Temperature self-regulating resistive heating element

Details Temperature self-regulating resistive heating element Temperature self-regulating resistive heating element

1985-08-16

1987-05-26

Jordan, M.

Electric heating

Heating devices

With heating unit structure

219553, 338 22R, H05B 312

Patent

active

046688579

ABSTRACT:
Disclosed is an improved temperature self-regulating resistive heating element and a method for its fabrication. The element utilizes a positive temperature coefficient (PTC) composition comprising a blend of two partially incompatible crystalline polymers of differing melting points and an electrically conductive filler. The PTC composition does not deform during annealing, this permitting the fabrication of temperature self-regulating resistive heating element with electrodes spaced-apart by not more than 0.100 inch. Heating elements provided by the invention have a smaller cross section, are more flexible, and are less expensive to fabricate than similar prior art elements.

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