Thermo-formable multilayer barrier film with the appearance...

Details Thermo-formable multilayer barrier film with the appearance... Thermo-formable multilayer barrier film with the appearance...

2007-08-14

2007-08-14

Kruer, Kevin R. (Department: 1773)

Stock material or miscellaneous articles

Hollow or container type article

Glass, ceramic, or sintered, fused, fired, or calcined metal...

C428S036700, C428S516000

Reexamination Certificate

active

09851460

ABSTRACT:
A paper-like multilayer barrier film comprises a filled polypropylene layer and several unfilled layers. The filled layer contains 40-75% by wt. of inorganic fillers, forms one of the two outside layers of the film, and has a thickness of at least 40 μm. The unfilled layers include a barrier layer, a sealing layer, and optionally at least one adhesive layer. The ratio of the total thickness of the unfilled layers to the thickness of the filled layer is in the range of 1:8 to 1:1.2.

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