SU41111A1 - A method of processing hrks hides with tanning them for the manufacture of lower-rush races - Google Patents

Description

The present method aims to manufacture lower-combat races from horses' skins. The novelty in the method is a sequence of a number of processes developed for hides, with which good results are obtained.

In the manufacture of leathers for the manufacture of races are intended skins of rats (not castrated males) weighing from 10 kg and above the wet-salted canning. Sorting of raw materials is carried out according to weight characteristics with a breakdown into two groups: I gr., 10-15 kg. II gr., 16 kg and above.

Formation of production batches is made by weight, depending on the capacity of the dishes of the leather plant and the observance of oil. to. methods.

From mock a. Selected batches of skins go to the drum for 1 hour on running water at a temperature of 18-20. After washing, the skins are poured onto fresh water at a temperature of 18-20 ° for 1 hour, after which the water is changed and the skins are reassembled. After 24 hours, the soaps are removed from the skins by removing the fat with a knife with a wrapped sting and they again come to fresh water for a period of 20-24 hours at a temperature of 18 - 20 °. Overall Successor (68)

nost soaked up to 48 hours. After watering, the bristles are pulled out by machines.

Gilding An ashpit is prepared containing:

Ma2S- 7 g in 1 liter CaO -10 g in 1 liter

1: 4, t-ra 20-22 °.

The duration of ashing is 5 days for bulkheads every other day, the content of MajS and CaO is maintained within the specified limits, for which laboratory monitoring is performed and the corresponding supports are made when the content of the indicated standards is lowered.

After 5 days of ashing, the bristle residues are upholstered and the gole goes to the second ashpit to clean lime at t-re 19-20 ° C and CaO content 10 g in 1 liter. The general term of ash is 9 days. The duration of ash is four days. At the end of the ashing process, the cinder is rinsed in a drum with water at t-19-20 ° for 40 minutes; The face is cleaned by a dead end on the deck and is determined by an ache weight.

Feistless Desolder is produced in a sodium bisulfite drum at a flow rate of the latter in an amount of 10 ° / o from the ache weight with a t-re of liquid 18-20. The duration of rotation

the drum is 14 hours, after which the hide remains in the liquid without movement for 8-10 hours.

Pickling. Decontaminated hideout is rinsed with water in a drum for 30 minutes at t = 18–20 ° and enters the drum at a pickle consisting of 6% hydrochloric acid, IS / o sodium chloride, and water.

The processing time is at least 24 hours while rotating the drum. The initial density of the solution is 15 Be, t-ra 18-20.

Hyposulphite bath. After being left for 24 hours, the kelp enters the drum for hyposulphite processing at a flow rate from the weight of a mole: 12 / g of hyposulphite and 3% salt is given up to a density of 27 Vyo (which roughly gives x. 0.5 per weight mole ). The processing time is 24 hours when the drum rotates for 18 hours.

The temperature of the hyposulfite bath is 18-20 °.

After processing in the specified bath and the bedding for 24 hours, the foot is fed to the chrome preparation.

The preparation of chromium salts is carried out in the drum with the well. v. 1: 1 and t-20-22. Consumption 0208-0.70 / 0 and salt by weight a mole; the duration of tanning is 24 hours when the drum rotates for at least 20 hours. The initial basicity of the liquid 36 according to Shoremmer, after 1 hour, the determination of basicity is made and when it falls, by adding soda, the basicity rises to 40; The basicity is monitored several times so that the chrome tanning process is completed with a basicity in the range 36-38 according to Shorlemeruem.

Preparation of chromic extract. Per 100 kg of chromic is given 133.3 ° sulfuric acid with a density of 66 ° Be. This ratio gives a basicity of 0. When a higher basicity is obtained, the acid is taken correspondingly less. If it is desired to obtain a basicity of 40, th X 133.3 - 40, 93.3 kg of acid per 100 kg of chromicum (in the presence of weaker sulfuric acid, an appropriate conversion is made).

To restore, glucose is taken in the amount of 30% by weight of chromium or glucose 15% of hyposulfite.

The lead lined tank is given a chromate peak, which dissolves in 2.5 parts of hot water. After dissolution, with t-re not exceeding 70-80 °, sulfuric acid is added with constant stirring, after which the reducing agent is given, glucose, then hyposulfite is added with continuous stirring for 2 hours.

After the chromium preparation, the cake is allowed for 24 hours. This is followed by rinsing for 20 minutes. in the drum at t-re 18-20

Good results give tanning extract with. c. “Rmsok” brands with consumption of dubbing in the range of 16.5% by weight a gol in the system of two juices. First, the semi-finished product enters the juice from the previous batch, the juice density is 13-15 ° B, where it rotates for 1 day, after which the juice is drained as used in the sewage system, and the descaler is produced on a fresh extract with a density of 19 ° B. The goal of tanning on waste juice is to dispose of unused tanning agents.

Per 100 kg, the power consumption of the dubious s. c. is 16.5 kg with a juice density of 19 ° Be.

In 1 liter-degree, there are 6 g of tanning, hence, at an extract density of 19 ° Vy, the content of tanning in 1 liter is 19.6 114 g and at a flow rate of 16.5 kg of tanning s. c. we find the liquid coefficient of 16,500: 144 145 liters of liquid in 19 Vyo per 100 kg gol.

The period of tanning on the second (fresh) juice is from 48 to 72 hours, depending on the weight and thickness of the mole, the juice is natural, within 4. At a pH value below 4, it is necessary to alkaline by adding ammonia. At the specified well. K. It is possible to warm the fluid, which should not be allowed above 30 ° C, and it is necessary to stop the rotation of the drum.

After complete blowing, the skin is allowed to bed for 36 hours, followed by rinsing in a drum for 2 hours in water with a well. v. 1: 4 and a temperature of 20 -22 °. The washed skin comes in for pressing with a press or on a basement and then the skin goes for fattening.

The fat blend is composed of 50% fatty fat, 20% paraffin wax, 30 "mineral oil / mixture is heated to 40% and the skin is smeared from the face of the bakhtarma. The total consumption of fat mixture - 8% by weight of the finished product. Lubrication is carried out over the entire area with the exception of thin and loose places (floor).

After bedding for 12 hours. the skin is exposed to a wash in the drum for 1.5 hours while blowing air heated to 40 ° C. The burned skins are allowed to lay for 12 hours, after which they are dried at a temperature of 25-30 ° for 36-40 hours. Dried skin to a moisture content of 8-10% come to the washing with brushes from the front side. Rinsing is done on the tables with water heated to 45-50, and the skins are finally dried.

After the skin is soaked, it is slightly soaked with water and left in the drum for 30 minutes, after which it is delivered to the warehouse.

Subject and zobr.te NI.

A method of processing hrkah pelts with tanning them for making lower felling races, characterized in that wet-salted skins are subjected to soaking for about two days, removing fat in the middle of this process, then, after removing the bristles, they put zolka first in a bath containing lime and sodium sulphide, then in the second bath, from one lime, after the ash, the char is subjected to desalting with sodium bisulphite, taken in an amount of about lOVo by weight of the char, and sprinkled with a solution of hydrochloric acid and table salt, then sodium hyposulfite, oak m chrome or other tanning extract and the mixture was zhiruyut mezdrovogo fat, paraffin and mineral oil.