Electrically conductive PTC ink with double switching temperatures and applications thereof in flexible double-switching heaters
US10373745B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2017 |
| Grant date | Aug 6, 2019 |
| Priority date | — |
| Expiry date | Feb 24, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/026
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.