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DuPont releases new thermoplastic for automotive components

DuPont Transportation & Advanced Polymers, a newly formed business segment within DowDuPont’s Specialty Products Division, is introducing DuPont Hytrel HTR8745 BK320, a new grade of TPC-ET developed for blow moulding of constant velocity joint (CVJ) inboard boots.

An industry leader in co-polyester elastomer solutions for CVJ boots, DuPont has engineered a next-generation, high-performance thermoplastic elastomer with excellent heat and fatigue resistance.

“Introduced in 1984 for automotive CVJ outboard boots, Hytrel is the industry standard for excellent balance of grease resistance, high-temperature durability, low-temperature flexibility and historically proven performance,” said Laurent Lefebvre, marketing manager, DuPont Transportation & Advanced Polymers.

“This next-generation material for blow moulding builds on a proud heritage and provides further advancements specifically for CVJ inboard boot applications.”

The company says the benefits include: Improved processing (press blow moulding, injection blow moulding) with low die swell and better parison stability; Good thermal resistance up to 140°C; Flex-fatigue resistance for long boot life; Abrasion resistance for high-angle installation with compact boot designs.

DuPont Hytrel is also used for other automotive powertrain and chassis applications such as air ducts, steering rack & pinion boots and propeller shaft boots.