Absorbent articles and groups of absorbent articles

Abstract

To provide an absorbent article which allows an assistant for wearing to appropriately put an absorbent article on a wearer and to check whether the absorbent article is put at an appropriate position after putting.SOLUTION: An absorbent article (1) includes a mark part (20) for positioning on putting. The mark part includes a skin side mark part (21) that extends in a front-back direction by crossing over a center in a width direction of the absorbent article and is visible from a skin side of the absorbent article and a non-skin side mark part (25) which extends in the front-back direction by crossing over the center in the width direction of the absorbent article and is visible from a non-skin side of the absorbent article. The skin side mark part is arranged outside an absorbent core (51) in the front-back direction. An area of the non-skin side mark part is larger than that of the skin side mark part. The non-skin side mark part is lighter in a color than the skin side mark part.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to an absorbent article having a marking portion for positioning during wearing.

Background Art

[0002] Patent Documents 1 and 2 disclose absorbent articles having a marking portion for positioning during wearing. For example, Patent Document 1 discloses an absorbent article having a marking portion for positioning with respect to the body of a wearer. A wearing assistant can appropriately wear the absorbent article on the wearer by aligning the marking portion with an arbitrary portion of the body (for example, the spine of the wearer) during wearing. Further, Patent Document 2 discloses an absorbent article for positioning a pad to be worn on the absorbent article. A wearing assistant can grasp the wearing position of the pad by the marking portion and can appropriately wear the pad on the absorbent article.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional absorbent articles had the following problems. When the rear and front waist areas of an absorbent article are in contact with the body, the person assisting with application visually inspects the absorbent article from the non-skin side. In the absorbent articles described in Patent Documents 1 and 2, the person assisting with application could not visually inspect the markings and therefore could not confirm whether the article was applied in the correct position based on the markings. Failure to apply the absorbent article in the correct position could lead to leakage of bodily fluids or discomfort. Furthermore, if the pad is not applied in the correct position, the pad may not be able to properly absorb bodily fluids, requiring the absorbent article itself to be replaced, thus not saving absorbent material.

[0005] The present invention has been made in view of the above-mentioned problems, and aims to provide an absorbent article that allows an assistant to properly attach the absorbent article to the wearer and to confirm after attachment whether it has been attached in the correct position. [Means for solving the problem]

[0006] An absorbent article according to one embodiment has a front-to-back direction and a width direction perpendicular to the front-to-back direction, and a marking portion for positioning when worn. The marking portion has a skin-side marking portion that extends in the front-to-back direction across the center of the width direction of the absorbent article and is visible from the skin side of the absorbent article, and a non-skin-side marking portion that extends in the front-to-back direction across the center of the width direction of the absorbent article and is visible from the non-skin side of the absorbent article. The skin-side marking portion is positioned outside the absorbent core in the front-to-back direction. The area of ​​the non-skin-side marking portion is larger than the area of ​​the skin-side marking portion. The color of the non-skin-side marking portion is lighter than the color of the skin-side marking portion. [Brief explanation of the drawing]

[0007] [Figure 1] This is a plan view of the first absorbent article as seen from the skin side. [Figure 2] This is a plan view of the first absorbent article according to the embodiment, as seen from the non-skin side. [Figure 3] This is a cross-sectional view of line AA shown in Figure 1. [Figure 4] Figure 1 shows a cross-sectional view of the BB line. [Figure 5] This is a plan view of the second absorbent article as seen from the skin side. [Figure 6] This is a plan view of the second absorbent article, seen from the non-skin side. [Figure 7] This is a plan view from the skin side, showing the first absorbent article with the second absorbent article attached. [Figure 8] This is a diagram illustrating the process of attaching the first absorbent article. [Figure 9] This is a diagram illustrating the process of attaching the first absorbent article and the second absorbent article. [Figure 10] This is a diagram illustrating a group of absorbent materials. [Modes for carrying out the invention]

[0008] (1) Outline of the Embodiment The following matters become clear from this specification and the accompanying drawings: The absorbent article according to Embodiment 1 has a front-to-back direction and a width direction perpendicular to the front-to-back direction, and a marking portion for positioning during application. The marking portion has a skin-side marking portion that extends in the front-to-back direction across the center of the width direction of the absorbent article and is visible from the skin side of the absorbent article, and a non-skin-side marking portion that extends in the front-to-back direction across the center of the width direction of the absorbent article and is visible from the non-skin side of the absorbent article. The skin-side marking portion is positioned outside the absorbent core in the front-to-back direction. The area of ​​the non-skin-side marking portion is larger than the area of ​​the skin-side marking portion. The color of the non-skin-side marking portion is lighter than the color of the skin-side marking portion. Absorbent articles are generally folded with the skin side inward before use, so that the non-skin side of the absorbent article faces outward. At this time, an assistant who assists with application can notice the presence of the larger non-skin-side marking portion and recognize the presence of the marking portion for positioning. Furthermore, when placing the body on the absorbent material during application, the application assistant can notice the presence of the dark-colored skin-side marker and align the body's center with the width-direction center of the absorbent material based on the skin-side marker. At this time, because the skin-side marker is positioned outside the absorbent core in the anterior-posterior direction, positioning can be performed relative to the spine, navel, and other areas around the waist. In addition, when the rear and front waist areas of the absorbent material are in contact with the body, the application assistant can visually inspect the absorbent material from the non-skin side. At this time, the application assistant can confirm whether it has been applied in the correct position based on the non-skin-side marker.

[0009] In a preferred embodiment, the invention according to Embodiment 2 may have the following features in the invention according to Embodiment 1. The marker portion is arranged on both sides in the width direction relative to the skin-side marker portion and has side marker portions that are visible from the skin side of the absorbent article. The color of the side marker portion is different from the color of the skin-side marker portion. The skin-side marker portion that straddles the center in the width direction of the absorbent article may be covered and difficult to see when a wearer is placed on the absorbent article or when a pad is placed on the absorbent article. In this case, the side marker portion can be used to align the marker portion. Because the side marker portion and the skin-side marker portion are different in color, an assistant can recognize them as separate marker portions.

[0010] In a preferred embodiment, the invention according to Embodiment 3 may have the following features in the invention according to Embodiment 1 or Embodiment 2: It has a liquid-impermeable back sheet disposed on the non-skin side of the absorbent core. The skin-side marker portion and the non-skin-side marker portion are composed of the same colored portion attached to the skin-side surface of the back sheet. According to this embodiment, when the person assisting with application views the skin-side marker portion, they can view the colored portion without going through the back sheet and recognize the skin-side marker portion more clearly. On the other hand, when the person assisting with application views the non-skin-side marker portion, they can view the colored portion through the back sheet and recognize the non-skin-side marker portion more clearly. Furthermore, since the skin-side marker portion and the non-skin-side marker portion are composed of the same colored portion, compared to an embodiment in which they are composed of separate colored portions, there is no misalignment between the skin-side marker portion and the non-skin-side marker portion, and the product can be applied to the appropriate position regardless of whether it is positioned by the skin-side marker portion or the non-skin-side marker portion.

[0011] In a preferred embodiment, the invention according to Embodiment 4 may have the following features in the invention according to Embodiment 3: The absorbent core has a low-basis-weight portion where the basis weight of the absorbent material is lower than that of the surrounding area. The colored portion overlaps the low-basis-weight portion. According to this embodiment, the colored portion can be seen from the skin side of the absorbent article in the area overlapping the low-basis-weight portion. By seeing the colored portion through the low-basis-weight portion, the installer can grasp the position of the center of the product even in the area where the absorbent core is placed, and install it in a more appropriate position.

[0012] In a preferred embodiment, the invention according to Embodiment 5 may have the following features in the invention according to Embodiment 4: The length in the width direction of the colored portion is longer than the length in the width direction of the low-basis-weight portion that overlaps with the colored portion. According to this embodiment, when the absorbent article is viewed from the non-skin side, the area of ​​the non-skin side marker portion made up of the colored portion is large, and when the absorbent article is viewed from the skin side, the area of ​​the skin side marker portion made up of the colored portion is small. Because the length in the width direction of the colored portion is relatively long, even if there is a misalignment between the absorbent core provided with the low-basis-weight portion and the backsheet provided with the colored portion, it is easy to arrange the colored portion and the low-basis-weight portion on top of each other.

[0013] According to a preferred embodiment, the invention according to aspect 6 may have the following features in the invention according to aspect 4 or aspect 5. The low basis weight portion is a slit formed in the absorption core. The core wrap covering the skin side of the absorption core and the core wrap covering the non-skin side of the absorption core are joined at the slit. According to this embodiment, since the core wraps are joined to each other, the visibility of the skin side mark portion formed of the colored portion can be further improved.

[0014] According to a preferred embodiment, the invention according to aspect 7 may have the following features in the invention according to any one of aspects 1 to 6. The wavelength of the visible light of the skin side mark portion and the wavelength of the visible light of the non-skin side mark portion are 565 nm or more and 740 nm or less. The color with a visible light wavelength of 565 nm or more and 740 nm or less is a color included in numbers 1 to 9 among the 24 color samples classified by the Ostwald color phase ring, and is a color belonging to yellow, orange, and red. When replacing or wearing the absorbent article, it may be performed not only in a bright place but also in a dark place. According to this color, even in a relatively dark place, it is easy for the person assisting with wearing to recognize the skin side mark portion and the non-skin side mark portion.

[0015] According to a preferred embodiment, the invention according to aspect 8 may have the following features in the invention according to any one of aspects 1 to 7. The absorbent article includes an undercrotch region disposed at the center of the absorbent article in the front-back direction and disposed under the wearer's crotch, a rear body surrounding region disposed behind the undercrotch region, a front body surrounding region disposed in front of the undercrotch region, and a fastening tape extending outward in the width direction in the rear body surrounding region and fastening to a target region provided on the non-skin surface of the front body surrounding region. The skin side mark portion and the non-skin side mark portion are respectively provided in the front body surrounding region and the rear body surrounding region. According to this embodiment, when spreading the fastening tape and placing the wearer or the pad on the absorbent article, alignment can be achieved by the skin side mark portion in the rear body surrounding region. Also, when the front body surrounding region is applied to the ventral side of the wearer, alignment can be achieved by the non-skin side mark portion, and it can be confirmed whether it is properly positioned after wearing.

[0016] According to a preferred embodiment, the invention according to Embodiment 9 may have the following features in the invention according to any one of Embodiments 1 to 8. The target area straddles the center in the width direction of the absorbent article and has a target central portion that is darker in color than the surroundings. The length in the width direction of the non-skin-side mark portion is shorter than the length in the width direction of the target central portion. According to this embodiment, the person assisting with donning can distinguish and recognize the target central portion and the non-skin-side mark portion based on the difference in the length in the width direction between the target central portion and the non-skin-side mark portion, and can align the position of the center in the width direction of the absorbent article based on both of them.

[0017] According to a preferred embodiment, the invention according to Embodiment 10 may have the following features in the invention according to any one of Embodiments 1 to 9. The outer portion in the width direction of the absorbent article is folded inward in the width direction before use. The skin-side mark portion is covered by at least one of both side portions in the width direction of the absorbent article in a state of being folded inward in the width direction. According to this embodiment, in the process of unfolding the absorbent article during the donning operation, the skin-side mark portion that could not be visually recognized becomes visually recognizable, and it becomes easier for the person assisting with donning to notice the presence of the skin-side mark portion due to this change.

[0018] According to a preferred embodiment, the invention according to Embodiment 11 may have the following features in the invention according to Embodiment 10. The skin-side mark portion is covered by both outer portions in the width direction of the absorbent article in a state of being folded inward in the width direction. According to this embodiment, in the process of unfolding the outer portion of the absorbent article during the donning operation, it gradually changes to a state of being covered by both outer portions, a state of being covered by one outer portion, and a state of not being covered by any outer portion, and it becomes easier for the person assisting with donning to notice the presence of the skin-side mark portion due to this change.

[0019] In a preferred embodiment, the invention according to embodiment 12 may have the following features in the invention according to embodiment 10 or embodiment 11. The absorbent article has a first folded portion that is folded inward in the width direction with respect to a first fold located outside the width direction of the absorbent core when the absorbent article is folded inward in the width direction, and a second folded portion that is folded outward in the width direction and toward the skin with respect to a second fold located at the inner edge of the first folded portion in the width direction. An area of ​​50% or more of the total area of ​​the skin-side marker portion is covered when folded with respect to the first and second folds. The structure folded with respect to the first and second folds is a so-called Z-fold structure, and the outer part of the absorbent article in the width direction is laminated in multiple layers. Therefore, the visibility of the skin-side marker portion is reduced when the absorbent article is not unfolded, and improves when unfolded. Furthermore, because more than 50% of the skin-side marker area is covered, the rate of change in that area is high. Applicants can easily notice the presence of the skin-side marker area due to this change.

[0020] In a preferred embodiment, the invention according to embodiment 13 may have the following features in the invention according to any of embodiments 10 to 12: The skin-side marker portion in the front waist area and the skin-side marker portion in the rear waist area are each covered by the outer portion of the absorbent article in the width direction. The number of sheets covering the skin-side marker portion in the rear waist area is greater than the number of sheets covering the skin-side marker portion in the front waist area. According to this embodiment, the change in the skin-side marker portion during the process of deploying the absorbent article during application differs between the front and rear waist areas. Based on the change in the visibility of the skin-side marker portion, it is easier to distinguish and recognize the front and rear waist areas. The person assisting with application can more easily recognize the front and back of the absorbent article.

[0021] In a preferred embodiment, the invention according to Embodiment 14 is a group of absorbent articles comprising a plurality of absorbent articles described in any of Embodiments 1 to 13. The group of absorbent articles comprises a first absorbent article and a second absorbent article having different performance from the first absorbent article. The color difference ΔE between the color of the non-skin side marker portion of the first absorbent article and the color of the non-skin side marker portion of the second absorbent article is 3.0 or less. The color difference ΔE between the color of the skin side marker portion of the first absorbent article and the color of the skin side marker portion of the second absorbent article is 3.0 or less. According to this embodiment, even absorbent articles with different performance (for example, absorbent articles with different absorption capacities, absorbent articles with different sizes, etc.) have skin side marker portions and non-skin side marker portions of substantially the same color. When an assistant assists in applying absorbent articles with different performance, they can recognize that the marker portions have similar roles and can perform positioning with the same sense using the skin side marker portion and non-skin side marker portion.

[0022] In a preferred embodiment, the invention according to embodiment 15 may have the following features in the invention according to embodiment 14. The first absorbent article and the second absorbent article each have a crotch area positioned in the center of the absorbent article in the front-to-back direction and positioned between the legs of the wearer, a rear waist area positioned behind the crotch area, a front waist area positioned in front of the crotch area, and a fastening tape extending outward in the width direction in the rear waist area and fastening to a target area provided on the non-skin surface of the front waist area. The color of the target area of ​​the first absorbent article and the color of the target area of ​​the second absorbent article are different. According to this embodiment, the person assisting with fitting can grasp the difference in performance between the first absorbent article and the second absorbent article by the difference in the color of the target area, and can position them with the same sense using markings of substantially the same color.

[0023] (2) Overall outline of absorbent article The absorbent article according to the embodiment will be described below with reference to the drawings. In the following drawings, identical or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratios of each dimension may differ from those of reality. Therefore, specific dimensions should be determined by referring to the following description. In addition, there may be parts where the relationships and ratios of dimensions differ between drawings. The absorbent article according to this embodiment is preferably of a type that is put on by an assistant, such as a caregiver, by a wearer, such as a person requiring care. In particular, the absorbent article according to this embodiment is preferably a disposable adult diaper. In the embodiment, a tape-type disposable diaper will be described as the first embodiment and an absorbent pad as the second embodiment, but the absorbent article according to the present invention may also be a pant-type absorbent article. The first absorbent article 11 is a tape-type disposable diaper. The first absorbent article 11 may be used alone, or may be used together with the second absorbent article (absorbent pad) 12, or may be used together with other absorbent pads. The second absorbent article 12 is an absorbent pad used by being attached to the inside of a wearable item such as a disposable diaper. The second absorbent article 12 may be used together with the first absorbent article 11, or together with other wearable items. In the following description, the description of absorbent article 10 refers to both the first absorbent article 11 and the second absorbent article 12.

[0024] Figure 1 is a plan view of the first absorbent article 11 as seen from the skin side T1, and Figure 2 is a plan view of the first absorbent article 11 as seen from the non-skin side T2. Figure 3 is a cross-sectional view along line AA shown in Figure 1. Figure 4 is a cross-sectional view along line BB shown in Figure 1. Figure 5 is a plan view of the second absorbent article 12 as seen from the skin side T1, and Figure 6 is a plan view of the second absorbent article 12 as seen from the non-skin side T2. 7 This is a plan view from the skin side T1, showing the second absorbent article 12 attached to the skin surface of the first absorbent article 11. Figures 1, 2, and 5 to 7 show the absorbent article 10 in a state where the wrinkles in the sheet constituting the absorbent article 10 have disappeared.

[0025] The absorbent article 10 has a front-to-back direction L extending to the front and back of the wearer's body, a width direction W perpendicular to the front-to-back direction L, and a thickness direction T perpendicular to the front-to-back direction L and the width direction W. The thickness direction T extends to the skin side T1 and the non-skin side T2. The skin side T1 corresponds to the side that faces the wearer's skin during use. The non-skin side T2 corresponds to the side that is turned away from the wearer's skin during use. At least the first absorbent article 11 of the absorbent article 10 has a front waist area S1, a rear waist area S2, and a crotch area S3. The second absorbent article 12 has at least a crotch area S3. The front waist area S1 faces the front of the wearer's body during use. The rear waist area S2 faces the back of the wearer's body during use. The crotch area S3 is located between the front waist area S1 and the rear waist area S2 and is positioned between the wearer's legs during use. In the first absorbent article 11, the crotch area S3 is the area where the leg opening 65 is provided, the boundary between the front waist area S1 and the crotch area S3 is defined by the front edge of the leg opening 65, and the boundary between the rear waist area S2 and the crotch area S3 may be defined by the rear edge of the leg opening 65.

[0026] The absorbent article 10 has an absorbent body 50 located at least in the crotch area S3. The absorbent body 50 may extend from the crotch area S3 to the front waist area S1 and the rear waist area S2. The absorbent body 50 has an absorbent core 51. The absorbent core 51 may be a laminate of absorbent materials including, for example, crushed pulp or a superabsorbent polymer (SAP), or a mixture thereof. The absorbent core 51 may be covered by a core wrap 52. The core wrap 52 is arranged to cover the absorbent core 51 and may be, for example, tissue or a nonwoven fabric sheet. The absorbent core 51 may have a low basis weight section 55 where the basis weight of the absorbent material is lower than that of the surrounding area. The low basis weight section 55 may have absorbent material with a lower basis weight than that of the surrounding area, or it may be a slit where no absorbent material is placed. In this embodiment, the low basis weight section 55 is composed of a slit. The low basis weight section 55 may include a central low basis weight section 551 located in the center in the width direction of the absorption core, and a side low basis weight section 552 spaced apart in the width direction from the central low basis weight section 551 and located on the side of the absorption core 51.

[0027] The absorbent article 10 has a top sheet 41 located on the skin side T1 of the absorbent core 51 and in contact with the wearer's skin. The top sheet 41 constitutes the skin-facing (inner surface) of the absorbent article 10 and may have a center sheet 41a and side sheets 41b. The center sheet 41a is permeable to liquids and may be positioned to cover at least the center in the width direction W of the absorbent core 51. The side sheets 41b are made of a hydrophobic nonwoven fabric and may be positioned outside the center in the width direction W of the absorbent core 51 and to cover both sides of the center sheet 41a in the width direction W. The side sheets 41b may, together with the leak-proof stretchable member 61 described later, constitute an upright leak-proof gather. The absorbent article 10 has a back sheet 42 located on the non-skin side T2 of the absorbent body 50 and is impermeable to liquids. The back sheet 42 may be positioned to cover the entire surface of the absorbent core 51. The absorbent article 10 may have an outer sheet 43 located on the non-skin side T2 of the back sheet 42. The outer sheet 43 may constitute the non-skin side (outer surface) of the absorbent article 10. The back sheet 42 may be made of film, and the top sheet 41 and outer sheet 43 may be made of nonwoven fabric.

[0028] The first absorbent article 11 may have a leak-proof stretchable member 61 that constitutes a leak-proof gather 60, and a leg-around stretchable member 68 that is positioned in the leg-around opening 65. The leak-proof stretchable member 61 and the leg-around stretchable member 68 are made of a stretchable material such as elastic thread. The leak-proof stretchable member 61 is positioned on the inside of the side sheet 41b and stands upright on the inner edge of the side sheet 41b towards the wearer. The leg-around stretchable member 68 is positioned along the leg-around opening 65 and fits the leg-around opening 65 to the wearer's legs. The first absorbent article 11 may have a fastening tape 94 that extends outward in the width direction in the rear waist area S2 and fastens to a target area 95 provided on the non-skin surface of the front waist area S1. The fastening tape 94 may be positioned in flap portions 90 provided on both sides in the width direction W of the rear waist area S2. The fastening tape 94 may have an engaging portion 96 that engages with the target area 95.

[0029] As shown in Figures 5 and 6, the second absorbent article 12 may be substantially rectangular in plan view. The second absorbent article 12 may consist of an absorbent body 50, a center sheet 41a, and a back sheet 42, and may not have side sheets 41b, an outer sheet 43, leg openings, leak-proof gathers, and fastening tape. The second absorbent article 12 is used when placed on the skin side T1 of a wearable article such as the first absorbent article 11. By replacing only the second absorbent article 12, the wearable article can be used continuously, reducing the frequency of changing the wearable article.

[0030] The absorbent article 10 has a marking portion 20 for positioning when worn. The marking portion 20 has a skin-side marking portion 21 visible from the skin-side T1 of the absorbent article 10, and a non-skin-side marking portion 25 visible from the non-skin-side T2 of the absorbent article 10. In this embodiment, a visible marking portion 20 is a marking portion that can be recognized by visual inspection. Specifically, for example, a marking portion 20 with a color difference ΔE of 8 or more relative to its surroundings is a visible marking portion. Alternatively, for example, a marking portion that is visible to a subject with good visual acuity (1.0 or better) in both eyes at a distance of approximately 30 to 50 cm in a brightly lit room (approximate color temperature: 4600 to 5400 K (Kelvin)) (approximate: 500 to 750 lx (lux)) is a visible marking portion. Furthermore, the color difference ΔE can be determined by measuring the color of two points (two regions) to be measured using a commercially available colorimeter and comparing the numerical values ​​obtained based on the CIE1976 (L*a*b*) color space specified in JIS Z 8729. Specifically, when the difference in L* values ​​between the two points to be measured is ΔL*, the difference in a* is Δa*, and the difference in b* values ​​is Δb*, the color difference ΔE = [(ΔL*) 2 +(Δa*) 2 +(Δb*) 2 ] 1 / 2 It is determined by [method].

[0031] The absorbent article 10 can prompt an assistant to perform the application at the appropriate time through both the skin-side marker portion 21 and the non-skin-side marker portion 25. For example, in a configuration where the marker portion is provided only on either the skin-side T1 or the non-skin-side T2 of the absorbent article, it is not possible to prompt an assistant to perform the application if they are only viewing the side without the marker portion. Furthermore, the assistant would need to repeatedly flip over the absorbent article 10 to check the marker portion in order to confirm the application. However, by providing both the skin-side marker portion 21 and the non-skin-side marker portion 25, operability can be improved. The marker portion 20 can be made using an oil-based ink applicable to printing on the absorbent article 10, and can contain commonly used dyes, pigments, organic solvents, oil-based solvents, surfactants, etc. Various known printing methods can be used without particular limitations as the printing method. The marker portion 20 may also be a colored hot-melt adhesive or a colored material (e.g., elastic thread, sheet).

[0032] The skin-side marker portion 21 may have a first skin-side marker portion 211 located on the first absorbent article 11 and a second skin-side marker portion 212 located on the second absorbent article 12. The non-skin-side marker portion 25 may have a first non-skin-side marker portion 251 located on the first absorbent article 11 and a second non-skin-side marker portion 252 located on the second absorbent article 12. The skin-side marker portion 21 and the non-skin-side marker portion 25 may extend in the front-to-back direction L, straddling the center of the width direction of the absorbent article 10 (hereinafter referred to as the article width center) 10CW. The skin-side marker portion 21 and the non-skin-side marker portion 25 only need to have at least a part of them straddling the article width center 10CW, and may have portions that do not straddle the article width center 10CW. Furthermore, the skin-side marker portion 21 and the non-skin-side marker portion 25 only need to have a portion that extends in the front-to-back direction L, and may have a portion that does not extend in the front-to-back direction L. Here, the configuration extending in the front-to-back direction L includes not only a configuration parallel to the front-to-back direction L, but also a configuration that is inclined at 30 degrees or less with respect to the front-to-back direction L. Similarly, the configuration extending in the width direction W includes not only a configuration parallel to the width direction W, but also a configuration that is inclined at 30 degrees or less with respect to the width direction W. In this embodiment, the skin-side marker portion 21 and the non-skin-side marker portion 25 are linear in shape and extend parallel to the front-to-back direction L.

[0033] The skin-side marker portion 21 is positioned outside the absorption core 51 in the front-rear direction L. Similarly, the non-skin-side marker portion 25 may be positioned outside the absorption core 51 in the front-rear direction L. The skin-side marker portion 21 and the non-skin-side marker portion 25 may extend continuously from the region overlapping with the absorption core 51 to the region outside the absorption core 51 in the front-rear direction L, or they may be positioned independently of the region overlapping with the absorption core 51 and the region outside the absorption core 51 in the front-rear direction L, or they may be positioned only in the region outside the absorption core 51 in the front-rear direction L. The skin-side marker portion 21 and the non-skin-side marker portion 25 may be provided in the front waist region S1 and the rear waist region S2, respectively, and may be provided in the region in front of the absorption core 51 in the front waist region S1 and in the region behind the absorption core 51 in the rear waist region S2. With this configuration, when spreading out the fastening tape 94 and placing the wearer or absorbent pad on the absorbent article 10, the position can be aligned using the skin-side marker portion 21 of the rear waist area S2. Also, when the front waist area S1 is placed against the wearer's abdominal side, the position can be aligned using the non-skin-side marker portion 25 of the front waist area S1.

[0034] The color of the non-skin-side marker area 25 is lighter than the color of the skin-side marker area 21. Here, the color intensity can be compared visually or by lightness (the lower the lightness, the darker the color). Also, in a form where the color intensity changes, the darkest color of the non-skin-side marker area 25 may be lighter than the darkest color of the skin-side marker area 21. Preferably, the darkest color of the non-skin-side marker area 25 may be lighter than the lightest color of the skin-side marker area 21. Furthermore, when worn, the front waist area S1 and the rear waist area S2, in particular the vicinity of the waist opening 66, are positioned relative to the body. Therefore, preferably, in the areas outside the absorption core 51 in the front-to-back direction L in the front waist area S1 and the rear waist area S2, the color of the non-skin-side marker area 25 may be lighter than the color of the skin-side marker area 21. The area of ​​the non-skin-side marker area 25 is larger than the area of ​​the skin-side marker area 21. The area is compared by the area of ​​the marker portion visible from the outside of the absorbent article 10. The area of ​​the non-skin side marker portion 25 visible from the non-skin side T2 of the absorbent article 10 is larger than the area of ​​the skin side marker portion 21 visible from the skin side T1 of the absorbent article 10.

[0035] Next, the alignment using the marker portion 20 in the attachment process will be explained. Figure 8 is a diagram illustrating the process of attaching only the first absorbent article 11. Figure 8(a) shows the first absorbent article 11 before the attachment operation, and is the first absorbent article 11 in the state after being removed from the package. The first absorbent article 11 is folded with the skin side T1 of the first absorbent article 11 facing inward, and the non-skin side T2 of the first absorbent article 11 facing outward. More specifically, the outer part of the first absorbent article (the outer end in the width direction W) is folded using the front-to-back fold FL extending in the front-to-back direction L as a base point, and then folded using the width fold FW extending in the width direction W located in the crotch area S3 as a base point. In this state, the first non-skin side marker portion 251, which has a relatively large area, is conspicuous, and the attachment assistant can notice the presence of the first non-skin side marker portion 251 and grasp the presence of the marker portion 20 for alignment. Figure 8(b) shows the state after unfolding from the state shown in Figure 8(a) with the width fold FW as the starting point, and the first absorbent article 11 is folded with the front and rear fold FL as the starting point. The first skin-side marker portion 211 is folded inward in the width direction W with the front and rear fold FL as the starting point, and may be covered by both outer portions in the width direction W of the first absorbent article 11. With this configuration, during the process of unfolding the outer portions of the first absorbent article 11 during the application operation, it gradually changes from being covered by both outer portions, to being covered by one outer portion, and to being not covered by either outer portion, making it easy for the application assistant to notice the presence of the first skin-side marker portion 211 by this change. Alternatively, the first skin-side marker portion 211 is folded inward in the width direction W with the front and rear fold FL as the starting point, and only needs to be covered by at least one of the two outer portions in the width direction W of the first absorbent article 11, and does not need to be covered by both outer portions. With this configuration, the first skin-side marker portion 211, which was not visible during the process of unfolding the first absorbent article 11 during the application procedure, becomes visible in stages, making it easier for the application assistant to notice the presence of the first skin-side marker portion 211 due to the change. In the configuration in which the skin-side marker portion is covered by the outer part of the absorbent article, it is preferable that the entire skin-side marker portion 21 is covered, but it is sufficient if only a part of the skin-side marker portion 21 is covered. Alternatively, in other modifications, the first skin-side marker portion 211 does not need to be covered when folded with the front and rear fold lines FL as the base point.

[0036] Figure 8(c) shows the unfolded state, which is unfolded from the state shown in Figure 8(b) using the front and rear fold line FL as the starting point, and is the state before the wearer's back is placed on the rear torso area. Even if the assisting person does not notice the presence of the first skin-side marker portion 211 in the state shown in Figure 8(b) because the first skin-side marker portion 211 is covered, the assisting person can easily notice the presence of the first skin-side marker portion 211 when placing the body on the first absorbent article 11. Therefore, the assisting person can align the center of the body with the center of the article width 10CW of the first absorbent article 11 based on the first skin-side marker portion 211. At this time, since the first skin-side marker portion 211 is positioned outside the front-to-back direction L of the absorbent core 51, positioning can be performed relative to the spine, navel, and other areas near the waist. If the position or angle of one end of the first absorbent article 11 in the front-to-back direction (for example, near the waist in the rear torso area) is misaligned, the angle of the other end of the first absorbent article 11 in the front-to-back direction L (for example, in the front torso area) will be misaligned even more, and the position in the width direction will be misaligned over the entire front-to-back area of ​​the absorbent article. By using the first skin-side marker portion 211 to determine the initial position relative to the waist area, the first absorbent article 11 can be properly fitted over the entire front-to-back area L of the first absorbent article 11.

[0037] Figure 8(d) shows the state in which the wearer's back is placed on the rear waist area S2 and the front waist area S1 is placed against the wearer's abdomen. With the rear waist area S2 and front waist area S1 of the first absorbent article 11 in contact with the body, the person assisting with the application can visually inspect the first absorbent article 11 from the non-skin side T2. At this time, the person assisting with the application can confirm whether the first absorbent article 11 has been applied to the correct position based on the first non-skin side marker portion 251. In the case of a tape-type absorbent article, the fastening tape 94 of the rear waist area S2 is fastened to the target area 95 of the front waist area S1. In this configuration, where the first non-skin side marker portion 251 is positioned in the front waist area S1, the first non-skin side marker portion 251 is light in color and not too conspicuous. Therefore, when an assistant fastens the fastening tape 94 to the target area 95, they can perform the fastening operation while focusing on the target area 95 without being distracted by the first non-skin side marker portion 251.

[0038] The front and rear folds FL of the first absorbent article 11 may have a first fold FL1 and a second fold FL2. The first fold FL1 is located outside the width direction W of the absorbent core 51 and is a fold for folding inward in the width direction W. The second fold FL2 is located inside the width direction W of the first fold FL1 and is a fold for folding outward in the width direction W. The second fold FL2 may be located inside the width direction of the outer edge of the absorbent core 51 when folded with the first fold FL1 as the base point. The outer part of the first absorbent article 11 has a first folded portion FLR1 which is folded by the first fold FL1 and located between the first fold FL1 and the second fold FL2, and a second folded portion FLR2 which is folded by the second fold FL2. The second fold FL2 is located on the inner edge of the first folded portion FLR1 when folded with the first fold FL1 and the second fold FL2 as the base points. The second folded portion FLR2 may be located on the skin side T1 of the first folded portion FLR1. More than 50% of the total area of ​​the first skin-side marker portion 211 may be covered by at least one of the first folded portion FLR1 and the second folded portion FLR2 when folded with the first fold FL1 and the second fold FL2 as the base points. The structure folded with the first fold FL1 and the second fold FL2 as the base points is a so-called Z-fold structure and is laminated in multiple layers. Therefore, the visibility of the first skin-side marker portion 211 is reduced when the first absorbent article 11 is not unfolded, and the visibility of the first skin-side marker portion 211 is improved when it is unfolded. Furthermore, since more than 50% of the area of ​​the first skin-side marker portion 211 is covered, the rate of change in area is high. The person assisting with application can easily notice the presence of the first skin-side marker portion due to this change. Note that the outer part of the absorbent article 10 may not be folded by both the first fold FL1 and the second fold FL2, but may be folded using only the first fold FL1 as the starting point. In the state where it is folded by only the first fold FL1, at least a part of the first skin-side marker portion 211 may be covered.

[0039] The first skin-side marker portion 211 in the front waist area S1 and the first skin-side marker portion 211 in the rear waist area S2 may be covered by the outer portion in the width direction W of the first absorbent article 11 when folded with the front and rear fold line FL as the base point. The number of sheets covering the area of ​​the first skin-side marker portion 211 in the rear waist area S2 may be greater than the number of sheets covering the area of ​​the first skin-side marker portion 211 in the front waist area S1. With this configuration, the change in visibility of the first skin-side marker portion 211 during the process of unfolding the first absorbent article 11 during the application operation differs between the front waist area S1 and the rear waist area S2. Based on the change in visibility of the first skin-side marker portion 211, the application assistant can distinguish and recognize the front waist area S1 and the rear waist area S2, and apply the absorbent article without mistakenly putting it on the wrong way around. More specifically, the first skin-side marker portion 211 of the rear waist area S2 may be covered not only by the top sheet and back sheet but also by the flap portion 90, while the first skin-side marker portion 211 of the front waist area S1 may be covered by the top sheet and back sheet. In a modified example, one of the first skin-side marker portion 211 of the front waist area S1 and the first skin-side marker portion 211 of the rear waist area S2 may be covered by the outer portion in the width direction W of the absorbent article 11, while the other of the first skin-side marker portion 211 of the front waist area S1 and the first skin-side marker portion 211 of the rear waist area S2 may not be covered by the outer portion in the width direction W of the absorbent article 11. Alternatively, the area of ​​the first skin-side marker portion 211 in the front waist area S1 that is not covered by the outer part of the absorbent article 11 in the width direction W (exposed area) may be different from the area of ​​the first skin-side marker portion 211 in the rear waist area S2 that is not covered by the outer part of the absorbent article 11 in the width direction W. With these modified configurations as well, the visibility of the first skin-side marker portion 211 will differ between the front waist area S1 and the rear waist area S2. Based on the visibility of the first skin-side marker portion 211, the person assisting with application can distinguish and recognize the front waist area S1 and the rear waist area S2, and apply the absorbent article without mistakenly putting it on the wrong way around.

[0040] As shown in Figure 2, the target area 95 may have a target central portion 951 that straddles the center 10CW of the article width and is darker in color than the surrounding area. The fitting assistant can also align the center of the front waist area S1 in the width direction W with respect to the body using the target central portion 951. The length in the width direction W of the first non-skin side marker portion 251 may be shorter than the length in the width direction W of the target central portion 951. With this configuration, the fitting assistant can distinguish and recognize the target central portion 951 and the first non-skin side marker portion 251 by the difference in the length in the width direction W of the target central portion 951 and the first non-skin side marker portion 251, and can align the center of the front waist area S1 in the width direction W using both the target central portion 951 and the first non-skin side marker portion 251. The target central portion 951 may be a band extending in the front-to-back direction L, and may be located only in the center of the target area 95 and not on the outer part of the target area 95. Furthermore, the central target portion 951 may be provided continuously over the entire front-to-back direction L of the target area 95. Preferably, the first non-skin side marker portion 251 and the central target portion 951 may be configured to be easily distinguishable. Specifically, the color of the first non-skin side marker portion 251 and the color of the central target portion 951 may be different, and the length in the width direction W of the first non-skin side marker portion 251 may be 1 / 2 or less of the length in the width direction W of the central target portion 951.

[0041] Next, the fitting process when using disposable diapers and absorbent pads together will be explained. Figure 9 is a diagram illustrating the process of fitting the first absorbent item 11 and the second absorbent item 12 to the wearer with the second absorbent item 12 placed on top of the first absorbent item 11. Figure 9(a) shows the second absorbent item 12 before the fitting operation, and is the second absorbent item 12 as it has been removed from its package. The second absorbent item 12 is folded with the skin side T1 facing inward, and the non-skin side T2 facing outward. More specifically, the second absorbent item 12 is folded using a width fold FW that extends in the width direction W located in the crotch area S3 as the starting point. In this state, the second non-skin side marker portion 252, which has a relatively large area, is noticeable, and the person assisting with fitting can notice the presence of the second non-skin side marker portion 252 and grasp the presence of the marker portion 20 for alignment. Figure 9(b) shows the state in which the second absorbent article 12 is placed on the first absorbent article 11. In the configuration that has a first skin-side marker portion 211 and does not have a second skin-side marker portion 212 (where an absorbent pad other than the second absorbent article 12 is placed on the first absorbent article 11), the person assisting with application can align the absorbent pad based on the first skin-side marker portion 211. Furthermore, in a configuration having a second skin-side marker portion 212 and not having a first skin-side marker portion 211 (where the second absorbent article 12 is placed on an item of clothing other than the first absorbent article 11), the person assisting with application can align the absorbent pad with the item of clothing based on the second skin-side marker portion 212. Also, in a configuration having both a first skin-side marker portion 211 and a second skin-side marker portion 212 (where the second absorbent article 12 is placed on the first absorbent article 11), the person assisting with application can align both using both the first skin-side marker portion 211 and the second skin-side marker portion 212.

[0042] Figure 9(c) shows the state after the wearer's back has been placed on the first absorbent article 11 and the second absorbent article 12, with only the second absorbent article 12 being placed against the wearer's abdomen. The assistant inspects the second absorbent article 12 from the non-skin side T2. At this time, the assistant can confirm whether the second absorbent article 12 has been placed in the correct position based on the second non-skin side marker 252. As shown in Figure 9(c), the first absorbent article 11 may be placed against the abdomen after aligning the second absorbent article 12 by placing only the second absorbent article 12 against the abdomen. However, for example, after placing the wearer's back on the first absorbent article 11 and the second absorbent article 12, the first absorbent article 11 and the second absorbent article may be placed against the wearer's abdomen together, rather than only placing the second absorbent article 12 against the wearer's abdomen. Figure 9(d) shows the first absorbent article 11 and the second absorbent article 12 in place on the abdomen. The person assisting with application can visually inspect the first absorbent article 11 from the non-skin side T2. At this time, the person assisting with application can confirm whether the first absorbent article 11 with the second absorbent article 12 on top has been properly positioned based on the first non-skin side marker portion 251 of the first absorbent article 11.

[0043] As shown in Figure 1, the marker portion 20 of the first absorbent article 11 is arranged on both sides in the width direction W relative to the first skin-side marker portion 211, and may have a side marker portion 27 that is visible from the skin side T1 of the first absorbent article 11. The color of the side marker portion 27 may be different from the color of the skin-side marker portion 21. Here, different colors mean that the color difference ΔE between the two colors is greater than 3.0. Alternatively, different colors mean that they are different colored labels in the 24 color charts classified by the Ostwald color circle. Because the two colors are different, it is easy for the person assisting with application to recognize them as different marker portions. In this embodiment, the side marker portion 27 is made of a leak-proof expandable member 61, and the leak-proof expandable member 61 itself is colored in a different color from the skin-side marker portion 21. In a modified example, the side marker portion 27 may be made of a colored portion that is colored by printing or the like on a sheet or the like that makes up the absorbent article. The first skin-side marker portion 211, which straddles the center 10CW of the width of the article, may be covered and difficult to see when a wearer is placed on the absorbent article 10 or when an absorbent pad is placed on the absorbent article 10. In this case, the side marker portion 27 can be used to align the absorbent article 10. Since the side marker portion 27 and the skin-side marker portion 21 are different colors, an assistant can recognize them as separate marker portions 20. It is preferable that the side marker portion 27 is provided in the rear waist area S2 in order to align it with the back. The side marker portion 27 may also extend in the front-to-back direction L in order to properly position the absorbent article 10 in the front-to-back direction L. The side marker portion 27 may also be positioned overlapping with the absorbent core 51 in order to align the absorbent core 51. It is preferable that the side marker portion 27 and the skin-side marker portion 21 be recognized separately, and that they are spaced apart in the width direction W and not touching each other. The distance between the side marker portion 27 and the skin-side marker portion 21 is preferably longer than the maximum width of each marker portion.

[0044] The skin-side marker portion 21 and the non-skin-side marker portion 25 may be composed of separate colored portions or of the same colored portion. In this embodiment, the skin-side marker portion 21 and the non-skin-side marker portion 25 are composed of the same colored portion 29. The colored portion 29 is attached to the skin-side T1 surface of the back sheet 42. Furthermore, since the skin-side marker portion 21 and the non-skin-side marker portion 25 are composed of the same colored portion 29, there is no misalignment between the skin-side marker portion 21 and the non-skin-side marker portion 25 compared to a configuration in which they are composed of separate colored portions, and the product can be attached to the appropriate position regardless of whether the positioning is performed using the skin-side marker portion 21 or the non-skin-side marker portion 25. The back sheet 42 and outer sheet 43 are arranged on the non-skin side T2 of the colored portion 29. In areas where the absorbent material 50 is not placed, the top sheet 41 and back sheet 42 are arranged on the skin-side T1 of the colored portion 29. In the region where the absorbent 50 is placed, the absorbent 50 and the top sheet 41 are placed on the skin side T1 from the colored portion 29. In the region where the absorbent 50 is not placed, the light transmittance of the back sheet 42 is lower than that of the top sheet 41 and the outer sheet 43, so the color of the non-skin side marker portion 25 is perceived as lighter, and the color of the skin side marker portion 21 is perceived as darker. In the region where the absorbent 50 is placed, the light transmittance of the absorbing core 51 is lower than that of the other components that make up the absorbent article, so the colored portion 29 cannot be seen from the skin side T1 of the absorbent article through the absorbing core, and the area of ​​the skin side marker portion 21 becomes smaller.

[0045] The wavelength of visible light for the skin-side marker portion 21 and the wavelength of visible light for the non-skin-side marker portion 25 may be between 565 Nm and 740 Nm. Colors with a visible light wavelength between 565 Nm and 740 Nm are colors included in numbers 1 through 9 of the 24 color charts classified by the Ostwald color circle, and belong to the yellow, orange, and red categories. When replacing or attaching the absorbent article 10, this may be done not only in bright places but also in dark places. With these colors, even in relatively dark places, the person assisting with attachment can easily recognize the skin-side marker portion 21 and the non-skin-side marker portion 25. Here, "dark place" refers to an environment with brightness from a small light bulb, specifically an environment with a brightness of 10 lux or less.

[0046] The color of the skin-side marker 21 and the color of the non-skin-side marker 25 may be the same. Here, "the same color" means that the color difference ΔE of the two colors is 3.0 or less. Alternatively, "the same color" means that they are the same color in the 24 color charts classified by the Ostwald color circle. With this configuration, the fitting assistant can recognize both the skin-side marker 21 and the non-skin-side marker 25 as markers used in the fitting process, and can easily perform positioning using the marker 20 continuously during the fitting process. In a modified example, the color of the skin-side marker 21 and the color of the non-skin-side marker 25 may be different. With this configuration, the fitting assistant can distinguish and recognize the skin-side marker 21 and the non-skin-side marker 25, and can easily perform positioning without confusing them. Furthermore, in this embodiment, the first skin-side marker portion 211 and the second skin-side marker portion 212 are the same color and shape (both are linear), but in modified examples, at least one of the same color and shape may be different. Also, in this embodiment, the width of the first skin-side marker portion 211 is different from the width of the second skin-side marker portion 212, but it may be the same as the width of the second skin-side marker portion 212. Similarly, the first non-skin-side marker portion 251 and the second non-skin-side marker portion 252 are the same color and shape (both are linear), but in modified examples, at least one of the same color and shape may be different. Also, in this embodiment, the width of the first non-skin-side marker portion 251 is different from the width of the second non-skin-side marker portion 252, but it may be the same as the width of the second skin-side marker portion 212.

[0047] The colored portion 29 constituting the first skin-side marker portion 211 may overlap the low-basis-weight portion 55 of the absorbent core 51. The colored portion 29 may be visible from the skin-side T1 of the first absorbent article 11 in the area where it overlaps with the low-basis-weight portion 55. The colored portion 29 visible through the low-basis-weight portion 55 constitutes the first skin-side marker portion 211. With this configuration, by visualizing the colored portion 29 through the low-basis-weight portion 55, the installer can grasp the position of the center of the product even in the area where the absorbent core 51 is located, and install it in a more appropriate position. In this embodiment, the colored portion 29 is positioned overlapping the central low-basis-weight portion 551 and not overlapping the side low-basis-weight portion 552. With this configuration, when an assistant installing the absorbent core 51 visually inspects it, the presence or absence of the first skin-side marker portion 211 makes it easier to grasp the positions of the central low-basis-weight portion 551 and the side low-basis-weight portions 552, allowing for proper alignment of the absorbent core 51. Furthermore, the first skin-side marker portions 211 are arranged continuously in the front-to-back direction L, while the central low-basis-weight portions 551 are arranged with gaps in the front-to-back direction L. Therefore, the first skin-side marker portions 211 visible through the central low-basis-weight portions 551 are arranged with gaps in the front-to-back direction L. As a result, the position and presence of each central low-basis-weight portion 551 become more conspicuous, making it easier for the assistant installing the absorbent core 51 to grasp the positions of the central low-basis-weight portion 551 and the side low-basis-weight portions 552, allowing for proper alignment of the absorbent core 51.

[0048] The length in the width direction W of the colored portion 29 may be longer than the length in the width direction W of the low-basis-weight portion 55 that overlaps with the colored portion 29. With this configuration, when the first absorbent article 11 is viewed from the non-skin side T2, the area of ​​the first non-skin side marker portion 251 made up of the colored portion 29 becomes larger, and when the first absorbent article 11 is viewed from the skin side T1, the area of ​​the first skin side marker portion 211 made up of the colored portion 29 becomes smaller. Also, because the length in the width direction W of the colored portion 29 is relatively long, even if there is a misalignment between the absorbent core 51 on which the low-basis-weight portion 55 is provided and the backsheet 42 on which the colored portion 29 is provided, it is easy to overlap the colored portion 29 and the low-basis-weight portion 55. Preferably, the outer edges of the colored portion 29 in the width direction W may be located on both sides of the outer edges of the central low-basis-weight portion 551. Also, the length in the front-to-back direction L of the colored portion 29 may be longer than the length in the front-to-back direction L of the central low-basis-weight portion 551. Preferably, the low basis weight portion 55 is a slit formed in the absorbent core 51, and the core wrap 52 covering the skin side T1 of the absorbent core 51 and the core wrap 52 covering the non-skin side T2 of the absorbent core 51 may be joined at the slit. With this configuration, the visibility of the first skin-side marker portion 211, which consists of the colored portion 29, can be further improved by joining the core wraps together.

[0049] Next, the absorbent article group 100 will be described in detail based on Figure 10. The absorbent article group 100 comprises multiple absorbent articles, and includes at least a first absorbent article 15 and a second absorbent article 16. The first absorbent article 11 and the second absorbent article 12 described above have different uses (disposable adult diapers and absorbent pads). However, the first absorbent article 15 and the second absorbent article 16 constituting the absorbent article group 100 may be absorbent articles for the same use (for example, both are disposable adult diapers). The first absorbent article 15 and the second absorbent article 16 have the same use but different performance. Specifically, differences in performance can be exemplified by differences in size and absorption capacity. The first absorbent article 15 and the second absorbent article 16 may have the features of the first absorbent article 11 or the second absorbent article 12 described above, and have at least a skin-side marker portion 21 and a non-skin-side marker portion 25. The color difference ΔE between the color of the non-skin side marker portion 255 of the first absorbent article 15 and the color of the non-skin side marker portion 256 of the second absorbent article 16 is 3.0 or less. Furthermore, the color difference ΔE between the color of the first skin side marker portion 215 of the first absorbent article 15 and the color of the second skin side marker portion 216 of the second absorbent article is also 3.0 or less. Even absorbent articles with different performance characteristics (e.g., absorbent articles with different absorption capacities, absorbent articles with different sizes) have substantially the same color skin side and non-skin side marker portions. When applying absorbent articles with different performance characteristics, the application assistant can recognize that the marker portions serve the same purpose and can align them with the same sense of touch using the skin side and non-skin side marker portions.

[0050] The color of the target area 95 of the first absorbent article 15 and the color of the target area 95 of the second absorbent article 16 may be different. The colors of the target area 95 of the first absorbent article 15 and the color of the target area 95 of the second absorbent article 16 may be partially different or partially overlapping. With this configuration, the person assisting with installation can grasp the difference between the performance of the first absorbent article 15 and the performance of the second absorbent article 16 by the difference in the color of the target area 95, and perform alignment with the same sense using markings of substantially the same color. More preferably, the color of the target center 951 of the first absorbent article 15 and the color of the target center 951 of the second absorbent article 16 may be different.

[0051] Although the present invention has been described in detail using the embodiments described above, it will be clear to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description herein is for illustrative purposes only and is not intended to be restrictive in any way to the present invention. [Explanation of Symbols]

[0052] 10, 11, 12, 15, 16: Absorbent articles 20: Marker section 21, 211, 212, 215, 216: Skin-side markers 25, 251, 252, 255, 256: Non-skin side markers 27: Side markings 29: Coloring section 42: Back seat 51: Absorption core 52: Core Wrap 55:Low basis weight part 94: Fastening Tape 95: Target area 951: Center of the target FL: Fold FL1: First fold FL2: Second fold FW: Width fold L: Anteroposterior direction S1: Front girth area S2: Rear girth area S3: Inseam area T: Thickness direction T1: Skin side T2: Non-skin side W: width direction

Claims

1. The front-to-back direction and the width direction perpendicular to the front-to-back direction, An absorbent article having a marking portion for positioning during attachment, The marking portion extends in the front-to-back direction, straddling the center of the absorbent article in the width direction, and includes a skin-side marking portion visible from the skin side of the absorbent article, and the center of the absorbent article in the width direction. It has a non-skin side marker portion that extends in the front-rear direction across the absorbent article and is visible from the non-skin side of the absorbent article, The skin-side marker portion is positioned outside the absorption core in the front-rear direction. The area of ​​the non-skin side marker portion is larger than the area of ​​the skin side marker portion. The aforementioned marker portion is composed of a colored portion, The absorbent article has a non-skin-side marker portion that is lighter in color than the skin-side marker portion.

2. The marker portion is positioned on both sides in the width direction relative to the skin-side marker portion and has side marker portions that are visible from the skin side of the absorbent article. The absorbent article according to claim 1, wherein the color of the side mark portion is different from the color of the skin-side mark portion.

3. The absorbent core has a liquid-impermeable back sheet positioned on the non-skin side, The absorbent article according to claim 1, wherein the skin-side marker portion and the non-skin-side marker portion are composed of the same colored portion attached to the skin-side surface of the back sheet.

4. The aforementioned absorption core has a low basis weight portion where the basis weight of the absorption material is lower than that of the surrounding area. The absorbent article according to claim 3, wherein the colored portion overlaps the low basis weight portion.

5. The absorbent article according to claim 4, wherein the length in the width direction of the colored portion is longer than the length in the width direction of the low basis weight portion that overlaps with the colored portion.

6. The low basis weight portion is a slit formed in the absorption core, The absorbent article according to claim 4, wherein the core wrap covering the skin side of the absorbent core and the core wrap covering the non-skin side of the absorbent core are joined at the slit.

7. The absorbent article according to any one of claims 1 to 6, wherein the wavelength of visible light of the skin-side marker portion and the wavelength of visible light of the non-skin-side marker portion are 565 Nm or more and 740 Nm or less.

8. The absorbent article has a crotch area positioned in the center in the front-to-back direction and between the legs of the wearer, The rear torso area is located behind the aforementioned crotch area, The front torso area is located in front of the aforementioned crotch area, The fastening tape extends outward in the width direction in the rear waist area and fastens to a target area provided on the non-skin surface of the front waist area, The absorbent article according to any one of claims 1 to 6, wherein the skin-side marker portion and the non-skin-side marker portion are provided in the front waist area and the rear waist area, respectively.

9. The target area spans the center of the absorbent article in the width direction and has a target central portion that is darker in color than the surrounding area. The absorbent article according to claim 8, wherein the length in the width direction of the non-skin side marker portion is shorter than the length in the width direction of the central portion of the target.

10. The outer portion of the absorbent article in the width direction is folded inward in the width direction before use. The absorbent article according to claim 8, wherein the skin-side marker portion is folded inward in the width direction and is covered by at least one of the width direction sides of the absorbent article.

11. The absorbent article according to claim 10, wherein the skin-side marker portion is folded inward in the width direction and is covered by both outer portions of the absorbent article in the width direction.

12. The absorbent article has, when folded inward in the width direction, a first folded portion that is folded inward in the width direction starting from a first fold located outside the width direction of the absorbent core, and a second folded portion that is folded outward in the width direction and toward the skin, starting from a second fold located at the inner edge of the first folded portion in the width direction. The absorbent article according to claim 10, wherein 50% or more of the total area of ​​the skin-side marker portion is covered by at least one of the first folded portion and the second folded portion, in a state where it is folded with the first fold and the second fold as the starting points.

13. The skin-side marker portion in the front waist area and the skin-side marker portion in the rear waist area are each covered by the outer portion in the width direction of the absorbent article. The absorbent article according to claim 10, wherein the number of sheets covering the skin-side marker portion in the rear waist area is greater than the number of sheets covering the skin-side marker portion in the front waist area.

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