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)=C
1+C
2+C
3V
P+C
4V
MThe 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.
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