Cellulose food casing

FIELD: food processing industry, cellulose food casings, in particular pigmented tubular cellulose casings and method for production thereof.

SUBSTANCE: according to the present method pigment based on perylene tetracarboxylic acid in combination with at least one additional pigment are introduced in viscose before extrusion through nozzle to produce casing. Obtained casing after filling with foodstuff appears as natural smoked product with redwood color. Additional pigment is selected from group containing β-phthalocyanine, diazo and monoazo pigments. Pigmented cellulose casing includes 0.4-4 mass %, preferably 1-2 mass % of perylene tetracarboxylic acid.

EFFECT: pigmented cellulose casing which doesn't discolor under microorganism action in vacuum package.

7 cl, 3 ex, 1 tbl

 

The present invention relates to cellulosic casings for food products and, more specifically, to a transparent pigmented tubular cellulosic casings for food products and method of their manufacture.

Cellulose casings are widely used in the food industry, especially in the meat industry, in products gasket, such as frankfurters and the like, and they often cover different substances, or they contain substances included in the shell. Cellulose casings are supplied in the form of products of great length, folded in a highly compressed corrugations, forming a rigid pipe, obtained from regenerated cellulose and containing plasticizers, such as water and/or polyhydric alcohol, such as glycerin. The pulp used for the manufacture of shells, usually receive a so-called "viscose process", where the viscose soluble derivative of cellulose, ekstragiruyut as having a tubular shape of the film through an annular die plate in a coagulating and regenerating bath to obtain a tubular articles made of regenerated cellulose.

In the viscose method" of natural cellulose is treated with caustic solution to activate the cellulose that was her derivatization and extraction of certain alkali-soluble fractions of natural cell the vine. The obtained alkali cellulose is shredded subjected to aging and treated with carbon disulfide to obtain xanthate sodium-cellulose, which is then dissolved in a weak alkaline solution. The viscose solution is aged, filtered, dearyou and ekstragiruyut.

Wrappers for food products made from derivateservlet cellulose, usually contain additives such as dyes introduced into the shell or printed on it. Liquid smoke additives, which impart a smoky flavor and a reddish color foods, can also be included in the shell or drawn on it.

From U.S. patent US-4336828 known reinforced fibers of the tubular shell, painted metallic luster, and the method of their manufacture. In the manufacture of reinforced fibers tubular shells, mother-of-pearl-shiny flaky pigment, which preferably consists mostly of titanium dioxide-silver or gold or copper pigment based on mica, mixed with an alkaline solution of a commercial cellulose xanthate and reinforced long fiber paper substrate is subjected to a contact and impregnate the mixture, and then applied the mixture Ammergau" on the specified substrate. From U.S. patent N known cellulose casing for food products derived from noderivatives the Zell is eskers and N-methylmorpholin-N-oxide, where the coloring agents such as red, blue and yellow dyes, you can enter into the solution of the cellulose prior to extrusion through the die plate. In the patent DE 3543633 disclosed shell for raw sausages, made of reinforced regenerated cellulose fibers having a tubular shape, the inner surface of which is covered with a water-insoluble cationic resin. The external surface of the tubular cellulose casing contains 8-20% of a pigment, and only a small amount of pigment is present on the inner pulp surface.

Shells use different colors, and usually pigments injected into the pulp before extrusion. Traditionally used red of various shades of red, such as a reddish-brown color, well-smoked product and special color mahogany shells are usually obtained using a special painting technology kovovymi dyes, based on, for example, on Industrieweg group of dyes (these dyes produced by Dyestar Company). Staining of membranes perform injectionem dye or pigment in the viscose, and then mixing with obtaining a good dispersion of the dye and viscose with subsequent impregnation of the substrate is a paper substrate fibrous sheath, and then coagulogram mixture or in the paper, with subsequent regeneration. After CE is lulose regenerate by means of baths, containing diluted sulfuric acid together with the sulfate salts of ammonium and sodium membrane in the form of aligned tubular products missing in restoring the alkaline bath hydrosulfite sodium, which facilitates the movement of soluble dye between the swollen cellulose molecules or chains of cellulose. Thereafter, the tubular product is passed in an oxidizing bath with alkaline peroxide, which gives the effect of recrystallization Industrieweg dye captured between adjacent cellulose chains, and, finally, the process is completed neutralizing bath with sulfuric acid, closing the cellulose chain, which swelled under the action of alkali, which prevents migration. This provides a highly translucent or transparent membrane, having a reddish color or the color of mahogany, which gives the product the desired smoked.

Also use other pigments to obtain colors or shades other than red wood, such as red, brown, white pigments, the pigments with metallic luster, black, blue, green, yellow, orange pigments, many of which are used either separately or in mixture. However, in comparison with shades attached indanthrene dyes and other kovovymi dyes, shell, obtained using the quiet pigments, usually get dull and opaque.

Widely used painting technology kovovymi dyes has some serious flaws. With this technology requires additional processing stage, i.e. recovery using hydrosulfite baths, oxidation using peroxide baths and neutralization using an acid bath. Additional baths contain up to 25 g/l of sodium hydroxide and from 5 to 35 g/l of dithionite sodium, which is used at a temperature of from 25 to 55°that has the effect of turning indanthrene dyes in their restored soluble form, after which you must either several rinsing baths, the latter of which may include the stage of neutralization of the acid with the use of about 10 to 60 g/l of sulfuric acid and temperature from 15 to 65°With their inverse transformations in crystalline oxidized form, or more washing baths also containing from 2 to 20 g/l of diluted sodium peroxide at a temperature of from 15 to 45°promoting reverse transformation in the oxidized form, to use the stage of neutralization, as described above. Such last mentioned bath may contain highly corrosive chemicals that cause weakening of the cellulose structure of shells. When using such baths, besides the fact that their is uderzenie with constant replenishment of chemicals and hot water, as well as their mechanical maintenance is expensive, requires additional space, and the thus treated product shell is mechanically weaker compared with its counterpart obtained in a manner different from painting kovovymi dyes, due to the absence of such chemical interactions. In addition, due to the use of multiple baths containing a large number of chemicals that are formed environmentally undesirable waste chemical solutions.

Chemical recovery in some cases was problematic when using indanthrene dyes when they are not properly bound to the membrane, i.e. between adjacent cellulose chains in the wall of the shell. The phenomenon of recovery may occur in colored kovovymi dyes membranes that contain meat emulsion, such as summer sausages beef, known as the Balkan sausages. Sausages often have vacuum packaging for long term storage, up to 12 months, and microorganisms such as bacteria that are often present in greater or lesser degree in such products, begin to chemically interact and affect the degree of oxidation of the dye. In many cases, changing the degree of oxidation is accompanied by a color change. The oxidation Krasnov is the brown color is dark green color restored form, that may be complaining that the product was formed black streaks and so he is infected.

As you can see, there is a need for an improved method of manufacturing a pigmented cellulose casings, in particular, having the color of red wood cellulose casings.

The technical task of the present invention is to provide a method of manufacturing a pigmented cellulose casings, in particular, having the color of red wood cellulose casings, as well as providing a pigmented cellulose casings, in particular, having the color of red wood cellulose membranes obtained in this way which is not susceptible to discoloration under the action of microorganisms in vacuum packaging.

Additionally, the present invention is to achieve a good appearance and aesthetic qualities of cellulose membranes with mahogany derived from Industrieweg type dyes, without processing stages required for painting technology kovovymi dyes.

The next task of the present invention is the elimination or significant reduction of the disadvantages of the known technology of painting and the transition to a more environmentally attractive way.

These problems are solved due to the fact that in the method of manufacturing the PI is montirovannoj cellulose casings, which at stuffing her food gives him the appearance of naturally smoked product, the product having a color of mahogany, wine red, or any shade of red, providing for the extrusion of viscose with the formation of the shell, which is coagulated, then using an acid solution, viscose shell regenerate the cellulose, washed her and plastificator, according to the invention in the viscose prior to extrusion through the die plate is injected diluted in water a mixture of 0.4-4 wt.% pigment-based fixed tetracarbonyl acid with pigments selected from the group consisting of β-phthalocyanine, diazo and moneysupermarket, and the number β-phthalocyanine is 0.01-3.0 wt.% and the total amount of diazo and/or monoazetta is 0.03 to 2 wt.% calculated on the dry weight of the shell.

Preferably the amount of pigment on the basis of fixed tetracarbonyl acid is 1.0-2.0 wt.% calculated on the dry weight of the shell.

Preferably the membrane is a fibrous sheath.

The task is also solved due to the fact that pigmented cellulose membrane made of regenerated cellulose and gives the product a kind of naturally smoked product, the product having a color of mahogany, wine red, or any shade of red, according to the invention comprises 0.4 to 4 wt.% the pig is UNT on the basis of fixed tetracarbonyl acid and additional pigments, selected from the group consisting of β-phthalocyanine, diazo and moneysupermarket, and the number β-phthalocyanine is 0.01-3.0 wt.% and the total amount of diazo and/or monoazetta is 0.03 to 2 wt.% calculated on the dry weight of the shell.

Preferably pigmented cellulose membrane contains 1.0 to 2.0 wt.% pigment-based fixed tetracarbonyl acid.

Preferably pigmented cellulose membrane is a fibrous sheath.

Pigmented cellulose membrane, when she stuffed food products, preferably summer sosisochnykh meat, may have the appearance and aesthetic quality of the shell, obtained on the basis of indanthrene paint systems.

Suitable for use pigments are fixed tetracarbonyl acid (Hostafine®Red P2GL LP, color index, P.R. 179), β-phthalocyanine (Hostafine®Blau B26; RV 15:3), diazo (Hostafine®Gelb HR, P.Y. 102), monoazo (Viscofil®yellow RL, P.Y. 102), all from the company Clariant GmbH. These pigments are a liquid suspension, which is mixed with water in any ratio. Shells use 0.4 to 4 wt.%, preferably 1-2 wt.% fixed tetracarbonyl acid in a mixture with other pigments, preferably from 0.01 to 0.3 wt.% β-phthalocyanine and/or 0.3 to 2.6 wt.% diazo and/or moneysupermarket based on the weight of suhag the product to modify the color of the shell and to obtain a replacement color, such as yellow, blue, mahogany, Burgundy wine color and the natural color of smoked product that had previously been using VAT dyes, such as indanthrene dyes.

In the method according to the present invention, pigments/dyes, or weigh or measure the volume and then diluted with water, or in small parties, viscose, preparation for injection into the main supply line viscose before passing it through the die plate for extruding the sheath. After the initial stages of manufacturing cellulose membranes: coagulation, regeneration and rinsing, you only need rinsing pigmented shells and end plasticization. Coagulation followed by extrusion containing the pigment/dye viscose, in a paper substrate and treated with a solution of dilute sulfuric acid containing 40-80 g/l of ammonium sulfate and 150-250 g/l of sodium sulfate, when formed from cellulose-pigment/dye gel adhesion to the paper substrate. This is followed by regeneration of the sodium cellulose xanthate viscose into cellulose using the above-mentioned acid solution, undergoes a gradual dilution and temperature increase from 20 to 35°With up to 35-65°when passing through approximately 5-15 baths. The plasticization in the tub with a polyhydric alcohol to obtain a membrane, for example with the holding of glycerol from 15 to 25%, is the ultimate wet process before drying the so-called "plain wrapper". Finishing a stage of "sticking to the meat" or "easily detachable shell" can also be applied after plasticization stage before drying, but they are optional.

To obtain viscose front of the stage viscose-pigment impregnation above, the wood pulp is suspended in a solution of sodium hydroxide with subsequent removal of excess liquor to obtain a composition of sodium-cellulose. In the form of pressed cakes served in the cage, and in powdered form so-called alkali cellulose are oxidized. Oxidized thus alkaline pulp fed into the reactor xanthinuria, introducing liquid carbon disulfide and the reaction allowed to reach completion with the formation of the first xanthate cellulose to dissolve in sodium hydroxide solution. Formed in this way xanthate sodium-cellulose is metastable and first undergoes a thermodynamic rearrangement, in which randomly substituted hydroxyl group glycosidic links that make up the molecules of cellulose are more correctly between adjacent hydroxyl groups glycosidic links, in the course of this process there is a decrease in the viscosity of the viscose. At the same time, the molecule also starts decant generosity, i.e. some groups xanthate disulfide carbon from the molecules, which leads to increased viscosity and in the end, if you give to continue the process of gelatinization. For the fibrous sheath in the course of the last processes viscose is filtered to remove any unreacted fibers and the degree of substitution control. Viscose ekstragiruyut the paper substrate membrane in a pre-established indicator of exposure.

Advantages of the method and pigmented fibrous cellulose membranes according to the present invention are as follows. The method of coloring kovovymi dyes is time-consuming, and, thus, it is possible to avoid additional chemical treatments with the use of highly corrosive chemicals, such as recovery using hydrosulfite baths, oxidation using peroxide baths and neutralization using an acid bath. Shell and the manufacture method of the present invention are environmentally more attractive and mechanically more durable because of their processing and uses fewer chemicals. The method according to the present invention provides colors that are not subject to chemical recovery or discoloration under the action of microorganisms in vacuum packaging. Because mostly fibrous casings are not sold is painted, most vehicles made to obtain membranes not containing baths for dyeing kovovymi dyes required to obtain colored shells that is the lack of flexibility in production. The method of obtaining pigmented membranes of the present invention does not require baths for dyeing kovovymi dyes, resulting in significant time savings for their manufacture and delivery.

Further, the invention is illustrated in the following examples, which, however, are not intended to limit its scope.

Examples 1-3

Three pigmented fibrous membranes were obtained using different amounts of pigments. Their composition is given in Table 1 below.

Table 1
Number example123
Paper length, m100010001000
Paper width, m1,240,1241,58
Paper weight, kg/m20,0170,0170,021
Paper weight kg/1000 m2,1082,1083,318
Obolo the ka, weight kg/1000 m7,87,8to 12.0
Glycerin content, %222222
Weight of glycerin, kg/1000 m1,7161,7162,64
Water content, %5,05,05,0
The weight of water, kg/1000 m0,390,390,50
Weight viscose, kg/1000 m46,846,873,6
Cellulose content,%7,27,27,2
The weight of the pulp, kg/1000 m3,373,37and 5.30
Pigments:
Hostafine*Rot P2GL, kg/1000 m0,3710,3850,429
The dry matter content, %353535
Dry weight kg/1000 m0,130is 0.1350,150
The number in the shell %1,71,71,3
 /td>
Hostafine* Gelb HR*kg/1000 m0,1690,161no
The dry matter content, %4343-
Dry weight kg/1000 m0,0730,069-
The number in the shell %0,90,9-
Viscofil* Yellow RLnono0,810
The dry matter content, %--20
Dry weight kg/1000 m--rate 0.162
The number in the shell %1,4
Hostafine* Blue B2G0,0170,0060,011
The dry matter content, %484848
Dry weight kg/1000 m0,0080,0030,005
The number in the shell %0,10,040,04
Wrapper SCAN-P8:93 external surface%93,791,792,9
Opacity (ISO 2471) inner surface, %96,596,2for 95.3
Sheath colormahoganymahoganymahogany
Note*: "Hostafine" and "Viscofil" are registered trademarks of the company CLARIANT GMBH.

1. A method of manufacturing a pigmented cellulose casings, which at stuffing her food gives him the appearance of naturally smoked product, the product having a color of mahogany, wine red, or any shade of red, providing for the extrusion of viscose with the formation of the shell, which is coagulated, then using an acid solution, viscose shell regenerate the cellulose, washed her and plastificator, characterized in that the viscose prior to extrusion through the die plate is injected diluted in water a mixture of 0.4-4 wt.% pigment-based perylenetetracarboxylic acid with pigments selected from the group consisting of β-phthalocyanine, diazo and moneysupermarket, and the number β-phthalocyanine is 0.01-30 wt.% and the total amount of diazo and/or monoazetta is 0.03 to 2 wt.% calculated on the dry weight of the shell.

2. The method according to claim 1, characterized in that the amount of pigment based perylenetetracarboxylic acid is 1.0-2.0 wt.% calculated on the dry weight of the shell.

3. The method according to claim 1 or 2, characterized in that the membrane is a fibrous sheath.

4. Pigmented cellulose membrane made of regenerated cellulose and gives the product a kind of naturally smoked product, the product having a color of mahogany, wine red, or any shade of red, characterized in that it comprises 0.4 to 4 wt.% pigment-based perylenetetracarboxylic acid and more pigments selected from the group consisting of β-phthalocyanine, diazo and moneysupermarket, and the number β-phthalocyanine is 0.01-3.0 wt.% and the total amount of diazo and/or monoazetta is 0.03 to 2 wt.% calculated on the dry weight of the shell.

5. Pigmented cellulose membrane according to claim 4, characterized in that it contains from 1.0 to 2.0 wt.% pigment-based perylenetetracarboxylic acid.

6. Pigmented cellulose membrane according to claim 4 or 5, characterized in that the membrane is a fibrous sheath.

7. Pigmented cellulose membrane according to claim 6, characterized in that the shell, when she stuffed food products, preferably summer sosisochnykh meat, has the appearance and aesthetic quality of the glasses, obtained on the basis of indanthrene paint systems.



 

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