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Click Bond have chosen Victrex PEEK polymer in their newly developed bonded nut plate stand-off for the cargo doors of a manufacturer’s new generation of commercial aircraft.
According to Mark Egeberg, Click Bond Pacific Regional Manager, “The high strength and stiffness of the Victrex PEEK polymer combined with Click Bond’s innovative approach to adhesive-bonded stand-offs provides the necessary structural integrity while reducing installation labour.”
Victrex explain that the use of adhesive to bond mounting hardware to the structure eliminates the need to drill and dress holes, and install rivets. “Adhesive bonding is faster and also saves significant time and money, should an attachment require relocation and rework is necessary because no holes are drilled.” added Egeberg. In addition to reducing part count, eliminating rivet holes reduces fatigue and corrosion potential.
Victrex say their PEEK polymer has replaced a glass and epoxy composite used on previous stand-offs. “Injection moulding the part with Victrex PEEK polymer is a good alternative to glass and epoxy composite, especially when higher volumes dictate a production method with a much faster cycle time and lower part cost,” explained Egeberg. “The polymer provides the necessary properties required for structural attachments in aerospace applications, including superior bond strength, high strength and stiffness, excellent flammability performance, and resistance to hydraulic fluid.” In addition, the polymer is injection mouldable in thin walls and allows for excellent wet-out of high fibre content.
Click Bond uses a self-fixturing process to maintain an accurate position on the substrate during bonding with a permanent structural adhesive. “Our ‘fixture-in-place’ process allows the adhesive to cure with constant pressure and consistent bondline thickness,” said Egeberg. “The self-fixturing parts eliminate the need for special tools, clamps and drills, thus speeding up the process of installing attachment bracket hardware.”
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