Preparation method for environmentally-friendly waterproof mercerized suede leather
A production method and an environmentally friendly technology, applied in the field of leather manufacturing, can solve the problems of irregular pile uprighting and dumping, lower mechanical indicators such as leather tear resistance, and inconsistent color difference, etc., to achieve good softness and waterproof silky feeling , Large grain surface tear resistance, uniform color effect
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[0022] Example 1
[0023] The invention is an environmentally-friendly water-proof mercerized suede manufacturing method, which includes sequential preparation, degreasing, washing, retanning, alkali extraction, drainage, neutralization, filling and fatliquoring, acid fixation, washing and drying, softening, and grinding leather , Trimming process, where the material preparation includes material selection, water return, water squeezing, skinning, smoothing, trimming and weighing steps. In the present invention, the steps of material preparation, water washing, alkali extraction, drainage, acid fixation, water washing and drying, softening, leather grinding and trimming are all conventional steps, which will not be described in detail here. All materials used in the following are based on parts by weight.
[0024] In the material preparation process, wet blue cow leather is selected. In this embodiment, 100 parts of wet blue cow leather are selected and put into the drum. The drum...
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[0038] Example 2
[0039] The difference between this embodiment and embodiment 1 lies in the retanning, neutralization and filling and fatliquing processes.
[0040] In the retanning process, 100 parts of wet blue leather and 100-120 parts of warm water at 30°C are added to the drum machine, then 2.0 parts of Turkish chrome powder AB and 1.0 part of Turkish chrome tannin CR- 100, rotate for 60 minutes, add 1.0 part of chromium cross-linking agent MCS, and rotate the drum for 60 minutes to make the surface and the inside of the wet blue leather uniform, and the color of the blue leather uniform. Then add 1.0 part of sodium formate and 0.4 part of sodium bicarbonate, and rotate the drum for 40 minutes. At this time, the pH of the leather is detected to be 3.8, and the high temperature shrinkage resistance reaches 95°C or more. Then add a certain proportion of water to the drum machine, wash and drain.
[0041] In the neutralization process, add 150 parts of water successively, add 2...
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