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US 4,399,179 AGranted
Polyester laminated film
AssigneeToray Industries, Inc.
InventorsSatoyuki Minami, Ryuichi Nagata, Toshihiro Otaki
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AssigneeToray Industries, Inc.
InventorsSatoyuki Minami, Ryuichi Nagata, Toshihiro Otaki
Estimating the term…
A polyester laminated film which comprises a transparent layer and delustered layer(s) laminated at least on one side face of the transparent layer is provided. The transparent layer is formed by a biaxially stretched polyester film mainly composed of polyethylene terephthalate, while the delustered layer is made of an at least uniaxially stretched polyester film which is mainly composed of a polyethylene terephthalate copolymer containing, as a copolymer composition, 1 to 20 mole % of ##STR1## wherein n is an integer from 2 to 140, and x represents ##STR2## and which also contains inert inorganic particles of 0.3 to 20 microns at 3 to 40% by weight. The film of the present invention as described above is roughened on the surface, and is superior in the writability and transcribability by pencils, ink, indian ink, etc., with an excellent transparency, and therefore, very useful for tracing films and the like.
A polyester laminated film which comprises a transparent layer and a delustered layer laminated at least on one side face of said transparent layer, said transparent layer comprising a biaxially stretched polyester film mainly composed of polyethylene terephthalate, said delustered layer comprising an at least uniaxially stretched polyester film which is mainly composed of a polyethylene terephthalate copolymer containing, as a copolymer composition, ##STR7## (wherein n is an integer from 2 to 140, and X represents ##STR8## by 1 to 20 mol. %, and which also contains inert inorganic particles of 0.3 to 20 microns at 3 to 40% by weight.
Dependencies are inferred from the claim text.