The invention concerns a biaxially stretched and thermoset tubular seamless single-
or multi-layered foodstuff skin wherein the layer, or, a multi-layered skin wherein
at least one of the layers, contains a block copolymer with "hard" aliphatic polyamide
blocks and "soft" aliphatic polyether blocks, the block copolymer corresponding
to one of formulae (I) to (III), Ea-(NH-[CH2]x-CO)m-Xa-(A-O)n-A
Xa-(CO-[CH2]x-NH)m-Ea (I),
(II), -[X-(CO-[CH2]x-NH)o-Y-X-(A-O)p-A]-(III).
The invention is particularly suitable as a skin for a sausage which is to be boiled
or heated in water, and does not form folds when the filling is introduced manually,
with no or only slight pressure.
