Gas-barrier shrink films and their use in deep-drawing...

Details Gas-barrier shrink films and their use in deep-drawing... Gas-barrier shrink films and their use in deep-drawing...

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) B29C 51/14 (2006.01) B32B 7/02 (2006.01) B32B 27/32 (2006.01) B65B 41/00 (2006.01)

Patent

CA 2579074

A multi-layer, gas-barrier, biaxially oriented and heat-shrinkable film comprising a) a first outer heat-sealable layer b) an inner gas-barrier layer, and c) a second outer abuse resistant layer that contains at least 28 % by weight of polystyrene polymer, preferably made up for a major proportion by a high styrene styrene-butadiene block copolymer, in the second outer abuse-resistant layer c) and/or in one or more inner layers positioned between the first outer heat-sealable layer a) and the inner gas-barrier layer b) and/or in one or more inner layers positioned between the gas-barrier layer b) and the second outer abuse layer c). The film of the invention showed to be particularly suitable to be deep- drawn to form a flexible container in a packaging process where the end vacuum lidded package is heat--shrunk.

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