Armstrong Energy stocks the standard grade of Acetal:

  • Ertacetal® C - natural and black

The acetal copolymer (POM-C) is more resistant against hydrolysis, strong alkalis and thermal-oxidative degradation than the acteal homopolymer (POM-H). The latter however has a higher mechanical strength, stiffness, hardness and resistence to creep, as well as a lower thermal expansion rate and often presents better wear resistance. Ertacetal® is very well suited for machining on automatic lathes and is recommended for mechanical precision parts.

Available in rod, tube and sheet, cut to size or machined to customer requirements.

Main Characteristics

  • High mechanical strength, stiffness and hardness

  • Excellent resilience

  • Good creep resistance

  • High impact strength, even at low temperatures

  • Very good dimensional stability

  • Good sliding properties

  • Excellent machinability

  • Physiologically inert (suitable for food content)


  • Gear wheels with small modulus

  • Cams

  • Heavily loaded bearings and rollers

  • Bearings and gears with small clearances

  • Valve seats

  • Snapfit assemblies

  • All kinds of dimensionally stable precision parts for machine construction

  • Insulating components for electrical engineering

  • Parts which operate continuously in water of 60˚C  to 80˚C

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