Pp plastic molding, pp is an engineering material with excellent comprehensive performance, its material performance density is small, strength stiffness, hardness and heat resistance are better than low-pressure polyethylene, with good electrical properties and high-frequency insulation are not affected by humidity However, it becomes brittle at low temperature, does not wear and is easy to age, and is suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. Its tensile strength can reach 37Mpa. Low viscosity and good fluidity. Another advantage is its weather resistance, which is used at temperatures around 100 degrees Celsius. Pp has a coefficient of linear expansion of 6-10, a small coefficient of linear expansion, good dimensional stability, and good creep resistance; high tensile strength, impact strength and hardness; water, an inorganic acid, and alkali resistance Wait. However, the weather resistance is poor, and photooxidative aging and thermal-oxidative aging are prone to occur. In order to improve weather resistance, it can be overcome by modifying and adding an antioxidant.
Because pp has good acid and alkali resistance, strong mechanical properties and high-temperature range, it is more suitable for the forming materials of hangers.
