Optical fiber

Patent metadata

Field	Value
Publication number	US-9229159-B2
Application number	US-201313861649-A
Country	US
Kind code	B2
Filing date	Apr 12, 2013
Priority date	Apr 13, 2012
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

An optical fiber 1 comprising a core layer 2 composed of a silica based glass, a clad layer 3 formed on the outer circumference of the core layer 2 by curing a curable resin composition, and an ink layer 4 formed around the clad layer 3 , wherein adhesive force between the core layer 2 and the clad layer 3 being from 1.5 g/mm to 4.0 g/mm.

First claim

What is claimed is:

1. An optical fiber comprising a core layer composed of a silica based glass, a clad layer formed on the outer circumference of the core layer by curing a curable resin composition, and an ink layer formed so as to come into contact with the outer circumference of the clad layer,
wherein adhesive force between the core layer and the clad layer is from 1.5 g/mm to 4.0 g/mm,
wherein the ink layer is formed of a composition containing a coloring pigment and an ultraviolet curable urethane (meth)acrylate compound,
wherein the curable resin composition for forming the clad layer contains at least one compound selected from a fluorine atom-containing urethane (meth)acrylate, a (meth)acrylate compound having a fluorinated polyether in the structure, and a (meth)acrylated fluorine atom-containing vinyl polymer,
wherein fluorine content in the clad layer is from 20 to 60 wt %,
wherein the curable resin composition further contains an alkoxysilane represented by the following general formula in an amount of 0.2 to 1 wt %,
Z—R—Si(X) 3   General formula:

wherein Z represents a (meth)acryl group, a mercapto group, or an epoxy group, X represents —OCH 3 or —OC 2 H 5 , and R represents C n H 2n , where n equals 2, 3, 4, or 5,
wherein the ink layer is formed as an outermost layer, and
wherein adhesive force between the clad layer and the ink layer is from 0.1 to 0.4 g/mm.

2. The optical fiber according to claim 1 , wherein a thickness of the ink layer is from 3 μm to 8 μm.

Assignees

• Sumitomo Electric Industries

Inventors

• Sohma Kazuyuki
• Homma Yuya
• Sakabe Itaru

Classifications

• 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

• C03C25/106

  Single coatings · CPC title

• C08L27/12

  containing fluorine atoms · CPC title

• G02B1/048

  characterised by the cladding material · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title