DE1145003B - Process for hardening artificial casings for smoked products made up of proteins - Google Patents

Description

In the production of artificial casings for smoked products on the basis of proteins has been usually proceed in such a way that the shredded, homogenized and swollen protein-like mass is deformed and then air-dried in the form of a spiral in the inflated state. After that, the puffed casing with a suitable sawdust obtained by wet distillation or smoldering and still diluted solution sprayed. The casing produced in this way is dried and longer Time, e.g. B. stored for a month to achieve full hardening.

The known method has several technical disadvantages. So the shell has to be sprayed several times and are dried in between, making the entire manufacturing process proportionate takes a lot of time. Furthermore, the known method requires a large air flow to a to ensure complete drying of the shell, which makes manufacturing cumbersome. An increase in price also occurs because the distillate obtained from sawdust is a waste product of the hardening process cannot be used for any other purpose.

There are therefore already other hardening substances for the production of synthetic casings from protein substances used, e.g. B. glyoxal. The use of this hardening substance requires a proportionate high curing temperature (65 to 120 ° C), which adversely affects the quality of the synthetic casing, because the shrinkage temperature of the collagen is around 60 ° C.

According to another known method, keto groups are used to harden the synthetic casings Phenols used. The disadvantage here was that these substances during curing have bothersome side effects. So they cause a decrease in the shrinkage temperature of the Collagen. Furthermore, the polyhydric phenols (resorcinol pyrogallol, hydroquinone) cause an undesirable effect Coloring of the shell, suggesting the presence of iron and signs of oxidation is due. The unwanted coloration can also not be achieved by adding reducing agents Substances or complex-forming compounds such as chelates are eliminated.

Some other known hardening agents for synthetic sleeves, e.g. B. eugenol, coniferyl alcohol, can relatively difficult to handle in the manufacture of the artificial sleeves and are also relatively expensive. Further toxic side effects when using these substances cannot be ruled out.

Method of hardening

Artificial casings for smoked products based on proteins

Applicant:
Cutisin vyroba umelych stfev,

närodni podnik, Kofenov,

and Dr. Vladimir Jancik, Rubensova

(Czechoslovakia)

Representative: Dipl.-Ing. A. Spreer, patent attorney,
Göttingen, Groner Str. 37

Claimed priority:
Czechoslovakia from October 24, 1958 (No. 5366)

Dr. Vladimir Jancik, Rubensova (Czechoslovakia), has been named as the inventor

The hardening process according to the invention for synthetic casings constructed on the basis of proteins for the reception of smoked goods does not have the aforementioned technical deficiencies. Beats in detail the invention proposes that as hardening substances, aliphatic aldehyde ketones (ketone aldehyde), preferably Pyruvic aldehyde (propanonal) can be used. The peculiarity of these connections is that they have both a ketone and an aldehyde group in a single molecule exhibit. The good hardening action of these compounds is surprising in and of itself, as it is known In contrast to aldehyde groups, keto groups have no hardening effect. So is for example Acetone completely inactive with regard to a hardening effect on artificial casings.

Relatively small amounts of the aldehyde ketones used according to the invention are sufficient to achieve satisfactory curing results. In general, less than 1% of these compounds, based on the dry substance of the proteinaceous mass, are used.
A particular advantage of the hardening substances proposed by the invention, in particular pyruvic aldehyde, is that they are products of biochemical and biological processes,

309 538/236

ζ. B. fermentation and therefore completely harmless with regard to any toxic side effects are.

The obtained by the process according to the invention Artificial casings also have excellent tensile and flexural strength and durability when cooking. Another advantage is that the casings are impermeable to water vapor in particular and have good adhesion to the product. Furthermore, the light or brownish yellow The color of the synthetic sleeves produced according to the invention is favorable with regard to their intended use.

The properties of the synthetic sleeves can thereby be further improved in an embodiment of the invention that the casings after shaping to a temperature below the shrinkage temperature of the collagen are heated. The treatment temperatures are generally between 30 and 55 ° C. The use of such low refining temperatures is possible due to the high effectiveness of the aliphatic aldehyde ketones used according to the invention. This will Damage to the structure of the collagen fibers is excluded, with the use of higher Calculated temperatures in the range or above the shrinkage temperature of the collagen must become.

example 1

0.95% pyruvic aldehyde becomes a frayed, acid-swollen, glue-like mass, based on the dry weight of the proteinaceous mass, added, after which the mass in an is further processed in a known manner. The drawn out cohesive tube of the artificial envelope is first dried in a stream of air and then for 10 hours to a temperature of Heated to 55 ° C.

Example 2

40

A fiberized, acid-swollen glue-like mass becomes 1.2% acetoacetic aldehyde and 0.02% paraffin oil, based on the dry substance of the protein-like mass, was added. The crowd is then further processed in a manner known per se. After drying the extracted With the hose of the artificial cover, it is heated for 8 to hours at a temperature of 55 ° C. The implementation of the method according to the invention, as far as the product manufactured thereafter is not intended for delivery to areas outside the scope of the Food Act currently on the basis of the "Ordinance on Meat and Meat Products (Meat Ordinance)" of December 19, 1959 (Federal Law Gazette Part I, No. 52 of December 22, 1959, p. 726) especially § 1, paragraph 1, item 8 not permitted.

Claims (4)

PATENT CLAIMS: 1. A method for hardening artificial casings for smoked products made up of proteins, the hardening agent being added to the shredded protein-like mass, which is then brought into the desired shape, characterized in that aliphatic aldehyde ketones (ketone aldehyde), preferably pyruvic aldehyde , are used as hardening substances. be used. 2. The method according to claim 1, characterized in that the amount of hardening substances is about 1%, based on the dry protein-containing mass. 3. The method according to one or both of the preceding claims, characterized in, that the artificial shell obtained during the shaping by heating at a temperature below that Shrinkage temperature of the collagen is refined. 4. The method according to claim 3, characterized in that the. Refining temperature is between 30 and 50 ° C. Considered publications:
German Patent No. 972,854;
German interpretative document No. 1 032 076. © 309 538/236 2.63