Optical fiber cable and sensor

Patent metadata

Field	Value
Publication number	US-9817200-B2
Application number	US-201515111577-A
Country	US
Kind code	B2
Filing date	Jan 13, 2015
Priority date	Jan 17, 2014
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

Provided is an optical fiber cable having excellent flame retardancy, long-term heat resistance and mechanical characteristics. An optical fiber cable according to the present invention comprises an optical fiber and a cladding layer that is provided on the outer circumference of the optical fiber. The cladding layer contains a chlorinated polyolefin resin (A) and a polyolefin resin (B).

First claim

What is claimed is:

1. An optical fiber cable, comprising:
an optical fiber; and
a jacket layer formed on the periphery of the optical fiber,
wherein
the jacket layer comprises a chlorinated polyolefin resin (A), a polyolefin resin (B), and a melt tension improver (J); and
the optical fiber cable has an increase in transmission loss of less than 1dB after repeated bendings numbering 36,000 to 52,000 when measured by a repeated bending test in accordance with IEC 60794-1:1993.

2. The optical fiber cable according to claim 1 , wherein the optical fiber cable has a flexural modulus of 3-10 N when measured by conducting a three-point bending test in accordance with ISO 178.

3. The optical fiber cable according to claim 1 , wherein the melt tension improver (J) is at least either an acrylic resin or a fluororesin.

4. The optical fiber cable according to claim 1 , wherein the chlorinated polyolefin resin (A) is a chlorinated polyethylene.

5. The optical fiber cable according to claim 1 , wherein the polyolefin resin (B) is polyethylene.

6. The optical fiber cable according to claim 1 , wherein the jacket layer further comprises a flame retardant (C).

7. The optical fiber cable according to claim 6 , wherein the jacket layer further comprises a flame retardant promoter (D).

8. A sensor, comprising the optical fiber cable according to claim 1 .

9. The optical fiber cable according to claim 3 , wherein the acrylic resin has a number-average molecular weight of 300,000 to 8,000,000.

10. The optical fiber cable according to claim 3 , wherein the acrylic resin has a number-average molecular weight of 500,000 to 6,000,000.

11. The optical fiber cable according to claim 3 , wherein the fluororesin has a number-average molecular weight of 1,000,000 to 30,000,000.

12. The optical fiber cable according to claim 3 , wherein the fluororesin has a number-average molecular weight of 3,000,000 to 20,000,000.

13. The optical fiber cable according to claim 1 , wherein the melt tension improver (J) is present in an amount of 0.5-20 mass % of the jacket layer.

14. The optical fiber cable according to claim 1 , wherein the melt tension improver (J) is present in an amount of 1-15 mass % of the jacket layer.

15. The optical fiber cable according to claim 1 , wherein the chlorinated polyolefin resin (A) is present in an amount of 15-50 mass % of the jacket layer.

16. The optical fiber cable according to claim 1 , wherein the chlorinated polyolefin resin (A) is present in an amount of 20-45 mass % of the jacket layer.

Assignees

• Mitsubishi Rayon Co
• Mitsubishi Chem Corp

Inventors

• Kimura Tsuyoshi
• Tsukamoto Yoshihiro
• Asano Kouji

Classifications

• C03C25/1065

  Multiple coatings · CPC title

• C03C25/30

  Polyolefins · CPC title

• G02B6/02033

  Core or cladding made from organic material, e.g. polymeric material (G02B1/04 takes precedence) · CPC title

• C03C25/106

  Single coatings · CPC title

• G02B6/443 Primary

  Protective covering · CPC title