Method for manufacturing optical fiber with oxygen-strengthened UV-resin coating

Patent metadata

Field	Value
Publication number	US-11428866-B2
Application number	US-201916583425-A
Country	US
Kind code	B2
Filing date	Sep 26, 2019
Priority date	Sep 27, 2018
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A method for manufacturing an optical fiber is a method for manufacturing an optical fiber including a glass fiber, and a coating resin layer that coats the glass fiber by being in contact with the glass fiber. The method includes a step of increasing a dissolved oxygen concentration in an ultraviolet ray curable resin composition, a step of applying the ultraviolet ray curable resin composition, in which the dissolved oxygen concentration is increased, onto the glass fiber, and a step of curing the ultraviolet ray curable resin composition by irradiating the ultraviolet ray curable resin composition that is applied onto the glass fiber with an ultraviolet ray.

First claim

What is claimed is:

1. A method for manufacturing an optical fiber including a glass fiber, and a coating resin layer that coats the glass fiber by being in contact with the glass fiber, the method comprising:
a step of increasing a dissolved oxygen concentration in an ultraviolet ray curable resin composition;
a step of applying the ultraviolet ray curable resin composition, in which the dissolved oxygen concentration is increased, onto the glass fiber; and
a step of curing the ultraviolet ray curable resin composition by irradiating the ultraviolet ray curable resin composition that is applied onto the glass fiber with an ultraviolet ray.

2. The method for manufacturing an optical fiber according to claim 1 ,
wherein in the step of increasing the dissolved oxygen concentration, the dissolved oxygen concentration is increased to be greater than or equal to 1.1 times.

3. The method for manufacturing an optical fiber according to claim 1 ,
wherein in the step of increasing the dissolved oxygen concentration, the dissolved oxygen concentration is increased to be greater than or equal to 1.1 times and less than or equal to 8.5 times.

Assignees

• Sumitomo Electric Industries

Inventors

• Iwaguchi Noriaki
• OKUYAMA Haruki
• Fujii Takashi

Classifications

• C03C25/12

  General methods of coating; Devices therefor · CPC title

• G02B6/02395 Primary

  Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture (G02B6/02052, G02B6/02057, G02B6/024, G02B6/032, G02B6/105, G02B6/14 take precedence; coating on fibre gratings G02B6/02104; multilayer core or cladding G02B6/036; reinforcing splice joints G02B6/2558; optical cables, i.e. comprising protective structures external to the protective coating such as a jacket or plural coated optical fibres G02B6/44; coating of glass to obtain optical fibres C03C25/104) · CPC title

• C03C25/32

  obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds · CPC title

• C03C25/326

  Polyureas; Polyurethanes · CPC title

• C03B37/023 Primary

  Fibres composed of different sorts of glass, {e.g. glass optical fibres, made by the double crucible technique} · CPC title