LYOCELL MATERIAL, CIGARETTE FILTER CONTAINING SUCH MATERIAL, AND METHODS OF THEIR PRODUCTION Russian patent published in 2025 - IPC A24D3/06 

FIELD: tobacco filters smoke.

SUBSTANCE: group of inventions relates to a method for manufacturing a lyocell material for a cigarette filter, to a lyocell material for a cigarette filter, a method for manufacturing a cigarette filter and a cigarette filter. Method of producing lyocell material for a cigarette filter comprises: spinning a lyocell spinning solution; coagulation of spun lyocell spinning solution to produce lyocell multifilament; oiling the lyocell multifilament; and a crimping process comprising placing the oiled lyocell multifilament in a crimping machine so that the lyocell multifilament is exposed to steam and roller pressure, wherein single fineness of yarns making up lyocell multifilament is greater than 4.0 denier and not greater than 8.0 denier. Process of crimping is carried out until compliance with crimp coefficient (K_c), expressed as 1.01≤K_c≤1.30 and calculated as K_c=V₁/V₀, where: V₀ is the speed of the thread before feeding the oiled multifilament into a crimping machine; V₁ is speed of passage of thread, captured by roller in machine to give twisting.

EFFECT: high technological efficiency of filter production, biodegradability of filters.

15 cl, 1 tbl, 7 ex