Cable with flame retarded cladding
US4659871A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1986 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Jun 24, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2958
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Polymeric cladding for elongate substrates, preferably electrical conductors, comprises an inner layer and an outer layer, the outer layer being a cross-linked polymer composition filled with halogen-free particulate inorganic flame-retardant filler which has been treated with material which increases the elongation to break of the composition at 200.degree. C. to at least 50%. The enhanced elongation enables the cladding better to resist burning, possibly by reducing the tendency for the outer layer to split when exposed to fire. Bundles of insulated electrical wires may be wrapped in mineral tape, preferably mica tape, to provide circuit integrity cables which are significantly smaller and/or lighter than previously known.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.