JP5978349B1 - Absorbent articles - Google Patents

Abstract

The present invention provides an absorbent article capable of improving dismountability by suppressing discomfort in the crotch and suppressing liquid leakage. An absorbent body that absorbs liquid, a top sheet that covers the absorbent body from one side in the thickness direction of the absorbent body, and a back sheet that is provided on the other side in the thickness direction of the absorbent body. The top sheet 3 has folded portions 32 that are folded back on both sides in the width direction, and the front end portion 320 of the folded portion 32 is connected to the absorber 2 and the back in the thickness direction. The pair of fourth joints 14 arranged in the width direction between the sheet 5 and the seat 5 are joined to the back sheet 5, and the pair of fourth joints 14b and 14c in the front region 1b and the rear region 1c It is located outside the pair of fourth joint portions 14a in the width direction. [Selection] Figure 3

Description

  The present invention relates to an absorbent article.

  Conventionally, sanitary napkins are known as absorbent articles. For example, Patent Document 1 discloses a liquid-permeable surface material that contacts skin and allows permeation of body fluid such as menstrual blood, a leak-proof material that contacts shorts and prevents leakage of body fluid, and a surface material and a leak-proof material. What is provided with the liquid holding | maintenance absorber interposed in between is disclosed.

  In this sanitary napkin, the surface material directly covers the skin contact surface side and the side surface side of the absorber, and is fixed to each of the absorber and the leakproof material via a fixing agent on the non-skin contact surface side. Has been. That is, the absorbent body has a skin contact surface side and a side surface covered with a surface material, and a non-skin contact surface side is covered with a leak-proof material.

JP-A-7-184957

  In the thing of patent document 1, when the force of the width direction is added from a user's both feet at the time of wear, an absorber will be crushed and both feet will receive contact pressure from an absorber harder than a surface material directly. It will be. As a result, the user may feel discomfort in the crotch, and the wearability may be deteriorated. In addition, when a force in the width direction is applied from both feet, the sanitary napkin is crushed in the width direction, so that the shape of the skin side surface that absorbs liquid such as body fluid is deformed and leakage occurs. There was a possibility.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to suppress discomfort in the crotch and improve wearability and to suppress liquid leakage. Is to provide an absorbent article.

  The main invention for achieving the above object has a longitudinal direction, a width direction, and a thickness direction, and covers the absorber from one side in the thickness direction of the absorber, which absorbs liquid. Absorbency comprising a top sheet, a second sheet provided between the absorber and the top sheet in the thickness direction, and a back sheet provided on the other side of the absorber in the thickness direction The top sheet has folded portions that are folded on both sides in the width direction, and a tip of the folded portion is positioned between the absorber and the back sheet in the thickness direction. And, at least in the central region in the longitudinal direction, both end portions in the width direction of the second sheet are located between the absorber and the top sheet in the width direction. It is an absorbent article. 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 discomfort in the crotch and improve the wearability, and to suppress liquid leakage.

It is the schematic plan view which looked at the napkin which concerns on embodiment of this invention from the skin side of the thickness direction. It is the schematic plan view which looked at the napkin from the non-skin side of the thickness direction. 3A is a cross-sectional view taken along line IIIA-IIIA in FIG. 1, and FIG. 3B is a cross-sectional view taken along line IIIB-IIIB in FIG. It is a schematic plan view which shows the positional relationship of a 4th center junction part, a 4th front junction part, and a 4th back junction part.

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

  An absorber that has a longitudinal direction, a width direction, and a thickness direction and absorbs liquid; a top sheet that covers the absorber from one side in the thickness direction of the absorber; and the thickness of the absorber An absorbent article provided with a back sheet provided on the other side of the direction, wherein the top sheet has folded portions folded on both sides in the width direction, and the tip of the folded portion is It is joined to the back sheet by a pair of joints arranged in the width direction between the absorber and the back sheet in the thickness direction, and the pair of the joints in the front area and the rear area in the longitudinal direction. The absorbent article in which the part is located on the outer side in the width direction than the pair of the joining parts in the central region in the longitudinal direction becomes clear.

  As a result, in the central region where the frequency of contact between both feet is high, the pair of joints are positioned on the inner side in the width direction than the pair of joints in the front region and the rear region. A portion corresponding to the portion can be secured in a wide area, and the contact pressure from the absorber received by both feet can be reduced. Therefore, the discomfort in the crotch is suppressed and the wearability of the absorbent article is improved. On the other hand, in the front region and the rear region, the pair of joints are positioned on the outer side in the width direction than the pair of joints in the central region, so that the planar shape of the skin side surface that absorbs the liquid can be further secured. It is possible to suppress leakage of the liquid.

  In this absorbent article, at least a part of the position of the pair of joint portions in the front region and the rear region and the position of the pair of joint portions in the center region overlap in the longitudinal direction. It is desirable.

  Thereby, in the central region side where the frequency with which both feet contact is high, the position of the pair of joint portions in the front region and the rear region overlaps the position of the pair of joint portions in the central region in the longitudinal direction. Even when a force in the width direction is applied from both feet during wearing, the bonding between the top sheet and the back sheet is difficult to peel off.

  In such an absorbent article, it is preferable that the absorbent body includes an absorbent core having a constricted portion constricted inside in the width direction at least in the central region.

  As a result, in the central region, the distance in the width direction from the folded portion of the top sheet to the absorbent core is increased, and immediately after both feet receive contact pressure from the folded portion of the top sheet and both ends of the second sheet. The situation of receiving the contact pressure from the absorbent core can be suppressed, and the contact pressure from the absorbent core received by both feet can be reduced.

  In such an absorbent article, at least one inner end of the pair of the joint portions of the front region and the rear region is in the longitudinal direction, the constriction start position of the constriction portion, or the constriction start It is desirable that it is arranged inside the position.

  Accordingly, since the inner end of at least one of the pair of joint portions in the front region and the rear region is located in the region where the constricted portion is provided, the constricted portion is provided when the absorbent article is worn. Even when a force in the width direction is applied to the portion where both feet are present, the bonding between the top sheet and the back sheet becomes more difficult to peel off.

  In this absorbent article, it is preferable that, in the central region, the back sheet has a side sheet formed to extend outward in the width direction from the folded portion of the top sheet.

  As a result, the extension part of the side sheet (part of the back sheet) that forms the wing part is not joined to the top sheet, so the extension part is bent to the non-skin side in the thickness direction and attached to the underwear When doing so, a situation in which the top sheet is pulled by the back sheet is avoided, and an uncomfortable feeling in the crotch when the absorbent article is worn can be suppressed.

  Such an absorbent article, further comprising a second sheet between the absorber and the top sheet in the thickness direction, at least in the center region in the longitudinal direction, both end portions in the width direction of the second sheet Is preferably located between the absorber and the top sheet in the width direction.

  As a result, both ends of the second sheet are positioned between the absorber and the top sheet in the width direction in the central region in the longitudinal direction where the frequency of contact between both feet is high. Before receiving, it is possible to receive contact pressure from the folded portion of the top sheet softer than the absorber and both ends of the second sheet, and it is not necessary to directly receive contact pressure from the absorber. Therefore, it becomes possible to relieve the contact pressure from the absorbent body received by both feet, and to suppress discomfort in the crotch, leading to an improvement in the wearability of the absorbent article.

  In such an absorbent article, the absorbent body includes an absorbent core having a constricted portion that is constricted inside in the width direction in at least the central region, and in the central region, an end of the second sheet in the width direction. It is desirable that a gap is provided between the absorbent core and the absorbent core.

  Thereby, an absorbent article will have the area | region in which a top sheet and a second sheet exist in a thickness direction, and the area | region in which only a top sheet exists. When force in the width direction is applied from both feet, deformation occurs from the region where only the top sheet having lower rigidity than the region where the top sheet and the second sheet exist, and the region where the top sheet and the second sheet exist is in the thickness direction. Easier to get up. Therefore, since the contact pressure can be received from the entire surface that has risen, the contact pressure from the top sheet and the second sheet received by both feet is alleviated, and the uncomfortable feeling between the crotch is further suppressed.

  In such an absorbent article, it is desirable that both end portions of the second sheet have folded regions.

  As a result, both feet can receive contact pressure from the folded region having a surface wider than both end surfaces of the second seat, so that the crotch is larger than when receiving contact pressure from both end surfaces (edges). A sense of discomfort is more suppressed.

  In such an absorbent article, it is preferable that a 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 than the both end portions of the second sheet. .

  Thereby, since the top sheet and the second sheet are not joined in the thickness direction at the folded portion of the top sheet and the both ends of the second sheet, the degree of freedom of the fibers is increased, and both feet receive when using the absorbent article. The feel is improved and the discomfort in the crotch is further suppressed.

  In this absorbent article, the absorbent body includes an absorbent core having a constricted portion constricted inside in the width direction at least in the central region, and the top sheet and the second sheet are arranged in the width direction. It is desirable that the squeezed portion is squeezed and joined in the thickness direction on both sides, and the squeezed portion is preferably located outside the constricted portion in the width direction at least at the most constricted position of the constricted portion. .

  As a result, the rigidity of the top sheet and the second sheet is increased at the position where the compressed portion is provided, and therefore, when both feet apply force in the width direction to the absorbent article, the top sheet is folded back starting from the compressed portion. The both ends of the portion and the second sheet are likely to rise or fall in the thickness direction. Therefore, both feet can receive contact pressure from the entire surface rising or falling in the thickness direction, so the contact pressure from the top sheet and the second seat received by both feet is relaxed, and the Is more suppressed.

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

<Configuration of napkin 1>
The configuration of the napkin 1 will be described with reference to FIGS. 1, 2, 3A, and 3B.

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

  The napkin 1 is a sheet-like member that is vertically long in plan view, and has a longitudinal direction, a width direction, and a thickness direction. In the following description, “longitudinal direction” refers to the longitudinal direction of the product of the napkin 1, “thickness direction” refers to the direction of the thickness of the product of the napkin 1, and “width direction” refers to the longitudinal direction. A lateral direction orthogonal to the direction and the thickness direction is shown. In the longitudinal direction, the direction on the stomach side of the user when the napkin 1 is used is “front”, and the direction on the back side of the user is “back”. Further, the thickness direction has a “skin side” that is in contact with the user's skin when the napkin 1 is used, and a “non-skin side” that is the opposite side.

  As shown in FIGS. 3A and 3B, the napkin 1 includes an absorbent body 2, a top sheet 3 that covers the absorbent body 2 from the skin side that is one side in the thickness direction of the absorbent body 2, and an absorbent body in the thickness direction. 2 and the top sheet 3, and a back sheet 5 provided on the non-skin side that is the other side in the thickness direction of the absorber 2. In the present embodiment, the back sheet 5 has two types of sheets, a main sheet 51 and a side sheet 52.

  Top sheet 3 and second sheet 4, absorbent body 2 and second sheet 4, absorbent body 2 and top sheet 3, top sheet 3 and back sheet 5, and main sheet 51 and side sheet 52 in back sheet 5 are hot-melt bonded. They are joined by an adhesive such as an agent. Examples of the adhesive application pattern include an Ω pattern, a spiral pattern, and a stripe pattern.

  In the following description, the joint between the top sheet 3 and the second sheet 4 is the first joint 11, the joint between the absorber 2 and the second sheet 4 is the second joint 12, and the absorber 2 and the top sheet 3. The joint portion is the third joint portion 13, the joint portion between the top sheet 3 and the back sheet 5 is the fourth joint portion 14, and the joint portion between the main sheet 51 and the side sheet 52 in the back sheet 5 is the fifth joint portion 15. The specific positional relationship between the first to fourth joint portions 11 to 14 will be described later.

  In this embodiment, as shown in FIGS. 1, 2, and 4, the outer edge of the napkin 1 is formed in a wave shape in which a plurality of arcs are connected. Moreover, the napkin 1 has the wing part 10 provided in order to mount and fix to underwear etc. at the time of use in the center of a longitudinal direction. The wing portion 10 has a substantially triangular shape extending so as to project outward in the width direction, and is provided on both sides in the width direction.

  In the longitudinal direction of the napkin 1, a region where the wing portion 10 is provided is a central region 1a, a region in front of the central region 1a is a front region 1b, and a region behind the central region 1a is a rear region 1c. In the case of a napkin that does not include the wing portion 10, a region corresponding to a region where the wing portion 10 is provided in the longitudinal direction is defined as a 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 more specifically with reference to FIG.

  In the wing part 10, the point located on the outermost side in the width direction is defined as a vertex 10a. When the inclination of the tangential line of the arc that is convex toward the napkin 1 among the plurality of arcs that form the outer edge of the napkin 1 from the apex 10a forward is viewed sequentially from the apex 10a side, A point on the arc where the inclination of the tangent line is parallel to the longitudinal direction for the first time is defined as a point 10b on the front side. In this case, a line connecting a pair of front-side points 10b arranged in the width direction is defined as a boundary line (front-side boundary line) between the central region 1a and the front region 1b, and a region ahead of the front-side boundary line is It becomes the front region 1b.

  Similarly, when the slopes of tangents of arcs convex toward the napkin 1 among the plurality of arcs that form the outer edge of the napkin 1 are connected to the rear from the apex 10a, in order from the apex 10a side Further, a point on the circular arc where the inclination of the tangent line is parallel to the longitudinal direction for the first time is defined as a rear point 10c. In this case, a line connecting a pair of rear-side points 10c arranged in the width direction is defined as a boundary line (rear-side boundary line) between the central region 1a and the rear region 1c, and a region behind the rear-side boundary line is It becomes the rear region 1c.

  Therefore, the region from the front boundary line to the rear boundary line in the longitudinal direction is the central region 1a. In FIG. 2, a tangent line at a pair of front points 10b and a tangent line at a pair of rear points 10c are indicated by two-dot chain lines, and a front boundary line and a rear boundary line are respectively indicated by one-dot chain lines.

  The absorbent body 2 is a member that absorbs liquid such as menstrual blood and holds it inside, and as shown in FIGS. 3A and 3B, an absorbent core 21 formed of pulp fibers that are liquid absorbent fibers and the like. For example, a cover sheet 22 formed of a soft material such as a tissue.

  The absorbent core 21 is harder and thicker than the top sheet 3, the second sheet 4, and the back sheet 5. As shown in FIG.1 and FIG.3A, the absorptive core 21 has the narrow part 210 narrowed inside the width direction in the center of a longitudinal direction. In the present embodiment, as shown in FIG. 1, the constricted portion 210 is provided in a range longer in the longitudinal direction than the central region 1 a, but is not limited thereto, and may be provided at least in the central region 1 a. . Moreover, the absorber 2 does not necessarily need to include the absorbent core 21 having the constricted portion 210.

  As shown in FIGS. 3A and 3B, the cover sheet 22 has both end portions in the width direction overlapping on the non-skin side in the thickness direction with the absorbent core 21 being wound inside. In this embodiment, since the absorptive core 21 has the constricted part 210, as shown to FIG. 3A, space exists between the cover sheet | seat 22 and the absorptive core 21 at least in the center area | region 1a. Yes.

The top sheet 3 is a member that transmits liquid such as menstrual blood, and is formed of a liquid-permeable nonwoven fabric or the like. In the present embodiment, as the top sheet 3, for example, thin fibers of 1.3 dtex to 2.2 dtex (preferably about 1.7 dtex) are 20 kg / m ^{3 to} 40 kg / m ³ (preferably 25 kg / m ^{3 to} 35 kg / m). A non-woven fabric bonded to a density of about ³ ) is used. Thereby, since the top sheet 3 has a softness and a soft and fluffy feel, the feel received by the skin is improved. Note that the top sheet 3 is not limited to this, and may be a member having at least liquid permeability.

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

  The tip 320a of the folded portion 32 is located between the absorber 2 and the back sheet 5 in the thickness direction. In the present embodiment, the distal end portion 320 including the distal end 320a extends toward the inner side (center side) in the width direction between the absorber 2 and the back sheet 5 in the thickness direction. The front end portion 320 is joined to the backsheet 5 by a pair of fourth joining portions 14 arranged in the width direction between the absorber 2 and the backsheet 5 in the thickness direction. Therefore, the top sheet 3 is joined to the back sheet 5 at the front end portion 320.

  The second sheet 4 is a member that transmits liquid such as menstrual blood like the top sheet 3 and is formed of a nonwoven fabric of liquid-permeable synthetic fibers. As shown in FIG. 3A and FIG. 3B, both end portions in the width direction of the second sheet 4 include folded regions 400, and the folded regions 400 are formed between the absorber 2 and the top sheet 3 in the width direction. Located between.

  In the present embodiment, both end portions of the second seat 4 include a region 400 that is folded over the entire center region 1a, front region 1b, and rear region 1c, and the folded region 400 has a width direction. In FIG. 4, the absorber 2 is located between the top sheet 3 and the absorber 2. However, the present invention is not limited to this, and it is only necessary that both end portions of the second sheet 4 are positioned between the absorber 2 and the top sheet 3 in the width direction at least in the central region 1a.

  The center region 1a is a region where the frequency of contact between the user's feet when wearing the napkin 1 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 applies a larger contact pressure to both feet than the top sheet 3 and the second sheet 4. It will be received from the absorber 2.

  In the present embodiment, at least in the central region 1a, both end portions in the width direction of the second sheet 4 are located between the absorber 2 top seas and 3 in the width direction. Before receiving the contact pressure, it is possible to receive the contact pressure from the folded portion 32 of the top sheet 3 softer than the absorbent body 2 and both ends of the second sheet 4 and to directly receive the contact pressure from the absorbent body 2. Therefore, it is possible to relieve the contact pressure from the absorbent body 2 received by both feet, and to suppress discomfort in the crotch, leading to improvement in the wearability of the napkin 1.

  Further, by providing the region 400 in which both end portions of the second sheet 4 are folded back, both feet can receive contact pressure from a region having a surface wider than both end surfaces of the second sheet 4. Compared with the case where the contact pressure is received from the surface (edge), the discomfort in the crotch is further suppressed.

  Furthermore, the absorbent body 2 has the constricted portion 210 so that the absorbent core 21 is confined at the inner side in the width direction at least in the central region 1a. Therefore, the width direction from the folded portion 32 of the topsheet 3 to the absorbent core 21 To prevent a situation where both the legs are subjected to the contact pressure from the absorbent core 21 immediately after receiving the contact pressure from the folded portions 32 of the top sheet 3 and both ends of the second sheet 4. It is possible to relieve the contact pressure from the absorbent core 21 received by both feet.

  As shown in FIGS. 3A and 3B, a gap S is provided between the tip 400 a of the folded region 400 that is the end in the width direction of the second sheet 4 and the absorbent core 21. In the present embodiment, the gap S is provided over the entire longitudinal direction of the central region 1a, the front region 1b, and the rear region 1c. However, the present invention is not limited to this, and the gap S may be provided at least in the central region 1a. That's fine. In addition, the gap S is not necessarily provided between the tip 400a of the second sheet 4 and the absorbent core 21, but it is desirable that the gap S is provided.

  This is because the napkin 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 top sheet 3 exists, the rigidity is lower than the region where the top sheet 3 and the second sheet 4 exist. Therefore, when a force in the width direction is applied from both feet in the central region 1a, only the top sheet 3 exists. Deformation occurs from the region. That is, the region where only the top sheet 3 exists is more likely to be deformed than the region where the top sheet 3 and the second sheet 4 exist.

  Therefore, the region where the top sheet 3 and the second sheet 4 existing on the skin side in the thickness direction are more likely to rise in the thickness direction than the region where only the top sheet 3 exists, and the contact pressure is increased from the entire rising surface. Therefore, the contact pressure from the top sheet 3 and the second sheet 4 received by both feet is relaxed, and the uncomfortable feeling in the crotch is 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 that are arranged in the width direction and extend in the longitudinal direction. Examples of the method for joining the top sheet 3 and the second sheet 4 include fusion bonding by pressure and pressure. As shown in FIGS. 1 and 3A, the pair of seal portions 6 are located outside the narrow portion 210 in the width direction at the position where the narrow portion 210 is provided. In FIG. 3A and FIG. 3B, a pair of seal | sticker part 6 is each shown with the sand. In addition, the pair of seal portions 6 is formed by a plurality of dot-shaped pressing portions, and in the present embodiment, the top sheet 3 and the second sheet 4 are fused in the pressing portions.

  As a result, both feet contact the pair of seal portions 6 in addition to the contact pressure from the folded portion 32 of the top sheet 3 and both ends of the second sheet 4 before receiving the contact pressure from the absorbent core 21. Since the pressure can be received and the contact pressure from the absorbent core 21 does not have to be received directly, the contact pressure from the absorbent core 21 received by both feet can be further relaxed.

  In addition, since the rigidity of the top sheet 3 and the second sheet 4 is increased at the position where the pair of seal portions 6 are provided, the pair of seal portions 6 is removed when both feet apply a force in the width direction to the napkin 1. As a starting point, the folded portion 32 of the top sheet 3 and both end portions of the second sheet 4 are likely to rise or fall in the thickness direction. As a result, both feet can receive contact pressure from the entire surface rising or falling in the thickness direction, so that the contact pressure from the top sheet 3 and the second seat 4 received by both feet is relieved. , The sense of discomfort in the crotch is further suppressed.

  It should be noted that the pair of seal portions 6 do not necessarily have to be positioned outside the narrow portion 210 in the width direction over the entire position where the narrow portion 210 is provided, but at least at the most narrow position of the narrow portion 210. What is necessary is just to be located in the outer side of the width direction of the part 210. FIG.

  As shown in FIGS. 3A and 3B, the absorbent body 2, the top sheet 3, and the second sheet 4 are squeezed and joined in the thickness direction by the first squeezing part 71 and the second squeezing part 72. As the said pressing method of the absorber 2, the top sheet 3, and the 2nd sheet | seat 4, a heat embossing process is mentioned, for example. In this embodiment, although the 1st pressing part 71 and the 2nd pressing part 72 are formed with several recessed parts located in a line with a fixed space | interval, it is not restricted to this, For example, when several recessed parts are located in a line continuously It may be formed in a groove shape.

  As shown in FIG. 1, a pair of first pressing parts 71 formed so as to extend in the longitudinal direction are provided side by side in the width direction at a position where the constricted part 210 is provided, and forward of the constricted part 210. Or the 2nd pressing part 72 formed in the heart shape is each provided in the back position.

  As shown in FIGS. 3A and 3B, both end portions of the second sheet 4 are located on the outer side in the width direction than the first pressing portion 71 and the second pressing portion 72. Therefore, since the both ends of the second sheet 4 are not joined to the absorber 2 and the top sheet 3 by the first pressing part 71 and the second pressing part 72, the second sheet 4 has an increased degree of fiber freedom at both ends. An uncomfortable feeling between the groins is further suppressed by improving the feel received by both feet. In FIG. 3A and FIG. 3B, the 1st pressing part 71 and the 2nd pressing part 72 are shown with the shading.

  In the present embodiment, as shown in FIG. 1, the distance L1 from the outer edge in the width direction of the absorbent core 21 to the fold line 32b of the top sheet 3 is It is longer than the distance L2 from the outer edge in the width direction to the outer edge in the width direction of the first pressing portion 71. Thereby, since the part which is not joined by the 1st pressing part 71 in the top sheet 3 and the 2nd sheet | seat 4, ie, the part with a large freedom degree of a fiber increases in the outer side of the width direction rather than the absorptive core 21, both legs receive. The feel is improved and the discomfort in the crotch is further suppressed.

  As shown in FIGS. 3A and 3B, the back sheet 5 is formed by joining a main sheet 51 and a pair of side sheets 52 in the thickness direction by a fifth joining portion 15. 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 is formed of a soft nonwoven fabric or the like, and is provided on the skin side in the thickness direction with respect to the main sheet 51. More specifically, the pair of side sheets 52 is disposed between the front end portion 320 of the folded 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 portion 32 of the top sheet 3 by the pair of fourth joining portions 14. The pair of fourth joint portions 14 are located on the inner side in the width direction with respect to the folding line 32 b in the top sheet 3.

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

  As described above, since the top sheet 3 and the back sheet 5 are joined by the pair of fourth joint portions 14 located on the inner side in the width direction than the folding line 32b in the top sheet 3, the pair of fourth sheets The top sheet 3 and the back sheet 5 are not joined in the thickness direction outside the joining portion 14 in the width direction. Therefore, the extended portion of the back sheet 5 that forms the wing portion 10 is not joined to the top sheet 3. Accordingly, when the wing portion 10, that is, the extended portion of the back sheet 5 is bent to the non-skin side in the thickness direction and attached to the underwear, the top sheet 3 is pulled by the back sheet 5. By avoiding this, it is possible to suppress a sense of discomfort in the crotch when the napkin 1 is worn.

  Note that the wing portion 10 is not necessarily formed by the main sheet 51 and the side sheet 52, and the side sheet 52 extends outward in the width direction from the folded portion 32 of the top sheet 3 at least in the central region 1a. The wing part 10 should just be formed by being formed.

  As shown in FIG. 2, on the non-skin side surface of the main sheet 51, a band-shaped main body adhesive portion 16 a extending in the longitudinal direction is provided at a portion corresponding to the flat portion 31 (see FIG. 1) of the top sheet 3. The wing adhesive portion 16 b is provided in a portion corresponding to the pair of wing portions 10. When the napkin 1 is used, the main body adhesive portion 16a is attached to the inside of the crotch portion of the underwear, and the pair of wing portions 10 are bent to the non-skin side and the pair of wing adhesive portions 16b are attached to the outside of the crotch portion. Then, fix the napkin 1 to the underwear.

<About the positional relationship between the first to fourth joint portions 11 to 14>
Next, the positional relationship between the first to fourth joint portions 11 to 14 will be described with reference to FIGS. 3A, 3 </ b> B, and 4.

  FIG. 4 is a schematic plan view showing the positional relationship between the pair of fourth central 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, a joint part that joins any two members of the absorber 2, the top sheet 3, the second sheet 4, and the back sheet 5, that is, the first to fourth joint parts 11 to 11. 14 is located on the inner side in the width direction than the folding line 32 b in the top sheet 3. Thereby, since the freedom degree of a fiber increases in the folding | returning part 32 of the top sheet 3, the feeling which both feet receive at the time of use of the napkin 1 becomes good, and the discomfort to a crotch is suppressed. In addition, the 1st-4th junction parts 11-14 do not necessarily need to be located in the inner side of the width direction rather than the folding line 32b in the top sheet 3. FIG.

  Further, the first joint portion 11 that joins the top sheet 3 and the second sheet 4 in the thickness direction is located on the inner side in the width direction than both end portions of the second sheet 4. Therefore, since the top sheet 3 and the second sheet 4 are not joined in the thickness direction at the folded portion 32 of the top sheet 3 and the both ends of the second sheet 4, the degree of freedom of the fibers is increased, and the napkin 1 is used. The feeling that both feet receive is improved, and the discomfort in the crotch is further suppressed.

  As shown in FIG. 3A, FIG. 3B, and FIG. 4, the pair of fourth joints 14 that join the top sheet 3 and the back sheet 5 in the thickness direction includes a central region 1a, a front region 1b, and a rear region 1c. Are provided in each of the three regions. In the following description, the pair of fourth joints 14 in the center region 1a is referred to as a pair of fourth center joints 14a, the pair of fourth joints 14 in the front region 1b is referred to as a pair of fourth front joints 14b, and the rear The pair of fourth joints 14 in the region 1c is referred to as a pair of fourth rear joints 14c.

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

  Therefore, as shown in FIG. 4, at least a part of 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 center joint portions 14a is longitudinal. It overlaps with. On the central region 1a side where both feet are in high contact, the positions of the pair of fourth front joint portions 14b and the pair of fourth rear joint portions 14c and the positions of the pair of fourth center joint portions 14a are in the longitudinal direction. By overlapping, even when a force in the width direction is applied from both feet when the napkin 1 is worn, the bonding between the top sheet 3 and the back sheet 5 becomes difficult to peel off.

  In addition, even if a part of the position of a pair of 4th front junction part 14b and the position of a pair of 4th back junction part 14c and the position of a pair of 4th center junction part 14a overlaps like this embodiment. For example, the pair of fourth central joint portions 14a are provided over the entire longitudinal direction of the napkin 1, and the positions of the pair of fourth front joint portions 14b and the pair of fourth rear joint portions 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 14 b has an end 140 b on the central region 1 a side, which is an inner end in the longitudinal direction, at the front in the constricted portion 210 of the absorbent core 21 in the longitudinal direction. It is arranged at the side constriction start position 210b. Similarly, in the pair of fourth rear joining portions 14c, the end 140c on the central region 1a side, which is the inner end in the longitudinal direction, is arranged at the rearward side constriction start position 210c in the constricted portion 210 in the longitudinal direction. Yes.

  In this embodiment, the ends 140b of the pair of fourth front joint portions 14b are disposed at the front side constriction start position 210b, and the ends 140c of the pair of fourth rear joint portions 14c are disposed at the rear side constriction start position 210c. However, the present invention is not limited to this, and the ends 140b of the pair of fourth front joint portions 14b are located on the inner side (center side) of the front side constriction start position 210b, and the ends 140c of the pair of fourth rear joint portions 14c are rearward. It may be arranged on the inner side (center side) than the side constriction start position 210c.

  Thereby, since the end 140b of a pair of 4th front junction part 14b and the end 140c of a pair of 4th back junction part 14c are located in the area | region in which the constriction part 210 is provided, the constriction part 210 at the time of wear of the napkin 1 Even when a force in the width direction is applied from both feet to the portion where the top sheet 3 is provided, the bonding between the top sheet 3 and the back sheet 5 becomes more difficult to peel off.

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

  As shown in FIGS. 3A, 3B, and 4, the pair of fourth front joints 14b and the pair of fourth rear joints 14c are located on the outer side in the width direction than the pair of fourth center joints 14a. ing. In other words, the pair of fourth center joint portions 14a is located on the inner side in the width direction than the pair of fourth front joint portions 14b and the pair of fourth rear joint portions 14c.

  Accordingly, in the central region 1a where the frequency of contact between both feet is high, the pair of fourth central joint portions 14a is located on the inner side in the width direction than the pair of fourth front joint portions 14b and the fourth rear joint portion 14c. As a result, a portion corresponding to the folded portion 32 in the top sheet 3 can be secured in a wide area. Therefore, both feet receive contact pressure from a wider surface of the top sheet 3 that is softer than the absorber 2 before receiving contact pressure from the absorber 2, and contact from the absorber 2 that both feet receive. The pressure is relieved, leading to a sense of discomfort in the crotch.

  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 positioned on the outer side in the width direction than the pair of fourth central joint portions 14a. Securing the planar shape of the planar portion 31 (see FIGS. 1, 3A, and 3B) of the top sheet 3 that is the skin-side surface that absorbs liquid such as menstrual blood to further secure the liquid absorption area This leads to suppression of liquid leakage.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

1 ... Napkin (absorbent article)
DESCRIPTION OF SYMBOLS 1a ... Central area | region 1b ... Front area | region 1c ... Back area | region 2 ... Absorber 3 ... Top sheet 4 ... Second sheet 5 ... Back sheet 6 ... Seal part 11 ... 1st junction part (joint part)
14, 14a, 14b, 14c ... 4th junction part (a pair of junction parts)
21 ... Absorbent core 32 ... Folded portion 52 ... Side sheets 140b, 140c ... Ends on the central region side (inner ends)
210 ... the constricted portions 210b and 210c ... the constricted start position 320 ... the distal end portion 400 ... the folded region 400a ... the distal end S ... the gap

Claims (10)

Having a longitudinal direction, a width direction, and a thickness direction;
An absorber that absorbs the liquid;
A top sheet covering the absorber from one side of the absorber in the thickness direction;
An absorbent article comprising a back sheet provided on the other side of the absorbent body in the thickness direction,
The top sheet has folded portions that are folded on both sides in the width direction,
The tip of the folded portion is joined to the backsheet by a pair of joints arranged in the width direction between the absorber and the backsheet in the thickness direction,
The said pair of said junction part in the front area | region of the said longitudinal direction and back area | region is located in the outer side of the said width direction rather than the said pair of said junction part in the center area | region of the said longitudinal direction. Goods. The absorbent article according to claim 1,
The absorbent article characterized in that a part of the position of the pair of joint portions in the front region and the rear region overlaps the position of the pair of joint portions in the central region in the longitudinal direction. . The absorbent article according to claim 1 or 2,
The absorbent article includes an absorbent core having a constricted portion constricted inside in the width direction at least in the central region. The absorbent article according to claim 3,
The inner ends of the pair of joint portions of at least one of the front region and the rear region are disposed inside the constricted start position of the constricted portion or the constricted start position in the longitudinal direction. An absorbent article characterized by having It is an absorptive article given in any 1 paragraph of Claims 1-4,
In the center region, the back sheet has a side sheet formed to extend outward in the width direction from the folded portion of the top sheet. An absorbent article according to any one of claims 1 to 5,
Further comprising a second sheet between the absorber and the top sheet in the thickness direction,
At least in the central region in the longitudinal direction, both end portions in the width direction of the second sheet are located between the absorbent body and the top sheet in the width direction. The absorbent article according to claim 6,
The absorbent body includes an absorbent core having a constricted portion constricted inside in the width direction at least in the central region,
The absorbent article, wherein a gap is provided between the end of the second sheet in the width direction and the absorbent core in the central region. The absorbent article according to claim 7,
The absorbent article according to claim 2, wherein the both end portions of the second sheet are provided with regions folded toward the absorber. The absorbent article according to any one of claims 6 to 8,
An absorptive article, wherein a joined portion that joins the top sheet and the second sheet in the thickness direction is located on the inner side in the width direction than the both end portions of the second sheet. The absorbent article according to any one of claims 6 to 9,
The absorbent body includes an absorbent core having a constricted portion constricted inside in the width direction at least in the central region,
The top sheet and the second sheet are squeezed and joined in the thickness direction by a squeezing part on both sides in the width direction,
The said pressing part is located in the outer side of the said width direction of the said narrow part at least in the position where the said narrow part was most narrowed, The absorbent article characterized by the above-mentioned.

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