Absorbent article

Abstract

To provide an absorbent article in which it is easy to recognize that the absorbent article is a product suitable for wearing for a long time and which can be used by a user without anxiety.SOLUTION: An absorbent article (1) includes an absorbent core (11) in which an average basis weight of a superabsorbent polymer is equal to or greater than 270 g / m2. The absorbent article includes a first colored region (51) and a second colored region (52) in a case where the diaper (1) in a developed and stretched state is viewed from a non-skin side in a thickness direction, a total area of the first colored region (51) being equal to or greater than 50% of an area of the absorbent article (1). When 2071U, 2072U, 2073U, etc. in a color sample of PANTONE are represented as first color group, the first colored region (51) is a region of a color corresponding to any of the first color group, When 100U, 101U, 102U, etc. in the color sample of PANTONE are represented as a second color group, the second colored region (52) is a region of a color corresponding to any of the second color group.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A known absorbent article includes an absorbent main body and an exterior body disposed on the non-skin-facing side of the absorbent main body. Patent Document 1 discloses an absorbent article having a first colored region in which the back sheet constituting the absorbent main body is colored, and a second colored region in which the sheet constituting the exterior body is colored. Furthermore, a pattern is arranged in a stretchable region within the overlapping region where the first colored region and the second colored region overlap. The highly visible pattern in the overlapping region changes shape depending on the stretch state of the stretchable region, thereby attracting children's interest. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-184653 Summary of the Invention [Problem to be solved by the invention]

[0004] It is more difficult to change absorbent articles frequently at night than during the day. Therefore, by providing an absorbent article that is less likely to leak even when worn for long periods of time, users' concerns about leakage can be alleviated. On the other hand, Patent Document 1 only considers attracting children's interest. Therefore, even if an absorbent article suitable for long periods of wear is provided with a pattern that will attract children's attention, as in Patent Document 1, users cannot immediately distinguish whether it is an absorbent article for long periods of wear or a regular absorbent article (e.g., for daytime use). Therefore, for example, when sleeping, users may feel anxious about whether they are wearing an absorbent article for long periods of wear. As such, there are many issues regarding users' concerns about using absorbent articles for long periods of time.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide an absorbent article that is easy for users to recognize as a product suitable for long-term wear and that they can use with confidence. [Means for solving the problem]

[0006] The main invention to achieve the above object is: In the unfolded state, the device has a longitudinal direction, a left-right direction, and a thickness direction which are perpendicular to each other, an absorbent core comprising a superabsorbent polymer; The average basis weight of the superabsorbent polymer is 270 g / m 2 The absorbent article is as described above, When the absorbent article in the expanded and stretched state is viewed from the non-skin side in the thickness direction, A first colored region and a second colored region are included. the total area of ​​the first colored regions is 50% or more of the area of ​​the absorbent article; PANTONE (registered trademark) color swatches include 2071U, 2072U, 2073U, 2086U, 2092U, 2093U, 2099U, 2100U, 2133U, 2114U, 2562U, 2563U, 2572U, 2673U, 2582U, 2635U, 2645U, 2705U, 2715U, 2716U, and 256U. When 257U, 270U, ​​271U, 520U, 521U, 522U, 527U, 528U, 529U, 530U, 531U, 3575U, 3543U, 7437U, 7438U, 7439U, 7440U, 7444U, 7445U, 7451U, 7452U, 7453U, 7696U, and 7697U are the first color group, the first colored region is a region of a color that corresponds to one of the first color group, In PANTONE color swatches, 100U, 101U, 102U, 106U, 107U, 108U, 113U, 114U, 115U, 120U, 121U, 122U, 123U, 134U, 135U, 136U, 137U, 143U, 144U, 141U, 142U, 1205U, 1215U, 1225U, 1235U, 148U, 149U, 150U, 151U, 155U, 156U, 157U, 162U, 163U, 164U, 1 65U, 712U, 713U, 714U, 715U, 1485U, 1495U, 1505U, Orange021U, 1355U, 1365U, 1375U, 1555U, 1565U, 1575U, 171U, 172U , 489U, 488U, 487U, 1625U, 1635U, 1645U, 1655U, 1665U, 2001U, 2002U, 2033U, 2004U, 2008U, 2009U, 2010U, 2011U, 2012U , 2013U, 2022U, 2023U, 2024U, 2025U, 2026U, 1585U, 2016U, 2017U, 2018U, 3588U, 3564U, 4008U, 4009U, 4031U, 4032U, 4 033U, 4066U, 4067U, 4068U, 7409U, 7410U, 7411U, 7412U, 7413U, 7415U, 7416U, 7417U, 7548U, 7549U, 379U, 380U, 386U, When 387U, 388U, 393U, 394U, 395U, 459U, 460U, 461U, 473U, 474U, 475U, 584U, 585U, 586U, 587U, 600U, 601U, 602U, 603U, 607U, 608U, 609U, 610U, 719U, 720U, 721U, 3935U, 3955U, 3965U, 7506U, 7507U, 7508U, 7499U, 7500U, and 7501U are in the second color group, The absorbent article is characterized in that the second colored region is a region of a color that falls within the second color group. Other features of the present invention will become apparent from the description of this specification and the accompanying drawings. [Effects of the Invention]

[0007] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide an absorbent article that is easy for users to recognize as a product suitable for long-term wear and that they can use with confidence. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic front view of a diaper 1. FIG. [Figure 2] 1 is a schematic plan view of a diaper 1 in an unfolded and stretched state, as viewed from the skin side. [Figure 3] FIG. 3 is a schematic cross-sectional view taken along line AA in FIG. 2. [Figure 4] 1 is a schematic cross-sectional view of an absorbent body 10. FIG. [Figure 5] 1 is a schematic plan view of a diaper 1 in an unfolded and stretched state, as viewed from the non-skin side. [Figure 6] 1 is a schematic plan view of the absorbent body 10 as seen from the non-skin side. [Figure 7] 7A to 7C are explanatory diagrams of a diaper 1 according to a modification. [Figure 8] FIG. 10 is an explanatory diagram of a crotch portion 1B of a diaper 1 according to a modified example. 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 is a diaper bag having an absorbent core that, in a developed state, has a longitudinal direction, a left-right direction, and a thickness direction that are perpendicular to one another and contains a superabsorbent polymer, and the average basis weight of the superabsorbent polymer is 270 g / m 2and a second colored region, the first colored region having a total area of ​​50% or more of the area of ​​the absorbent article when the absorbent article in a spread and stretched state is viewed from the non-skin side in the thickness direction, and the first colored region has a color that is not one of 2071U, 2072U, 2073U, 2086U, 2092U, 2093U, 2099U, 2100U, 2133U, 2114U, 2562U, 2563U, 2572U, 2673U, 2582U, 2635U, 2645U, 2705U, 2715U, 2716U, 256 When U, 257U, 270U, ​​271U, 520U, 521U, 522U, 527U, 528U, 529U, 530U, 531U, 3575U, 3543U, 7437U, 7438U, 7439U, 7440U, 7444U, 7445U, 7451U, 7452U, 7453U, 7696U, and 7697U are defined as a first color group, the first colored area is an area of ​​a color corresponding to any one of the first color groups, and is a color corresponding to any one of 100U, 101U, 102U, 106U, 107U, 108U, 113U, 114U, 115U, 120U, 126U, 127U, 128U, 129U, 130U, 131U, 132U, 133U, 134U, 135U, 136U, 137U, 138U, 139U, 140U, 141U, 142U, 143U, 144U, 145U, 146U, 147U, 148U, 149U, 150U, 151U, 152U, 153U, 154U, 155U, 156U, 157U, 158U, 159U, 160U, 161U, 162U, 163U, 164U, 165U, 166U, 167U, 1U, 122U, 123U, 134U, 135U, 136U, 137U, 143U, 144U, 141U, 142U, 1205U, 121 5U, 1225U, 1235U, 148U, 149U, 150U, 151U, 155U, 156U, 157U, 162U, 163U, 164 U, 165U, 712U, 713U, 714U, 715U, 1485U, 1495U, 1505U, Orange021U, 1355U, 1365U, 1375U, 1555U, 1565U, 1575U, 171U, 172U, 489U, 488U, 487U, 1625U, 16 35U, 1645U, 1655U, 1665U, 2001U, 2002U, 2033U, 2004U, 2008U, 2009U, 2010 U, 2011U, 2012U, 2013U, 2022U, 2023U, 2024U, 2025U, 2026U, 1585U, 2016U, 2 017U, 2018U, 3588U, 3564U, 4008U, 4009U, 4031U, 4032U, 4033U, 4066U, 406 7U, 4068U, 7409U, 7410U, 7411U, 7412U, 7413U, 7415U, 7416U, 7417U, 7548U,When 7549U, 379U, 380U, 386U, 387U, 388U, 393U, 394U, 395U, 459U, 460U, 461U, 473U, 474U, 475U, 584U, 585U, 586U, 587U, 600U, 601U, 602U, 603U, 607U, 608U, 609U, 610U, 719U, 720U, 721U, 3935U, 3955U, 3965U, 7506U, 7507U, 7508U, 7499U, 7500U, and 7501U are defined as a second color group, the second colored region is an absorbent article characterized in that the second colored region is a region of a color corresponding to any one of the second color groups.

[0010] According to the first aspect, the first colored region is more likely to catch the user's eye than when the total area of ​​the first colored region is less than 50% of the area of ​​the absorbent article, making it easier for the user to recognize that the absorbent article is a product suitable for long-term wear. Furthermore, the first colored region can calm the user's sense of calm when they see it, and the yellow color (the color of urine) that is complementary to the first colored region remains as an afterimage, giving the user the impression of good absorbency, and the yellow color (the color of urine) that is complementary to the first colored region gives the user the impression of good blood circulation in the wearer's skin. Meanwhile, the second colored region allows the user to feel warmth from the absorbent article, preventing the user from becoming anxious about whether the wearer's body temperature has dropped too low. Therefore, the user can use the absorbent article with peace of mind.

[0011] (Aspect 2) The absorbent article according to aspect 1, The garment has a pair of waistband portions and a crotch portion, and at least one of the pair of waistband portions has an elastic member, a skin-side sheet located closer to the skin than the elastic member, and a non-skin-side sheet located closer to the skin than the elastic member, and the first colored area is formed by coloring one of the skin-side sheets.

[0012] According to the second aspect, the effect of the first colored region is obtained. In particular, the color of the skin-side sheet is likely to catch the user's eye when the absorbent article is viewed from the skin side. Therefore, yellow, which is a complementary color to the color of the skin-side sheet, is likely to remain as an afterimage, making the user more likely to perceive the color of urine on the absorbent body. Furthermore, the proximity of the skin-side sheet and the absorbent body makes the color of urine more vivid to the user. This gives the user the impression of good absorbency, allowing the user to use the absorbent article with peace of mind.

[0013] (Aspect 3) The absorbent article according to aspect 1 or 2, The garment has a pair of waistband portions and a crotch portion, and at least one of the pair of waistband portions has an elastic member, a skin-side sheet located closer to the skin than the elastic member, and a non-skin-side sheet located closer to the skin than the elastic member, and the first colored area is formed by coloring one of the non-skin-side sheets.

[0014] According to the third aspect, the effects of the first colored region are obtained. In particular, the color of the non-skin-side sheet is easily noticed by the user when viewing the absorbent article from the non-skin side. This makes it easier for the user to recognize that the absorbent article is suitable for long-term wear, calms the user, and gives the impression of good blood circulation in the wearer's skin, which is a complementary color to the first colored region. This allows the user to use the absorbent article with peace of mind.

[0015] (Aspect 4) An absorbent article according to any one of aspects 1 to 3, The absorbent article has a top sheet located closer to the skin than the absorbent core, and an outer layer sheet located closer to the non-skin side than the absorbent core, and a portion of the outer layer sheet is folded onto the skin side of the top sheet to form a leak-proof wall portion that can stand up on the skin side, and the first colored area is formed by coloring the outer layer sheet.

[0016] According to the fourth aspect, the color of the outer layer sheet is visible when the absorbent article is viewed from both the non-skin side and the skin side, achieving the effect of the first colored region. In particular, because the outer layer sheet constituting the leakage prevention wall portion is located on the absorbent main body, the complementary color yellow is likely to remain as an afterimage, and the color of urine is clearly visible. This gives the user the impression of good absorbency, allowing them to use the absorbent article with peace of mind.

[0017] (Aspect 5) An absorbent article according to any one of aspects 1 to 4, The absorbent article has a pair of waistbands and a crotch portion, and when viewed from the non-skin side in the thickness direction while in an expanded and stretched state, the total area of ​​the first colored regions in the crotch portion is larger than the total area of ​​the second colored regions in the crotch portion.

[0018] According to aspect 5, since the area ratio of the first colored region is large in the crotch portion that is sandwiched between the legs of the wearer, the skin color of the wearer's legs, which is complementary to the color of the first colored region, is visually recognized vividly, giving the user the impression that blood circulation around the legs is good, allowing the user to use the absorbent article with peace of mind.

[0019] (Aspect 6) An absorbent article according to any one of aspects 1 to 4, The absorbent article has a pair of waistbands and a crotch portion, and when viewed from the non-skin side in the thickness direction while in an expanded and stretched state, the total area of ​​the second colored regions in the crotch portion is greater than or equal to the total area of ​​the first colored regions in the crotch portion.

[0020] According to aspect 6, the user feels that the crotch area of ​​the absorbent article is warm, which prevents the user from feeling anxious that the wearer's body temperature is dropping due to the crotch area getting cold from the large amount of excrement absorbed when the absorbent article is worn for a long period of time, allowing the user to use the absorbent article with peace of mind.

[0021] (Aspect 7) An absorbent article according to any one of aspects 1 to 6, The absorbent garment comprises a ventral outer member, a dorsal outer member formed as a separate member from the ventral outer member, and an absorbent main body having the absorbent core, wherein in an expanded and stretched state, the absorbent main body has an overlapping region that overlaps with at least one of the ventral outer member and the dorsal outer member in the thickness direction, and the total area of ​​the region on the non-skin side of the overlapping region that is the same color as the elastic member of one of the members is 50% or more of the area of ​​the overlapping region.

[0022] According to the seventh aspect, the elastic members in the overlapping region are less noticeable, and the user is more likely to focus on the parts of the overlapping region other than the elastic members (for example, the first colored region), which makes it easier to obtain the desired effect. In addition, the appearance of the absorbent article can be improved.

[0023] (Embodiment 8) An absorbent article according to any one of embodiments 1 to 7, The absorbent article has a pair of waistbands and a crotch portion, and has an absorbent main body equipped with the absorbent core, and when the absorbent article is in an expanded and stretched state and viewed from the non-skin side in the thickness direction, the first colored region and the second colored region are provided in a central region when the absorbent main body in the crotch portion is divided into three equal parts in the left-right direction.

[0024] According to aspect 8, the central region is less likely to collapse even while the absorbent article is being worn, and the user can visually recognize the first colored region and the second colored region. Therefore, even while the absorbent article is being worn, the effect of the first colored region (which makes it easy to recognize that the product is suitable for long-term wear and visually alleviates concerns about health when used for long periods of time) and the effect of the second colored region (which visually alleviates concerns about a drop in the wearer's body temperature) can be obtained.

[0025] (Aspect 9) The absorbent article of aspect 8, When the absorbent article in a spread and stretched state is viewed from the non-skin side in the thickness direction, the total area of ​​the first colored areas in the central region is 50% or more of the area of ​​the central region.

[0026] According to the ninth aspect, the first colored region is easily noticeable by the user while wearing the absorbent article, and the effect of the first colored region is more pronounced.

[0027] (Aspect 10) An absorbent article according to any one of aspects 1 to 9, an absorbent article comprising: a ventral outer member; a dorsal outer member formed as a separate member from the ventral outer member; and an absorbent main body comprising the absorbent core, wherein the ventral outer member and the dorsal outer member are joined to each other at both ends in the left-right direction by a pair of side joints, the dorsal outer member has an extension portion that extends further toward the crotch than the side joints, and when the absorbent article in an expanded and stretched state is viewed from the non-skin side in the thickness direction, the total area of ​​the first colored regions in the region of the absorbent article where the extension portion is located is 50% or more of the area of ​​the region.

[0028] According to aspect 10, the extension portion increases the coverage area of ​​the wearer, reducing concerns about leakage when worn for long periods of time. Furthermore, the first colored region catches the user's eye, providing the desired effect. In particular, the extension portion on the back covers the buttocks, making the skin color of the wearer's groin, which is complementary to the color of the first colored region, more visible, giving the user the impression of good circulation. This allows the user to use the absorbent article with peace of mind.

[0029] ===This embodiment=== <<Basic components of pants-type disposable diapers>> As an example of an absorbent article according to this embodiment, a pants-type disposable diaper 1 for infants (hereinafter also referred to as "diaper 1") will be described. However, the absorbent article according to the present invention is not limited to pants-type disposable diapers, and can also be applied to tape-type disposable diapers, absorbent articles in which one or more locations around the waist can be separated and reattached, i.e., absorbent articles that combine pants and tape types. Furthermore, the intended wearer of the absorbent article is not limited to infants, but may also be an adult or a living organism such as an animal.

[0030] FIG. 1 is a schematic front view of a diaper 1. FIG. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state, as viewed from the skin side. FIG. 3 is a schematic cross-sectional view taken along the line AA in FIG. 2. FIG. 4 is a schematic cross-sectional view of the absorbent main body 10. The "unfolded state" refers to the state in which the diaper 1 is opened in the longitudinal direction of the absorbent core 11 and laid out flat. In the case of a pants-type diaper 1 as in this embodiment, the side seams SS on both sides of the diaper 1 in the lateral direction are unsewn, and the diaper 1 is laid out flat. The "stretched state" refers to the state in which the diaper 1 is stretched without wrinkles, specifically, the state in which the dimensions of each component constituting the diaper 1 (e.g., the outer layer sheet 14 and the skin-side sheets 21, 31, etc.) are stretched to the same length as or close to the dimensions of the component alone.

[0031] The diaper 1 (Fig. 1) in the pants-type state has three mutually perpendicular directions: vertical, horizontal, and front-to-back, and has a waist opening BH and a pair of leg openings LH. In the vertical direction, the side of the waist opening BH is also referred to as the upper side, and the side facing the wearer's crotch is also referred to as the lower side. In the front-to-back direction, the side that contacts the wearer's stomach is also referred to as the front side, and the back side is also referred to as the rear side. Furthermore, the diaper 1 has a thickness direction in which materials are layered, as shown in Fig. 3, and the side that contacts the wearer in the thickness direction is referred to as the skin side, and the opposite side is referred to as the non-skin side.

[0032] The diaper 1 comprises an absorbent main body 10 having an absorbent core 11, and outer members 20, 30 arranged closer to the wearer's skin than the absorbent main body 10. The outer member positioned on the wearer's ventral side is also referred to as the ventral-side outer member 20, and the outer member positioned on the wearer's dorsal side is also referred to as the dorsal-side outer member 30. The diaper 1 in its unfolded state has a longitudinal direction, a left-right direction, and a thickness direction, which are perpendicular to one another. The longitudinal direction corresponds to the longitudinal direction of the absorbent main body 10 and the up-down direction of the pants-type diaper 1. The unfolded diaper 1 is folded in half at a center position CL in the longitudinal direction, and the ventral-side outer member 20 and the dorsal-side outer member 30 are joined to each other at a pair of side joining sections SS at both ends in the left-right direction, thereby forming a pants-type diaper. The side joining sections SS can be joined by welding or adhesive, for example.

[0033] As shown in FIGS. 3 and 4 , the absorbent body 10 includes an absorbent core 11, a liquid-permeable top sheet 12 positioned closer to the skin than the absorbent core 11, a liquid-impermeable back sheet 13 positioned closer to the skin than the absorbent core 11, and an outer sheet 14. The absorbent core 11 absorbs and retains excrement and contains a superabsorbent polymer. Examples of the absorbent core 11 include a liquid-absorbent fiber such as pulp fiber impregnated with a superabsorbent polymer and molded into a predetermined shape, and an SAP sheet formed by attaching an SAP layer to a hydrophilic sheet. Any superabsorbent polymer known in the art can be used without particular limitation, including polyacrylate-based, polysulfonate-based, and maleic anhydride-based superabsorbent polymers. The absorbent core 11 may also be covered with a liquid-permeable core wrap sheet 15 such as tissue paper or nonwoven fabric.

[0034] A pair of longitudinally extending leakage barrier walls 2 are provided on both lateral sides of the absorbent body 10. As shown in Fig. 4, portions of the outer layer sheet 14 extending from both lateral sides of the back sheet 13 while covering the non-skin side of the back sheet 13 are folded at multiple locations to form the leakage barrier walls 2 on both lateral sides of the skin side of the top sheet 12. The elasticity of the leakage barrier elastic members 16 allows the leakage barrier walls 2 to stand up toward the wearer's skin. Leg-hole elastic members 17 are provided laterally outboard of the leakage barrier walls 2, extending longitudinally. The elasticity of the leg-hole elastic members 17 allows the diaper 1 to fit around the wearer's legs.

[0035] The ventral-side outer member 20 and the dorsal-side outer member 30 each include waist-line elastic members 23, 33 (elastic members), skin-side sheets 21, 31 arranged closer to the skin than the waist-line elastic members 23, 33, and non-skin-side sheets 22, 32 arranged closer to the skin than the waist-line elastic members 23, 33. The skin-side sheets 21, 31 and the non-skin-side sheets 22, 32 can be flexible sheet members such as nonwoven fabric. A plurality of waist-line elastic members 23, 33 (thread-like elastic members) are arranged vertically between the skin-side sheets 21, 31 and the non-skin-side sheets 22, 32 and are attached in a stretched state in the left-right direction. The waist-line elastic members 23, 33 (elastic members) are not limited to thread-like elastic members and may also be sheet-like elastic members (such as stretchable films or stretchable nonwoven fabrics). A cover sheet 24, 34 may be provided to cover the upper end of the absorbent main body 10 from the skin side. The cover sheets 24, 34 can prevent the absorbent body 10 from opening or the like.

[0036] The basic configuration of the diaper 1 has been described above, but the above configuration of the diaper 1 is merely an example and is not intended to be limiting. For example, in the diaper 1 of this embodiment, the ventral outer member 20 and the dorsal outer member 30 are formed as separate members, and the non-skin side of the absorbent main body 10 is exposed in the crotch region. However, the present invention is not limited to this. For example, the diaper 1 may have an outer member in the crotch region connecting the ventral outer member 20 and the dorsal outer member 30, or may have an outer member formed as a single continuous member extending from the ventral outer member 20 to the dorsal outer member 30.

[0037] <<About the colored area>> Fig. 5 is a schematic plan view of the diaper 1 in an unfolded and stretched state, as seen from the non-skin side. Fig. 6 is a schematic plan view of the absorbent main body 10, as seen from the non-skin side. In Fig. 6, the positions of the exterior members 20, 30 relative to the absorbent main body 10 are indicated by dotted lines.

[0038] In the diaper 1, the average basis weight of the superabsorbent polymer contained in the absorbent core 11 is 270 g / m 2 Therefore, the average basis weight of the superabsorbent polymer is 270 g / m 2Compared to when the absorbent core 11 is less than 1 / 2 mm, the absorbent core 11 can absorb a larger amount of liquid, and leakage of excrement from the diaper 1 can be suppressed even when a large amount of excrement (urine, etc.) is excreted. Therefore, even when the diaper is worn for long periods of time, such as at night or while sleeping when frequent changes are not possible, and excrement is excreted multiple times, excrement is less likely to leak. In other words, the diaper 1 is a product suitable for long-term wear (for example, a product for nighttime use). This reduces the user's (parents' or wearers') concerns about leakage, and the user can wear the diaper 1 with peace of mind, even when sleeping.

[0039] Preferably, the average basis weight of the superabsorbent polymer is 300 g / m 2 It is preferable that the basis weight (g / m) of the superabsorbent polymer is equal to or more than 100g, which can further suppress leakage. 2 ) can be measured by a known method. For example, the total weight (g) of the superabsorbent polymer physically removed from the absorbent core 11 and the planar area (m 2 ) can be found from

[0040] When the diaper 1 in a flattened and stretched state is viewed from the non-skin side in the thickness direction as shown in Fig. 5, the diaper 1 has a first colored region 51 and a second colored region 52. In Fig. 5, the first colored region 51 is represented by a region filled with dots and black, and the second colored region 52 is represented by a region filled with sand. In the following description, the first colored region 51 and the second colored region 52 are collectively referred to as colored regions 51, 52.

[0041] The "first colored area 51" is an area of ​​colors that fall into a first color group. The first color group is a group of purple and blue colors, and is a group of colors that correspond to the following numbers in the PANTONE (registered trademark) color chart.

[0042] The "second colored area 52" is an area of ​​colors that fall into a second color group. The second color group is a group of yellow and orange colors, and is a group of colors that correspond to the following numbers in the PANTONE color chart:

[0043] PANTONE color swatches: 2071U, 2072U, 2073U, 2086U, 2092U, 2093U, 2099U, 2100U, 2133U, 2114U, 2562U, 2563U, 2572U, 2673U, 2582U, 2635U, 2645U, 2705U, 2715U, 2716U, 256U, 25 The first color group is 7U, 270U, ​​271U, 520U, 521U, 522U, 527U, 528U, 529U, 530U, 531U, 3575U, 3543U, 7437U, 7438U, 7439U, 7440U, 7444U, 7445U, 7451U, 7452U, 7453U, 7696U, and 7697U.

[0044] PANTONE color swatches: 100U, 101U, 102U, 106U, 107U, 108U, 113U, 114U, 115U, 120U, 121U, 122U, 123U, 134U, 135U, 136U, 137U, 143U, 144U, 141U, 142U, 1205U, 1215U, 1225U, 1235U, 148U, 149U, 150U, 151U, 155U, 156U, 157U, 162U, 163U, 164U, 1 65U, 712U, 713U, 714U, 715U, 1485U, 1495U, 1505U, Orange021U, 1355U, 1365U, 1375U, 1555U, 1565U, 1575U, 171U, 172U , 489U, 488U, 487U, 1625U, 1635U, 1645U, 1655U, 1665U, 2001U, 2002U, 2033U, 2004U, 2008U, 2009U, 2010U, 2011U, 2012 U, 2013U, 2022U, 2023U, 2024U, 2025U, 2026U, 1585U, 2016U, 2017U, 2018U, 3588U, 3564U, 4008U, 4009U, 4031U, 4032U, 4033U, 4066U, 4067U, 4068U, 7409U, 7410U, 7411U, 7412U, 7413U, 7415U, 7416U, 7417U, 7548U, 7549U, 379U, 380U, 386U , 387U, 388U, 393U, 394U, 395U, 459U, 460U, 461U, 473U, 474U, 475U, 584U, 585U, 586U, 587U, 600U, 601U, 602U, 603U, 607U, 608U, 609U, 610U, 719U, 720U, 721U, 3935U, 3955U, 3965U, 7506U, 7507U, 7508U, 7499U, 7500U, and 7501U are the second color group.

[0045] The diaper 1 may have a third colored region 53, an uncolored region 54, or no third colored region 53 or uncolored region 54. The third colored region 53 is a region of a color that does not fall into either the first color group or the second color group when the diaper 1 in an expanded and stretched state is viewed from the non-skin side in the thickness direction. The uncolored region 54 is a region that is not colored (a region of the color of the material itself, for example, white).

[0046] Specifically, in the diaper 1 of this embodiment, the skin side sheets 21, 31 constituting the exterior members 20, 30 and the back sheet 13 constituting the absorbent body 10 are colored to form a first colored region 51. In addition, the back sheet 13 is colored to form a second colored region 52.

[0047] The first colored region 51 may be composed of only a region corresponding to one color number in the first color group (the entire first colored region 51 may be the same color), or may be a combination of multiple regions corresponding to multiple color numbers in the first color group. Similarly, the second colored region 52 may be composed of only a region corresponding to one color number in the second color group, or may be a combination of multiple regions corresponding to multiple color numbers in the second color group.

[0048] In this embodiment, when the diaper 1 in an expanded and stretched state is viewed from the non-skin side in the thickness direction (FIG. 5), the total area of ​​the first colored regions 51 is 50% or more of the area of ​​the diaper 1 (whole).

[0049] This makes the first colored regions 51 more noticeable to the user than when the total area of ​​the first colored regions 51 is less than 50% of the area of ​​the diaper 1. The first color group (purple and blue colors) is a group of colors that are associated with night. Therefore, a user who focuses on the first colored regions 51 can easily visually recognize that the diaper 1 is a nighttime product (a product suitable for long-term wear). This prevents the user from accidentally putting on the diaper 1 of this embodiment instead of a regular diaper (e.g., daytime diaper). Furthermore, in a dark bedroom, for example, it is easy to check through gaps in the child's clothing whether the child is wearing the diaper 1 of this embodiment, giving the user a sense of security.

[0050] Additionally, the first color group (purple and blue colors) is considered to be calming colors in color psychology. Therefore, the first colored region 51, which has a large area ratio, can calm the wearer (child) and their family (parents, siblings, etc.). By allowing the child to prepare for bed in a calm state of mind, they can fall asleep smoothly and sleep soundly. This can also ease parents' concerns about nighttime excrement leakage.

[0051] Furthermore, the first color group (purple and blue colors) is roughly complementary to the color of urine (yellow colors). Complementary colors are a combination of colors that are opposite each other on the color wheel. It is known that when a user looks at one complementary color and then shifts their gaze to a white area, the other complementary color appears as an afterimage. When removing the diaper 1, the user, for example, tears the side seam SS, unfolds the diaper 1 in the longitudinal direction, and views the skin-side surface of the absorbent body 10. Even in this case, the user's eyes, which are looking at the first colored region 51 with a large surface area, retain an afterimage of the yellow color, which is complementary to the first colored region 51, and it appears on the skin-side surface of the absorbent body 10. This makes the user more sensitive to the color of urine and realizes that a large amount of urine is being absorbed. This gives the user the impression that the diaper 1 has good absorbency and will not leak even when worn for long periods of time, allowing the user to use the diaper 1 with confidence.

[0052] Furthermore, users (parents, etc.) may be concerned about their child wearing the diaper 1 for long periods of time. For example, they may be concerned about physical problems caused by tightness or stuffiness. When complementary colors are close to each other, the complementary colors are perceived more vividly. Therefore, if the wearer's skin color is complementary to the first colored region 51 (e.g., yellowish skin), the wearer's skin color, viewed together with the first colored region 51, which has a large area ratio, is perceived more vividly, giving the user the impression of good blood circulation. This allows the user to be sure that there will be no health problems if the child wears the diaper 1 for long periods of time, and allows the diaper 1 to be used with peace of mind.

[0053] However, the first color group is a cool color group. If the diaper only had the first colored region 51, the diaper would give the impression of being a cool product, and the wearer's body temperature would also be low. In contrast, the diaper 1 of this embodiment has the second colored region 52. The second color group (yellow and orange colors) is a warm color group. This allows the user to feel warmth from the diaper 1, preventing the user from worrying that the child wearing the diaper 1 has dropped too low. This allows the user to be sure that the child's body temperature is maintained and there are no health problems even if the diaper 1 is worn for a long period of time, and allows the diaper 1 to be used with peace of mind.

[0054] As described above, the diaper 1 of this embodiment makes it easy to recognize that it is a product suitable for long-term wear, visually dispels concerns about leakage and health issues when used for long periods of time, and allows users to use it with peace of mind.

[0055] The first colored region 51 and the second colored region 52 of the diaper 1 can be identified by the following method. First, the target diaper 1 is fixed on a test table in an unfolded and stretched state with the non-skin side facing up. The test table is white. The environment is a brightly lit room (approximately 500-750 lx) with daylight white light (approximate color temperature: 4600-5400 K (Kelvin)). Multiple subjects (e.g., 10 subjects) check the target diaper 1 from a distance of approximately 30-50 cm. The subjects compare each different colored region on the non-skin side of the diaper 1 with a PANTONE color sample and determine which color (color number) in the color sample corresponds (which color is the closest). For example, each of the multiple subjects visually checks the color of a certain colored region and determines which color in the color sample corresponds (which color is the closest). The color number selected by the most people is then identified as the color of that colored region. If the color number of the colored area is included in the first color group, the area is identified as a first colored area 51. If the color number of the colored area is included in the second color group, the area is identified as a second colored area 52. Each colored area on the non-skin side of the diaper 1 is then identified as either a first colored area 51, a second colored area 52, or something else (a third colored area 53).

[0056] Whether the total area of ​​the first colored regions 51 is 50% or more of the area of ​​the diaper 1 can be determined by well-known methods. For example, this may be determined visually. Alternatively, this may be determined by calculating the total area of ​​the first colored regions 51 and the area of ​​the diaper 1 using general image analysis software or area calculation software based on image data obtained by photographing the non-skin side of the diaper 1 in an expanded and stretched state. The same can be done to determine the area comparison described below.

[0057] The method for forming the first colored region 51 and the second colored region 52 is not particularly limited. For example, they may be formed by printing on the material constituting the diaper 1. In this case, it is easy to provide the diaper 1 with a design, lettering, pattern, or the like. Alternatively, a colored material may be formed by incorporating a colorant (pigment, dye, etc.) known in the art into the constituent components of the material. For example, a colored nonwoven fabric may be formed by kneading a colorant into the fibers of the nonwoven fabric. In this case, it is possible to form a colored region over a wide area or with a uniform density.

[0058] Specifically, in the diaper 1 of this embodiment, printing is applied to the back sheet 13 of the absorbent main body 10. The printing is visible through the outer sheet 14 and the exterior members 20, 30, and forms a first colored region 51 and a second colored region 52. For example, in Fig. 5, in an area of ​​the absorbent main body 10 that does not overlap with the exterior members 20, 30, a plurality of first colored regions 511, 512 corresponding to different color numbers are formed by printing, and a second colored region 52 corresponding to a certain color number is also formed by printing.

[0059] In the diaper 1 of this embodiment, the skin-side sheets 21, 31 of the exterior members 20, 30 are made of nonwoven fabrics formed from fibers with a colorant kneaded into them. The color of the skin-side sheets 21, 31 is visible through the non-skin-side sheets 22, 32, forming a first colored region 51 corresponding to a certain color number. Therefore, most of the area in which the skin-side sheets 21, 31 are arranged in the diaper 1 corresponds to the first colored region 51. However, areas where the color of the skin-side sheets 21, 31 overlaps with the printing on the absorbent body 10 and therefore does not appear to be a color corresponding to the first color group do not correspond to the first colored region 51 but correspond to the third colored region 53. Furthermore, areas where the color of the skin-side sheets 21, 31 overlaps with the printing on the absorbent body 10 and therefore does appear to be a color corresponding to the second color group correspond to the second colored region 52.

[0060] The first colored region 51 and the second colored region 52 may be colored regions, or may be colored with designs, patterns, letters, symbols, etc. For example, the diaper 1 in Fig. 5 has a first colored region 511 in which the region along the contour of the absorbent core 11 (the region where the left and right side edges curve inward in the width direction) is colored. In addition, first colored regions 512, 514 in which star designs are colored, and a second colored region 52 in which cat and moon designs are colored are also provided. However, the above colored regions 51, 52 are merely examples, and the shape, number, arrangement, size, etc. of the colored regions 51, 52 are not particularly limited.

[0061] Preferably, the diaper 1 is provided with a design that evokes nighttime or sleeping. For example, the diaper 1 in Fig. 5 is provided with designs of stars and the moon, and sleeping animals. Other examples of designs that evoke nighttime or sleeping include designs of characters sleeping in bed, or characters brushing their teeth. Seeing these designs makes it easier for users to recognize that the diaper 1 is a nighttime product (a product suitable for long-term wear).

[0062] In this specification, the regions of the diaper 1 in the expanded and stretched state that overlap the side seam SS in the vertical direction are referred to as a pair of waist-lined sections 1A, 1C. The one of the pair of waist-lined sections located on the ventral side (front side) is also referred to as a ventral waist-lined section 1A, and the one located on the dorsal side (rear side) is also referred to as a dorsal waist-lined section 1C. The region between the pair of waist-lined sections 1A, 1C is referred to as a crotch section 1B.

[0063] In the case of an absorbent article (for example, a tape-type disposable diaper) that does not have a side joint portion SS, the following applies: When the absorbent article in an expanded and stretched state is divided into four equal parts in the longitudinal direction, the two central regions are defined as the crotch portion. The regions on the outer sides of the crotch portion in the longitudinal direction are defined as a pair of waistband portions.

[0064] As in the present embodiment, the first colored region 51 may be formed by coloring the skin-side sheet 21, 31 located closer to the skin than the waistline elastic members 23, 33 in at least one of the pair of waistband portions 1A, 1C. It is sufficient that at least a portion of the first colored region 51 is formed by coloring the skin-side sheet 21, 31, and in the present embodiment, only a portion of the first colored region 51 is formed. To achieve this, the skin-side sheet 21, 31 may be colored in a first color group (purple and blue colors) or a color similar thereto. The first colored region 51 may be formed by coloring only the skin-side sheet 21, 31, or may be formed together with coloring a material overlapping the skin-side sheet 21, 31 in the thickness direction. In the present embodiment, both the ventral and dorsal skin-side sheets 21, 31 are entirely colored. However, only one of the ventral and dorsal skin-side sheets 21, 31 may be colored, or only a portion of the skin-side sheet 21, 31 may be colored. Furthermore, in this embodiment, the skin side sheets 21, 31 are exemplified as being formed by kneading a coloring agent into the fibers, but the skin side sheets 21, 31 may also be colored by printing.

[0065] As a result, the color of the skin-side sheets 21, 31 is visible through the non-skin-side sheets 22, 32 and can be seen from the non-skin-side of the diaper 1, forming the first colored region 51. In particular, when the diaper 1 is viewed from the skin-side ( FIG. 2 ), the color of the skin-side sheets 21, 31 appears dark and easily catches the user's eye. Therefore, when the user unfolds the diaper 1 in the longitudinal direction to remove it, the color of the skin-side sheets 21, 31 is visible, and the yellow color, which is complementary to the color of the skin-side sheets 21, 31, is likely to remain as an afterimage. This makes the user more likely to perceive the color of urine on the absorbent main body 10 as intense. Furthermore, the proximity of the skin-side sheets 21, 31 and the absorbent main body 10, which are complementary in color, also makes the color of urine more vivid. This gives the user the impression that the diaper 1 has good absorbency and will not leak even when worn for extended periods of time, allowing the user to use the diaper 1 with confidence.

[0066] In this embodiment, as shown in Fig. 3, the upper ends of the skin-side sheets 21, 31 are located lower than the upper ends of the non-skin-side sheets 22, 32. In this case, the skin-side sheets 21, 31 are not present at the upper end of the diaper 1, forming an uncolored region 54. This makes it easier for the user to identify the upper end of the diaper 1. For example, if the upper end of the diaper 1 tucks inward while putting it on, this fact can be easily noticed, allowing the user to put the diaper 1 on properly.

[0067] 7A to 7C are explanatory diagrams of a modified diaper 1. FIG. 7A is a view of a portion of the diaper 1 in an expanded and stretched state, viewed from the non-skin side, showing a first colored region 51 formed by a colored non-skin-side sheet 22. Unlike the present embodiment, the first colored region 51 may be formed by coloring the non-skin-side sheet 22, 32 located on the non-skin side of the waistline elastic members 23, 33 in at least one of the pair of waistline sections 1A, 1C. It is sufficient that at least a portion of the first colored region 51 is formed by coloring the non-skin-side sheet 22, 32. For this purpose, the non-skin-side sheet 22, 32 may be colored in a first color group (purple and blue colors) or a color similar thereto. The first colored region 51 may be formed by coloring only the non-skin-side sheet 22, 32, or may be formed by coloring a material overlapping the non-skin-side sheet 22, 32 in the thickness direction. 7A shows only the ventral non-skin side sheet 22, but both the ventral and dorsal non-skin side sheets 22, 32 may be colored, or only one of the ventral and dorsal non-skin side sheets 22, 32 may be colored. The non-skin side sheets 22, 32 may be colored entirely or partially. The non-skin side sheets 22, 32 may be colored by kneading a colorant into the fibers or by printing.

[0068] As a result, the color of the non-skin-side sheets 22, 32 is visible from the non-skin-side of the diaper 1, forming the first colored region 51. When the diaper 1 is viewed from the non-skin-side, the color of the non-skin-side sheets 22, 32 appears darker and more easily catches the user's eye. This allows the user to easily recognize that the diaper 1 is suitable for long-term wear, which helps to calm the user. Furthermore, the color of the first colored region 51, which is complementary to the color of the first colored region 51, gives the user the impression that the wearer's skin has good blood circulation, allowing the user to use the diaper 1 with peace of mind.

[0069] Alternatively, the first colored region 51 may be formed by coloring both the skin-side sheet 21, 31 and the non-skin-side sheet 22, 33 in at least one of the pair of waistband portions 1A, 1C. In this case, the color of the first colored region 51 appears darker and more noticeable when the diaper 1 is viewed from both the non-skin side and the skin side. This further enhances the effect of the first colored region 51 (making it easier to recognize that the diaper 1 is suitable for long-term wear and visually alleviating concerns about leakage and health issues when used for long periods of time), allowing the user to use the diaper 1 with peace of mind.

[0070] 7B and 7C are diagrams showing a first colored region 51 formed by a colored outer sheet 14. FIG. 7B shows a portion of the diaper 1 in an expanded and stretched state as viewed from the non-skin side, and FIG. 7C shows a portion of the diaper 1 in an expanded and stretched state as viewed from the skin side. Unlike the present embodiment, the first colored region 51 may be formed by coloring the outer sheet 14, which is located closer to the skin than the absorbent core 11 in the absorbent main body 10. It is sufficient that at least a portion of the first colored region 51 is formed by coloring the outer sheet 14. To achieve this, the outer sheet 14 may be colored in a first color group (purple and blue colors) or a color similar thereto. The first colored region 51 may be formed by coloring only the outer sheet 14, or may be formed together with coloring a material overlapping the outer sheet 14 in the thickness direction. As shown in FIG. 4, a portion of the outer sheet 14 is folded over the skin side of the topsheet 12 to form a leakage-barrier wall portion 2 that can stand up toward the skin side. The outer layer sheet 14 may be colored entirely or partially. The outer layer sheet 14 may be colored by kneading a coloring agent into the fibers, or by printing.

[0071] In this case, when the diaper 1 is viewed from the non-skin side (FIG. 7B), the color of the outer sheet 14 is visible either directly or through the exterior members 20, 30, forming the first colored region 51. Furthermore, when the diaper 1 is viewed from the skin side (FIG. 7C), the color of the outer sheet 14 is also visible directly. This provides the benefits of the first colored region 51 (e.g., making it easier to recognize that the diaper 1 is suitable for long-term wear and visually alleviating concerns about leakage and health issues during long-term use). In particular, the outer sheet 14 constituting the leakage barrier wall 2 is located on the absorbent body 10. Therefore, the complementary color yellow is easily retained as an afterimage, and the color of urine is clearly visible. This gives the user the impression that the diaper 1 has good absorbency and will not leak even when worn for long periods of time, allowing the user to use the diaper 1 with peace of mind.

[0072] So far, we have explained the form in which the colored regions 51, 52 are formed by coloring the back sheet 13 and outer layer sheet 14 of the absorbent main body 10, and the skin side sheets 21, 31 and non-skin side sheets 22, 32 of the exterior members 20, 30. However, this is not limiting, and the colored regions 51, 52 may also be formed by coloring materials other than those mentioned above.

[0073] Furthermore, as shown in Figure 5, when the diaper 1 in an expanded and stretched state is viewed from the non-skin side in the thickness direction, the total area of ​​the first colored regions 51 in the crotch portion 1B is preferably larger than the total area of ​​the second colored regions 52 in the crotch portion 1B.

[0074] The crotch portion 1B of the diaper 1 is sandwiched between the legs (thighs) of the wearer and is adjacent to the skin of the wearer's legs. Therefore, if the color of the wearer's skin is complementary to the color of the first colored region 51, the color of the wearer's legs adjacent to the first colored region 51, which has a large area ratio, will be clearly visible. This gives the user the impression that blood circulation around the legs is good, and the user can be sure that there are no health problems even if the baby wears the diaper 1 for a long time, allowing the diaper 1 to be used with confidence.

[0075] 8 is an explanatory diagram of the crotch portion 1B of a modified diaper 1, showing the crotch portion 1B of the diaper 1 in a flattened and stretched state as viewed from the non-skin side. The pair of waistbands 1A, 1C are indicated by dotted lines. Conversely, when the diaper 1 in a flattened and stretched state is viewed from the non-skin side in the thickness direction, the total area of ​​the second colored regions 52 in the crotch portion 1B may be equal to or greater than the total area of ​​the first colored regions 51 in the crotch portion 1B.

[0076] In this case, since the area ratio of the second colored region 52, which is a warm color, is large, the user feels a warmth in the crotch portion 1B of the diaper 1. This prevents the user from feeling anxious that the crotch portion 1B may cool down due to the large amount of excrement absorbed over a long period of wear, causing a drop in the wearer's body temperature. This allows the user to be sure that there are no health problems with the baby wearing the diaper 1 for a long period of time, and allows the user to use the diaper 1 with peace of mind.

[0077] The diaper 1 of this embodiment also includes a ventral-side outer member 20 and a back-side outer member 30 that is formed as a separate member from the ventral-side outer member 20. When the diaper 1 is in an expanded and stretched state, the absorbent main body 10 has an overlapping region Ro that overlaps in the thickness direction with at least one of the ventral-side outer member 20 and the back-side outer member 30. Furthermore, as shown in Fig. 6, when the absorbent main body 10 is viewed alone from the non-skin side in the thickness direction, it is preferable that the total area of ​​the regions on the non-skin side of the overlapping region Ro that are the same color as the waist elastic members 23, 33 of the ventral-side outer member 20 or the back-side outer member 30 (one of the members) that overlap with the overlapping region Ro is 50% or more of the area of ​​the overlapping region Ro.

[0078] When the multiple waist elastic members 23, 33 are different colors, the region of the multiple waist elastic members 23, 33 that overlaps with the absorbent main body 10 in the vertical direction and that has the same color as the color of the elastic members is defined as the region of the same color as the color of the elastic members. In this embodiment, all of the waist elastic members 23, 33 are white. In this case, the total area of ​​the white regions in the overlapping region Ro should be 50% or more of the area of ​​the overlapping region Ro. In addition, in this embodiment, the material constituting the absorbent main body 10 is white, and the colored region is formed by printing on the backsheet 13. In this case, the total area of ​​the non-colored regions 54 (non-printed regions) in the overlapping region Ro should be 50% or more of the area of ​​the overlapping region Ro.

[0079] This makes the waist elastic members 23, 33 less noticeable in the overlapping region Ro. In particular, in the diaper 1 of this embodiment, as shown in FIG. 5 , portions of the waist elastic members 23, 33 in the overlapping region Ro are cut. This reduces the stretching force of the overlapping region Ro, thereby suppressing lateral contraction (crease formation) of the absorbent core 11. This reduces the likelihood of gaps forming between the absorbent core 11 and the wearer, thereby reducing leakage of body waste. However, in the overlapping region Ro, there will be cut pieces of the waist elastic members 23, 33 and multiple short portions of the waist elastic members 23, 33 that have been intermittently cut. In this case, too, the above-described configuration makes the cut pieces and short portions of the waist elastic members 23, 33 less noticeable. This makes it easier for the user to focus on the portions of the overlapping region Ro other than the waist elastic members 23, 33. Specifically, the user can easily notice the colored areas 51, 52, patterns (e.g., patterns that evoke night or sleeping), and text (e.g., product name, size, front and back indication) arranged in the overlapping area Ro, and can easily obtain the effects and information thereof. In addition, the appearance of the diaper 1 can be improved.

[0080] 6, in both the ventral overlap region Ro and the dorsal overlap region Ro, the total area of ​​the regions that are the same color (e.g., white) as the waist elastic members 23, 33 is 50% or more of the area of ​​the overlap region Ro. However, this is not limited thereto, and the total area of ​​the regions that are the same color as the waist elastic members 23, 33 may be 50% or more of the area of ​​the overlap region Ro only in one of the ventral overlap region Ro and the dorsal overlap region Ro.

[0081] The above area comparison can be performed by the following method. First, the position of the overlapping region Ro (the region overlapping with the outer covering members 20, 30) in the absorbent main body 10 is identified. Next, if necessary, the absorbent main body 10 is separated from the diaper 1 using a cold spray or the like, and the plurality of waist elastic members 23, 33 are also separated from the outer covering members 20, 30. Then, within the overlapping region Ro, a region of the same color as the waist elastic members 23, 33 is identified. Note that the same color is preferably a color with a color difference ΔE of 20.0 or less, and preferably a color difference ΔE of 12.0 or less. The color difference ΔE can be measured for two points using a general-purpose color difference meter (for example, a color difference meter CR-400 manufactured by Konica Minolta, or an equivalent). The color difference ΔE is calculated using a L * a * b * The difference is calculated using a numerical value (color difference formula) based on a color space. Because the waist elastic members 23, 33, which are thread-like elastic members, are thin, it is advisable to measure multiple waist elastic members 23, 33 lined up without any gaps. Then, the area of ​​the region that is the same color as the waist elastic members 23, 33 is divided by the area of ​​the overlap region Ro to determine whether it is 50% or more.

[0082] In particular, it is preferable that the waist elastic members 23, 33 are white and that the overlap region Ro has a high area ratio of white. This improves the visibility of the pattern arranged in the overlap region Ro compared to, for example, a case where the overlap region Ro has a high area ratio of areas colored in the first color group. Even when the outer covering members 20, 30 having colored sheets (here, colored skin-side sheets 21, 31) are overlapped, as in the diaper 1 of this embodiment, the visibility of the pattern arranged in the overlap region Ro is easily maintained.

[0083] On the other hand, in the non-overlapping regions Rn of the absorbent main body 10 that do not overlap with the outer covering members 20 and 30 in the thickness direction, the colored regions 51 and 52, patterns, letters, etc. arranged on the non-skin side of the absorbent main body 10 are directly visible without the outer covering members 20 and 30. Therefore, as shown in FIG. 6 , the overlapping region Ro may have a higher white area ratio than the non-overlapping region Rn. In other words, the value obtained by dividing the total area of ​​the white regions in the overlapping region Ro by the total area of ​​the overlapping region Ro may be greater than the value obtained by dividing the total area of ​​the white regions in the non-overlapping region Rn by the total area of ​​the non-overlapping region Rn. This makes it easier to maintain the visibility of the patterns in the overlapping region Ro, as described above. Meanwhile, the colored regions 51 and 52, patterns, letters, etc. can be formed in the non-overlapping region Rn, and since they are directly visible to the user, they are more likely to catch the user's eye. This makes it easier to obtain the effects and information they provide.

[0084] It should be noted that 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 ΔE from pure white is less than 12. The color difference ΔE for white can be measured using, for example, the general-purpose color difference meter (for example, a color difference meter CR-400 manufactured by Konica Minolta, Inc., or an equivalent).

[0085] 5 and 6, the central region 10c, which is obtained by dividing the absorbent main body 10 in the crotch portion 1B into thirds at its maximum width, is indicated by dotted lines. When the diaper 1 in an expanded and stretched state is viewed from the non-skin side in the thickness direction, the central region 10c preferably has a first colored region 51 and a second colored region 52. In the diaper 1 of this embodiment, the first colored region 51 formed by coloring the back-side outer member 30 (skin-side sheet 31), and the first colored region 51 and the second colored region 52 formed by coloring the absorbent main body 10 (back sheet 13) are provided in the central region 10c.

[0086] The crotch region 1B of the diaper 1 is the region that is sandwiched between the wearer's legs (thighs). While the regions on both sides of the central region 10c are easily crushed by being sandwiched between the legs while the diaper 1 is being worn, the central region 10c is not easily crushed, thereby maintaining the visibility of the colored regions 51 and 52 arranged in the central region 10c. Therefore, as described above, the user can visually recognize the first colored region 51 and the second colored region 52 even while wearing the diaper 1, and these effects can be obtained. In other words, the user can easily recognize that the diaper 1 is suitable for long-term wear, which can calm the user. Furthermore, the color of the first colored region 51, which is complementary to that of the first colored region 51, gives the user the impression that the wearer's skin has good blood circulation. Furthermore, the second colored region 52 prevents the user from feeling anxious that the wearer's body temperature has dropped too low. Therefore, the user can use the diaper 1 with peace of mind.

[0087] Preferably, when the diaper 1 in an expanded and stretched state is viewed from the non-skin side in the thickness direction (FIG. 5), the total area of ​​the first colored regions 51 in the central region 10C is 50% or more of the area of ​​the central region 10C.

[0088] This makes the first colored regions 51 more noticeable to the user while wearing the diaper 1, compared to when the total area of ​​the first colored regions 51 in the central region 10C is less than 50% of the area of ​​the central region 10C. Therefore, the effect of the first colored regions 51 can be more effectively achieved.

[0089] The back-side outer member 30 shown in Fig. 5 has an extension 30E extending further toward the crotch than the side joint SS. The extension 30E increases the area covered by the back of the wearer, thereby reducing the risk of leakage when worn for long periods of time. In this case, when the diaper 1 is in an expanded and stretched state and viewed from the non-skin side in the thickness direction, it is preferable that the total area of ​​the first colored regions 51 in the region of the diaper 1 where the extension 30E is located is 50% or more of the area of ​​the region.

[0090] In the diaper 1 of this embodiment, the colored skin side sheet 31 is located over the entire area of ​​the extended portion 30E. However, the area of ​​the diaper 1 where the extended portion 30E is located includes an area (third colored area 53) where the extended portion 30E and the printing on the absorbent main body 10 overlap and do not correspond to the first colored area 51. Even in this case, it is preferable that the area ratio of the first colored area 51 is 50% or more.

[0091] This makes the first colored region 51 more noticeable to the user, achieving the desired effect. In particular, the extension 30E on the back covers the buttocks. Therefore, if the wearer's skin color is complementary to the first colored region 51, the skin color of the groin adjacent to the extension 30E will be clearly visible, giving the user the impression of good blood circulation. This allows the user to be sure that the baby will not have any health problems even if the diaper 1 is worn for long periods of time, allowing the diaper 1 to be used with peace of mind.

[0092] However, the present invention is not limited to the above, and the area ratio of the first colored region 51 in the region of the diaper 1 where the extension portion 30E is located may be less than 50%, or the back-side outer member 30 may not have the extension portion 30E. Also, unlike the present embodiment, the ventral-side outer member 20 may have a portion that extends further toward the crotch than the side joint portion SS. This also increases the coverage area on the wearer's ventral side, thereby reducing concerns about leakage.

[0093] 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. [Explanation of symbols]

[0094] 1. Pants-type disposable diapers (absorbent articles), 1A waist, 1B crotch, 1C waist, 2 Leakage prevention wall section, 10 absorbent body, 11 absorbent core, 12 surface sheet, 13 back sheet, 14 outer layer sheet, 15 core wrap sheet, 16 leak-proof wall elastic member, 17 leg elastic member, 20 ventral exterior member, 21 skin side sheet, 22 non-skin side sheet, 23 waist elastic member (elastic member), 24 cover sheets, 30 rear exterior member, 30E extension portion, 31 skin side sheet, 32 non-skin side sheet, 33 waist elastic member (elastic member), 34 cover sheets, 51 first colored area, 52 second colored area, 53 third colored area, 54 non-colored area, SS side joint,

Claims

1. In the unfolded state, the device has a longitudinal direction, a left-right direction, and a thickness direction which are perpendicular to each other, an absorbent core comprising a superabsorbent polymer; The average basis weight of the superabsorbent polymer is 270 g / m ２ The absorbent article is as described above, When the absorbent article in the expanded and stretched state is viewed from the non-skin side in the thickness direction, A first colored region and a second colored region are included, the total area of ​​the first colored regions is 50% or more of the area of ​​the absorbent article; 2071U, 2072U, 2073U, 2086U, 2092U, 2093U, 2099U, 2100U, 2133U, 2114U, 2562U, 2563U, 2572U, 2673U, 2582U, 2635U, 2645U, 2705U, 2715U, 2716U, 256U, When 257U, 270U, ​​271U, 520U, 521U, 522U, 527U, 528U, 529U, 530U, 531U, 3575U, 3543U, 7437U, 7438U, 7439U, 7440U, 7444U, 7445U, 7451U, 7452U, 7453U, 7696U, and 7697U are defined as a first color group, the first colored region is a region of a color that corresponds to one of the first color group, In PANTONE color swatches, 100U, 101U, 102U, 106U, 107U, 108U, 113U, 114U, 115U, 120U, 121U, 122U, 123U, 134U, 135U, 136U, 137U, 143U, 144U, 141U, 142U, 1205U, 1215U, 1225U, 1235U, 148U, 149U, 150U, 151U, 155U, 156U, 157U, 162U, 163U, 164U, 165U, 166U, 167U, 168U, 169U, 170U, 171U, 172U, 173U, 174U, 175U, 176U, 177U, 178U, 179U, 180U, 181U, 182U, 183U, 184U, 185U, 186U, 187U, 188U, 189U, 190U, 191U, 192U, 193U, 194U, 195U, 196U, 197U, 198U, 199U, 200U, 201U, 202U, 203U, 204U, 205U, 206U, 207U, 208U, 209U, 210U, 211U, 212U 65U, 712U, 713U, 714U, 715U, 1485U, 1495U, 1505U, Orange021U, 1355U, 1365U, 1375U, 1555U, 1565U, 1575U, 171U, 172U , 489U, 488U, 487U, 1625U, 1635U, 1645U, 1655U, 1665U, 2001U, 2002U, 2033U, 2004U, 2008U, 2009U, 2010U, 2011U, 2012U , 2013U, 2022U, 2023U, 2024U, 2025U, 2026U, 1585U, 2016U, 2017U, 2018U, 3588U, 3564U, 4008U, 4009U, 4031U, 4032U, 4 033U, 4066U, 4067U, 4068U, 7409U, 7410U, 7411U, 7412U, 7413U, 7415U, 7416U, 7417U, 7548U, 7549U, 379U, 380U, 386U, When 387U, 388U, 393U, 394U, 395U, 459U, 460U, 461U, 473U, 474U, 475U, 584U, 585U, 586U, 587U, 600U, 601U, 602U, 603U, 607U, 608U, 609U, 610U, 719U, 720U, 721U, 3935U, 3955U, 3965U, 7506U, 7507U, 7508U, 7499U, 7500U, and 7501U form a second color group, The absorbent article is characterized in that the second colored region is a region of a color that corresponds to one of the second color group.

2. The absorbent article according to claim 1, A pair of waistband portions and a crotch portion, At least one of the pair of waistband portions has an elastic member, a skin-side sheet located closer to the skin than the elastic member, and a non-skin-side sheet located closer to the skin than the elastic member, The absorbent article, wherein the first colored region is formed by coloring one of the skin side sheets.

3. The absorbent article according to claim 1 or 2, A pair of waistband portions and a crotch portion, At least one of the pair of waistband portions has an elastic member, a skin-side sheet located closer to the skin than the elastic member, and a non-skin-side sheet located closer to the skin than the elastic member, The absorbent article is characterized in that the first colored region is formed by coloring one of the non-skin side sheets.

4. The absorbent article according to claim 1 or 2, a topsheet positioned closer to the skin than the absorbent core; and an outer layer sheet positioned closer to the skin than the absorbent core, a portion of the outer layer sheet is folded onto the skin side of the top sheet to form a leak-proof wall portion that can stand up on the skin side; An absorbent article, wherein the first colored region is formed by coloring the outer layer sheet.

5. The absorbent article according to claim 1 or 2, A pair of waistband portions and a crotch portion, When the absorbent article in the expanded and stretched state is viewed from the non-skin side in the thickness direction, An absorbent article, characterized in that the total area of ​​the first colored regions in the crotch portion is larger than the total area of ​​the second colored regions in the crotch portion.

6. The absorbent article according to claim 1 or 2, A pair of waistband portions and a crotch portion, When the absorbent article in the expanded and stretched state is viewed from the non-skin side in the thickness direction, An absorbent article, characterized in that the total area of ​​the second colored regions in the crotch portion is equal to or greater than the total area of ​​the first colored regions in the crotch portion.

7. The absorbent article according to claim 1 or 2, The absorbent body includes a ventral exterior member, a dorsal exterior member formed as a separate member from the ventral exterior member, and an absorbent main body including the absorbent core, In the expanded and extended state, the absorbent main body has an overlapping region that overlaps with at least one of the ventral side exterior member and the dorsal side exterior member in the thickness direction, An absorbent article characterized in that the total area of ​​the area on the non-skin side of the overlapping region that is the same color as the elastic member of one of the members is 50% or more of the area of ​​the overlapping region.

8. The absorbent article according to claim 1 or 2, A pair of waistband portions and a crotch portion, an absorbent body having the absorbent core, When the absorbent article in the expanded and stretched state is viewed from the non-skin side in the thickness direction, An absorbent article characterized in that the first colored region and the second colored region are provided in a central region when the absorbent main body in the crotch portion is divided into three equal parts in the left-right direction.

9. The absorbent article according to claim 8, When the absorbent article in the expanded and stretched state is viewed from the non-skin side in the thickness direction, An absorbent article, characterized in that the total area of ​​the first colored areas in the central region is 50% or more of the area of ​​the central region.

10. The absorbent article according to claim 1 or 2, The absorbent body includes a ventral exterior member, a dorsal exterior member formed as a separate member from the ventral exterior member, and an absorbent main body including the absorbent core, The ventral exterior member and the dorsal exterior member are joined to each other by a pair of side joints at both ends in the left-right direction, The back-side exterior member has an extension portion extending further toward the crotch side than the side joint portion, When the absorbent article in the expanded and stretched state is viewed from the non-skin side in the thickness direction, An absorbent article, characterized in that the total area of ​​the first colored region in the region of the absorbent article where the extension portion is located is 50% or more of the area of ​​the region.

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