Expanded polymer material for cryogenic applications apparatus and method
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United States of America Patent
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Issued Date -
Oct 9, 2008
app pub date -
Apr 5, 2007
filing date -
Apr 5, 2007
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Abandoned
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Abstract
A structural and insulating material for cryogenic power transformers uses nonwoven fibers, such as polyester matting, embedded within epoxy made highly porous with a blowing agent. The open cell foam of the material is characterized by controlled pore size and density, tolerance of extreme thermal gradients, and strength at cryogenic temperatures, and is selected for compatibility with dielectric fluids such as liquid nitrogen and cryogenic blends.
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