Polyester film

Details Polyester film Polyester film

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) B29D 7/01 (2006.01) C08L 35/02 (2006.01) C09D 167/02 (2006.01)

Patent

CA 2481620

Polyester films of the present invention are especially used for packaging material, and particularly to polyester film that is preferably used for a food packing container and the like by coloring polyester film with organic pigment. A first polyester film of the present invention contains organic pigment of 0.01 to 5 weight % having a molecular weight of 695 to 1000 in a polyester resin. A second polyester film of the present invention is composed mainly of ethylene terephthalate units, having a polyester resin layer (A) made of polyester resin containing copolymerized compounds of 1.5 to 8 mole % and, moreover, containing of organic pigment of 0.01 to 5 weight % and ethylene terephthalate cyclic trimer of 0.2 to 0.9 weight % in the layer (A).

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