POM介绍
Created on 08.07
POM (Polyoxymethylene, abbreviated POM) is a high-performance engineering plastic, also known as polyoxymethylene resin, acetal, or supersteel. It boasts high hardness, strength, and wear resistance. It is a linear polymer with no side chains, high density, and high crystallinity. Based on the chemical structure of its molecular chain, POM can be divided into homopolyoxymethylene and copolymers. Homopolyoxymethylene has high density, crystallinity, and melting point, but poor thermal stability and a narrow processing temperature range. Copolymers, on the other hand, have better thermal stability and a wider processing temperature range.
Performance Characteristics
Mechanical Properties: POM exhibits high strength, high rigidity, and excellent creep and fatigue resistance. Its tensile strength can reach 70 MPa and its impact strength is 13.8 kJ/m², making it suitable for parts requiring high strength and wear resistance.
Thermal Properties: The melting point of homopolyoxymethylene is 175°C, while the melting point of copolymerized oxymethylene is slightly lower at 165°C. Although POM decomposes easily at high temperatures, the addition of heat stabilizers can extend its processing temperature range.
Chemical Properties: POM has good resistance to many organic solvents and fuels, but is less stable to strong acids and bases. While stable to organic chemicals at room temperature, its chemical resistance decreases at high temperatures.
Electrical Properties: POM has excellent electrical insulation properties and high dielectric strength, making it suitable for various parts in the electrical and electronic fields. Components
Other Properties: POM has low water absorption, excellent dimensional stability, and strong weather and UV resistance, making it suitable for outdoor use.
Applications
Automotive: POM is used in carburetor components, fuel lines, pumps, power valves, bearings, gears, and other applications. Its high mechanical strength and wear resistance make it an ideal metal replacement.
Electronic and Electronic: POM is used in connectors, plug-in components, switches, buttons, relays, and other components due to its high dielectric strength and excellent electrical insulation properties.
Other Applications: POM is also used in anti-friction and wear-resistant parts, transmission components, chemical and instrumentation components, and more.
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