Self-limiting conductive extrudates and methods therefor

Electric heating – Heating devices – With heating unit structure

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219544, 338 22SD, 29611, H05B 310

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active

049546953

ABSTRACT:
Self-regulating articles, particularly heaters, containing two spaced-apart elongate electrodes which are joined together by a melt-extruded element composed of a conductive polymer. The conductive polymer is a dispersion of carbon black in a crystalline polymer, has a resistivity at room temperature of R ohm-cm, and contains L % by weight of carbon black, L being not greater than about 15, and L and R being such that

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