Delrin® 500AF Blend Plate

Delrin® 500AF Blend is an acetal homopolymer carrying 13% PTFE fibre, produced by blending fully loaded AF resin back into base homopolymer. The PTFE is present as fibre rather than powder, so it works its way to the wear interface and lays down a transfer film on the mating part, giving low static friction and excellent wear life without external lubrication. The blend keeps meaningful structural capability at 7,200 psi tensile strength, a 475,000 psi tensile modulus, and 13,000 psi flexural strength, with 87 Rockwell M hardness and 0.18% moisture absorption in 24 hours.

It is machined into bushings, sleeve and thrust bearings, cams, gears, slide plates, and guides for business machines, printing and packaging equipment, conveyor systems, and automotive assemblies, running against steel or against other plastics. Stock shapes machine well and produce good surface finish, which matters for bearing bores. Long-term service temperature is 185°F with 300°F intermittent, and the UL 94 rating is HB. Limitations are worth stating plainly: it is not resistant to hot water above 140°F, tensile strength and impact are lower than unfilled homopolymer, brown is the only colour, and strong acids attack the acetal matrix.