This technical information has been contributed by
Tri-Mack Plastics Manufacturing

New Hybrid Molding Process, Material Innovations Deliver Next-Generation Aerospace Bracket

Victrex and Tri-Mack Plastics Manufacturing Corp. engineered this aerospace bracket using a new PAEK-based polymer and hybrid molding technology developed by Victrex.
Photo courtesy of Victrex/Tri-Mack Plastics.

WEST CONSHOHOCKEN, Pa.—A new PAEK-based polymer and an innovative hybrid molding technology, both developed by Victrex, allow engineers to overmold a PAEK-based composite with fiber-reinforced VICTREX® PEEK injection molding materials. According to a release from Victrex, the polymeric advancement enables engineers to design stronger, lower cost components that are up to 60 percent lighter than typical metal and thermoset systems. By working together, Victrex and Tri-Mack Plastics Manufacturing Corp. have engineered an aerospace bracket using the new polymer and technique with the demanding performance requirements of loaded applications in mind.

The development of technologies for the aerospace industry is making significant progress, not only from a material perspective, but from a processing standpoint as well. Engineers are requiring lightweight, complex parts at lower costs, higher processing efficiencies, and improved mechanical properties, all of which can be delivered by using the hybrid molding process, according to Victrex. The company, known for its work with PAEK (polyaryletherketone) polymers, has collaborated with Tri-Mack Plastics, a prominent molder of high-temperature thermoplastic resins and composites for the aerospace sector, to deliver what it calls “unique structural aircraft solutions.”

Commercial aircraft use thousands of brackets from the cockpit to the tail of the plane. The total amount of brackets on an aircraft can add a significant amount of weight, especially if they are made from metal. The hybrid-molded, VICTREX PAEK-based composite bracket is reportedly able to deliver up to 60 percent weight savings compared to stainless steel and titanium while offering equivalent or better mechanical properties, such as strength, stiffness, and fatigue.

“These technologies are enabling engineers to design lighter, stronger and more cost-effective solutions like the new bracket,” said Victrex Aerospace Strategic Business Unit Director Tim Herr, in the release. “This game-changing advantage over metals and thermoset composites is a result of our dedication to the future of flight.”

Tri-Mack has a long-standing relationship with Victrex in the development of high-performance aerospace components using PAEK polymers.

“Given our expertise in the industry, we were excited to use a new polymer and process to develop an innovative product,” said Tom Kneath, director of sales and marketing for Tri-Mack. “The design flexibility of the materials, along with the technical support from Victrex, enabled us to engineer and manufacture a PAEK bracket that can be produced in minutes compared to the hours it would take for a metal or thermoset equivalent.”

This improvement in manufacturing efficiency translates into less processing time, lower energy requirements, and reduced waste for Tri-Mack. Those benefits, paired with eliminating steps such as edge sealing and X-ray inspections, help to reduce overall part costs. But the benefits are not limited to aerospace designs: The overall mechanical properties, weight savings, and processing efficiencies are said to offer a step-change for the automotive, energy, and consumer electronics industries as well.

Tri-Mack Plastics Manufacturing (, located in Bristol, Rhode Island, is an engineering and manufacturing company that specializes in high temperature thermoplastics and thermoplastic composites. Tri-Mack's manufacturing capabilities include automated composite processing, injection molding, tool making, multi-axis machining, bonding and assembly. ISO 9001:2008 and AS9100 certified, Tri-Mack serves the aerospace, industrial equipment, chemical processing, and medical industries.

This technical information has been contributed by
Tri-Mack Plastics Manufacturing

Home |  About Us |  Back To Technical Library |  Contact Us
Copyright © 1996-2010 All Rights Reserved.
General or Technical Questions? E-mail