Packaging film, in particular a sausage casing, based on polyamide

Abstract From the Canadian patent

A tubular, biaxially stretch-oriented packaging film, in particular a sausage casing comprising a polymer mixture which comprises an aliphatic polyamide, a polyterephthalic acid ester an aromatic polyamide comprising branched aliphatic diamines having at least 7 carbon atoms and aromatic dicarboxylic acids, or aromatic diamines and aliphatic dicarboxylic acids having 5 to 11 carbon atoms and a dye. The weight amount of the aromatic polyamide is preferably equal to, and particularly preferably greater than, the weight amount of dye. A masterbatch suitable for producing the film is also disclosed. With particular advantage, the film having the above described composition can be dyed deep …