Underpants type absorbent article

Abstract

To provide an underpants type absorbent article that allows a wearer to easily recognize the position of a leg opening while easily generating a sense of unity in appearance.SOLUTION: In an underpants-type absorbent article, an absorbent body includes leg gather portions on both side portions in the right-left direction, and at least one of a skin side sheet and a non-skin side sheet of one side waist portion is a colored sheet entirely of a predetermined color, In an unfolded and stretched state, when a region along the leg opening of a lower end portion of the one side waist portion and having a predetermined width in the longitudinal direction on one side in the right-left direction as viewed from the skin side is defined as a lower end portion region, and a region along the leg opening of a side end portion of the leg gather portion and having a predetermined width in the right-left direction is defined as a side end portion region, a color of the lower end portion region is a color similar to the predetermined color as viewed from the skin side, the side end portion region includes a portion having a color similar to the predetermined color, and a color of the similar color of the lower end portion region and a color of the similar color of the side end portion region are different in color density.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pants-type absorbent article. [Background technology]

[0002] Pant-type absorbent articles, such as disposable diapers, have been known as absorbent articles for absorbing excrement such as urine and feces. Generally, a pant-type absorbent article is worn by passing a wearer's legs through a pair of leg openings and pulling the pant-type absorbent article up from the crotch side toward the head. Regarding wearing a pant-type absorbent article, for example, Patent Document 1 discloses a disposable diaper in which the diaper is colored blue almost entirely when viewed from the outside, including the ventral and dorsal regions, and the edge of the dorsal region on the waist opening side is colored white, thereby making it easy to distinguish between the front and back of the diaper. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-103696 Summary of the Invention [Problem to be solved by the invention]

[0004] As in the diaper of Patent Document 1, it is preferable to color the diaper substantially entirely blue to create a sense of uniformity in appearance of the diaper and also to make it easier for the wearer to put on the pants-type absorbent article, but if the parts forming the leg openings are all the same color, as in the diaper of Patent Document 1, there is a problem that when the wearer looks at the leg openings through the waist opening, it is difficult for the wearer to recognize the position of the leg openings through which the wearer should put their legs if the parts forming the leg openings are all a uniform color. In particular, there is a problem that it is difficult for infants to recognize not only the position of the leg openings but also the existence of the leg openings when the parts forming the leg openings are a uniform color.

[0005] Therefore, the present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a pants-type absorbent article that makes it easy for the wearer to recognize the position of the leg openings while easily creating a sense of uniformity in appearance. [Means for solving the problem]

[0006] The main invention for achieving the above object is a pants-type absorbent article comprising a pair of waist-line sections and an absorbent main body having a liquid-absorbent absorbent core, the pair of waist-line sections comprising one side waist-line section and another side waist-line section made of a member separate from the one side waist-line section, a waist-line opening formed by joining both side end sections of the pair of waist-line sections at a joining section, and a pair of leg-line openings, the article having a longitudinal direction, a left-right direction and a thickness direction which intersect with one another in an unfolded and stretched state, the one side waist-line section being located at one end side in the longitudinal direction and the other side waist-line section being located at the other end side in the longitudinal direction, the absorbent main body having one end side in the longitudinal direction joined to the one side waist-line section and the other end side in the longitudinal direction joined to the other side waist-line section, the absorbent main body having leg gather sections on both left and right sides, the leg gather sections being located between a pair of gathered sheet sections and a pair of gathered sheet sections and leg-opening elastic members provided on the waistline of the one side, the one side waistline portion having a skin-side sheet adjacent to the skin-side elastic member stretchable in the left-right direction and a non-skin-side sheet adjacent to the skin-side elastic member, at least one of the skin-side sheet and the non-skin-side sheet being a sheet having a predetermined color over its entire area, and when, as viewed from the skin side, a region of the lower end of the one side waistline portion that is aligned with the leg-openings and has a predetermined width in the longitudinal direction is defined as a bottom end region, and a region of the side end of the leg gathers that is aligned with the leg-openings and has the predetermined width in the left-right direction is defined as a side end region, the color of the bottom end region is similar to the predetermined color when viewed from the skin side, and the side end region has a portion that is similar in color to the predetermined color, and the similar color of the bottom end region and the similar color of the side end region are different in intensity. Other features of the present invention will become apparent from the description of this specification and the accompanying drawings. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a pants-type absorbent article that allows the wearer to easily recognize the positions of the leg openings. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a pants-type disposable diaper 1. FIG. [Figure 2] 1 is a plan view of the diaper 1 in an unfolded and stretched state, as viewed from the skin side. [Figure 3] 1 is a plan view of the diaper 1 in an unfolded and stretched state, viewed from the non-skin side. [Figure 4] FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 5] FIG. 2 is an explanatory diagram of the absorbent body 10. [Figure 6] FIG. 6 is a cross-sectional view taken along the arrow BB in FIG. 5. [Figure 7] FIG. 2 is a diagram illustrating the visibility of the diaper 1 as viewed from the skin side. [Figure 8] FIG. 2 is a diagram illustrating the visibility of the diaper 1 as viewed from the non-skin side. [Figure 9] 10 is a schematic diagram showing the state when the leg openings LH are viewed from the waist opening BH. FIG. [Figure 10] The measurement results for Diaper 1 and Diaper 100 are shown. DETAILED DESCRIPTION OF THE INVENTION

[0009] At least the following matters will become clear from the description of this specification and the accompanying drawings. (Aspect 1) a pair of waist-line sections and an absorbent main body having a liquid-absorbent absorbent core, the pair of waist-line sections comprising one side waist-line section and another side waist-line section made of a member separate from the one side waist-line section; a waist-line opening formed by joining both side ends of the pair of waist-line sections at a joining section; and a pair of leg-line openings; the article has a longitudinal direction, a left-right direction, and a thickness direction which intersect with one another in an unfolded and extended state; the one side waist-line section is located at one end side of the longitudinal direction, and the other side waist-line section is located at the other end side of the longitudinal direction; the absorbent main body has one end side joined to the one side waist-line section and the other end side joined to the other side waist-line section; the absorbent main body has leg gather sections on both left-right sides, the leg gather sections being formed by joining a pair of gathered sheet sections and leg-line openings formed between the pair of gathered sheet sections; and an elastic member, wherein the one side waistline portion has a skin-side sheet adjacent to the waistline elastic member that is stretchable in the left-right direction from the skin side, and a non-skin-side sheet adjacent to the waistline elastic member from the non-skin side, at least one of the skin-side sheet or the non-skin-side sheet is a sheet with a predetermined color over its entire area, and when viewed from the skin side, on one side in the left-right direction, a region of the lower end of the one side waistline portion that is aligned with the leg openings and has a predetermined width in the longitudinal direction is defined as a bottom end region, and a region of the side end of the leg gather portion that is aligned with the leg openings and has the predetermined width in the left-right direction is defined as a side end region, the color of the bottom end region is similar to the predetermined color when viewed from the skin side, and the side end region has a portion that is similar in color to the predetermined color, and the similar color of the bottom end region and the similar color of the side end region are different in intensity.

[0010] According to the pants-type absorbent article of aspect 1, at least a portion of one side waist portion and leg gathered portion have portions of similar color, which makes it easier to create a unified appearance for the entire pants-type absorbent article, and since the lower end region and the side end region that form the leg openings have different color intensities when viewed from the skin side, it becomes easier for the wearer to recognize the position of the leg openings, making it easier to put on the pants-type absorbent article.

[0011] (Aspect 2) a pair of waist-line sections and an absorbent main body having a liquid-absorbent core, the pair of waist-line sections comprising one side waist-line section and another side waist-line section made of a separate member from the one side waist-line section; a waist-line opening formed by joining both side ends of the pair of waist-line sections at a joining section; and a pair of leg-line openings; the article has a longitudinal direction, a left-right direction, and a thickness direction which intersect with one another in an unfolded and extended state; the one side waist-line section is located at one end side in the longitudinal direction, and the other side waist-line section is located at the other end side in the longitudinal direction; one end of the absorbent main body in the longitudinal direction is joined to the one side waist-line section and the other end of the longitudinal direction is joined to the other side waist-line section; the absorbent main body has leg gather sections on both left and right sides, respectively; and the leg gather sections are formed of a pair of gathered sheet sections and a pair of gathered sheet sections. and leg-opening elastic members provided between the waistband members, wherein the one-side waistband portion has a skin-side sheet adjacent to the skin-side elastic members stretchable in the left-right direction and a non-skin-side sheet adjacent to the waistband elastic members from the non-skin-side, and at least one of the skin-side sheet and the non-skin-side sheet is a sheet having a predetermined color over its entire area, and when, on one side in the left-right direction as viewed from the skin side, a region of the lower end of the one-side waistband portion that is aligned with the leg-openings and has a predetermined width in the longitudinal direction is defined as a bottom end region, and a region of the side end of the leg gathered portion that is aligned with the leg-openings and has the predetermined width in the left-right direction is defined as a side end region, the color of the bottom end region is similar to the predetermined color as viewed from the skin side, and the side end region has a portion that is similar in color to the predetermined color, and a difference between the similar color of the bottom end region and the similar color of the side end region is defined as an L. * a * b * The pants-type absorbent article is characterized by a color difference of greater than 6.0 in a color system.

[0012] According to the pants-type absorbent article of aspect 2, at least a portion of one side waist portion and leg gathered portion have portions of similar color, which makes it easier to create a unified appearance for the entire pants-type absorbent article, and since the lower end region and the side end region that form the leg openings are different colors when viewed from the skin side, it becomes easier for the wearer to recognize the position of the leg openings, making it easier to put on the pants-type absorbent article.

[0013] (Aspect 3) The pants-type absorbent article of aspect 1 or 2 is characterized in that it has a pair of leakproof wall portions on both sides in the left-right direction, the leakproof wall portions comprising a leakproof wall sheet along the longitudinal direction and a leakproof wall stretch member that stretches in the longitudinal direction, the leakproof wall portions having an upstanding portion that can stand on the skin side and a fixed portion that cannot stand, and when a region of the leakproof wall portions that overlaps with the side end region in the longitudinal direction and a region along the longitudinal direction that has the predetermined width in the left-right direction from the tip of the upstanding portion is defined as an upstanding portion tip region, the similar color of the side end region and the color of the upstanding portion tip region have different darknesses when viewed from the skin side.

[0014] According to the pants-type absorbent article of aspect 3, it is easier for the wearer to recognize the difference between the leg gathered portion and the leakage barrier portion, making it easier for the wearer to recognize the position of the leg openings and making it easier to put on the pants-type absorbent article.

[0015] (Aspect 4) The pants-type absorbent article of any one of aspects 1 to 3 is characterized in that it has a pair of leakproof wall portions on both sides in the left-right direction, the leakproof wall portions comprising a leakproof wall sheet along the longitudinal direction and a leakproof wall stretch member that stretches in the longitudinal direction, the leakproof wall portions having an upstanding portion that can stand on the skin side and a fixed portion that cannot stand, and when a region of the leakproof wall portions that overlaps with the side end region in the longitudinal direction and a region along the longitudinal direction that has the predetermined width in the left-right direction from the tip of the upstanding portion is defined as an upstanding portion tip region, the similar color of the side end region is a different color from the color of the upstanding portion tip region.

[0016] According to the pants-type absorbent article of aspect 4, it is easier for the wearer to recognize the difference between the leg gathers and the leakage barriers, making it easier for the wearer to recognize the position of the leg openings and making it easier to put on the pants-type absorbent article.

[0017] (Aspect 5) A pants-type absorbent article according to any one of aspects 1 to 4, characterized in that it has a pair of leakproof wall portions on both sides in the left-right direction, the leakproof wall portions comprising a leakproof wall sheet along the longitudinal direction and a leakproof wall stretch member that stretches in the longitudinal direction, the leakproof wall portions having an upstanding portion that can stand up against the skin and a fixed portion that cannot stand up, and on one side in the left-right direction, at the center of the longitudinal direction of the pants-type absorbent article, the left-right length of the upstanding portion is shorter than the length from the base end of the upstanding portion to the side end of the leg gathered portion.

[0018] According to the pants-type absorbent article of aspect 5, even if the upright portions of the leakage-proof wall portions are folded outward in the left-right direction when the wearer tries to put on the pants-type absorbent article, at least a portion of the side end regions of the leg gathered portions can be easily seen, and the color of the side end regions makes it easier for the wearer to recognize the position of the leg openings, making it easier to put on the pants-type absorbent article.

[0019] (Aspect 6) The pants-type absorbent article of any one of aspects 1 to 5 is characterized in that the pair of gathered sheet portions are each a colored nonwoven fabric sheet, a film sheet is provided between the pair of gathered sheet portions, and on one side in the left-right direction, the side edge of the film sheet is provided inside in the left-right direction from the side edge of the pair of gathered sheet portions.

[0020] According to the pants-type absorbent article of aspect 6, the pair of gathered sheet portions made of colored nonwoven fabric sheets and the film sheet placed between the pair of gathered sheet portions make it easier to keep the leg gathered portions flat in the left-right direction, making it easier for the wearer to recognize the color of the side edge regions that form the leg openings.By placing the side edges of the film sheet laterally inward from the side edges of the pair of gathered sheet portions, at least the areas near the side edges of the side edge regions do not overlap with the film sheet, thereby reducing the risk of discomfort to the wearer's legs due to the rigidity of the film sheet.The color near the side edges of the side edge regions can be the color of the pair of gathered sheet portions made of colored nonwoven fabric sheets, making it easier for the wearer to recognize the position of the leg openings.

[0021] (Aspect 7) The pants-type absorbent article of aspect 6 is characterized in that, when viewed from the skin side, the color of the area where the pair of gathered sheet portions and the film sheet do not overlap is darker than the color of the area where the pair of gathered sheet portions and the film sheet overlap.

[0022] According to the pants-type absorbent article of aspect 7, the color near the side edges of the side edge region, which is the area where the pair of gathered sheet portions and the film sheet do not overlap, is darker than the color of the area where the pair of gathered sheet portions and the film sheet overlap, making it easier for the wearer to recognize the outline of the leg openings and making it easier for the wearer to put on the pants-type absorbent article.

[0023] (Aspect 8) The pants-type absorbent article of any of aspects 1 to 7 is characterized in that, in the one-side waistline portion, the color of the skin-side sheet and the color of the non-skin-side sheet are different, one end of the skin-side sheet in the longitudinal direction and one end of the non-skin-side sheet in the longitudinal direction are located at different positions, the other-side waistline portion has a other-side skin-side sheet adjacent to the other-side waistline stretch member that is stretchable in the left-right direction from the skin side, and a other-side non-skin-side sheet adjacent to the other-side waistline stretch member from the non-skin side, at least one of the other-side skin-side sheet and the other-side non-skin-side sheet is a sheet of a similar color to the specified color throughout, and the other end of the other side skin-side sheet in the longitudinal direction and the other end of the other side non-skin-side sheet are located at the same position.

[0024] According to the pants-type absorbent article of aspect 8, when in pants form, the color of the upper end of one side waist portion is different from the color of the upper end of the other side waist portion, so that the one side waist portion and the other side waist portion can be distinguished, making it easier for the wearer to recognize the front-to-back direction of the pants-type absorbent article.

[0025] (Aspect 9) In the one-side waistband portion, the skin side sheet and the non-skin side sheet have different colors, A pants-type absorbent article according to any one of aspects 1 to 8, characterized in that one end of the skin-side sheet in the longitudinal direction and one end of the non-skin-side sheet in the longitudinal direction are located at different positions, and when viewed from the skin side, the similar color of the side end region is darker than the similar color of the lower end region, and the similar color of the lower end region is darker than the similar color of the region of the one-side waistband where the skin-side sheet and the non-skin-side sheet do not overlap.

[0026] According to the pants-type absorbent article of aspect 9, the colors of similar colors become darker from the waist opening to the leg openings of the pants-type absorbent article when it is in the pants-like state, making it easier for the wearer to intuitively recognize the area where they will put their legs through, making it easier for the wearer to put on the pants-type absorbent article.

[0027] (Aspect 10) The pants-type absorbent article of any one of aspects 1 to 9 is characterized in that the one-side waist portion is a sheet of the specified color entirely on either the skin-side sheet or the non-skin-side sheet, and the other is a sheet that is not colored entirely.

[0028] According to the pants-type absorbent article of aspect 10, by making one side waist region, lower end region and side end region a predetermined color or a similar color, the pants-type absorbent article has an overall sense of unity, while by making one side waist region by layering a sheet of a predetermined color and a white sheet, the similar color of one side waist region is softened, softening the impression of the pants-type absorbent article while making the similar color of the side end region appear darker, thereby improving the impression of the pants-type absorbent article to the wearer and making it easier for the wearer to recognize the position of the leg openings, making the pants-type absorbent article easier to wear.

[0029] (Aspect 11) A pants-type absorbent article according to any one of aspects 1 to 10, characterized in that it has a pair of leakproof wall portions on both sides in the left-right direction, the leakproof wall portions comprising a leakproof wall sheet along the longitudinal direction and a leakproof wall stretch member that stretches in the longitudinal direction, the leakproof wall portions having an upstanding portion that can stand up on the skin side and a fixed portion that cannot stand up, and the area between the base ends of the upstanding portions on both sides in the left-right direction is white when viewed from the skin side.

[0030] According to the pants-type absorbent article of aspect 11, the area between the base ends of the standing portions is white, making it easy to check the state of the absorbed excrement when wearing the article, and the wearer can easily recognize the position of the leg openings by visually checking the similar color of the side end areas against the white color of the central part in the left-right direction of the pants-type absorbent article, making it easier to wear the pants-type absorbent article.

[0031] (Aspect 12) a pair of leak-proof wall portions on both sides in the left-right direction, the leak-proof wall portions including a leak-proof wall sheet along the longitudinal direction and a leak-proof wall stretchable member stretchable in the longitudinal direction, the leak-proof wall portions having an upstanding portion that can stand up on the skin side and a fixed portion that cannot stand up, a region of the pair of waistband portions that is outside the leg gathered portion in the longitudinal direction is defined as a first region, and a region that is inside the lower end of the one-side waistband portion in the longitudinal direction and inside the lower end of the other-side waistband portion and that is also inside the base ends of the upstanding portions on both sides in the left-right direction is defined as a second region; A pants-type absorbent article according to any one of aspects 1 to 11, characterized in that, when the region between the first region and the second region is defined as a second region, when viewed from the non-skin side, 50% or more of the area of ​​each of the first region, the second region, and the side edge region is made up of the similar color parts, the similar color of the side edge region is darker than the similar color of the first region, the similar color of the side edge region is darker than the similar color of the second region, and the similar color of the first region and the similar color of the second region have different intensities.

[0032] According to the pants-type absorbent article of aspect 12, the sense of unity when the pants-type absorbent article is viewed from the non-skin side is improved, while the wearer can more easily recognize the position of the leg openings, making it easier to put on the pants-type absorbent article.

[0033] === Implementation form === Hereinafter, an embodiment of the pants-type absorbent article according to the present invention will be described taking a pants-type disposable diaper for infants as an example. However, the pants-type absorbent article according to the present invention is not limited to pants-type disposable diapers for infants, but can also be applied to pants-type disposable diapers for adults, sanitary shorts, etc.

[0034] ===Configuration of pants-type disposable diaper 1=== FIG. 1 is a perspective view of a pants-type disposable diaper 1 (hereinafter referred to as "diaper 1"). FIG. 2 is a plan view of the diaper 1 in an unfolded and stretched state, viewed from the skin side. FIG. 3 is a plan view of the diaper 1 in an unfolded and stretched state, viewed from the non-skin side. FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 2. FIG. 5 is an explanatory diagram of the absorbent main body 10. FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 2. Note that FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 2 and is also a cross-sectional view taken along the line B-B in FIG. 5. The center line CC shown in FIG. 2 etc. indicates the center of the diaper 1 in the left-right direction, and the center line CL indicates the center of the diaper 1 in the longitudinal direction in the unfolded state.

[0035] In the pants-type state shown in Fig. 1, the diaper 1 has a vertical direction, a horizontal direction, and a front-to-back direction, and is formed with a waist opening BH and a pair of leg openings LH. In the vertical direction, the waist side is the upper side, and the crotch side is the lower side. In the front-to-back direction, the wearer's abdominal side is the front side, and the wearer's back side is the rear side. As shown in Figs. 4 and 6, the direction in which the materials constituting the diaper 1 are layered is referred to as the thickness direction, and the side in contact with the wearer in the thickness direction is referred to as the skin side, and the side not in contact with the wearer is referred to as the non-skin side.

[0036] The diaper 1 is formed of three components: an absorbent main body 10 having a rectangular shape in a plan view, and a pair of waist-surrounding sections 20, 30. Of the pair of waist-surrounding sections 20, 30, the one that is placed against the wearer's abdominal side is referred to as a abdominal waist-surrounding section (other-side waist-surrounding section) 20, and the other that is placed against the wearer's dorsal side is referred to as a dorsal waist-surrounding section (one-side waist-surrounding section) 30. The abdominal waist-surrounding section 20 and the dorsal waist-surrounding section 30 are separate components. Hereinafter, "one end side" and "one side" in the longitudinal direction will be referred to as the dorsal side, and "the other end side" and "other side" will be referred to as the abdominal side. In the following description, the dorsal waist-surrounding section 30 will be referred to as the one-side waist-surrounding section, and the abdominal waist-surrounding section 20 will be referred to as the other-side waist-surrounding section. However, the abdominal waist-surrounding section 20 may be referred to as the one-side waist-surrounding section, and the dorsal waist-surrounding section 30 may be referred to as the other-side waist-surrounding section.

[0037] In the diaper 1 in an unfolded state shown in Fig. 2 etc., the ventral waist portion 20 and the back waist portion 30 are arranged so that their longitudinal directions are aligned with the left-right direction of the diaper 1. Hereinafter, in the diaper 1 in an unfolded state, one side in the longitudinal direction is also referred to as the back side, and the other side is also referred to as the ventral side. The front end (the other end in the longitudinal direction) of the absorbent main body 10 is joined to the center of the ventral waist portion 20 in the left-right direction with an adhesive such as a hot melt adhesive, and the rear end (one end in the longitudinal direction) of the absorbent main body 10 is joined to the center of the back waist portion 30 in the left-right direction with an adhesive. In other words, the ventral waist portion 20 is located on the front side of the absorbent main body 10, and the back waist portion 30 is located on the back side of the absorbent main body 10.

[0038] In the diaper 1 in the unfolded state shown in Figure 2, the longitudinal direction of the absorbent body 10 is arranged along the vertical direction of the diaper 1, the absorbent body 10 is folded in half approximately at the center in the longitudinal direction, and both side ends of the ventral waist portion 20 and both side ends of the dorsal waist portion 30 in the left-right direction of the diaper 1 are joined by welding, adhesive, etc. to form a joint 40, thereby resulting in the diaper 1 in the pants-type state shown in Figure 1.

[0039] The ventral waistline portion 20 and the back waistline portion 30 each have waistline elastic members 23, 33 (e.g., elastic thread) that are stretchable in the left-right direction. The ventral waistline portion 20 has a skin-side sheet 21 adjacent to the waistline elastic member 23 from the skin side, and a non-skin-side sheet 22 adjacent to the waistline elastic member 23 from the non-skin side. The back waistline portion 30 has a skin-side sheet 31 adjacent to the waistline elastic member 33 from the skin side, and a non-skin-side sheet 32 ​​adjacent to the waistline elastic member 33 from the non-skin side. Examples of skin-side sheets 21, 31 and non-skin-side sheets 22, 32 include flexible sheets such as air-through nonwoven fabric, spunbond nonwoven fabric, and SMS nonwoven fabric (spunbond-meltblown-spunbond nonwoven fabric). The waistline elastic members 23, 33 are each an elastic member such as elastic thread. The plurality of waistline elastic members 23 are fixed between the skin side sheet 21 and the non-skin side sheet 22 with an adhesive such as a hot melt adhesive, with gaps between them in the vertical direction and stretched in the horizontal direction. The plurality of waistline elastic members 33 are fixed between the skin side sheet 31 and the non-skin side sheet 32 ​​with an adhesive such as a hot melt adhesive, with gaps between them in the vertical direction and stretched in the horizontal direction. The elastic threads or elastic sheets of the waistline elastic members 23, 33 stretch and contract, allowing the ventral waistline portion 20 and the back waistline portion 30 to fit the waist of the wearer.

[0040] The ventral waistline portion 20 and the back waistline portion 30 each have folded-back portions 24, 34 formed by folding back the upper ends of the non-skin side sheets 22, 32 from the non-skin side toward the skin side. These folded-back portions 24, 34 cover the upper ends of the skin side sheets 21, 31, thereby preventing the upper edges of the skin side sheets 21, 31 from digging into the wearer's skin. However, the folded-back portions 24, 34 are not necessarily provided.

[0041] The waistband portions 20, 30 may each include not only skin-side sheets 21, 31 and non-skin-side sheets 22, 32, but also layers of different materials between the skin-side sheets 21, 31 and the non-skin-side sheets 22, 32 in the thickness direction. For example, as in the diaper 1 of this embodiment, the ventral waistband portion 20 and the dorsal waistband portion 30 preferably include skin-side sheets 26 and 36, respectively. Examples of skin-side sheets 26, 36 include flexible sheets such as air-through nonwoven fabrics, spunbond nonwoven fabrics, and SMS nonwoven fabrics (spunbond-meltblown-spunbond nonwoven fabrics). The skin-side sheets 26 and 36 are each a substantially rectangular sheet extending in the left-right direction, and are arranged to cover one end and the other end of the absorbent main body 10 in the longitudinal direction from the skin side, respectively. This prevents the upper edges (ends on one side and the other side in the longitudinal direction) of the absorbent main body 10 from digging into the wearer's skin when the diaper 1 is worn. Note that the skin-contact sheets 26, 36 do not necessarily have to be provided.

[0042] As shown in Figure 4, etc., the absorbent body 10 has an absorbent body 11, a liquid-permeable top sheet 12 arranged on the skin side of the absorbent body 11, a liquid-impermeable back sheet 13 arranged on the non-skin side of the absorbent body 11, and an outer sheet 14 arranged on the non-skin side of the back sheet 13.

[0043] 2 and other figures, the absorbent body 11 has a liquid-absorbent core 11A that absorbs and retains excreted liquids such as urine, and a liquid-permeable core wrap sheet 11B that covers the absorbent core 11A. An example of the absorbent core 11A is one in which liquid-absorbent fibers such as pulp containing superabsorbent polymer (SAP) are molded into a predetermined shape. Note that the absorbent core 11A does not necessarily have to be covered with the core wrap sheet 11B.

[0044] The top sheet 12 is a liquid-permeable sheet, and may be, for example, a hydrophilic air-through nonwoven fabric or spunbond nonwoven fabric. In this embodiment, as shown in Figure 6, both left and right sides are folded back to the non-skin side so as to encase the absorbent body 11. The back sheet 13 is a liquid-impermeable sheet, and may be, for example, a film sheet such as a resin film. The exterior sheet 14 is a flexible sheet, and may be, for example, an air-through nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric (spunbond-meltblown-spunbond nonwoven fabric), or the like.

[0045] As shown in FIG. 5 and other figures, the absorbent main body 10 has a pair of leakage preventing wall portions 15 on both left and right sides. The pair of leakage preventing wall portions 15 are so-called three-dimensional gather portions. Each of the pair of leakage preventing wall portions 15 has a standing portion 15b that can stand up toward the skin side and a fixed portion 15a that cannot stand up. The leakage preventing wall portions 15 include a leakage preventing wall sheet 151 and a leakage preventing wall stretchable member 152 such as rubber thread. In the diaper 1, the leakage preventing wall stretchable member 152, which is made of a plurality of rubber threads, is fixed in a stretched state between the folded leakage preventing wall sheets 151 using an adhesive such as a hot melt adhesive. When the leakage preventing wall stretchable member 152 contracts, the standing portion 15b of the leakage preventing wall portion 15 stands up toward the skin side. The leak barrier sheets 151 are fixed to each other and to the top sheet 12 in adhesive regions A1 from the front end to the rear end along the longitudinal direction of the leak barrier sheets 151, and both longitudinal end portions of the leak barrier sheets 151 are fixed to the top sheet 12 in adhesive regions A2 on the left-right inner side of the adhesive region A1. The standing portions 15b of the diaper 1 are on the left-right inner side of the adhesive region A1 and on the longitudinal inner side of the adhesive region A2.

[0046] 2 and other figures, leg gathers 16 are provided on both sides of the absorbent main body 10 in the left-right direction, outside the leakage preventing walls 15 in the left-right direction. The pair of leg gathers 16 provided on the absorbent main body 10 are each provided along the leg openings LH. The leg gathers 16 have a pair of gathered sheet portions 161, a leg elastic member 162, and a film sheet 163. The leg elastic member 162 stretches and contracts, allowing the leg gathers 16 to fit around the legs of the wearer.

[0047] The pair of gathered sheet portions 161 is formed by folding back a single nonwoven fabric sheet to form a skin-side gathered sheet portion 161a located on the skin side and a non-skin-side gathered sheet portion 161b located on the non-skin side of the skin-side gathered sheet portion 161a. Note that the pair of gathered sheet portions 161 may be formed such that the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b are separate sheets.

[0048] The leg elastic members 162 are elastic members that are stretchable in the longitudinal direction, and examples thereof include rubber threads and elastic nonwoven fabrics. The leg elastic members 162 are fixed in a state in which they are stretched in the longitudinal direction between the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b. When rubber threads are used as the leg elastic members 162, it is preferable to arrange multiple rubber threads, and more preferably five or more. The leg elastic members 162 of this embodiment are provided with five to six rubber threads that are stretchable in the longitudinal direction and are arranged at intervals in the left-right direction.

[0049] The film sheet 163 is a liquid-impermeable sheet member, and examples of the material for the film sheet 163 include liquid-impermeable films mainly made of polyethylene (PE), polypropylene (PP), etc., breathable films, and composite sheets in which a liquid-impermeable film is laminated on one side of a nonwoven fabric such as spunbond. Also, hydrophobic nonwoven fabric, impermeable plastic film, and laminate sheets of nonwoven fabric and impermeable plastic film may be used.

[0050] By arranging a plurality of rubber threads at intervals in the left-right direction as the leg stretchable member 162, the leg gathered parts 16 can be easily brought into surface contact with the wearer's legs, and the leg gathered parts 16 can be easily fitted to the wearer's legs. Furthermore, by providing the leg gathers 16 with the film sheet 163, the rigidity of the leg gathers 16 can be easily increased, the leg gathers 16 can be easily brought into contact with the wearer's legs as a whole, and the leg gathers 16 can be easily fitted to the wearer's legs as a whole.

[0051] ===Visibility of Diaper 1=== In order to improve aesthetic appeal, it is preferable that pant-type absorbent articles such as disposable diapers have a uniform appearance. The uniform appearance of pant-type absorbent articles is easily achieved by color. However, if pant-type absorbent articles are all the same color, there is a problem that when putting on the pant-type absorbent article, it is difficult for the wearer to recognize the position of the leg openings when putting their legs through the waist openings and toward the leg openings. In particular, as infants grow, they themselves try to put their legs through the leg openings of the pant-type absorbent article, but they are unable to accurately recognize the existence of the leg openings and the positions where they should put their legs, which causes problems such as difficulty in putting on the article or the wearer losing their balance and being more likely to fall.

[0052] In contrast, the diaper 1 has the following features, which make it easier to create a unified appearance for the entire diaper 1 while making it easier for the wearer to recognize the position of the leg openings LH of the diaper 1, making the diaper 1 easier to put on. In the following, the features of the diaper 1 will be mainly described on one side in the left-right direction of the diaper 1, but as with the diaper 1 of this embodiment, the diaper 1 may have a shape symmetrical with respect to the center CC in the left-right direction and the other side in the left-right direction may have the same configuration as the one side in the left-right direction. It is also possible that the features of the diaper 1 are provided only on one side in the left-right direction and not on the other side in the left-right direction.

[0053] Fig. 7 is a diagram illustrating the visibility of the diaper 1 as viewed from the skin side. Fig. 8 is a diagram illustrating the visibility of the diaper 1 as viewed from the non-skin side. Fig. 9 is a schematic diagram showing the state when viewed from the waist opening BH to the leg opening LH. For convenience, Figs. 7 and 8 omit components such as the elastic members 23, 33 of the diaper 1 shown in Figs. 2 and 3, respectively.

[0054] As described above, the diaper 1 is a so-called three-piece pants-type disposable diaper having an absorbent main body 10 with a liquid-absorbent absorbent core 11A, a back waist portion 30, and a ventral waist portion 20 which is a separate member from the back waist portion 30, and has a waist opening BH and a pair of leg openings LH which are formed by joining both side portions of the pair of waist portions 20, 30 at joining portions 40. In the unfolded and stretched state, the ventral waist portion 20 is located at the front end side, and the back waist portion 30 is located at the rear end side, and the absorbent main body 10 has its front end joined to the ventral waist portion 20 and its rear end joined to the rear waist portion 30. The absorbent main body 10 has leg gathered portions 16 on both left and right sides. The leg gathered portions 16 include a pair of gathered sheet portions 161 (skin-side gathered sheet portion 161a and non-skin-side gathered sheet portion 161b) and a leg-hole stretchable member 162 provided between the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b.

[0055] The back waist portion 30 includes a skin-side sheet 31 adjacent to the skin side of the waist stretch member 33, which is stretchable in the left-right direction, and a non-skin-side sheet 32 ​​adjacent to the non-skin side of the waist stretch member 33, and at least one of the skin-side sheet 31 and the non-skin-side sheet 32 ​​is a colored sheet of a "predetermined color" throughout its entire area. In the diaper 1 of this embodiment, the skin-side sheet 31 is a blue (colored) sheet, and the non-skin-side sheet 32 ​​is a white sheet. 7 and 8, when the diaper 1 is in an unfolded and stretched state and viewed from the skin side, the region of the lower end of the back waist portion 30 on one side in the left-right direction that is aligned with the leg opening LH and has a predetermined width X1 in the longitudinal direction is referred to as the back lower end region KRb, and the region of the side end of the leg gather portion 16 that is aligned with the leg opening LH and has a predetermined width X1 in the left-right direction is referred to as the side end region TR. In this case, when the diaper 1 is viewed from the skin side, the color of the back-side lower end region KRb is a similar color (blue-based) to the predetermined blue color of the skin-side sheet 31. The side end regions TR also have portions that are similar in color to the predetermined blue color of the skin-side sheet 31. Furthermore, the similar color (blue) of the back-side lower end region KRb and the similar color (blue-based) of the side end regions TR have different shades.

[0056] In the diaper 1 of this embodiment, the nonwoven fabric fibers forming the skin-side sheet 31 are themselves colored blue, so that the entire skin-side sheet 31 is blue (colored). The nonwoven fabric fibers forming the non-skin-side sheet 32 ​​are themselves colored white, so that the entire non-skin-side sheet 32 ​​is white. As a result, when the diaper 1 is viewed from the skin side, the blue color of the skin-side sheet 31 in the back-side waistband portion 30 can be seen, and when the diaper 1 is viewed from the non-skin side, the blue color of the skin-side sheet 31 can be seen through the white color of the non-skin-side sheet 32. Therefore, the blue color of the back-side waistband portion 30 can be seen in the appearance of the diaper 1.

[0057] In the diaper 1 of this embodiment, the skin-facing sheet 36 and the folded-over portion 34 are located closer to the skin than the skin-facing sheet 31, so that the blue color of the skin-facing sheet 31 in the back-side waistband portion 30 appears lighter when the diaper 1 is viewed from the skin side. Specifically, because the non-skin-facing sheet 32 ​​and the skin-facing sheet 36 are white, when the diaper 1 is viewed from the skin side, the color of the portion of the back-side waistband portion 30 where the folded-over portion 34 and the skin-facing sheet 36 overlap is lighter than the color of the back-side lower end region KRb. When viewed from the skin side, the color of the portion that overlaps the skin-facing sheet 36 but does not overlap the folded-over portion 34 is darker than the color of the portion where the folded-over portion 34 and the skin-facing sheet 36 overlap, and lighter than the color of the back-side lower end region KRb.

[0058] In the diaper 1 of this embodiment, the entire skin side sheet 31 is a sheet of a predetermined color, but this is not limited to this. The entire non-skin side sheet 32 ​​may be a sheet of a predetermined color, or both the skin side sheet 31 and the non-skin side sheet 32 ​​may be sheets of a predetermined color.

[0059] The leg gathered portion 16 of the diaper 1 of this embodiment is formed by folding back a single blue sheet to form the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b. The sheets forming the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b are made of nonwoven fabric fibers colored blue. Therefore, the entire skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b are each blue, and the entire gathered sheet portion 161 is blue. However, the entire skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b do not necessarily have to be blue (the same color as the skin-side sheet 31). It is sufficient that at least a portion of the side edge region TR is blue (the same color) visible from both the skin side and the non-skin side. Preferably, in the side edge regions TR, the blue parts of the leg gathers 16 are continuous in the longitudinal direction along the leg openings LH, which allows the wearer to easily recognize the position of the leg openings LH by the blue parts of the side edge regions TR when wearing the garment.

[0060] Among the regions along the leg openings LH, the back-side lower end region KRb has a predetermined longitudinal width X1, and the side end regions TR have a predetermined lateral width X1. The predetermined width X1 can be set to any length. The predetermined width X1 of the diaper 1 of this embodiment is the lateral length X1 of the region along the leg openings LH, when viewed through the thickness of the diaper 1, of the leg gathered portion 16 where the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b overlap, and where no sheet member other than the gathered sheet portion 161, such as the film sheet 163, overlaps. However, if rubber thread is used as the leg elastic member 162, the thickness of the rubber thread is thin and has little effect on visibility, so the side end regions TR may be the regions where the rubber thread is provided between the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b.

[0061] "Colored" refers to colors other than colorless, transparent, and white. White includes, for example, the color expressed as "N9.5" in the Munsell color system, and the color expressed as "255,255,255" in the RGB color space (so-called pure white), as well as colors whose color difference from pure white is less than 12. To measure the color difference of white, for example, a color difference meter such as the CR-400 manufactured by Konica Minolta can be used, and the light source of the measuring device can be Illuminant C (standard of the International Commission on Illumination (CIE)). In this case, the diameter of the measuring window of the measuring device is 40 mm. The color difference is measured by measuring the color difference (L * a * b * ) color space. The color difference relative to a white reference plate can be calculated by measuring the lab values ​​of the white reference plate and the target sample. The white reference plate is set to lab0 with a coordinate system of (X93.19, Y95.20, Z112.28). Here, L is a value that indexes brightness, and a and b are the plane coordinates of chromaticity. If the Lab values ​​of the white reference plate are L0, a0, and b0, and those of the target sample are L1, a1, and b1, then the calculations can be made as follows: ΔL = L0-L1, Δa = a0-a1, and Δb = b0-b1.

[0062] "Similar colors" refers to colors that are different in hue less than 5, lightness less than 1, or saturation less than 1 in the Munsell color system (100 hues), and includes cases where the colors are the same. Preferably, the color difference ΔE is less than 12.0 The color difference can be measured by a known method, for example, by the following method. (1) Measurement is performed using a general-purpose color difference meter (for example, CR-400 manufactured by Konica Minolta, Inc., or an equivalent) (measuring diameter: Φ8 mm) in a thermostatic chamber at 20°C. (2) For the diaper 1 in an unfolded and stretched state placed on a horizontal table, the CIE L * a * b * Measure the coordinates at three or more points by changing the position and calculate the average value (L1 * ,a1 * ,b1 * ) is calculated. (3) CIE L of the part of the sample to be compared * a * b * Measure the coordinates at three or more points at different positions and calculate the average value (L2 * ,a2 * ,b2 * ) is calculated. (4) Calculate the color difference ΔE from the above results. ΔE=〔(L1 * -L2 * ) 2 +(a1 * -a2 * ) 2 +(b1 * -b2 * ) 2 〕 1 / 2

[0063] In this embodiment, the leg gathers 16 have blue-based portions of a similar color, and the side edge regions TR of the leg gathers 16 have blue portions of a similar color to the skin side sheet 31, but the colors of the skin side sheet 31, the back side lower edge region KRb, and the side edge regions TR are not limited to blue. The skin side sheet 31 (or the non-skin side sheet 32) may be any color such as red, pink, purple, green, etc., and the back side lower edge region KRb and the side edge regions TR may be a similar color to the color of the skin side sheet 31.

[0064] The comparison of the color intensity of each region can be performed by a known method. For example, if the difference in color intensity is noticeable with the naked eye, a method of comparing the color intensity with the naked eye may be adopted. * a * b * Color space L * value and a * value and b * A method of comparing the color intensity of the sample (each region) based on the three elements of the value may also be used. In addition, the color intensity of other regions can be measured in the same way, not just the side edge region TR and the lower back edge region KRb.

[0065] Color intensity L * a * b * When comparing using the three elements of the color system, evaluation can be performed based on the results of measurements made using the following method. In color evaluation, since color unevenness etc. can easily cause fluctuations and errors in the measurement values, multiple measurements should be taken for each target area, and the average of these measurements should be used for the color evaluation. If it is determined with the naked eye that the impact of color unevenness in the target area is small, then the target area should be measured about three times, and if it is determined with the naked eye that the impact of color unevenness in the target area is large, then the target area should be measured more than three times, and the average of the measurement results should be used for the evaluation. (1) Measurement is performed using a general-purpose color difference meter (for example, CR-400 manufactured by Konica Minolta, Inc., or an equivalent) (measuring diameter: Φ8 mm) in a thermostatic chamber at 20°C. (2) For the diaper 1 in an unfolded and stretched state placed on a horizontal table, measure the L of the skin side of the sample in the area to be measured (each area KRb, TR). * a * b * Color space L * a * b * Measure the coordinates at three or more points at different positions. (3) From the measurement results, the color intensity of each area can be evaluated using the following formula 1. Formula 1=(L 2 +a 2 +b 2 ) 1 / 2 The smaller the calculated value of Formula 1, the darker the color. Note that "different color intensities" means that the absolute value of the difference between the values ​​of Formula 1 calculated for multiple regions is 1.0 or more.

[0066] Figure 10 shows the measurement results of diaper 1 and diaper 100, with Figure 10A showing the measurement results of diaper 1 and Figure 10B showing the measurement results of diaper 100. Since the colors of the target areas of diaper 1 and diaper 100 of this embodiment can be judged to be roughly uniform to the naked eye, measurements were taken three times (n1 to n3) for each area. FIG. 10A shows the L values ​​of three points (n1 to n3) on the skin side of the lower back end region KRb, the side end region TR, and the inner region UR of the diaper 1 of the present invention. * value and a * value and b * The graph shows the measurement results of the values, the values ​​calculated from the measurement results using the above-mentioned formula 1, and the color difference obtained from the calculated values. The inner region UR is a region of the leg gathered portion 16 on one side in the left-right direction, which is inside the side end region TR in the left-right direction and outside the side end of one side of the absorbent body 11 in the left-right direction, and is a region where the skin-side gathered sheet portion 161a, the film sheet 163, and the non-skin-side gathered sheet portion 161b overlap. FIG. 10B shows the L values ​​at three points (n1 to n3) on the skin side of the lower edge region KRb on the back side, the side edge region TR, and the inner region UR of the diaper 100, which is a modified example of the diaper 1 of the present invention. * value and a * value and b* The graph shows the measurement results of the values, the values ​​calculated from the measurement results using the above-mentioned formula 1, and the color difference obtained from the calculated values. Diaper 100 has the same overall configuration as diaper 1, and the "predetermined color" of diaper 100 is pink. In other words, diaper 1 and diaper 100 have the same configuration except for the different "predetermined colors." Therefore, parts that are the same as those of diaper 1 are given the same reference numerals, etc.

[0067] As shown in FIG. 10A , the value of Equation 1 calculated from the measurements of the skin-side surface of the side edge regions TR of the diaper 1 and its average value (78.8) are smaller than the value of Equation 1 calculated from the measurements of the skin-side surface of the back-side lower edge region KRb and its average value (83.2). The absolute value of the difference between the calculated values ​​of Equation 1 (the absolute value of the difference between the average values ​​is 4.4) is clearly greater than 1.0. Therefore, the color intensity of the side edge regions TR and the color intensity of the back-side lower edge region KRb are different. Furthermore, since the value of Equation 1 calculated from the measurements of the side edge region TR is smaller than the value of Equation 1 calculated from the measurements of the back-side lower edge region KRb, the side edge regions TR of the diaper 1 are darker in color than the back-side lower edge region KRb.

[0068] As shown in FIG. 10B , the value of Equation 1 calculated from the measurements of the skin-side surface of the side edge regions TR of the diaper 100 and its average value (84.5) are smaller than the value of Equation 1 calculated from the measurements of the skin-side surface of the back-side lower edge region KRb and its average value (87.2). The absolute value of the difference between the calculated values ​​of Equation 1 (the absolute value of the difference between the average values ​​is 2.7) is clearly greater than 1.0. Therefore, the color intensity of the side edge regions TR and the color intensity of the back-side lower edge region KRb are different. Furthermore, since the value of Equation 1 calculated from the measurements of the side edge region TR is smaller than the value of Equation 1 calculated from the measurements of the back-side lower edge region KRb, the side edge regions TR of the diaper 1 are darker in color than the back-side lower edge region KRb.

[0069] In the diaper 1, the entire skin-side sheet 31 is blue (predetermined color), which allows the back waist portion 30 to be visually recognized as blue. Also, as shown in Fig. 9, at least a portion of the leg gathers 16 has a blue portion that is similar in color to the skin-side sheet 31, which allows the blue color of the back waist portion 30 and the leg gathers 16 of the diaper 1 to be visually recognized, which helps to create a unified appearance of the diaper 1, as shown in Fig. 1 etc. Furthermore, as shown in Figure 8, when the diaper 1 is viewed from the skin side, the color density of the side edge region TR, which is similar to the color of the skin side sheet 31, is different from the color density of the back side lower edge region KRb, which is similar to the color of the skin side sheet 31. Therefore, when putting on the diaper 1, when looking through the waist opening BH into the leg opening LH, the boundary between the side edge region TR and the back side lower edge region KRb is easily noticeable, making it easier to recognize the position of the leg opening LH of the diaper 1, giving the wearer a sense of uniformity in appearance while making it easier to put on the diaper 1. In particular, in diaper 1, the color intensity of the side end region TR is different from the color intensity of the back lower end region KRb, and the side end region TR is darker in color than the back lower end region KRb, making it easier for the wearer to recognize the leg gathered portion 16 and the position of the leg opening LH.

[0070] Similarly, in the diaper 100, the entire skin-side sheet 31 is pink (predetermined color), so that the pink color of the back waist portion 30 can be visually recognized. In addition, by providing at least a portion of the leg gathers 16 with a pink-colored portion that is similar in color to the skin-side sheet 31, the similar pink color of the back waist portion 30 and the leg gathers 16 of the diaper 100 can be visually recognized, which makes it easier to create a sense of unity in the appearance of the diaper 1. Furthermore, when the diaper 100 is viewed from the skin side, the color intensity of the side end region TR, which is similar to the color of the skin side sheet 31, is different from the color intensity of the back side lower end region KRb, which is similar to the color of the skin side sheet 31. Therefore, when putting on the diaper 100, when looking through the waist opening BH into the leg opening LH, the boundary between the side end region TR and the back side lower end region KRb is easily noticeable, making it easier to recognize the position of the leg opening LH of the diaper 100, giving the wearer a sense of uniformity in appearance while making it easier to put on the diaper 100. In particular, in the diaper 100, the color intensity of the side end region TR is different from the color intensity of the back lower end region KRb, and the side end region TR is darker in color than the back lower end region KRb, making it easier for the wearer to recognize the leg gathered portion 16 and the position of the leg opening LH.

[0071] Thus, by providing at least portions of the back waist portion 30 and the leg gathered portions 16 with similar colors, the overall appearance of the diaper 1 tends to be uniform, as shown in Fig. 8. When the diaper 1 is viewed from the skin side, the back lower end region KRb and the side end region TR constituting the leg openings LH have different color intensities, as shown in Fig. 7. Therefore, when the wearer looks into the leg openings LH through the waist opening BH, as shown in Fig. 9, the back lower end region KRb and the side end region TR, which are regions along the leg openings LH, can be easily visually identified. This makes it easier for the wearer to recognize the position of the leg openings LH and makes it easier for the wearer to put on the diaper 1.

[0072] Furthermore, the back-side lower end region KRb, which is a region of the back-side waistline portion 30 that lies along the leg-openings LH, is typically not provided with waistline elastic members 33 that stretch in the left-right direction, or even if waistline elastic members 33 are provided, the elasticity of the waistline elastic members 33 is relatively small. In other words, the back-side lower end region KRb is a region that is less likely to shrink in the left-right direction. On the other hand, the side end regions TR, which are regions of the leg gathered portions 16 that lies along the leg-openings LH, are more likely to shrink in the longitudinal direction due to the leg-opening elastic members 162 that stretch in the longitudinal direction. Therefore, when the diaper 1 is viewed from the skin side in the unfolded and stretched state (see FIG. 7 ), if the shades of the similar color (blue) of the back-side lower end region KRb and the similar color (blueish) of the side end regions TR are different, the shades of the similar color (blueish) of the back-side lower end region KRb and the similar color (blueish) of the side end regions TR will be even more different in the natural state of the diaper 1 (see FIG. 1 ). In particular, when the diaper 1 in an unfolded and stretched state is viewed from the skin side, if the similar color (blue) of the side end region TR is darker than the similar color (blue) of the back lower end region KRb, then when the diaper 1 in its natural state is viewed from the skin side, the similar color (blue) of the side end region TR will appear even darker than the similar color (blue) of the back lower end region KRb.Therefore, when the wearer looks at the leg openings LH through the waist opening BH, it will be easier for them to visually recognize the back lower end region KRb and the side end region TR among the areas along the leg openings LH, making it easier for the wearer to recognize the position of the leg openings LH and making it easier for them to put on the diaper 1.

[0073] The diaper 1 includes a skin-side sheet 21 adjacent to the skin-side elastic members 23 stretchable in the left-right direction in both the back waist portion 30 and the ventral waist portion 20, and a non-skin-side sheet 22 adjacent to the non-skin-side elastic members 23, and at least one of the skin-side sheet 21 or the non-skin-side sheet 22 may be entirely colored in a predetermined color. In the diaper 1 of this embodiment, the skin-side sheet 21 in the back waist portion 30 and the ventral waist portion 20 is blue (colored) and the non-skin-side sheet 22 is white.

[0074] 7 and 8, when the diaper 1 is in an unfolded and stretched state and viewed from the skin side, the region of the lower end of the ventral waist portion 20 on one side in the left-right direction that is aligned with the leg openings LH and has a predetermined width X1 in the longitudinal direction is referred to as the ventral lower end region KRf, and the region of the side end of the leg gather portion 16 that is aligned with the leg openings LH and has a predetermined width X1 in the left-right direction is referred to as the side end region TR. In this case, when the diaper 1 is viewed from the skin side, the color of the ventral lower end region KRf is similar to the predetermined blue color of the skin side sheet 21. The side end region TR also has a portion that is similar to the predetermined blue color of the skin side sheet 21. Furthermore, the color depth of the similar color (blue) of the ventral lower end region KRf is different from the color depth of the similar color (blue-based) of the side end region TR.

[0075] In the diaper 1, the nonwoven fabric fibers forming the skin-side sheet 21 are themselves colored blue, so that the entire skin-side sheet 21 is blue (colored). The nonwoven fabric fibers forming the non-skin-side sheet 22 are themselves colored white, so that the entire non-skin-side sheet 22 is white. As a result, when the diaper 1 is viewed from the skin side, the blue color of the skin-side sheet 21 in the ventral waistband 20 can be seen, and when the diaper 1 is viewed from the non-skin side, the blue color of the skin-side sheet 21 can be seen through the white color of the non-skin-side sheet 22. Therefore, the blue color of the ventral waistband 20 can be recognized as part of the appearance of the diaper 1. In the diaper 1 of this embodiment, the skin-side sheet 26 and the folded-back portion 24 are located closer to the skin than the skin-side sheet 21, so that the blue color of the skin-side sheet 21 in the ventral waistline portion 20 appears lighter when the diaper 1 is viewed from the skin side. Specifically, when the diaper 1 is viewed from the skin side, the color of the portion of the ventral waistline portion 20 where the folded-back portion 24 and the skin-side sheet 26 overlap is lighter than the color of the ventral lower end region KRf. When viewed from the skin side, the color of the portion that overlaps the skin-side sheet 26 but does not overlap the folded-back portion 24 is darker than the color of the portion where the folded-back portion 24 and the skin-side sheet 26 overlap and lighter than the color of the ventral lower end region KRf. The entire non-skin-side sheet 22 may be a colored sheet of a predetermined color, or the entire areas of both the skin-side sheet 21 and the non-skin-side sheet 22 may be colored sheets of a predetermined color.

[0076] As described above, in the leg gathered portion 16 of the diaper 1 of this embodiment, the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b are each entirely blue, and the entire gathered sheet portion 161 is also blue. In the leg gathered portion 16, the region along the leg opening LH has a ventral lower end region KRf with a predetermined width X1 in the longitudinal direction, and a side end region TR with a predetermined width X1 in the lateral direction. The predetermined width X1 is a length that can be set arbitrarily.

[0077] In the diaper 1, the entire skin-side sheet 21 is blue (predetermined color), so that the blue color can be visually recognized as the ventral waist portion 20. Furthermore, as shown in Fig. 9, at least a portion of the leg gathers 16 has a blue portion that is similar in color to the skin-side sheet 21, so that the similar blue colors of the ventral waist portion 20 and the leg gathers 16 of the diaper 1 can be visually recognized, which helps to create a sense of uniformity in the appearance of the diaper 1, as shown in Fig. 1 etc. Furthermore, as shown in Figure 8, when the diaper 1 is viewed from the skin side, the color density of the side edge region TR, which is similar to the color of the skin side sheet 21, is different from the color density of the ventral lower edge region KRf, which is similar to the color of the skin side sheet 21. Therefore, when putting on the diaper 1, when looking through the waist opening BH into the leg opening LH, the boundary between the side edge region TR and the ventral lower edge region KRf is easily noticeable, making it easier to recognize the position of the leg opening LH of the diaper 1, giving the wearer a sense of uniformity in appearance while making it easier to put on the diaper 1. In particular, in diaper 1, the color intensity of the side end region TR is different from the color intensity of the ventral lower end region KRf, and the side end region TR is darker in color than the ventral lower end region KRf, making it easier to recognize the leg gathered portion 16 and making it easier for the wearer to recognize the position of the leg opening LH.

[0078] Thus, as shown in Fig. 8, the ventral waist portion 20 and at least a portion of the leg gathered portions 16 have similarly colored portions, which contributes to a uniform appearance of the entire diaper 1. When the diaper 1 is viewed from the skin side, as shown in Fig. 7, the ventral lower end region KRf and the side end region TR constituting the leg openings LH have different color intensities. This makes it easier for the wearer to visually distinguish the ventral lower end region KRf and the side end region TR along the leg openings LH when looking into the leg openings LH through the waist opening BH, as shown in Fig. 9. This makes it easier for the wearer to recognize the position of the leg openings LH and makes it easier for the wearer to put on the diaper 1.

[0079] As described above, the diaper 1 is a so-called three-piece pants-type disposable diaper having an absorbent main body 10 with a liquid-absorbent absorbent core 11A, a back waist portion 30, and a ventral waist portion 20 that is a separate member from the back waist portion 30, and has a waist opening BH and a pair of leg openings LH that are formed by joining both side portions of the pair of waist portions 20, 30 at joining portions 40. In the unfolded and stretched state, the ventral waist portion 20 is located at the front end side, and the back waist portion 30 is located at the rear end side, and the absorbent main body 10 has its front end joined to the ventral waist portion 20 and its rear end joined to the rear waist portion 30. The absorbent main body 10 has leg gathered portions 16 on both left and right sides. The leg gathered portions 16 include a pair of gathered sheet portions 161 (skin-side gathered sheet portion 161a and non-skin-side gathered sheet portion 161b) and a leg-hole stretchable member 162 provided between the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b.

[0080] The back waist portion 30 includes a skin-side sheet 31 adjacent to the skin side of the waist stretch member 33, which is stretchable in the left-right direction, and a non-skin-side sheet 32 ​​adjacent to the non-skin side of the waist stretch member 33, and at least one of the skin-side sheet 31 and the non-skin-side sheet 32 ​​is a colored sheet of a "predetermined color" throughout its entire area. In the diaper 1 of this embodiment, the skin-side sheet 31 is a blue (colored) sheet, and the non-skin-side sheet 32 ​​is a white sheet. 7 and 8, when the diaper 1 is in an unfolded and stretched state and viewed from the skin side, the region of the lower end of the back waist portion 30 on one side in the left-right direction that is aligned with the leg opening LH and has a predetermined width X1 in the longitudinal direction is referred to as the back lower end region KRb, and the region of the side end of the leg gather portion 16 that is aligned with the leg opening LH and has a predetermined width X1 in the left-right direction is referred to as the side end region TR. In this case, when the diaper 1 is viewed from the skin side, the color of the back-side lower end region KRb is a color similar to the predetermined blue color of the skin-side sheet 31. Also, the side end regions TR have portions that are a color similar to the predetermined blue color of the skin-side sheet 31. Furthermore, the L of the color similar to the color (blue) of the back-side lower end region KRb and the color similar to the color (blueish) of the side end regions TR is * a * b * The color difference in the color space is greater than 6.0. * a * b * The color difference in the color system is greater than 6.0, which means that L * a * b * It is easier to recognize the differences in color between each area than when the color difference in the color space is 6.0 or less. The side edge regions TR and the lower back edge region KRb each have a color similar to the predetermined color of the skin side sheet 31. * a * b * In the color system, the a and b values ​​of the side edge region TR are close to the a and b values ​​of the lower back edge region KRb. * a * b * When the color difference in the color system is greater than 6.0, the side end region TR and the lower back end region KRb have different color difference values ​​due to the difference in the L value, which is essentially lightness.

[0081] As described above, the nonwoven fabric fibers forming the skin-side sheet 31 of the diaper 1 are themselves colored blue, so that the entire skin-side sheet 31 is blue (colored). The nonwoven fabric fibers forming the non-skin-side sheet 32 ​​are themselves colored white, so that the entire non-skin-side sheet 32 ​​is white. As a result, when the diaper 1 is viewed from the skin side, the blue color of the skin-side sheet 31 in the back-side waistband portion 30 can be seen, and when the diaper 1 is viewed from the non-skin side, the blue color of the skin-side sheet 31 can be seen through the white color of the non-skin-side sheet 32. Therefore, the blue color of the back-side waistband portion 30 can be seen in the appearance of the diaper 1.

[0082] In the leg gathered portion 16 of the diaper 1 of this embodiment, the sheets constituting the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b are formed from nonwoven fabric fibers colored blue, so that the entire skin-side gathered sheet portion 161a and the entire non-skin-side gathered sheet portion 161b are each a blue-based color, and the entire gathered sheet portion 161 is a blue-based color.

[0083] Of the regions along the leg openings LH, the lower back region KRb has a predetermined width X1 in the longitudinal direction, and the side edge regions TR have a predetermined width X1 in the lateral direction. The predetermined width X1 is a length that can be set arbitrarily. The predetermined width X1 of the diaper 1 of this embodiment is the lateral length X1 of the region along the leg openings LH, when viewed in the thickness direction of the diaper 1, of the region where the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b in the leg gathered portion 16 overlap, and where sheet members other than the gathered sheet portion 161, such as the film sheet 163, do not overlap.

[0084] The color difference between the regions can be measured by a known method, for example, by a method similar to the above-described method for measuring the color difference.

[0085] FIG. 10A shows the results of measuring the L value (L1), a value (a1), and b value (b1) of the side edge region TR and the lower back edge region KRb of the diaper 1, along with the color difference calculated from the respective measurement results. Note that the color difference n1 in FIG. 10A represents the color difference between the n1 results of the L value (L1), a value (a1), and b value (b1) of the side edge region TR and the n2 results of the L value (L2), a value (a2), and b value (b2) of the side edge region TR. The same applies to n2 and n3. As shown in FIG. 10A, the color differences of the side edge region TR and the lower back edge region KRb ranged from 11.0 to 13.7, with an average value of 13.2. Therefore, the color difference is clearly greater than 6.0. This makes it easier to identify the boundary between the side end region TR and the back lower end region KRb at the leg openings LH when the diaper 1 is viewed from the skin side due to the difference in color between the side end region TR and the back lower end region KRb.

[0086] As shown in FIG. 10B, the L value (L1), a value (a1), and b value (b1) of the side edge region TR and the lower back edge region KRb of the diaper 100 (a modified example of the diaper 1) were measured, and the color difference calculated from the results. Note that the color difference n1 in FIG. 10B indicates the color difference between the n1 result of the L value (L1), a value (a1), and b value (b1) of the side edge region TR and the n2 result of the L value (L2), a value (a2), and b value (b2) of the side edge region TR. The same applies to n2 and n3. As shown in FIG. 10B, the color differences of the side edge region TR and the lower back edge region KRb ranged from 10.6 to 11.4, with an average value of 10.9. Therefore, the color difference is clearly greater than 6.0. This makes it easier to identify the boundary between the side end region TR and the back lower end region KRb at the leg openings LH when the diaper 100 is viewed from the skin side due to the difference in color between the side end region TR and the back lower end region KRb.

[0087] In the diaper 1, the entire skin-side sheet 31 is blue (predetermined color), which allows the back waist portion 30 to be visually recognized as blue. Also, as shown in Fig. 9, at least a portion of the leg gathers 16 has a blue portion that is similar in color to the skin-side sheet 31. This allows the back waist portion 30 and the leg gathers 16 of the diaper 1 to be visually recognized as blue, which helps to create a unified appearance of the diaper 1, as shown in Fig. 1 and other figures. As shown in FIG. 8, when the diaper 1 is viewed from the skin side, the color difference between the color of the side edge region TR, which is similar to the color of the skin side sheet 31, and the color of the back side lower edge region KRb, which is similar to the color of the skin side sheet 31, is L. * a * b * When the color difference of the color system is 6.0 or more, when wearing the diaper 1, the boundary between the side end region TR and the lower back end region KRb is easily noticeable when looking through the waist opening BH into the leg opening LH, making it easier to recognize the position of the leg opening LH of the diaper 1, giving the wearer a sense of uniformity in appearance while making it easier to put on the diaper 1. In particular, in diaper 1, the color of the side end region TR is different from the color of the back lower end region KRb, and the side end region TR is darker than the back lower end region KRb, making it easier to identify the leg gathered portion 16 and making it easier for the wearer to identify the position of the leg opening LH.

[0088] 8, the back waist portion 30 and at least a portion of the leg gathers 16 are provided with similarly colored portions, which helps to create a uniform appearance of the entire diaper 1. When the diaper 1 is viewed from the skin side, as shown in FIG. 7, the L between the back lower end region KRb and the side end region TR that form the leg openings LH is clearly visible. * a * b * When the color difference in the color system is 6.0 or more, as shown in Figure 9, when a wearer looks at the leg openings LH from the waist opening BH, it becomes easier for them to visually recognize the back lower end region KRb and the side end region TR among the regions along the leg openings LH, making it easier for the wearer to recognize the position of the leg openings LH and making it easier for them to put on the diaper 1.

[0089] The diaper 1 includes a skin-side sheet 21 adjacent to the skin-side elastic members 23 stretchable in the left-right direction in both the back waist portion 30 and the ventral waist portion 20, and a non-skin-side sheet 22 adjacent to the non-skin-side elastic members 23, and at least one of the skin-side sheet 21 or the non-skin-side sheet 22 may be entirely colored in a predetermined color. In the diaper 1 of this embodiment, the skin-side sheet 21 in the back waist portion 30 and the ventral waist portion 20 is blue (colored) and the non-skin-side sheet 22 is white.

[0090] As described above, the diaper 1 has the leak-barrier wall portion 15, which includes the leak-barrier wall sheet 151 along the longitudinal direction and the leak-barrier stretchable member 152 that stretches in the longitudinal direction. The leak-barrier wall portion 15 has the standing portion 15b that can stand on the skin side and the fixed portion 15a that cannot stand. As shown in Figure 7, the region of the leakage-proof wall portion 15 that overlaps longitudinally with the side end region TR and that extends longitudinally from the tip 15e of the standing portion 15b and has a predetermined width X1 in the left-right direction is referred to as the standing portion tip region SR. In such a case, when the diaper 1 is viewed from the skin side, it is preferable that the color depth of the side end region TR, which has a color similar to the color of the skin side sheet 31 (skin side sheet 21), is different from the color depth of the upright portion tip region SR.

[0091] As described above, in the diaper 1 of this embodiment, the side edge regions TR are a bluish color similar to the blue color of the skin-side sheet 31. Furthermore, since the leak-barrier sheet 151 is a white nonwoven fabric sheet, the upright portion tip regions SR are white. Therefore, the color density of the side edge regions TR differs from that of the upright portion tip regions SR. In this diaper 1, the different color density of the side edge regions TR from that of the upright portion tip regions SR makes it easier to identify the positions of the side edge regions TR and the upright portion tip regions SR when viewing the diaper 1 from the skin side. Therefore, when wearing the diaper 1, looking into the leg-openings LH through the waist-opening BH, it becomes easier to identify the difference between the side edge regions TR adjacent to the leg-openings LH and the leakage-barrier wall portions 15. This allows the wearer to more easily identify the position of the leg-openings LH, making it easier to put on the diaper 1.

[0092] Furthermore, in the case where the leakage barrier wall 15 is provided as described above, it is preferable that the color of the side edge region TR, which is similar to the color of the skin-side sheet 31 (skin-side sheet 21), is different from the color of the upright portion tip region SR of the leakage barrier sheet 151. In the diaper 1 of this embodiment, the side edge region TR is bluish and the upright portion tip region SR is white, so that the colors of the side edge region TR and the upright portion tip region SR are clearly different. This makes it easy to identify the positions of the side edge region TR and the upright portion tip region SR when viewing the diaper 1 from the skin side. Therefore, when wearing the diaper 1, when looking into the leg-openings LH through the waist-opening BH, it is easy to identify the difference between the side edge region TR adjacent to the leg-openings LH and the leakage barrier wall 15. This makes it easier for the wearer to identify the position of the leg-openings LH, making it easier to put on the diaper 1.

[0093] It should be noted that "different in color" can be determined when the difference in color can be recognized visually, or by using a color difference meter. The color difference is measured using a general-purpose color difference meter (for example, CR-400 manufactured by Konica Minolta, or an equivalent) in a temperature-controlled room at 20 degrees. Specifically, the color difference is measured based on the tolerance grades generally used in JIS standards or various industrial associations, for example, L conforming to CIE1976. * a * b * When the color difference (ΔE) calculated by the color difference formula in the color space is 12.0 or more, preferably 25.0 or more, it is determined that the colors are "different."

[0094] Also, when having the leak - proof wall portion 15 as described above, as shown in FIG. 7, on one side in the left - right direction, at the center CL in the longitudinal direction of the diaper 1, it is preferable that the length X2 in the left - right direction of the standing portion 15b is shorter than the length X3 from the base end be of the standing portion 15b to the side end 16e of the leg gather portion 16 (X2 < X3). As described above, the standing portion 15b is inside the left - right direction of the adhesion region A1 along the longitudinal direction and inside the longitudinal direction of the adhesion region A2 provided at the longitudinal end. Therefore, the base end be of the standing portion 15b is the end inside the left - right direction of the adhesion region A1 along the longitudinal direction. Thus, when the wearer tries to wear the diaper 1, even if the standing portion 15b of the leak - proof wall portion 15 falls toward the outside in the left - right direction, the length X3 from the base end be of the standing portion 15b to the side end 16e of the leg gather portion 16 is longer than the length X2 in the left - right direction of the standing portion 15b that has fallen toward the outside in the left - right direction. As a result, the possibility that the entire area of the leg gather portion 16 is covered by the leak - proof wall portion 15 is reduced, and at least a part of the side - end region TR of the leg gather portion 16 becomes easier to visually recognize. Therefore, the possibility that the side - end region TR of the leg gather portion 16 is blocked by the leak - proof wall portion 15 can be reduced. The wearer can more easily recognize the position of the leg - opening LH by the color of the side - end region TR, and it becomes easier to put on the diaper 1.

[0095] Furthermore, when the leakage preventing wall portions 15 are provided as described above, it is preferable that the region between the base ends be of the upright portions 15b on both the left and right sides of the leakage preventing wall portions 15 be white when viewed from the skin side, as shown in Fig. 7. In the diaper 1 of this embodiment, the top sheet 12 and the absorbent body 11 are white, so that the region between the base ends be appears white when viewed from the skin side. When viewed from the skin side, the region between the base ends be of the upright portions 15b of the leakage preventing wall portions 15 is a region that can come into contact with the wearer's skin when the upright portions 15b of the leakage preventing wall portions 15 are upright in the worn state, and is also a region that can absorb excrement. Therefore, by coloring the region between the base ends be of the upright portions 15b in the left and right direction white, it becomes easier to check the state of excrement when the diaper 1 is worn. Furthermore, when putting on the diaper 1, the wearer can easily see the bluish (similar) color of the side edge regions TR against the white color of the left-right central portion of the diaper 1 (between the base ends be of the upright portions 15b in the left-right direction), making the color of the side edge regions TR more noticeable. This makes it easier for the wearer to recognize the positions of the leg openings LH, making it easier to put on the diaper 1.

[0096] 8, the region of the pair of waistbands that is outside the leg gathers 16 in the longitudinal direction is defined as a first region R1. That is, the first region R1 is the region above the ventral end of the leg gathers 16 and the region above the dorsal end of the leg gathers 16. The second region R2 is the region inside (on the crotch side) the lower end of the ventral waistband 20 and the dorsal waistband 30 in the longitudinal direction, and between the base ends be of the upright portions 15b of the leakage barrier walls 15 on both the left and right sides. In such a case, when the diaper 1 is viewed from the non-skin side (FIG. 8), it is preferable that 50% or more of the area of ​​each of the first region R1 and the second region R2 is a similar color, and that the blue color (similar color) of the side edge region TR is darker than the blue color (similar color) of the first region R1, and that the blue color of the side edge region TR is darker than the blue color (similar color) of the second region R2. It is also preferable that the blue color of the first region R1 and the blue color of the second region R2 have different color intensities. Examples of the area comparison include a visual confirmation method and a method of calculating and confirming the portions of the same color system in each of the regions R1 and R2 using an area calculation program. Examples of methods for confirming the area ratio of areas of similar colors in each region R1, R2 include visual confirmation and a method of calculating and confirming the areas of similar colors in each region R1, R2 using an area calculation program.

[0097] In the diaper 1 of this embodiment, the skin-side sheets 21, 31 of the ventral waistline portion 20 and the dorsal waistline portion 30 are entirely blue (bluish), so that when the diaper 1 is viewed from the non-skin side, it is visually apparent that the majority (50% or more of the area) of the first region R1 is blue (bluish). In addition, in this embodiment, almost the entire backsheet 13 (50% of the area) has a portion colored blue, and the exterior sheet 14 is white, so that when the diaper 1 is viewed from the non-skin side, the blue (bluish) color of the backsheet 13 is visually apparent through the exterior sheet 14. This makes it easier to create a sense of unity for the entire diaper 1 when viewed from the non-skin side, and also makes it easier for the wearer to focus on the side end region TR, making it easier to recognize the position of the leg openings LH and making it easier to put on the diaper 1. The first region R1 and the second region R2 do not necessarily have to be only the predetermined color or a color similar to the predetermined color. The first region R1 and the second region R2 visible from the non-skin side of the diaper 1 may also have a pattern, design, or lettering in a color different from the predetermined color or a color similar to the predetermined color.

[0098] As described above, the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b of the pair of gathered sheet portions 161 are each preferably a bluish (colored) nonwoven fabric sheet, and a film sheet 163 is preferably provided between the blue skin-side gathered sheet portion 161a and the blue non-skin-side gathered sheet portion 161b. When this film sheet 163 is provided, it is preferable that the side edge 163e of the film sheet 163 is provided laterally inward of the side edge 16e of the leg gathered portion 16, which is the side edge of the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b, on one left-right side of the diaper 1. In other words, when viewed in the thickness direction of the diaper 1, the outer left-right edges (side edge regions TR) of the leg gathered portion 16 are regions where only the gathered sheet portions 161 are overlapped, and where no film sheet 163 is provided. The pair of gathered sheet portions 161 of the diaper 1 of this embodiment are each a blue sheet, and the film sheet 163 is a white sheet.

[0099] Generally, the film sheet 163 is a sheet with higher rigidity than the gathered sheet portions 161a, 161b, which are nonwoven fabric sheets. Therefore, the film sheet 163 provided between the skin-side gathered sheet portion 161a and the non-skin-side gathered sheet portion 161b increases the rigidity of the leg gathered portion 16, making it easier to maintain the leg gathered portion 16 in a flat shape. Maintaining the flatness of the leg gathered portion 16 makes it easier to recognize the predetermined color (blue) of the skin-side sheet 31 of the back-side waistband portion 30 and the similar color (blueish) of the gathered sheet portion 161 when viewed from the non-skin side, thereby creating a unified appearance for the diaper 1. Furthermore, when viewed from the skin side, it makes it easier to recognize the portions of the side edge regions TR of the gathered sheet portion 161 that are similar in color to the predetermined color, making it easier for the wearer to identify the positions of the leg openings LH.

[0100] By providing the side edges 163e of the film sheet 163 inside in the left-right direction of the side edges of the pair of gathered sheet portions 161 (side edges 16e of the leg gathered portions 16), at least the side edges (near the outer edges in the left-right direction) of the side edge regions TR of the leg gathered portions 16 become areas where the film sheet 163 does not overlap. This reduces the risk that the portions where the highly rigid film sheet 163 is provided will come into contact with the wearer's skin and cause discomfort to the wearer's skin. In other words, while improving the feel of the leg gathered portions 16 against the skin around the wearer's legs when worn, it becomes easier to recognize the portions of the side edge regions TR of the gathered sheet portions 161 that are similar in color to the predetermined color, making it easier for the wearer to recognize the positions of the leg openings LH.

[0101] Furthermore, when viewed from the skin side, it is preferable that the color of the region where the pair of gathered sheet portions 161 and the film sheet 163 do not overlap (side edge regions TR) is darker than the color of the region where the pair of gathered sheet portions 161 (skin-side gathered sheet portion 161a and non-skin-side gathered sheet portion 161b) and the film sheet 163 overlap (inner region UR). In the diaper 1 of this embodiment, the film sheet 163 is white, so the color of the side edge regions TR is darker than the color of the inner region UR. This makes it easier for the wearer to notice the outline of the leg openings LH when viewing the diaper 1 from the skin side.

[0102] As shown in FIG. 10A, the value of Equation 1 calculated from the measurements of the skin-side surface of the side edge regions TR of the diaper 1 and its average value (78.8) are smaller than the value of Equation 1 calculated from the measurements of the skin-side surface of the inner region UR and its average value (82.2). The absolute value of the difference between the calculated values ​​of Equation 1 (the difference in average values ​​is 3.4) is clearly greater than 2.0. Therefore, the color intensity of the side edge regions TR and the color intensity of the inner region UR are different. Furthermore, since the value of Equation 1 calculated from the measurements of the inner region UR is smaller than the value of Equation 1 calculated from the measurements of the side edge regions TR, the side edge regions TR of the diaper 1 are darker in color than the inner region UR.

[0103] As shown in FIG. 10B, the value of Equation 1 calculated from the results of measuring the skin-side surface of the side edge regions TR of the diaper 100 and its average value (84.5) are smaller than the value of Equation 1 calculated from the results of measuring the skin-side surface of the inner region UR and its average value (86.8). The absolute value of the difference between the calculated values ​​of Equation 1 (the difference in average values ​​is 2.3) is clearly greater than 2.0. Therefore, the color intensity of the side edge regions TR and the color intensity of the inner region UR are different. Furthermore, since the value of Equation 1 calculated from the results of measuring the inner region UR of the side edge regions TR is smaller than the value of Equation 1 calculated from the results of measuring the side edge regions TR, the color of the diaper 100 is darker in the side edge regions TR than in the inner region UR.

[0104] As described above, similar to the back waist portion 30, the ventral waist portion 20 has a waist stretch member 23 that can stretch in the left-right direction, a skin-side sheet 21 adjacent to the waist stretch member 23 from the skin side, and a non-skin-side sheet 22 adjacent to the waist stretch member 23 from the non-skin side, and the skin-side sheet 21 is a sheet of a predetermined color (blue) throughout. In the back-side waistline portion 30, it is preferable that the color of the skin-side sheet 31 is different from the color of the non-skin-side sheet 32. In the back-side waistline portion 30, the back-side end of the skin-side sheet 31 in the longitudinal direction and the back-side end of the non-skin-side sheet 32 ​​in the longitudinal direction are located at different positions. On the other hand, in the ventral-side waistline portion 20, the ventral end of the skin-side sheet 21 in the longitudinal direction and the ventral end of the non-skin-side sheet 22 are located at the same position in the longitudinal direction.

[0105] 9, when the diaper 1 is viewed from the non-skin side, the color of the skin-side sheet 21 is visible at the upper end of the ventral waist portion 20, whereas the skin-side sheet 21 is not provided at the upper end of the back waist portion 30, and the color of the skin-side sheet 31 is not visible at the upper end of the back waist portion 30. Therefore, in the pants-type state (FIG. 1), the colors of the upper ends of the ventral waist portion 20 and the back waist portion 30 can be made different, making it easier for the wearer to distinguish between the ventral waist portion 20 and the back waist portion 30 and to recognize the front-to-back direction of the diaper 1.

[0106] As in the back-side waistband portion 30 of the diaper 1 of this embodiment, it is preferable that the skin-side sheet 31 and the non-skin-side sheet 32 ​​are different colors, and that the back-side end of the skin-side sheet 31 and the back-side end of the non-skin-side sheet 32 ​​are located at different longitudinal positions. In this case, when the diaper 1 is viewed from the skin side, it is preferable that the similar color (blue) of the side end region TR is darker than the color of the back-side lower end region KRb. It is also preferable that the blue of the back-side lower end region KRb is darker than the blue of the region of the back-side waistband portion 30 where the skin-side sheet 31 and the non-skin-side sheet 32 ​​do not overlap. That is, in the diaper 1, the skin-side sheet 31, which is a blue sheet, does not extend to the upper end (the end on the back side) of the back-side waistline portion 30, and therefore the upper end of the back-side waistline portion 30 is an area where the skin-side sheet 31 and the non-skin-side sheet 32 ​​do not overlap when viewed in the thickness direction. Therefore, in the diaper 1 of this embodiment, the upper end of the back-side waistline portion 30 is white, the color of the non-skin-side sheet 32. As a result, the color of the back-side lower end region KRb of the back-side waistline portion 30 is darker than the color of the upper end, and the color of the side end region TR is darker than the color of the back-side lower end region KRb.

[0107] As a result, when the diaper 1 is viewed in the pants-type state (see Figure 1), the diaper 1 appears to have a darker blue color from the waist opening BH toward the leg openings LH. Therefore, by recognizing that the area that appears darker from front to back is arranged when the diaper 1 is worn, the wearer can intuitively identify the area through which the legs are to be passed (the leg openings LH), making it easier for the wearer to put on the diaper 1.

[0108] Furthermore, in the back-side waistband portion 30, when one of the skin-side sheet 31 or the non-skin-side sheet 32 ​​is a sheet of a predetermined color throughout, it is preferable that the other sheet is a sheet that is not colored throughout. In the back-side waistband portion 30 of this embodiment, the skin-side sheet 31 is a sheet that is entirely blue (a predetermined color), and the non-skin-side sheet 32 ​​is a sheet that is entirely white. Note that "not colored" is synonymous with "not colored."

[0109] As described above, by coloring the back waist portion 30, the back lower end region KRb, and the side end regions TR in a predetermined color or a similar color to the predetermined color, the diaper 1 can be more easily unified overall. Furthermore, by overlapping the blue skin-side sheet 31 and the white non-skin-side sheet 32 ​​in the back waist portion 30, the blue (blue-ish) color of the back waist portion 30 can be softened, thereby making the diaper 1 appear more soft to the wearer. Furthermore, by softening the color of the back lower end region KRb in the back waist portion 30 while making the color of the side end regions TR of the leg gathers 16 appear darker, the wearer's attention can be more easily drawn to the leg openings LH. This softens the impression of the diaper 1 (back waist portion 30) and makes it easier for the wearer to recognize the position of the leg openings LH, making the diaper 1 easier to put on.

[0110] Although the embodiments of the present invention have been described above, the above embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.

[0111] In the diaper 1 of the above-described embodiment, the colored (blue) skin side sheet 31 (21) and the colored (blueish) gathered sheet portion 161 are formed by forming nonwoven fabric fibers of a predetermined color (blue, blueish), respectively, into sheets, but this is not limiting. For example, each of the sheets 31, 21, 161 may be a white sheet colored with ink using inkjet or other means.

[0112] In the diaper 1, each of the sheets 31, 21, 161 may be plain with no pattern or design, or each of the sheets 31, 21, 161 may have any design, pattern, lettering, etc. In that case, the sheets 31, 21, 161 may be a predetermined color or a color different from a similar color to the predetermined color. [Explanation of symbols]

[0113] 1 Diapers (pants-type disposable diapers, pants-type absorbent articles), 10. Absorbent body; 11 absorbent body, 11A absorbent core, 11B core wrap sheet, 12 top sheet, 13 back seat, 14 exterior sheets, 15 Leakage prevention wall section, 151 Leak-proof wall sheet, 152 Leak-proof wall expansion member, 16 Leg gathers, 161 Gathered sheet part, 161a Skin side gathered sheet part, 161b Non-skin side gathered sheet portion, 162 Leg extension members, 163 film sheets, 20 ventral waist portion (waist portion, other side waist portion), 21 skin side sheet (other side skin side sheet), 22 non-skin side sheet (other side non-skin side sheet), 23 waist stretch member (other side waist stretch member), 24 Folded portion, 26 Skin-facing sheet, 30 back waist part (waist part, one side waist part), 31 Skin side sheet, 32 Non-skin side sheet, 33 waist elastic member, 34 Folded portion, 36 Skin-facing sheet, 40 joints, KRf ventral lower end region (lower end region), KRb dorsal lower end region (lower end region), TR side edge area, SR erector tip area, UR inner area

Claims

1. A pair of waistband portions; an absorbent body having a liquid-absorbing absorbent core; The pair of waistbands includes a first waistband and a second waistband that is a separate member from the first waistband, A pants-type absorbent article having a waist opening formed by joining both side ends of the pair of waist sections at a joining section, and a pair of leg openings, In the deployed and extended state, having a longitudinal direction, a left-right direction, and a thickness direction that intersect with one another, The one-side waistband portion is located on one end side in the longitudinal direction, the other-side waistband portion is located on the other end side in the longitudinal direction, one end of the absorbent main body in the longitudinal direction is joined to the one-side waistline portion, and the other end of the absorbent main body in the longitudinal direction is joined to the other-side waistline portion, The absorbent main body has leg gather portions on both sides in the left and right direction, The leg gather portion includes a pair of gathered sheet portions and a leg-around stretchable member provided between the pair of gathered sheet portions, the one-side waist portion has a skin-side sheet adjacent to the waist-line stretchable member stretchable in the left-right direction from the skin-side, and a non-skin-side sheet adjacent to the waist-line stretchable member from the non-skin-side, At least one of the skin side sheet and the non-skin side sheet is a sheet entirely colored in a predetermined color, When viewed from the skin side, on one side in the left-right direction, a region of the lower end of the one-side waistband portion that is along the leg openings and has a predetermined width in the longitudinal direction is defined as a lower end region; When a region of the side edge of the leg gather portion along the leg opening and having the predetermined width in the left-right direction is defined as a side edge region, Viewed from the skin side, the color of the lower end region is similar to the predetermined color, the side edge region includes a portion having a color similar to the predetermined color, The similar color in the lower end region and the similar color in the side end region have different intensities. A pants-type absorbent article characterized by:

2. A pair of waistband portions; an absorbent body having a liquid-absorbing absorbent core; The pair of waistbands includes a first waistband and a second waistband that is a separate member from the first waistband, A pants-type absorbent article having a waist opening formed by joining both side ends of the pair of waist sections at a joining section, and a pair of leg openings, In the deployed and extended state, having a longitudinal direction, a left-right direction, and a thickness direction that intersect with one another, The one-side waistband portion is located on one end side in the longitudinal direction, the other-side waistband portion is located on the other end side in the longitudinal direction, one end of the absorbent main body in the longitudinal direction is joined to the one-side waistline portion, and the other end of the absorbent main body in the longitudinal direction is joined to the other-side waistline portion, The absorbent main body has leg gather portions on both sides in the left and right direction, The leg gather portion includes a pair of gathered sheet portions and a leg-around stretchable member provided between the pair of gathered sheet portions, the one-side waist portion has a skin-side sheet adjacent to the waist-line stretchable member stretchable in the left-right direction from the skin-side, and a non-skin-side sheet adjacent to the waist-line stretchable member from the non-skin-side, At least one of the skin side sheet and the non-skin side sheet is a sheet entirely colored in a predetermined color, When viewed from the skin side, on one side in the left-right direction, a region of the lower end of the one-side waistband portion that is along the leg openings and has a predetermined width in the longitudinal direction is defined as a lower end region; When a region of the side edge of the leg gather portion along the leg opening and having the predetermined width in the left-right direction is defined as a side edge region, Viewed from the skin side, the color of the lower end region is similar to the predetermined color, the side edge region includes a portion having a color similar to the predetermined color, The L of the similar color of the lower end region and the similar color of the side end region ＊ a ＊ b ＊ The color difference in the color system is greater than 6.0 A pants-type absorbent article characterized by:

3. The pants-type absorbent article according to claim 1 or 2, a pair of leak-proof wall portions on both sides in the left-right direction; The leak preventing wall portion includes a leak preventing wall sheet along the longitudinal direction and a leak preventing wall expansion and contraction member that expands and contracts in the longitudinal direction, The leakage preventing wall portion has an upstanding portion that can stand on the skin side and a fixed portion that cannot stand, When a region of the leakage preventing wall portion that overlaps with the side end region in the longitudinal direction and that extends along the longitudinal direction and has the predetermined width in the left-right direction from the tip of the standing portion is defined as a standing portion tip region, A pants-type absorbent article characterized in that, when viewed from the skin side, the similar color of the side edge regions and the color of the tip regions of the standing portions have different saturations.

4. The pants-type absorbent article according to claim 1 or 2, a pair of leak-proof wall portions on both sides in the left-right direction; The leak preventing wall portion includes a leak preventing wall sheet along the longitudinal direction and a leak preventing wall expansion and contraction member that expands and contracts in the longitudinal direction, The leakage preventing wall portion has an upstanding portion that can stand on the skin side and a fixed portion that cannot stand, When a region of the leakage preventing wall portion that overlaps with the side end region in the longitudinal direction and that extends along the longitudinal direction and has the predetermined width in the left-right direction from the tip of the standing portion is defined as a standing portion tip region, A pants-type absorbent article, characterized in that the similar color of the side edge regions is a color different from the color of the tip regions of the standing portions.

5. The pants-type absorbent article according to claim 1 or 2, a pair of leak-proof wall portions on both sides in the left-right direction; The leak preventing wall portion includes a leak preventing wall sheet along the longitudinal direction and a leak preventing wall expansion and contraction member that expands and contracts in the longitudinal direction, The leakage preventing wall portion has an upstanding portion that can stand on the skin side and a fixed portion that cannot stand, A pants-type absorbent article characterized in that, on one side of the left-right direction, at the center of the longitudinal direction of the pants-type absorbent article, the left-right length of the standing portion is shorter than the length from the base end of the standing portion to the side end of the leg gathered portion.

6. The pants-type absorbent article according to claim 1 or 2, The pair of gathered sheet portions are each a colored nonwoven fabric sheet, a film sheet is provided between the pair of gathered sheet portions, A pants-type absorbent article characterized in that, on one side in the left-right direction, the side edge of the film sheet is provided inside in the left-right direction from the side edges of the pair of gathered sheet portions.

7. The pants-type absorbent article according to claim 6, The pants-type absorbent article is characterized in that, when viewed from the skin side, the color of the area where the pair of gathered sheet portions and the film sheet do not overlap is darker than the color of the area where the pair of gathered sheet portions and the film sheet overlap.

8. The pants-type absorbent article according to claim 1 or 2, In the one-side waistband portion, the skin side sheet and the non-skin side sheet have different colors, one end of the skin side sheet in the longitudinal direction and one end of the non-skin side sheet in the longitudinal direction are provided at different positions, the other-side waistline portion has a other-side skin-side sheet adjacent to the other-side waistline stretch member stretchable in the left-right direction from the skin side, and a other-side non-skin-side sheet adjacent to the other-side waistline stretch member from the non-skin side, At least one of the other skin side sheet and the other non-skin side sheet is a sheet whose entire area is a similar color to the predetermined color, A pants-type absorbent article characterized in that the other end of the other skin-side sheet in the longitudinal direction and the other end of the other non-skin-side sheet in the longitudinal direction are located at the same position.

9. The pants-type absorbent article according to claim 1 or 2, In the one-side waistband portion, the skin side sheet and the non-skin side sheet have different colors, one end of the skin side sheet in the longitudinal direction and one end of the non-skin side sheet in the longitudinal direction are provided at different positions, Viewed from the skin side, the similar color in the side edge region is darker than the similar color in the bottom edge region; A pants-type absorbent article characterized in that the similar color of the lower end region is darker than the similar color of the region of the one side waistband where the skin side sheet and the non-skin side sheet do not overlap.

10. The pants-type absorbent article according to claim 1 or 2, A pants-type absorbent article characterized in that one of the skin-side sheets or the non-skin-side sheets of the one side waist portion is a sheet of the specified color throughout, and the other is a sheet that is not colored throughout.

11. The pants-type absorbent article according to claim 1 or 2, a pair of leak-proof wall portions on both sides in the left-right direction; The leak preventing wall portion includes a leak preventing wall sheet along the longitudinal direction and a leak preventing wall expansion and contraction member that expands and contracts in the longitudinal direction, The leakage preventing wall portion has an upstanding portion that can stand on the skin side and a fixed portion that cannot stand, A pants-type absorbent article characterized in that, when viewed from the skin side, the area between the base ends of the standing portions on both sides in the left-right direction is white.

12. The pants-type absorbent article according to claim 1 or 2, a pair of leak-proof wall portions on both sides in the left-right direction; The leak preventing wall portion includes a leak preventing wall sheet along the longitudinal direction and a leak preventing wall expansion and contraction member that expands and contracts in the longitudinal direction, The leakage preventing wall portion has an upstanding portion that can stand on the skin side and a fixed portion that cannot stand, a region of the pair of waistband portions that is outward from the leg gathered portion in the longitudinal direction is defined as a first region; When a region in the longitudinal direction that is inside the lower end of the one-side waistline portion, inside the lower end of the other-side waistline portion, and between the base ends of the standing portions on both sides in the left-right direction is defined as a second region, When viewed from the non-skin side, 50% or more of the area of ​​each of the first region, the second region, and the side edge region is the similar color portion, the similar color of the side edge region is darker than the similar color of the first region; the similar color of the side edge region is darker than the similar color of the second region; A pants-type absorbent article, wherein the similar color of the first region and the similar color of the second region have different intensities.

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