ELECTRIC MOTOR INSULATING SHEET AND A MANUFACTURING METHOD THEREFOR
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United States of America Patent
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Issued Date -
May 24, 2012
app pub date -
Jun 11, 2010
filing date -
Jun 22, 2009
priority date (Note) -
Abandoned
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Abstract
An insulation sheet for electric machine that forms slot insulation sheet is configured by an aramid paper and a PPS film directly pressure laminated without use of an adhesive. This means that no adhesive layer interposes the aramid paper and PPS film. PPS film is less costly as compared to a polyimide film and possesses better thermal properties such as higher heat emissivity and is highly resistant to heat. Thus, high strength is maintained even when subjected to high temperature over extensive time. Further, because the aramid paper and PPS film are laminated directly without an adhesive layer, the laminate is reduced in thickness. This allows further thinning of the laminate.
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