"Avoiding moisture ingress
has been and will continue to be the first line of defense in preventing
brittle fracture. Insulator manufacturers
like MacLean Power Systems can now take full advantage of boron free glass
fibers and also have wicking performance comparable to standard E-glass. Traditional copper wires and cables have large
conductors that can easily allow heat to escape from the rover electronics
module, threatening a shortened mission life.

grp vartm

These high-tech materials provide the same solutions so that today's
rovers have more space for additional scientific payload. Pyralux (R)
flexible circuits connect the "brain" of the rovers to their parts - the
robotic arm, cameras , high gain antenna, wheels and sensors.
Hundreds of Kapton(R) strip heaters are used throughout the rovers for
thermal control, ensuring critical warmth needed to maintain operations in the
extremely cold Martian atmosphere. They are wrapped around each of the motors
on the robotic arm to keep the motors and gearboxes running at optimum
temperature and efficiency.dupont.com/dupontglobal/corp/images /US/en_US/news/releases/media/d
ynamicdesign2.tif

pultruded reinforcements

Advantex(R) Type30(R) Roving Provides Non-Corrosive, Dielectric Properties
for Pultruded High-Voltage Electrical Transmission + Distribution Applications;
Prevents Brittle Fracture

PARIS, At the JEC Composites Show, Owens Corning
today introduced SE 8400 LS, a new single-end Type 30(R) roving to meet the
demanding electrical requirements for such pultruded FRP applications as
medium- and high-voltage transmission and distribution (T+D) long-rod
insulators.
Kapton(R) film works with layers of DuPont(TM ) Teflon(R) fluoropolymer
resin and Pyralux(R) flexible cables to provide power from the Rover
Electronics Module to the hardware components in the rovers.

DuPont(TM) Pyralux(R) brand flexible laminates are used to connect the
"brains" of the rovers to their parts (photos-Dynamic Design International ),
as they do in more familiar applications, like the display driver(1) and hinge
circuits(2) in a flip phone(3) (cell phone photo-DuPont):

1.

vinly phenolic

Brittle fracture is a primary concern of the utility
engineer when evaluating the use of composite insulators," said James
Schmiedeknecht , VP International Sales and Marketing at MacLean Power Systems.

reinforcements phenolic

(R) Owens Corning and Advantex are registered trademarks of Owens Corning. On Apollo
missions to the moon, 20 of the 21 layers in each space suit were made with
DuPont materials, including DuPont(TM) Mylar(R) polyester film , neoprene and
Kapton(R).

pilings vinly

vetrotex rrim

5 seeds/gram.
The properties of SE 8400 LS single-end Type 30 roving offers not only the
required exceptionally high electrical resistance from low seed production but
also:

* higher corrosion and temperature resistance of Advantex over
conventional E-glass, reducing brittle fracture failure
* quicker processing than alternatives owing to fast wet-out in polyester,
vinyl ester and epoxy resins
* low migration for improved wet-out and glass to resin bonding
* improved flashover resistance in highly polluted areas
* high mechanical strength (weight ratio)
* greater design flexibility and overall system costs reduction

"While the industry has been working with non-ceramic insulators for
several years, developing and ensuring the consistent manufacture of a non-
corrosive, boron-free glass with seed counts well below . "That's the same trend you can see
and feel in everyday products like lighter, thinner cell phones, yet these
smaller, more advanced electronics are much more powerful.com/dupontglobal/corp /images/US/en_US/news/releases/media/c
ellphone_circuitry.

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6 billion in
2004.

prepregs pilings

Other DuPont inventions have contributed to space exploration.
DuPont (NYSE: DD) is a science company.com /dupontglobal/corp/images/US/en_US/news/releases/media/d
ynamicdesign1.dupont.

cyanate wolfden

The 52 yield requires fewer ends
of roving to produce a part of equal glass content, a significant advantage
for pultrusion manufacturers with building or creel size restrictions, who
wish to produce larger parts.
The JEC Composites Show (5-7 April, 2005) is known as the global venue for
the introduction of new technologies in composites and is held annually at the
Expo Porte de Versailles, Paris, France. Founded in 1938, the company had sales of $5.
The cameras beaming clear, high resolution signals back to Earth can do so
in part because the Pyralux(R) flexible circuits were made using DuPont(TM )
Riston(R) dry film photoresists and ImageMaster(TM) phototooling films that
provide reliable fine-line circuit images, ensuring consistent quality signals
and performance.
http://www1.

wharfs pultruded

SE 8400 LS combines the anti-corrosion, electrical, and
mechanical benefits of boron free Advantex(R ) E-glass manufactured using
state-of-the-art glass melting technology and advanced low-seed filament
technologies, ensuring seed levels well below .
MacLean Power Systems can now offer the utility engineer that extra margin of
safety at a relatively low incremental cost," Schmiedeknecht concluded . Owens Corning is exhibiting in
Hall 1 Booth M42/N55.
Consumers will find the same DuPont technologies enabling cell phones,
plasma display panels, personal digital assistants (PDAs), video camcorders,
laptop computers and digital cameras, among others.
"DuPont materials have enabled manned and unmanned missions into space for
almost half a century," said Craig G.

honeycombs pultruded

rtm composites

"Owens Corning has solved that problem with their Advantex corrosion
resistant E-glass fiber that is low in seed count.
Owens Corning SE 8400 LS roving is available in 113 yield (4400 TEX), 103
yield (4800 TEX), and 52 yield (9600 TEX).

composites vartm

Owens Corning Introduces New SE 8400 Low Seed Single-End Continuous Roving for High-Voltage Applications

WILMINGTON, Del. Their
durable parts help keep them going, enabled by DuPont science. Kapton(R) strip heaters
significantly reduce that risk and allow the rovers to use smaller solar
panels and batteries. In addition,
the Space Station's wings used Kapton(R) to absorb UV rays.

composites honeycombs

The Mars rovers
include almost 70 yards each of flexible circuits made of thin DuPont(TM)
Pyralux(R) laminates and composites. Naylor, group vice president, DuPont
Electronic + Communication Technologies.

The DuPont Oval, DuPont(TM), The miracles of science(TM), and Pyralux(R),
Kapton(R), Riston(R), ImageMaster(TM), Teflon(R), Kevlar(R), Nomex(R) and
Mylar(R ) are registered trademarks or trademarks of DuPont or its affiliates.

uhmwpe vinly

Metallized Kapton(R) is used in thermal shielding for heat-sensitive
components.
In addition to the rovers, satellites orbiting Earth today provide clear
communications because of thin, lightweight and durable Pyralux (R) flexible
circuits. Operating in more than
70 countries, DuPont offers a wide range of innovative products and services
for markets including agriculture, nutrition, electronics, communications,
safety and protection, home and construction, transportation and apparel.

vartm grp

"The major insulator manufacturers have paid particular attention to sealing
the end fitting of the FRP rod, silicone rubber housing junction and several
have designed redundant seal systems."
DuPont electronic materials provide key benefits such as volume and weight
savings, in addition to the bend and twist flexibility. Founded in 1802, DuPont puts
science to work by creating sustainable solutions essential to a better,
safer, healthier life for people everywhere.

wharfs pilings

5 inches. The airbags, so critical to the rovers' successful landings, are
threaded and reinforced with DuPont(TM) Kevlar(R) brand fiber. Kevlar(R) also was used
on the Galileo probe to Jupiter, which included a parachute made of Kevlar (R),
and at the International Space Station, where a blanket made of Kevlar(R) was
used to wrap its inner walls to protect from micrometeorites.
DuPont Electronic + Communication Technologies is a leading supplier of
electronic materials, fluoropolymers, fluorochemicals and imaging
technologies .tif
2.tif
3.

vectran autoclave

Owens Corning is a world leader in building materials systems and
composite systems.com .
The Mars Exploration Rovers - Spirit and Opportunity - both contain
critical parts made from materials developed by DuPont Electronic +
Communication Technologies .

valspar vectran

"The use of boron free glass fibers has been a long acknowledged means of
preventing brittle fracture if an insulator's housing has been breached., One year to the month
after Spirit and Opportunity landed on Mars, the Rovers are still roaming the
planet, sending back crystal-clear images of the Martian surface.

cyanate aramid

dupont.

honeycomb autoclave

By replacing bulky round wires and
cables, these materials can provide a volume savings of between 60 percent and
70 percent.
http://www1.

autoclave pultruder

5 seeds per grams has
been the 'tipping point' level this marketplace needs to transform to a new
technology -- and SE 8400 truly delivers that solution," said Wisdom Dzotsi,
Owens Corning Global Product Manager, T30 Direct Roving.
However, earlier generations of boron free fibers had seed count levels that
were too high and wouldn't consistently pass qualification tests mandated by
insulator standards," continued Schmiedeknecht.

DuPont Electronic Materials Keep Mars Rovers Going One Year Later; High-Tech Materials Connect the `Brains' of Spirit + Opportunity to Their Parts

Stacked, they would total less than 1.

vinly pultruded

Minimizing
microscopic bubble voids or "seeds" in the glass avoids the formation of
hollow filaments, which increase conductance, offering the path of least
resistance to the electrical energy , and causing system failure.
After extensive beta testing, customers agree. Since the birth of manned space flight more than
four decades ago, DuPont has been along for the ride with products essential
for lighter weight, reduced volume, durability and environmental resistance. DuPont electronic
materials make these products smaller and more durable, while allowing them to
do more, faster and better. The flexible
joints of the robotic arm, which must withstand repeated bending in extreme
environments, use Kapton(R) and Pyralux(R). Today's suits include fewer layers but many of the same products,
in addition to Nomex(R) and Kevlar(R) branded fibers.
http://www1.

reinforcements autoclave

Additional information is available on Owens Corning's Web site at
http://www.owenscorning.
Pressure-sensitive tape made of DuPont(TM) Kapton(R) polyimide film is
used throughout the rovers to control vibration. Pyralux(R) flexible cables
secured with Kapton(R) tape offer durable, lightweight environmental
resistance for the temperatures on Mars, ranging from minus 120 degrees
Centigrade (minus 184 degrees Fahrenheit ) to 22 degrees C (72 degrees F).