| 摘要 |
<p>Disclosed is a filter cigarette whose filter a) contains fibrous filter material, b) 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 c) during test smoking of an unventilated filter cigarette of this type but containing no additive, has a nicotine retention RN (in %, determined according to CORESTA, recommended method no. 9) 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 * 10-3 (1/mm) and C being -(d4 * 'DELTA'p * K + L) with d = filter diameter (mm) wherein 'DELTA'p = draw resistance of the filter (mmWS), K = 1.0228 * 10-6 (1/(mm4 * mmWs)) and L = 0.2334. With this filter, it has been shown with the Ames test with strain TA 98 that 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.</p> |
