Patent ID: 6111234
Filing Date: 2000-08-29
Classification: H05B

Abstract:
An elongate heater which passes the VW-1 flame test and which comprises(1) a core which comprises a resistive heater element which comprises a conductive polymer composition which exhibits PTC behavior;(2) a first insulating jacket which(a) surrounds the core, and(b) is composed of a first insulating material comprising an organic polymer; and(3) a second insulating jacket which surrounds and contacts the first insulating jacket;the components of the heater being such that (a) a heater which is substantially identical, except that it does not contain the second insulating jacket, fails the VW-1 flame test, and (b) a heater which is substantially identical, except that it does not contain the first insulating jacket, fails the VW-1 flame test.