Absorbent article

Abstract

An absorbent article (1) has an absorbent core (11) having liquid absorbency and a pair of waist portions (20) provided at positions closer to a non-skin side than the absorbent core (11), wherein a colored portion (S) having a color is provided, at least one of the waist portions (40a) among the waist portions (20) has a hydrophobic portion (41) having hydrophobicity and a hydrophilic portion (42) having hydrophilicity, the hydrophilic portion (42) is at least a portion of a surface of the one waist portion (40a) closest to the non-skin side, the hydrophobic portion (41) overlaps at least a portion of the hydrophilic portion (42) when viewed from the non-skin side, and the hydrophilic portion (42) overlaps at least a portion of the colored portion (S).

Description

Technical Field

[0001] This invention relates to absorbent articles. Background Technology

[0002] In the past, in absorbent articles such as disposable underwear diapers, techniques have been known to improve absorbency by using hydrophilic sheets in the sheet components constituting the absorbent article. For example, Patent Document 1 discloses a disposable diaper having waist flaps with hydrophobic skin-side flaps on the side facing the wearer's skin and hydrophilic non-skin-side flaps on the non-skin-facing side of the skin-side flaps. Such a disposable diaper can easily absorb moisture such as sweat from the wearer's skin when worn.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-113188 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, even if the non-skin side panels absorb sweat and other moisture, it is difficult for the wearer or the person helping to put on the disposable diaper to visually identify the absorption of sweat. Furthermore, the hydrophobic outer layer on the non-skin side panels can easily cause moisture absorbed from the wearer's skin to remain on the non-skin side panels, sometimes leading to skin rashes or discomfort due to the moisture-containing waistband panels.

[0008] The present invention was made in view of the aforementioned problems, and its object is to provide an absorbent article that can improve the sweat absorption and moisture evaporation of the waist area, and easily give the wearer the impression that it is an absorbent article with sweat absorption and evaporation functions.

[0009] Solution for solving the problem

[0010] The main invention for achieving the above objective is an absorbent article having: a liquid-absorbing core; and a pair of waist portions disposed at a position closer to the non-skin side than the absorbent core. The absorbent article is characterized by having a colored portion, and at least one of the waist portions having a hydrophobic portion and a hydrophilic portion. The hydrophilic portion is at least a portion of the non-skin side of the waist portion, and when viewed from the non-skin side, at least a portion of the hydrophobic portion overlaps with at least a portion of the hydrophilic portion, and at least a portion of the hydrophilic portion overlaps with at least a portion of the colored portion.

[0011] Other features of the invention will become apparent from the description and accompanying drawings.

[0012] The effects of the invention

[0013] According to the present invention, by providing a colored portion in the area overlapping with the hydrophilic portion, the wearer's sweat can be transferred from the hydrophobic portion in the waistband to the hydrophilic portion, and the water can be evaporated through the hydrophilic portion. Since the color change caused by water absorption is more pronounced in the colored portion compared to the white component, the wearer and the person helping to put on the absorbent item can easily recognize it by the color concentration change of the colored portion, so that the wearer and others can recognize that it is an absorbent item with sweat absorption and evaporation functions. Attached Figure Description

[0014] Figure 1 This is a rough 3D diagram of Diaper 1.

[0015] Figure 2 This is a top view of diaper 1 in its unfolded and extended state.

[0016] Figure 3 yes Figure 2 A rough cross-sectional view at line A-A.

[0017] Figure 4 The diaper 1 is folded in half at the center position CL. Figure 2 A rough cross-sectional view of the portion corresponding to line A-A.

[0018] Figure 5A This is a top view of the absorbent body 10. Figure 5B This is a schematic cross-sectional view of the absorbent body 10.

[0019] Figure 6A This is an explanatory diagram showing the components of diaper 1 disassembled in the thickness direction. Figure 6B It is Figure 6A An explanatory diagram showing the overlapping state of the constituent components of diaper 1 in the thickness direction.

[0020] Figures 7A to 7C This diagram illustrates the basic principle of moisture absorption and evaporation in the back waistband 40a of diaper 1.

[0021] Figure 8A This is a diagram illustrating the color change of the water absorption area WW in the white part W. Figure 8B This is a diagram illustrating the color change of the water absorption region SW in the colored part S.

[0022] Figure 9 This is an enlarged sectional view of a portion of the rear waist section 40a.

[0023] Figure 10 This is a diagram illustrating other implementation methods. Detailed Implementation

[0024] Based on the description in this specification and the accompanying drawings, at least the following matters become clear.

[0025] An absorbent article comprising: a liquid-absorbing core; and a pair of waist portions disposed at a position closer to the skin than the absorbent core, characterized in that the absorbent article has a colored portion, and at least one of the waist portions has a hydrophobic portion and a hydrophilic portion, the hydrophilic portion being at least a portion of the side of the waist portion closest to the skin, wherein when viewed from the non-skin side, at least a portion of the hydrophobic portion overlaps with at least a portion of the hydrophilic portion, and at least a portion of the hydrophilic portion overlaps with at least a portion of the colored portion.

[0026] Based on this type of absorbent material, by providing a colored portion in the area overlapping with the hydrophilic portion, the wearer's sweat can be transferred from the hydrophobic portion in the waist area to the hydrophilic portion, and the moisture can be evaporated through the hydrophilic portion. Since the color change caused by moisture absorption is more pronounced in the colored portion compared to a white component, it is easier for the wearer and those assisting in putting on the absorbent material to perceive the color intensity changes in the colored portion, leading the wearer to recognize the part that absorbs sweat and evaporates moisture, thus easily creating the impression that this is an absorbent material with sweat-absorbing and evaporation functions. Furthermore, when the hydrophilic portion is made of hydrophilic nonwoven fabric, the moisture from the wearer's sweat easily diffuses in the planar direction of the hydrophilic nonwoven fabric, thus the area of ​​color intensity change determined by moisture becomes larger, making it easier for the wearer to perceive the color intensity changes in the colored portion.

[0027] In this absorbent article, it is preferable that the absorbent article has intersecting vertical and horizontal directions, and in one of the waist portions, the colored portion is located at an upper position than the absorbent core.

[0028] Based on such absorbent materials, the wearer can easily recognize that the sweat is being absorbed from a position above the absorbent core.

[0029] In this absorbent article, it is preferable that a leak-proof sheet is provided at a position closer to the non-skin side than the absorbent core, and that the colored portion is provided at an upper position than the leak-proof sheet in one of the waistband portions.

[0030] Based on such absorbent materials, the wearer can easily recognize that the sweat is being absorbed on a side higher than the liquid-impermeable leak-proof sheet.

[0031] In this absorbent article, it is preferable that the absorbent article has intersecting vertical and horizontal directions, and the upper end of the colored portion is located at a position lower than the upper end of the waist portion.

[0032] Such absorbent materials can easily give the wearer the impression that the upper part of the waist area does not absorb sweat, making it easy for the wearer to touch or grab the upper part of the waist area.

[0033] In this absorbent article, it is preferable that the hydrophobic portion and the hydrophilic portion each have fibers, and the fiber density of the hydrophobic portion is lower than the fiber density of the hydrophilic portion.

[0034] Such absorbent materials facilitate the transfer of moisture from the hydrophobic portion to the hydrophilic portion, making it easier for the wearer to perceive changes in the color concentration of the colored portion.

[0035] In this absorbent article, it is preferable that the colored portion has fibers and that the colored portion has a compression portion that is compressed in the thickness direction of the waist portion.

[0036] Based on such absorbent materials, the high fiber density of the compressed part easily absorbs moisture, thus making the color of the colored part more intense and allowing the wearer to easily recognize the sweat-wicking function.

[0037] In this absorbent article, it is preferable that, in the compression section, the colored portion and the adjacent member in the thickness direction are compressed in the thickness direction.

[0038] Based on such absorbent materials, it is easy to make the color of the colored part change more intensely, and it is easy to promote the transfer of moisture between the colored part and the adjacent components.

[0039] In this absorbent article, preferably, when the waist portion contains moisture, the color of the colored portion is visually perceived to be more intense than before the moisture was contained, and the area of ​​the intense color visually perceived has: a first colored portion with a visually perceived concentration of a predetermined color; and a second colored portion with a visually perceived lighter color than the first colored portion.

[0040] Based on such an absorbent material, the wearer can easily perceive the change in color concentration in the colored part by considering the difference in color concentration between the first and second colored parts.

[0041] In this absorbent article, preferably, the hydrophobic portion is a hydrophobic portion on one side, the hydrophilic portion is a hydrophilic portion on one side, the colored portion is a colored portion on one side, and the other waist portion has a hydrophobic portion on one side and a hydrophilic portion on the other side. The hydrophilic portion on the other side is at least a portion of the side of the other waist portion closest to the non-skin side. The other waist portion has a colored portion on the other side. When viewed from the non-skin side of the other waist portion, at least a portion of the hydrophobic portion on the other side overlaps with at least a portion of the hydrophilic portion on the other side, and at least a portion of the hydrophilic portion on the other side overlaps with at least a portion of the colored portion on the other side.

[0042] Based on such absorbent materials, not only on one side of the waist, but also on the other side, the wearer can recognize the part that can absorb sweat and evaporate moisture by the change in the color concentration of the colored part on the other side, thus easily giving the impression that the other side of the waist has the function of absorbing sweat and evaporating moisture.

[0043] In this absorbent article, it is preferable that the absorbent article has intersecting vertical and horizontal directions, and the upper ends of the colored portion on one side and the upper ends of the colored portion on the other side are located at different positions.

[0044] Based on such absorbent materials, colored portions are provided on one side and the other side of the waist at suitable locations for sweat absorption within the wearer's body, respectively. This allows the wearer to easily perceive the changes in color concentration between the colored portions on one side and the other side due to sweat absorption.

[0045] In this absorbent article, preferably, the absorbent article has intersecting vertical and horizontal directions, and at one end and the other end in the horizontal direction, there is a one-sided joint portion and a other-sided joint portion that joins the one-sided waist portion to the other side, respectively. On one side in the horizontal direction, the side end of the colored portion is located outside the side joint portion.

[0046] Based on such absorbent materials, the joint where one waist area and the other waist area meet is a part that is unlikely to change color due to sweat absorption. Therefore, by comparing the color of the colored part located on the outer side of the joint and the color of the colored part located on the inner side of the joint, the wearer can easily recognize the difference in color concentration of the colored part caused by sweat absorption.

[0047] In this absorbent article, it is preferable that the colored portion is located on the skin side closer to the hydrophilic portion than the hydrophilic portion.

[0048] Based on such absorbent materials, if the waist area absorbs sweat, in addition to the color change of the colored part due to sweat, it is also easy to shorten the distance between the component located on the side closer to the skin than the colored part and the colored part. Therefore, the wearer can easily perceive the change in the color intensity of the colored part.

[0049] In this absorbent article, it is preferable that the brightness of the colored portion is lower than the brightness of the hydrophilic portion.

[0050] Because of the fact that the colored part of such an absorbent material is easily visible through the hydrophilic part, the wearer can easily perceive the changes in the color intensity of the colored part.

[0051] In this absorbent article, preferably, the absorbent article has intersecting vertical and horizontal directions, the absorbent core is provided in the absorbent body, the colored portion is a sheet member provided in a position closer to the skin than the hydrophobic portion, and when viewed from the non-skin side, the colored portion has a portion that overlaps with the absorbent body.

[0052] According to such absorbent materials, the absorbent body is thicker than other parts. The absorbent body is the part where the wearer is prone to sweating when wearing it. Therefore, the part that overlaps with the absorbent body overlaps with the colored part, making it easier for the wearer to perceive the change in color concentration of the colored part caused by sweat absorption.

[0053] In this absorbent article, preferably, the absorbent article has intersecting vertical and horizontal directions, the absorbent core is provided in the absorbent body, the colored part is a sheet member provided in a position closer to the skin than the hydrophobic part, and the lower end of the colored part has a non-joining part that does not join with the member adjacent to the colored part in the thickness direction of the waist portion.

[0054] According to such absorbent materials, when the colored part comes into contact with sweat during wear, the distance between the non-contact part at the lower end of the colored part and the wearer's skin is easily reduced. As a result, the color concentration of the colored part is easily changed, making the wearer realize that it is a part that can absorb sweat and evaporate moisture. This easily gives the impression that the absorbent material has the functions of absorbing sweat and evaporating moisture.

[0055] ===This implementation method===

[0056] As an example of the absorbent article involved in this invention, a disposable diaper 1 (hereinafter also referred to as "diaper 1") in the form of underwear is described. However, the absorbent articles involved in this invention also include disposable diapers in the form of belts, sanitary napkins in the form of shorts, or other absorbent articles. In addition, the wearer of the absorbent article can also be an infant, an adult, or an animal.

[0057] <Composition of Diaper 1>

[0058] Figure 1 This is a simplified 3D diagram of Diaper 1. Diaper 1 is... Figure 1 In the shown underwear configuration, there are intersecting vertical, horizontal, and front-back directions, and a waist opening (BH) and a pair of leg openings (LH, LH). The upper side of the vertical direction corresponds to the waist opening (BH), and the lower side corresponds to the crotch area. Additionally, the front side of the front-back direction corresponds to the wearer's abdomen, and the back side corresponds to the wearer's back.

[0059] Figure 2 This is a top view of diaper 1 in its unfolded and extended state. Figure 3 yes Figure 2 A schematic cross-sectional view along line A-A. Furthermore, the "unfolded state" of diaper 1 refers to the state in which the joints (lateral joints 1e) of the sides of the front strap member 30 and the rear strap member 40 are separated, and the diaper 1 is unfolded into a flat shape. The "stretched state" of diaper 1 refers to the state in which the diaper 1 as a whole (the entire product) is stretched without wrinkles; specifically, it refers to the state in which the dimensions of each component constituting diaper 1 (e.g., the absorbent body 10, strap members 30, 40, etc., described later) are the same as or close to the dimensions of that individual component.

[0060] In addition, Figure 2 In its unfolded state, diaper 1 has intersecting longitudinal and transverse directions. Figure 2 The C-C line in the diagram is the center line in the horizontal direction. The vertical direction is along... Figure 1 The vertical direction is equivalent to the length direction of the absorbent body 10. The horizontal direction is along... Figure 1 The left and right directions within. Additionally, such as... Figure 3 As shown, the direction in which the material layers constituting diaper 1 are laid is defined as the thickness direction. The side in the thickness direction that comes into contact with the wearer's skin is defined as the skin side, and the opposite side is defined as the non-skin side.

[0061] The diaper 1 has an absorbent body 10 and strap members 30 and 40 disposed on the non-skin side of the absorbent body 10. The strap members 30 and 40 have a front strap member 30 corresponding to the front piece of the diaper 1 and a rear strap member 40 corresponding to the back piece of the diaper 1. That is, the diaper 1 is a so-called three-piece panty-type diaper, having: an absorbent body 10 that fits against the crotch of the wearer and absorbs urine and other excrement; a front strap member 30 having a front waistband portion 30a that covers the wearer's abdomen; and a rear strap member 40 having a rear waistband portion 40a that covers the wearer's back. In addition, as a panty-type diaper, it is not limited to a three-piece type, and can also be a two-piece panty-type diaper in which the front strap member 30 and the rear strap member 40 are integrated.

[0062] exist Figure 2 In its unfolded state, with the front belt member 30 and the rear belt member 40 arranged parallel to each other in a longitudinally spaced manner, an absorbent body 10 is erected between them, and the ends 10ea and 10eb of the absorbent body 10 in the longitudinal direction are respectively joined and fixed to the skin side of the nearest belt member 30 and 40. Its appearance shape is roughly H-shaped when viewed from above.

[0063] from Figure 2 Starting from the state shown, the vertical center position CL is taken as the fold position (fold line), as follows: Figure 4 As shown, the absorbent body 10 is folded in half with the front side strap member 30 (front waist portion 30a) and the rear side strap member 40 (rear waist portion 40a) facing each other. Figure 4 The diaper 1 is folded in half at the center position CL. Figure 2 A rough cross-sectional view of a portion corresponding to line A-A. Figure 4 For convenience, the adhesive used to join the components is omitted. In this folded state, the front waist section 30a and the rear waist section 40a, facing each other, have their side portions 30sw and 40sw joined and connected in the left-right direction to form a pair of side joints 1e, 1e. The side joints 1e are formed by known joining methods such as melting or bonding. The front belt member 30 and the rear belt member 40 are formed into a ring shape by the pair of side joints 1e, 1e, becoming... Figure 1 The diaper 1 is shown in an underwear-like configuration, with a waist opening BH and a pair of leg openings LH, LH. The portion of the diaper 1 above the upper end of the leg openings LH is also referred to as the waist portion 20 (front waist portion 30a, back waist portion 40a), and the portion below the upper end of the leg openings LH is also referred to as the crotch portion 50. Furthermore, in this underwear-like disposable diaper, the area that overlaps with the pair of side joints 1e in the vertical direction is referred to as the waist portion 20.

[0064] At a position lower in the vertical direction than the side joint 1e (including the lower end of the side joint 1e), the leg opening LH of the diaper 1 is formed by the waistband 20 and a part of the absorbent body 10. Specifically, the area surrounded by the lower edge of the front strap member 30, the lower edge of the rear strap member 40, and the left and right side edges of the absorbent body 10 is the leg opening LH.

[0065] (Absorbent Subject 10)

[0066] Figure 5A This is a top view of the absorbent body 10. Figure 5BThis is a schematic cross-sectional view of the absorbent body 10. The absorbent body 10 is composed of white components, including: an absorbent core 11 for absorbing excrement; a top sheet 12 disposed on the skin side in the thickness direction relative to the absorbent core 11; and a bottom sheet 13 disposed on the non-skin side relative to the absorbent core 11. However, the absorbent body 10 may also have other sheet components. For example, a sub-sheet (not shown) may be provided between the top sheet 12 and the absorbent core 11 in the thickness direction.

[0067] The absorbent core 11 is a component that absorbs and retains excretory fluids such as urine, and is formed, for example, from liquid-absorbent fibers such as pulp fibers incorporating superabsorbent polymers (SAP). Alternatively, the outer peripheral surface of the absorbent core 11 may be covered by a liquid-permeable sheet component (core-covering sheet 11b) such as thin paper or nonwoven fabric. In this embodiment, the absorbent core 11 has a narrowing portion 11c between its front and rear ends in the longitudinal direction, which narrows in the left-right direction. Figure 5A It has an approximate hourglass shape when viewed from above, as shown. The narrowing portion 11c is the part that is sandwiched between the wearer's legs when the diaper 1 is worn. By shortening the length (narrowing the width) of this portion in the lateral direction, the absorbent core 11 can easily fit the wearer's crotch. In addition, the absorbent core 11 can be composed of a single layer in the thickness direction, or it can be composed of two or more overlapping layers.

[0068] The top sheet 12 is a liquid-permeable sheet, such as a hydrophilic hot-air nonwoven fabric or spunbond nonwoven fabric. In this embodiment, such as... Figure 5B In that case, it is set to cover the entire area of ​​the skin side of the absorbent core 11.

[0069] The substrate 13 has a double-layer structure consisting of a liquid-impermeable sheet 13a and a hydrophobic outer sheet 13b disposed on the non-skin side. The liquid-impermeable sheet 13a is a so-called leak-proof sheet used to prevent excrement absorbed by the absorbent core 11 from leaking to the non-skin side. For example, a resin film can be used as the liquid-impermeable sheet 13a, and a soft, hydrophobic nonwoven fabric can be used as the outer sheet 13b. The liquid-impermeable sheet 13a and the outer sheet 13b are configured to cover the entire non-skin side of the absorbent core 11.

[0070] On both sides of the absorbent body 10 in the left-right direction, a pair of leak-proof wall portions 15 are provided along the longitudinal direction (the length direction of the absorbent body 10). In this embodiment, the leak-proof wall portions 15 are formed by the aforementioned outer sheet 13b. Specifically, in the left-right direction (lateral direction), a portion of the outer sheet 13b extends outward relative to both ends of the absorbent core 11, and as shown... Figure 5BThe diaper is bent at multiple points on the skin side to form a pair of leak-proof wall portions 15. At the skin-side end (terminal portion) of the leak-proof wall portion 15, a leak-proof wall elastic member 16, such as a rubber thread, is installed in a state of elongation along the longitudinal direction (the length direction of the absorbent body 10). When the diaper 1 is worn, based on the elasticity of the leak-proof wall elastic member 16, the leak-proof wall portion 15 stands up towards the wearer's skin side and matches the wearer's crotch area.

[0071] Furthermore, on both sides of the absorbent body 10 in the left-right direction, the leg elastic members 17, such as rubber threads, are installed in a state of elongation along the longitudinal direction (the length direction of the absorbent body 10). When the diaper 1 is worn, based on the elasticity of the leg elastic members 17, the two sides of the absorbent body 10 contract, making it easy to match the wearer's leg circumference.

[0072] (Front side with component 30)

[0073] The front band member 30 is also the front waist section 30a that covers the wearer's abdominal side. For example... Figure 3 As shown, it has: a non-skin side sheet 32 ​​disposed at the non-skin side position in the thickness direction; a skin side sheet 31 laminated in such a way as to be adjacent to the skin side of the non-skin side sheet 32; and a waist elastic member 35 disposed between the skin side sheet 31 and the non-skin side sheet 32 ​​in the thickness direction.

[0074] Figure 6A This is an explanatory diagram showing the breakdown of the constituent components of diaper 1 in the thickness direction. Figure 6B Overlapping in the thickness direction Figure 6A A diagram illustrating the state of the constituent components of diaper 1. Additionally, in Figure 6A as well as Figure 6B In this context, the term "elastic component" is omitted. For example... Figure 6A as well as Figure 6B As shown, the front band member 30, from the non-skin side in the thickness direction toward the skin side, sequentially overlaps a non-skin side sheet 32, a skin side sheet 31, and a skin sheet 36 (absorbent body 10). The front band member 30 can be a two-layer structure consisting of the skin side sheet 31 and the non-skin side sheet 32, or it can have a three-layer or more structure, as is the case with the skin sheet 36, either partially or throughout the entire area of ​​the front band member 30. In the case where the sheet member is provided in the front band member 30 at a position closer to the skin side than the skin side sheet 31 or closer to the non-skin side sheet 32, it is preferable to arrange the sheet member in such a way that it only covers a portion of the skin side sheet 31 and the non-skin side sheet 32.

[0075] For the front strap member 30 of this embodiment, the skin side piece 31 and the non-skin side piece 32 are approximately the same size, but either the skin side piece 31 or the non-skin side piece 32 may be longer in the longitudinal direction. For example, the non-skin side piece 32 may also have a folded portion that folds back from the non-skin side to the skin side and from the front side to the rear side in the longitudinal direction. This folded portion covers a portion (upper end) of the skin side piece 31, thereby preventing the upper edge of the skin side piece 31 from digging into the wearer's skin.

[0076] like Figure 2 As shown, the skin-friendly side panel 31 and the non-skin-friendly side panel 32 are rectangular sheet components when viewed from above, and are formed, for example, from white SMS non-woven fabric. Furthermore, in diaper 1, the sheet component (non-woven fabric) constituting the non-skin-friendly side panel 32 is more hydrophilic than the sheet component (non-woven fabric) constituting the skin-friendly side panel 31. That is, the skin-friendly side panel 31 is made of a non-woven fabric with low hydrophilicity, and is also referred to as the "hydrophobic portion 31". In contrast, the non-skin-friendly side panel 32 is made of a non-woven fabric with higher hydrophilicity than the skin-friendly side panel 31, and is also referred to as the "hydrophilic portion 32".

[0077] The waist elastic member 35 is a stretchable member that can extend and retract in the left and right directions. In this embodiment, white rubber threads are used. Multiple waist elastic members 35 are arranged vertically between the skin side panel 31 and the non-skin side panel 32, and are installed in a state of extension in the left and right directions. Utilizing the elasticity of the waist elastic member 35, the front strap member 30 (front waist portion 30a) matches the wearer's abdominal waist.

[0078] The waist elastic member 35 can be installed using an adhesive such as a hot melt adhesive. For example, by applying a hot melt adhesive to the waist elastic member 35 and elongating it by a specified elongation ratio, the waist elastic member 35 can be installed by being sandwiched between the skin side piece 31 and the non-skin side piece 32. That is, the skin side piece 31 and the non-skin side piece 32 are bonded together with an adhesive through the waist elastic member 35.

[0079] Additionally, the front band member 30 has a skin-like surface 36. For example... Figure 3 As shown, the skin sheet 36 is a sheet member configured to cover the upper end (front end in the longitudinal direction) of the absorbent body 10 from the skin side, and functions as a cover. Therefore, when wearing the diaper 1, the upper edge of the absorbent body 10 can be prevented from digging into the wearer's skin. The skin sheet 36 is formed, for example, from SMS nonwoven fabric, and in this embodiment is light blue. Figure 3The skin sheet 36 in the diaper is configured to cover part of the skin side of the skin side sheet 31. In the diaper 1, the skin sheet 36 is part of the front sideband member 30 (front waistband 30a), but the skin sheet 36 can also be a separate member from the absorbent body 10 relative to the front sideband member 30.

[0080] Furthermore, the front strap member 30 is provided with multiple openings 30h. Each opening 30h is a through-hole extending through the front strap member 30 in the thickness direction; specifically, it is a through-hole extending through the skin-side sheet 31 and the non-skin-side sheet 32. In the portion with the skin-side sheet 36, it is a through-hole extending through the skin-side sheet 36, the skin-side sheet 31, and the non-skin-side sheet 32. By providing the openings 30h, the breathability of the front strap member 30 can be improved. In addition, the openings 30h are configured so that they can be visually identified from the non-skin-side side of the front strap member 30, making it easy for the user to associate the front strap member 30 with good breathability. Each opening 30h is, for example, a circle with a diameter of approximately 1 mm, but the shape and arrangement (number and style) of the openings 30h can be appropriately changed.

[0081] (Rear side with component 40)

[0082] The rear strap member 40 has a rear waistband 40a that covers the back of the wearer and a buttock cover 40b that covers the buttocks of the wearer. Specifically, in the vertical direction, the area overlapping with the side joint 1e (side 40sw) is the rear waistband 40a, and the portion lower than the side joint 1e is the buttock cover 40b. When wearing the diaper 1, the rear strap member 40 can cover a large area of ​​the wearer's buttocks with the buttock cover 40b. Alternatively, the rear strap member 40 does not necessarily have a buttock cover 40b and may be a rear strap member 40 consisting only of the rear waistband 40a.

[0083] The hip bra 40b is equipped with Figure 2 The white rubber filaments and other flexible elastic members 47 are shown. The flexible elastic members 47 are installed in an extended state between the skin side piece 41 and the non-skin side piece 42. Utilizing the elasticity exhibited by the flexible elastic members 47, when wearing the diaper 1, the buttock cover 40b of the back strap member 40 can easily match the wearer's buttocks and is difficult to roll up from the buttocks.

[0084] like Figure 3 As shown, it has: a non-skin side sheet 42 disposed at the non-skin side position in the thickness direction; a skin side sheet 41 laminated in such a way as to be adjacent to the skin side of the non-skin side sheet 42; and a waist elastic member 45 disposed between the skin side sheet 41 and the non-skin side sheet 42 in the thickness direction.

[0085] like Figure 6A as well as Figure 6BAs shown, the rear band member 40, like the front band member 30, consists of a non-skin side sheet 42, a skin side sheet 41, and a skin sheet 46 (absorbent body 10) sequentially overlapping from the non-skin side in the thickness direction toward the skin side. The rear band member 40 can be a two-layer structure consisting of the skin side sheet 41 and the non-skin side sheet 42, or it can have a three-layer or more structure, for example, as in the portion where the skin sheet 46 is provided, either partially or throughout the entire area of ​​the rear band member 40. In the case where the sheet member is provided in the rear band member 40 at a position closer to the skin side than the skin side sheet 41 or closer to the non-skin side sheet 42, it is preferable to arrange the sheet member in such a way that it only covers a portion of the skin side sheet 41 and the non-skin side sheet 42.

[0086] In this embodiment, the skin-side piece 41 and the non-skin-side piece 42 of the rear strap member 40 are approximately the same size, but either the skin-side piece 41 or the non-skin-side piece 42 may be longer in the longitudinal direction. For example, the non-skin-side piece 42 may also have a folded portion that folds back from the non-skin side to the skin side and from the front side to the rear side in the longitudinal direction. This folded portion covers a portion (upper end) of the skin-side piece 41, thereby preventing the upper edge of the skin-side piece 41 from digging into the wearer's skin.

[0087] like Figure 2 As shown, the skin-friendly side panel 41 and the non-skin-friendly side panel 42 are rectangular sheet components when viewed from above, and are formed, for example, from white SMS non-woven fabric. Furthermore, in diaper 1, the sheet component (non-woven fabric) constituting the non-skin-friendly side panel 42 is more hydrophilic than the sheet component (non-woven fabric) constituting the skin-friendly side panel 41. That is, the skin-friendly side panel 41 is made of a non-woven fabric with low hydrophilicity, and is also referred to as the "hydrophobic portion 41". In contrast, the non-skin-friendly side panel 42 is made of a non-woven fabric with higher hydrophilicity than the skin-friendly side panel 41, and is also referred to as the "hydrophilic portion 42". Details regarding the hydrophilicity of each panel 41 and 42 and the functions based on the difference in hydrophilicity will be explained later.

[0088] The waist elastic member 45 is a telescopic member that can stretch and contract in the left and right directions. In this embodiment, white rubber threads are used. Multiple waist elastic members 45 are arranged vertically between the skin-friendly side panel 41 and the non-skin-friendly side panel 42, and are installed in a state of extension in the left and right directions. Utilizing the elasticity exhibited by this waist elastic member 45, the rear strap member 40 (rear waist portion 40a) matches the wearer's back waist. The waist elastic member 45 can be installed in the same way as the waist elastic member 35 of the front strap member 30.

[0089] Additionally, the rear band member 40 has a skin-like surface 46. For example... Figure 3As shown, the skin sheet 46 is a sheet member arranged to cover the upper end (rear end in the longitudinal direction) of the absorbent body 10 from the skin side, and functions as a cover. Therefore, when wearing the diaper 1, the upper edge of the absorbent body 10 can be prevented from digging into the wearer's skin. The skin sheet 46 is formed, for example, from SMS nonwoven fabric, and is light blue in this embodiment. Figure 3 The skin sheet 46 in the diaper is configured to cover a portion of the skin side of the skin side sheet 41. In the diaper 1 of this embodiment, the skin sheet 46 is part of the back band member 40 (back waistband 40a), but the skin sheet 46 may also be a separate member from the absorbent body 10 relative to the back band member 40.

[0090] Furthermore, the rear strap member 40 is provided with multiple openings 40h. Each opening 40h is a through-hole extending through the rear strap member 40 in the thickness direction; specifically, it is a through-hole extending through the skin-side sheet 41 and the non-skin-side sheet 42. In the portion where the skin-side sheet 46 is provided, it is a through-hole extending through the skin-side sheet 46, the skin-side sheet 41, and the non-skin-side sheet 42. By providing the openings 40h, the breathability of the rear strap member 40 can be improved. Additionally, by arranging the openings 40h so that they can be visually identified from the non-skin-side side of the rear strap member 40, it is easy for the user to associate the rear strap member 40 with good breathability. Each opening 40h is, for example, a circle with a diameter of approximately 1 mm, but the shape and arrangement (number and style) of the openings 40h can be appropriately changed.

[0091] <Regarding the hydrophilicity of each piece>

[0092] Here, the hydrophilicity of each piece will be explained. In diaper 1, the skin side pieces 31 and 41, and the skin face pieces 36 and 46 constituting the waistband 20 (front strap member 30 and back strap member 40) are made of hydrophobic nonwoven fabric, while the non-skin side pieces 32 and 42 are made of hydrophilic nonwoven fabric with a higher hydrophilicity than the hydrophobic nonwoven fabric. In addition, the outer cover piece 13b constituting the absorbent body 10 is also made of hydrophobic nonwoven fabric.

[0093] The hydrophilic nonwoven fabric of this embodiment improves hydrophilicity by applying a prescribed oil to the hydrophobic nonwoven fabric (hydrophilic treatment). The oil used in the hydrophilic treatment can be, for example, anionic or nonionic oils and their formulations, commercially available oils effective as anti-static agents for fibers. By adding these oils to an oil bath and applying them using an oiling roller or the like, the hydrophilicity of the hydrophobic nonwoven fabric is improved, thus obtaining a hydrophilic nonwoven fabric. However, hydrophilic nonwoven fabrics can also be formed using other methods. For example, a hydrophilic nonwoven fabric can also be obtained by using highly hydrophilic fibers to manufacture the nonwoven fabric.

[0094] In this embodiment, the entire nonwoven fabric constituting the non-skin side panels 32 and 42 is hydrophilically treated to increase the overall hydrophilicity of the non-skin side panels 32 and 42. However, it is also possible to increase the hydrophilicity only in a portion of the non-skin side panels 32 and 42. For example, by performing hydrophilic treatment only in a portion of the non-skin side panels 32 and 42, the sheet member is designed to have portions with high hydrophilicity and portions with low hydrophilicity in a localized manner.

[0095] The hydrophilicity of each sheet can be evaluated by measuring the contact angle when ion-exchanged water comes into contact with the surface of each sheet. Specifically, if the contact angle between the hydrophilic nonwoven fabric and the ion-exchanged water is smaller than that between the hydrophobic nonwoven fabric and the ion-exchanged water, then the hydrophilic nonwoven fabric has higher hydrophilicity than the hydrophobic nonwoven fabric. As the hydrophilic nonwoven fabric (non-skin side sheets 32, 42) used in this embodiment, the contact angle with ion-exchanged water is preferably less than 90 degrees or less, more preferably less than 50 degrees. On the other hand, as the hydrophobic nonwoven fabric (skin side sheets 31, 41 and skin side sheets 36, 46), the contact angle with ion-exchanged water is preferably more than 90 degrees, more preferably more than 120 degrees.

[0096] The contact angle can be measured, for example, using the MCA-J contact angle measuring instrument manufactured by Kyowa Interface Science Co., Ltd., by the following method: First, approximately 20 picoliters of ion-exchanged water is dropped onto the surface of the fibers constituting the sheet component (the sheet to be measured). Then, the contact angle is immediately measured using the aforementioned contact angle measuring instrument. Measurements are performed at multiple locations (e.g., 5 or more) on the surface of the sheet to be measured, and the average value of these measurements is taken as the contact angle. The ambient temperature for the measurement is set to 22°C.

[0097] Alternatively, the test piece can be photographed from the cross-sectional direction of the test piece after ion-exchange water has been dripped on it. The photographed image can be analyzed to determine the angle between the droplet of ion-exchange water and the test piece, thereby determining the contact angle.

[0098] <On water absorption and transpiration>

[0099] The diaper 1, made of hydrophilic nonwoven fabric, has the functions of absorbing sweat and evaporating moisture. The mechanism by which the diaper 1 absorbs moisture such as sweat from the wearer's skin and evaporates the absorbed moisture into the atmosphere will be explained using the back waistband 40a, but the same applies to the front waistband 30a. Figures 7A to 7C This diagram illustrates the basic principles of moisture absorption and evaporation in diaper 1. Figures 7A to 7C The cross-section of the rear waist section 40a, which constitutes the diaper 1, is shown schematically.

[0100] First, if the wearer is wearing diaper 1, the skin-covering panel 46 in the back waist area 40a contacts the wearer's skin; in the area without the skin-covering panel 46, the skin-covering side panel 41 contacts the wearer's skin. Additionally... Figures 7A to 7C The overlapping portion of the non-skin side piece 42, skin side piece 41, and skin face piece 46 is shown when the rear waist portion 40a of the rear belt member 40 is viewed from the non-skin side.

[0101] As described above, the skin face sheet 46 and the skin side sheet 41 are hydrophobic nonwoven fabrics. In this embodiment, the skin side sheet 41 and the skin face sheet 46 are made of SMS nonwoven fabric, containing meltblown fibers with a finer fiber diameter than spunbond fibers. Therefore, there is a portion where fine meltblown fibers are densely wound and the distance between the fibers is reduced. The higher the density of the fibers constituting the hydrophobic nonwoven fabric, the more easily capillary action occurs. Therefore, during the wearing of the diaper 1, capillary action occurs in the skin side sheet 41 and the skin face sheet 46, easily absorbing moisture such as sweat from the wearer's skin.

[0102] Next, as Figure 7B In this way, the moisture absorbed by the skin-side sheet 41 or the skin-side sheet 46 is transferred to the non-skin-side sheet 42 (hydrophilic nonwoven fabric) that is laminated adjacent to the non-skin-side of the skin-side sheet 41. Additionally, as... Figure 7B As shown, regarding the portion with skin-facing sheet 46, moisture absorbed by skin-facing sheet 46 is transferred to non-skin-facing sheet 42 via skin-facing side sheet 41. Skin-facing side sheet 41 and skin-facing sheet 46 are hydrophobic non-woven fabrics, while non-skin-facing side sheet 42 is hydrophilic non-woven fabric. Therefore, a difference in hydrophilicity (hydrophilic gradient) is created between the hydrophobic and hydrophilic sheets. This is because moisture easily moves from the less hydrophilic skin-facing side sheet 41 and skin-facing sheet 46 to the more hydrophilic non-skin-facing side sheet 42. Consequently, moisture is difficult to retain on the skin-facing side sheet 41, which is in contact with the wearer's skin, while moisture is easily retained on the non-skin-facing side sheet 42, which is not in contact with the wearer's skin.

[0103] Moisture retained in the non-skin side plate 42 evaporates from the non-skin side of the non-skin side plate 42 into the atmosphere. For example... Figure 7C As shown, when the non-skin side piece 42 is part of the material forming the rear waist portion 40a closest to the non-skin side, the entire surface of the non-skin side piece 42 faces the atmosphere, the area of ​​the interface between the non-skin side piece 42 and the atmosphere becomes larger, making it easier for moisture to evaporate.

[0104] Furthermore, it is preferable that the skin-side sheet 41, which is the hydrophobic portion, and the non-skin-side sheet 42, which is the hydrophilic portion, each have fibers, and the fiber density of the skin-side sheet 41 is lower than that of the non-skin-side sheet 42. For the diaper 1 of this embodiment, the fiber density of the skin-side sheet 41 is 15 g / m². 2 The fiber density of the non-skin side sheet is 18g / m². 2 In this way, by setting a lower fiber density for the hydrophilic portion (non-skin side panel 42) and the hydrophobic portion (skin side panel 41) on the skin side compared to the non-skin side of the diaper 1, it is easier to promote the transfer of moisture from the hydrophobic portion to the hydrophilic portion. In the diaper 1, the fiber density of the skin side panel 46, located on the skin side compared to the skin side panel 41, is set lower than the fiber density of the non-skin side panel 42. Specifically, the fiber density of the skin side panel 46 is 15 g / m². 2 This facilitates the transfer of moisture from the wearer's sweat from the skin-facing panel 46 and the skin-facing side panel 41 to the non-skin-facing side panel 42.

[0105] In this way, within the waistband 20 of the diaper 1, moisture absorbed from the wearer's skin by the hydrophobic nonwoven fabric is transferred to the hydrophilic nonwoven fabric on the non-skin side, and released from the non-skin side surface of the hydrophilic nonwoven fabric into the atmosphere. That is, it can absorb moisture and effectively evaporate into the atmosphere. Therefore, moisture is less likely to come into contact with the wearer's skin, inhibiting skin problems such as rashes caused by dampness or causing discomfort to the wearer.

[0106] In the rear waistband 40a, in the area that overlaps with a pair of side joints 1e in the vertical direction, at least a portion of the surface closest to the non-skin side is provided with a hydrophilic portion of hydrophilic nonwoven fabric. In the diaper 1 of this embodiment, the non-skin side of the rear waistband 40a is composed of a hydrophilic non-skin side sheet 42 throughout its entire area, thus the entire area of ​​the non-skin side of the rear waistband 40a is a hydrophilic portion. In addition, a skin side sheet 41, which is a hydrophobic portion, is laminated adjacent to the skin side of the non-skin side sheet 42, which is a hydrophilic portion. Furthermore, in the rear waistband 40a, at a position closer to the skin side than the skin side sheet 41, a portion is provided with a skin sheet 46 laminated adjacent to the skin side sheet 41. Therefore, the structure becomes as follows: In the hydrophobic skin face sheet 46 and skin side sheet 41, moisture such as sweat is absorbed from the wearer's skin. According to the hydrophilic gradient, the movement of moisture to the non-skin side sheet 42 is easily promoted. The moisture that moves from the skin side to the non-skin side sheet 42 is easily evaporated from the hydrophilic non-skin side sheet 42 on the surface closest to the non-skin side.

[0107] <Regarding the colored section S>

[0108] Diaper 1 has a colored portion S. "Colored" refers to any color other than colorless transparent and white. White refers to, for example, a color represented as "N9.5" according to the Munsell color system or a color represented as "255,255,255" according to the RGB color space (so-called pure white). Furthermore, colors with a color difference of less than 12 from pure white are also included in white. For measuring the color difference of white, a color difference meter manufactured by Konica Minolta can be used, for example, with a C-light source (International Commission on Illumination (CIE) specification) as the light source. The diameter of the measuring window in this case is 40 mm. The color difference is ΔL, Δa, and Δb relative to the (L*a*b*) color space of a white reference plate. The color difference relative to the white reference plate can be calculated by separately measuring the lab value of the white reference plate and the lab value of the object sample. The white reference plate is set to lab0 according to (X93.19, Y95.20, Z112.28). Here, L represents the value of brightness, and a and b are the chromaticity coordinates in the plane. If the Lab values ​​of the white reference plate are set to L0, a0, and b0, and the L1, a1, and b1 of the object sample are set, then calculations can be performed according to ΔL = L0 - L1, Δa = a0 - a1, and Δb = b0 - b1.

[0109] In this embodiment, the colored portion S of the diaper 1 consists of the skin-surface sheet 36 of the front waistband 30a and the skin-surface sheet 46 of the rear waistband 40a. Both skin-surface sheets 36 and 46 are light blue sheet components. Alternatively, skin-surface sheets 36 and 46 can be sheets made by coloring a formed white nonwoven fabric to light blue, or sheets made by forming light blue fibers into a nonwoven fabric shape. Furthermore, while skin-surface sheets 36 and 46 can be light blue components covering the entire area, this is not a limitation. Alternatively, a portion of skin-surface sheets 36 and 46 can be designated as a colored portion.

[0110] <Regarding the color change of the colored part S>

[0111] Previously, absorbent items such as white disposable diapers were widely known. Figure 8A This is a diagram illustrating the color change of the water absorption area WW in the white part W. Figure 8A The following conditions are shown: A piece of fabric constituting the waistband of a typical white disposable diaper is used as a white sample. A predetermined amount of water is dripped onto the white portion W of the white sample, forming a water-absorbing area WW. If the colors of the unabsorbed white portion W and the water-absorbing area WW of the white sample are compared, then... Figure 8AAs shown, the color of the moisture-absorbing area WW is paler than the white area W that has not absorbed moisture, and the color change between the white area W and the moisture-absorbing area WW is not readily apparent. When the white sheet material is wetted, the moisture penetrates into the gaps between the fibers constituting the sheet material, reducing the surface roughness and making diffuse reflection of light less likely. Furthermore, in the moisture-absorbing area WW, light easily passes through the sheet material, making the white area paler and more transparent than the white area W that appears white due to diffuse reflection. Therefore, even if an absorbent material possesses the aforementioned sweat-absorbing function, it is difficult to perceive the extent of sweat absorption from the outside. Especially when the wearer of absorbent clothing is an infant or a patient who has difficulty communicating, it is difficult for the wearer to realize the absorbency of the clothing or to convey its effect to others. Therefore, even if white absorbent clothing has the function of absorbing sweat, it lacks the color change before and after absorbing sweat, making it difficult for the wearer or the person helping the wearer put on the absorbent clothing (hereinafter also referred to as "wearer, etc.") to realize the function of absorbing sweat.

[0112] In contrast, diaper 1, by having a colored part S, makes it easy for those around to perceive the absorption of sweat based on the change in the concentration of the color of the colored part S. Figure 8B This is a diagram illustrating the color change of the water absorption region SW in the colored part S. Figure 8B The following state is shown: A light blue skin patch 46 of this embodiment is used as a colored sample of the colored portion S. A predetermined amount of water is dripped onto the colored portion S of the colored sample to form a water-absorbing area SW. For example... Figure 8B As shown, if we compare the colors of the unabsorbed colored portion S and the water-absorbed region SW of a colored sample, then... Figure 8B As shown, the color of the moisture-absorbing area SW appears significantly darker than the color of the unabsorbed colored area S. Like the white sheet material, when the colored sheet material is wetted, the water penetrates into the gaps between the fibers constituting the sheet material, reducing the surface roughness and making diffuse reflection of light less likely. Therefore, unlike the white sheet material, the colored sheet material, due to its color, makes it more difficult for light to pass through. Consequently, less diffusely reflected light and less transmitted light are observed, while more positively reflected light is observed. Thus, the color of the moisture-absorbing area SW appears darker than the color of the unabsorbed colored area S. In other words, if the colored area S of the diaper 1 absorbs water, its color appears darker than before absorption.

[0113] As described above, the back waistband 40a of the diaper 1 has a skin-friendly side panel 41 as a hydrophobic portion and a non-skin-friendly side panel 42 as a hydrophilic portion. The non-skin-friendly side panel 42 is at least a portion of the non-skin-friendly side of the back waistband 40a. That is, the non-skin-friendly side panel 42 is made of a material that constitutes at least a portion of the non-skin-friendly side. Additionally, a light blue (colored) skin-friendly side panel 46 is provided, constituting the colored portion S on the back (one side). Furthermore, when viewed from the non-skin-friendly side... Figure 1 In the diaper 1 shown, at least a portion of the skin side piece 41 overlaps with at least a portion of the non-skin side piece 42, and at least a portion of the non-skin side piece 42 overlaps with at least a portion of the skin side piece 46. For the diaper 1 of this embodiment, as... Figure 4 As shown, when viewing diaper 1 along the front-to-back direction, the skin side panel 41 and the non-skin side panel 42 are the same size and overlap over approximately the entire area. Furthermore, the skin side panel 41, the non-skin side panel 42, and the skin surface panel 46 overlap. Moreover, when viewing diaper 1 from the non-skin side in a state where it has absorbed the wearer's sweat, the color of the skin surface panel 46 (colored part S) is visually discernible.

[0114] As described above, the back waistband 40a of the diaper 1 retains moisture and allows it to evaporate through the non-skin side panel 42, which is a hydrophilic part. Furthermore, when the diaper 1 is viewed from the non-skin side, a light blue skin-facing panel 46, serving as a colored portion S, is provided at the position overlapping the non-skin side panel 42. The color of the skin-facing panel 46 becomes more pronounced as it absorbs sweat. Wearers who can visually identify the color of this skin-facing panel 46 can recognize that this is the portion of the skin-facing panel 46 (colored portion S) that overlaps at least with the non-skin side panel 42 when the diaper 1 is viewed from the non-skin side, and that it is the portion that absorbs the wearer's sweat and allows its moisture to evaporate. Therefore, even in situations where the wearer, such as an infant, cannot express their feelings about wearing the diaper 1, those around them, such as the person helping the wearer put on the diaper 1, can visually recognize the color intensity of the colored area S. This easily creates the impression that the colored area S (skin side 46) of the diaper 1 is the part that absorbs the wearer's sweat, and that it has the function of retaining and evaporating moisture in areas where the color is more visually apparent. Furthermore, since the wearer can visually perceive the wearer's sweating, the color of the colored area S can indicate whether the wearer, such as an infant who cannot express themselves verbally, is feeling hot. Moreover, by making the non-skin side 42, which is a hydrophilic nonwoven fabric, the diaper 1 allows moisture from the wearer's sweat to easily diffuse in the planar direction within the non-skin side 42, creating a larger area where the color intensity changes due to moisture. Therefore, it is easier for the wearer to perceive the color intensity changes of the skin side 46. In addition, by providing a skin patch 46 as a colored part S on the back (rear side) where sweating is likely to occur, it is easy for the wearer to recognize the change in the color concentration of the skin patch 46 due to sweat absorption.

[0115] In this embodiment, the colored portion S is set to light blue, but the color of the colored portion S is not limited to light blue; it can be any color. However, to make the function of absorbing sweat and other moisture visible, it is preferable to set the color of the colored portion S to light blue or a cool color such as aquamarine. By setting the color of the colored portion S to a cool color, it is easy for the wearer to associate it with water or coolness. Furthermore, it is even more preferable that the wearer can visually identify the color of the colored portion S before and after the sweat-absorbing part of the back waistband 40a. If the wearer can recognize the sweat-absorbing part before absorbing sweat, they can understand in advance that the diaper 1 has a sweat-absorbing function.

[0116] The front waistband 30a of the diaper 1, like the back waistband 40a, has a skin-friendly side panel 31 as a hydrophobic portion and a non-skin-friendly side panel 32 as a hydrophilic portion. The non-skin-friendly side panel 32 is at least a portion of the non-skin-friendly side of the front waistband 30a. Additionally, it has a light blue (colored) skin-friendly side panel 36 that forms the colored portion S of the front (other side). Furthermore, when viewed from the non-skin-friendly side... Figure 1 In the diaper 1 shown, at least a portion of the skin side panel 31 overlaps with at least a portion of the non-skin side panel 32, and at least a portion of the non-skin side panel 32 overlaps with at least a portion of the skin side panel 36. For the diaper 1 of this embodiment, as... Figure 4 As shown, when viewing diaper 1 along the front-to-back direction, the skin side panel 31 and the non-skin side panel 32 are the same size and overlap over approximately the entire area. Furthermore, the skin side panel 31, the non-skin side panel 32, and the skin surface panel 36 overlap. Moreover, when viewing diaper 1 from the non-skin side in a state where it has absorbed the wearer's sweat, the color of the skin surface panel 36 (colored area) is visually discernible.

[0117] In this way, not only the back waist section 40a, but also the front waist section 30a, by setting the skin-face sheet 36 as a colored part S at the position overlapping with the non-skin-face sheet 32, makes it easy for the wearer to recognize that this is a disposable diaper with sweat-absorbing function, and that the area where the skin-face sheet 36 is set has the function of absorbing the moisture of sweat and causing it to evaporate.

[0118] Furthermore, preferably, the upper ends of the rear skin sheet 46 (colored portion S) and the front skin sheet 36 (colored portion S) are located at different positions in the front-to-back direction. The diaper 1 of this embodiment is as follows... Figure 4As shown, the upper end of the rear skin panel 46 is positioned higher than the upper end of the front skin panel 36. This allows for effective sweat absorption by configuring the colored portion S, which corresponds to the wearer's body shape or posture, and makes it easy for the wearer to perceive changes in the color intensity of the colored portion S due to sweat absorption. Furthermore, by differentiating the positions of the colored portions S at the front and back, the wearer can easily distinguish the front and back of the diaper 1.

[0119] The front waist portion 30a and the back waist portion 40a of the diaper 1 are constructed in the same way. Therefore, the following mainly describes the back waist portion 40a, but the same applies to the front waist portion 30a.

[0120] Furthermore, preferably, in the rear waist portion 40a, the colored portion S is positioned above the absorbent core 11. For example... Figure 4 As shown, on the rear side in the front-to-back direction, the light blue skin-covering sheet 46 of the rear waistband 40a is positioned above the absorbent core 11. Since the absorbent core 11 is a component for absorbing liquids (excrement), it is not limited to urine and other excrement, but also absorbs sweat. In contrast, the skin-covering sheet 46 is positioned above the absorbent core 11 as a colored component S. Therefore, based on the color intensity change of the skin-covering sheet 46 due to sweat absorption, the wearer can easily visually identify the portion of the diaper 1 that absorbs the wearer's sweat in the area above the absorbent core 11. Thus, in areas where the color appears more intense, it easily creates the impression that the diaper absorbs the wearer's sweat and causes the absorbed sweat moisture to evaporate. Furthermore, the diaper 1 may have the entire area of ​​the skin-covering sheet 46 positioned above the absorbent core 11, but this is not an limitation. It is sufficient to provide at least a portion of the colored part S at a position above the absorbent core 11, or the absorbent core 11 and a portion of the colored part S (skin patch 46) may overlap in the vertical direction.

[0121] Furthermore, preferably, in the rear waist portion 40a, the colored portion S is positioned above the liquid-impermeable sheet 13a. For example... Figure 4 As shown, on the rear side in the front-to-back direction, the light blue skin-colored panel 46 of the rear waist section 40a is positioned above the liquid-impermeable panel 13a. This makes the area above the liquid-impermeable panel 13a, which absorbs the wearer's sweat, easily visible, creating the impression that the area with a darker color absorbs the wearer's sweat and allows the absorbed sweat to evaporate.

[0122] Furthermore, preferably, the upper end of the colored portion S is positioned below the upper end of the rear waist portion 40a. For example... Figure 1As shown, for diaper 1, the upper end of the skin-facing panel 46 is located below the upper end of the back waistband 40a (back belt member 40). Therefore, when the back waistband 40a absorbs the wearer's sweat, the upper end of the back waistband 40a becomes a different color or a different shade from the skin-facing panel 46. This easily gives the wearer the impression that the upper end of the back waistband 40a has not absorbed the wearer's sweat, making it easier for the wearer to touch or grasp the upper end of the back waistband 40a.

[0123] Preferably, like diaper 1, the colored portion S is located closer to the skin than the non-skin side panel 42, which is the hydrophilic portion. In diaper 1, the skin-facing panel 46 is a light blue colored portion S located closer to the skin than the non-skin side panel 42. If the back waistband 40a absorbs sweat, the color of the skin-facing panel 46 (colored portion) appears more intense. Furthermore, due to the moisture in sweat, the distance between the skin-facing panel 46 and the adjacent components in the thickness direction tends to shorten, thus the color intensity of the skin-facing panel 46 becomes more concentrated, making it easier for the wearer to perceive the diaper 1 absorbing the wearer's sweat.

[0124] Furthermore, when the colored portion S is positioned closer to the skin than the hydrophilic portion (non-skin side plate 42), it is preferable that the brightness of the colored portion S is lower than the brightness of the hydrophilic portion. That is, it is preferable that the brightness of the skin side plate 46 is lower than the brightness of the non-skin side plate 42. For example... Figure 6A As shown, in the diaper 1 of this embodiment, the light blue skin side panel 46 has a lower brightness than the white non-skin side panel 42. Therefore, since the color of the skin side panel 46 can be easily identified by visual observation through the non-skin side panel 42, the wearer can easily judge the absorbency of the diaper 1 by the change in the intensity of the color of the skin side panel 46.

[0125] The luminance (L value) of each piece can be measured, for example, using a commercially available colorimeter (CR-300 colorimeter manufactured by Konica Minolta Co., Ltd.) on a white calibration plate (CR-A43 (L value 96.7) manufactured by Konica Minolta Co., Ltd.). The higher the measured luminance (L value), the brighter the piece appears. Furthermore, it is preferable to cut multiple samples of a specified size from each piece and compare the average of the measured L values.

[0126] Preferably, the light transmittance of at least a portion of the non-skin side panel 42 constituting the rear waistband 40a, which is closest to the non-skin side, is 50% or more. In cases where the colored portion S is positioned closer to the skin side than the non-skin side panel 42, as in diaper 1, the wearer or others can easily visually identify the color of the colored portion S through the non-skin side panel 42.

[0127] The absorbent core 10 is a section where multiple components overlap, and it is thicker than the front strap component 30 and the rear strap component 40. Therefore, the section with the absorbent core 10 becomes the part where the wearer is prone to sweating during wear. For example... Figure 4 As shown, when viewing the diaper 1 from the non-skin side, it is preferable that the skin-side sheet 46 of the colored portion S has a portion overlapping with the absorbent body 10. By having the absorbent body 10 overlap with the skin-side sheet 46, it is easier for the wearer to perceive the change in color intensity of the skin-side sheet 46 due to increased sweat absorption.

[0128] Furthermore, preferably, such as Figure 3 As shown, in the thickness direction of the rear waist portion 40a, the lower end of the skin panel 46 has a lower non-bonding portion 46nd that is not bonded to the skin panel of the absorbent body 10 adjacent to the skin panel 46. Specifically, the lower non-bonding portion 46nd of the skin panel 46 is not coated with adhesive, and therefore, the lower non-bonding portion 46nd is not fixed to the absorbent body 10. By providing the lower non-bonding portion 46nd, if the skin panel 46 absorbs moisture, the distance between the unfixed lower non-bonding portion 46nd of the skin panel 46 and the wearer's skin is easily reduced. By bringing the wearer's skin closer to the lower non-jointed portion 46nd, the skin patch 46 absorbs the wearer's sweat more effectively, and the color intensity of the skin patch 46 appears to change more significantly. This makes it easier for the wearer to visually identify the part of the back waist circumference 40a that absorbs the wearer's sweat. Thus, in areas that appear to have a darker color, it is easy to create the impression that the absorbed sweat can be absorbed and the moisture from the absorbed sweat can evaporate.

[0129] Furthermore, preferably, on one side of the diaper 1 in the left-right direction, the side end of the colored portion S is located further outward than the side joint portion 1e on the other side. The diaper 1 of this embodiment is as follows... Figure 1 As shown, the side end of the skin-surface patch 46, which is the colored part S, is located on the outer side of the side joint 1e. Specifically, the skin-surface patch 46 extends from one side end of the diaper 1 in the left-right direction to the other side end. The skin-surface patch 46, together with the skin-surface side patch 41 and the non-skin-surface side patch 42, joins the front waistband 30a at the side joint 1e on one side and the side joint 1e on the other side. Since the outer part of the skin-surface patch 46 in the left-right direction is not in direct contact with the wearer's skin, the color change is mostly not visible even when the back waistband 40a absorbs sweat. Therefore, by comparing the color of the area on the skin-surface patch 46 that is on the outer side in the left-right direction of the side joint 1e and the area that is on the inner side in the left-right direction of the side joint 1e, the wearer can easily perceive the difference in the visible way of color caused by sweat absorption.

[0130] For the colored portion S, if the rear waist portion 40a contains moisture, it is visually perceived as having a darker color than before it contained moisture. In this case, it is preferable that the area of ​​the darker color has a first colored portion S1 that is visually perceived as having a predetermined concentration and a second colored portion that is visually perceived as having a lighter color than the first colored portion S1. Figure 9 This is an enlarged cross-sectional view of a portion of the rear waistband 40a. For example, the diaper 1 has multiple waistband elastic members 45 between the skin side panel 41 and the non-skin side panel 42, and with the lateral stretching and contraction of these waistband elastic members 45, pleats with concave and convex shapes in the thickness direction are formed in the rear waistband 40a. Figure 9 As shown, when the pleated back waist portion 40a is viewed from the non-skin side, the portion closest to the skin is visually identified as the first colored portion S1, with a predetermined color intensity. On the other hand, the portion closer to the non-skin side than the first colored portion S1 is visually identified as the second colored portion S2, which is lighter in color than the first colored portion S1. In this way, by utilizing the difference in color intensity between the first colored portion S1 and the second colored portion S2, the wearer can easily recognize the color of the colored portion S.

[0131] As described above, the rear waistband portion 40a (rear belt member 40) has a plurality of openings 40h extending through the thickness direction. Preferably, when viewed from the non-skin side of the rear waistband portion 40a, the openings 40h overlap with the colored portion S (skin surface 46). By overlapping with the openings 40h, the rear waistband portion 40a absorbs moisture from sweat, making the color of the colored portion S appear more intense, and the uncolored openings 40h become more conspicuous. This allows the wearer to easily visually identify the openings 40h and readily assess the breathability of the diaper 1.

[0132] ===Other Implementation Methods===

[0133] The embodiments of the present invention have been described above. However, these embodiments are examples provided to facilitate understanding of the present invention and are not intended to limit the scope of the invention. Furthermore, the present invention can be modified and improved without departing from its concept, and its equivalents are naturally included.

[0134] In the above-described embodiment, colored portions S (light blue skin-like patches 36 and 46) are provided on both the front waist portion 30a and the rear waist portion 40a, but this is not a limitation. It is also possible to provide the colored portions S only on the front waist portion 30a, or only on the rear waist portion 40a. Furthermore, the entire area of ​​the front waist portion 30a and the entire area of ​​the rear waist portion 40a may be provided with colored portions S. Additionally, the front waist portion 30a and the rear waist portion 40a may each be configured to have only one colored portion S. For example, regarding the rear waist portion 40a, the colored portions S may not be provided in the central portion in the left-right direction, but a pair of colored portions S may be provided at the two outer ends of the central portion in the left-right direction. Alternatively, a portion of each component (skin facets 36 and 46) can be designated as the colored part S, and the portion of that component (skin facets 36 and 46) other than the colored part S can be set to white. The shape, size, and arrangement of the colored part S can be appropriately modified according to the wearer's body type, physique, or posture.

[0135] In the above embodiment, the skin-facing sheets 36 and 46, made of colored nonwoven fabric and positioned closer to the skin than the non-skin-facing sheets 32 and 42 (which are positioned closer to the skin than the hydrophilic non-skin-facing sheets 32 and 42), are designated as colored portions S, but this is not a limitation. It is also possible to designate part or all of the components of the hydrophobic skin-facing sheets 31 and 41, the hydrophilic non-skin-facing sheets 32 and 42, and the waist elastic members 35 and 45 as colored portions S, and to join the components in the front waist portion 30a and the rear waist portion 40a using a colored adhesive. When a colored adhesive is used, the adhesive becomes the colored portion S. Furthermore, multiple components can be designated as colored portions S. Additionally, if the skin-facing sheets 36 and 46 are not colored portions, they may not be necessary.

[0136] For example, the multiple waist elastic members 45 that overlap with the non-skin side panel 42 when viewed from the non-skin side of the diaper 1 can be designated as a light-colored portion S, while the non-skin side panel 42 can be designated as a white sheet member. In this case, if the elastic function of the waist elastic members 45 is maintained, and the waist elastic members 45 and the non-skin side panel 42 are pressed tightly together by the moisture of sweat, then less light passes through the portion of the non-skin side panel 42 overlapping with the colored waist elastic members 45, making the color of the waist elastic members 45 appear more intense. Furthermore, since the waist elastic members 45 are intermittently arranged in the vertical direction, it is easy to perceive the color difference between the portion with waist elastic members 45 and the portion without them. Therefore, the wearer can visually discern the color intensity changes of the waist elastic members 45 through the non-skin side panel 42, and can easily visually identify the portion of the diaper 1 that absorbs the wearer's sweat. Thus, in areas where the color appears more intense, it is easy to create the impression that the diaper absorbs the wearer's sweat and causes the absorbed sweat moisture to evaporate.

[0137] Alternatively, for example, the adhesive used to bond the non-skin side piece 42 and the skin side piece 41 can be a light blue adhesive. This light blue adhesive is used as the colored portion S at the location where it overlaps with the non-skin side piece 42 when the diaper 1 is viewed from the non-skin side. In this case, if the adhesive function between the non-skin side piece 42 and the skin side piece 41 is maintained, and the skin side piece 41 and the non-skin side piece 42 are pressed tightly together by sweat, less light transmits through the portion where the adhesive overlaps between the skin side piece 41 and the non-skin side piece 42, making the colored adhesive appear more intense. Furthermore, since the adhesive can be configured in any shape and placed in any location, the color difference between the portion with and without adhesive is easily discernible. Therefore, the wearer can visually identify the changes in the color concentration of the adhesive through the non-skin side panel 42, and easily identify the part of the diaper 1 that absorbs the wearer's sweat. Thus, in areas where the color appears to be darker, it is easy to give the impression that the diaper absorbs the wearer's sweat and causes the absorbed sweat to evaporate.

[0138] In the above embodiment, when viewed from the non-skin side of the diaper 1, the entire area of ​​the skin-covering sheets 36 and 46, which are the colored portions S, overlaps with the non-skin-covering sheets 32 and 42 of the hydrophilic portion and the skin-covering sheets 31 and 41 of the hydrophobic portion, but is not limited thereto. As long as at least a portion of the colored portion S overlaps with the hydrophilic portion, it is sufficient that at least a portion of the skin-covering sheets 36 and 46 overlaps with the non-skin-covering sheets 32 and 42; the skin-covering sheets 36 and 46 may not overlap with the skin-covering sheets 31 and 41. As described above, the non-skin-covering sheet 32 ​​of the hydrophilic portion has the function of retaining moisture from sweat and allowing it to evaporate. Therefore, the water absorbed by the non-skin side panel 32 of the hydrophilic part diffuses in a planar manner within the non-skin side panel 32. Thus, even when at least a portion of the skin panels 36 and 46 overlap when viewed from the non-skin side of the diaper 1, the area where at least a portion overlaps when viewed from the non-skin side has the function of absorbing the moisture of sweat and causing it to evaporate. The part of the diaper 1 that absorbs the wearer's sweat can be easily identified by visually based on the color density changes of the skin panels 36 and 46. Thus, in areas where the color appears to be darker, it is easy to give the impression that the diaper can absorb the wearer's sweat and cause the absorbed sweat moisture to evaporate.

[0139] It can also be configured as follows: the colored portion S has fibers like the skin-like sheet 46, and the colored portion S has a compression portion (not shown) that is compressed in the thickness direction of the back waistband portion 40a. The fiber density of the compression portion is higher, and therefore, according to the capillary effect, the compression portion becomes a part that absorbs moisture more easily. If the back waistband portion 40a absorbs moisture, the compression portion of the colored portion S becomes darker in color because it absorbs more moisture, making it easier for the wearer to visually identify the part of the diaper 1 that absorbs the wearer's sweat. Thus, in the area where the color appears darker, it easily creates the impression that it can absorb the wearer's sweat and cause the absorbed sweat moisture to evaporate.

[0140] Furthermore, the compression section of the colored portion S can also be configured such that the colored portion S and the adjacent member adjacent to the colored portion S in the thickness direction are compressed together in the thickness direction. That is, the diaper 1 can also have a compression section obtained by compressing the skin face sheet 46 and the skin side sheet 41. The compression section causes the fibers of the adjacent sheets in the thickness direction to entangle or melt, and the distance between the sheets is reduced. As a result, not only does the color of the colored portion S appear to be more intense, but it also facilitates the transfer of moisture between the skin face sheet 46 and the skin side sheet 41 of the colored portion S. For example, a compression section (melting section) obtained by compressing (melting) the skin face sheet 46, the skin side sheet 41 and the non-skin side sheet 42 in the thickness direction can also be provided, and the waist elastic member 45 provided between the skin side sheet 41 and the non-skin side sheet 42 can be installed to the rear waist portion 40 using multiple compression sections (melting sections).

[0141] In the above-described embodiments, openings 30h and 40h are provided that penetrate through the strip members 30 and 40 in the thickness direction, respectively, but this is not a limitation. Alternatively, the strip members 30 and 40 may not have openings, or they may have openings that only penetrate through the non-skin side pieces 32 and 42 of each strip member 30 and 40, while the skin side pieces 31 and 41 do not have openings.

[0142] The above embodiments have described a so-called underwear-type disposable diaper, but are not limited thereto. For example, it could also be like... Figure 10 Such as the so-called belt-type disposable diaper 2 (hereinafter also referred to as "diaper 2"). Figure 10 These figures illustrate other embodiments. Regarding diaper 2, the same reference numerals are used for parts common to the above embodiments, and a detailed description of the basic structure of diaper 2 is omitted.

[0143] The belt-type disposable diaper 2 has a front waistband 30a, a back waistband 40a, and an absorbent body (not shown). It is secured to the front waistband 30a by a fastening part 48 located on the back waistband 40a, thus becoming... Figure 10 The diaper 2 is shaped like underwear. It has a waist opening BH and a pair of leg openings LH. In this underwear-shaped diaper 2, the portion above the upper end of the leg openings LH is called the "waist area 20," and the portion below the upper end of the leg openings LH is called the "crotch area 50." The waist area 20 of the diaper 2 has a colored portion S. The colored portion S of the diaper 2 is an area where the skin side pieces 31 and 41, located at least a portion of the non-skin side pieces 32 and 42 that constitute the non-skin side of the diaper 2, are partially colored. When the waist area 20 absorbs the wearer's sweat, the color of the colored portion S appears to deepen. Therefore, the wearer or others can easily perceive that the waist area 20 of the diaper 2 absorbs sweat, and that the portion of the waist area 20 with the colored portion S absorbs the wearer's sweat and causes the absorbed sweat to evaporate.

[0144] exist Figure 10 In the strip-type disposable diaper 2 shown, the colored portion S, which colors a portion of the skin-side panels 31 and 41, has been described, but it is not limited to this. The colored portion S may also be provided on any of the components of the non-skin-side panels 32 and 42, or on the stretchable members (not shown) that extend and retract in the left and right directions provided on the waistbands 30a and 40a. In addition, the colored portion S may color the entire area of ​​each component of the skin-side panels 31 and 41, the non-skin-side panels 32 and 42, and the stretchable members of the waistbands 30a and 40a, or it may color only a portion of each component.

[0145] Explanation of reference numerals in the attached figures

[0146] 1. Diapers (disposable diapers, absorbent materials),

[0147] 1e Side joint (one side joint, the other side joint),

[0148] 2. Diapers (disposable diapers, absorbent items),

[0149] 10 Absorbent Subjects

[0150] 11 Absorbent core,

[0151] 11b core-coated wafer,

[0152] 12 top films,

[0153] 13 negatives,

[0154] 13a Impermeable Film (Leak-proof Film)

[0155] 13b outer casing,

[0156] 15. Leak-proof wall section.

[0157] 16. Leak-proof wall elastic components,

[0158] 17. Leg circumference elastic component,

[0159] 20 Waist area,

[0160] 30 Front side belt component,

[0161] 30a Front waist area,

[0162] 30h opening section,

[0163] 31. Skin side plate (hydrophobic region)

[0164] 32 non-skin side plates (hydrophilic part),

[0165] 35 waist elastic component,

[0166] 36 skin patches (the colored area on the other side),

[0167] 40 Rear side belt component,

[0168] 40a Rear waist area,

[0169] 40B hip bra

[0170] 40h opening section,

[0171] 41. Skin side plate (hydrophobic region)

[0172] 42. Non-skin side plates (hydrophilic area)

[0173] 45 waist elastic component,

[0174] 46 skin patches (one side with color),

[0175] 47. Bending elastic member,

[0176] 50. Lower groin area

[0177] BH waist opening,

[0178] LH leg opening,

[0179] S is the colored part.

Claims

1. An absorbent article having: absorbent core with liquid absorption properties; and A pair of waistband sections located on the non-skin side, closer to the absorbent core mentioned above. Its features are, The aforementioned absorbent articles have a colored portion. At least one of the aforementioned waist portions has a hydrophobic portion and a hydrophilic portion. The aforementioned hydrophilic portion is at least a part of the non-skin-facing side of the aforementioned waistline. When viewed from the non-skin side mentioned above At least a portion of the aforementioned hydrophobic portion overlaps with the aforementioned hydrophilic portion. At least a portion of the hydrophilic portion overlaps with the colored portion. The aforementioned absorbent materials have intersecting vertical and horizontal directions. The aforementioned absorbent core is located within the absorbent body. The aforementioned colored portion is a hydrophobic sheet member located on the skin side closer than the aforementioned hydrophilic portion and on the skin side closer than the aforementioned hydrophobic portion. The lower end of the aforementioned colored portion has a non-joining portion that does not join with the member adjacent to the aforementioned colored portion in the thickness direction of the aforementioned waist portion. The aforementioned colored portion has fibers, and the aforementioned colored portion has a compression portion that is compressed in the thickness direction of the aforementioned waist portion, in the aforementioned compression portion, the aforementioned colored portion and the adjacent member adjacent in the aforementioned thickness direction are compressed in the aforementioned thickness direction.

2. The absorbent article as claimed in claim 1, characterized in that, In the aforementioned waist section, the colored portion is located on the upper side of the aforementioned absorbent core.

3. The absorbent article as claimed in claim 2, characterized in that, A leak-proof sheet, located on the non-skin side of the absorbent core, is provided at a position that is impermeable to liquid. In the aforementioned waist section, the colored portion is positioned above the aforementioned leak-proof sheet.

4. The absorbent article as described in any one of claims 1 to 3, characterized in that, The upper end of the aforementioned colored portion is located at a position lower than the upper end of the aforementioned waist portion.

5. The absorbent article as claimed in claim 1, characterized in that, The aforementioned hydrophobic portion and the aforementioned hydrophilic portion each have fibers. The fiber density of the hydrophobic portion is lower than that of the hydrophilic portion.

6. The absorbent article as claimed in claim 1, characterized in that, When the waist area mentioned above contains moisture, the color of the colored area is visually perceived to be darker than before it contained moisture. Areas that are visually perceived as having a deep color have: The first colored portion of the color concentration that is visually recognized as a prescribed color; and The second colored portion that is visually perceived as being lighter in color than the first colored portion mentioned above.

7. The absorbent article as claimed in claim 1, characterized in that, The aforementioned hydrophobic portion is a hydrophobic portion on one side, the aforementioned hydrophilic portion is a hydrophilic portion on one side, and the aforementioned colored portion is a colored portion on one side. The other waist section mentioned above has a hydrophobic side and a hydrophilic side. The aforementioned hydrophilic portion is at least a part of the non-skin-facing side of the aforementioned waistline portion. The other side of the waist area mentioned above has a colored portion on the other side. When viewed from the non-skin side of the waistline mentioned above. The hydrophobic portion on the other side overlaps with at least a portion of the hydrophilic portion on the other side. The hydrophilic portion on the other side overlaps with at least a portion of the colored portion on the other side.

8. The absorbent article as claimed in claim 7, characterized in that, The upper ends of the colored portion on one side and the upper ends of the colored portion on the other side are located at different positions.

9. The absorbent article as claimed in claim 1, characterized in that, At one end and the other end in the aforementioned left-right direction, there are respectively a one-sided joining portion and a other-sided joining portion for joining the aforementioned one waist portion to the other waist portion. On one side of the aforementioned left-right direction, The side end of the aforementioned colored portion is located on the outer side of the aforementioned side joint portion.

10. The absorbent article as claimed in claim 1, characterized in that, The brightness of the colored portion is lower than that of the hydrophilic portion.

11. The absorbent article as claimed in claim 1 or 10, characterized in that, When viewed from the non-skin side, the colored portion overlaps with the absorbent body.

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