POM (Acetal) Material Properties and Applications
Polyformaldehyde, or polyoxymethylene, also known as POM or acetal, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction and excellent dimensional stability. Acetal is a nonhygroscopic, opaque, semicrystalline material used in injection molding and extrusion. One of the stiffest thermoplastics available before fillers are added, it is also known as the most metal-like plastic and for its great lubricity. Acetal is often selected when a low coefficient of friction is required, offering excellent wear and long-term fatigue in addition to easy machinability. Within limits, acetal parts will go back to their original shape after stress is released, making this material ideal for parts with spring-like features.
- High stiffness
- High lubricity
- Excellent chemical resistance
- Excellent dimensional stability
- Resistance to hydrocarbons
- High creep and fatigue resistance
- Low moisture absorption
- Bearings, rollers and gears
- High-speed conveyor lines
- Valves and manifolds
- Food processing components
- Plumbing components
- Wear pads and wear strips
- Seatbelts
- Automotive door handles and locks
- Fuel caps and fuel system components
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