Silicone material stretch white, you really understand the vapor phase silicone and precipitated silicone?
🕙 2022-12-21 👆
With the popularization and application of silicone products in life, more and more industries use silicone as the main material for product customization processing. However, many consumers are troubled by the defects and problems caused by the unused silicone materials and application fields. The white surface of silicone products after stretching occupies one of them. So under what circumstances will the product appear white phenomenon, today for everyone popular science
It is normal for silicone products to stretch and twist and appear white. Some friends may be misled that the product appears white, which is a bad phenomenon. Why can the silicone products appear white?
First of all, the raw material of silicone belongs to the translucent white mist material, so the product after stretching white is mainly related to the raw material, silicone material is mainly divided into ordinary silicone, gas phase silicone, medical silicone, special silicone, and different levels of material can be seen from the stretching of what material belongs to.
The main reason for the white of the product is that it belongs to precipitated silicone rubber, and the material is mainly caused by the precipitation of white carbon black, which is mainly made of industrial water glass obtained by the reaction of quartz sand and soda ash under high temperature. This kind of white carbon black is prepared into dilute solution with water. Under the condition of epoxy, compounds are added to precipitate the white carbon black after cleaning, drying and crushing. Therefore, the fog-like whitening of its products is mainly caused by the presence of certain compounds in the silicon molecular chain, and the whitening phenomenon occurs during stretching
In addition to precipitation method silicone rubber, silica gel also has gas phase method silicone rubber, this material relative precipitation silicone performance is more prominent, is also we often say food grade silicone material, its purity is higher, silicon molecular structure is stronger, the use of silicon tetrachloride and air combustion of silicon dioxide made of silicon molecular detail to 800-1000 mesh, The ordinary precipitated silica gel is about 400-600, and the vapor phase silica gel will not appear white mist when stretched.
So sometimes we can distinguish silicone from this problem to identify it is ordinary silicone or food grade silicone, ordinary silicone usually after silicone products manufacturers molding vulcanization stretching surface will appear fog-like phenomenon, and the performance of gas phase silica gel and raw material purity is more superior, in the stretch rebound will not appear white imagination
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