Conductive composite material with positive temperature coefficient of resistance and overcurrent protection component
US8653932B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2010 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Sep 13, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A PTC conductive composite material and the overcurrent protection device made of the material are disclosed. The PTC conductive composite material includes: (a) A matrix of crystalline polymer material at least, occupies 20%-70% of the volume fraction of the PTC conductive composite material, (b) One kind of conductive filler occupies 30%-80% of the volume fraction of the material. The solid solution conductive filler is uniformly dispersed in the polymer material, whose average particle size ranges from 0.1 μm to 10 μm, and the volume resistivity is no more than 300 μΩ·cm. The overcurrent protection device prepared by using the PTC conductive composite material as described above includes two metal foils, which are made into a sandwich, separated by a layer of the PTC conductive composite material.And the advantages of the overcurrent protection device of the invention are low resistance, good reproducibility of resistance and well PTC intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.