Method of co-extrusion of polyvinylidene fluoride/polystyrene mu

Details Method of co-extrusion of polyvinylidene fluoride/polystyrene mu Method of co-extrusion of polyvinylidene fluoride/polystyrene mu

1971-03-29

1976-07-06

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

264177R, 264DIG57, B29D 702, B29D 900, B29F 308

Patent

active

039681963

ABSTRACT:
A process is disclosed for producing composite sheeting of polystyrene having a thin protective layer of vinylidene fluoride polymer. The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.

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patent: 3415920 (1968-12-01), Lee et al.
patent: 3423498 (1969-01-01), Lefevre
patent: 3476627 (1969-11-01), Squires
patent: 3491178 (1970-01-01), Nishioka et al.
patent: 3565737 (1971-02-01), Lefevre et al.
patent: 3576707 (1971-04-01), Schrenk et al.
patent: 3659989 (1972-05-01), Uraya et al.
patent: 3660993 (1972-05-01), Matsui et al.
patent: 3671379 (1972-06-01), Evans et al.

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