SLANG PAO BASIS AV CELLULOSAHYDRAT MED EN OGENOMSLAEPPLIG FILMBELAEGGNING AV SYNTETISK POLYMER PAO DESS INSIDA OCH ETT GENOMSLAEPPLIGT SKIKT AV SYNTETISK ELASTISK POLYMER PAO DESS UTIDA

摘要

Disclosed is a multiple layered film preferably in the form of a tube and being suitable for forming sausage casings, comprising: a central layer of a cellulose hydrate-based material; a first layer on the inside of the central layer, comprising a film of thermoplastic synthetic resinous material and being impermeable to water and water vapor; and a second layer on the outside of the central layer, comprising a synthetic elastic copolymer and being permeable to water and water vapor. Also disclosed is a method for preparing these film products.