Optical fiber cable having a water absorptive member
AssigneesTokai Rubber Industries, Ltd., Sumitomo Electric Industries, Ltd., Nippon Telgraph and Telephone Corporation, Telephone Corporation
InventorsMasanari Umeda, Yukio Sakuraba, Fumihiro Ashiya, Toshinobu Matsuo
Life of this patent
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Abstract
A water absorptive composition comprising a thermoplastic elastomer as a first component, a second component and a third component selected from the group which consists of: a water-soluble resin; a hydrophilic compound selected from the group consisting of metal salt of carboxylic acid, polyhydric alcohol, amino alcohol, linear polyether, saccharide, and sugar alcohol; and a surface treating agent selected from the group consisting of sorbitan fatty acid ester, glycidyl ether of polyhydric alcohol, and silane coupling agent. The composition is suitably used for producing a water absorptive member for protecting optical fiber elements of an optical fiber cable.
Claims33
An optical fiber cable comprising:
- an elongated grooved member which has at least one groove formed in an outer surface thereof so as to extend in a longitudinal direction thereof;
- at least one optical fiber element accommodated in each of said at least one groove;
- a water absorptive member covering said outer surface of said grooved member, said water adsorptive member including at least a water absorptive composition which comprises a thermoplastic elastomer as a first component, a water-absorptive resin as a second component, and a water-soluble resin as a third component, said water absorptive composition comprising 100 parts by weight of said first component, 10-3000 parts by weight of said second component, and 5-100 parts by weight of said third component;
- a cable jacket formed on said water absorptive member and providing an outer surface of the cable.
An optical fiber cable comprising:
- an elongated grooved member which has at least one groove formed in an outer surface thereof so as to extend in a longitudinal direction thereof;
- at least one optical fiber element accommodated in each of said at least one groove;
- a water absorptive member covering said outer surface of said grooved member, said water absorptive member including at least a water absorptive composition which comprises a thermoplastic elastomer as a first component, a water-absorptive resin as a second component, and a third component which consists of a hydrophilic compound selected from the group consisting of metal salt of carboxylic acid, polyhydric alcohol, amino alcohol, linear polyether, saccharide, and sugar alcohol, said water absorptive composition comprising 100 parts by weight of said first component, 10-3000 parts by weight of said second component, and 1-50 parts by weight of said hydrophilic compound as said third component;
- and
- a cable jacket formed on said water absorptive member and providing an outer surface of the cable;.
An optical fiber cable comprising:
- an elongated grooved member which has at least one groove formed in an outer surface thereof so as to extend in a longitudinal direction thereof;
- at least one optical fiber element accommodated in each of said at least one groove;
- a water absorptive member covering said outer surface of said grooved member, said water absorptive member including at least a water absorptive composition which comprises a thermoplastic elastomer as a first component, a water-absorptive resin as a second component, and a third component which consists of a surface treating agent selected from the group consisting of sorbitan fatty acid ester, glycidyl ether of polyhydric alcohol, and silane coupling agent, said water absorptive composition comprising 100 parts by weight of said first component, 10-3000 parts by weight of said second component, and 0.1-20 parts by weight of said surface treating agent as said third component;
- and
- a cable jacket formed on said water absorptive member and providing an outer surface of the cable.
Dependencies are inferred from the claim text.