Delrin® acetal resins are thermoplastic polymers manufactured by the polymerization of formaldehyde, which have gained widespread recognition for reliability of performance in many thousands of engineering components all over the world. Since their commercial introduction in 1960, they have been used in the automotive, appliance, plumbing, construction, hardware, electronics and consumer goods industries among others.

Parts made from Delrin® acetal resins have a combination of physical properties not available with either metals or most other plastics due to the chemical composition, regular structure and high degree of crystallinity of these resins.

Delrin®acetal resins have good dimensional stability compared to other plastics over a wide range of temperatures in atmospheres containing moisture, lubricants and solvents. They find extensive use in industry for the fabrication of precision gears, bearings, housings and similar devices, because of their unique combination of dimensional stability with other properties, such as fatigue resistance and tensile strength. However, as with all materials of construction, there are factors affecting the dimensional stability of Delrin® which must be considered when close tolerances are essential.

Key Features of DELRIN®

  • High mechanical strength and rigidity
  • Fatigue endurance unmatched by other plastics
  • Excellent resistance to moisture, gasolines, solvents and many other neutral chemicals.
  • Excellent dimensional stability
  • High resistance to repeated impacts
  • Good electrical insulating characteristics
  • Resiliency
  • Natural lubricity
  • Wide useful temperature range (in air:-50 to+90°C, -60 to +160° F, with intermittent use up to 160°C (320° F)
  • FDA approval of certain Delrin compositions.

Applications of DELRIN®

  • Pumps
  • Bearings
  • Lab Diagnostic Equipment
  • Medical Devices