Polyacetal or Acetal
POM / Acetal is a fabulously tough engineering polymer also with great anti-friction properties.
“I find Hardie Polymers very easy to deal with and always get an immediate response so I know straightaway that someone is working on my request. Bartosz is my main contact and he is brilliant to deal with.
It is very rare that they cannot source a polymer that I request – our requirements can come at quite short notice and they always help out where possible.
I have absolutely no hesitation in recommending Hardie Polymers. It is always a pleasure to do business with them.”
Opus International Products Limited, Warwick
- Very hard, stiff and tough
- Natural lubricity
- High heat resistance
- High abrasion resistance
- Low moisture absorption
- Great anti friction properties
- Unbreakable down to -40°C
Resistant to weak acids and alkaline solutions, fuels, benzene, oils and alcohols.
Not resistant to strong acids.
- Engineering components
- Gear wheels
- Ski bindings
- Fan wheels, springs, chains and nuts
- Bobbins and Connectors etc
- Medical applications such as inhalers
Different manufacturing processes are used to produce the homopolymer and copolymer versions of POM.
Highly flammable, gives off a bluish flame and then drips and continues to burn. Smells like formaldehyde when extinguished.
Density – 1.41-1.42 g/cm ³
Pre-Drying – Not necessary unless it has become moist. Then 4 hours at 100°C in a dehumidifying hot air drier
Melt temperature – 205-215 °C
Mould Temperature – 40-120 °C
Shrinkage – Approx 2 %. Allow 24 hours for full shrinkage to occur.
Trade names and manufacturers
DuPont – Delrin
Formosa Corporation -Formocon
Celanese – Hostaform
Mitsubishi Engineering Plastics – Iupital
Korea Engineering Plastics – Kepital
LG Chem – Lucel
Grupa Azoty – Tarnoform
BASF – Ultraform
Hardie Polymers can help source grades from all of the above manufacturers
The worlds first Acetal polymer was introduced in 1960 by DuPont and was named Delrin ®. It is widely used in many different applications today such as automotive, industrial, electronic and consumer goods.
Delrin® is the registered trademark for DuPont’s brand of acetal homopolymer resin which is also commonly referred to as polyoxymethylene (POM).
Around two years later in 1962, Polycetal copolymer was invented by Celanese. Many other companies around the world now produce this material – please refer to the list below for examples.
More about Polyacetal
Articles by Dr Charlie Geddes
Our longstanding partnerships allow us to specialise in sourcing and compounding most grades of engineering polymers. All brand names listed are trademarks of the manufacturers and we are not an authorised distributor for these manufacturers. We only supply prime grades in original packaging with the manufacturers documentation.
® – Trademarks owned or used by the producers.
™ – Registered in the U.S. Patent and Trademark Office (status in the U.S. only, registration status in other geographies may be different)