Acetal copolymers have great machinability and low moisture absorption, making them a very adaptable material that performs well in a wide range of applications. For this reason copolymers are used extensively across the automotive, food and electronics industries.
Acetal homopolymers offer superior mechanical strength, stiffness, hardness, and creep resistance. Additionally, acetal homopolymers have a significantly lower thermal expansion rate and increased wear resistance.
While acetal homopolymers do have a higher crystallinity and therefore a higher heat distortion temperature, acetal copolymer grades have higher continuous use temperatures because of better long term stability. Acetal copolymer’s lower crystallinity also means that it has better friction resistance.
Especially in wet environments, food grade acetals offer excellent wear and impact resistance for food processing applications. They are also resistant to common cleaning agents. With good chemical resistance and low moisture absorption, acetal copolymer is an excellent material for components in wet, potentially corrosive environments, such as valves and seals. Thanks to their high electrical strength and low porosity, copolymer acetals are also commonly used in applications involving high levels of electrostatics.
Acetal homopolymer excels in a variety of applications including small diameter, thin-walled bushings and bearings, gears, electrical components, valves, and fluid handling components. With great dimensional stability, easy machining, and good mechanical performance, acetal homopolymer can reduce component weight with no loss of functionality.
Acetal homopolymer is more expensive than acetal copolymer, and this is down to the superior mechanical strength of acetal copolymer.
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