PTC composition and manufacturing method therefor
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United States of America Patent
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Dec 20, 1994
Grant Date -
N/A
app pub date -
Sep 15, 1992
filing date -
Sep 26, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for making a PTC element grafts a crystalline polymer to conductive particles to form a PTC composition. The step of grafting including solution polymerization. The PTC composition is formed into a PTC element. The PTC element is cross-linked after forming. The PTC element according to this invention exhibits superior PTC behavior when the temperature of the PTC element reaches the crystal melting point of the crystalline polymer.
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