Process for making coextruded elastomeric films

Details Process for making coextruded elastomeric films Process for making coextruded elastomeric films

1984-11-29

1986-04-01

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264514, 264171, 4251311, 4251335, 425462, 524232, B29C 3510, B32B 702

Patent

active

045796963

ABSTRACT:
A transparent, elastomeric, composite film structure having a core ethylene/vinyl acetate copolymer and outer layers of a low density ethylene homopolymer or copolymer with a small amount of another .alpha.-olefin or vinyl acetate is made by coextrusion of the polymers in a three-layer combining adapter and quenching on a chill roll. This film structure is useful as a wrapping material, especially for heat-sensitive articles.

REFERENCES:
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patent: 3825383 (1974-07-01), Hoagland et al.
patent: 4152387 (1979-05-01), Cloeren
patent: 4197069 (1980-04-01), Cloeren
patent: 4247584 (1981-01-01), Widiger et al.
patent: 4318763 (1982-03-01), Bieler et al.
patent: 4348438 (1982-09-01), Canterino
patent: 4352844 (1982-10-01), Bornstein
patent: 4412025 (1983-10-01), Corwin et al.
"New Adapter Makes Practical Short-Run Coextrusion", Plastics World, Jan.-1980, pp. 58-61.

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