Telecommunications cable having good adhesion between a protective jacket and strength members
US6198865A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Aug 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4433
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A telecommunications cable comprising a communications element, such as an optical fiber, and a jacket surrounding the communications element having at least one elongated strength member embedded therein is disclosed. The jacket of the telecommunications cable is formed by extruding a blend of a polyolefin material and a copolymer adhesion promoting material, such as graft copolymer of polyethylene and ethylene acrylic acid or a graft copolymer of polyethylene and maleic anhydride. The copolymer adhesion promoting material promotes adhesion between the strength member and the jacket. The resulting increase in adhesion between the strength member and the jacket improves the cable's resistance to water penetration, low temperature buckling and shrinkage as well as excessive high temperature expansion. The blending of an adhesion promoting material in the jacketing material also reduces the risk of armor cracking during cyclic flexing and strength member pistoning within the jacket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.