A kind of preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof light-resistant suede leather
A semi-vegetable tanning and environmentally friendly technology, applied in the field of suede leather, to achieve the effect of tight leather surface, fine suede surface, and reduced empty parts
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Embodiment 1
[0038] Embodiment 1, the technical scheme adopted by this specific embodiment is:
[0039] A preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather comprises the following steps in sequence:
[0040] Step 1: Add bovine bilayer hide, white tannin extract and Litopo GLH to the drum and rotate for 55 minutes, then add Dawitan ZAT polymetallic tanning agent for retanning and rotate for 160 minutes, then add sodium formate and rotate for 15 minutes, then add Sodium bicarbonate turns for 25 minutes;
[0041] Step 2: Add the alkali-extracting agent again, adjust the pH to 3.5, rotate for 100 minutes, and discharge the solution in the drum after rotating;
[0042] Step 3: Add water at 25°C, add sodium formate, neutralize tannin and rotate for 25 minutes, then add ammonium bicarbonate and sodium bicarbonate and rotate for 55 minutes, then add synthetic tanning agent and rotate for 25 minutes, then check the second lay...
Embodiment 2
[0057] Embodiment 2, the technical scheme adopted in this specific embodiment is:
[0058] A preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather comprises the following steps in sequence:
[0059] Step 1: Add bovine bilayer hide, white tannin extract, Litopo GLH to the drum and rotate for 60 minutes, then add Dawitan ZAT polymetallic tanning agent for retanning and rotate for 180 minutes, then add sodium formate and rotate for 20 minutes, then add Sodium bicarbonate for 30 minutes;
[0060] Step 2: Add the alkali-extracting agent again, adjust the pH to 4.0, rotate for 120 minutes, and discharge the solution in the drum after the rotation;
[0061] Step 3: Add water at 25-35°C, add sodium formate, neutralize tannin and turn for 30 minutes, then add ammonium bicarbonate and sodium bicarbonate and turn for 60 minutes, then add synthetic tanning agent and turn for 30 minutes, then check the cow The state o...
Embodiment 3
[0076] Embodiment 3, the technical scheme adopted by this specific embodiment is:
[0077] A preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather comprises the following steps in sequence:
[0078] Step 1: Add bovine bilayer hide, white tannin extract, Litopo GLH to the drum and rotate for 65 minutes, then add Dawitan ZAT polymetallic tanning agent for retanning and rotate for 200 minutes, then add sodium formate and rotate for 25 minutes, then add Sodium bicarbonate turns for 35 minutes;
[0079] Step 2: add the alkali extraction agent again, adjust the pH to 4.5, rotate for 140 minutes, and discharge the solution in the drum after the rotation;
[0080] Step 3: Add water at 35°C, add sodium formate, neutralize tannin and rotate for 35 minutes, then add ammonium bicarbonate and sodium bicarbonate and rotate for 65 minutes, then add synthetic tanning agent and rotate for 35 minutes, then check the second ...
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