Electric and communication cables
US5310964A · kind A · utility
22Cited by
14References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Jul 23, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B7/295
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cable comprising a core enclosed in an external sheath of a char-forming low-smoke-and-fume composition is characterized by a tape of flexible mineral material, preferably a woven glass-fiber tape, wrapped round the core and by an adhesive bonding the tape to the sheath. Hot-melt adhesives based on ethylene/vinyl acetate copolymers with tackifier resins are suitable. By bonding the sheath to the underlying tape, retention of the charred remains of the sheath under fire conditions is considerably improved with consequent improvements in flame retardance, smoke levels and fire survival.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.