Vespel®
Because of it's broad operating temperature range and
high melting point (cryogenic temperatures to 550 degrees Fahrenheit),
Vespel® is considered one of the
highest performing engineering plastics available. For the last 2
decades it has been the choice of manufacturing engineers and
maintenance managers who are concerned with reliable equipment and
reduced down time. Vespel® parts
can be found in automobiles, aircraft, business machines and electric
devices, etc. Vespel® parts
provide: Wear resistance that can withstand dry pressure velocity
values to 300,000 psi-fpm. Broad operating temperature range.
Load-carrying capabilities at high temperatures while retaining
resistance to creep. Low thermal and electrical conductivity.
Machineability without special equipment.
There are five compositions of SP polyimide resin
Vespel® shapes to choose from:
SP-1 is the unfilled base resin which provides the maximum physical
strength, elongation and toughness and best electrical and thermal
insulation properties. SP-21 has 15% graphite, by weight, added to the
base resin for low wear and friction. SP-21 has the most physical
strength, elongation and toughness of the graphite filled resins. SP-22
has 40% graphite, by weight, added to the base resin that provides
increased resistance to wear and friction and has the lowest coefficient
of thermal expansion. SP-211 has 10% Teflon®
resin and 15% graphite, by weight, added to the base resin to provide
the lowest coefficient of friction over a wide range of operating
conditions. SP-3 has 15% molybdenum disulfide, by weight, added to the
base resin to provide the best wear and friction resistance in
moisture-free and vacuum environments. In these conditions graphite will
actually become abrasive.
These compositions provide excellent temperature
resistance, high wear resistance, dimensional stability, resistance to
radiation, extremely low outgassing and relatively ease of machineabilty. Available data
and MSDS in pdf format [3.35
MB].
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