Polyamide-based sausage casing

A sausage casing of a polymer blend comprising

• a) nylon 6,
• b) 5-50% by weight, based on the total weight of all polymers in the layer, of a
• b1) aliphatic copolyamides containing units of the formulae --NH--›CH.sub.2 !.sub.5 --CO-- and --NH--›CH.sub.2 !.sub.m --CO-- where m is an integer from 7 to 11, or
• b2) an aliphatic copolyamide containing units of the formulae --NH--›CH.sub.2 !.sub.5 --CO--, --NH--›CH.sub.2 !.sub.n --NH--and --CO--›CH.sub.2 !.sub.o --CO--, where n is an integer from 6 to 12 and o is an integer from 7 to 10, or
• both b(1;) and b(2);
• and
• c) 0-20% by weight of an amorphous copolyamide containing hexamethylenediamine, and at least one of terephthalic acid and isophthalic acid units;
• and
• d) 0-20% by weight of a polyolefin modified by carboxyl groups, wherein the proportion of the component b) is 10-30% by weight, that of the component c) is 5-15% by weight, and that of the component d) is 5-15% by weight, in each case based on the total weight of all polymers in the layer.

A polyamide-based single-layered sausage casing of a polymer blend comprising:

• a) nylon 6,
• b) 5-50% by weight, based on the total weight of all polymers in the layer, of a
• b1) aliphatic copolyamide containing units of the formulae --NH--›CH.sub.2 !.sub.5 --CO-- and --NH--›CH.sub.2 !.sub.m --CO-- where m is an integer from 7 to 11, or
• b2) an aliphatic copolyamide containing units of the formulae --NH--›CH.sub.2 !.sub.5 --CO--, --NH--›CH.sub.2 !.sub.n --NH-- and --CO--›CH.sub.2 !.sub.o --CO--, where n is an integer from 6 to 12 and o is an integer from 7 to 10, or
• both b(1) and b(2);
• and
• c) 0-20% by weight of an amorphous copolyamide containing hexamethylenediamine, and at least one of terephthalic acid and isophthalic acid units;
• and
• d) 0-20% by weight of a polyolefin modified by carboxyl groups.
• wherein a+b+c>50% by weight, based on the total weight of all polymers in the layer.