Plastic toy mold silicone rubber is a kind of synthetic rubber, which belongs to organic silicone. It is the best high-temperature and cold-resistant silicone rubber.
Generally, it can still maintain good elasticity at -60~250℃, has high stability to thermal oxidation and ozone, and has excellent electrical insulation. The thermal expansion coefficient and thermal conductivity are 2-2.5 times and 2-3 times that of organic rubber, respectively. Silicone rubber solubility parameter δ=7.3-7.6, soluble in benzene, toluene and xylene.
According to the chemical structure, silicone rubber can be divided into dimethyl silicone rubber, referred to as methyl silicone rubber (MQ); methyl vinyl silicone rubber, referred to as vinyl silicone rubber (VMQ); methyl phenyl vinyl silicone rubber, referred to as benzene Base silicone rubber (PVMQ), trifluoropropyl methyl vinyl silicone rubber, referred to as fluorosilicone rubber (FVMQ): β-nitrile ethyl methyl vinyl silicone rubber, referred to as nitrile silicone rubber; dimethyl diethyl Silicone rubber, referred to as ethyl silicone rubber; polydimethylsiloxane-phenylene oxide copolymer rubber, referred to as phenylene and phenylene oxide silicone rubber. According to the vulcanization method, silicone rubber is divided into two categories: high temperature or thermal vulcanization (HTV) and room temperature vulcanization (RTV).
①It has good operability.
②Low viscosity, good fluidity and easy operation.
③ The shrinkage rate is small, generally less than two thousandths.
④ Good tensile strength.
⑤ Not easy to deform.
⑥The hardness of silicone rubber should be suitable for product use.
⑦High temperature resistance, more mold turning times, longer service life, better, acid and alkali resistance and aging resistance.
