Microporous film of polyethylene and process for the production

Details Microporous film of polyethylene and process for the production Microporous film of polyethylene and process for the production

1993-07-12

1994-12-27

Schofer, Joseph L.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428521, 5263481, 526352, B32B 2732

Patent

active

053764455

ABSTRACT:
Microporous film of polyethylene with a high degree of moisture vapor transmission rate and permeability to air and a process for the production of such a film from a polyolefine by extruding a solution of the polyolefine in a first solvent, followed by cooling, the removal of the solvent and stretching of the film, in which both sides of the film are brought into close contact with a second solvent for the polyolefine before the film is contacted with the cooling agent.

REFERENCES:
patent: 4613544 (1986-09-01), Burleigh
patent: 4829096 (1989-05-01), Kitamura et al.
patent: 4833172 (1989-05-01), Schwarz et al.
patent: 4873034 (1989-10-01), Kono et al.
patent: 4948544 (1990-08-01), Van Unem et al.
patent: 4987025 (1991-01-01), Shiraki et al.

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