absorbent articles

Abstract

To provide an absorbent article less likely to be twisted.SOLUTION: An absorbent article 1 has a constricted shape including an article narrow part 1n and article wide parts 1w, comprises side sheets 7 including a pair of side flap parts S and disposed on the skin-facing surface side of a top sheet 2. The top sheet 2 and the side sheets 7 are bonded by first bonding parts 21 located outward in a lateral direction Y with respect to side edges 5e of an absorber 5; the absorber 5 and the top sheet 2 are bonded with a first adhesive 11; and the absorber 5 and a backside sheet 3 are bonded with a second adhesive 12, where the first adhesive 11 and the second adhesive 12 at least in the article wide parts 1w, extend outward in the lateral direction Y from both side edges 5e along a longitudinal direction X of the absorber 5, and the first adhesive 11 and the second adhesive 12 are brought into contact with each other in the at least article wide parts 1w.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Absorbent articles such as sanitary napkins and incontinence pads generally have an absorbent body, a topsheet arranged on the skin-facing side of the absorbent body, and a backsheet arranged on the non-skin-facing side of the absorbent body (see Patent Documents 1 to 3). In the absorbent article of Patent Document 1, the skin-facing side of the absorbent body and the topsheet are joined with a hot melt adhesive, and the non-skin-facing side of the absorbent body and the backsheet are joined with a hot melt adhesive. In the absorbent articles of Patent Documents 2 and 3, the topsheet and backsheet are fused together widthwise outward of the absorbent body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-24060 [Patent Document 2] Japanese Patent Application Publication No. 2019-171026 [Patent Document 3] Japanese Patent Publication No. 2020-68887 Summary of the Invention [Problem to be solved by the invention]

[0004] In a conventional absorbent article, as shown in FIG. 6, an absorbent body 83 is disposed between a top sheet 81 and a back sheet 82, resulting in a step 85 between a portion 81a of the top sheet 81 that overlaps the absorbent body 83 in the thickness direction and a portion 81b of the top sheet 81 that extends beyond the absorbent body 83. When this step 85 occurs, the top sheet 81 and the back sheet 82 are not easily joined near the side edge 83e of the absorbent body 83, making the top sheet 81 more likely to peel off and float away from the back sheet 82. If the top sheet floats away from the back sheet near the side edge of the absorbent body, the top sheet may shift due to, for example, the wearer's movements, causing the absorbent article to become twisted. This problem can also occur in the absorbent articles described in Patent Documents 1 to 3.

[0005] In detail, in the absorbent article of Patent Document 1, the top sheet and the back sheet are not joined near the side edges of the absorbent body, and the top sheet floats above the back sheet. In Patent Documents 2 and 3, the top sheet and the back sheet are fused to each other laterally outward from the absorbent body, but the fusion of the two sheets is performed at a position away from the side edges of the absorbent body, and similarly to Patent Documents 1 and 2, the top sheet and the back sheet are not joined near the side edges of the absorbent body, and the top sheet floats above the back sheet. Therefore, an object of the present invention is to provide an absorbent article that can overcome the drawbacks of the prior art described above. [Means for solving the problem]

[0006] The present invention has a longitudinal direction and a transverse direction, An absorbent article having an absorbent body, a top sheet arranged on the skin-facing side of the absorbent body, and a back sheet arranged on the non-skin-facing side of the absorbent body, The absorbent article has a waisted shape including a narrow article width portion having a relatively short length in the lateral direction of the absorbent article, and wide article width portions located on both sides of the narrow article width portion in the longitudinal direction and having a relatively long length in the lateral direction, The absorbent body has a pair of side flap portions extending outward in the horizontal direction from both side edges along the vertical direction, The top sheet has side sheets arranged on the skin-facing side of each of both side portions along the longitudinal direction, the wide article portion has a longer extension length from the side edge of the absorbent body in the side flap portion than the narrow article portion; the top sheet and the side sheets are joined at first joining portions located laterally outward from side edges of the absorbent body along the longitudinal direction, The absorbent body and the topsheet are joined by a first adhesive, The absorbent body and the backsheet are joined by a second adhesive, the first adhesive and the second adhesive extend outward in the lateral direction from both side edges of the absorbent body along the longitudinal direction at least in the article wide portion; The absorbent article is provided in which the first adhesive and the second adhesive are in contact with each other at least in the wide portion of the article. [Effects of the Invention]

[0007] According to the present invention, an absorbent article that is less likely to wrinkle is provided. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view schematically illustrating the skin-facing surface of one embodiment of an absorbent article according to the present invention. [Figure 2] FIG. 2(a) is a plan view schematically showing the non-skin-facing surface of the absorbent article shown in FIG. 1, and FIG. 2(b) is an enlarged view of a main part of FIG. 2(a). [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is a plan view schematically showing the positional relationship between the first joining portion, the second joining portion, the first adhesive agent, and the second adhesive agent in the absorbent article shown in FIG. [Figure 5]FIG. 5 is a perspective view schematically illustrating the absorbent article shown in FIG. 1 folded in three. [Figure 6] FIG. 6 is a cross-sectional view that schematically shows a conventional absorbent article, and corresponds to FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on preferred embodiments with reference to the drawings. Figure 1 shows an absorbent article 1 that is a preferred embodiment of the present invention.

[0010] Any absorbent article known in the art can be used without any particular limitation as the absorbent article 1. Examples of such absorbent articles include sanitary napkins, incontinence pads, and panty liners. The absorbent article 1 shown in Fig. 1 has a longitudinal direction X and a transverse direction Y perpendicular to the longitudinal direction X. The longitudinal direction X corresponds to the front-to-back direction of a wearer. The absorbent article 1 has a shape that is long in the longitudinal direction X.

[0011] As shown in Fig. 1, the absorbent article 1 has a first end 1a at one end in the longitudinal direction X and a second end 1b at the other end in the longitudinal direction X. The absorbent article 1 also includes a crotch portion C that is located in the crotch region of a wearer when the absorbent article 1 is worn, a ventral portion A extending forward in the longitudinal direction X from the crotch portion C, and a dorsal portion B extending backward in the longitudinal direction X from the crotch portion C. The ventral portion A is located on the ventral side of the wearer when the absorbent article 1 is worn. The dorsal portion B is located on the dorsal side of the wearer when the absorbent article 1 is worn. In the embodiment shown in Fig. 1, the first end 1a is located in the ventral portion A, and the second end 1b is located in the dorsal portion B.

[0012] 1, the absorbent article 1 has a waisted shape including a narrow article portion 1n that is relatively short in the lateral direction Y of the absorbent article 1, and a wide article portion 1w that is relatively long in the lateral direction Y of the absorbent article 1. The wide article portions 1w are located on both sides of the narrow article portion 1n in the longitudinal direction X. In this embodiment, the narrow article portion 1n is located in the center of the absorbent article 1 in the longitudinal direction X. The centers of both side edges of the absorbent article 1 along the longitudinal direction X are curved inward in the lateral direction Y.

[0013] As shown in Fig. 3, the absorbent article 1 has an absorbent body 5, a topsheet 2 arranged on the skin-facing side of the absorbent body 5, and a backsheet 3 arranged on the non-skin-facing side of the absorbent body 5. The absorbent body 5 and the topsheet 2 are joined together with a first adhesive 11. The absorbent body 5 and the backsheet 3 are joined together with a second adhesive 12. The absorbent article 1 has anti-slip portions 6 on the non-skin-facing surface of the backsheet 3 for fixing the absorbent article 1 to the wearer's clothing.

[0014] As shown in Fig. 1, the absorbent article 1 has side sheets 7 arranged on the skin-facing side of each of both side portions of the topsheet 2 along the longitudinal direction X. The topsheet 2 and the side sheets 7 are joined at first joining portions 21. The first joining portions 21 are located outward in the lateral direction Y from the side edges 5e of the absorbent body 5 along the longitudinal direction X. The side sheets 7 extend in the longitudinal direction X. Elastic members (not shown) may be arranged along the free end portions 7a of the side sheets 7 to form leak-proof cuffs that can stand up toward the wearer. The free end portions 7a of the side sheets 7 do not necessarily have to be arranged with elastic members.

[0015] 1 and 3, the absorbent article 1 has a pair of side flap portions S, S extending outward in the lateral direction Y from both side edges 5e, 5e of the absorbent body 5 along the longitudinal direction X. In this embodiment, the topsheet 2 and the backsheet 3 extend outward in the lateral direction Y from both side edges 5e, 5e of the absorbent body 5. The side flap portion S is composed of the topsheet 2, the backsheet 3, and the side sheet 7.

[0016] The side flap portions S extend in the longitudinal direction X. When viewed along the longitudinal direction X, the side flap portions S vary in extension length from the side edges 5e of the absorbent body 5. Specifically, the side flap portions S extend longer in the wide article portion 1w than in the narrow article portion 1n.

[0017] In the absorbent article 1, as shown in Figures 3 and 4, the first adhesive 11 and the second adhesive 12 extend outward in the horizontal direction Y from both side edges 5e, 5e along the longitudinal direction X of the absorbent body 5 at least in the article wide portion 1w. The first adhesive 11 and the second adhesive 12 are in contact with each other at least in the article wide portion 1w. The region marked with diagonal lines slanting downward to the right in Figure 4 is the region where the first adhesive 11 is applied. The region marked with diagonal lines slanting downward to the left in the same figure is the region where the second adhesive 12 is applied. The advantages of the first adhesive 11 and the second adhesive 12 extending from the side edges 5e of the absorbent body 5 and being in contact with each other are as follows.

[0018] As shown in FIG. 6 , in conventional absorbent articles, a step 85 occurs between a portion 81a of the topsheet 81 that overlaps the absorber 83 in the thickness direction and a portion 81b of the topsheet 81 that extends beyond the absorber 83, potentially causing the topsheet 81 to lift off the backsheet 82 near the side edge 83e of the absorber 83. This problem is particularly pronounced in the wide article portion, where the extension from the side edge 83e of the absorber 83 is relatively long. However, in this embodiment, the first adhesive 11 and the second adhesive 12 extend from the side edge 5e of the absorber 5 and are in contact with each other at least in the wide article portion 1w, thereby bonding the topsheet 2 and the backsheet 3 near the side edge 5e. This prevents the topsheet 2 from peeling off from the backsheet 3 and lifting up, making the topsheet 2 less likely to slip, even when the wearer moves, for example. Therefore, the absorbent article 1 of this embodiment is less likely to wrinkle.

[0019] In order to achieve the above-mentioned effects more significantly, it is preferable that the first adhesive 11 and the second adhesive 12 extend from the side edges 5e of the absorbent body 5 and be in contact with each other not only in the wide article portion 1w but also in the narrow article portion 1n, and it is more preferable that the first adhesive 11 and the second adhesive 12 extend from the side edges 5e of the absorbent body 5 and be in contact with each other throughout the entire area of ​​the vertical direction X of the side flap portion S.

[0020] In order to achieve the above-mentioned effects more significantly, the ratio L1 / D of the length L1 in the horizontal direction Y of the first adhesive 11 to the length D in the horizontal direction Y of the absorbent body 5 is preferably 1.02 or more, more preferably 1.04 or more, even more preferably 1.10 or more, and is also preferably 1.80 or less, more preferably 1.70 or less, even more preferably 1.40 or less, and is also preferably 1.02 or more and 1.80 or less, more preferably 1.04 or more and 1.70 or less, even more preferably 1.10 or more and 1.40 or less.

[0021] From a similar viewpoint, the ratio L2 / D of the length L2 of the second adhesive 12 in the horizontal direction Y to the length D of the absorbent body 5 in the horizontal direction Y is preferably 1.02 or more, more preferably 1.20 or more, even more preferably 1.40 or more, and is preferably 2.00 or less, more preferably 1.90 or less, even more preferably 1.80 or less, and is preferably 1.02 or more and 2.00 or less, more preferably 1.20 or more and 1.90 or less, even more preferably 1.40 or more and 1.80 or less.

[0022] In this embodiment, as shown in Fig. 4, the first adhesive 11 and the second adhesive 12 are disposed over the entire area in the longitudinal direction X of the absorbent article 1. The first adhesive 11 is not disposed at either end of the absorbent article 1 in the lateral direction Y. The second adhesive 12 is disposed over the entire area in the lateral direction Y of the absorbent article 1. The length L1 of the first adhesive 11 in the lateral direction Y is shorter than the length L2 of the second adhesive 12 in the lateral direction Y.

[0023] In the absorbent article 1, first joints 21 joining the topsheet 2 and the sidesheets 7 are arranged on both side portions along the longitudinal direction X of the absorbent article 1, as shown in FIG. 1 . The first joints 21 are arranged on both the ventral portion A and the dorsal portion B. The first joints 21 extend along the side edges 5e of the absorbent body 5 in the longitudinal direction X. The positions of the outer edges of the first joints 21 in the longitudinal direction X coincide with the positions of the outer edges of the sidesheets 7. The first joints 21 extend inward in the longitudinal direction X in a strip shape.

[0024] 3 and 4, it is preferable that the end 11e of the first adhesive 11 in the lateral direction Y reaches the first joint 21 at least in the article wide portion 1w. This more effectively prevents the topsheet 2 from peeling off and floating away from the backsheet 3. The first adhesive 11 may extend beyond the first joint 21. In order to achieve the above-mentioned effect more significantly, it is preferable that the end 11e of the first adhesive 11 in the horizontal direction Y reaches the first joint 21 not only in the wide article portion 1w but also in the narrow article portion 1n, and it is more preferable that the end 11e of the first adhesive 11 in the horizontal direction Y reaches the first joint 21 throughout the entire area of ​​the vertical direction X of the side flap portion S.

[0025] 1, 3, and 4, the absorbent article 1 has a second bonded portion 22 formed by joining together members located outward from the periphery of the absorbent body 5 in a ring shape along the periphery of the absorbent article 1. In this embodiment, the second bonded portion 22 is formed by joining together the side sheet 7, the top sheet 2, and the back sheet 3, for example.

[0026] 3 and 4, it is preferable that the end 11e of the first adhesive 11 in the lateral direction Y reaches the second joint 22 at least in the wide portion 1w of the article. This increases the rigidity of the side flap portions S, particularly the wide portion 1w of the article, and more effectively prevents the topsheet 2 from peeling off and floating away from the backsheet 3. The first adhesive 11 may extend beyond the second joint 22. In order to achieve the above-mentioned effect more significantly, it is preferable that the end 11e of the first adhesive 11 in the horizontal direction Y reaches the second joint 22 not only in the wide article portion 1w but also in the narrow article portion 1n, and it is more preferable that the end 11e of the first adhesive 11 in the horizontal direction Y reaches the second joint 22 throughout the entire area of ​​the vertical direction X of the side flap portion S.

[0027] The absorbent article 1 is folded along at least two fold lines extending in the horizontal direction Y, and is folded at least into thirds. As shown in Fig. 5, the absorbent article 1 is folded into thirds by being folded along two fold lines L1 and L2. In this embodiment, of the multiple fold lines that the absorbent article 1 has, the fold line that is located closest to the first end 1a in the vertical direction X is referred to as the first fold line L1, and the fold line that is located closest to the second end 1b in the vertical direction X is referred to as the second fold line L2.

[0028] The absorbent article 1 can be divided into multiple regions along the fold lines L1 and L2. Specifically, as shown in Figures 1 and 2(a), the region of the absorbent article 1 that is further outward in the longitudinal direction X from the first fold line L1 and the second fold line L2 is defined as an outer region, and the region between the first fold line L1 and the second fold line L2 is defined as a middle region Rc. The outer region includes a first end region Ra that is a region closer to the first end 1a than the first fold line L1, and a second end region Rb that is a region closer to the second end 1b than the second fold line L2. In this embodiment, the wide article portion 1w is located in each of the first end region Ra and the second end region Rb, and the narrow article portion 1n is located in the middle region Rc.

[0029] As shown in Figure 2(a), the slippage prevention portions 6 are arranged in each of the outer regions Ra, Rb and the intermediate region Rc. Each of the outer regions Ra, Rb and the intermediate region Rc has a plurality of slippage prevention portions 6. The slippage prevention portions 6 extend in one direction, more specifically, in the horizontal direction Y. The slippage prevention portions 6 are also arranged intermittently in an orthogonal direction perpendicular to the one direction in which the slippage prevention portions 6 extend, more specifically, in the vertical direction X.

[0030] The middle region Rc has a different arrangement pattern of the slip stoppers 6 from the outer regions Ra and Rb, and more specifically, from both the first end region Ra and the second end region Rb. A different arrangement pattern of the slip stoppers 6 includes cases where the arrangement of the slip stoppers 6 is different, cases where the shape of the slip stoppers 6 is different, or cases where both are different. In this embodiment, the slip stoppers 6 in the middle region Rc have a different length in the longitudinal direction X and a different shape from the slip stoppers 6 in the first end region Ra and the second end region Rb. Furthermore, as shown in FIG. 2(a), the first end region Ra and the second end region Rb have the same arrangement pattern of the slip stoppers 6.

[0031] In this embodiment, the slip prevention portions 6 in the first end region Ra are arranged in a single pattern. Specifically, all of the multiple slip prevention portions 6 in the first end region Ra have the same shape. The slip prevention portions 6 in the first end region Ra are arranged regularly, more specifically, at regular intervals in the longitudinal direction X. The centers of adjacent slip prevention portions 6 in the longitudinal direction X are aligned with each other in the lateral direction Y. The slip prevention portions 6 in the second end region Rb and the intermediate region Rc are also arranged in a single pattern, similar to the slip prevention portions 6 in the first end region Ra. Specifically, in the second end region Rb, slip prevention portions 6 of the same shape are arranged at regular intervals in the longitudinal direction X, with the centers of the slip prevention portions 6 in the lateral direction Y aligned with each other. In the intermediate region Rc, slip prevention portions 6 of the same shape are arranged at regular intervals in the longitudinal direction X, with the centers of the slip prevention portions 6 in the lateral direction Y aligned with each other. The anti-slip portions 6 in the first end region Ra, the second end region Rb, and the intermediate region Rc are each arranged in a single pattern, which more significantly reduces the likelihood of twisting.

[0032] As long as the slip stoppers 6 in each region Ra, Rb, Rc are arranged in a single arrangement pattern, the arrangement patterns of the slip stoppers 6 in the first end region Ra, second end region Rb, and intermediate region Rc may be the same or different. From the perspective of more significantly achieving the effect of preventing twisting, it is preferable that the arrangement patterns of the slip stoppers 6 in the first end region Ra and second end region Rb are the same, and that the arrangement pattern of the slip stoppers 6 in the intermediate region Rc is different from both the first end region Ra and the second end region Rb.

[0033] The area of ​​the anti-slip portion 6 per unit area in the anti-slip portion arrangement region is larger in the wide article portion 1w than in the narrow article portion 1n. The area of ​​the anti-slip portion 6 per unit area in the anti-slip portion arrangement region can be calculated by dividing the total area of ​​the anti-slip portions 6 arranged in each portion 1w, 1n by the area of ​​the anti-slip portion arrangement region in that portion 1w, 1n. The anti-slip portion arrangement region will be described in detail below.

[0034] The slip stopper arrangement area is a substantially rectangular area surrounded by four imaginary lines. The slip stopper arrangement area Ta in the wide article portion 1w located in the first end region Ra (hereinafter also referred to as the "first slip stopper arrangement area") is a substantially rectangular area surrounded by imaginary lines F1 to F4, as shown in Figures 2(a) and 2(b). The imaginary line F1 is a imaginary line that passes through the first end 1a-side end of the slip stopper 6 located closest to the first end 1a among the slip stoppers 6 located in the wide article portion 1w in the first end region Ra. The imaginary line F2 is a imaginary line that passes through the first fold line L1-side end of the slip stopper 6 located closest to the first fold line L1 among the slip stoppers 6 located in the wide article portion 1w in the first end region Ra. When the absorbent article 1 is folded so that the first fold line L1 passes over a slip prevention portion 6, an imaginary line passing through the end of the slip prevention portion 6 located closer to the first end portion 1a than the first fold line L1 and closest to the slip prevention portion 6 on the first fold line L1 side is defined as imaginary line F2. Imaginary line F3 is an imaginary line passing through one end of the slip prevention portion 6 located furthest to one side in the lateral direction Y among the slip prevention portions 6 arranged in the article wide portion 1w in the first end region Ra. Imaginary line F4 is an imaginary line passing through the other end of the slip prevention portion 6 located furthest to the other side in the lateral direction Y among the slip prevention portions 6 arranged in the article wide portion 1w in the first end region Ra. Imaginary lines F1 and F2 extend parallel to the lateral direction Y. Imaginary lines F3 and F4 extend parallel to the longitudinal direction X.

[0035] The slip stopper arrangement region Tb (hereinafter also referred to as the "second slip stopper arrangement region") in the wide article portion 1w located in the second end region Rb is a substantially rectangular region surrounded by imaginary lines G1 to G4, as shown in FIG. 2(a). The imaginary line G1 is an imaginary line that passes through the end of the slip stopper 6 closest to the second end 1b among the slip stoppers 6 arranged in the wide article portion 1w in the second end region Rb. The imaginary line G2 is an imaginary line that passes through the end of the slip stopper 6 closest to the second fold line L2 among the slip stoppers 6 arranged in the wide article portion 1w in the second end region Rb. When the absorbent article 1 is folded so that the second fold line L2 passes over a slip prevention portion 6, the imaginary line passing through the end of the slip prevention portion 6 located closer to the second end portion 1b than the second fold line L2 and closest to the slip prevention portion 6 on the second fold line L2 side is defined as imaginary line G2. Imaginary line G3 is an imaginary line passing through one end of the slip prevention portion 6 located furthest to one side in the lateral direction Y among the slip prevention portions 6 arranged in the article wide portion 1w in the second end region Rb. Imaginary line G4 is an imaginary line passing through the other end of the slip prevention portion 6 located furthest to the other side in the lateral direction Y among the slip prevention portions 6 arranged in the article wide portion 1w in the second end region Rb. Imaginary lines G1 and G2 extend parallel to the lateral direction Y. Imaginary lines G3 and G4 extend parallel to the longitudinal direction X.

[0036] As shown in Figure 2(a), the slip stopper arrangement region Tc (hereinafter also referred to as the "intermediate slip stopper arrangement region") in the narrow article portion 1n located in the intermediate region Rc is a substantially rectangular region surrounded by imaginary lines H1 to H4. Imaginary line H1 is an imaginary line that passes through the end of the slip stopper 6 closest to the first fold line L1, of the slip stoppers 6 arranged in the narrow article portion 1n in the intermediate region Rc, on the first fold line L1 side. When the absorbent article 1 is folded so that the first fold line L1 passes over the slip stopper 6, the imaginary line that passes through the end of the slip stopper 6 closest to the first fold line L1, which is located closer to the second end 1b than the first fold line L1, is defined as imaginary line H1. Imaginary line H2 is an imaginary line that passes through the end of the slip prevention portion 6 closest to the second fold line L2, among the slip prevention portions 6 arranged in the narrow article portion 1n in the intermediate region Rc. When the absorbent article 1 is folded so that the second fold line L2 passes over the slip prevention portion 6, the imaginary line that passes through the end of the slip prevention portion 6 closest to the second fold line L2, which is located closer to the first end portion 1a than the second fold line L2, is defined as imaginary line H2. Imaginary line H3 is an imaginary line that passes through one end of the slip prevention portion 6 that is closest to the first end portion 1a in the lateral direction Y, among the slip prevention portions 6 arranged in the narrow article portion 1n in the intermediate region Rc. Imaginary line H4 is an imaginary line that passes through the other end of the slip prevention portion 6 that is closest to the other end in the lateral direction Y, among the slip prevention portions 6 arranged in the narrow article portion 1n in the intermediate region Rc. The imaginary lines H1 and H2 extend parallel to the horizontal direction Y. The imaginary lines H3 and H4 extend parallel to the vertical direction X.

[0037] The advantages of having the above-mentioned relationship between the area of ​​the slip prevention portion 6 per unit area in the slip prevention portion arrangement region between the wide article portion 1w and the narrow article portion 1n are as follows: As described above, the absorbent article 1 of this embodiment is folded in thirds along the fold lines L1, L2, and therefore when the absorbent article 1 folded in thirds is unfolded, creases may be formed at the positions of the fold lines L1, L2, and the first end region Ra and second end region Rb, where the wide article portion 1w is arranged, may tend to rise up toward the skin-facing surface. Even if the first end region Ra and the second end region Rb of the absorbent article 1 tend to rise up toward the skin-facing surface, the area of ​​the slip stopper 6 per unit area in the slip stopper arrangement regions Ta, Tb of the wide portion 1w of the article is larger than the area of ​​the slip stopper 6 per unit area in the slip stopper arrangement region Tc of the narrow portion 1n of the article, so the wide portion 1w of the article can be firmly fixed to the inside of the underwear and the end region Ra, Rb can be prevented from rising up. Therefore, the absorbent article 1 of this embodiment can be prevented from peeling off and turning up from the underwear, making it easy to wear the absorbent article 1 in an appropriate state.

[0038] In order to prevent the absorbent article 1 from peeling off and turning up from the underwear, it is conceivable to increase the area of ​​the slip stoppers 6 per unit area in the slip stopper arrangement region not only in the wide article portion 1w but also in the narrow article portion 1n. However, increasing the area of ​​the slip stoppers 6 per unit area in the slip stopper arrangement region reduces the breathability of the region where the slip stoppers 6 are present. Therefore, increasing the area of ​​the slip stoppers 6 per unit area in the slip stopper arrangement region in all regions of the wide article portion 1w and the narrow article portion 1n would significantly reduce the breathability of the absorbent article 1. In contrast, the absorbent article 1 of this embodiment has a relatively small area of ​​the slip stoppers 6 per unit area in the slip stopper arrangement region Tc of the narrow article portion 1n, which prevents a decrease in breathability in the intermediate region Rc. Therefore, the absorbent article 1 of this embodiment can also maintain breathability. In this way, the absorbent article 1 of this embodiment can achieve both resistance to curling and breathability.

[0039] In order to more significantly achieve the effect of achieving both resistance to curling and breathability, the ratio Sa / Sc of the area Sa of the slippage prevention portion 6 per unit area in the slippage prevention portion arrangement region Ta of the first end region Ra to the area Sc of the slippage prevention portion 6 per unit area in the slippage prevention portion arrangement region Tc of the intermediate region Rc is preferably 1.1 or more, more preferably 1.3 or more, even more preferably 1.5 or more, and is preferably 6.0 or less, more preferably 5.0 or less, even more preferably 4.0 or less, and is preferably 1.1 or more and 6.0 or less, more preferably 1.3 or more and 5.0 or less, even more preferably 1.5 or more and 4.0 or less.

[0040] From the same viewpoint, the ratio Sb / Sc of the area Sb of the slip stopper 6 per unit area in the slip stopper-arrangement region Tb of the second end region Rb to the area Sc of the slip stopper 6 per unit area in the slip stopper-arrangement region Tc of the intermediate region Rc is preferably 1.1 or more, more preferably 1.3 or more, even more preferably 1.5 or more, and is preferably 6.0 or less, more preferably 5.0 or less, even more preferably 4.0 or less, and is preferably 1.1 to 6.0, more preferably 1.3 to 5.0, even more preferably 1.5 to 4.0. The area Sa of the slip stopper 6 per unit area in the slip stopper-arrangement region Ta of the first end region Ra and the area Sb of the slip stopper 6 per unit area in the slip stopper-arrangement region Tb of the second end region Rb may be the same or different.

[0041] In the absorbent article 1, it is preferable that the average area of ​​the plurality of slip prevention portions 6 arranged in the article wide portion 1w, 1n is larger than that of the article narrow portion 1n. This allows the end region Ra, Rb to be more firmly fixed to the inside of the underwear, more effectively preventing the absorbent article 1 from peeling off and turning up from the underwear, making it easier to wear the absorbent article 1 in an appropriate state. Furthermore, because the average area of ​​the plurality of slip prevention portions 6 arranged in the middle region Rc is relatively small, it is possible to effectively prevent a decrease in the breathability of the middle region Rc, and the breathability of the absorbent article 1 is more easily maintained.

[0042] In order to achieve the above-mentioned effects more significantly, the ratio Pa / Pc of the average area Pa of the multiple slip prevention portions 6 in the first end region Ra to the average area Pc of the multiple slip prevention portions 6 in the intermediate region Rc is preferably 1.1 or more, more preferably 1.3 or more, even more preferably 1.5 or more, preferably 5.0 or less, more preferably 4.0 or less, even more preferably 3.0 or less, preferably 1.1 or more and 5.0 or less, more preferably 1.3 or more and 4.0 or less, even more preferably 1.5 or more and 3.0 or less.

[0043] From a similar viewpoint, the ratio Pb / Pc of the average area Pb of the plurality of slip prevention portions 6 in the second end region Rb to the average area Pc of the plurality of slip prevention portions 6 in the intermediate region Rc is preferably 1.1 or more, more preferably 1.3 or more, even more preferably 1.5 or more, and is preferably 5.0 or less, more preferably 4.0 or less, even more preferably 3.0 or less, and is preferably 1.1 or more and 5.0 or less, more preferably 1.3 or more and 4.0 or less, even more preferably 1.5 or more and 3.0 or less. The average area Pa of the plurality of slip prevention portions 6 in the first end region Ra and the average area Pb of the plurality of slip prevention portions 6 in the second end region Rb may be the same or different.

[0044] In this embodiment, the slip prevention portions 6 may extend outside the area where the absorbent body 5 is present in a plan view. For example, in at least the article wide portion 1w, the slip prevention portions 6 may extend from both side edges 5e of the absorbent body 5 in the lateral direction Y, as shown in Fig. 2(a). This makes it possible to further increase the adhesion area between the absorbent article 1 and the underwear, thereby more effectively preventing the absorbent article 1 from peeling off and turning up from the underwear, and making it even easier to wear the absorbent article 1 in an appropriate state.

[0045] In this embodiment, the slip prevention portions 6 may extend outside the area where the absorbent body 5 is present in a plan view not only in the wide article portion 1w but also in the narrow article portion 1n, or may extend outside the area where the absorbent body 5 is present in a plan view throughout the entire length of the side flap portion S in the longitudinal direction X. From the perspective of more easily achieving both resistance to curling and breathability, it is preferable that the slip prevention portions 6 extend outside the area where the absorbent body 5 is present in a plan view in the first end region Ra and the second end region Rb.

[0046] Next, the constituent materials of the absorbent article 1 will be described. The topsheet 2 can be a liquid-permeable sheet, such as a nonwoven fabric or a perforated film. The topsheet 2 may have an uneven surface on its skin-facing side. For example, a plurality of scattered convex portions can be formed on the skin-facing side of the topsheet 2. Alternatively, ridges and grooves extending in one direction can be formed alternately on the skin-facing side of the topsheet 2. For such purposes, the topsheet 2 can be formed using two or more sheets of nonwoven fabric.

[0047] The backsheet 3 may be made of, for example, a liquid-impermeable film or a spunbond, meltblown, or spunbond laminated nonwoven fabric. A plurality of micropores may be formed in the liquid-impermeable film to impart water vapor permeability to the film. To further improve the feel of the absorbent article, a sheet with a pleasant texture, such as a nonwoven fabric, may be laminated on the outer surface of the backsheet 3.

[0048] The absorbent body 5 has an absorbent core. The absorbent core is composed of, for example, a stack of hydrophilic fibers such as cellulose, including pulp, a mixed stack of the hydrophilic fibers and an absorbent polymer, or a pile of absorbent polymer. At least the skin-facing surface of the absorbent core may be covered with a liquid-permeable core wrap sheet, or the entire surface including the skin-facing surface and non-skin-facing surface may be covered with the core wrap sheet. Examples of the core wrap sheet that can be used include tissue paper made of hydrophilic fibers and liquid-permeable nonwoven fabric.

[0049] The absorbent body 5 may also be primarily an absorbent sheet, which is a sheet-like absorbent body. The absorbent sheet typically comprises a fiber sheet primarily made of a fiber material such as wood pulp, and a water-absorbing material such as an absorbent polymer fixed to the interior or surface of the fiber sheet. The absorbent sheet may have a configuration in which absorbent polymer particles are interposed between two opposing sheets.

[0050] A hot melt adhesive can be used as the first adhesive 11 and the second adhesive 12. The first adhesive 11 and the second adhesive 12 may be the same or different.

[0051] The first and second bonding portions 21 and 22 may be formed by fusing the members that make up the bonding portions 21 and 22 together using heat, ultrasonic waves, or the like.

[0052] Although the present invention has been described above based on the preferred embodiments, the scope of the present invention is not limited to the above embodiments.

[0053] For example, in the absorbent article 1 of the present embodiment, the first adhesive 11 and the second adhesive 12 are disposed over the entire area in the longitudinal direction X of the absorbent article 1, but instead, the first adhesive 11 and the second adhesive 12 may be disposed over only a portion of the area in the longitudinal direction X of the absorbent article 1. The first adhesive 11 may also be disposed over the entire area in the lateral direction Y of the absorbent article 1. The second adhesive 12 does not have to be disposed at both ends of the absorbent article 1 in the lateral direction Y. The length L1 of the first adhesive 11 in the lateral direction Y may be longer than the length L2 of the second adhesive 12 in the lateral direction Y.

[0054] For example, the application patterns of the first adhesive 11 and the second adhesive 12 are not particularly limited and may be, for example, spiral, stripe, omega, scattered, or a combination thereof. The application pattern of the first adhesive 11 and the application pattern of the second adhesive 12 may be the same or different.

[0055] In addition, in this embodiment, the first end region Ra, the second end region Rb, and the intermediate region Rc each have multiple slippage prevention portions 6, but each region Ra, Rb, and Rc may have only one slippage prevention portion 6.

[0056] In addition, in this embodiment, the plurality of anti-slip portions 6 are uniformly arranged in each of the regions Ra, Rb, and Rc, but the plurality of anti-slip portions 6 may be unevenly arranged in each of the regions Ra, Rb, and Rc. In other words, the plurality of anti-slip portions 6 in each of the regions Ra, Rb, and Rc may have different shapes. Furthermore, the plurality of anti-slip portions 6 in each of the regions Ra, Rb, and Rc may be irregularly arranged in each of the regions Ra, Rb, and Rc.

[0057] 2(a), the slippage prevention portions 6 extend in the horizontal direction Y and are arranged intermittently in the vertical direction X, but the shape and arrangement of the slippage prevention portions 6 are not limited to this. For example, the slippage prevention portions 6 may extend in the vertical direction X and be arranged intermittently in the horizontal direction Y, or may be arranged in a scattered manner in the planar direction.

[0058] Furthermore, the shape of the slippage prevention portion 6 in plan view is not particularly limited, and may be, for example, a square, rectangle, rhombus, triangle, polygon with pentagons or more, circle, ellipse, or star. [Explanation of symbols]

[0059] 1. Absorbent articles 1a 1st end 1b Second end 2 Surface sheet 3 Back sheet 5. Absorbent 6 Anti-slip part 7 Side seats 11 First Adhesive 12 Second adhesive 21 1st joint 22 2nd joint A. Ventral part B Dorsal part C Inseam L1 First fold line L2 Second fold line Ra 1st end area Rb 2nd end area Rc mid range X vertical direction Y horizontal direction

Claims

1. having a longitudinal direction and a transverse direction, An absorbent article having an absorbent body, a top sheet arranged on the skin-facing side of the absorbent body, and a back sheet arranged on the non-skin-facing side of the absorbent body, The absorbent article has a crotch portion that is located in the crotch region of a wearer when the absorbent article is worn, a ventral portion that extends forward in the longitudinal direction from the crotch portion, and a dorsal portion that extends backward in the longitudinal direction from the crotch portion, The absorbent article has a waisted shape including a narrow article width portion having a relatively short length in the lateral direction of the absorbent article, and wide article width portions located on both sides of the narrow article width portion in the longitudinal direction and having a relatively long length in the lateral direction, The absorbent body has a pair of side flap portions extending outward in the horizontal direction from both side edges along the vertical direction, The top sheet has side sheets arranged on the skin-facing side of each of both side portions along the longitudinal direction, the wide article portion has a longer extension length from the side edge of the absorbent body in the side flap portion than the narrow article portion; the topsheet and the sidesheet are joined at a first joining portion located outward in the horizontal direction from a side edge of the absorbent body along the vertical direction, The first joint portion is arranged on each of both side portions along the vertical direction of the ventral portion and the dorsal portion, The first joint portion extends in a band shape from the outer side to the inner side in the longitudinal direction, The side edges of the absorbent body along the longitudinal direction are linear, the side edge of the absorbent body along the longitudinal direction and the side edge of the first joint portion along the longitudinal direction are parallel to each other; The absorbent body and the topsheet are joined by a first adhesive, The absorbent body and the backsheet are joined by a second adhesive, the first adhesive and the second adhesive extend outward in the transverse direction from both side edges of the absorbent body along the longitudinal direction at least in the article wide portion; An absorbent article, wherein the first adhesive and the second adhesive are in contact with each other at least in the wide portion of the article.

2. The absorbent article according to claim 1 , wherein the first adhesive has outer ends in the lateral direction that extend to the first joining portion at least in the wide portion of the article.

3. a second joining portion formed by joining members located outward from the periphery of the absorbent body in a ring shape along the periphery of the absorbent article; The absorbent article according to claim 1 or 2, wherein the first adhesive has an outer end in the lateral direction that reaches the second bonding portion at least in the wide portion of the article.

4. The sheet is folded along at least two fold lines extending in the horizontal direction, and is folded at least in thirds; The backsheet has a slip prevention portion on a non-skin-facing surface thereof for fixing the absorbent article to the wearer's clothing, Among the folding lines, the folding lines located on both outermost sides in the vertical direction are defined as a first folding line and a second folding line, respectively; In the absorbent article, when a region on the outer side of the first fold line and the second fold line in the longitudinal direction is defined as an outer region, and a region located between the first fold line and the second fold line is defined as an intermediate region, The slippage prevention portion is disposed in each of the outer region and the middle region, The middle region has a different arrangement pattern of the slippage prevention portions from the outer region, 4. The absorbent article according to claim 1, wherein the area of ​​the slippage prevention portion per unit area in the slippage prevention portion arrangement region is larger in the wide article portion than in the narrow article portion.

5. The outer region and the intermediate region each have a plurality of the slippage prevention portions, The absorbent article according to claim 4 , wherein the outer region has a larger average area of ​​the plurality of slippage prevention portions arranged in the outer region than the intermediate region.

6. The absorbent article according to claim 4 or 5, wherein the slippage prevention portions extend from both side edges of the absorbent body in the lateral direction at least in the article wide portion.

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