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The coefficient of linear thermal expansion of pure PTFE varies considerably with temperature. This can cause problems with the dimensioning and practical use of components constantly exposed to changing temperatures.
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Increasing amounts of Ceramer as reinforcing material in PTFE not only reduces the dependence of the coefficient of the linear thermal expansion on temperature, but also lowers its absolute value. This makes it much easier to dimension components, whose shape will tend to change less with the changing ambient temperatures.
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Ceramer
content in
PTFE [%]
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Coefficient of linear thermal expansion [10-6 K-1]
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10 - 30 °C
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30 - 100 °C
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100 - 170 °C
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170 - 270 °C
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