Biopolymer-based flexible-tube type food casing with internal impregnation

A biopolymeric sausage casing which has an impregnation on the side facing the sausage, said impregnation comprising styrene/(meth)acrylate copolymer as hydrophobic, synthetic, organic polymer which comprises groups participating in ionic bonds, covalent bonds or both ionic and covalent bonds with the biopolymers of the sausage casing,

• wherein the impregnation establishes the adhesion of said casing to the sausage, determines peeling properties of said casing and comprises 0.2 to 1.5 g/m2 of hydrophobic, synthetic, organic polymers as film formers and said impregnation does not form a continuous layer, wherein the hydrophobic, synthetic, organic polymer consists essentially of styrene/(meth)acrylate copolymer and is combined with an anionic or cationic promoter, which is present in an amount ranging from 0.1 to 4.0% by weight, based upon the weight of the hydrophobizing polymer.

A biopolymeric food casing which has an impregnation on the side facing the food, said impregnation comprising styrene/(meth)acrylate copolymer as a hydrophobic, synthetic, organic polymer participating in ionic bonds, covalent bonds or both ionic and covalent bonds with the biopolymers of the food casing, the impregnation establishing adhesion of said casing to the food and determining the peeling properties of said food casing, said hydrophobic, synthetic, organic polymer applied onto the casing in the form of polymer particles having a median diameter of less than 0.05 micron,

• wherein said food casing comprises pores such that the impregnation penetrates into the pores of the casing and does not form a continuous layer.