Moisture barrier film

Details Moisture barrier film Moisture barrier film

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) B32B 7/12 (2006.01) B32B 27/34 (2006.01) B32B 27/36 (2006.01) B65D 65/40 (2006.01)

Patent

CA 2417184

A multiple layer film useful in moisture barrier packaging applications has at least one layer comprising a blend of propylene polymer or copolymer, and a hydrocarbon resin; and two additional layers comprising a propylene polymer or copolymer, ethylene alpha olefin copolymer, ionomer, polybutene, or blends thereof. A core layer of ethylene vinyl alcohol copolymer or other oxygen barrier material, or high density polyethylene, can be included in some embodiments. A preferred embodiment of the multi-layer film exhibits excellent moisture barrier and optical properties, and shrink properties as well if the film has been oriented. High oxygen barrier is also a feature in embodiments including EVOH or other oxygen barrier materials.

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