SU947188A1 - Method for tunning skins for footwear bottom - Google Patents

Description

one

The invention relates to the leather industry and can be used for tanning leather.

The closest in technical essence and the achieved effect to the proposed method is the method of tanning leather, which includes treating the mole after pre-blasting operations with titanyl and ammonium sulfate and retardation of l.

The disadvantage of this method is the laboriousness of the process while achieving relatively low quality indicators of the properties of leathers such as welding temperature, density and durability of leathers.

The purpose of the invention is to intensify the tanning process, increase the volume output of leather and improve the quality of leather.

This goal is achieved by treating titol with ammonium and ammonium sulfate with an activator selected from the group consisting of condensed naphthalene, phthalic anhydride, aluminum alum, or their mixture with urotropine, titanyl sulfate and ammonium and syntans.

In this case, condensed naphthalene is used in the amount of 1.82, 5% by weight of .gol, phthalic anhydride - in the amount of 1.2-2.2% by weight of the mole, aluminum alum 10 1-3% by weight of the mole, aluminum alum in the mixture with urotropin - 1% by weight mole, titanyl sulfate and ammonium - 1-3% by weight mole {considering titanium dioxide),

15 mixture of syntans is used in the amount of 2 .0% by weight of the mole.

Claims (3)

Example 1. Desalted char, obtained from the raw material of cattle 20, is treated with condensed naphthalene in the amount of 1.8-2; 5% by weight of the mole at a liquid coefficient of 1.2 and a temperature of 23-2 ° C for 30 minutes Then the titanium tanning agent — titanium sulfate and ammonium sulfate in an amount by weight of a mole and ammonium sulfate in an amount of 6 by weight of a mole — is introduced into the same bath. The duration of tanning is 18–22 hours. Neutralization is carried out with sodium sulfite and hexamine 3.5 each before the pH of the semi-finished product, k-k, is reduced. Next, the semi-finished product is washed and subdivided with a mixture of synthans (synthetic tanning agents), injected in an amount of 172 by weight of the ashes (to be converted into dubbing), the retardation of the wire at a liquid ratio of 1.5, temperature for 2 days, so the initial pH of the solution should . be no lower than 0. To reduce ne formation during podblivanii, tanning paste or sulphonated bursted in an amount of 0.51 is introduced with a tanning agent at the same time. The semifinished product is then washed, drained, filled and greased. When filling, the following substances are used: magnesium sulphate or ammonium in amounts. E., Molasses. Fatting is performed in the usual way using solid synthetic fatty substances. Further processing of the semi-finished product is carried out by a known technology. PRI mme R 2. Depleted bedrock is treated with phthalic anhydride in the amount of 1.2-2.2i by weight of the mole at a liquid ratio of 1.2 to 23-26 ° C for 30 minutes. Further processing, as in example 1, Desalted char is treated with alum in an amount of 1-3% by weight of char. Further processing, as in example 1. Example. Deboned hide is treated with a mixture of aluminum alum and urotropin, taken in an amount of 3,. 0% by weight of a mole at a ratio of 1: 0.7. Further processing, as in example 1. PRI me R 5. Decontaminated geley is treated with titanyl and ammonium sulfate in an amount of 1-3 by weight a mole, considering titanium dioxide, in the presence of ammonium sulfate in an amount, by weight a mole with a liquid coefficient of 1, 2, temperature .3-2b ° C. Continue to-. treatment 4-6 m to complete prokras mol titanium, after which, in the same bath is introduced titanyl sulfate and ammonium in an amount - (% of the weight of the mole, including titanium dioxide. Duration of tanning 18-22 h. Further processing, as in Example 1. EXAMPLE 6 Chrome-plated semi-finished product is treated with synthetic tanning agents, for example, ATP tf 3, No. 1, in an amount of 2.5-5iO% by weight of char, with a liquid ratio of 1.2, temperature. Duration of treatment 3 h, after which the tanning is carried out as in example 1 .. The temperature of the welding of the semifinished product and The volume output of the leathers is given in Table 1. The application of the proposed method in production allows to increase the efficiency of the tanning process due to its acceleration and increase in the volume output of the leathers by 1-2 relative to the prototype, as well as to improve the quality of the leathers by increasing their density and durability. elasticity increases by 10,015, 0 MPa. In general, the economic effect of using this invention is 500-1000 rubles. on 1 million dm skins. Claim 1. Method for tanning skins for a low-buoy, including treating a mole after pre-blasting operations with titanyl and ammonium sulfate and retanning, characterized in that, in order to intensify the tanning process, increase the volume output of the leather and improve their quality, before treating titanyl and ammonium Golya is affected by an activator selected from the group consisting of condensed naphthalene, phthalic anhydride, aluminum, alum, or a mixture of them with urotropin, titanium sulphate and ammonium, and a mixture of syntans. 2. A method according to claim 1, characterized in that condensed naphthalene is used in an amount of 1.8-2.5% by weight mole. 3. The method according to claim 1, is also distinguished by the fact that phthalic angiid is used in an amount of 2-2.2 from the mass of a mole. 88 i. A method according to claim I, characterized in that aluminum alum is used in an amount of 1-3 mol by weight. 5. Method of pop, 1, characterized in THAT5 aluminum alum mixed with hexamine is used in an amount of 1.8-5.0% by weight of a mole at a ratio of 0.5: 3,. A method according to claim 1, characterized in that titanyl and ammonium sulfate is used in an amount of T-C) by weight of a mole, calculated on titanium dioxide. 7. The method according to claim 1, characterized in that the mixture of syntans is used in an amount of 2.5-5.0 by weight of the mole. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 233153 Cl. C li C 3/06, published. 1972 (prototype).