Devices comprising ptc conductive polymers

Details Devices comprising ptc conductive polymers Devices comprising ptc conductive polymers

B - Operations, Transporting

29

C

309/105, 309/84

B29C 61/06 (2006.01) H01C 7/02 (2006.01) H05B 3/14 (2006.01)

Patent

CA 1262467

DEVICES COMPRISING PTC CONDUCTIVE POLYMERS Pravin L. Soni Peter H. van Konynenburg Mark Wartenberg Randolph W. Chan Stephen M. Jacobs ABSTRACT OF THE DISCLOSURE Heat-recoverable electrical devices, particularly for covering telephone and other cable splices, comprise (a) a component composed of a PTC conductive polymer which has little or no cross-linking, 12) an adjacent heat-recoverable component composed of a PTC or ZTC conductive polymer which has a relatively high level of cross-linking, and (3) electrodes which can be connected to a power supply so that current passes through the components and causes recovery of the device. Preferably a continuous laminar PTC component having little or no crosslinking is sandwiched between two crosslinked continuous laminar ZTC components. Such a device is illustrated in Figure 1.

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