METHOD AND DEVICE FOR THE PRODUCTION OF BIODEGRADABLE THREADS OR FILAMENTS, THREADS OR FILAMENTS OBTAINED BY SAID METHOD AND CORRESPONDING APPLICATIONS

摘要

The invention relates to a method and device for the production of a thread or filament made from a biodegradable thermoplastic polymer. The method comprises the following steps: hot extrusion (1) of a biodegradable thermoplastic polymer through a die to form a thread, cooling (2) said thread, cold drawing (3,4) said thread with a drawing force (F) slightly less than the force (F') which brings about breakage thereof. The threads and filaments thus obtained are biodegradable with practically no creep and are particularly of use in agriculture.