First of all, we understand what food grade silica gel is. Food grade liquid silica gel is A kind of two-component silica gel, which is divided into A component and B component. A component is silica gel, and B component contains platinum catalyst.The whole two component liquid silica gel is composed of platinum catalyst, 107 base glue, silica black and hydrogen containing silicone oil.Platinum catalyst is a very important component element, only the addition of platinum catalyst can make AB two components can be very good curing molding.

  What is sludge?Sludge is an indispensable auxiliary material in the application and production of silica gel molds.The commonly used sludge materials are mainly as follows.One is industrial clay (talcum powder)60%, flexible binder (grease or butter)30%, solid binder (paraffin or vaseline)10%.The second is wax 9% ~ 10%, sulfur 50% ~ 55%, ash 9% ~ 10%, grease (butter)20% ~ 25%, resin, pigment a little.The third kind is construction mud, composition for clay and tung oil.

  Sludge is mainly used for arts and crafts, hardware, plastic mold, student sculpture, can be recycled, long time does not deteriorate.It is sensitive to temperature and can soften the shape at low temperature.Crafts and other models of sculpture, plasticity.

  So add molded food grade environmental protection silicone can contact with sludge?To see whether the sludge components contain heavy metals and other toxic impurities, that is, to see whether the sludge can pass food environmental certification.If the oil mud contains heavy metals and toxic impurities, once molded silica gel contact with the oil mud, it will lead to the contact surface of liquid silica gel and oil mud can not be cured.The cause is platinum added to form food grade liquid silicone

  Gold catalyst is a very active ingredient, strong chemical sensitivity, once the platinum catalyst has contact with the toxic substances in the sludge, it will lead to the failure of the platinum catalyst in silica gel, which directly affects the solidification of food grade liquid silica gel.