E.i. Dupont De Nemours and Company

Heiko E Schenck

I-Hwa Lee

Yannick Albertone

Dagmar Laue

Heat shrinkable oriented multilayer films are disclosed that comprise a structural layer, a heat sealing layer and a gas barrier layer. The structural layer comprises a polymer selected from the group consisting of copolymers of ethylene and a Cto C,-ethylenically unsaturated carboxylic acid, ionomers of the copolymers, polyesters, and blends thereof. The heat sealing layer comprises a polymer selected from the group consisting of ethylene vinyl acetate copolymers, ethylene alkyl acrylate copolymers, ethylene alkyl methacrylate copolymers, polyethylene, and blends thereof. The barrier layer, which is positioned between the structural and heat sealing layer, comprises at least one ethylene vinyl alcohol copolymer that has from about 2 to about 8 mol % 1,2-glycol structural units incorporated in the copolymer backbone chain. The films are particularly suitable for use in manufacture of shrinkbags.

Heat shrinkable multilayer film or tube that exhibits shrink stability after orientation

Smokable films, in particular tubular films, comprising i) an aliphatic polyamide and ii) a block copolyetherester elastomer are provided. A process for manufacturing these films is also provided. The films of the invention show excellent water vapor permeability at high temperatures and barrier properties at room temperature. They are suitable for preparation of tubular casings, in particular smoked foodstuff casings.

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Eppstein, DE, United States of America

Heiko E Schenck