White opaque barrier layer film with excellent lay-flat...

Details White opaque barrier layer film with excellent lay-flat... White opaque barrier layer film with excellent lay-flat...

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2116822

A WHITE OPAQUE BARRIER LAYER FILM WITH EXCELLENT LAY-FLAT PROPERTIES A b s t r a c t The invention relates to a multilayer composite film consisting of a surface layer A, a gas barrier layer C, a heat sealing layer D and, optionally, adhesive or coupling layers B, the individual layers being arranged as follows in the composite film: A a biaxially stretched, white opaque polypropylene film, B an adhesive or coupling layer, C a gas barrier layer with a permeability to oxygen of at most 30 Ncm3/m2 d bar (23°C/0% relative humidity), B an adhesive or coupling layer, D a heat sealing layer, layers A and C optionally being interchangeable.

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