Process for the production of biaxially-oriented multilayer poly

Details Process for the production of biaxially-oriented multilayer poly Process for the production of biaxially-oriented multilayer poly

1995-06-06

1996-10-01

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Extrusion molding

15624417, 264483, 26417123, 26417315, 26417319, 264 80, 426127, B29C 3510

Patent

active

055608850

ABSTRACT:
A process for the production of a biaxially-oriented multilayer polypropylene film having a silk-matt finish includes coextruding melts corresponding to the individual layers of the film through a flat-film die; taking off the coextruded film over a take-off roll having a temperature between about 40 and about 100.degree. C.; biaxially stretching the film; thermofixing, and optionally corona-treating, the biaxially-stretched film; and winding up the thermofixed and optionally corona-treated film.

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