UA72316C2 - Method of improving the filling ability of tobacco materials - Google Patents

Abstract

The invention relates to a method for improving the filling ability of tobacco, such as cut tobacco leaves, or ribs, or tobacco additives, whereby the tobacco material with an initial water content of up to 15 wt % is treated with a gas, comprising nitrogen and/or argon, at pressures from 50 to 1000 bar with a continuous, or staged compression, followed by a continuous or staged decompression, whereby the compression and decompression steps occur in, either an autoclave, or a cascade-like series of several autoclaves and, finally, a thermal after-treatment of the withdrawn tobacco material. The invention is characterised in that the compression is carried out at a working temperature of over 55°C, preferably from 60 to 90°C and the final water content in the tobacco is in the range of 8 to 14 wt. %.

Description

Tobacco samples were laid out in flat plastic cups and conditioned at a temperature of 21"C and a relative humidity of 6295. The density was determined using a Borgwaldt densitometer (Vogomaia and the specific volume was calculated in milliliters per gram at a given humidity of 12 mass.9o and a given temperature of 227"Sb. Based on the data of the untreated comparative sample and the fluffed sample, the relative improvement in filling, which is also called the fluffing coefficient, was calculated according to the following formula, in which Ev means the filling of the base, and Re means the filling of the fluffed tobacco:

Doyu-(Be-Ev) 100905/Ev

Experiments were carried out for tobacco samples with a moisture content of 8, 12, and 14 wt.9o, as well as for a comparative sample with a moisture content of 18 wt.9o. The working temperature was set at 40, 60, and 80"C using thermostats. The final pressure value was 700 bar, the pressure increase was carried out for 0.5 min. In all experiments, a unified mixture of tobacco of the Migdipia variety was used. The final heat treatment described above was carried out with saturated steam.

The results of the experiments are shown in Table 2, and the results of the comparative experiments are shown in Table 2a. In the tables, Ta means the temperature of the tobacco immediately before removing it from the autoclave, and Or means the relative improvement in filling or fluffing factor.

Table 2

Humidity | Humidity | Humidity

Working tobacco tobacco tobacco 60 | 48) 70 | 25 79 | 18) v8z3 80 |751|78| with | 81 | about | 7 z

Table 2a

Operating temperature "C 7140 | f | 80 60 | 2 | 7 80 | 1 | 54

A comparison of the tables confirms the positive effect of increased working temperature values of 60 and 80"C on improving the filling when using tobacco with a moisture content of less than 15 wt.9o.