Patent ID: 11859094
Assignee: LMS CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. An article comprising a heater, the heater comprising:
a double-resin ink having a positive temperature coefficient (PTC) deposited on a flexible substrate to form one or more resistors; wherein:
the flexible substrate is thermoplastic polyurethane, nylon, or a polyester blend;
the double-resin ink comprises: a first resin comprising a crystalline or a semi-crystalline polymer; and a second resin comprising a non-crystalline polymer, wherein the first resin provides a first PTC effect in a first temperature range and the second resin provides a second PTC effect in a second temperature range, the second temperature range being higher than the first temperature range; and
the double-resin ink has a resistance magnification of at least 20 in a temperature range of at least 20° C. above a switching temperature of the double-resin ink, the resistance magnification being defined as a ratio between a resistance of the double-resin ink at a temperature ‘T’ and a resistance of the double-resin ink at 25° C.