Process for producing insulations for electrical conductors by means of powder coating
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United States of America Patent
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-
Sep 13, 2005
Grant Date -
Jun 19, 2003
app pub date -
Dec 21, 2000
filing date -
Dec 28, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for producing insulations for electrical conductors by powder coating, which results in aging which is improved compared to glass-mica or casting-resin insulation, and a powder which is suitable for such a process. The powder is applied a number of times in succession, in the form of individual layers which follow one another, until a layer thickness of ≦10 mm is reached, and each of the individual layers undergoes intermediate heat curing before the next individual layer is applied. The intermediate curing of each individual layer uses a curing time which corresponds to 2-10 times the gel time of the powder used. Finally, the entire insulation undergoes final curing. The result of an electrical life test carried out on various specimens insulated with epoxy-resin powder which contains fine filler.
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