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News

New DuPont Engineering Polymers technologies announced

Du Pont Engineering Polymers : 01 May, 2001  (New Product)
DuPont Caltrel is a system technology for heat transfer in heating, cooling and refrigeration systems for buildings, retail displays, automobiles and other uses. Caltrel fluid energy transfer systems eliminate metal tubes and fins. Instead, they use nylon-based tubing with thin (0.4 mm) walls to convey heat transfer fluid and dissipate heat.
DuPont Engineering Polymers' Vice President of Technology, Bill Hsu unveiled four new technologies at the business's Pre-Kunstoffe press conference today.

Caltrel fluid energy transfer systems
DuPont Caltrel is a system technology for heat transfer in heating, cooling and refrigeration systems for buildings, retail displays, automobiles and other uses. Caltrel fluid energy transfer systems eliminate metal tubes and fins. Instead, they use nylon-based tubing with thin (0.4 mm) walls to convey heat transfer fluid and dissipate heat.

Hsu said: 'In replacing conventional metal heat exchangers, Caltrel technology delivers some significant benefits. It eliminates corrosion, saves space, weighs much less (particularly important for automotive applications) and has the potential to save costs. The first applications are expected in 2002 in the heating, ventilation, air conditioning and refrigeration equipment markets.'

Solutions for 42 volt electrical systems in cars
Upcoming 42 volt electrical systems in cars will allow the use of electrical power for more devices and will entail sharp increases in the number of sensors, solenoids and motors. Hsu described a number of specific developments to satisfy the new specification, including a new translucent grade of Zytel nylon resin to replace polyethersulfone for the casings of 42-volt circuits.

Zytel WRF wear/friction solutions
DuPont's new family of Zytel WRF resins have enhanced wear and friction characteristics meet the needs of gears in electrically-powered devices. These resins are glass-reinforced nylons, modified with various levels of Teflon micropowder and a supertough nylon also containing Teflon . The resins complement and extend the wear and performance capabilities of DuPont's Delrin acetal resin family.

Multi-layer structures for reduced evaporative emissions
Hsu also had good news about DuPont research to reduce evaporative emissions from the fuel system. DuPont has developed a new system solution that allows manufacturers to meet new California automotive emission requirements. It involves the use of multi-layer structures for fuel lines, the fuel tank and other elements of the system. Zytel nylon resins provide the structural component. Either Zenite LCP or Tefzel ETFE provide the required high-barrier properties in very thin layers. And DuPont Bynel technology can provide the glue to hold the structure together.

Hsu said: 'No other polymer supplier has so much to offer OEMs and tier one suppliers in reducing evaporative emissions as DuPont Engineering Polymers. Our materials process technology allows very low emissions and a lower system cost than the alternatives we know of. It offers opportunities for space-saving designs using flexible fuel lines or fuel tanks shaped to eliminate wasted space. And because ours is a total solution, our customers are freed from the burden of coordinating the development efforts of multiple suppliers.'
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