Lms Consulting Group, LLC

Lee M Sisler

Richard C Abbott

Shuyong Xiao

A positive temperature coefficient (PTC) composition having a first thermally active polymer having a melting point of 30-70&#xb0; C. and providing a first PTC in a lower temperature range below 70&#xb0; C., and a second thermally active polymer having a melting point of 70-140&#xb0; C. and providing a second PTC in a higher temperature range above 70&#xb0; C., the composition also having conductive particles; and an organic solvent with a boiling point higher than 100&#xb0; C., solvent being capable of dissolving both the first and second thermally active polymer. The PTC composition has two distinct PTC characteristics at the two different temperature ranges.

Electrically conductive PTC ink with double switching temperatures

An article comprising a double-switching heater that comprises a double-switching PTC ink deposited on a flexible substrate to form one or more resistors. The double-switching PTC ink comprises a first resin and a second resin; the first resin provides a first PTC effect within a first temperature range (T1, T2); the second resin provides a second PTC effect within a second temperature range (T3, T4), where T3&#x2265;T2; the first resin has an NTC effect above the first temperature range; the second PTC effect is greater than the first PTC effect; and the second PTC effect overlaps with, and is greater than, the NTC effect of the first resin. The substrate can be either thermal polyurethane, nylon or a polyester blend.

Electrically conductive PTC ink with double switching temperatures and applications thereof in flexible double-switching heaters

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.

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Marion, OH, United States of America

Lee M Sisler