Method of making heater cable of self-limiting conductive extrud

Details Method of making heater cable of self-limiting conductive extrud Method of making heater cable of self-limiting conductive extrud

1978-01-11

1981-09-01

Kucia, Richard R.

Metal working

Method of mechanical manufacture

Electrical device making

29610, 264105, 264346, 338214, H05B 0310

Patent

active

042863767

ABSTRACT:
Described herein are self-regulating conductive articles comprised of an extruded length of polymeric material containing not more than about 15% by weight conductive carbon black, the resistivity of the extrudate following prolonged exposure to temperatures in excess of the crystalline melting point or range of the polymeric matrix in which the black content satisfies the equation:

REFERENCES:
patent: 2905919 (1959-09-01), Lorch
patent: 3435401 (1969-03-01), Epstein
patent: 3760495 (1973-09-01), Meyer
patent: 3793716 (1974-02-01), Johannsen
patent: 3823217 (1974-07-01), Kampe
patent: 3861029 (1975-01-01), Johannsen
patent: 3914363 (1975-10-01), Bedard
Birks, Modern Dielectric Material, 1960, Heywood & Co., London, p. 105 relied on.

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