Claims
- 1. A shaped polymer material having an outer surface wherein the shaped polymer material consists of a light scattering layer having open microvoids and a first hue and a color-developing layer having a second hue different from said first hue of said light scattering layer, wherein said light scattering layer constitutes part or a whole of the outer surface of the shaped polymer material and is a copolymer of acrylonitrile and a copolymerizable comonomer having a hydrophobic group and said color-developing layer constitutes the rest of the shaped material and is an acrylonitrile homopolymer or copolymer containing at least 80 mol % of acrylonitrile, wherein said shaped polymer material changes its color reversibly depending on moisture content of said light scattering layer, such that when said light scattering layer is dry, only said first hue of said light scattering layer is perceived on said part or whole of the outer surface constituted by said light scattering layer, and when said light scattering layer is sufficiently wet to fill said open microvoids with water, both of said first hue of said light scattering layer and said second hue of said color developing layer are perceived on said part or whole of the outer surface constituted by said light scattering layer.
- 2. A shaped material according to claim 1, which is a film.
- 3. A shaped material according to claim 1, wherein the hydrophobic group is a halogen or a halogenated alkyl group.
- 4. A shaped material according to claim 3, wherein the comonomer having a hydrophobic group is at least one selected from the group consisting of vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride, trifluoroethyl (meth)acrylate, and fluoroalkyl (meth)acrylates.
- 5. The shaped material according to claim 1, wherein said shaped material is a fiber.
- 6. The shaped material according to claim 1, wherein said light-scattering layer has a refractive index of from 1.35 to 1.50.
- 7. The shaped material according to claim 1, wherein said light-scattering layer and said color-developing layer are made of the same polymer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-107446 |
Apr 1990 |
JPX |
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Parent Case Info
This application is a divisional of application Ser. No. 07/778,155, filed Dec. 19, 1991, U.S. Pat. No. 5,252,396, which was filed as International Application No. PCT/JP91/00545 on Apr. 24, 1991.
US Referenced Citations (9)
Divisions (1)
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Number |
Date |
Country |
Parent |
778155 |
Dec 1991 |
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