摘要：

A novel fibrous casing for packaging sausages and other meat and food products comprises a saturating tissue, preferably a long fiber hemp paper, coated or impregnated with an insolubilized polyvinyl alcohol/polyvinyl ester copolymer. The casing is preferably prepared by coating or impregnating a saturating tissue with an aqueous alkaline solution of a polyvinyl alcohol/polyvinyl ester copolymer which is then insolubilized by treatment with acid and optionally by further treatment with a suitable cross-linking agent, viz formaldehyde, etc. The saturating tissue may be coated or impregnated with the polyvinyl alcohol copolymer solution and immediately formed into a tubular casing and the polyvinyl alcohol copolymer regenerated therein by acid treatment or may be coated or impregnated in sheet form, neutralized and dried and subsequently slit to size and formed into a tubular casing in a separate seaming operation. Casings are preferably formed using long fiber hemp paper as the saturating tissue and using polyvinyl alcohol copolymers having a D.S. of OH groups in the range from about 25-80 percent.

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