JP2016073578A - Disposable wearable article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable wearable article in which a front-rear waist area and a crotch area are formed from differently shaped panels, the wearable article having color applied to substantially the entire area thereof thereby improving design and allowing an underwear-like appearance.SOLUTION: Color is applied to substantially the entire area of a waist panel (14) and a crotch panel (15). Among a first region (61) that is on the waist panel and that does not overlap the crotch panel in a plan view, a second region (62) that is on the crotch panel and does not overlap the waist panel in a plan view, and a third region (63) where the waist panel and the crotch panel overlap in a plan view, the color difference between the region with the highest color density and the region with the lowest color density as seen from the outside is in a range of 0.1-10.0 when waist elastic bodies (41, 42) are in a natural, contracted state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a disposable wearing article.

  Conventionally, disposable wearing articles in which front and rear waist regions and crotch regions are formed from separate panels are known. For example, Patent Document 1 discloses a wearing article including a waist panel that forms a front and back waist region and a crotch panel that forms a crotch region.

JP-T-2006-525858

  In the wearing article disclosed in Patent Document 1, the entire outer surface is formed from a white fiber nonwoven fabric, and the waist panel and the crotch panel are non-colored. Is small, and it is not visually recognized that it is composed of a plurality of panel members.

  However, since such a worn article is entirely white in appearance, it lacks design properties compared to a worn article in which the entire region or a part thereof is colored. Moreover, when the whole outer surface is not colored, the texture of a fiber nonwoven fabric appears and it becomes the external appearance like a disposable wearing article. When coloring the outer surface of the waist panel and the crotch panel in order to improve the design of the wearing article and make it look like underwear, the part where each panel overlaps may become darker than the other part There may be a color difference in the vicinity of the boundary portion of each panel, and it may be recognized that the panel is composed of a plurality of panel members in appearance, and the appearance of underwear may be impaired.

  Accordingly, an object of the present invention is an improvement of the conventional technique, and in a disposable wearing article in which the front and rear waist regions and the crotch region are formed by separate panels, the design is performed by coloring almost the entire region. It is in providing the wearing article which can improve the appearance and can obtain the external appearance like underwear.

  In order to achieve the above-mentioned problem, the present invention is intended to have a longitudinal direction and a lateral direction, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, A disposable wearing article including an annular waist panel forming the front and rear waist region, a crotch panel extending from the crotch region to the front and rear waist region, and a waist opening and a pair of leg openings.

  In the disposable wearing article according to the present invention, the waist panel includes a waist elastic body that is elastically stretchable in the lateral direction, and the waist panel and the crotch panel are colored over substantially the entire area. A first region in the waist panel where the crotch panel does not overlap in plan view, a second region in the crotch panel where the waist panel does not overlap in plan view, and the waist panel and the crotch panel in plan view. Among the overlapping third regions, in the natural state where the waist elastic body contracts, the color difference between the region having the highest color density and the region having the lowest color in appearance is 0.1 to 10.0. Features.

  According to the disposable wearing article according to the present invention, the waist panel and the crotch panel are colored over substantially the entire area, so that the design of the wearing article is improved. Further, the first region of the waist panel where the crotch panel does not overlap in plan view, the second region of the crotch panel where the waist panel does not overlap in plan view, and the third region where the waist panel and the crotch panel overlap in plan view Among them, in the natural state where the waist elastic body contracts, the color difference between the highest color density region and the lowest color region in appearance is in the range of 0.1 to 10.0. The color difference in the part where the boundary between panels is formed is small, and an impression like underwear can be given.

The drawings illustrate specific embodiments of the invention and include selective and preferred embodiments as well as the essential features of the invention.
The perspective view which looked at the disposable diaper in 1st Embodiment shown as an example of the disposable wear article which concerns on this invention from the front side. The partial fracture | rupture expansion | deployment top view of the diaper extended in the vertical direction and the horizontal direction until the maximum expansion | extension of each elastic body (to the extent that the gathers by the contraction effect | action of an elastic material are lost). The exploded perspective view of a diaper. (A) The partially broken top view which looked at the front waist panel from the skin opposing surface side in the state which removed the crotch panel. (B) The top view which looked at the front waist panel from the non-skin opposing surface side in the state which attached the crotch panel. (A) The partially broken top view which looked at the back waist panel from the skin opposing surface side in the state which removed the crotch panel. (B) The top view which looked at the back waist panel from the non-skin opposing surface side in the state which attached the crotch panel. The perspective view of the diaper which concerns on 2nd Embodiment. The figure similar to FIG. 4 of the diaper which concerns on 2nd Embodiment. The figure similar to FIG. 5 of the diaper which concerns on 2nd Embodiment. The figure similar to FIG. 5 of the diaper in a modification. The perspective view which looked at the diaper in a modification from the back side.

<First Embodiment>
1 to 5, a disposable diaper 10 which is an example of a disposable wearing article according to the first embodiment of the present invention includes a longitudinal direction Y and a transverse direction X orthogonal thereto, a skin facing surface, and the opposite. A non-skin facing surface on the side, a front waist region 11, a rear waist region 12, and a crotch region 13 positioned between the front and rear waist regions 11, 12, and forming an annular front and rear waist region 11, 12 Including a panel 14 and a crotch panel 15 having an absorbent body 16 extending from the crotch region 13 to the front and rear waist regions 11, 12. The waist panel 14 includes waist elastic bodies 41, 42 elastically extendable in the lateral direction X. Including. In each figure in which the diaper 10 is developed, each elastic body to be described later is in an extended state against the contraction force. The diaper 10 has a vertical axis P that bisects the dimension in the horizontal direction X, and a horizontal axis Q that bisects the dimension in the vertical direction Y.

  The waist panel 14 and the crotch panel 15 are formed from a colored sheet in which any of the sheet members constituting the waist panel 14 and the chromatic color is colored, so that the substantially entire area of the diaper 10 is visually observable in appearance. Have. In addition, the area | region shown with a dot in each figure shows the darkness of the color attached | subjected to the waist panel 14 and the crotch panel 15, Comprising: The area | region where the density of coloring in an external appearance is so high that the density of a dot is high. means. Further, in the present embodiment, “in the natural state, the concentration of coloring in the appearance of the diaper is high” means that the influence of gather caused by the arrangement of the elastic body or that the colored sheets overlap in plan view. This means that the fibers become dense, and the color colored on the waist panel 14 and the crotch panel 15 can be seen deeply in appearance. Therefore, it does not necessarily represent the color density of the waist panel 14 and the crotch panel 15 when the waist panel 14 and the crotch panel 15 are fully extended (the respective elastic bodies shown in FIG. 2 are extended).

<Waist panel>
The waist panel 14 has an elastic belt function and includes a front waist panel 17 that forms the front waist region 11 and a rear waist panel 18 that forms the rear waist region 12. The front waist panel 17 includes an inner edge 17a and an outer edge 17b that extend in the horizontal direction X and face each other in the vertical direction Y, and both side edges 17c that extend in the vertical direction Y between the inner and outer edge edges 17a and 17b. It has a defined rectangular shape. The rear waist panel 18 includes an inner edge 18a and an outer edge 18b that extend in the lateral direction X and face each other in the longitudinal direction Y, both side edges 18c that extend inward in the longitudinal direction Y from the outer edge 18b, It has a substantially trapezoidal shape defined by an inner edge 18d extending obliquely inward from the edge 18c. The rear waist panel 18 is located in the crotch region 13 and the rectangular rear waist portion 23 extending in the lateral direction X between the side edges 18c, and is narrower than the rear waist portion 23 and located between the inner edges 18d. And a substantially trapezoidal collar cover portion 24. The opposite side edges 17c of the front waist panel 17 and the opposite side edges 18c of the rear waist panel 18 that are opposed to each other are overlapped with each other and are known in the side seam 19 that is intermittently arranged in the longitudinal direction Y, for example, hot embossing, sonic The waist opening 21 and the pair of leg openings 22 are defined by various heat welding means.

  The front and rear waist panels 17 and 18 are inner layer sheets (colored sheets) 31 and 32 positioned on the skin facing surface side, outer layer sheets 33 and 34 positioned on the non-skin facing surface side, and the skin of the inner layer sheets 31 and 32, respectively. And auxiliary sheets 35 and 36 that cover the front and rear end edges 20a and 20b of the crotch panel 15 to be described later.

  The inner layer sheets 31 and 32 form the outer shape of the front and rear waist panels 17 and 18. The outer layer sheets 33 and 34 are formed to have a dimension in the longitudinal direction Y larger than that of the inner layer sheets 31 and 32, and a main part that forms the outer shape of the front and rear waist panels 17 and 18, and the main part to the outside in the vertical direction Y. It has extension parts (first auxiliary sheets) 33a and 34a that extend. The extending portions 33 a and 34 a are bent toward the inner layer sheets 31 and 32 along a folding line extending in the lateral direction X, and are fixed to the skin facing surfaces of the inner layer sheets 31 and 32. In addition, you may form the extension parts 33a and 34a from the outer layer sheets 33 and 34 and a separate sheet | seat member. The auxiliary sheets (second auxiliary sheets) 35 and 36 are formed in a rectangular shape and extend in the lateral direction X between both side edges of the front and rear waist regions 11 and 12, and the front and rear end portions 15 </ b> A and 15 </ b> B and the inner layer of the crotch panel 15. It is fixed to the sheets 31 and 32.

The inner and outer layer sheets 31 to 34 and the auxiliary sheets 35 and 36 are, for example, liquid-impervious or hardly liquid-permeable and preferably have air permeability, and a mass per unit area of about 10 to 40 g / m ^2. Various known fiber nonwoven fabrics, such as spunbond fiber nonwoven fabrics, melt blown fiber nonwoven fabrics, SMS (spunbond / meltblown / spunbond) fiber nonwoven fabrics, and air-through fiber nonwoven fabrics can be used. In the present embodiment, the inner layer sheets 31 and 32 have a mass of about 13 g / m ² , and the outer layer sheets 33 and 34 have a mass of about 17 g / m ² .

  3 to 5, a front waist elastic body (waist elastic body) 41 extending in the lateral direction X in the front waist region 11 is contracted between the inner and outer layer sheets 31 and 33 of the front waist panel 17 in an expanded state. Installed as possible. Between the inner and outer layer sheets 32, 34 of the rear waist panel 18, a rear waist elastic body (waist elastic body) 42 extending in the lateral direction X in the rear waist region 12, and the lateral cover X in the lateral cover portion 24 are located. The extending buttocks elastic body 43 is attached in a stretched state so as to be contractible. The front and rear waist panels 17 and 18 have front and rear waist elastic regions 45 and 46 and a buttocks elastic region 47 that can be elastically expanded and contracted by arranging each elastic body.

<Each elastic region>
The front waist elastic region 45 is located in the front waist region 11 and extends in the horizontal direction X at the edge of the waist opening 21 and the front second elastic region extends in the horizontal direction X on the crotch region 13 side. 45B and a front third elastic region 45C located outside the longitudinal first direction Y of the absorber 16 and between the front first elastic region 45A and the front second elastic region 45B. The rear waist elastic region 46 is located in the rear waist region 12 and extends in the lateral direction X at the edge of the waist opening 21, and the rear second elastic region extends in the lateral direction X on the crotch region 13 side. 46 </ b> B and a rear third elastic region 46 </ b> C located outside the longitudinal direction Y of the absorbent body 16 and between the rear first elastic region 46 </ b> A and the rear second elastic region 46 </ b> B. The buttock elastic region 47 is formed in the buttock cover portion 24.

  In the front waist region 11, the front second elastic region 45 </ b> B is formed of a pair of elastic regions that are spaced apart from each other in the lateral direction X, and the front waist elastic body 41 disposed in each elastic region It extends from the side edge 17 c of the waist panel 17 to the side edge 16 c of the absorber 16. Even if the front waist elastic body 41 is not disposed or disposed in a portion overlapping the central portion of the absorber 16 in a plan view between the pair of front second elastic regions 45B, the contraction force is substantially exhibited. The front non-elastic region is located.

  In the rear waist region 12, the rear second elastic region 46 </ b> B and the buttocks elastic region 47 are formed from a pair of elastic regions that are spaced apart from each other in the lateral direction X, and the rear waist disposed in each elastic region The elastic body 42 and the buttocks elastic body 43 extend from the side edge 18 c of the rear waist panel 18 to the side edge 16 c of the absorber 16. The rear waist elastic body 42 and the buttocks elastic body 43 are not arranged or arranged in a portion overlapping the central portion of the absorber 16 in a plan view between the pair of the second rear elastic area 46B and the buttocks elastic area 47. However, the inelastic region is located where the contraction force is not substantially exhibited.

  The skin facing surface side of the front and rear first elastic regions 45A and 46A is covered with the extending portions 33a and 34a of the outer layer sheets 33 and 34. The front and rear end edges 20a and 20b of the crotch panel 15 are positioned in the front and rear third elastic regions 45C and 46C, and at least a part of the front and rear third elastic regions 45C and 46C on the skin facing surface side is provided by the auxiliary sheets 35 and 36. Covered. In the present embodiment, the entire front third elastic region 45C and a part of the front first elastic region 45A are covered by the auxiliary sheet 35, and a part of the rear third elastic region 46C is covered by the auxiliary sheet 36. Yes.

  Each inelastic region located in the front and rear waist regions 11 and 12 has substantially no contraction force other than that the elastic bodies 41, 42 and 43 constituting the elastic regions located on both sides thereof are cut or removed. The case where a part is arranged in such a manner that it does not appear in the case is included. Thus, since each elastic body 41,42,43 is arrange | positioned so that it may not overlap with the center part of the absorber 16, the gathering which reduces the liquid absorption performance of the absorber 16 by those contraction force, The deformation can be suppressed. In addition, since the front and rear waist elastic bodies 41 and 42 and a part of the buttocks elastic body 43 overlap with both side edge portions 16c of the absorbent body 16 in a plan view, the elastic bodies 41, 42 and 43 contract in the worn state. The central portion of the absorber 16 can be expanded in the lateral direction X by the action.

The front and rear waist elastic bodies 41 and 42 and the buttocks elastic body 43 are formed of a string-like or strand-like elastic material disposed in a state where the fineness is 300 to 1000 dtex and is extended about 1.8 to 3.5 times. can do. In the present embodiment, the front and rear waist elastic bodies 41 and 42 positioned in the first front and rear first elastic regions 45A and 46A are five elastic materials having a fineness of about 620 dtex and stretched about 2.4 times and attached so as to be contractible. The front and rear waist elastic bodies 41 and 42 which are arranged in the longitudinal direction Y and spaced apart at an interval of about 5.0 mm and located in the front and rear second elastic regions 45B and 46B and the front and rear third elastic regions 45C and 46C have a fineness. About 470-620 dtex, about 2.1-2.9 times stretched multiple elastic material attached so as to be shrinkable, spaced apart in the longitudinal direction Y at intervals of about 4.0-5.0 mm Has been.
The correlation of the elongation stress per unit area in each elastic region is such that the front and rear second elastic regions 45B and 46B ≧ the front and rear first elastic regions 45A and 46A> the front and rear third elastic regions 45C and 46C> the hip elastic region 47. Is set.

<Crotch panel>
Referring to FIGS. 2 and 3, the crotch panel 15 has a vertically long and substantially rectangular shape, and extends in the lateral direction X and is opposed to each other in the longitudinal direction Y. The front edge 20 a and the rear edge 20 b, and the front waist panel 17. The front end 15A connected to the skin facing surface, the rear end 15B connected to the skin facing surface of the rear waist panel 18, and the front and rear end portions 15A and 15B extend in the longitudinal direction Y, and And an intermediate portion 15C forming the portion. The front and rear end portions 15A and 15B of the crotch panel 15 are fixed to the inner surfaces of the front and rear waist panels 17 and 18 through a front and rear joining region formed by applying an adhesive means such as a hot melt adhesive.

Referring to FIG. 3, the crotch panel 15 includes a liquid-permeable body-side liner 51, an absorbent body 16 on which the skin facing surface side is coated, and a hydrophobic coating positioned on the non-skin facing surface side of the absorbent body 16. Sheet 53. The body side liner 51 can be formed of, for example, a spunbond fiber nonwoven fabric, an SMS fiber nonwoven fabric or the like having a mass of about 15 to 25 g / m ² and subjected to a hydrophilic treatment. The absorbent body 16 has a liquid absorbent core formed of an absorbent / discrete material such as fluff wood pulp and superabsorbent polymer particles, and a mass of about 10 to 20 g / m ² covering the entire liquid absorbent core. And a liquid-permeable core wrap sheet formed from tissue paper or the like. The covering sheet 53 is formed of a hydrophobic SMS fiber nonwoven fabric or a spunbond nonwoven fabric having a mass of about 10 to 25 g / m ² . Between the covering sheet 53 and the absorbent body 16, a liquid-impervious leak-proof sheet (colored sheet) 54 formed of a plastic film having a gas permeability of about 10 to 25 g / m ² is disposed.

  The covering sheet 53 has both side portions 55 located on the outer side in the lateral direction X of both side edges of the leak-proof sheet 54. Both side portions 55 are bent inward (to the absorbent body 16 side) along a bending line extending in the longitudinal direction Y adjacent to both side edges of the leakproof sheet 54 and fixed to the body side liner 51. The both side portions 55 are fixed to the body-side liner 51 and both end fixing portions 52 that are spaced apart from each other in the longitudinal direction Y, and the both-side edges of the body-side liner 51 and / or both-side edges of the leak-proof sheet 54. The leading edge portion 58a and the distal edge portion (free edge portion) 58b extending in the longitudinal direction Y between the both end fixing portions 52 and extending in the longitudinal direction Y in parallel with the proximal edge portion 58a. In the exploded perspective view shown in FIG. 3, both side portions 55 of the covering sheet 53 are bent in a state where the body side liner 51 and the absorber 16 are separated from the covering sheet 53, and the both end fixing portions 52 are fixed. Indicates no state. The distal edge portion 58b has a sleeve shape formed by bending and fixing the outer edge portion of the covering sheet 53, and a plurality of string-like or strand-like cuff elastic bodies 59 extending in the longitudinal direction Y are in an extended state. It is arrange | positioned so that contraction is possible. When the cuff elastic body 59 contracts, the edge portion 58b is separated from the body side liner 51 toward the wearer's body side to form a leak-proof cuff, and fits the wearer's thigh and leaks excrement. To prevent. Further, a plurality of string-like or strand-like leg elastic bodies 57 extending in the longitudinal direction Y are fixed to the both side portions 55 of the covering sheet 53 on the lateral direction X outside of the leak-proof cuff so as to be contractible in an extended state. Is done. The leg elastic body 57 is formed of a plurality of elastic materials that are spaced apart from each other by a given dimension in the lateral direction X, and forms an elastic band having elasticity within a certain width.

  In the present embodiment, the inner layer sheets 31 and 32 of the front and rear waist panels 17 and 18 are colored in a relatively light color (for example, light blue), and the leakproof sheet 54 of the crotch panel 15 is compared. In particular, it is colored in a deep color (darker than the inner layer sheets 31 and 32. For example, it is darker blue than the inner layer sheets 31 and 32). The fiber nonwoven fabrics forming the colored inner layer sheets 31 and 32 are in their natural state (a state in which no elastic body is disposed. In a case where the elastic body is disposed, a state in which they are stretched). The thickness and fiber density of the sheet are almost the same as a whole so that the colored colors are almost uniform in appearance. The inner layer sheets 31 and 32 can be colored by printing, but when the inner layer sheets 31 and 32 formed of a fiber nonwoven fabric are colored, the constituent fibers are colored by adding a pigment or a dye to the raw material resin. Therefore, even a non-woven fiber nonwoven fabric that is uneven, unlike a plastic film, can be uniformly colored. The inner layer sheets 31 and 32 and the leak-proof sheet 54 are colored in the same color or similar color, and by laminating them, the laminated region is a single layer in which any of the colored sheets is arranged in appearance. The colored color becomes darker than the layer area. Further, since the leak-proof sheet 54 is colored darker than the inner-layer sheets 31 and 32, the area where the leak-proof sheet 54 is arranged is arranged in the area where the leak-proof sheets 54 do not overlap. The shade becomes darker than that of the region (when the elastic body shown in FIG. 2 is extended).

  Since the colored inner layer sheets 31 and 32 are visible through the outer layer sheets 33 and 34, it is preferable that the outer layer sheets 33 and 34 have a light transmittance of at least 60% or more. The leak-proof sheet 54 is visible through the inner and outer layer sheets 31 to 34 and the covering sheet 53, and the light transmittance of the laminated region of the sheets 31 to 34 and 53 is at least 30%. The above is preferable. Further, in order to make the colored color easily transmitted to the outer layer sheets 33, 34, the light transmittance of the inner layer sheets 31, 32 is preferably lower than that of the outer layer sheets 33, 34.

Referring to FIGS. 1, 4, and 5, for convenience of explanation, the diaper 10 includes a first region 61 where the crotch panel 15 does not overlap in the waist panel 14 in the plan view, and the waist panel 14 in the crotch panel 15 in the plan view. A second region 62 that does not overlap and a third region 63 in which the waist panel 14 and the crotch panel 15 overlap in plan view are divided. As described above, in the region where the colored sheet is arranged, the fiber is densely affected by gathers in the portion where each elastic body is arranged when the outer sheet 33, 34 is transmitted. It becomes darker. In this embodiment, since the leak-proof sheet 54 is colored in a darker color than the inner layer sheets 31 and 32, the second area 62 which is the former arrangement area is more than the first area 61 which is the latter arrangement area. In the first region 61, the front and rear waist elastic bodies 41 and 42 are disposed in the first region 61, so that the colored tint is deepened by the influence of the gathers, and the natural state of each diaper 10 (each elastic body is In the contracted state) and in the worn state (the state in which the elastic body is stretched compared to the natural state), the first region 61 and the second region 62 have substantially the same color in appearance.

  The third region 63 where the colored inner layer sheets 31 and 32 and the leak-proof sheet 54 overlap is the region having the highest color density among the regions 61 to 63. However, the first region 61 in which the inner layer sheets 31 and 32 having a relatively low color density are positioned has a high color density by the contracting action of the front and rear waist elastic bodies 41 and 42, and the third region 63 has the front and back waist elasticity. Since an inelastic region where the bodies 41 and 42 are not arranged is formed so that the color density is not increased, the color difference between the first to third regions 61 to 63 is not greatly different. In the diaper 10 according to the present embodiment, the inner layer sheets 31 and 32 in which the second region 62 where the leak-proof sheet 54 that is originally colored in a relatively dark color is disposed are colored in a relatively light color. Where the color density should be higher than that of the arranged first area 61, the color densities of the first area 61 and the second area 62 are substantially equal in a natural state where gathers are formed on the outer surface of the diaper 10. . This is thought to be due to the fibers becoming dense in the first region 61 due to the formation of gathers. In addition, as long as the color difference of each area | region 61-63 exists in the predetermined range, the color density of the 1st area | region 61 is set to 2nd by adjusting the contraction force of the front-and-back waist elastic bodies 41 and 42 in the 1st area | region 61. In addition, the color density of the third regions 62 and 63 may be higher.

In the natural state in which each elastic body contracts, the color difference (ΔE ^* ab) between the region with the highest color density and the region with the lowest color density in the external appearance among the first to third regions 61, 62, 63. In the L ^* a ^* b ^* color system, the range is 0.1 to 10.0. In order to give the diaper 10 an impression like underwear, it is preferable that the regions 61 to 63 have the same color (substantially no color difference) in appearance, but at least the regions 61 to 63 are colored. The color difference (ΔE ^* ab) of the region is preferably in the range of 0.1 to 10.0 for achieving the effects of the present invention. Here, the region having the highest color density in appearance is a region having the highest coloring concentration in appearance in the natural state among the first to third regions that are colored. The region having the lowest color density in appearance is a region having the portion with the lowest color density in appearance in the natural state among the first to third regions that are colored. The color difference (ΔE ^* ab) in the L ^* a ^* b ^* color system can be calculated based on ΔE ^* ab = (ΔL ^{* 2} + Δa ^{* 2} + Δb ^{* 2} ) ^1/2 .

  The diaper 10 according to the present embodiment is composed of the front and rear waist panels 17 and 18 and the crotch panel 15, and even if the entire diaper 10 is colored to give an impression like underwear, the color difference between the regions 61 to 63 is different. There is a possibility that the appearance of underwear may be damaged by visually recognizing the boundary between the panels. By setting the color difference of each of the regions 61, 62, and 63 to 10.0 or less, the color at the boundary of each panel The density is almost uniform, giving an impression of underwear.

  In particular, the inner end edges 17b and 18b of the front and rear waist panels 17 and 18 forming the boundary between the front and rear waist panels 17 and 18 and the crotch panel 15 in a front view and a rear view of the diaper are conspicuous portions such as joints. Then, the appearance that seems to be underwear is impaired by the visual recognition of the outer contour of the part clearly, and there is a possibility that it may be recognized as a diaper, but the color difference in the boundary part is within a predetermined range, The appearance of the diaper 10 is not noticeable, and an overall impression of underwear can be given.

  As described above, since the leak-proof sheet 54 is colored so as to have a higher color density than the inner layer sheets 31 and 32, the correlation between the color densities of the regions 61, 62, and 63 when the diaper 10 is fully extended. The relationship is such that the third region 63> the second region 62> the first region 61. Moreover, at the time of the maximum expansion | extension of the diaper 10, the color difference (The value when arrange | positioning and measuring a white installation board on the skin opposing surface side in the state which extended the diaper 10) of the 1st area | region 61 and the 2nd area | region 62 is It is preferable that it is 10.0 or less.

  The third region 63 is located between the side portions 64 on which the contracting forces of the front and rear waist elastic bodies 41 and 42 and the buttocks elastic body 43 act, and the contracting forces of the elastic bodies 41, 42, and 43. And a central portion 65 that does not substantially act. In both side portions 64 of the third region 63, the front and rear waist elastic bodies 41 and 42 and the buttocks elastic body 43 extend to the both side edge portions 16c of the absorber 16, and the color density of the both side edge portions 16c by the contraction action thereof. However, since the absorber 16 has higher rigidity than the sheet member, it is difficult to form the gathers, and the gathers are formed in the regions where the side edges 16c are located. Compared with the other areas of the three areas 63, the color density is not greatly increased. Further, on the outer side in the lateral direction X of both side edge portions 16c, the stress of the elastic body is concentrated due to the change in rigidity to form fine gathers, and the fibers constituting the uncolored white outer layer sheets 33 and 34 are formed. Density increases. Therefore, a change due to the color difference between the first region 61 and the third region 63 in the vicinity of both side edge portions 16c is suppressed, the outer contour of the absorber 16 is not clearly seen, and the existence of the crotch panel 15 and the absorber 16 is clear. Will not be detected, and there is no risk of damaging the appearance of underwear.

  Each elastic region in the first region 61 has the correlation of the elongation stress described above. Since the gathers are densely formed and the color density is high in the region where the tensile stress is high, the correlation between the color densities in the first region 61 is, in the natural state, the front and rear second elastic regions 45B and 46B ≧ the front and rear first elastic regions. 45A, 46A> front and rear third elastic regions 45C, 46C> collar elastic region 47, and the color difference between the collar elastic region 47 and both side portions 64 of the third region 63 is 10.0 or less.

  As described above, there is a possibility that regions having different color densities may be formed in the first region 61, and the skin facing surfaces of the front and rear first elastic regions 45A and 46A are extended portions that are white (non-colored) sheets ( Auxiliary sheets) 33a and 34a cover the light, thereby reducing the light transmittance and reducing the color difference from other regions.

  Further, the front and rear end edges 20a and 20b of the crotch panel 15 are arranged in the front and rear third elastic regions 45C and 46C, and a boundary portion between the first region 61 and the third region 63 is formed, and the color difference is discriminated in appearance. It becomes easy to be done. As already described, since the white (non-colored) auxiliary sheets 35 and 36 are arranged so as to cover the front and rear end edges 20a and 20b of the crotch panel 15 on the skin facing surface side of the elastic regions 45C and 46C, The auxiliary sheets 35 and 36 reduce the light transmittance and reduce the color difference from other regions.

  Referring to FIGS. 1 and 2, the leak-proof cuff (distal edge 58 b) is formed by a white covering sheet 53, and between the distal edge 58 b and both side edges 16 c of the absorbent body 16. A part of the colored leak-proof sheet 54 is exposed. When the diaper 10 is worn, if a leg is inserted into the leg opening 22 while a part of the leak-proof cuff is bent or twisted, the tip of the leg may be caught by the leak-proof cuff or cause side leakage of excrement. Because of fear, the wearer may check the inner surface of the diaper 10 by expanding the waist opening 21 before wearing. In such a case, if the leakproof sheet 54 and the covering sheet 53 forming the leakproof cuff are the same color (white), there is a possibility that they cannot be visually identified. In this embodiment, the diaper When the leakproof sheet 54 adjacent to the distal edge portion 58b of the covering sheet 53 is colored in the inner surface view of FIG. 10, the shape of the leakproof cuff can be clearly recognized due to the difference in color (contrast). It can correct | amend to the aspect which can stand stably before wearing.

  In the present embodiment, in the front and rear waist panels 17 and 18, the inner layer sheets 31 and 32 of the inner and outer layer sheets 31 to 34 are colored sheets. However, in the appearance of the diaper 10, the colored color is visually recognized. As long as at least one of the inner layer sheets 31 and 32 and the outer layer sheets 33 and 34 is colored. Moreover, although the leak-proof sheet 54 in the crotch panel 15 is a colored sheet, the cover sheet 53 may be colored instead of the leak-proof sheet 54, or both sheets 53 and 54 may be colored. . Thus, in the front and rear waist panels 17 and 18 and the crotch panel 15, regardless of whether the sheet member is a colored sheet, the natural state and the worn state of the diaper 10 are used. The color difference between the first to third regions 61 to 63 can be within a predetermined range. In addition, the color difference of the 1st-3rd area | regions 61-63 should just be the range of 0.1-10.0 in the natural state of the diaper 10 at least.

Second Embodiment
Since the basic configuration of the diaper 10 according to the present embodiment is the same as that of the first embodiment, only different configurations will be described below.

  With reference to FIGS. 6 to 8, in the diaper 10 according to the present embodiment, the front and rear waist panels 17 and 18 are colored on the inner layer sheets 31 and 32, and the outer layer sheets 33 and 34 are not colored (white). The light transmittance is about 60% or more. Between the inner and outer layer sheets 31, 32, 33, and 34, intermediate sheets 71 and 72 on which a decorative element 73 that is visible from the outside of the diaper 10 (outside the outer layer sheets 23 and 24) is printed are disposed. .

  The intermediate sheets 71 and 72 have a substantially rectangular shape, and extend in the horizontal direction X and are opposed to each other in the vertical direction Y. The inner end edges 71a and 72a and the outer end edges 71b and 72b, and the inner and outer end edges 71a, 71b, and 72a. , 72b and both side edges 71c, 72c extending in the vertical direction Y. The inner end edges 71a and 72b substantially coincide with the inner end edges 17a and 18a of the front and rear waist panels 17 and 18, and the outer end edges 71b and 72b are located on the outer side in the longitudinal direction Y of the absorber 16, and in this embodiment. Then, it almost coincides with the front and rear edges 20a, 20b of the crotch panel 15. Both side edges 71 c and 72 c are located on both side portions 64 of the third region 63.

  The intermediate sheets 71 and 72 are formed from a liquid-impervious fiber nonwoven fabric, a liquid-impervious and moisture-permeable plastic film, or a laminate sheet thereof. In the present embodiment, as an example of the decorative element 73, a character pattern imitating an animal is shown. However, as long as the form can be grasped by being visually recognized from the outside, various known graphics, decorative patterns, patterns, characters, It may be a symbol, coloring or the like. In the intermediate sheets 71 and 72, the region excluding the decorative element 73 (hereinafter referred to as the non-decorative region 74) is colored in the same color as the inner layer sheets 31 and 32. The non-decoration region 74 can be colored by printing or adding a chromatic pigment. The light transmittance in the non-decorative region 74 of the intermediate sheets 71 and 72 is about 5 to 50%.

In the diaper 10 of the second embodiment, in the region excluding the decorative element 73, in the natural state in which each elastic body contracts, the color density in the external appearance among the first, second, and third regions 61, 62, 63. The color difference (ΔE ^* ab) between the highest and lowest regions is in the range of 0.1 to 10.0 in the L ^* a ^* b ^* color system. In the third region 63, the color density is the highest in the region where the intermediate sheets 71 and 72 are arranged by overlapping the non-decorative region 74, the inner layer sheets 31 and 32, and the leak-proof sheet 54 of the intermediate sheets 71 and 72. Specifically, the color difference between the non-decoration area 74 of the third area 63 and other areas is in the range of 0.1 to 10.0.

  In this way, in the area excluding the decorative element 73 of the diaper 10, the color differences of the areas 61, 62, and 63 are all 10.0 or less, so that the color density at the boundary portion of each panel is almost uniform in appearance. And give an impression of underwear. Moreover, the decoration element 73 can be clearly visually recognized from the outer surface of the diaper 10 by making the outer layer sheets 34 and 35 uncolored and setting the light transmittance to 60% or more, thereby making the diaper 10 having higher design. be able to.

<Modification>
Referring to FIGS. 9 and 10, in the diaper 10 according to the modified example of the second embodiment, the intermediate sheet 72 in the rear waist panel 18 is disposed only in the rear waist portion 23 and is not disposed in the buttock cover portion 24. . That is, in the third region 63 in the rear waist panel 18, a film lamination region 76 in which the intermediate sheet 72 is disposed and a non-film lamination region 77 in which the intermediate sheet 72 is not disposed, which is located in the collar cover portion 24, are formed. Is done. Since the intermediate sheet 72 is colored in the non-decoration area 74, the color density of the third area 63 is highest in the film lamination area 76, and the correlation of the color density including the second area 62 is a diaper. In the 10 natural states, film lamination area 76> non-film lamination area 77> second area 62. That is, in the area excluding the decorative element 73, the color difference between the film lamination area 76 and the non-film lamination area 77 and the second area 62 and the non-film lamination area 77 is larger than the color difference between the film lamination area 76 and the second area 62. Get smaller. In such a diaper 10, a color gradation is generated so that the color density decreases from the film lamination area 76 toward the second area 62, and the color difference is less likely to be recognized as compared with the case where the non-film lamination area 77 is not formed. Thus, the diaper 10 can be recognized more uniformly as a whole.

  In the second embodiment and the modification, the non-decoration region 74 of the intermediate sheets 71 and 72 can be made colorless and transparent. In the diaper 10, the color difference between the arrangement area of the intermediate sheets 71 and 72 and the non-arrangement area is a value close to 1 in the area of the third area 63 excluding the decorative element 73, and a more underwear-like impression can be given. . Moreover, in the said embodiment and modification, although the crotch panel 15 is arrange | positioned at the skin opposing surface side of the inner layer sheets 31 and 32, the crotch panel 15 is arrange | positioned between the inner layer sheets 31 and 32 and the intermediate | middle sheets 71 and 72. It is good also as composition to do. In the first and second embodiments and the modifications, the fact that the substantially entire region of the diaper 10 has a color that can be visually recognized in appearance is that the outer surface (non-skin facing surface) of the diaper 10 is approximately 90 excluding the non-decorative region 74. % Or more, preferably about 95% or more, and more preferably about 98% or more of the region has a color that is visible in appearance.

In the present specification, the same color means a color in which the difference in L ^* value in the L ^* a ^* b ^* color system is 20 or less, the difference in a ^* value is 10 or less, and the difference in b ^* value is 10 or less. Say. The light transmittances of the inner and outer layer sheets 31 to 34, the intermediate sheets 71 and 72, the covering sheet 53, and the leak-proof sheet 54 are measured according to JIS K 7375, and the color difference meter CR- manufactured by Konica Minolta Co., Ltd. It can be measured using the 300 series.

<Measurement method of color difference>
L ^* value, a ^* value, and b ^* value are measured using a color difference meter CR-300 series manufactured by Konica Minolta Co., Ltd., with a nozzle (nozzle opening diameter: 11 mm) attached to the measuring instrument. It was. The diaper 10 is taken out of the package and placed on a horizontal table, and the diaper 10 is measured for each of the first region 61, the second region 62, the both side portions 64 and the central portion 65 of the third region 63 in the natural state. . The nozzle opening of the measuring device is measured by pressing perpendicularly to the diaper 10 placed on the table (that is, perpendicular to the table). For each of the measurement areas 61, 62, 64, 65, the measurement position is shifted within the measurement area and three measurements are performed. The average value of the three measured values was calculated and used as the L ^* value, a ^* value, and b ^* value in each region 61, 62, 64, 65. “Table 1” shows the measurement results of the color difference of each region of the diaper 10 (the non-decorated region 74 of the intermediate sheets 71 and 72 is colored) according to the second embodiment.

  For each constituent member constituting the disposable diaper 10 of the present invention, various known materials that are usually used in this type of article can be used without limitation in addition to the materials described in the specification. In the specification and claims, terms such as “first” to “third” are used to simply distinguish similar elements, positions, and the like.

  The disclosure relating to the present invention described above can be organized into at least the following matters.

  From the crotch region, an annular waist panel having a longitudinal direction and a lateral direction, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, and forming the front and rear waist regions; In a disposable wearing article including a crotch panel extending to the front and rear waist regions, a waist opening and a pair of leg openings, the waist panel includes a waist elastic body elastically stretchable in the lateral direction, and the waist panel The crotch panel is colored over substantially the entire area, and the first region of the waist panel where the crotch panel does not overlap in plan view, and the second region where the waist panel does not overlap in plan view of the crotch panel. A third region where the region overlaps the waist panel and the crotch panel in plan view Of, in a natural state where the waist elastic member is contracted, the color difference between the lowest area and highest region color density in the appearance view, characterized in that in the range of 0.1 to 10.0.

The present invention disclosed in the above paragraph 0054 can include at least the following embodiments.
(1) The color density at the maximum extension of the first area is lower than the color density of the second area.
(2) The waist panel includes a front waist panel that forms the front waist region and a rear waist panel that forms the rear waist region. In at least one of the front and rear waist panels, The regions are opposed to each other in the lateral direction, and both side portions where the contracting force due to the waist elastic body acts, and the central portion which is located between the both side portions and where the contracting force due to the waist elastic body does not substantially act The both side portions have the highest color density in the natural state, and the color difference between the central portion, the first region, and the second region is in the range of 0.1 to 10.0.
(3) The waist panel includes a front waist panel that forms the front waist region and a rear waist panel that forms the rear waist region, and at least one of the front and rear waist panels is non-skin facing The outer layer sheet located on the surface side, the inner layer sheet located on the skin facing surface side, and located between the inner and outer layer sheets and in the third region, visible from the non-skin facing surface side of the outer layer sheet Intermediate sheet having a decorative element, the outer layer sheet is white and has a light transmittance of 60% or more, the inner layer sheet is colored, and in the region excluding the decorative element, Of the first, second, and third regions, the color difference between the region having the highest color density and the region having the lowest color appearance in the natural state is in the range of 0.1 to 10.0.
(4) The crotch panel is disposed on the skin facing surface side of the inner layer sheet.
(5) The crotch panel is disposed between the inner layer sheet and the intermediate sheet.
(6) In the one waist panel, the third region has a film lamination region in which the intermediate sheet is disposed, and a non-film lamination region located on the crotch region side with respect to the film lamination region, In the area excluding the decorative element, the color difference between the film lamination area and the non-film lamination area and the color difference between the second area and the non-film lamination area are respectively the film lamination area and the second area. Smaller than color difference.
(7) The light transmittance in a region excluding the non-decorative element of the intermediate sheet is in the range of 5 to 50%.
(8) The crotch panel is positioned between the absorbent body, a covering sheet that forms a non-skin facing surface of the crotch panel, and the non-skin facing surface side of the absorbent body. A covering sheet and a pair of leakage preventing cuffs located on the outer side in the lateral direction of the absorbent body. The covering sheet is formed of a fiber nonwoven fabric having a white light transmittance of 60% or more, and The leakage sheet is formed from a colored plastic film, and the leakage prevention cuff is located on the skin facing surface side of the leakage prevention sheet, and is formed from a white fiber nonwoven fabric.

10 Diapers (wearing articles)
11 front waist region 12 rear waist region 13 crotch region 14 waist panel 15 crotch panel 17 front waist panel 18 rear waist panel 61 first region 62 second region 63 third region 64 both side portions 65 central portion 76 film lamination region 77 non-film Laminated area X Horizontal direction Y Vertical direction

In the disposable wearing article according to the present invention, the waist panel includes a waist elastic body that is elastically stretchable in the lateral direction, and the waist panel and the crotch panel are colored over substantially the entire area. A first region in the waist panel where the crotch panel does not overlap in plan view, a second region in the crotch panel where the waist panel does not overlap in plan view, and the waist panel and the crotch panel in plan view. of the third region overlapping, in a natural state where the waist elastic member is contracted, the color difference between the lowest area and highest region color density in appearance when viewed from, Ri range der of 0.1 to 10.0, The crotch panel includes an absorber, a covering sheet that forms a non-skin facing surface of the crotch panel, and the covering sheet. And a leak-proof sheet that is positioned between the absorbent body and covers the non-skin-facing surface side of the absorbent body, and the covering sheet is formed of a fiber nonwoven fabric that is white and has a light transmittance of 60% or more. The leak-proof sheet is formed of a colored plastic film and is colored in a darker color than the inner layer sheet .

Claims (7)

From the crotch region, an annular waist panel having a longitudinal direction and a lateral direction, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, and forming the front and rear waist regions; In a disposable wearing article including a crotch panel extending to the front and rear waist regions, a waist opening and a pair of leg openings,
The waist panel and the crotch panel are colored over substantially the entire area,
The waist panel includes a front waist panel that forms the front waist region, a rear waist panel that forms the rear waist region, and a waist elastic body elastically stretchable in the lateral direction,
At least one of the front and rear waist panels is located on the non-skin facing surface side, is white, and is located on the skin facing surface side, and is colored with an outer layer sheet having a light transmittance of 60% or more. An inner sheet, and an intermediate sheet between the inner and outer layer sheets and located in a region overlapping with the crotch panel in a plan view, and having a decorative element visible in an external view,
In the waist panel, the first region where the crotch panel does not overlap in plan view, the second region where the waist panel does not overlap in plan view in the crotch panel, and the waist panel and the crotch panel overlap in plan view. Among the three regions, in the region excluding the decorative element, the color difference between the region with the highest color density and the region with the lowest color in appearance is 0.1 to 10.0 in the natural state in which the waist elastic body contracts. The said wearing article characterized by being in the range.   The wearing article according to claim 1, wherein the crotch panel is disposed on the skin facing surface side of the inner layer sheet.   The wearing article according to claim 1, wherein the crotch panel is disposed between the inner layer sheet and the intermediate sheet. In the one waist panel, the third region has a film lamination region in which the intermediate sheet is disposed, and a non-film lamination region located on the crotch region side than the film lamination region,
In the area excluding the decorative element, the color difference between the film lamination area and the non-film lamination area and the color difference between the second area and the non-film lamination area are respectively the film lamination area and the second area. The wearing article in any one of Claims 1-3 smaller than a color difference.   The wearing article according to any one of claims 1 to 4, wherein a light transmittance in a region excluding the non-decorative element of the intermediate sheet is in a range of 5 to 50%.   The wearing article according to any one of claims 1 to 5, wherein a color density at the time of maximum extension of the first area is lower than a color density of the second area. The crotch panel includes an absorbent body, a covering sheet that forms a non-skin facing surface of the crotch panel, and a leak-proof covering the non-skin facing surface side of the absorbent body, positioned between the covering sheet and the absorbent body. A sheet, and a pair of leak-proof cuffs positioned on the laterally outer side of the absorber,
The covering sheet is white and is formed from a fiber nonwoven fabric having a light transmittance of 60% or more,
The leak-proof sheet is formed from a colored plastic film,
The said leak-proof cuff is located in the skin opposing surface side of the said leak-proof sheet, and is a wearing article in any one of Claims 1-6 formed from a white fiber nonwoven fabric.

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