| 摘要 |
Disclosed is a filter cigarette whose filter contains fibrous filter material, contains an additive with antimutagenic effects on the cigarette smoke in a quantity equivalent to less than 15 wt % of the weight of fibre and during test smoking of an unventilated filter cigarette of this type but containing no additive, has a nicotine retention RN in %, which satisfies the following formula: RN >= 100 * (1 - D), in which D = exp(A * B + C), A being 21 mm - filter length (mm) for filter lengths <= 25 mm or A being -4 mm for filter lengths > 25 mm, B being 9.3 * 10exp(-3) (1/mm) and C being -(dexp(4) * 'DELTA'p * K + L) with d = filter diameter (mm) wherein 'DELTA'p = draw resistance of the filter (mmWS), K = 1.0228 * 10exp(-6) (1/(mmexp(4) * mmWs)) and L = 0.2334. With this filter mutagenic substances can be filtered with a selectivity at least 10 % better than other smoke components. Also disclosed is an especially suitable process for producing such a filter cigarette.
|
