Biaxially oriented polyolefing film having improved surface...

Details Biaxially oriented polyolefing film having improved surface... Biaxially oriented polyolefing film having improved surface...

2006-10-31

2010-11-02

Wollschlager, Jeffrey (Department: 1791)

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

C264S455000, C264S469000, C264S479000, C264S483000, C264S080000, C264S288400, C264S289300, C264S290200, C156S229000, C156S494000, C156S496000, C427S533000, C427S535000, C427S536000, C427S539000, C427S569000, C427S570000

Reexamination Certificate

active

07824600

ABSTRACT:
The invention relates to a method for raising the surface tension of biaxially-stretched films made of thermoplastic polymers. According to the method, a film is first treated on a surface by means of an atmospheric pressure plasma before being stretched transversally or simultaneously across the width thereof, and the film is additional a subjected to a second treatment by means of a corona or flame after being stretched transversally or simultaneously, the second treatment being done on the same surface which has already been plasma-treated.

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