| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible PTC heating element which can be used for a long period without the occurrence of folding wrinkles etc. at the heating element even when a repetition load is applied. SOLUTION: The flexible PTC heating element is composed of a base material 3 obtained by laminating a first resin layer 1 and a first fiber layer 2; a pair of electrodes 4 formed on the surface of the resin layer 1 of the base material; a PTC resistor 5 formed on the surfaces of the pair of electrodes 4; a covering member 9 which covers the whole surface of the base material 3, the pair of electrodes 4, and the PTC resistor 5, and which is obtained by laminating a second resin layer 7 and a second fiber layer 8 which are fusible thermally, on the first resin layer 1; and a pair of power feeder 6 formed at the ends of the pair of electrodes. A plurality of stress relief 10 which relieve stress are provided at a part of the flexible PTC heating element. COPYRIGHT: (C)2007,JPO&INPIT
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