Polymer developments for demanding automotive applications

| Manufacturing

Highly protective material for automotive hoses

Two new polymers for blow moulding released to meet the high temperature and chemically aggressive environments of modern automotive power trains.

DuPont Performance Polymers (DPP) has responded to the automotive industry’s request for materials that can stand up to long term exposure to heat and gases in turbo-charged environments with DuPont Zytel LCBM6301 and DuPont Hytrel HTR8797.

Zytel LCBM6301 is a long-chain blow moulding PA612-HI polyamide grade with enhanced acid and thermal resistance versus flexible PA6 and better thermal resistance than PA12 targeted for flexible automotive air ducts, positive crankcase ventilation (PCV) tubes and exhaust gas recirculation (EGR) sensor tubes. The new grade fulfils auto industry calls for higher durability materials that can operate in the more aggressive temperatures and gases generated by the latest compact turbo charged diesel and petrol engines, while helping to meet CO2 and NOx emissions limits.

Hytrel HTR8797 TPC-ET is a flexible, blow-mouldable resin that more than doubles the 130C-150C air oven ageing durability of previous Hytrel grades specified for cold side blow moulded auto air duct applications.

“Both Zytel LCBM6301 and Hytrel HTR8797 have been developed to answer the most recent automotive air induction challenges that ask tough questions of materials producers in terms of product durability in hot and chemically aggressive environments,” said Patrick Cazuc, automotive marketing leader, DuPont Performance Polymers. “At DuPont, product line improvement is a constant process and is part of our commitment to support the automotive industry in its quest to meet CO2 emissions targets. Blow moulding is a centre piece of our offering to automotive customers, especially for air management applications

Both the Zytel and Hytrel products are process friendly, plasticiser-free grades for easy blow moulding processing on existing equipment and are up to 50% recyclable without impacting final properties and productivity. In addition, either of the new grades can offer valuable lightweighting opportunities, enabling one integrated part to replace several metal/rubber/plastic components.

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