The method of obtaining the hydrated cellulose membranes

 

(57) Abstract:

Usage: the invention of hydrate cellulose casings for stuffing meat products. The inventive viscose formed in a precipitation bath with getting the hydrated cellulose membranes. Washed, disulfiram and again washed. Dried until the moisture content corresponding to a specified quantity of glycerol in the finished shell installed on the graphical dependence. Then wet the membrane with diameter of 5 - 10% larger than the specified diameter of the finished shell is maintained at 20 to 155°C. the Excess of glycerol is removed. Keeping in glycerol is subjected to a shell with a humidity of 60 to 100% in the form of a tape. 2 C.p. f-crystals, 1 Il., table 1.

The invention relates to the production of chemical fibers, in particular the production of membranes bag method used for stuffing meat products.

A method of obtaining the hydrated cellulose tubular products forming viscose, modified aminoguanidinium in the form of an aqueous emulsion in a precipitation bath, acid treatment freshly formed products, washing and drying, and before the drying processing of the aqueous solution with a mass fraction of glycerol in the range from 10 to 22%. Drying with hot who is th temperature 90aboutWith and at the output 120aboutWith [1].

The closest in technical essence and the achieved result is used in the industry is a method of obtaining hydrate cellulose film for the manufacture of casings of sausages, including continuous molding shell viscose in a precipitation bath with full finishing, drying, and winding shell on a bobbin [2].

Finish hydrocellulose shell includes flushing of membrane current and softened water, desulfurization and plasticization of glycerin. Drying of the membrane is in an inflated state, which at the end of the drying tube at the winding at the time of filling bobbins inside shell injected a small amount of compressed air. Drying parameters shell: the temperature of the steam in the jacket of the dryer from 165 to 185aboutWith excessive pressure of 0.15 MPa, the temperature of the inlet air pipe from 80 to 110aboutWith, at the exit from 30 to 60aboutC. the winding Speed of the shell from 8 to 15 m/min length of the drying channel 18 PM also, before drying shell plastificator solution of glycerol with a density of from 1.01 to 1.02 g/cm3at a temperature of from 50 to 60about(See the same regulation, 50, 51). Mass fraction of glycerol in the finished product is 20 2%.


2) drying of the casing in an inflated condition, as due to shrinkage in the transverse direction during drying are not provided required when processing shell diameter and physico-mechanical properties;

3) waste narzuty membranes during drying due to punctures it with molding to remove gases and fluid that collects inside the shell;

4) large amounts of heat due to losses during convective drying;

5) implementation of plasticization of the membrane with an aqueous solution of glycerol in two barkah before drying.

The aim of the invention is to increase the efficiency while ensuring a given mass fraction of glycerol and moisture by reducing the number of operations by combining drying plasticization, reduce waste by drying of the shell without blowing even with the technological punctures and cuts production space by eliminating two barges for plasticization and reduce the length of the dryer 10-15 times, and reduction in heat consumption by replacing convective drying. The invention also allows to widen the range of Productivist to mold and other

This objective is achieved in that the method for producing the hydrated cellulose membranes, including the formation of the viscose into the precipitation bath, dopostavleno freshly formed products, washing, desulfurization, washing, processing glycerin and winding, according to the invention, the hydrated cellulose membrane after the last washing is dried until the moisture content of the shell, corresponding to a given amount of glycerin in the finished shell installed on the graphical dependence. Next, process the glycerin by keeping wet cellulose casings with a diameter of 5-10% larger than the specified diameter of the finished shell, glycerin at a temperature of from 20 to 155aboutWith the subsequent removal of excess glycerin.

In particular, when receiving the hydrated cellulose casings for sausages in glycerol maintained at a temperature 20-155aboutWith the hydrated cellulose membrane with a humidity of 60 to 100%.

In addition, be kept in glycerol at temperatures above more convenient and economical than wet cellulose membrane in the form of a tape.

During preliminary dehydration of the hydrated cellulose membrane with an initial mass fraction of moisture 300% before treatment gliznoutsa value preliminary dehydration will vary depending on the range of products and, accordingly, the requirements for a given mass fraction of glycerol in the finished product. For example, the hydrated cellulose casing for sausages in the finished product must have a 20 2% glycerol. For specifically selected parameters drying (removal of excess moisture, for example, by heated rolls, temperature) necessary to construct a calibration curve according to the mass fraction of glycerol in the finished shell from the mass fraction of moisture in the shell before drying (see drawing). On the calibration curve determines that the preliminary dehydration should reduce the mass fraction of moisture in the shell before treatment with glycerine in the range from 60 to 100% and will provide after treatment with glycerol when the mass fraction of moisture equal to 60 18% glycerol in the finished product, and with increasing the mass fraction of moisture 100 22% glycerin.

If you see a need in the hydrated cellulose membrane with a mass fraction of glycerol in the finished shell 25%, the preliminary dehydration should reduce the mass fraction of moisture in the shell before processing glycerin to 115% . The calibration curve casings for sausages will take into account the thickness of the shell and have the same character, but different proportion of moisture and glycerol. Pre-dehydrated hydrate cellulose membrane process of concentration is zerina.

For processing glycerin hydrate cellulose membrane using distilled glycerin with a basic substance content of more than 95%. Glycerin bath used for processing at temperatures below 100aboutWith, in need of regeneration by evaporation of accumulated moisture. When the temperature of incubation in glycerol above the 100aboutWith is self-regeneration glycerin bath. Temperature limits process glycerin adopted on the basis of the performed experiments. Fundamentally, according to literary sources, the upper limit temperature permitted when used as a high boiling point organic fluid glycerol, 250aboutC. When the temperature increases evaporation, heat loss, increased safety requirements and the complexity of the technological maintenance, etc. On the proposed method, the upper limit temperature of the glycerol is limited 155aboutC. the Lower temperature limit is determined by considerations of the efficiency of the method, as dehydration membrane occurs even at a temperature of about 5aboutS, i.e. near the freezing temperature of water. But in this case will require artificial cooling glaze sausages with wall thickness from 27 to 32 μm in the medium of glycerin is from 1 to 35 C. Shell, leaving a glycerin bath, carries on the surface layer of glycerin - a "fur coat". This excess mechanical gone glycerol must be removed by any known method to obtain a shell with the specified amount of plasticizer. After removing the "coat" should be no more than 2%.

It is established that during curing of the shell in glycerine in a tapered form its shrinkage in the transverse direction is not more than 10% proprietry, while during convective drying air, the shrinkage is equal to 27%.

To provide a given diameter of the shell in the finished product, controlled by pauperisation, it is possible to use known methods of calibration membrane before drying [3].

The invention is illustrated by the following examples.

P R I m e R 1 (comparative). Take viscose with parameters: -cellulose 8.4%, and NaOH to 6.3%, a viscosity of 250 C. Then formed through the annular slit width of 300 μm die Df=25 mm into the precipitation bath containing 135 g/l H2SO4and 260 g/l Na2SO4.

Freshly formed hydrate cellulose casings for sausages handle Domostroitelnaya bath, washed with water, disulfiram solution of sodium sulfite, etc is at a temperature of 110aboutWith the entrance into the drying channel and 60aboutWith the exit speed of the shell 10 m/min for 1,2 min.

P R I m m e R 2. Freshly-formed shell for sausages handle Domostroitelnaya bath, washed with water, disulfiram, washed as in example 1. Next on the calibration curve (see drawing) determine the degree of pre-dehydration. Because such membranes mass fraction of glycerol in the finished product equal to 202%, to ensure the mass fraction of glycerol 22% preliminary dehydration of the heated rollers is carried out until the mass fraction of moisture 100% . Next, calibrate, passing the sheath through an annular chamber in which the membrane vacuum is stretched to the inner diameter of the annular chamber and sharp edges of the ring calibrating the camera. To ensure specified by THE diameter casings for sausages, controlled pauperisation and equal, in particular, 33 mm, gauge shell to properiety 8% larger than specified, i.e., up to 36 mm Calibrated to properiety 36 mm tapered in the form of a tape shell is immersed and incubated in distilled glycerol (GOST 68 24-76 change 1,2) at a temperature of 20aboutWith over 30 C. the Excess of glycerol, "sucu with properties presented in the table.

P R I m e R 3. Freshly-formed shell for sausages handle Domostroitelnaya bath, washed with water, disulfiram, washed as in example 1. According to the calibration curve (see drawing) preliminary dehydration heated rollers when the mass fraction of moisture 60% provides 18% of the glycerol in the finished shell. Calibrated and maintained in glycerol tapered shell of the same properiety, under the same conditions as in example 2. Excess glycerol remove the rollers. Heat efficiency of 0.95, waste during winding of 1000 m shell 1,63%.

Properties of the resulting membranes are presented in the table.

P R I m e R 4. Freshly-formed membrane process Domostroitelnaya bath, washed with water, disulfiram, washed as in example 1. To ensure that the finished product mass fraction of glycerol 25% according to the calibration curve of the shell is pre-dehydrated heated rollers to the mass fraction of moisture 115%. Calibrated and maintained in glycerol tapered shell of the same properiety, under the same conditions as in example 2. Excess glycerol remove the rollers. Heat efficiency of 0.95, waste during winding of 1000 m shell was not determined.

S membrane process Domostroitelnaya bath, washed with water, disulfiram, washed as in example 1. Pre-dewatered, calibrated, as in example 3, is kept in glycerine in a tapered form at a temperature of 155aboutWith over 1 (example No. 5).

Similarly, provide examples 6-10, but with the following parameters:

when 40aboutC for 20 sec (example 6);

at 60aboutWith in 15 seconds (example 7);

when 80aboutC for 10 s (example 8);

if 105aboutWith over 5 (example 9);

at 125aboutWith over 3 (example 10).

Excess glycerol remove the rollers. Heat efficiency of 0.95, waste winding per 1000 m of the casing, respectively 1,72; 1,81; 1,49; 1,62; and 1,64 1,58%.

Properties of the obtained membranes are presented in the table.

1. The METHOD of OBTAINING the hydrated cellulose MEMBRANES, including the formation of the viscose into the precipitation bath, dopostavleno freshly formed products, washing, desulfurization, washing, processing glycerin and winding, characterized in that, to improve efficiency of production while ensuring a given mass fraction of glycerol and water, the hydrated cellulose membrane after the last washing is dried until the content of moisture corresponding to a given quantity is given by keeping it wet cellulose casings with a diameter of 5 10% larger than the specified diameter of the finished shell, at a temperature of 20 - 155oWith the subsequent removal of excess glycerin.

2. The method according to p. 1, characterized in that the holding glycerol is subjected to a shell with a humidity of 60 - 100%.

3. The method according to PP.1 and 2, characterized in that the holding glycerol is subjected to a shell in the form of a tape.

 

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