Method of producing a starting material for producing biologically degradable sacks and bags

Abstract

PCT Pub. No. WO96/32240 PCT Pub. Date Oct. 17, 1996 A method for preparing high-strength biodegradable woven or knit webs or mesh hose from biodegradable foil material is provided. The method utilizes a biodegradable foil material made of a modified starch and having a softening point between 60.degree. C. and 80.degree. C. and a thickness of between 10 .mu.m and 350 .mu.m. The method includes the steps of subjecting the foil material to a relative humidity between 45% and 65%, slitting the foil material into small foil strips, stretching the small foil strips while heating the strips to between 30.degree. C. to 70.degree. C., and stretching at a stretching ratio between 1:3 to 1:10, at a relative humidity of between 45% and 65%. The stretched small foil strips are cooled to room temperature, and processed into a woven or knit web or mesh hose.

Dependencies are inferred from the claim text.