CIGARETTE FILTER AND FILTER CIGARETTE

摘要

PROBLEM TO BE SOLVED: To provide cigarette filter and filter cigarette having a high degree of freedom in efficiency in filtering smoke in controlling the filtration efficiency. SOLUTION: This cigarette filter 4 has a core 10 and a sheath 12 both made of cellulose acetate fiber tow. Plural axial passages 16 are formed between the core 19 and the sheath 12 and extend continuously between both end faces of the filter 4.