Patent ID: 7976942

Claim:
A single layered tubular sausage casing made from or a multi-layered tubular sausage casing comprising an outer layer made from a thermoplastic mixture which comprises at least one aliphatic polyamide and/or copolyamide, at least one synthetic water-soluble polymer which is not extractable from the casing by hot or cold water, and at least one organic and/or inorganic filler which is present in an amount sufficient to give the casing a very natural matt-silk optical and haptic quality, to reinforce the casing and to increase smoke permeability of the casing, said organic filler being selected from the group consisting of carbohydrates, organic synthetic fibers and organic synthetic powders, the organic filler having an average fiber length or particle size of from 5 to 3,000 μm, and said inorganic filler being selected from the group consisting of fibers and/or beads and/or powders of glass, rock wool short fibers, basalt wool, slag wool, mineral wool fibers, carbonates, sulfates, silicates, oxides and carbon fibers, the inorganic filler having a particle size or fiber length of 0.1 to 3,000 μm, and wherein the casing, in an unstretched, monoaxially or biaxially stretched state, has a water vapor permeability of 50 to 1,200 g/m 2 ·d, and wherein said casing has a thickness of about 40 to about 200 82 m, and wherein the aliphatic polyamide and/or copolyamide is a nylon-4.6, nylon-6, nylon-6.6, nylon-6/6.6, nylon-6.9, nylon-6.10, nylon-6.12, nylon-6/66.9, nylon-6/66.12, nylon-12 and/or a heterofunctional polyamide, the fraction of the aliphatic polyamide and/or copolyamide being 2 to 99% by weight, based on the total weight of the mixture.