Melt-spun ceramic fiber filter and method
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United States of America Patent
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Mar 1, 2005
Grant Date -
Jun 5, 2003
app pub date -
Dec 3, 2002
filing date -
Dec 4, 2001
priority date (Note) -
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Abstract
A method for making high temperature filter media is provided by melt-spinning a plurality of fibers of preceramic thermoplastic polymer to form a nonwoven textile web of the fibers, curing and cross-linking the thermoplastic polymer to a thermoset polymer, and thermally decomposing the thermoset polymer to ceramic. Between the melt-spinning step and the curing step, the web is formed to a filter pre-form in a green state while still pliable and malleable. The filter pre-form is cured without re-melting the thermoplastic polymer and without destroying morphology.
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