Patent ID: 9416275
Filing Date: 2016-08-16
CPC Classification: B29C,B29D,B29K,C08J,C08L

Claim Text:
1. A process for producing biodegradable flexible films, the process comprising the steps of: (a) milling and sieving cassava starch; (b) mixing the milled and sieved cassava starch of step (a) with glycerol to form a first mixture, and storing the first mixture for 12-36 hours at a temperature between 15 and 25° C.; (c) obtaining a thermoplastic starch rod from extrusion of the first mixture at a screw rate from 40 to 60 rpm; (d) drying the thermoplastic starch rod at a temperature between 40 and 50° C. for 12 to 36 hours; (e) mixing polylactic acid and polycaprolactone in the presence of maleic anhydride and benzoyl peroxide to form a second mixture; (f) obtaining pellets from extrusion of the second mixture at a screw rate from 40 to 60 rpm; and (g) obtaining a flexible film from extrusion of a mixture of the dried thermoplastic starch rod of step (d) and the pellets obtained from the second mixture at a screw rate from 40 to 60 rpm.