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High performance polyamide materials
Manufacturing News Center
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The initial Zytel® CDV offering consists of four grades using PA66
in both standard and modified form or PA612 as base polymers. Parts
made from these grades can meet resistivity recommendations (106 ohm
cm, maximum) of the latest SAE J1645 standard.
Additional resins are in advanced stages of evaluation and development,
including high performance polyamide materials, according to Fish.
Grade designations and relative properties of commercial grades are
shown in the table below.
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Stability of dimensions and properties under different
humidity conditions.Consult product literature available from
DuPont for details. |
When diesel fuel gets hot, Delrin® keeps going New Delrin® 560HD has
what it takes to withstand diesel fuel at the 90°C-or-higher temperature
of pressurized fuel burned in the emerging generation of low-emission
diesel engines.
"Acetal polymers like Delrin® have become the preferred material for
many conventional fuel system applications," said Mike Day, development
programs manager at DuPont Engineering Polymers. "Now with new hot-diesel-resistant
Delrin®, fuel system suppliers and OEM's have the ability to continue
the use of acetal polymer even for feeding hot diesel fuel as seen in
engines using direct unit injection and common rail technology. Delrin®
560HD is an economical but sufficiently durable alternative to metal
and higher-priced polymers for components of such systems," he added.
Potential applications include fuel pump reservoirs, connectors, the
tank flange and related parts, according to Day.
In tests conducted with a very aggressive diesel fuel at 100°C, test
specimens made of the new resin outperformed both a standard acetal
and several other acetal resins promising improved hot diesel resistance.
After 336 hours, for example, Delrin® 560HD retained 98 percent of its
original mass while only 20 percent of a standard acetal specimen remained.
In addition to the newly available Zytel® CDV conductive nylons and
hot-diesel-resistant Delrin®, DuPont offers a range of viable polymer
materials and technologies for fuel vapor systems, storage and transfer
and emission control. For more information visit www.automotive.dupont.com
and/or plastics.dupont.com, or call 1-800-533-1313.
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Source: DuPont is a science company. Founded in 1802, DuPont puts science
to work by solving problems and creating solutions that make people's
lives better, safer and easier. Operating in more than 70 countries, the
company offers a wide range of products and services to markets including
agriculture, nutrition, electronics, communications, safety and protection,
home and construction, transportation and apparel.
The DuPont Oval, DuPont™, The miracles of science™, Delrin® and Zytel®
are registered trademarks or trademarks of DuPont or its affiliates.
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conductive nylon, conductive materials,
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