Process for making coated polypropylene film

Details Process for making coated polypropylene film Process for making coated polypropylene film

1993-05-17

1994-04-12

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264134, 264171, 2642893, 2642896, 2642358, 2642902, B29C 5514

Patent

active

053023277

ABSTRACT:
A process for producing thermoplastic film which is an antifogging, heat-sealable polypropylene film; the antifogging agent is a polyglycerol ester or a sorbitan ester of a fatty acid. The resultant film, which has good clarity, persistent antifogging characteristics, and excellent heat sealability, is useful for packaging refrigerated foods. The disclosure also provides a process for making the film in which the polypropylene-containing thermoplastic resin is extruded into a sheet with subsequent orientation of said sheet in the longitudinal direction to form a monoaxially oriented film; the film is then oriented in the transverse direction.

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European Search Report EP 92 31 1415, The Hague, Mar. 31, 1993.
Database WPIL Sect. Ch, Week 8623, Derwent Pub. Ltd., London; Class A92, AN 86-147723 & JP-A-61 083 038 (Dainippon Printing KK).
Database WPIL Sect. Ch, Week 8744, Derwent Publ. Ltd., London; Class A18, AN 87-311125 & JP-A-62 220 552 (Miyoshi Yushi KK).

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