Manufacturing process of flexible heaters using high resistance magnification and positive temperature coefficient ink

Abstract

There is provided a process of manufacturing an article comprising: depositing a double-resin ink on a flexible substrate to form a flexible heater, wherein the double-resin ink comprises (i) a first resin comprising a crystalline or a semi-crystalline polymer; and (ii) a second resin comprising a non-crystalline polymer, wherein the double-resin ink has a positive temperature coefficient (PTC) and 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.; encapsulating the flexible heater in a dielectric ink; and inserting or attaching the flexible heater to an article selected from the group consisting of: heating pads; heat wraps; heated blankets; heated throws; heated body pillows; and heated mattress pads.

Dependencies are inferred from the claim text.