Absorbent articles

Abstract

To provide an absorbent article that can effectively suppress the occurrence of urinary incontinence. [Solution] The absorbent article 1 comprises a surface sheet 21, a back sheet 22, an absorbent body 23 disposed between the surface sheet 21 and the back sheet 22 and including an absorbent core 31, and a pair of leak-proof gathers 25. When the leak-proof gathers 25 are folded inward in the width direction X, at the central position of the absorbent body 23 in the longitudinal direction Y, the edge 31c of the absorbent core 31 in the width direction X is located outside the top 25b of the leak-proof gathers 25 in the width direction X. The leak-proof gathers 25 include a liquid-impermeable film member 243 having at least a portion extending from the upright pivot point 25a toward the top 25b of the leak-proof gathers 25. The film member 243 extends at least 50% or more of the height from the upright pivot point 25a toward the top 25b at the central position of the absorbent body 23 in the longitudinal direction Y.

Description

[Technical Field]

[0001] This disclosure relates to absorbent articles. [Background technology]

[0002] Conventionally, absorbent articles are known that can prevent leakage of excrement by providing a pair of side absorbents on both sides of a central absorbent, and by making the pair of side absorbents stand up easily (see Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2013-102888 [Overview of the project] [Problems that the invention aims to solve]

[0004] In the absorbent material described above, if a large amount of urination occurs (for example, repeated urination due to prolonged use), there is a risk that the urine blocked by the leg-side gathers may seep out and leak from the sheet material that makes up the leg-side gathers.

[0005] This disclosure aims to provide an absorbent article that can effectively suppress the occurrence of urinary incontinence. [Means for solving the problem]

[0006] An absorbent article according to one embodiment comprises an ventral region located on the ventral side of the wearer when worn, a dorsal region located on the dorsal side of the wearer when worn, and a crotch region positioned between the ventral and dorsal regions in the longitudinal direction, the absorbent article comprising: a liquid-permeable surface sheet located on the skin side of the wearer when worn, a liquid-impermeable back sheet located on the non-skin side of the wearer when worn, an absorbent body including an absorbent core positioned between the surface sheet and the back sheet to absorb the wearer's excrement, and both ends in the longitudinal direction fixed to both sides of the absorbent body in the width direction perpendicular to the longitudinal direction. The material comprises a pair of leakproof gathers configured to be upright by the longitudinal contraction of the portion between the ends, wherein, with the leakproof gathers folded inward in the width direction, at the center of the absorbent in the longitudinal direction, the edge of the absorbent core in the width direction is located wider than the top of the leakproof gathers, and the leakproof gathers include a liquid-impermeable film member having at least a portion extending from the upright pivot point of the leakproof gathers toward the top of the leakproof gathers, the film member extending at least 50% of the height from the upright pivot point to the top at least at the center of the absorbent in the longitudinal direction.

[0007] The absorbent article described above exhibits an excellent urine leakage suppression effect through the synergistic action of the following two components. Firstly, the absorbent core has a wide shape that extends outward in the width direction beyond the top of the leak-proof gather at the center of the absorbent body in the longitudinal direction, thus securing a large absorption area and having high absorption capacity. Secondly, the leak-proof gather has a liquid-impermeable film member over a wide range of its rising height. This film member effectively functions as a leak-proof wall that delays the leakage of urine from the components of the leak-proof gather when urine that cannot be instantly absorbed by the absorbent core is blocked by the leak-proof gather. This ensures sufficient time for urine absorption in the absorbent core. In other words, while the film member delays the leakage of urine, the wide absorbent core can suitably absorb the urine that has been blocked by its high absorption capacity. As a result, even in the case of large amounts of urination, the occurrence of urine leakage can be effectively suppressed. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide an absorbent article that can effectively suppress the occurrence of urinary incontinence. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic perspective view showing an absorbent article according to one embodiment. [Figure 2] This is a plan view of an absorbent article as seen from the non-skin side. [Figure 3] This is a plan view of an absorbent material as seen from the skin-facing side. [Figure 4] Figure 3 is a schematic diagram of the cross-sectional structure of the absorbent material along the line IV-IV. [Figure 5] Figure 3 is a schematic diagram of the cross-sectional structure of the interior lining along the VV line. [Figure 6] Figure 3 is a schematic diagram of the cross-sectional structure of the interior lining along the line VI-VI. [Figure 7] This figure shows the first modified example of a leak-proof gather. [Figure 8] This figure shows a second modified example of the leak-proof gather. [Modes for carrying out the invention]

[0010] This specification and the accompanying drawings will make at least the following aspects clear.

[0011] [1] An absorbent article having an abdominal region located on the ventral side of the wearer when worn, a dorsal region located on the dorsal side of the wearer when worn, and a crotch region positioned between the abdominal region and the dorsal region in the longitudinal direction, A liquid-permeable surface sheet located on the skin side of the wearer in the aforementioned wearing state, In the aforementioned wearing state, a liquid-impermeable back sheet is located on the side of the wearer that is not directly against their skin, An absorber including an absorbent core disposed between the front sheet and the back sheet, which absorbs excrement of the wearer. A pair of leak-preventing gathers provided on both sides of the absorber in the width direction perpendicular to the longitudinal direction, with both ends in the longitudinal direction fixed and the portion between the both ends configured to be able to stand up by shrinking in the longitudinal direction. In a state where the leak-preventing gathers are folded inward in the width direction, at the central position of the absorber in the longitudinal direction, the edge of the absorbent core in the width direction is located outside the width direction than the top of the leak-preventing gathers. The leak-preventing gathers include a liquid-impermeable film member having at least a portion extending from the standing pivot point of the leak-preventing gathers toward the top of the leak-preventing gathers. The film member extends over at least 50% of the height from the standing pivot point to the top at the central position of the absorber in the longitudinal direction. An absorbent article.

[0012] According to the absorbent article, the following two configurations act synergistically to exhibit an excellent urine leakage suppressing effect. First, the absorbent core has a wide shape that spreads outside the width direction than the top of the leak-preventing gathers at the central position of the absorber in the longitudinal direction, so as to secure a wide absorption area and have a high absorption capacity. Second, the leak-preventing gathers have a liquid-impermeable film member over a wide range of their rising height. When the film member dams up urine that cannot be instantaneously absorbed by the absorbent core with the leak-preventing gathers, it effectively functions as a leak-preventing wall that delays the leakage of urine to the outside from the components of the leak-preventing gathers. Thereby, the time for urine absorption in the absorbent core can be secured. That is, while the film member delays the leakage of urine, the wide absorbent core can suitably absorb the urine dammed up by its high absorption capacity. As a result, even when there is a large amount of urination, the occurrence of urine leakage can be effectively suppressed.

[0013] [2] The absorbent article of [1] wherein the film member extends at least 70% or more of the height from the upright pivot point to the top of the absorbent at the central position of the absorbent in the longitudinal direction.

[0014] According to the above configuration, the function of the aforementioned film member as a leak-proof barrier can be performed more effectively.

[0015] [3] The absorbent article of [1] wherein the film member extends from the upright pivot point to the top of the absorbent at least at the central position of the absorbent in the longitudinal direction.

[0016] With the above configuration, by extending the film member to the top of the leak-proof gather, the function of the film member as a leak-proof wall can be maximized.

[0017] [4] The leak-proof gather comprises a sheet member that overlaps with the film member and constitutes the top portion, and an elastic member fixed to the sheet member so as to be expandable and contractible in the longitudinal direction, The absorbent article [1] or [2] wherein the top end of the film member is located on the upright support side of the position where the elastic member is provided.

[0018] If there is an overlapping portion between the film member and the elastic member, the film member may expand and contract together with the elastic member in that portion, resulting in the film member becoming cohesive and creating a stiffer (rougher) area compared to other parts. This may impair the wearer's comfort. In contrast, by using a configuration that prevents the film member from reaching the position where the elastic member is provided, as described above, the occurrence of the aforementioned problem can be prevented.

[0019] [5] The portion of the leak-proof gather in the range from the upright pivot point to the top portion in which the film member exists includes the film member and two or more sheet members, an absorbent article of any of [1] to [4].

[0020] According to the above configuration, by constructing the portion of the leak-proof gather that includes the film material (i.e., the portion that primarily functions as a leak-proof wall) with three or more layers, the function of the leak-proof wall can be effectively enhanced.

[0021] [6] The absorbent article according to [5], wherein the two or more sheet members include a first nonwoven fabric sheet facing one surface of the film member and a second nonwoven fabric sheet facing the other surface of the film member.

[0022] According to the above configuration, the film material included in the leak-proof gather is prevented from being exposed to the outside, and the part that comes into contact with the wearer's skin is made of nonwoven fabric (first nonwoven fabric sheet and second nonwoven fabric sheet), thereby improving the wearer's comfort (skin feel of the leak-proof gather).

[0023] [7] Further comprising an outer gather formed by at least a portion of the two or more sheet members, The outer gather is composed of a portion of the leak-proof gather that is folded outward at the top and extends further, and the absorbent article has an elastic member that expands and contracts in the longitudinal direction, one of [1] to [6].

[0024] According to the above configuration, by providing an outer gather that extends beyond the top of the leak-proof gather and is folded outwards, the outer gather can cover the outside of the leak-proof gather. With this two-tiered configuration of a leak-proof gather and an outer gather, even if urine seeps outside the leak-proof gather, leakage of urine to the outside can be suppressed even more effectively.

[0025] [8] The film member has a basis weight of 18 g / m2 or less, and is an absorbent article of any of [1] to [7].

[0026] According to the above configuration, by keeping the basis weight to 18g / m2 or less and ensuring the flexibility of the film material, it is possible to provide the wearer with a comfortable fit.

[0027] [9] The moisture permeability of the film member is 5 g / m 2 ·day or more 500g / m 2 • An absorbent item of any of the following types [1] to [8] that is less than or equal to one day.

[0028] According to the above configuration, not only can urine seep out of the leak-proof gather (the part where the film material is provided), but moisture can also be prevented from escaping to the outside. This prevents the outer surface of the absorbent material from getting wet due to moisture discharged to the outside of the leak-proof gather.

[0029]

[10] The moisture permeability of the film member is 500 g / m 2 • Larger than day, 7000g / m² 2 • An absorbent item of any of the following types [1] to [8] that is less than or equal to one day.

[0030] According to the above configuration, it is possible to suppress the seepage of urine in the leak-proof gather (the part where the film material is provided) while allowing moisture from sweat etc. to escape to the outside, thereby reducing stuffiness. This provides the wearer with a comfortable fit.

[0031]

[11] An absorbent article of any of [1] to

[10] wherein at least the portion of the film member extending from the upright support point toward the top is colored with a color other than white.

[0032] The above configuration makes it possible to improve the visibility of the film component included in the leak-proof gather. This allows users to see the colored portion of the film component when replacing absorbent items, thus providing users with a sense of security regarding the leak-proof function.

[0033]

[12] The absorbent has a colored region that is colored in a color other than white, overlapping with at least a portion of the absorbent core, including the edge, in the thickness direction perpendicular to the longitudinal and width directions, The absorbent article of

[11] , wherein, when each of the pair of leak-proof gathers is extended outward in the width direction so as to be aligned with the width direction, the distance between the tops of each of the pair of leak-proof gathers in an extended state is defined as the first distance, the sum of the lengths of the film member and the colored area in the width direction in a region along the width direction that passes through the central position of the absorbent in the longitudinal direction is 1 / 3 or more of the first distance.

[0034] According to the above configuration, when viewing the inside of an absorbent article from the front of the area where the absorbent core is located, a wide area of ​​the absorbent core and leak-proof gathers related to leak prevention can be made more visible through coloring, thereby providing the user with a sense of visual reassurance.

[0035]

[13] The absorbent has a colored region that is colored in a color other than white, overlapping with at least a portion of the absorbent core, including the edge, in the thickness direction perpendicular to the longitudinal and width directions, An absorbent article

[11] or

[12] in which the L value in the Lab color system of the colored region is smaller than the L value in the Lab color system of the colored portion of the film member.

[0036] With the above configuration, the absorbent core, which has an absorption function, is made conspicuous with a dark color, while the leak-proof gather (film component), which has a similar function (leak-proof function), is made conspicuous with a lighter color than the absorbent core. This allows the components related to leak prevention to be conspicuous in an appropriate balance, and provides the user with a suitable sense of visual reassurance.

[0037] [Embodiment] Embodiments of this disclosure will be described in detail below with reference to the drawings. In the following description, the same reference numerals will be used for identical or equivalent elements, and redundant explanations will be omitted. The drawings may be simplified or exaggerated in part for ease of understanding, and the dimensional ratios are not limited to those shown in the drawings.

[0038] The following describes an absorbent article 1 according to one embodiment. Figure 1 is a perspective view of the absorbent article 1. Figure 2 is a plan view of the absorbent article 1 as seen from the non-skin side Z2, and Figure 3 is a plan view of the absorbent article 1 as seen from the skin side Z1. Figure 4 is a schematic diagram of the cross-sectional structure of the absorbent article 1 along the line IV-IV in Figure 3. Figure 5 is a schematic diagram of the cross-sectional structure of the inner lining 20 along the line VV in Figure 3, schematically showing the state in which the leak-proof gather 25, which will be described later, is slightly raised. Figure 6 is a schematic diagram of the cross-sectional structure of the inner lining 20 along the line VI-VI in Figure 3.

[0039] In the following description, "wearer" refers to the person wearing absorbent article 1. "Skin-facing side" refers to the side of absorbent article 1 that faces the wearer's skin when it is worn by the wearer (hereinafter referred to as "wearing state"). "Non-skin-facing side" refers to the side that faces away from the wearer's skin when worn. The "user" of absorbent article 1 includes the wearer as described above, as well as assistants (caregivers / caregivers) who raise or care for the wearer, who is a child or person receiving care.

[0040] As shown in Figure 1, as an example, absorbent article 1 is a pant-type disposable diaper that absorbs the wearer's urine and other excretions. Specifically, absorbent article 1 has a waist opening H1 through which the wearer's torso passes, and a pair of leg openings H2 through which the wearer's legs pass (Figure 1 shows the leg opening H2 through which the left leg passes). Absorbent article 1 is composed of an outer body 10 that faces outward (non-skin side Z2) when worn, and an inner body 20 fixed to the inside of the outer body 10. Specifically, absorbent article 1 is a two-piece configuration consisting of an outer body 10 and an inner body 20. However, the configuration of absorbent article 1 is not limited to the above. For example, absorbent article 1 may be a three-piece configuration in which the outer body 10 is divided into a dorsal portion and a ventral portion, and each of the dorsal portion and the ventral portion is joined to the inner body 20. The absorbent article 1 is configured to be cut by tearing a pair of side seal portions 10a of the outer casing 10, which are provided on both the left and right sides of the wearer.

[0041] Figures 2 and 3 show the absorbent article 1 in an unfolded state, after the outer casing 10 has been cut along a pair of side seal portions 10a and the absorbent article 1 has been stretched to a state in which no wrinkles are formed. In the following description, unless otherwise specified, the shape and positional relationship of each part of the absorbent article 1 in the unfolded state will be described.

[0042] As shown in Figures 2 and 3, the absorbent article 1 has a configuration in which a ventral region 1a located on the ventral side of the wearer when worn, a dorsal region 1b located on the dorsal side of the wearer when worn, and a crotch region 1c located between the ventral region 1a and the dorsal region 1b are provided along the longitudinal direction Y.

[0043] The absorbent article 1 extends in the width direction X and the longitudinal direction Y when unfolded. The longitudinal direction Y is the direction in which the ventral region 1a, the crotch region 1c, and the dorsal region 1b are aligned. When unfolded, the longitudinal direction Y is the direction in which the ventral region 1a and the dorsal region 1b face each other with the crotch region 1c in between. The width direction X is perpendicular to the longitudinal direction Y and corresponds to the left-right direction of the wearer when worn. The thickness direction Z is perpendicular to both the width direction X and the longitudinal direction Y and is the direction in which the outer body 10 and the inner body 20 overlap each other. In the following description, the side of the absorbent article 1 where the ventral region 1a is located in the longitudinal direction Y may simply be referred to as the "ventral side," and the side where the dorsal region 1b is located in the longitudinal direction Y may simply be referred to as the "dorsal side."

[0044] In this embodiment, when the absorbent article 1 is a pant-type diaper, the ventral region 1a is defined as the portion of the absorbent article 1 that, in the unfolded state (see Figures 2 and 3), includes the area from the ventral end 10b of the outer casing 10 to the dorsal end of the ventral side seal portion 10a. Similarly, the dorsal region 1b is defined as the portion of the absorbent article 1 that, in the unfolded state, includes the area from the dorsal end 10c of the outer casing 10 to the ventral end of the dorsal side seal portion 10a. If the absorbent article 1 has a configuration other than a pant-type diaper (for example, a tape-type diaper or an absorbent pad), the ventral region 1a and the dorsal region 1b may be defined by other methods. For example, if the entire absorbent article 1 is divided into four equal parts in the longitudinal direction Y, the two central regions may be defined as the crotch region 1c, and the regions on either side of it may be defined as the ventral region 1a and the dorsal region 1b.

[0045] (Outer structure) As shown in Figures 2 to 4, the outer casing 10 comprises a main sheet 11, a ventral sheet 12, and a dorsal sheet 13. For example, the main sheet 11 is a sheet member that defines the overall outer shape of the outer casing 10 as viewed from the thickness direction Z (in this embodiment, an hourglass shape as an example). The ventral sheet 12 is arranged to overlap with the main sheet 11 in the ventral region 1a. The dorsal sheet 13 is arranged to overlap with the main sheet 11 in the dorsal region 1b. The main sheet 11 is formed of, for example, SMS nonwoven fabric. The ventral sheet 12 and the dorsal sheet 13 are formed of, for example, spunbond nonwoven fabric.

[0046] The ventral sheet 12 is folded back so as to sandwich the ventral end 11a of the main sheet 11. That is, the ventral sheet 12 has an inner portion 121 located on the inside (skin side Z1) of the main sheet 11 and an outer portion 122 located on the non-skin side Z2 (outside) of the main sheet 11.

[0047] The folded inner portion 121a is located dorsal to the ventral end 20a of the inner body 20, and ventral to the ventral end 31a of the absorbent core 31 contained in the inner body 20.

[0048] The folded outer portion 122a extends further dorsally than the outer portion 121a of the inner portion 121. Between the outer portion 122 and the main sheet 11 in the ventral region 1a, a plurality (19 in this embodiment) of abdominal stretch members 14 are arranged along the longitudinal direction Y. As shown in Figure 2, each abdominal stretch member 14 extends parallel to the width direction X between the edges 1d in the width direction X of the ventral region 1a of the absorbent article 1. Therefore, the ventral waist portion of the outer casing 10 stretches in the width direction X while fitting to the wearer's waist. The plurality of abdominal stretch members 14 are made of an elastic material such as elastic thread or spandex.

[0049] The back sheet 13 is folded back so as to sandwich the back end 11b of the main sheet 11. That is, the back sheet 13 has an inner portion 131 located inside (skin-facing side Z1) of the main sheet 11, and an outer portion 132 located outside (non-skin-facing side Z2) of the main sheet 11.

[0050] The folded inner portion 131a is located ventrally to the dorsal end 20b of the inner body 20, and dorsal to the dorsal end 31b of the absorbent core 31 contained in the inner body 20.

[0051] The folded outer portion 132a extends further ventrally than the outer portion 131a of the inner portion 131. Between the outer portion 132 and the main sheet 11 in the dorsal region 1b, a plurality (15 in this embodiment) of back-circumference stretch members 15 are arranged along the longitudinal direction Y. As shown in Figure 2, each back-circumference stretch member 15 extends parallel to the width direction X between the edges 1e in the width direction X of the dorsal region 1b of the absorbent article 1. Therefore, the dorsal waist portion of the outer casing 10 also stretches in the width direction X while fitting the wearer's waist, similar to the ventral waist portion where the above-described waist-circumference stretch member 14 is provided. The plurality of back-circumference stretch members 15 are made of an elastic material such as elastic thread or spandex.

[0052] Between the outer portion 132 and the main sheet 11, multiple (three in this embodiment) leg-around stretch members 16 are arranged along the longitudinal direction Y, ventrally side of the multiple back-around stretch members 15. As shown in Figure 2, each leg-around stretch member 16 extends in the width direction X between the edges 1e of the dorsal region 1b of the absorbent article 1, and includes a portion that extends in a curved shape along the edges of each dorsal portion of the pair of leg openings H2. The multiple leg-around stretch members 16 allow the outer body 10 to stretch to fit the wearer's legs. The multiple leg-around stretch members 16 are made of an elastic material such as elastic thread or spandex.

[0053] The inner portion 121 of the ventral sheet 12 and the inner body 20 are bonded to each other by a hot-melt adhesive (not shown) placed between the inner portion 121 and the inner body 20. Similarly, the outer portion 122 of the ventral sheet 12 and the main sheet 11 are bonded to each other by a hot-melt adhesive (not shown) placed between the outer portion 122 and the main sheet 11, sandwiching the multiple abdominal stretch members 14 between them. Likewise, the inner portion 131 of the dorsal sheet 13 and the inner body 20 are bonded to each other by a hot-melt adhesive (not shown) placed between the inner portion 131 and the inner body 20. Furthermore, the outer portion 132 of the dorsal sheet 13 and the main sheet 11 are bonded to each other by a hot-melt adhesive (not shown) placed between the outer portion 132 and the main sheet 11, sandwiching the multiple dorsal stretch members 15 and multiple leg stretch members 16 between them. Furthermore, the main sheet 11 and the inner lining 20 are bonded to each other by a hot-melt adhesive (not shown) placed between the main sheet 11 and the inner lining 20 (back sheet 22). As described above, the absorbent article 1 has a structure in which the outer lining 10 and the inner lining 20 are integrally joined together.

[0054] (Interior structure) As shown in Figures 2, 3, 5, and 6, the interior body 20 has a rectangular shape, extending in the longitudinal direction Y and the width direction X when viewed from the thickness direction Z, with the length in the longitudinal direction Y being longer than the length in the width direction X. The interior body 20 includes a surface sheet 21, a back sheet 22, an absorbent 23, and a pair of side sheets 24.

[0055] The surface sheet 21 is located on the skin side Z1 of the wearer when worn, and constitutes the surface that comes into contact with the wearer's skin. The surface sheet 21 is made of a liquid-permeable nonwoven fabric such as spunbond nonwoven fabric, and covers the absorbent material 23 from the skin side Z1. Typically, the surface sheet 21 is white and plain. The surface sheet 21 is adhered to the skin side Z1 surface of the absorbent material 23 (the surface of the white tissue 32 and colored tissue 33 described later) by, for example, a hot melt adhesive (not shown).

[0056] The back sheet 22 is a sheet located on the non-skin side Z2 of the wearer when worn. Specifically, the back sheet 22 is located on the opposite side from the front sheet 21, with the absorbent material 23 in between. The back sheet 22 is made of, for example, a liquid-impermeable film and covers the absorbent material 23 from the non-skin side Z2. The back sheet 22 is bonded to the surface of the non-skin side Z2 of the absorbent material 23 by, for example, a hot-melt adhesive (not shown).

[0057] The absorbent body 23 is positioned between the surface sheet 21 and the back sheet 22 of the inner lining 20. As shown in Figure 5, the absorbent body 23 includes an absorbent core 31 that absorbs excretions such as urine from the wearer that have permeated the surface sheet 21, a pair of white tissues 32 that cover the skin-facing side Z1 of the absorbent core 31, a pair of colored tissues 33 placed on the pair of white tissues 32, and a white tissue 34 that covers the non-skin-facing side Z2 of the absorbent core 31. The pair of white tissues 32 and white tissues 34 are a so-called core wrap.

[0058] The width (length in the width direction X) of the absorbent material 23 (absorbent core 31) is approximately the same as the width of the inner lining 20. The length (length in the longitudinal direction Y) of the absorbent material 23 (absorbent core 31) is slightly shorter than the length of the inner lining 20. Specifically, the ventral end 31a of the absorbent core 31 is located dorsally to the ventral end 20a of the inner lining 20 (surface sheet 21, etc.). Also, the dorsal end 31b of the absorbent core 31 is located ventrally to the dorsal end 20b of the inner lining 20 (surface sheet 21, etc.).

[0059] The absorbent core 31 is laminated on a white tissue 34. The absorbent core 31 contains, for example, pulp fibers and a superabsorbent polymer (SAP) to absorb the wearer's urine. As the pulp of the absorbent core 31, for example, chemical pulp, cellulose fibers such as rayon and acetate can be used. As the superabsorbent polymer, for example, particulate or fibrous polymers based on starch, acrylic acid, or amino acids can be used.

[0060] A pair of white tissues 32 are arranged to cover the skin-facing side Z1 of the absorbent core 31. For example, each pair of white tissues 32 extends from the outer edge of the absorbent core 31 in the width direction X to the center in the width direction X, and is arranged to overlap each other in the center in the width direction X. Each of the pair of white tissues 32 is formed in a rectangular shape, extending from the ventral end 31a to the dorsal end 31b of the absorbent core 31 when viewed from the thickness direction Z. That is, the edge of each white tissue 32 in the longitudinal direction Y overlaps with the edge of the absorbent core 31 (ventral end 31a and dorsal end 31b) in the longitudinal direction Y.

[0061] The pair of colored tissues 33 are tissues colored with a color other than white (for example, blue). The pair of colored tissues 33 are arranged on both sides of a center line CL1 that passes through the center of the absorbent body 23 (absorbent core 31) in the width direction X and is parallel to the longitudinal direction Y, so as to overlap with the absorbent core 31 in the thickness direction Z. The outer edges 33a of each of the pair of colored tissues 33 in the width direction X are arranged to overlap with the edge 31c of the absorbent core 31 in the width direction X. Each of the pair of colored tissues 33 is formed in a rectangular shape that extends from the ventral edge 31a to the dorsal edge 31b of the absorbent core 31 when viewed from the thickness direction Z. That is, the edge 33b of each colored tissue 33 in the longitudinal direction Y (see Figure 3) overlaps with the edge (ventral edge 31a and dorsal edge 31b) of the absorbent core 31 in the longitudinal direction Y.

[0062] Here, as described above, the surface sheet 21 is a liquid-permeable nonwoven fabric, so the color of the material on the non-skin side Z2 of the surface sheet 21 is visible through the skin side Z1 of the surface sheet 21. Therefore, it is possible to see the individual colors of the pair of colored tissues 33 from the skin side Z1. That is, as shown in Figure 3, a pair of colored regions A1 are formed by the pair of colored tissues 33. Furthermore, on the same side of the absorbent core 31 where the pair of colored regions A1 are provided (in this embodiment, the skin side Z1), an uncolored region A2 is formed between the pair of colored regions A1 in the width direction X.

[0063] Colored area A1 is the area where the colored tissue 33 is placed, and when viewed from the skin-side Z1 of the surface sheet 21, the color of the colored tissue 33 (blue in this embodiment) is visible through the area. Uncolored area A2 is the area where the colored tissue 33 is not placed, and when viewed from the skin-side Z1 of the surface sheet 21, the white (uncolored) white of the white tissue 32 is visible through the area. In other words, in this embodiment, the colored tissue 33 functions as a component constituting colored area A1, and the white tissue 32 mainly functions as a component constituting uncolored area A2 (white area).

[0064] As an example, at the central position of the absorber 23 in the longitudinal direction Y (on the center line CL2), the sum of the widths w1 of the pair of colored regions A1 in the width direction X (w1 × 2) may be greater than or equal to the width (w2) of the uncolored region A2 in the width direction X. That is, the width w1 of the pair of colored regions A1 may be set such that "w1 × 2 ≥ w2" holds true. With the above configuration, by making the width of the pair of colored regions A1 sufficiently larger than the uncolored region A2, the visibility of the pair of colored regions A1 can be effectively improved.

[0065] A pair of side sheets 24 are provided at both ends of the inner body 20 in the width direction X. The pair of side sheets 24 form a pair of leak-proof gathers 25 to prevent urine and other excrement excreted by the wearer from leaking in the width direction X (lateral leakage). The pair of leak-proof gathers 25 are provided on both sides of the absorbent body 23 in the width direction X, and both ends (fixed area FA) in the longitudinal direction Y are fixed, and the portion between the fixed areas FA is configured to be able to stand up by contracting in the longitudinal direction Y. As shown in Figure 5, in this embodiment, each leak-proof gather 25 is configured to be able to stand up with the portion along the end of the absorbent body 23 in the width direction X as the upright support point 25a.

[0066] As an example, the leak-proof gather 25 has a structure in which one or more elastic members 26 extending in the longitudinal direction Y are arranged inside the side sheet 24 which is folded back into a bag shape. As an example, the one or more elastic members 26 include a first elastic member 26a provided at an intermediate position of the leak-proof gather 25 and a second elastic member 26b provided at the top 25b of the leak-proof gather 25. Note that in Figure 3, only one of the two elastic members 26 (first elastic member 26a) included in each leak-proof gather 25 shown in Figure 5 is illustrated. When such an elastic member 26 contracts in the longitudinal direction Y, the portion of the side sheet 24 placed between the fixed areas FA functions as a leak-proof gather 25. The elastic member 26 is made of an elastic material such as elastic thread or flat elastic. The elastic member 26 is fixed to the inner sheet 241 or outer sheet 242, which will be described later, by hot melt adhesive or the like.

[0067] As shown in Figure 5, the side sheet 24 has an inner sheet 241 (first nonwoven fabric sheet), an outer sheet 242 (second nonwoven fabric sheet), and a film member 243 provided between the inner sheet 241 and the outer sheet 242. The inner sheet 241 and the outer sheet 242 are made of liquid-permeable nonwoven fabric. The film member 243 is made of liquid-impermeable film. In this embodiment, the inner sheet 241 and the outer sheet 242 are made up of a single continuous member by being folded back into a bag shape. However, the inner sheet 241 and the outer sheet 242 may be made up of two separate sheets that are joined together.

[0068] The inner sheet 241 covers a portion of the non-skin side Z2 of the back sheet 22 and extends to the skin side Z1 beyond the surface sheet 21, wrapping around the side of the absorbent 23. The outer sheet 242 is positioned outside the inner sheet 241. Similar to the inner sheet 241, the outer sheet 242 covers a portion of the non-skin side Z2 of the back sheet 22 and extends to the skin side Z1 beyond the surface sheet 21, wrapping around the side of the absorbent 23. The film member 243 is sandwiched between the inner sheet 241 and the outer sheet 242. Similar to the inner sheet 241 and the outer sheet 242, the film member 243 covers a portion of the non-skin side Z2 of the back sheet 22 and extends to the skin side Z1 beyond the surface sheet 21, wrapping around the side of the absorbent 23.

[0069] As shown in Figure 5, the film member 243 includes a portion that constitutes the leak-proof gather 25, at least along the center line CL2. That is, the film member 243 has a portion that extends from the upright support point 25a toward the top 25b of the leak-proof gather 25. In this embodiment, the film member 243 extends at least along the center line CL2 for more than 50% of the height from the upright support point 25a toward the top 25b. That is, the dimensional relationship "L≧H / 2" holds between the length L of the film member 243 constituting the leak-proof gather 25 and the height H from the upright support point 25a toward the top 25b.

[0070] In this embodiment, the inner sheet 241 and the outer sheet 242 extend further than the top 25b of the leak-proof gather 25, forming an outer gather 27. That is, the outer gather 27 is composed of the portions of the inner sheet 241 and the outer sheet 242 that are folded outward at the top 25b of the leak-proof gather 25 and extend further. The outer gather 27 has one or more (four in this embodiment) elastic members 28 that expand and contract in the longitudinal direction Y. One or more elastic members 28 are fixed to the inner sheet 241 or the outer sheet 242 by hot melt adhesive or the like.

[0071] As shown in Figure 6, in the fixed region FA, the leak-proof gather 25 (inner sheet 241) is fixed to the surface sheet 21 with hot melt adhesive or the like. The outer gather 27 is also fixed to the leak-proof gather 25 with hot melt adhesive or the like. That is, as shown in Figure 6, with the outer gather 27 folded outwards, the portion of the outer sheet 242 that constitutes the leak-proof gather 25 and the portion that constitutes the outer gather 27 are joined together with hot melt adhesive or the like in the regions facing each other. As a result, the pair of fixed regions FA facing each other in the longitudinal direction Y function as fixed ends for expanding and contracting the leak-proof gather 25 in the longitudinal direction Y, and also function as fixed ends for expanding and contracting the outer gather 27 in the longitudinal direction Y.

[0072] As shown in Figure 3, in the absorbent article 1, when the leak-proof gather 25 is folded inward in the width direction X, at least on the center line CL2, the edge 31c of the absorbent core 31 in the width direction X is located outside the top 25b of the leak-proof gather 25 in the width direction X. That is, the absorbent core 31 is formed in a wide shape (for example, without a typical constricted shape, or if there is a constricted part, the width of the constricted part is larger than the typical size) that has the above positional relationship with respect to the leak-proof gather 25. This enhances the effect of the absorbent core 31 in preventing lateral leakage of excrement.

[0073] (Effects of absorbent materials) According to absorbent article 1, the following two components work synergistically to provide an excellent urine leakage suppression effect. Firstly, the absorbent core 31 has a wide shape that extends outward in the width direction X from the top 25b of the leak-proof gather 25 at the central position of the absorbent body 23 in the longitudinal direction Y (on the center line CL2), thus securing a large absorption area and having high absorption capacity. Secondly, the leak-proof gather 25 has a liquid-impermeable film member 243 over a wide range of its rising height. That is, the dimensional relationship "L≧H / 2" described above holds true (see Figure 5). This film member 243 effectively functions as a leak-proof wall that delays the leakage of urine from the components of the leak-proof gather 25 (i.e., the side sheet 24) when the leak-proof gather 25 blocks urine that cannot be instantly absorbed by the absorbent core 31. This ensures sufficient time for urine absorption in the absorbent core 31. In other words, while the film member 243 delays the seepage of urine, the wide absorbent core 31 can effectively absorb the urine that has been blocked by its high absorbency. As a result, even in cases of large amounts of urination, the occurrence of urine leakage can be effectively suppressed.

[0074] More preferably, the film member 243 may be provided so as to extend at least 70% or more of the height H from the upright support point 25a to the top 25b, along the center line CL2. That is, the leak-proof gather 25 may be provided so as to satisfy the dimensional relationship "L≧H×0.7". In this case, the function of the film member 243 as a leak-proof wall can be made more effective.

[0075] As shown in Figure 5, the leak-proof gather 25 includes a sheet member (in this embodiment, an inner sheet 241 and an outer sheet 242) that overlaps with the film member 243 and constitutes the top portion 25b, and an elastic member 26 (in this embodiment, a first elastic member 26a and a second elastic member 26b) fixed to the sheet member so as to be expandable and contractible in the longitudinal direction Y. Furthermore, the end portion 243a of the film member 243 on the top portion 25b side is located closer to the upright support point 25a than the position where the elastic member 26 is provided. That is, the portion of the film member 243 included in the leak-proof gather 25 (the portion from the upright support point 25a to the top portion 25b) is provided so as not to overlap with the elastic member 26. In this embodiment, the end portion 243a of the film member 243 is located slightly closer to the upright support point 25a than the position where the first elastic member 26a is provided so as not to overlap with the first elastic member 26a. If the film member 243 and the elastic member 26 overlap, the film member 243 may expand and contract together with the elastic member 26 in that area, resulting in the film member 243 becoming cohesive and creating a stiffer (rougher) area compared to other parts. This may impair the wearer's comfort. In contrast, by using a configuration that prevents the film member 243 from reaching the position where the elastic member 26 is provided, as described above, the occurrence of the above-mentioned problem can be prevented.

[0076] At least the portion of the leak-proof gather 25 from the upright pivot point 25a to the top 25b where the film member 243 exists includes the film member 243 and two or more sheet members (in this embodiment, an inner sheet 241 and an outer sheet 242). With the above configuration, the function of the leak-proof wall can be effectively enhanced by constructing the portion of the leak-proof gather 25 that includes the film member 243 (i.e., the portion that mainly functions as a leak-proof wall) with three or more layers. In this embodiment, the portion of the leak-proof gather 25 that includes the film member 243 is constructed of three layers of sheets, but in order to further improve the function of the leak-proof wall, this portion may be constructed of four or more layers of sheets (i.e., a configuration that includes three or more layers of sheets in addition to the film member 243).

[0077] The absorbent article 1 includes two or more sheet members that constitute the leak-proof gather 25 together with the film member 243: an inner sheet 241 made of nonwoven fabric that faces one surface of the film member 243, and an outer sheet 242 made of nonwoven fabric that faces the other surface of the film member 243. With this configuration, the film member 243 included in the leak-proof gather 25 is prevented from being exposed to the outside, and the part that touches the wearer's skin is made of nonwoven fabric (inner sheet 241 and outer sheet 242), thereby improving the wearer's comfort (feel of the leak-proof gather 25 against the skin).

[0078] The absorbent article 1 further comprises an outer gather 27 formed by at least a portion of the two or more sheet members described above. As described above, in this embodiment, the outer gather 27 is composed of an inner sheet 241 and an outer sheet 242. The outer gather 27 is composed of a portion that is folded outward at the top 25b of the leak-proof gather 25 and extends further, and has an elastic member 28 that expands and contracts in the longitudinal direction Y. With the above configuration, the outer gather 27 can cover the outside of the leak-proof gather 25. More specifically, when worn, the wearer's thigh, which is passed through the leg opening H2, comes into contact with the outer gather 27, pressing the outer gather 27 against the outer surface of the leak-proof gather 25. As a result, the outer gather 27 fits the wearer's thigh and overlaps with the leak-proof gather 25, acting as a backup to block urine that has passed through the leak-proof gather 25. This two-tiered configuration of the leak-proof gather 25 and the outer gather 27 makes it possible to more effectively suppress urine leakage even if urine seeps outside the leak-proof gather 25.

[0079] For example, the basis weight of film material 243 is 18 g / m². 2 The following applies. According to the above configuration, the basis weight is 18 g / m². 2 By keeping the following limits in place to ensure the flexibility of the film member 243, a comfortable fit can be provided to the wearer. More specifically, from the viewpoint of enhancing the function as a leak-proof barrier as described above, it is preferable to make the basis weight of the film member 243 as large as possible. However, from the viewpoint of balancing leak suppression and comfortable wear, it is preferable to set the upper limit of the basis weight of the film member 243 as described above.

[0080] The film member 243 may be configured to have relatively low breathability. For example, the moisture permeability of the film member 243 may be 5 g / m². 2 ·day or more 500g / m 2·It may be set to below ·day. The water vapor permeability of the film member 243 can be measured by the water vapor permeability test method (cup method) of moisture-proof packaging materials defined in "JIS Z 0208: 1976". According to the above configuration, not only can urine leakage in the leak-proof gather 25 (the part where the film member 243 is provided) be prevented, but moisture can also be prevented from escaping to the outside. Thereby, it is possible to suppress the outer surface of the absorbent article 1 from getting wet due to the moisture discharged to the outside of the leak-proof gather 25.

[0081] Alternatively, the film member 243 may be configured to have a relatively high air permeability. For example, the water vapor permeability of the film member 243 is greater than 500 g / m 2 ·day and less than or equal to 7000 g / m 2 ·day. According to the above configuration, while suppressing urine leakage in the leak-proof gather 25 (the part where the film member 243 is provided), it is possible to reduce stuffiness by making it easier for moisture such as sweat to escape to the outside. Thereby, a comfortable wearing feeling can be provided to the wearer.

[0082] At least the portion of the film member 243 that extends from the standing fulcrum 25a toward the top 25b (that is, the portion that constitutes the leak-proof gather 25) may be colored in a color other than white. For example, the above portion (or the whole including the above portion) of the film member 243 may be colored blue. According to the above configuration, the visibility of the film member 243 included in the leak-proof gather 25 can be enhanced. Thereby, when the user exchanges the absorbent article 1 or the like, the colored portion of the film member 243 can be visually recognized, so that a sense of security regarding the leak-proof function can be given to the user.

[0083] As shown in Figure 3, the absorber 23 has a colored region A1 that is colored in a color other than white, overlapping with at least a portion of the absorbent core 31, including its edge 31c, in the thickness direction Z. Here, if the distance between the tops 25b of each of the pair of leak-proof gathers 25 in an extended state, where each of the pair of leak-proof gathers 25 is spread outward in the width direction X along the width direction X, then the sum of the lengths of the film member 243 and the colored region A1 in the width direction X is d in the region along the width direction X that passes through the central position of the absorber 23 in the longitudinal direction Y. SUM This may be set to 1 / 3 or more of the first distance d1. That is, "d SUM The film member 243 and the colored length (width) of the colored region A1 may be set such that "≥d1 / 3" is satisfied.

[0084] The first distance d1 described above is expressed by the sum of the heights H of the two leakproof gathers 25 and the width of the absorbent 23 (in this embodiment, "2w1 + w2") as shown in equation (1) below. SUM This is expressed as the sum of the lengths in the width direction X of the two film members 243 (the parts that make up the leak-proof gather 25) (2L) and the sum of the widths of the two colored regions A1 (2w1), as shown in equation (2) below. d1 = 2H + 2w1 + w2 …(1) d SUM = 2L + 2w1 …(2)

[0085] According to the above configuration, when the inside of the absorbent article 1 is viewed from the front of the area where the absorbent core 31 is located, a wide area of ​​the absorbent core 31 and leak-proof gather 25 related to leak prevention is highlighted by coloring, thereby providing the user with a sense of visual reassurance. In other words, the user can be effectively given the impression that the leak suppression and absorption functions are being performed over a sufficiently wide area that is colored.

[0086] To enhance the above visual effect, it is preferable to give the impression that the colored area A1 and the colored portion of the film member 243 are continuously connected. That is, by making the user perceive the leak-proof gather 25, which functions as a leak-proof wall, and the portion of the absorbent core 31 (including the edge 31c) positioned close to the leak-proof gather 25 as a single unit, it is possible to increase the user's sense of security regarding the area (i.e., the colored area) that is configured to block and absorb urine. To this end, in this embodiment, the absorbent core 31 extends to the end of the absorbent body 23 in the width direction X, at least along the center line CL2, and the colored area A1 is provided in the portion including that end. In addition, the leak-proof gather 25 has an upright support point 25a along the end of the absorbent body 23 in the width direction X. This gives the user the impression that the colored area A1 and the film member 243 (colored portion) are continuously connected.

[0087] As described above, the absorber 23 has a colored region A1 in the thickness direction Z that overlaps with at least a portion of the absorbent core 31, including its edge 31c, and is colored in a color other than white (for example, blue). In this case, the L value in the Lab color system of the colored region A1 may be smaller than the L value in the Lab color system of the colored portion of the film member 243. In other words, the colored portion overlapping with the absorbent core 31 (colored region A1) may be a darker color than the colored portion of the leak-proof gather 25 (film member 243). The L values ​​of the colored region A1 and the colored portion of the leak-proof gather 25 can be measured using a colorimeter (for example, a Konica Minolta CR-400). According to the above configuration, the absorbent core 31, which has an absorption function, is made conspicuous with a dark color, while the leak-proof gather 25 (film member 243), which has a similar function (leak-proof function), is made conspicuous with a lighter color than the absorbent core 31. This allows the components related to leak prevention to be conspicuous in an appropriate balance, and provides the user with an appropriate sense of visual reassurance. In order to make the relative intensity between regions clearer, the difference between the L value of the colored region A1 and the L value of the colored portion of the film member 243 is preferably 5 or more, and more preferably 10 or more. In addition, in order to make it easier to compare the intensity between regions, the colored region A1 and the colored portion of the film member 243 may be the same color (in this embodiment, for example, a blue color).

[0088] [Differentiation] Although embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments described above. The materials and shapes of each component are not limited to those described above, and various materials and shapes can be used. In addition, some components of the absorbent article 1 described above may be modified or omitted.

[0089] In the above embodiment, the film member 243 was provided from the non-skin side Z2 of the absorbent body 23, wrapping around to the skin side Z1. However, the film member 243 only needs to be provided in the portion beyond the upright pivot point 25a of the leak-proof gather 25 (the portion toward the top 25b). However, as in this embodiment, by forming the film member 243 so that it wraps around the side of the absorbent body 23 from the upright pivot point 25a of the leak-proof gather 25 and covers the non-skin side Z2 of the absorbent body 23, it is possible to suppress not only the lateral leakage from the skin side Z1 of the absorbent body 23 as described above, but also leakage from the sides and non-skin side Z2 of the absorbent body 23.

[0090] Furthermore, although the film member 243 was provided together with the inner sheet 241 and the outer sheet 242 over the entire area of ​​the interior body 20 in the longitudinal direction Y, the film member 243 may be provided only in a portion of the area in the longitudinal direction Y, including the center line CL2. For example, the film member 243 may be provided in an area having a length of at least 1 / 3 of the total length of the interior body 20 in the longitudinal direction Y, centered on the center line CL2.

[0091] In the above embodiment, the film member 243 was sandwiched between two nonwoven fabric sheets (inner sheet 241 and outer sheet 242), but one surface of the film member 243 may be exposed to the outside. For example, the film member 243 may be positioned inside the inner sheet 241. In this case, the film member 243 will be exposed as part of the inner surface of the leak-proof gather 25. Alternatively, the film member 243 may be positioned outside the outer sheet 242. In this case, the film member 243 will be exposed as part of the outer surface of the leak-proof gather 25. As yet another example, the inner sheet 241 or the outer sheet 242 of the side sheet 24 may be omitted. Even in such a case, the portion of the nonwoven fabric sheet (inner sheet 241 or outer sheet 242) provided together with the film member 243 that extends beyond the end 243a can be folded back to form the portion of the leak-proof gather 25 beyond the end 243a and the outer gather 27.

[0092] Figure 7 shows an interior body 20A including the first modified example of the leak-proof gather (leak-proof gather 25A) (a schematic diagram showing the structure of the cross-section corresponding to the cross-section along the VV line in Figure 3). Interior body 20A differs from interior body 20 in that it has a leak-proof gather 25A instead of a leak-proof gather 25. Leak-proof gather 25A differs from leak-proof gather 25 in that it does not have an outer gather 27 extending beyond it. Thus, the outer gather 27 may be omitted. Even in this case, the film member 243 included in the leak-proof gather 25A provides the same effect as the absorbent article 1 described above (the effect of not requiring the outer gather 27).

[0093] Figure 8 shows the interior body 20B including a second modified example of the leak-proof gather (leak-proof gather 25B) (a schematic diagram showing the structure of the cross-section corresponding to the cross-section along line VV in Figure 3). The interior body 20B differs from the interior body 20 in that it has a leak-proof gather 25B instead of a leak-proof gather 25. The leak-proof gather 25B differs from the leak-proof gather 25 in that it does not have an outer gather 27 extending beyond it, and the film member 243 extends to the top 25b, and an elastic member 26 is provided between the film member 243 and one of the sheet members (outer sheet 242 in this example). That is, in this example, the film member 243 extends from the upright support point 25a to the top 25b, at least on the center line CL2. With the above configuration, by extending the film member 243 to the top 25b of the leak-proof gather 25B, the function of the film member 243 as a leak-proof wall can be maximized.

[0094] In the above embodiment, the pair of colored regions A1 were realized by arranging colored tissue 33 as a separate component from the absorbent core 31 and the white tissue 32. However, the colored regions A1 may also be formed by printing (for example, color printing on a part of the white tissue 32). When the colored regions A1 are formed by printing, the components (colored tissue 33) used to form the colored regions A1 can be reduced.

[0095] In the above embodiment, the film member 243 was provided as a separate component from the back sheet 22 (film), but the film member 243 may be formed integrally with the back sheet 22. That is, the film member 243 may be composed of a portion extending further from the end of the back sheet 22 in the width direction X. In this case, the colored portion may be provided by color printing the portion of the integrally formed film member (back sheet 22 + film member 243) that corresponds to the film member 243.

[0096] Furthermore, in the above embodiment, the absorbent article 1 was a pant-type diaper, but the absorbent article 1 may also be a tape-type diaper. Also, the absorbent article 1 may be an absorbent pad having the same or similar configuration as the inner body 20 of the above embodiment, but without the configuration corresponding to the outer body 10 of the above embodiment. When the absorbent article 1 is configured as a tape-type diaper or an absorbent pad, the "unfolded state" of the absorbent article 1 described in the above embodiment is defined as the state in which the absorbent article 1 is stretched to a state in which no wrinkles are formed. [Explanation of Symbols]

[0097] 1...Absorbent article, 1a...Ventral region, 1b...Dorsal region, 1c...Crotch region, 21...Front sheet, 22...Back sheet, 23...Absorbent material, 25, 25A, 25B...Leak-proof gathers, 25a...Support point, 25b...Top, 26...Elastic member, 27...Outer gathers, 28...Elastic member, 31...Absorbent core, 31c...Edge, 241...Inner sheet (first nonwoven sheet), 242...Outer sheet (second nonwoven sheet), 243...Film member, 243a...End, A1...Colored region, X...Width direction, Y...Longest direction, Z...Thickness direction, Z1...Skin side, Z2...Non-skin side.

Claims

1. An absorbent article having a ventral region located on the wearer's ventral side when worn, a dorsal region located on the wearer's dorsal side when worn, and a crotch region positioned between the ventral region and the dorsal region in the longitudinal direction, A liquid-permeable surface sheet located on the skin side of the wearer in the aforementioned wearing state, In the aforementioned wearing state, a liquid-impermeable back sheet is located on the side of the wearer that is not directly against their skin, An absorbent body comprising an absorbent core disposed between the surface sheet and the back sheet, which absorbs the wearer's excrement, The device comprises a pair of leak-proof gathers provided on both sides of the absorbent in the width direction perpendicular to the longitudinal direction, the ends of which are fixed in the longitudinal direction and the portion between the ends of which is configured to be able to stand upright by contracting in the longitudinal direction, With the leak-proof gather folded inward in the width direction, at the central position of the absorbent body in the longitudinal direction, the edge of the absorbent core in the width direction is located outside in the width direction, beyond the top of the leak-proof gather. The leak-proof gather includes a liquid-impermeable film member having at least a portion extending from the upright pivot point of the leak-proof gather toward the top of the leak-proof gather, The film member extends at least 50% or more of the height from the upright support point to the top of the absorber, at least at the central position of the absorber in the longitudinal direction. At least the portion of the film member extending from the upright support point toward the top is colored with a color other than white. The absorbent material has a colored region that is colored in a color other than white, overlapping with at least a portion of the absorbent core, including the edge, in the thickness direction perpendicular to the longitudinal and width directions, When the distance between the tops of each of the pair of leak-proof gathers in an extended state, where each of the pair of leak-proof gathers is spread outward in the width direction along the width direction, is defined as the first distance, the sum of the lengths of the film member and the colored region in the width direction is at least 1 / 3 of the first distance in a region along the width direction that passes through the central position of the absorbent in the longitudinal direction. The top of the leak-proof gather is, if the leak-proof gather has a portion that is folded back outward at the tip side, the base of the folded portion, and if the leak-proof gather does not have a folded portion, the position furthest from the upright pivot point of the leak-proof gather, in an absorbent article.

2. The absorbent article according to claim 1, wherein the film member extends at least 70% or more of the height from the upright pivot point to the top of the absorbent at the central position of the absorbent in the longitudinal direction.

3. The absorbent article according to claim 1, wherein the film member extends from the upright pivot point to the top of the absorbent at least at the central position of the absorbent in the longitudinal direction.

4. The leak-proof gather comprises a sheet member that overlaps with the film member and forms the top portion, and an elastic member fixed to the sheet member so as to be expandable and contractible in the longitudinal direction. The absorbent article according to claim 1, wherein the top end of the film member is located on the upright support side of the position where the elastic member is provided.

5. The absorbent article according to claim 1, wherein the portion of the leak-proof gather in the range from the upright pivot point to the top portion in which the film member exists includes the film member and two or more sheet members.

6. The absorbent article according to claim 5, wherein the two or more sheet members include a first nonwoven fabric sheet facing one surface of the film member and a second nonwoven fabric sheet facing the other surface of the film member.

7. The outer gathers are further formed by at least a portion of the two or more sheet members, The absorbent article according to claim 5, wherein the outer gather is composed of a portion that is folded outward at the top of the leak-proof gather and extends further, and has an elastic member that expands and contracts in the longitudinal direction.

8. The basis weight of the aforementioned film material is 18 g / m². ２ The absorbent article according to claim 1, which is as follows:

9. The moisture permeability of the aforementioned film member is 5 g / m². ２ ・Over 500g / m ２ - The absorbent article according to claim 1, wherein the number of days is less than or equal to 1 day.

10. The moisture permeability of the aforementioned film member is 500 g / m². ２ - Larger than the day, at 7000g / m ２ - The absorbent article according to claim 1, wherein the number of days is less than or equal to 1 day.

11. The absorbent article according to any one of claims 1 to 10, wherein the L value in the Lab color system of the colored region is smaller than the L value in the Lab color system of the colored portion of the film member.

12. The film member includes a first portion located on the non-skin side of the back sheet, and a second portion that wraps around the side of the absorbent and connects the first portion with a portion that extends from the upright pivot point toward the top. The absorbent article according to any one of claims 1 to 10, wherein the first and second portions of the film member are also colored with a color other than white.

13. In the width direction, the absorbent core extends to the end of the absorbent body in the width direction, The absorbent article according to any one of claims 1 to 10, wherein the upright pivot point of the leak-proof gather is along the end of the absorbent in the width direction.

Images