US Patent:
20190318852, Oct 17, 2019
Inventors:
- Marion OH, US
Lee M. Sisler - Marion OH, US
Richard C. Abbott - New Boston NH, US
International Classification:
H01C 7/02
C09D 11/107
E04C 2/52
H01C 7/04
C09D 11/10
A41D 13/005
H05B 3/12
C09D 11/037
C09D 11/104
C09D 11/106
C09D 11/108
C09D 11/52
F25C 1/22
H01L 49/02
Abstract:
A double-switching heater includes a double-switching PTC ink deposited on a substrate to form one or more resistors. The double-switching PTC ink has a first resin that provides a first PTC effect at a first temperature range and a second resin that provides a second PTC effect at a second temperature range, where the second temperature range is higher than the first temperature range. The substrate may be a flexible substrate or a rigid substrate, and may bedeformable to generate a three-dimensional structure. The substrate may be: polyester, polyimide, polyamide, polypropylene, thermoplastic polyurethane, fiberglass, cement board, carbon composite materials, polyethylene terephthalate, polyethylene, aluminum, steel, glass composite, molded plastic, high-density polyethylene or styrene ethylene butylene styrene.