Novel auxiliary for leather pickling process
The technology of pickling and process is applied in the field of new additives in the pickling process of leather, which can solve the problems of increasing tanning sewage salt, chromium pollution, non-conformity, etc., and achieve the effects of improving the leather rate, reducing the use and improving the absorption.
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[0015] A new type of auxiliary agent for leather pickling process, its composition is: glutaric acid 60%, Pingpinga O-15 10%, sodium dodecylbenzene sulfonate 10%, sodium metapolyphosphate 20%, grinding Crush and mix thoroughly. According to the following process, the pickling process is carried out on the pickled leather, and the test is compared with that without the pickling assistant.
[0016] The amount of added materials is based on the quality of the pigskin-soaked inner leather
[0017] Weighing after tanning: 1.8mm±0.2mm (double layer)
[0018] Wash with distilled water 300% at room temperature and wash once in stuffy water for 5′
[0019] Softened distilled water 100% 35°C
[0020] Na 2 CO 3 0.5+0.6% 10' pH7.5-8.0
[0021] Softener SO 2.0%
[0022] NH 4 Cl 0.5%
[0023] Degreasing agent FB 0.5% turn 60'stop 30'
[0024] Turn 90', stop 30'
[0025] Spin again 60' and wash with water
[0026] Select 50 pieces of skin, face up, cut the skin from the rear buttock...
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