| 摘要 |
FIELD: packaging industry.SUBSTANCE: invention relates to a package, namely to glossy multilayer tubular biaxially oriented casing for food products, mainly for use as a casing for frankfurters, sausages and boiled-smoked, air-dried and uncooked smoked sausages, and smoked processed cheese, and so on. The casing has at least two layers which comprise from 15% to 70% polyamide material and from 30% to 85% of at least one water-soluble polymeric material selected from the list comprising polyvinyl alcohol, vinyl alcohol copolymers, polyvinyl pyrrolidone, copolymers of vinylpyrrolidone, polyoxazoline, cellulose ether; and the value of the transmission rate of water vapour by the casing, measured according to DIN 53122 at 23°C and a relative humidity of 85%, is more than 200 g/m·per day.EFFECT: casing has increased mechanical reliability combined with high permeability with respect to the smoke fume and water vapour, and can be manufactured at high-performance industrial plants.12 cl, 3 tbl, 6 ex |
