What is the difference between medical food silicone rubber and industrial silicone rubber

Food grade silicone rubber is usually used to contact some food related products in our life, such as common baby pacifiers, silicone rubber tableware, food molds, etc. These will be made according to food grade standards. The certification standard is FDA food grade contact certification; Industrial grade silicone rubber is generally used to make industrial products.

How do we distinguish between silicone rubber grade food? First of all, we need to understand the concept. In addition to industrial grade silicone rubber, medical grade silicone rubber contains food grade silicone rubber. That is to say, just distinguish between food grade silicone rubber and industrial grade silicone rubber; Industrial grade silicone rubber is catalyzed by organotin. Organotin will have some pungent taste, while food grade silicone rubber has no taste. We can also distinguish food grade silicone rubber from industrial grade silicone rubber by simple smell;

In addition to distinguishing by smell, we can also distinguish by the operation ratio of silicone rubber. The ratio of industrial silicone rubber is usually 100:2, while the ratio of food silicone rubber is mostly 10:1 or 1:1; If the ratio is not obvious enough, we can distinguish it through the molding process. Industrial grade silicone rubber is cured by contacting water in the air and catalyst, so the ambient temperature will not affect its curing conditions too much, while food grade silicone rubber can be cured at room temperature or heated. The higher the ambient temperature, the faster the curing time.