A kind of manufacturing method of durable antibacterial and antibacterial leather
A manufacturing method and leather technology, which are applied in leather impregnation, leather surface treatment, small raw hide/large raw hide/leather/fur treatment, etc., can solve the problem that chitosan quaternary ammonium salts are prone to migration, cannot maintain antibacterial and bacteriostatic effects, and Problems such as poor washing resistance, to achieve the effect of improving comprehensive utilization value, improving color saturation and fastness of dyeing, and lasting antibacterial properties
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Embodiment 1
[0027] pre-tanning process
[0028] Pickling and pre-tanning: After 100Kg of goat alkali leather has been delimed and softened, add 80Kg of normal temperature water, add 8Kg of industrial salt, and rotate for 10 minutes; add 0.5Kg of formic acid (concentration 85%) diluted with 5Kg of water in advance, and rotate for 10 minutes; Add 0.4Kg sulfuric acid (98%) diluted with 8Kg water and rotate for 20 minutes; then add 0.4Kg sulfuric acid (98%) diluted with 8Kg water and rotate for 20 minutes; add 0.4Kg sulfuric acid (98%) diluted with 8Kg water and rotate 120 minutes; add 2Kg of oxidized N, N, N-trimethyl chitosan quaternary ammonium salt with an oxidation degree of 60%, and rotate for 90 minutes; stop the drum overnight, and rotate for 5 minutes every 120 minutes, before the end of pickling the next day Turn for 30 minutes;
[0029] Chrome tanning: Add 7Kg of chrome powder with an alkalinity of 33%, and rotate for 60 minutes; add 1Kg of sodium acetate, and rotate for 120 minut...
Embodiment 2
[0031] wet white process
[0032] Pre-tanning: 100Kg of oxalic leather is washed after softening and deliming, adding 100Kg of warm water at a temperature of 25°C, adding 4Kg of oxidized N-hydroxypropyltrimethylammonium chloride chitosan with an oxidation degree of 80%, and rotating for 180 minutes , let stand overnight;
[0033] Squeeze water: use a pass-through water squeezer to squeeze water, and the moisture content of the crust leather is required to be 50-55%;
[0034] Wrestling: Put the squeezed leather into the drum and rotate for 20 minutes;
[0035] Shave evenly: Shave evenly according to product requirements.
Embodiment 3
[0037] Retanning process
[0038] Retanning: 100Kg of wet blue leather, add 150Kg of water at a temperature of 35 to 40°C, add 3Kg of oxidized O-hydroxypropyltrimethylammonium chloride N-trimethyl chitosan with an oxidation degree of 30%, and rotate for 30 Minutes; add KMC chrome tanning powder 4Kg, Tannesco HN3Kg, and rotate for 90 minutes; dissolve 0.3Kg of baking soda in 5Kg of water, add to the drum in two times with an interval of 20 minutes; rotate for 40 minutes, stop the drum overnight.
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