DELRIN® is an acetyl copolymer resin manufactured by DuPont Engineered Plastics. Delrin® is lightweight and has excellent dimensional stability, machinability and high mechanical strength and stiffness. As a strong Polymer, Delrin® provides good wear and abrasion resistance, a low coefficient of friction and low moisture absorption, making the product a good choice for use in high moisture environments. Delrin® is an excellent choice for its long term mechanical stability in applications such as Valves, Washers, Gears, Bushings, Bearings, Seals, Rollers, Timing Screws, Electrical Components and Anti-Friction Parts. It is most often used for electronic office equipment, advanced conveyor technology and automotive applications. It is important to note that although Delrin® is strong mechanically, and offers excellent resistance to moisture, gasoline, solvents, and many other neutral chemicals, it cannot tolerate acidic conditions long term.

One of the properties of Delrin® that makes it difficult to bond to is its low friction properties which are the result of the manufacturing process. Delrin® can be bonded to but it requires careful preparation and BONDiT^TM brand primers and adhesion promoters in some cases, and BONDiT^TM brand adhesives manufactured by RELTEK LLC. BONDiT^TM products are among the few available that can be used to bond Delrin® to itself, and to other substrates for harsh environments and long term deployment without debonding.

Our primary recommendation is using BONDiT^TM B-45 or BONDiT^TM B-482 for bonding Delrin or Acetal.

Our recommendation would change if you are overmolding with elastomers such as polyurethane, where we would recommend using BONDiT^TM A-43 as a primer/adhesion promoter for the urethane.

If exceptional chemical resistance is needed, we would recommend BONDiT^TM B-481 or B-4811 instead of the B-45 or B-482.

Among the other substrates which Delrin® can be bonded to using BONDiT^TM products are: UHMW, fluoropolymers, rubber, polyethylene, polyolefin, polypropylene, polyurethane, silicone, thermoplastics, thermoset, urethane, glass, ceramics, wood, metals, stone, aggregate and concrete.

Corona or flame etch is occasionally necessary to prepare the edges of a proposed bond to strengthen the bond and reduce the slickness of Delrin®'s surface chemical bloom. This can be expected to be necessary only about 15% of the time. If you think that your application may require this treatment, please call us at (707) 284-8808 or email us at reltek@reltekllc.com for advice as this technique requires skill and experience.

To see our chart showing elongation rankings of the various BONDiT^TM products click here. Call or email us for advice on for COE ratings and matching BONDiT^TM products for your application at (707) 284-8808 or reltek@reltekllc.com.