RO98563B1 - Process for tanning skins for shoe faces - Google Patents

Abstract

Procedeul de tabacire a pieilor pentru fete încaltaminte, conform inventiei, permite obtinerea de piei moi cu caracter vegetal, în care scop, pielea gelatina spaltuita este tratata cu 2...4% sulfat de amoniu, se samaluieste cu 0,5...1,2% produs enzimatic, urmat de pielare-tabacire prin tratare cu 7...9% clorura de sodiu si 1...2% tiosulfat de sodiu timp de 20...40 min, se adauga 0,5...1,2% acid sulfuric, se agita timp de 100...140 min, se adauga 4...6% produs de retanare pe baza de amine si amide ale unor acizi aromatici, se agita timp de 160...200 min, se lasa în butoi pâna a doua zi, dupa care se tabacesc cu 1...2% ulei cationic, 5...7% tananti sintetici timp de 100...160 min, se adauga 1,3...1,7% Cr&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; de bazicitate 30... 40 degree Sch, se agita timp de 200...280 min, dupa carepieile se neutralizeaza cu 0,3...0,7% formiat de sodiu, 0,3...0,7% bicarbonat de sodiu si 1,5...3% tanant sintetic de neutralizare, urmat de ungere în 100...200% flota la 40...50 degree C, cu 2...4% uleiurisulfatate, 1...2% uleiuri sulfitate si minerale, si 0,5...1% ulei neutru, si finisate cu un strat incolor de lianti si o acoperire usoara cu un strat colorat cu coloranti transparenti, metal complecsi.The tanning process for footwear according to the invention allows the production of soft leather with a vegetable character, in which purpose the skin is treated with 2 ... 4% ammonium sulphate, it is sampled with 0.5 ... 1.2% of the enzymatic product, followed by quenching by treatment with 7 ... 9% sodium chloride and 1 ... 2% sodium thiosulfate for 20 ... 40 minutes, 0.5. .1% sulfuric acid, stir for 100-140 min, add 4-6% amine and amide-based retardant of some aromatic acids, stir for 160 ... 200 min, leave the barrel until the next day, then cook with 1 ... 2% of cationic oil, 5 ... 7% of synthetic tannins for 100 ... 160 minutes, add 1.3 ... 1.7% Cr <sub> 2 </ sub> O <sub> 3 </ sub> of a basicity of 30 ... 40 ° C Sch, stir for 200 ... 280 min, after which the particles are neutralized with 0.3 ... 0.7% sodium formate, 0.3 ... 0.7% sodium bicarbonate and 1,5 ... 3% synthetic neutralizing tanning, followed by lubrication in 100 ... 200% fleet at 40 ... 50 ° C, with 2 ... 4% sulfuric oil, 1 ... 2% sulphite and mineral oils, and 0.5 ... 1% neutral oil, and finished with a colorless coat of binders and a lightweight coating with a transparent coloring, complex metal coating.