent core 21 to the folded-back line 32b of the top sheet 3 is 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 compressed portion 71 is longer. In the portion where the top sheet 3 and the second sheet 4 are not joined by the first compressing portion 71, that is, the portion where the degree of freedom of the fiber is large, the portion of the top sheet 3 and the second sheet 4 that is larger in the width direction than the absorbent core 21 is increased. The feeling of both feet is better, and the abnormal feeling under the armpit can be further suppressed.

As shown in FIG. 3A and FIG. 3B, the bottom 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. The main sheet 51 is formed of a non-liquid permeable synthetic film or the like and is disposed on the most non-skin side in the thickness direction. The pair of side sheets 52 are formed of a soft nonwoven fabric or the like, and are provided on the skin side in the thickness direction of the main sheet 51. More specifically, in the thickness direction, a pair of side sheets 52 are disposed between the front end portion 320 of the folded portion 32 of the top sheet 3 and the main sheet 51.

The pair of side sheets 52 are joined to the front end portion 320 of the folded portion 32 of the top sheet 3 by a pair of fourth joint portions 14. a pair The fourth joint portion 14 is located on the inner side in the width direction of the fold line 32b of the top sheet 3.

As shown in FIG. 3A, in the central portion 1a, the main sheet 51 and the side sheet 52 have portions extending outward in the width direction from the folded portion 32 of the top sheet 3, and the wing portion 10 is formed by the extending portion. .

As described above, the top sheet 3 and the bottom sheet 5 are joined by the fourth joint portion 14 which is located on the inner side of the fold line 32b of the top sheet 3 in the width direction, and thus is 4th in comparison with the pair. The joint portion 14 is further outward in the width direction, and the top sheet 3 and the bottom sheet 5 are not joined in the thickness direction. Therefore, the extended portion of the bottom sheet 5 for forming the wing 10 is not associated with the top sheet 3. In this way, when the wing portion 10, that is, the extended portion of the bottom sheet 5 is bent toward the non-skin side in the thickness direction and is worn on the undergarment, the situation in which the top sheet 3 is pulled by the influence of the bottom sheet 5 can be avoided. When wearing 1 can suppress the abnormal feeling of underarms.

The wing portion 10 does not have to be formed by the main sheet 51 and the side sheet 52, and the side sheet 52 is formed to extend outward in the width direction from the folded portion 32 of the top sheet 3 at least in the central portion 1a, and Thus, the wing portion 10 can be formed.

As shown in Fig. 2, on the non-skin side surface of the main sheet 51, a strip-shaped body adhesive portion 16a extending in the longitudinal direction is provided at a portion corresponding to the flat portion 31 (refer to Fig. 1) of the top sheet 3, and A pair of wing-adhering portions 16b are provided in portions corresponding to the pair of wing portions 10. When the sanitary napkin 1 is used, the body adhesive portion 16a is attached to the lower portion of the undergarment of the undergarment. On the side, the pair of wing portions 10 are bent toward the non-skin side, and the pair of wing-adhered portions 16b are attached to the outer side of the crotch portion, whereby the sanitary napkin 1 is fixed to the undergarment.

<Positional relationship of the first to fourth joint portions 11 to 14>

Next, the positional relationship between the first to fourth joining portions 11 to 14 will be described with reference to FIGS. 3A, 3B, and 4.

4 is a schematic plan view showing a positional relationship between the pair of fourth center joint portions 14a, the pair of fourth front joint portions 14b, and the pair of fourth rear joint portions 14c.

As shown in FIG. 3A and FIG. 3B, the joint portions of the absorber 2, the top sheet 3, the second sheet 4, and the bottom sheet 5 are joined to each other, that is, the first to fourth joint portions 11 to 14, the inner side is located in the width direction of the folding line 32b of the top sheet 3. As described above, in the folded portion 32 of the top sheet 3, the degree of freedom of the fiber is increased, and when the sanitary napkin 1 is used, the feeling of both feet is improved, and the abnormal feeling of the underarm can be suppressed. However, the first to fourth joining portions 11 to 14 are not necessarily located on the inner side in the width direction of the folding line 32b of the top sheet 3.

Further, the first joint portion 11 for joining the top sheet 3 and the second sheet 4 in the thickness direction is located on the inner side in the width direction from both end portions of the second sheet 4. Therefore, at the folded portion 32 of the top sheet 3 and both end portions of the second sheet 4, the top sheet 3 and the second sheet 4 are not joined in the thickness direction, so the degree of freedom of the fibers is increased, and the two legs are used when the sanitary napkin 1 is used. The feeling is better, and the abnormal feeling under the armpit can be further suppressed.

As shown in FIG. 3A, FIG. 3B and FIG. 4, the fourth joint portion 14 for joining the top sheet 3 and the bottom sheet 5 in the thickness direction is provided in the central portion 1a, the front region 1b, and the rear region. 1c each of these three areas. In the following description, the fourth joint portion 14 of one pair of the central regions 1a is referred to as a pair of fourth joint portions 14a, and the fourth joint portion 14 of one pair of the front regions 1b is referred to as a pair of 4 The front joint portion 14b is a fourth joint portion 14c that is a pair of the fourth joint portion 14 that is a pair of the rear region 1c.

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

Therefore, as shown in FIG. 4, the position 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 center joint portions 14a are at least a part of the length. The directions overlap. The position 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 center joint portions 14a are at the center region 1a side where the contact frequency of the both legs is high. Since the longitudinal direction overlaps, even when a force in the width direction is applied from both feet when the napkin 1 is worn, the joining of the top sheet 3 and the bottom sheet 5 is not easily released.

The position 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 center joint portions 14a may partially overlap as in the present embodiment, for example, a pair of 4 The central joint portion 14a may be provided over the entire longitudinal direction of the tampon 1, and the entire position of the pair of fourth front joint portions 14b and the position of the entire fourth rear joint portion 14c and the pair of the first pair 4 The positions of the central joint portions 14a overlap.

Further, as shown in FIG. 4, the inner end of the pair of fourth front joint portions 14b in the longitudinal direction, that is, the end 140b on the central portion 1a side is disposed in the narrowed portion 210 of the absorbent core 21 in the longitudinal direction. The narrowing start position 210b on the front side. Similarly, the inner end of the pair of fourth rear joint portions 14c in the longitudinal direction, that is, the end portion 140c on the central portion 1a side is a narrowed start position 210c disposed on the rear side of the narrowed portion 210 in the longitudinal direction.

In the present embodiment, the end 140b of the pair of fourth front joint portions 14b is disposed at the narrowing start position 210b on the front side, and the end 140c of the pair of fourth rear joint portions 14c is narrowed at the rear side. The position 210c is not limited thereto, and the end 140b of the pair of fourth front joint portions 14b may be disposed on the inner side (center side) of the narrower start position 210b on the front side, and the pair of fourth rear joints The end 140c of the portion 14c may be disposed on the inner side (center side) of the narrowing start position 210c on the rear side.

Thus, the end 140b of the pair of fourth front joint portions 14b and the end 140c of the pair of fourth rear joint portions 14c are located and narrowed. In the region of the portion 210, even when a portion in which the narrowed portion 210 is provided is applied with a force in the width direction from the both legs when the napkin 1 is worn, the joining of the top sheet 3 and the bottom sheet 5 can be prevented from being easily separated.

In the pair of fourth front joint portions 14b and the pair of fourth rear joint portions 14c, the ends 140b and 140c of the joint portion of at least one of the pair are disposed at the narrowing start positions 210b and 210c or at a ratio The narrowing start positions 210b, 210c may be further inside.

As shown in FIG. 3A, FIG. 3B, and FIG. 4, the pair of fourth front joint portions 14b and the pair of fourth rear joint portions 14c are located in the width direction of the pair of fourth joint joint portions 14a. The outside. In other words, the pair of fourth center joint portions 14a are located on the inner side in the width direction of the pair of fourth front joint portions 14b and the pair of fourth rear joint portions 14c.

Therefore, in the central region 1a having a high contact frequency between the two legs, the pair of fourth center joint portions 14a are located on the inner side in the width direction of the pair of the fourth front joint portion 14b and the fourth rear joint portion 14c. A portion corresponding to the folded-back portion 32 of the top sheet 3 is secured in a wider area. In this way, before the abutting pressure from the absorbent body 2 is received, the two legs receive abutting pressure from the wide outer surface of the top sheet 3 which is softer than the absorbent body 2, and the contact from the absorbent body 2 received by both feet can be alleviated. The pressure can suppress the abnormal feeling under the armpit.

On the other hand, in the front region 1b and the rear region 1c, the pair of fourth front joint portions 14b and the pair of fourth rear joint portions 14c are located outward in the width direction from the pair of fourth center joint portions 14a. , Therefore, it is possible to secure the planar shape of the flat surface portion 31 (see FIGS. 1, 3A, and 3B) of the surface of the top sheet 3 for absorbing the surface of the liquid such as menstrual blood, and to secure the absorption area of the liquid, thereby suppressing the liquid. Leaked out.

===Other ===

The above embodiments are intended to facilitate the understanding of the present invention and are not intended to limit the invention. The present invention can be modified or improved without departing from the spirit and scope of the invention.

1‧‧‧Sanitary cotton (absorbent articles)

2‧‧‧ absorber

3‧‧‧Top sheet

4‧‧‧Second sheet

5‧‧‧ bottom sheet

6‧‧‧ Sealing Department

10‧‧‧ wing

11~13‧‧‧1st to 3rd joints (joining parts)

14, 14a, 14c‧‧‧4th joint (joint joint of a pair)

15‧‧‧5th joint

16a‧‧‧ Body Adhesive

16b‧‧‧wing adhesion

21‧‧‧Absorbent core

22‧‧‧ Cover Sheet

31‧‧‧Flat Department

32‧‧‧Devolved Department

32b‧‧‧Foldback line

51‧‧‧Main sheet

52‧‧‧Side sheet

71‧‧‧1st compression unit (compression unit)

72‧‧‧2nd compression unit (compression unit)

210‧‧‧ narrowing

320‧‧‧ front end

320a‧‧‧ front end

400‧‧‧Returned area

400a‧‧‧ front end

S‧‧‧ gap

Claims (7)

An absorbent article having a longitudinal direction, a width direction, and a thickness direction, and comprising: an absorbent body that absorbs a liquid; and a top sheet covering the absorbent body from a side in the thickness direction of the absorbent body, and is disposed in the thickness direction a second sheet between the absorber and the top sheet, and a bottom sheet provided on the other side in the thickness direction of the absorber, wherein the top sheet is folded back on both sides in the width direction a folded-back portion; the front end of the folded-back portion is located between the absorber and the bottom sheet in the thickness direction; and the both end portions of the second sheet are provided with a region folded back toward the absorber side; In the central region in the longitudinal direction, a distal end of the folded-back region of the second sheet is located between the absorber and the top sheet in the width direction; the absorber, the top sheet, and the second sheet Engaging by compressing the compression portion in the thickness direction, the aforementioned second sheet The end portion is located outside the compression portion in the width direction; the absorption system includes an absorbent core having a narrowed portion narrowed inward in the width direction at least in the central region; The folding portion is formed by folding back the top sheet along the folding line. At a position where the narrowed portion is the most narrowed, the distance from the outer edge of the absorbent core in the width direction to the folding line is higher than the outer edge from the width direction of the absorbent core to the compression. The distance of the outer edge of the portion in the width direction is longer. The absorbent article according to claim 1, wherein the joint portion for joining the absorbent member, the top sheet, the second sheet, and the bottom sheet to each other is located above The fold line is further on the inner side in the width direction. The absorbent article according to claim 2, wherein the joint portion for joining the top sheet and the second sheet in the thickness direction is located at the both end portions of the second sheet The inner side in the width direction. The absorbent article according to claim 2, wherein the front end portion of the folded portion of the top sheet is in the thickness direction between the absorbent body and the bottom sheet by the width The joint portion of the pair of the directional rows is joined to the bottom sheet; and the pair of the joint portions in the front region and the rear region in the longitudinal direction are located more than the joint portion of the pair of the central regions The outer side in the width direction. The absorbent article according to claim 4, wherein an inner end of the pair of the joint portions of at least one of the front region and the rear region is disposed in the longitudinal direction The narrowing start position of the narrow portion or more than the narrowing start position Inside. The absorbent article according to claim 4, wherein a position of the pair of the joint portions of the front region and the rear region and a position of the pair of the joint portions of the central region are a part of Overlapping in the aforementioned length direction. The absorbent article according to claim 4, wherein in the central region, the bottom sheet has a side sheet formed to be wider than the folded portion of the top sheet The outside of the direction extends.