SU1214526A1 - Method of packing tobacco - Google Patents

Description

The invention relates to a method for packing tobacco and can be used in the storage and further processing of fine-cut tobacco.

The aim of the invention is to extend the shelf life.

The proposed method is as follows.

The storage of shredded tobacco used in the manufacture of smoking articles is carried out at a centralized enterprise for its production, which provides several nearby tobacco factories with tobacco. Batch of tobacco leaf bags are prepared for cutting using the following technology.

Leaf tobacco is pre-moistened, cleaved, blended and cut without re-wetting. Before cutting, tobacco is applied in an amount of 1.0-3.0%. In the process of preparation, shredded tobacco acquires a moisture content of 12.5-14.5%. Cut tobacco is metered into a container made of gas-vapor-proof polymer film, which is transported by a conveyor onto a vibrating table, where the mass of tobacco is evenly distributed inside the package and pressed. Next, the tobacco is compacted by vacuuming the package to a density of 600-700 kg / m, depending on its physical properties. Compressed ft packaged tobacco is placed by group pallets in a shrink film, stored, and transported to tobacco factories.

Prior to the manufacture of smoking articles, group packaging is removed and the tobacco is heated in vacuumized packages.

Heating of tobacco in sealed heat-resistant polymer bags, having a melting point of at least 140-150 ° C, can be carried out in tunnel heat chambers with convective air heating to a temperature lower than the melting temperature of polymer films by 10-15 ° C. until its temperature reaches 110-135 C, depending on the bag class. After restoring the original structure of the cut tobacco, the package is depressurized and the packaging is removed.

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The heated tobacco is cooled to the temperature of the cigarette shop with simultaneous conditioning to a moisture level of 12.5-14.5% in typical pneumatic dispensing devices. For this, conditioned air is supplied with a temperature of 23-25 ° C and relative humidity of 60-80%. Prior to entering the cigarette shop, tobacco that is open and moisture-conditioned is stored in silos at an air temperature of 23-25 C and a relative humidity of 60-75%.

Example. Humidification

 5 plucked leaf fermented tobacco production bags, of that class with moisture of 14.9% are processed with an amount of 1.5% of the softener, mixed and cut in a laboratory

20 cutting machine. Diethylene glycol is used as the mind of the cleaner. Then, 20DO g of cut tobacco with a moisture content of 13.1% with an initial fiber content of 64% is selected and placed in a bag.

25 450 450 380 mm in size from a combined polyamide-polyethylene

film.

The package is installed on a vibrating table with an electromagnetic drive, which connects it to 3000 oscillations per minute with an amplitude of oscillations of 3-4 Mm. The tobacco is vibrated to evenly distribute the mass inside the package and compact the tobacco.

35 The open part of the bag is heat-sealed, and through the nozzle inserted into one of its walls, air is pumped out with a vacuum oil pump. Cut tobacco acquires

40 density of 628 kg / m. The place of the suction is sealed, the resulting packages are grouped by four pieces into a bag of shrinkable radiation-modified film Thermoplen-1, 45

50

they are stored for long-term storage, then transported over long distances. After storage, group packaging of the film is thermofiltered, and evacuated packages of polyamide-polyethylene are heated in a drying cabinet at 130 ° C for 15 minutes. After restoring the original volumetric properties of tobacco, the package is depressurized and the package is removed. Loosened and heated tobacco is cooled and conditioned to a moisture content of 13% in the pneumo-pulping unit, which is served

air with a temperature of 23 ° C and relative humidity of 75%.

Tables 1-3 show the results of storing cut tobacco of different levels of humidity, pre-treated with a softener of different concentrations, as well as heating the tobacco in vacuumized polymer bags at different temperatures.

As can be seen from the table. 1, the treatment of low humidity with a softener in an amount of more than 3% lengthens the time for storing the cut tobacco in evacuated polymer bags, but at the same time, there is a deterioration in its smoking advantages during storage and subsequent heating. Processing tobacco with a damper in an amount below 1.0% is inefficient, as it does not lengthen the shelf life of the cut gabac. In addition, the heating of tobacco after storage in packages up to 110-135 ° C leads to additional grinding of coarse fiber and pypecification, which increases the consumption of cf in the manufacture of chicken. body products.

The data table. Figure 2 shows that shredded tobacco of different moisture levels, previously processed before cutting with the ear muffler in an amount of 1.5% by weight, is stored in plastic bags under vacuum for different times. Tobacco moisture above 14.5% has a shorter shelf life and, moreover, requires a lot of time for heating the vacuum-pressed fibers. Despite the fact that tobacco moisture below 12.5% is stored for a longer time, it is not advisable to use it, since the heating of tobacco with subsequent cooling is accompanied by loss

4.0 6.0 8.0

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moisture, which leads to additional grinding of coarse fiber and dust formation, and this increases the consumption of raw materials in the manufacture of smoking products.

From the data table. 3 shows that the heating of tobacco in vacuumized

polymer bags to a temperature above 135 C is not rational, since

leads to a deterioration of the hygroscopic properties and reduce the strength of tobacco tissue, and this increases dust generation, reduces fiber content and, in addition, impairs the taste of tobacco. Heating the tobacco to a temperature below requires a longer time to loosen the compressed fibers, and consequently, greater energy consumption for this process.

The proposed method of preparing cut tobacco for storage and processing makes it possible: to extend to 8 to 12 months the shelf life of cut tobacco of reduced humidity under vacuum in plastic bags; to reduce the cost of the process of preparing tobacco for disintegration and stuffing due to the possibility of long-term storage of low-cut cut tobacco and the elimination of such processes as re-moistening of leaf tobacco and heat treatment of cut tobacco; improve the taste and aroma of tobacco, reduce the consumption of sf in the manufacture of smoking products by 1.0-2.0% by increasing the volume-filling properties, reducing losses during storage, transportation and processing of tobacco, preserving the original technological properties; to intensify the process of loosening cut tobacco after storage — by heating to 110-135 C.

Table 1

Continued table. one

table 2

Table 3

Claims (1)

METHOD OF PACKING TOBACCO, including pre-cutting sheet tobacco, dosing it into containers from a gas-vapor-tight polymer film, sealing tobacco under vacuum, followed by sealing the container, characterized in that, in order to lengthen the shelf life, a softener is applied in quantity to the sheet tobacco before cutting it. 1.0-3.0 wt.% Ta- * tank, and the latter is used when dosing in containers, with humidity 12.5-14.5%. ss GS oe>