Patent ID: 6919112
Filing Date: 2005-07-19
Classification: A22C,C08L,Y10T

Abstract:
1. A biaxially stretched and thermoset, tubular, seamless, single-layer or a biaxially stretched and thermoset, tubular, seamless, multiple-layer sausage casing having a residual shrinkage in the range of from 5 to 20% at 80° C., wherein the shrinkage is measured before stuffing, in which the layer or, in the case of multiple-layer casings, at least one of the layers comprises a block copolymer containing “hard” aliphatic polyamide blocks having a glass-transition temperature of from 20 to 80° C. and “soft” aliphatic polyether blocks having a glass-transition temperature of from −100 to −20° C., which block copolymer corresponds to the following formula  —[X a —(CO—[CH 2 ] x —NH) o —Y—X a —(A—O) p —A]— where Y is —CO—, —CO—[CH o is an integer from 10 to 150 and p is an integer from 4 to 100 and X A is an alkanediyl radical of the formula x is an integer from 5 to 11, and z is an integer from 4 to 10.