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双酚与皮革 - 您需要知道 您需要了解的有关此主题的所有信息都集中在一个部分中。 我们回答了如何减少皮革中双酚的暴露并应对最新的监管挑战的问题。 -
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It has become the general practice to soak with soda ash, caustic soda or magnesium oxide at pH levels around 9.5 - 10.5. The reason for this is that bacterial growth is substantially less at this pH and the skin fibres more readily absorb water at this alkalinity. Enzyme soaking agents such as PELLVIT are optimised at this pH. In addition, when such alkalis as soda ash or caustic soda are used to achieve alkalinity this also has a scouring effect or partial saponification on fatty substances, this is particularly effective in combination with emulsifiers.
Sodium sulfide may also be used both to achieve a mild degree of alkalinity and to pre-treat the hair and epidermis with reducing agent during the soak.
