1. Low density: Plastic has a low density, which is of great significance for reducing the weight of mechanical equipment and saving energy, especially for vehicles, ships, airplanes, and spacecraft.
2. High specific strength and specific stiffness: The strength of plastic is not as high as that of metal, but the density of plastic is small, so the specific strength (σ b/ρ) and specific stiffness (E/ρ) are quite high. Especially reinforced plastics made with various high-strength fibrous, sheet-like, and powdery metal or non-metal fillers have higher specific strength and stiffness than metals.
3. Good chemical stability: The vast majority of plastics have good acid, alkali, salt, water, and gas resistance, and under normal conditions, they do not undergo chemical reactions with these substances.
4. Good electrical insulation, thermal insulation, and sound insulation performance.
5. Good anti-wear and self-lubricating properties: Plastic has a low coefficient of friction, good anti-wear properties, and good self-lubricating properties. In addition, it has high specific strength and low transmission noise. It can work under liquid media, semi dry or even dry friction conditions. It can be used to make machine parts such as bearings, gears, camshafts, and pulleys, and is very suitable for situations with low speed and low load.
6. Strong bonding ability.
7. Good molding and coloring performance.