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  • High mechanical strength
  • High hardness and stiffness
  • High rigidity
  • Excellent resilience
  • High fatigue strength
  • Good creep resistance
  • Good impact strength even at lower temperatures
  • Good wear resistance, though mostly less favourable than the nylons
  • Low coefficient of friction
  • Excellent Machineability
  • High dimensional stability
  • Low moisture absorption
  • Good electrical insulating properties
  • Physiologically inert (Nat.)
  • Natural ERTACETAL® C suitable for food contact (FDA approval)
  • Good chemical resistance
  • Non self-extinguishing
  • Poor weather resistance
  • Poor resistance to high-energy radiation
  • Gear wheels with small modulus
  • Heavily loaded bearings
  • Guide and wear strips
  • Snapfit assemblies
  • Electrical components
  • Pump housings
  • Impellers
  • Bearings
  • Valves
  • Valve seats



Acetal manufactured by Quadrant EPP is branded ERTACETAL®. Acetal resins are crystalline thermoplastic polymers with a melting point somewhat lower than nylon. Valuable mechanical properties include high strength and stiffness as well as good wear and impact resistance. Acetal's low water absorption results in excellent dimensional stability even in high moisture environments.

There are two types of a Acetal: homopolymer (H) and coploymer (C). The homopolymer DELRIN® of Du Pont and the copolymers of  Hostaform of Hoechst and Ultraform of BASF are the most commonly used trade marks in Europe.

ERTACETAL C Material data sheet ERTACETAL C Safety data sheet

Both homopolymer (DELRIN®) and copolymer grades are similar in their overall balance of properties although each shows some difference from the other in detail. In general, the mechanical properties of the homopolymer (DELRIN®) are slightly superior to the copolymer although the latter has a higher continuous operating temperature. Alkali resistance of the copolymer is superior to that of the homopolymer (DELRIN®)and it is not effected by long term exposure to water even, at temperatures of 60 to 90oC. This can cause some reduction in properties of the homopolymer (DELRIN®) material.

ERTACETAL H  Material data sheet ERTACETAL H Safety data sheet


Acetal Copolymer has

  • Better chemical resistance
  • Continuous operating temperature 100oC
  • Melt point 165oC
  • Density 1.43 (g/cm3)
  • More resistant against hydrolysis
  • More resistant to strong alkalis








Acetal copolymer natural

  • Rod extruded Æ 3mm to 250mm
  • Rod Precision ground on request
  • Tube extruded 20mm O/D x 10mm I/D to 350mm O/D x 300mm I/D
  • sheet 1mm to 6mm
  • Plate extruded 8mm to 100mm

Acetal copolymer black

  • Rod extruded Æ 5mm to 250mm
  • Rod Precision ground on request
  • Tube extruded 25mm O/D x 12mm I/D to 100mm O/D x 50mm I/D
  • sheet 2mm to 6mm
  • Plate extruded 8mm to 100mm 

Acetal Homopolymer (DELRIN®) has

  • Slightly superior physical properties
  • Continuous operating temperature 90oC
  • Melt point 175oC
  • Density 1.43 (g/cm3)
  • Slightly superior mechanical strength, stiffness & hardness
  • Better Wear resistance


A typical characteristic of semi-finished acetal material particularly Acetal Homopolymer is the micro porosity of the centre. Because of this phenomenon parts made from Acetal may not be liquid or gas proof. For intricate gas and liquid proof components we would recommend ERTALYTE® [PET]. as a suitable alternative material.



Acetal homopolymer (DELRIN®) natural

  • Rod extruded Æ 5mm to 200mm
  • Rod Precision ground on request
  • Plate extruded 8mm to 50mm

Acetal homopolymer (DELRIN®) black

  • Rod extruded Æ 16mm to 80mm
  • Rod Precision ground on request
  • Plate extruded 10mm to 50mm

A list of the most common Sizes etc that are readily available as standard items can be down loaded here

ERTACETAL® is a registered trademark of Quadrant  Engineering Plastic Products. DELRIN® is a registered trademark of Du Pont

The information given here is believed to be correct, but completeness and accuracy are not guaranteed. The user shall be fully responsible for determining the suitability of products for the intended use.