METHOD FOR PRODUCING BIOLOGICALLY DEGRADABLE FILTERING MEMBERS OR FILTERING CORDS FOR TOBACCO SMOKE FILTERS Russian patent published in 2000 - IPC

FIELD: production of filtering materials. SUBSTANCE: method involves producing filtering material by extrusion; producing filaments and film; using foamed materials from biopolymers on the base of thermoplastic starch and its polymeric compositions for producing filtering cord or filtering material. Plant raw materials may be used as filtering members, which may be put into cigarettes, cigars and smoking pipes for filtering of tobacco smoke. EFFECT: increased efficiency by using plant materials for producing filters which are readily and completely biologically degradable, and provision for obtaining product with improved flavor. 15 cl, 13 dwg, 6 tbl, 8 ex