Patent ID: 7202445
Filing Date: 2007-04-10
Classification: B60R,H05B

Abstract:
1. A door mirror heater compliant to a high voltage battery of 42 V having a heat generating circuit provided with a PTC layer corresponding to a heating element and electrodes for applying a current to said PTC layer, wherein an initial resistance value of said heat generating circuit is set between 50 and 100 Ω, a lower limit value of a PTC characteristic R 100° C. /R 25° C. is set to 50, an EPDM rubber is added to an ethylene-acrylic acid copolymer (EAA) of said PTC layer and blended homogeneously, and a carbon and a titanium oxide are added as a filler at a rate of filler total amount between 20 and 30 vol %.