Preparation method of environment-friendly semi-vegetable tanning-metal tanning mould-proof light-resistant suede leather
A semi-vegetable tanning, environmentally friendly technology, applied in the field of suede leather, to achieve the effect of high leather yield, stiff body and less vacant parts
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Embodiment 1
[0038] Embodiment 1, the technical scheme that this embodiment mode adopts is:
[0039] A preparation method of an environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather, comprising the following steps in sequence:
[0040] Step 1: Add cow split hide, white tannin extract, Litobo GLH into the drum and rotate for 55 minutes, then add Davitan ZAT multi-metal tanning agent for retanning and rotate for 160 minutes, then add sodium formate and rotate for 15 minutes, then add NaHCO3 rotation for 25 minutes;
[0041] Step 2: add 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 syntan and rotate for 25 minutes, then check the second layer of cattle the state of the sk...
Embodiment 2
[0057] Embodiment 2, the technical scheme that this embodiment mode adopts is:
[0058] A preparation method of an environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather, comprising the following steps in sequence:
[0059] Step 1: Add cow split hide, white tannin extract, Litobo GLH into the drum and rotate for 60 minutes, then add Davitan ZAT multi-metal tanning agent for retanning and rotate for 180 minutes, then add sodium formate and rotate for 20 minutes, then add NaHCO3 rotation for 30 minutes;
[0060] Step 2: add alkali extracting agent again, adjust the pH to 4.0, rotate for 120 minutes, and discharge the solution in the drum after rotation;
[0061] Step 3: Add water at 25-35°C, add sodium formate, neutralize tannin and rotate for 30 minutes, then add ammonium bicarbonate and sodium bicarbonate and rotate for 60 minutes, then add syntan and rotate for 30 minutes, then check the cattle The skin state of the split skin...
Embodiment 3
[0076] Embodiment 3, the technical scheme that this embodiment mode adopts is:
[0077] A preparation method of an environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather, comprising the following steps in sequence:
[0078] Step 1: Add cow split hide, white tannin extract, Litobo GLH into the drum and rotate for 65 minutes, then add Davitan ZAT multi-metal tanning agent for retanning and rotate for 200 minutes, then add sodium formate and rotate for 25 minutes, then add NaHCO3 rotation for 35 minutes;
[0079] Step 2: add alkali extracting agent again, adjust the pH to 4.5, rotate for 140 minutes, discharge the solution in the drum after rotating;
[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 syntan and rotate for 35 minutes, then check the second layer of cattle the state of the skin; ...
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