Cigarette filter stick capable of improving selective harm reduction effect

Abstract

The invention relates to a cigarette filter stick capable of improving the selective harm reduction effect. The cigarette filter stick comprises a tow filter core and forming paper wrapping the tow filter core, wherein the tow filter core comprises a selective adsorption filter core section close to a cut tobacco and a general filter core section close to the end part of a cigarette; a drainage part is also arranged between the selective adsorption filter core section and the general filter core section; and the drainage part is spaced from the inner side of the forming paper at intervals. According to the cigarette filter stick, due to the arrangement of the drainage part, the airflow resistance in the center of a filter tip is increased, and the airflow flow form of main stream smoke is changed, so that the airflow is forced to transfer to the two sides; more adsorption materials can be in contact with the smoke more uniformly, so that the utilization rate is increased; few smoke components in macromolecular non target adsorptive objects pass through the selective adsorption materials, so that the harm of the smoke components on the selective adsorption materials is reduced, namely material hole blockage or intoxicating phenomenon is reduced.

Description

technical field [0001] The invention relates to the technical field of cigarette manufacture, in particular to a cigarette filter rod capable of improving the effect of selective harm reduction. Background technique [0002] In the prior art, ordinary binary composite filter sticks are usually 25mm or 30mm long, and near the tobacco end is the functional filter stick section, which is a selective adsorption filter element, the conventional design is 15mm, and the ordinary tow filter element is used A certain amount of characteristic adsorption material is added in the filter, followed by ordinary tow filter elements, and its conventional design is 10-15mm. As for the filter rod forming paper, according to the design requirements of the flue gas dilution rate, the two filter rods use the same section of forming paper with a certain degree of air permeability. In this binary composite filter stick, the characteristic adsorption material added in the functional filter stick se...

AI Technical Summary

Problems solved by technology

The selective adsorption material is sprayed on the entire filter element, which causes the peripheral selective adsorption material to contact with less flue gas components and reduce the utilization rate; while the material at the center is exposed to too many components to be adsorbed At the same time, the material in the central part is also exposed to a large number of other large-particle flue gas components, causing the pores of the material to be blocked or the phenomenon of adsorption material poisoning, thereby reducing the selective adsorption efficiency of the material in this part, and its selective harm reduction Efficacy is much lower than laboratory data

Moreover, due to the high price of characteristic adsorption materials, such a large amount will greatly increase the production cost of cigarettes

At the same time, although these adsorbent materials have certain selectivity, it is still difficult to avoid the impact on the aroma of smoke, so it is not advisable to use too much

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