Coextruded rigid thermoplastic structures enabling biaxially ori

Details Coextruded rigid thermoplastic structures enabling biaxially ori Coextruded rigid thermoplastic structures enabling biaxially ori

1989-07-21

1991-07-02

Seidleck, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428518, 428520, 428910, B32B 2708

Patent

active

050284762

ABSTRACT:
Biaxially oriented rigid thermoplastic structures with multiple coextruded polymeric layers comprising a layer of vinyl chloride polymer and a coating layer of polymethyl methacrylate containing products absorbing ultraviolet radiation. The content of products absorbing ultraviolet radiation is such that the glass transition temperature of the coating layer does not exceed 105.degree. C., thus permitting an orientation in the range 95.degree.-110.degree. C.

REFERENCES:
patent: 4223054 (1980-09-01), Schramer et al.
patent: 4230768 (1980-10-01), Hamada et al.
patent: 4320174 (1982-03-01), Rabinovitch et al.

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