The method of obtaining the hydrated cellulose casings for stuffing meat products

 

(57) Abstract:

Use: manufacture of polymer shells for stuffing meat products. The inventive viscose formed in a precipitation bath through an annular die plate. Received the hydrated cellulose membrane is washed, desulfurized and dried in an inflated condition. Then spend plasticization of products application of glycerol concentration of 80 to 100 wt.%. on its surface.

The invention relates to the production of chemical fibers and films, 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 aqueous solution with a mass fraction of glycerol in the range from 10 to 22%. Drying with hot air flexible tubing is produced in an inflated state by passing through a drying tunnel with a length of 50 m at a speed of 20 m/min, and drying the channel region of the input part has a temperature of 90aboutWith and in the exit area 120aboutWith [1].

Finish hydrocellulose shell includes flushing of membrane current and softened water, desulfurization and plasticization of glycerin before drying. Plasticization is carried glycerin solution circulating it in the range of 15 to 20 l/min at a temperature in the range from 50 to 60aboutC. the Concentration of glycerol 14% corresponds to the density of a solution of 1.01-1,02 g/cm3. The plasticization of the membrane eliminates the fragility and increases the elasticity of the membrane during further processing. Drying of the membranes produced 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, the length of the drying channel 18 m Mass fraction of glycerol in the finished product is 20 2%.

The disadvantages of this method of obtaining hydrate elasticnet the hydrated cellulose membranes;

2) high anisotropy strength in the transverse and longitudinal directions;

3) using an aqueous solution of glycerol, which requires equipment (boats, tanks, tanks, heaters, filters, pumps, etc. and leads to loss of glycerol when spraying and it leaks when operating equipment that is 13% of the total consumption of glycerol;

4) loss of glycerol due to evaporation during drying is 8% (set experimentally);

5) slow down the action of glycerol on evaporation and increase drying time;

6) consumption of heat for evaporation of glycerol;

7) limited speed molding.

The lack of elasticity makes the corrugation of the membrane, and the anisotropy of the strength of the hydrated cellulose membranes in the longitudinal and transverse directions leads to rupture of the casing during the stuffing stuffing. When the gasket shell "works" as the tube is loaded by internal pressure. In this case, the main role is played by the strength in the transverse direction. During thermal treatment of sausages and sausages hanging in a vertical position, the requirements of the isotropy of the shell is particularly increased. In this case, the most loaded is the bottom part of the shell, which imini to be the same, and, therefore, must be the same and the strength of the material in all directions.

The aim of the invention is to improve the quality of hydrate cellulose membranes by increasing elasticity and isotropic while improving the efficiency by reducing losses of glycerin and heat consumption.

This objective is achieved in that the method for producing the hydrated cellulose membranes, including the formation of viscose in a precipitation bath with washing, sulfur removal, drying in an inflated condition, winding and an air-conditioning system according to the invention plasticization is carried out after the drying by the application of glycerol concentration of 80-100% on the surface of the hydrated cellulose membrane.

Since the mass fraction of moisture in the finished product is 20%, then applied the glycerol must have a concentration that does not violate this value, i.e., should not be below 80%. But since the preparation of the solution requires equipment, maintenance, etc. it is advisable to use a standard glycerol concentration 95-100% (GOST 6824-76). Uniform distribution of glycerol on the proposed method is of the same or a shorter period of time, th is La new way.

Because concentrated glycerin is applied in a limited number of dry membrane, the diameter of the past does not change. Fundamentally the diameter changes (increase or shrinkage may occur as a result of changes in the swelling of the shell. The ability of the shell to a noticeable change in diameter occurs during drying of the shell. However, drying it in an inflated condition prevents shrinkage. Recorded during the drying of the structure of the hydrate-cellulose, and, consequently, the diameter of the shell after drying does not change during the application of concentrated glycerin. This allows you to apply glycerin on the shell of a given diameter, i.e., without excessive blow drying process.

Physico-mechanical and elastic properties depend, in particular, from the quantitative content of glycerin in the shell and its uniform distribution in the structure of the hydrate-cellulose.

In the production of shells of different thickness, such as sausage and sausages range, the process of plasticization aqueous solution is not significantly different. Concentrated glycerin requires more time to evenly penetrate the entire thickness of the shell. But the increasing thickness of, for example, to obtain coverplate of glycerol across the shell thickness. Glycerin can be applied to the tapered dried in an inflated state of the membrane at room temperature by any known method, for example squeegee, reverse or direct roller, or a bloated shell plating of concentrated glycerin. The proposed method is carried out by passing a shell about to forcibly rotating the shaft, the surface of which is wetted with glycerol by partial immersion of the shafts in an open container of glycerin. The speed of rotation of the shafts regulate in accordance with the requirements of the quantitative content of glycerin in the finished shell. For casing sausage casing mass fraction of glycerol is 20 2%, to provide resistance to mold food hydrocellulose shells - 40% or more.

The cladding of the plasticizer is to improve its performance properties by increasing elasticity and reduce brittleness required when carrying out the process of the corrugation. One of the criteria for assessing the elasticity is resistant to repeated bending deformations. Determining the number of double bends to the destruction of the membranes produced according to the methods outlined in the laboratory course in textiles the temperature range from 50 to 70aboutC. this requires the heaters, the energy spent. Elevated temperature an aqueous solution of glycerol, as well as other finishing solutions and wash water used for plasticization of the membrane needed to accelerate the physico-chemical diffusion processes, which are accelerated with increasing temperature.

The proposed method allows the use of glycerol at ambient temperature (shop) without additional heating.

The presence of a long-running operation of the air conditioning (from 24 to 72 h) provides uniform distribution of glycerol in the shell at a temperature of 20-25aboutSince, in the General cycle of the receiving shell is not extended.

Plasticized membrane is wound on a bobbin and is directed to air conditioning to achieve a uniform predetermined humidity level. Air conditioning is produced in an air environment at a temperature of 22aboutC and a relative humidity of 65% for 24 or 72 h, depending on the range of finished products.

The invention is illustrated by the following examples.

P R I m e R 1 (comparative). Viscose with parameters: -cellulose 8,4%, NaOH 6.3% and a viscosity of 250 formed through the annular gap ASS="ptx2">

Freshly formed hydrocellulose sosososo membrane process Domostroitelnaya bath, washed with water, disulfiram solution of sodium sulfite, washed with water, plastificator 14% solution of glycerol density 1,012 for 2 min and dried in an inflated condition of the air at a temperature of 110aboutWith the entrance into the drying channel and 60aboutWith the output, with the speed of the shell 10 m/min for 1,2 min.

Get a shell with the following parameters at 30.1 per cent loss of glycerol in the production process: Mass fraction of moisture, % 19 Mass fraction of glycerol, % 20 ultimate tensile stress, tensile, MPa in the longitudinal direction 113 in the transverse direction 83 elongation, %: in a longitudinal direction 57 in the transverse direction 93 Pauperised, 33 mm Number of double bends 3020 Coefficient of the isotropy 0,63

P R I m m e R 2. Freshly-formed membrane process restorative bath, washed with water, disulfiram, washed as in example 1. Next unplasticized the hydrated cellulose membrane is dried in an inflated state at temperatures as in example 1, but at a speed of 12 m/min for 1 minute, Dried hydrate cellulose membrane and flatten the top with distilled glycerin (GOST 6824-76 with changes 1,2). When the speed of rotation of the shafts 1 rpm, the length of the arc of the circumference of the shafts shell 1.5 cm and length is immersed in glycerine arc of the shaft 3 cm get the shell after conditioning for 24 h with the following parameters at 9.1% loss of glycerol in the process: Mass fraction of moisture, % 10 Mass fraction of glycerol, % 20,2 ultimate tensile stress tensile, MPa in the longitudinal direction by 115.7 in the transverse direction 86,0 elongation, %: in the longitudinal direction 64 in the transverse direction 102 Pauperised, mm 33 Number of double bends 3999 Coefficient of the isotropy 0,78

P R I m e R 3. Freshly-formed membrane process restorative bath, washed with water, disulfiram, washed as in example 1. Next unplasticized the hydrated cellulose membrane is dried in an inflated state at temperature as in example 2. Dried hydrocellulose shell tapers and at a temperature of 25aboutTo pass on to the metal shaft by partial immersion in their water-glycerin bath with a mass fraction of glycerol 80%. When the speed of rotation of the shafts 1 rpm, the length of the arc of the circumference of the shafts 1 rpm, the length of the arc of the circumference of the shafts shell 1.5 cm and length is immersed in glycerine arc of the shaft 5 cm processes of receipt: Mass fraction of moisture, % 19 Mass fraction of glycerol, % 20,5 ultimate tensile stress tensile, MPa in the longitudinal direction 120 in the transverse direction 90 elongation, %: in a longitudinal direction 67 in the transverse direction 110 Pauperised, 33 mm Number of double bends 4798 Coefficient of the isotropy of 0.87

P R I m e R 4 (control). Freshly-formed membrane process restorative bath, washed with water, disulfiram, washed as in example 1. Next unplasticized the hydrated cellulose membrane is dried in an inflated state at temperature as in example 2. Dried hydrocellulose shell tapers and at a temperature of 25aboutTo pass on to the metal shaft by partial immersion in their water-glycerin bath with a mass fraction of glycerol 70%. When the speed of rotation of the shafts 1 rpm the arc length of the circumference of the shafts shell 1.5 cm and length is immersed in glycerine arc of the shaft 6 cm get the shell after conditioning for 24 h with the following parameters at 9.1% loss of glycerol in the process: Mass fraction of moisture, % 22 Mass fraction of glycerol, % 19,5 ultimate tensile stress tensile, MPa in the longitudinal direction 117,0 in the transverse direction 87 Relative to The 3248 Coefficient of the isotropy of 0.75

The METHOD of OBTAINING the hydrated cellulose CASINGS FOR STUFFING MEAT PRODUCTS, including forming viscose in a precipitation bath with washing, sulfur removal, drying in an inflated condition, the winding and conditioning, characterized in that, with the aim of improving quality while increasing efficiency of production, plasticization is carried out after drying the coating on the surface of the shell of glycerol concentration of 80 - 100%.

 

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