Abstract An optical cable structure for use in high-voltage environments comprised of a metal-free cable core having optical elements therein and a multi-layer sheath encasing the cable core with all the hollow spaces within the cable core and in the sheath being filled with a softened or plasticized cross-linked synthetic material selected from the group consisting of a polyurethane resin, an epoxy resin and a polyester resin and at least the outer layer of the multi-layer sheath is composed of a creep-resistant material based on a compound selected from the group consisting of a polyolefin, such as a polyethylene or polypropylene, a polyurethane, a polyester or a polyester-elastomer. Such an optical communication cable structure is stabile in high-voltage environments and can be laid as desired adjacent structures carrying high voltage and can, for example, be suspended at overhead voltage lines.
An optical cable structure for use in high-voltage environments, comprising: a metal-free cable core containing optical transmission elements; a multi-layer sheath encasing said cable core and having an exterior layer; a plasticized cross-linked synthetic material selected from the group consisting of a polyurethane resin, an epoxy resin and a polyester resin in all hollow spaces within said cable core and within said sheath; and at least said exterior layer of said multi-layer sheath being composed of a creep-resistant material based on a compound selected from the group consisting of a polyolefin and a polyester material.
Claim 2
Dependent Claim
95 words
An optical cable structure for use in high-voltage environments, comprising: a metal-free cable core containing optical transmission elements; a multi-layer sheath encasing said cable core and having an exterior layer; a plasticized cross-linked synthetic material selected from the group consisting of a polyurethane resin, an epoxy resin and a polyester resin in all hollow spaces within said cable core and within said sheath; and at least said exterior layer of said multi-layer sheath being composed of a creep-resistant material based on a compound selected from the group consisting of a polyolefin and a polyester material.
Claim 3
Dependent Claim
22 words
An optical cable structure as defined in claim 1 wherein said polyolefin is selected from the group consisting of polyethylene and polypropylene.
Claim 4
Dependent Claim
15 words
An optical cable structure as defined in claim 1 wherein said polyester is a polyester-elastomer.
Claim 5
Dependent Claim
39 words
An optical cable structure as defined in claim 1 wherein said plasticized cross-linked synthetic material filling the hollow spaces within the cable core and within the sheath is plasticized with a plasticizer for polyvinyl chloride having high electrical values.
Claim 6
Dependent Claim
17 words
An optical communication cable structure as defined in claim 4 wherein said softener is a dibenzyl toluol.
Claim 7
Dependent Claim
33 words
An optical communication cable structure as defined in claim 1 wherein the plasticize cross-linked synthetic material filling the hollow spaces within the cable core and within the multi-layer sheath contains an adhesive component.
Claim 8
Dependent Claim
17 words
An optical communication cable structure as defined in claim 6 wherein said adhesive component is a polyisobutylene.
Claim 9
Dependent Claim
18 words
An optical communication cable structure as defined in claim 1 wherein said metal-free cable core contains tension-relieving elements.