Process and apparatus for impregnating microporous films and...

Details Process and apparatus for impregnating microporous films and... Process and apparatus for impregnating microporous films and...

C - Chemistry, Metallurgy

08

J

18/1040, 18/33

C08J 9/40 (2006.01) B29C 55/14 (2006.01) B29C 55/18 (2006.01)

Patent

CA 1099882

ABSTRACT OF THE DISCLOSURE There is disclosed a novel process for coating or impregnat- ing a film of a blend of a thermoplastic orientable polymer with an incompatible polymer and inorganic material/ or a polymer matrix having an inorganic filler followed by the selective stretching in a station provided with a set of grooved rollers to form an opaque, low density, porous film. The group pattern of the rolls are generally of a sinosoidal wave wherein the coated or impreg- nated film is stretched in a manner to affect uniform stretching between contact points of the material to produce a material of larger dimension in the direction of stretch. In accordance with a preferred embodiment, there is produced an interleaf for meat impregnated with an antibrowning agent, such as nicotinic acid.

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