Delrin® 100AF is a high viscosity acetal homopolymer containing 20% PTFE fibers. It is designed for applications requiring low wear and/or low friction against steel, itself, or other plastics.
This material maintains the inherent chemical resistance, low moisture absorption, and thermal stability of standard Delrin (up to 180°F/82°C continuous use), but the PTFE fibers specifically target tribological (friction/wear) improvements.
Delrin 100AF 20% PTFE fiber is supplied as semi-finished "stock shapes" for machining into custom parts. Common forms include:
Delrin® 100AF and Delrin® 100AF Blend are both PTFE (polytetrafluoroethylene)-filled acetal homopolymers from DuPont (now DELRIN USA LLC), designed for low-friction, wear-resistant applications like bearings, bushings, and sliding components. They enhance the base Delrin® acetal's properties with PTFE for reduced friction and improved lubricity. The key differences lie in their composition, PTFE content, processing methods, and resulting mechanical trade-offs.
| Property | Delrin® 100AF | Delrin® 100AF Blend |
|---|---|---|
| PTFE Content | 20% uniformly dispersed PTFE fibers | 13% PTFE fibers (typically a 2:1 blend of Delrin® 100AF and unfilled Delrin® 150) |
| Processing | Injection molding and Extrusion | Primarily for stock shapes via extrusion |
| Color | Dark Brown, Opaque off-white or natural acetal color | Dark brown |
| Strength & Toughness | Higher tensile strength and impact resistance due to full PTFE loading | Retains ~90% of unmodified Delrin® strength; slightly lower impact and wear capability from reduced PTFE |
| Friction & Wear | Lowest coefficient of friction; excellent for high-speed, low-lubricant needs | Very low friction with minimal "stick-slip"; better wear than unfilled Delrin® |
| Cost & Availability | More expensive; available but often custom-order for full-strength 20% fill | More cost-effective and widely available for stock shapes |
| Applications | Extruded shapes, Precision molded parts requiring maximum lubricity (e.g., high-load bearings) | General-purpose extruded parts (e.g., bushings, gears) where balanced properties are needed |
