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Title:
OPTICAL FIBER AND PRODUCTION METHOD FOR OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2022/050257
Kind Code:
A1
Abstract:
An optical fiber comprising: a glass fiber including a core and a cladding; and a covering resin layer that is in contact with the glass fiber and covers the glass fiber, wherein the covering resin layer has a primary resin layer that is in contact with the glass fiber and covers the glass fiber, and a secondary layer that covers the primary resin layer, the primary resin layer contains a cured product of a first resin composition containing a photopolymerizable compound and a phosphine oxide-based photopolymerization initiator, the secondary resin layer contains a cured product of a second resin composition containing a photopolymerizable compound and a phosphine oxide-based photopolymerization initiator, and the amount of the unreacted phosphine oxide-based photopolymerization initiator in the covering resin layer is at most 0.5 mass%.

Inventors:
NOMURA TAKAHIRO (JP)
SOHMA KAZUYUKI (JP)
Application Number:
PCT/JP2021/031878
Publication Date:
March 10, 2022
Filing Date:
August 31, 2021
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
C08F20/30; C08F2/50; G02B6/44
Domestic Patent References:
WO2014168201A12014-10-16
WO2019138968A12019-07-18
WO2016059727A12016-04-21
Foreign References:
JP2018077303A2018-05-17
JP2014118318A2014-06-30
JPH1059748A1998-03-03
JP2006308780A2006-11-09
JP2018177630A2018-11-15
JP2016070966A2016-05-09
JP2007256609A2007-10-04
US20190338161A12019-11-07
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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