Acetal POM Acetal POM Acetal POM Acetal POM

Acetal Index

Acetal provides high strength and stiffness coupled with enhanced dimensional stability and ease of machining. As a semi-crystalline material, acetal is also characterised by a low coefficient of friction and good wear properties, especially in wet environments.

Main advantages of our acetal sheet, rod and tube are:

  • Acetal has high mechanical strength, stiffness, hardness and toughness
  • Excellent resilience
  • Acetal has good creep resistance
  • Acetal has high impact strength, even at low temperatures
  • Acetal has very good dimensional stability (low water absorption)
  • Acetal has good sliding properties and wear resistance
  • Acetal is excellent for machining
  • Acetal has good electrical insulating and dielectric properties
  • Acetal is physiologically inert (suitable for food contact)

The main disadvantage of acetal is that it is not self-extinguishing.

Because acetal absorbs minimal amounts of moisture, its physical properties remain constant in a variety of environments. Low moisture absorption results in excellent dimensional stability for close-tolerance machined parts. In high moisture or submerged applications, acetal bearings outperform nylon 4 to 1, although for often improved performance in applications requiring dimensional consistency in an abrasive, high humidity or submerged environment Ertalyte PET-P should be considered.

It is important to note that acetals do not perform as well in particularly abrasive wear applications as nylon.

Acetal is ideally suited for close tolerance mechanical parts and electrical insulators which require strength and stiffness. It also offers resistance to a wide range of chemicals including many solvents.

In general purpose use, both Delrin (Acetal Homopolymer) and Acetal (Copolymer) perform similarly and material selection can be based on stock availability.

For specific technical applications, or if you need further help selecting the appropriate grade – please contact us.

Acetal POM Acetal POM Acetal POM Acetal POM
Grades can be used for injectionmolding Molding, Extrusion and Blow Molding Good electrical properties (4): AMECA approved grade available Food contact and pharmaceutical approved grades (5): Flame retardant high dimensional accuracy and stability (3):High-Temperature and Wear-Resistant PEEK Board Grades can be used for injection molding Molding, Extrusion and Blow Molding Good electrical High-Temperature and Wear-Resistant PEEK Board properties (4): AMECA approved grade available Food contact and pharmaceutical approved grades (5): Flame retardant





Delrin®

Delrin® – otherwise referred to as acetal homopolymer – is manufactured from Delrin® acetal resin. Delrin® has higher mechanical strength, stiffness, hardness and creep resistance as well as a lower thermal expansion rate and often it also presents a better wear resistance than the acetal copolymer grade.

Available colours:
 White only

Available to buy in:
 Sheet: 8mm to 50mm thick   Rod: 5mm to 200mm diameter

Acetal Copolymer

Acetal copolymer is more resistant against hydrolysis, strong alkalis and thermal-oxidative degradation than the acetal homopolymer. Our acetal copolymer is the only porosity free acetal product available today and is FDA compliant (when purchased in white rod, sheet and tube or black rod and tube).

Available colours:
  White & Black

Available to buy in:
 Sheet: 1mm to 120mm thick   Rod: 5mm to 200mm diameter  Tube: various OD x ID – including large diameter

Ertacetal® H-TF / Delrin® AF

Ertacetal® H-TF is a Delrin® AF Blend, a combination of Teflon® fibres evenly dispersed in a Delrin® acetal resin. Compared with Acetal Copolymer and Homopolymer, this material offers superior sliding properties.

Ertacetal® H-TF is manufactured to order, and subject to minimum order quantities.

Available colours:
 Deep Brown

Available to buy in:
 Sheet: 12mm to 50mm thick   Rod: 10mm to 100mm diameter

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