Optical fiber cable

Patent metadata

Field	Value
Publication number	US-9261664-B2
Application number	US-201414453088-A
Country	US
Kind code	B2
Filing date	Aug 6, 2014
Priority date	Feb 16, 2012
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

There is provided an optical fiber cable having a configuration in which a strand core of optical fibers is housed in a sheath and capable of fulfilling sufficient mechanical characteristics and ensuring a predetermined watertight property. The optical fiber cable includes a strand core 1 including a plurality of optical fiber strands 11 and watertight material strings 12 , a tape body 2 covering the strand core 1 , and a cylindrical sheath 5 covering the strand core 1 and the tape body 2 , wherein the tape body 2 has water permeability, and the watertight material strings 12 are dissolved in water when the water permeates through the tape body 2 , and the dissolved watertight material passes through the tape body 2 and flows into the sheath 5.

First claim

What is claimed is:

1. An optical fiber cable comprising:
a strand core including a plurality of optical fiber strands and watertight material strings;
a tape body extending in a cable longitudinal direction and covering the strand core; and
a cylindrical sheath covering the strand core and the tape body,
wherein the tape body has water permeability, and
the watertight material strings are configured to dissolve in water if the water permeates through the tape body, so that a dissolved watertight material passes through the tape body and flows into the sheath.

2. The optical fiber cable according to claim 1 , wherein the water permeability of the tape body is ensured due to a plurality of openings formed on the tape body.

3. The optical fiber cable according to claim 1 , wherein the water permeability of the tape body is ensured due to a porous material composing the tape body.

4. The optical fiber cable according to claim 1 , wherein the water permeability of the tape body is ensured in a manner such that a circumference of the strand core is not entirely covered with the tape body, but part of the circumference of the strand core is exposed to an outside.

Assignees

• Fujikura Ltd

Inventors

• Tomikawa Kouji
• Okada Naoki
• Takeda Daiki
• Yamanaka Masayoshi

Classifications

• G02B6/44384 Primary

  the means comprising water blocking or hydrophobic materials (G02B6/4439, G02B6/4479 take precedence) · CPC title

• H01B7/288

  using hygroscopic material or material swelling in the presence of liquid · CPC title

• G02B6/4494

  Physics · mapped topic

• G02B6/443 Primary

  Protective covering · CPC title