HIGH TEMPERATURE INSULATING TAPE AND WIRE OR CABLE SHEATHED THEREWITH
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United States of America Patent
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Issued Date -
Mar 14, 2013
app pub date -
May 18, 2011
filing date -
May 18, 2010
priority date (Note) -
Abandoned
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Abstract
A composite insulating tape (20) comprises a laminate or co-extrusion of at least two layers, including an insulating first layer (24) of a polymer matrix in which mica particles are dispersed and a second layer (26) of a polymer containing aromatic and/or heterocyclic rings and having a melting point of at least 350° C. and a glass transition temperature of at least 150° C. The tape can be used to form a multilayer coating on a conductor (10) such as an electric wire. An outer protective layer (28) of a fluoropolymer such as PTFE may be applied around the wrapped tape, by wrapping or extrusion.
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