POM - Acetal Polyoxymethylene 

TECAFORM Ensinger Plastics

POM material, commonly called acetal (chemically known as Polyoxymethylene) is manufactured by Ensinger in standard stock shapes for machining and is extruded in sheet, rod and tube. POM plastic is a semi crystalline thermoplastic with high mechanical strength and rigidity. Acetal polymer has good sliding characteristics and excellent wear resistance, as well as low moisture absorption. The good dimensional stability and particularly good fatigue strength, as well as excellent machining ability, makes POM polymer a highly versatile engineering material, even for complex components.

A distinction is made between acetal homopolymers (POM-H) and acetal copolymers (POM-C) in regard to their properties. Due to its higher crystallinity, the properties of POM H include a slightly higher density, hardness and strength. POM C material, however, has higher chemical resistance and a lower melting point than POM H.

POM material properties and specifications

POM plastics offer:

  • High strength, rigidity and toughness
  • Good impact strength, even at low temperatures
  • Low moisture absorption (at saturation 0.8%)
  • Outstanding wear resistance and sliding properties
  • Excellent machinability
  • Good creep resistance
  • High dimensional stability
  • Good resistance to hydrolysis (up to ~140 °F)
  • Excellent resilience/recovery elasticity

Manufactured POM Materials

Acetal plastics modifications are supplied by Ensinger under the tradename TECAFORM. The Ensinger TECAFORM family contains the following Acetal modifications: 

Ensinger is a supplier of Acetal shapes such as:

  • Acetal rod
  • Acetal sheet
  • Acetal tube

Delrin® is a registered trademark of  E.I. du Pont de Nemours and Company.

Typical POM applications

    • Sliding applications
    • Excellent design solutions with snap fastenings
    • Sliding parts such as bearing bushes, rollers and slide rails
    • Electrical insulating parts
    • Components with contact to water
    • Scratch proof high-gloss exposed parts
    • Wide range of components in the food, pharmaceutical and drinking water industries and in medical technology