Curl resistant photoplastic film

Details Curl resistant photoplastic film Curl resistant photoplastic film

1978-11-15

1980-09-16

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428328, 428336, 428483, 428520, 346 77E, 3461351, 365126, 355 9, G01D 1502

Patent

active

042230624

ABSTRACT:
A curl resistant transmissively readable photoplastic film is produced having a base ply of polyethylene terephthalate to one side of which is laminated, in sequence, a light transmissive layer of electrically conductive particles, a primer layer of a dimethyl-phenylene oxide polymer, and a photoplastic layer. The latter layer may be formed from a mixture of 75% by weight of an intermediate molecular weight (800-5,000) polystyrene and 25% by weight of a polymolecular plasticizer derived from alpha-methylstyrene to which mixture has been added about 3.3% of the total weight of solids of very fine particle size copper phthalocyanine. To the other side of the base ply is laminated a layer of a solvent deposited methyl methacrylate polymer. When the photoplastic layer is about 17 to 18 microns thick the methyl methacrylate layer may be about 4 to 6 microns thick.

REFERENCES:
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patent: 4032338 (1977-06-01), Gange
patent: 4077803 (1978-03-01), Gravel
patent: 4098846 (1978-04-01), Olander

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