Laminar articles from a polyolefin matrix, ethylene-vinyl alcoho

Details Laminar articles from a polyolefin matrix, ethylene-vinyl alcoho Laminar articles from a polyolefin matrix, ethylene-vinyl alcoho

1993-08-24

1995-03-21

Clark, W. Robinson

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525240, 525221, 525227, 428500, 428523, C08L 2904, C08L 2308

Patent

active

053996194

ABSTRACT:
The laminar article of the invention comprises a mixture of a polyolefin matrix with a barrier resin of polyethylene-vinyl alcohol copolymer and a compatibilizer selected from an ethylene-ethylenically unsaturated carboxylic acid copolymer such as ethylene methacrylic acid or ethylene acrylic acid, ethylene vinyl acetate, polyethylene vinyl alcohol or mixtures thereof. A process is also claimed for preparing a laminar article with multiple thin, overlapping layers, comprising preparing a melted heterogeneous blend of a polyolefin, an ethylene-vinyl alcohol copolymer, and the above compatibilizer; extending the body of the melt; and cooling the extended body to below the melting point of the polyolefin.

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