Multilayer polymeric films

Details Multilayer polymeric films Multilayer polymeric films

2007-08-14

2007-08-14

Chen, Vivian (Department: 1773)

Stock material or miscellaneous articles

Composite

Of polyester

C428S212000, C428S304400, C428S317900, C428S318400, C428S319300, C428S319700, C428S328000

Reexamination Certificate

active

10476733

ABSTRACT:
The use of multilayer film structure comprising at least two unfilled layers of polymeric material substantially devoid of opacifying agent and at least two filled layers of polymeric material wherein said filled layers comprise at least 5% by weight of opacifying agent for providing improved tear-resistance in an opaque polymeric film, particularly a polyester film.

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