Low pigment content polyester film and process for making...

Details Low pigment content polyester film and process for making... Low pigment content polyester film and process for making...

2005-02-15

2005-02-15

Ferguson, Lawrence D. (Department: 1774)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C428S213000, C428S206000, C428S207000, C428S323000, C428S339000

Reexamination Certificate

active

06855400

ABSTRACT:
The invention relates to a film comprising: (i) at least one polyester layer containing more than 10 wt % of a pigment, and (ii) at least one polyester layer substantially devoid of pigment, where the ratio of the respective thickness of the layer(s) devoid of pigment to the pigmented layer(s) is at least 1. The film shows good mechanical properties together with high opacity properties.

REFERENCES:
patent: 4067855 (1978-01-01), Miwa et al.
patent: 4399179 (1983-08-01), Minami et al.
patent: 5510192 (1996-04-01), Utsumi et al.
patent: 5698308 (1997-12-01), Sumiya et al.
patent: 5837359 (1998-11-01), Shetty et al.

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