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Multi-Layer, White Cavitated Bioriented Polyethylene Film With A High Water Vapor Transmission Rate



Published November 30, 2004
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A multi-layer, bioriented film stretched in the machine direction and in the transverse direction has been patented. The film includes a base layer made up of polyethylene and a cavitating agent. The layer has first and second side and skin layers on the first and second sides of the base layer. At least one of the skin layers includes a hydrocarbon resin and a copolymer of ethylene and at least one monomer with at least three carbon atoms. The multi-layer film has a WVTR of at least 3.0 grams/100 square inches/day at 38° C. and 100% relative humidity.