Our parts are running in sea water (at low speed,low friction and low torque),the 2 half parts (appx.one square inch) are made of Delrin Dupont,surface are flat,we are using Loctite 495,but it's not strong enough.All suggestion are welcome. B.Richard pressexpeert@hotmail.com
The adhesive joining of DELRIN acetal resin is generally limited to prototype parts with low shear forces. This is because the shear strength achieved with most adhesives is only 2 to 10 percent of the available shear strength of DELRIN. The best adhesion requires a special roughening step such as "Satinizing" or you might try using 280 grit emery cloth. The Satinizing provides the best results. Contact Dupont for their Design Handbooks related to this process. If you want to try the sanded approach Dupont recommends Blue Label "Instant Weld" (a Alpha Cyanoacrylate base) adhesive which according to their handbk provides 2600psi shear strength (after 48 hours aging time).
Hope this helps.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so it’s critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Download Now
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
RE: Bonding of two Delrin (Dupont) parts
Hope this helps.