POM refers to polyoxymethylene (POM), a high-performance engineering thermoplastic known for its high strength, high stiffness, low coefficient of friction, and good dimensional stability. Due to its mechanical properties, wear resistance, and ease of processing, it is often used as a metal substitute in gears, automotive parts, and electronic products, but it is sensitive to ultraviolet light.
Key Characteristics and Features
High Strength and Stiffness: Strength approaching that of some metals, ideal for load-bearing components.
Low Friction and Wear Resistance: Ideal for sliding and rotating components (gears, bearings).
Excellent Dimensional Stability: Low moisture absorption ensures component stability under varying humidity levels.
Good Chemical Resistance: Resistant to hydrocarbons, ketones, and other solvents.
Wide Temperature Range: Maintains performance over a temperature range of -40°C to 130°C.
Easy to Process: Suitable for injection molding, allowing for the creation of complex shapes.
Common Applications
Automotive: Gears, fuel system components, switches, door lock components.
Electronics: Keyboards, buttons, small gear mechanisms.
Machinery: Gears, bearings, conveyor components, pump components.
Limitations
Poor UV Resistance: Degrades in sunlight; outdoor use requires additives or specific grades of products.