CS211649B1 - Process for preparing collagen foil - Google Patents

Abstract

The invention relates to the production of collagen films, which are most often used as packaging for sausages and cheeses. It solves the method of producing collagen films by combining the basic collagen fibrous material with another fibrous material. The solution is based on the homogenization of two components. The first component is a collagen fibrous material made from the reticular layer of beef hide. It is prepared from beef hide by alkaline swelling in a Ca(01i)2 environment, by acid swelling in a HCl solution with a pH of 2 to 3 and by mechanical fiberization. The second component, a fibrous dispersion, is prepared by homogenizing fibrous cellulose, viscose, cotton, polyamide, polypropylene, 'polyester with a maximum fiber length of 10 mm with an aqueous dispersion of glue, starch, polyvinyl alcohol, polyvinyl acetate, carboxymethyl cellulose at a temperature of 40 to 100 ■ C and subsequent cooling to room temperature. Both components are homogenized together in a ratio of 5 parts by weight of collagen fibrillar mass and 1 part by weight of fibrous dispersion. An endless hose of collagen foil is extruded from the paste prepared in this way, which is dried with hot air and stabilized by spraying a glyoxal solution. , The method of producing collagen foils by combining collagen β mass with other fibrous materials can be used in the production of collagen casings for sausages and cheeses.

Description

The present invention provides a process for the preparation of a collagen foil from two components, characterized in that one component is an acid-swollen collagen mass and the other component is a natural Si synthetic fiber dispersed in a hydrophilic polymer gel.

According to existing technology, collagen foils are made of fibrous parts of cowhide, cowhide glue. This is treated in a known manner with alkali and acids, most often Ca (OH) ₂ and HCl.

Extrusion of the mass creates an endless hose which, after drying and stabilization, most often by aldehyde substances, provides a suitable packaging for the production of sausages and cheeses. Efforts to replace a portion of the collagen pulp with other fiber based on synthetic or natural polymers have encountered technological difficulties in homogenizing that base mass. The formation of unwanted felt fibrous conglomerates was then prevented either by using pulp with a strongly limited fiber length, typically 3 mm, or by complex multi-stage homogenization in a high-turn device. .

The method of preparing the collagen foil with additional fiber according to the present invention enables the combination of the swollen base collagen fiber with natural or synthetic fiber with individual fiber lengths up to 10 mm using standard low-turn kneaders. The additional fibers used must be pretreated to form a dispersion in which the individual fibers are coated with a macromolecular gel to prevent them becoming fused.

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Hydrophilic polymers, such as cellulose derivatives, starch, gelatin, glue, polyvinyl alcohol and the like, which have been previously homogenized with the fibrous material at their liquefaction temperature, may be advantageously used for this purpose. After cooling of the homogenized mass, the resulting dispersion is suitable for use as a component to the swollen base collagen mass. Mutual homogenization of both components is performed in chilled kneaders.

The resulting mass is extruded, dried and stabilized in a standard manner with a solution of aldehydes. The process for preparing the collagen foil of the present invention is apparent from the following examples.

Example. 1

The bovine split glue is lysed for 8 weeks in a lime milk suspension, after which it is stripped of alkali with water and hydrochloric acid solution. This is followed by swelling in an aqueous hydrochloric acid solution and optionally scrubbing with excess HCl so that the final pH of the feedstock is in the range of 2.5 to 3.0.

The acid-swollen glue thus prepared is cut into pieces of 2 to 3 · 3 to 5 cm, crushed by pressure and then homogenized in a kneader with a second component, a cellulose fiber treated as follows:

000 kg water dispersion of cellulose with dry matter 5 wt. In a kneader equipped with a duplicator sheath, the mixture is mixed for 30 minutes with 225 kg of 96 wt. % and grain size 3 mm.

Then the entire contents of the kneader are heated to 40 ° C with continuous mixing. After all the glue had been transferred to the hydrosol, the temperature was maintained for a further 10 minutes, after which the kneader was cooled to a final batch temperature of 25 ° C while stirring.

The treated fiber is prepared for homogenization with the acid-swollen collagen mass.

1000 kg of the acidic swollen collagen mass and 200 kg of the prepared cellulose dispersion in the glue gel are homogenized in a kneader for 4 hours. The temperature of the resulting mass must not exceed 22 ° C when homogenized. After cooling to 10 ° C and mechanical filtration, an endless collagen foil hose is extruded, which is dried by flowing air at 60 ° C and stabilized by spraying with 0.7 wt.% Liquid. % glyoxal. The hose is suitable as a sausage and cheese cover. '

Example 2

The preparation is identical to Example 1, except that instead of dispersing the cellulose pulp, a viscose staple water dispersion having a maximum fiber length of 8 mm is prepared by dispersing 10 kg of viscose fibers in 90 kg of water.

Example 3

The preparation is the same as in Example 1, except that the ground cellulose pulp dispersion is mixed with the glue by a water dispersion of synthetic fiber staples (eg polyamide, polypropylene, polyester) with a fiber length of max. is dispersed in 90 kg of water.

He attaches

The preparation is convenient to Example 1, except that instead of dispersing the cellulose pulp, a water dispersion of cotton staple with a maximum fiber length of 10 mm prepared in such a way is dispersed with 10 g of staple in 90 kg of water.

Example 5

The preparation is identical to that of Example 1 except that one of the fibers listed in Examples 1 to 4 is used, the starch is ground and the kneader is heated to 95 ° C for 1 hour with continuous mixing.

Example 6

The preparation is identical to Example 1, except that some of the fibers listed in Examples 4 to 4 are used, the glue being ground and an acid-swollen collagen mass of 10% by weight. % in an amount of 1000 kg per 1000 kg of water pulp water dispersion and the contents are heated to 95 ° C for 1 hour with continuous mixing.

Example., 7

The preparation is identical to Example 6 except that polyvinyl alcohol, polyvinyl acetate, carboxymethylcellulose in an amount of 100 kg per 100 kg of water pulp water dispersion are used instead of the acid swollen collagen mass.

Claims (3)

PREFABRICATES 1. A process for producing a collagen foil from two components, characterized in that the components used are collagen materials having a pH of 2 to 3.5, and the second component is cellulose viscose, polyamide, polypropylene, polyester or cotton pulp dispersed in a binder starch gel. glue, collagen mass at pH 2-3, polyvinyl alcohol, polyvinyl acetate, carboxymethylcellulose. 2. A method according to claim 1, characterized in that the pulp used comprises fibers with a maximum distance of 10 mm. ·. 3. 211649 3. The process for producing collagen foil according to claim 1, characterized in that the binder gel polymer used forms a hydrosol when heated in water to a temperature of up to 100 [deg.] C, which converts into a gel when cooled to 25 [deg.] C.