Process for preparing biaxially oriented polypropylene film suit

Details Process for preparing biaxially oriented polypropylene film suit Process for preparing biaxially oriented polypropylene film suit

1995-05-09

1996-11-12

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Limited to treatment of surface or coated surface

264469, 264 80, 26417314, 26417315, 26417319, 2642902, B29C 3510

Patent

active

055737234

ABSTRACT:
A process for producing a biaxially oriented, transparent, multilayered film having a base layer comprising a mixture of a propylene polymer and a resin having a softening point of about 130.degree. to about 180.degree. C., and at least one additional layer comprising a material which can be readily subjected to corona treatment, comprising the steps of (i) coextruding through a slot die the layers of the film so as to produce a multilayer film, (ii) solidifying the multilayer film by chilling, and (iii) orienting the multilayer film by stretching in the longitudinal and transverse directions.

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patent: 5152946 (1992-10-01), Gillette
patent: 5246659 (1993-09-01), Crighton et al.

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