Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Reexamination Certificate
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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Chang Keunsuk P.
Lee Mark S.
Del Sole Joseph S
Morrison & Foerster / LLP
Sanders James
Toray Plastics (America) Inc.
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