Patent ID: 7097912

Claim:
An antifogging coextruded and oriented film having at least three layers comprising: an outer layer comprising a polymer selected from the group consisting of polypropylene homopolymer, ethylene-propylene-n-butene terpolymers, ethylene-propylene copolymers, ethylene-n-butene copolymers and mixtures thereof; a skin layer comprising a polymer selected from the group consisting of polypropylene homopolymer, ethylene-propylene-n-butene terpolymers, ethylene-propylene copolymers, ethylene-n-butene copolymers and mixtures thereof and at least one antifogging agent comprising a mixture of glycerol monostearate and diethanolamine and a core layer between the outer layer and the skin layer, comprising a polymer selected from the group consisting of polypropylene homopolymer, ethylene-propylene-n-butene terpolymers, ethylene-propylene copolymers, ethylene-n-butene copolymers and mixtures thereof and at least one antifogging agent comprising a mixture of glycerol monostearate and diethanolamine.