Tobacco Shreds Research Articles

Experimental Investigation on Influence of Elastic Modulus on Filling Capacity of Shredded Tobacco

The filling capacity of shredded tobacco is related with its resistance to compression and its specific volume. Therefore, it is assumed that the filling capacity (FC) is constituted by three factors, that is, the elastic modulus of tobacco (E), the specific volume of leaf self of tobacco (VM) and the relative bulkiness of tobacco shreds at a loose fill (VP). For the purpose of representing relationships among those four variables, quantitatively, the following multiple regression formula was statistically calculated with many experimental data obtained on typical varieties of natural tobacco cultivated in Japan.(FC)=C1+C2+C3VP+C4VMThe results obtained are as follows:(1) The influence of E on FC was greater than that of VP or VM, VP and VM had similar influence on FC.(2) The esimated precision of other regression formula using VQ (the relative bulkiness of shreds at an initial moment of pressure generation) in place of VP was better than that of the above-mentioned fomula using VP.(3) Similar consequences as (1) and (2) were achieved from other calculation using EG (the elasticity per unit dry weight), VA (the total bulkiness at a loose fill of shreds, VA=VP+VM), VB (the total bulkiness at an initial moment of pressure generation VB=VQ+VM) in place of E, VP, VQ and VM.(4) In conclusion, it was confirmed that the investigation of E is indispensable to analyze FC.

Determination of the Free Burning Rate of Cigarettes / Zur Bestimmung der Glimmrate von Cigaretten

AbstractA method to determine the free burning rate of cigarettes is described. After conditioning the cigarettes are ignited one by one with an electrical heating device and then placed, in vertical position, in boxes of sheet metal and with sliding glass windows. Thus each cigarette is protected from draughts or from heat given off by adjacent cigarettes. A system of holes in the bottom and cover of the boxes permits the necessary air renewal. The time required for the free burning of a given length is determined visually with the aid of a stopwatch. The result of the test is expressed as the weight of tobacco burned per minute and per cigarette. As indicated by results presented in the paper, the method is suited for quality control work involving machine made cigarettes, as well as for the evaluation of different tobacco samples or cigarette papers. If certain precautions are met, the test can also be applied to hand-made cigarettes. The free burning rate was found to be largely determined by the kind of paper and the type of tobacco used. On the other hand, no decisive influence of the arrangement of the tobacco shreds within the cigarette could be observed as long as normally filled cigarettes were used for the tests