| 摘要 |
PURPOSE: A layered polyester film is provided to consist the layers of film by piling each layers, therein main ingredient is polyester film having an appropriate melting point, which is able to be applied to each composition of a functional additive respectively, so that the film is excellent in the adhesive property, appearance, concealment (covering), whiteness, and printing aptitude enough to be used to every sort of the cards. CONSTITUTION: Layers of polyester film A, C, and E are consisted of non-stretched sheets of polyester film, which are produced by melting, and then plasticizing the compounds of polyester resin having 180-220°C of melting point after 0.1-1.0 wt.% of metallic salt sulfonate derivative (chemical formula 1) is mixed with the compounds of polyester resin. Layers of film B and D are consisted by an axle-stretched white film, which are produced by mixing, melting, and then plasticizing the compounds of polyester resin having melting point 180-220°C.; the white inorganic particles 5-30 wt.%; and the kinds of metacrylate compound (chemical formula 2) 3-10 wt.%, wherein the layers A,B,C,D,E are piled up orderly during adhering every layer each other.
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