Patent ID: 8012552

Claim:
A smokable biaxially stretch oriented sausage casing, comprising: 15-85 wt % of a polyamide (i) selected from the group consisting of: PA6=H—(NH—(CH 2 ) 5 —CO) n —OH, PA6/66=H—(NH—(CH 2 ) 5 —CO)—OH+H—(NH—(CH 2 ) 6 —HN—CO—(CH 2 ) 4 —CO)—OH (in random order), and a combination of polyamides PA6 and PA6/66; 15-85 wt % of a hydrophilic polymer (ii) containing polyamide PA6 blocks and polyethyleneglycol (PEG) blocks or a combination of hydrophilic polymers (ii), wherein the number-average molar mass of the polyamide PA6 blocks is between 300 and 15,000 and the mass of the polyethyleneglycol (PEG) blocks is between 100 and 6,000, and the ratio of PA6 blocks and PEG blocks in the hydrophilic polymer (ii) is in the range from 1/1 to 3/1, wherein the casing has a moisture vapour transmission rate (MVTR) of more than 400 g/m 2 /24 hours when measured using the ASTM E96 BW method, and the thickness of the casing is 15-45 μm, and wherein the casing comprises one layer.