Acetal Copolymer vs Delrin® Acetal Homopolymer

It’s more than acetal – it’s DuPont^™ Delrin^®.

Unlike acetal copolymers, Delrin^®  is a tough, lightweight and durable acetal polymer with inherent low friction, low wear, low noise, low moisture pick-up and excellent spring back properties, invented by DuPont.It's so well known that the brand name Delrin^® is often misused as the industry term for acetal resin. But, not all acetals are equal.

How is Delrin^® different?

Delrin^® is an acetal homopolymer and has a uniform backbone with a larger crystalline block structure than acetal copolymers providing better chemical bonding. As a result, Delrin^® is the stiffest and strongest unreinforced technical engineering polymer available. 

Delrin^® offers major benefits over acetal copolymer

Specifying Delrin^® for highperformance, high precision mechanical parts can allow to optimize part design and production :

• Increased design flexibility
• Thinner wall sections at same physical part performance
• Lighter parts 
• Less material usage
• Improved mold filling
• Shorter molding cycle times
• Upgrading from existing tooling delivers higher performance parts
• For new part design and upgrading with current molds 
• Potential for reduction in part production cost (customers quote up to 20%)

Mechanical properties comparison

For example, Delrin^® 500P, our general purpose resin, significantly outperforms general purpose acetal copolymer across the entire mechanical spectrum: