SU62650A1 - The method of tanning pork skins - Google Patents

Description

From the LEATHER, going for the dressing of saddlery and saddlery, both good quality and good natural even color as possible of light shades over the entire skin area are required, which cannot be obtained with high-speed tanning of Russian leather and semi-shaft with oak extract.

The proposed method relates to the tanning of pork skins, in particular for the saddle-saddle Russian and semi-shaft, with the use of syntans and spruce extract for this purpose.

In toto from the known methods, before processing with a mixture of syntan and spruce extract, the tolier is subdued with bestan N.

With the help of the proposed method, with high-speed drum tanning (48-60 hours), the skin is obtained of a light brown beautiful color with sufficient density and good elasticity, with a tensile strength close to the standard (2.08-2.17), while Russian and poluval, produced at the plants according to the existing method with the use of oak and willow extracts, give the skin with a resistance value of rupture not higher than 1.8 kg1cm-,

Both yuft and sad-saddle halfs, produced according to the indicated method, by their qualities fully satisfy the norms.

Below is an exemplary description of tanning according to the proposed method.

1. Pile after pickle is treated for 8 hours in a solution of Bestana N; solution temperature 22 °, liquid coefficient 2-2.5. Consumption Bestan 30-35% by weight of the mole. Procrass putt in a tank without a bath - through.

2. After the non-flowing undercoat, the cinder is washed in two waters at a temperature of 35 ° for 45-60 minutes, JK. - 3. Then the cinder is neutralized by hyposulfite (2% by weight a mole) for 60-90 minutes at a temperature of 35 °, K. - 3, and again washed for 25 minutes at a temperature of 35 °.

3.1- The tanning stage is produced by fir fir. A used 2-phase from the previous batch is poured into the drum. G. K. - 3.5, temperature 22 °, TH content from 12 g / l at pH 4.7-4.6; the drum rotation time is 8-12 hours (prokras 90-100%).

No. 62650-2 -

The spent 1 phase is drained to the sewer.

4.2-stage tanning spruce TN. The 2nd phase is the 3-waste phase from the previous batch, J. K. - 3-3,2; TH for yufti, for the half-vale is 22-25 g / l at pH 4.5-4.4; temperature 25-26 °, rotation time 12 h.

5.3-phase is prepared from the extract. Temperature 27-30 °, J.-K. 3- 3.2; the amount of TH for a Russian is 24–25 g / l, for a semi-shaft 36–40 g / l; rotation time 24 hours.

6. Bathed skins lie on the trestle for 24 hours and are washed in a vat with water at a temperature of 35-40 ° for 12 hours. J. K - 2, and then rinsed in a drum at J. K. - 3 but 45 minutes.

7. Payment in maschine. The skins are skinned and fattened in a drum for 60 minutes at a temperature of 40 °. The composition of the fat mixture: technical fat - 60%, seal fat - 30%, sulfonated blubber - 10%. The total fat consumption is 7-6% of the planed weight.

8. Drying and finishing - the usual.

9. Preparation of the extract. Spruce extract is boiled in a mixture of e- 10% anthracene K, the time of cooking 10-12 hours, the pH of the boiled extract at a temperature of 12 °, Be - 4.2-4.1; insoluble 2-4%.

Subject invention

Claims (2)

1. A method of tanning pigskins, for example, for a black-haired yoke and semi-shaft with the use of synthans and spruce extract, characterized in that prior to processing with a mixture of syntan and spruce extract, the leg of the scythe is subdued by bestan N. 2. A method according to claim 1, characterized in that the tanning is carried out with a mixture of spruce extract and anthracene K, boiled together.