Method of making biaxially oriented polyolefin film for cold...

Details Method of making biaxially oriented polyolefin film for cold... Method of making biaxially oriented polyolefin film for cold...

2011-08-02

2011-08-02

Del Sole, Joseph S (Department: 1743)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

C264S173160, C264S173190

Reexamination Certificate

active

07988894

ABSTRACT:
The present invention relates to methods of manufacturing multi-layered polyolefin films that provide excellent adhesion to cold seal cohesive formulations. A surface of the film is discharge-treated. It has been found that when the discharge-treated surface has at least 0.3% nitrogen functional groups, it provides an excellent cold seal receptive surface. A biaxially oriented polypropylene film made according the invention may also have a second skin layer, opposite the first layer, which may be used for metallizing, laminating, or printing.

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