Cellulose acetate tow band for cigarette filter, cigarette filter, tow band manufacturing apparatus, and tow band manufacturing method

摘要

In a cellulose acetate tow band for a cigarette filter, the filament denier is 5.0 denier or more and the filament ferret area is 0.5 or more and / or the ratio S / L of the filament cross-sectional area S to the cross-sectional circumference L Is 5 or more. The filament denier may be 10 denier or less, the ferret area may be 0.9 or less, and the ratio S / L may be 9 or less. In the tow band manufacturing apparatus or manufacturing method, a circular spinning hole (10) having a diameter of 50 μm or more is used. The diameter of the circular spinning hole (10) may be 100 μm or less.