Dimethyl silicone oil is a linear polydimethylsiloxane with Si-O-Si as the main chain and methyl groups attached to silicon atoms. Due to the small intermolecular forces, the molecules have a helical structure, and the methyl groups are arranged outward and can rotate freely. Therefore, it has a series of characteristics, such as colorless and transparent, wide viscosity range (from 0.65~1000000mm2/s), low temperature viscosity coefficient, high expansion coefficient, low vapor pressure, high flash point, high and low temperature resistance, weather resistance, radiation resistance, low surface tension, high compression rate, oxygen plasma resistance, high insulation, shear resistance, film-forming, hydrophobicity, defoaming, demolding, high gloss, material inertness, chemical inertness, non corrosion and physiological inertness. It is these characteristics that determine It has a wide range of applications. Generally, based on the viscosity range of dimethyl silicone oil on the market, it can be divided into three specifications: low viscosity silicone oil 0.65~50mm2/s; Medium viscosity silicone oil 50~1000mm2/s; High viscosity silicone oil 5000~1000000mm2/s.