Anti-static cattle hide upper leather and preparation method thereof
An anti-static, shoe upper leather technology, applied in special leather manufacturing, leather surface treatment, small raw leather/large raw leather/leather/fur treatment, etc.
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[0051] Wet blue leather obtained by conventional technology is used as raw material;
[0052](1) Sampling and weighing, according to 120% weight of wet blue leather;
[0053] (2) Water washing: liquid ratio 3.0, temperature normal temperature, stuffy water washing 2 times, each time 5min, rotating speed 8-10rpm, liquid control;
[0054] (3) Softening: liquid ratio 2.0, internal temperature set at 32°C, rotating speed 8-10rpm, add formic acid, turn for 40min, then measure pH, and then control liquid;
[0055] (4) Water washing: liquid ratio 3.0, temperature normal temperature, stuffy water washing 2 times, each time 5min, rotating speed 8-10rpm, liquid control;
[0056] (5) Retanning: liquid ratio 1.5, internal temperature 32°C, add NL20 (Sichuan Dawei Technology Co., Ltd., to neutralize the retanning agent), turn for 30 minutes, require pH>4.6, add A18 (Sichuan Dawei Technology Co., Ltd., Small molecule acrylic acid) and A33 (Sichuan Dawei Technology Co., Ltd., macromolecula...
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