The raw material of mixed silicone rubber is a kind of new environmental protection material, which has the excellent characteristics of non-toxic and tasteless, high and low temperature resistance, chemical stability, insulation and so on. Therefore, for some silicone rubber products that need environmental protection characteristics, the raw material of mixed silicone rubber is gradually replacing the traditional rubber raw material.


Because of its environmental protection characteristics, it is also known as food grade silica gel. So how do we identify food grade silica gel in our daily life?


1. You can smell the silicone products by nose. If there is a pungent smell, it is ordinary industrial silicone. If there is no smell on the surface, it is food grade silicone. Ordinary industrial silica gel is usually added with excessive silica powder, while food grade silica gel is produced with odorless curing agent, which has the characteristics of safety, environmental protection, non-toxic and odorless.


2. Can be boiled with boiling water, silicone products into boiling water, if there is no whitening, discoloration and other circumstances, it is food grade silica gel.


3. When baking in an oven, ordinary silica gel generally has a high temperature resistance of only 150 ℃ - 200 ℃, while food grade silica gel can withstand a high temperature of 200 ℃ - 230 ℃.


4. Silica gel raw material manufacturers are required to provide relevant food grade testing certification. Currently, the international common food grade testing certification includes FDA, lfgb, RoHS and other relevant certification. Ruifeng silica gel has relevant environmental protection food grade silica gel testing certification.


Food grade silica gel has the characteristics of non-toxic and tasteless, high temperature resistance, stable chemical properties and high transparency. The silica gel products will not turn yellow with time. The performance of ordinary silica gel is not so good. The products made of this kind of silica gel will not only have a great smell, but also turn yellow or dark with the growth of time.