Opaque films for use in packaging

Details Opaque films for use in packaging Opaque films for use in packaging

2009-08-05

2011-12-13

Aughenbaugh, Walter B (Department: 1782)

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

C428S317300, C428S319900, C428S343000, C428S3550EN, C428S500000, C428S702000, C428S704000

Reexamination Certificate

active

08075986

ABSTRACT:
An opaque polymer film is prepared by admixing high crystalline polypropylene with a microvoid causing filler and extruding to form a sheet that is then biaxially stretched to form an opaque film. End uses for these films include soda bottles, candy wrappers and synthetic paper.

REFERENCES:
patent: 6750284 (2004-06-01), Dharmarajan et al.
patent: 7294681 (2007-11-01), Jiang et al.
patent: 7553528 (2009-06-01), Biddiscombe

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