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Title:
OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2020/096055
Kind Code:
A1
Abstract:
This optical fiber is provided with: a glass fiber which comprises a core and a cladding; and a coating resin layer that covers the glass fiber. The coating resin layer comprises: a primary resin layer that is in contact with the glass fiber and covers the glass fiber; and a secondary resin layer that covers the outer periphery of the primary resin layer. The Young's modulus of the primary resin layer at 23°C is 0.4 MPa or less; the outer diameter of the primary resin layer is from 185 μm to 202 μm (inclusive); the glass transition temperature of the secondary resin layer is from 60°C to 95°C (inclusive); and the difference between the average linear expansion coefficient of the coating resin layer of the range from 60°C to 140°C and the average linear expansion coefficient of the coating resin layer of the range from -60°C to 0°C is 0.7 × 10-4/°C or less.

Inventors:
SHIMADA KENSAKU (JP)
SOHMA KAZUYUKI (JP)
KONISHI TATSUYA (JP)
Application Number:
PCT/JP2019/043992
Publication Date:
May 14, 2020
Filing Date:
November 08, 2019
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
C08F290/06; C03C25/1065; C03C25/28; G02B6/44
Foreign References:
JP2016040216A2016-03-24
JP2001240433A2001-09-04
JP2000241680A2000-09-08
JP2012113091A2012-06-14
JP2000221370A2000-08-11
JPS6012522A1985-01-22
JPH063299A1994-01-11
JP2018211163A2018-11-09
JP2009198945A2009-09-03
JP2016040216A2016-03-24
JP2001328851A2001-11-27
Other References:
See also references of EP 3878880A4
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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