Resin composition, secondary coating material for optical fiber, optical fiber, and method for manufacturing optical fiber

The resin composition for optical fibers, incorporating urethane (meth)acrylate, a photopolymerization initiator, and carbon nanotubes, addresses the issue of fiber charging and breakage by achieving a low surface resistivity, thus reducing costs associated with multiple electrostatic remover installations.

JP7647753B2Active Publication Date: 2025-03-18SUMITOMO ELECTRIC INDUSTRIES LTD
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Patent Information

Application Number
JP2022534929
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-07-09
Filing Date
2021-05-18
Publication Date
2025-03-18
Estimated Expiration
2041-05-18

AI Technical Summary

Technical Problem

The challenge is to reduce the disconnection of optical fibers due to foreign matter adhesion and electrostatic charging, which requires multiple installations of electrostatic removers, increasing costs.

Method used

A resin composition for optical fibers is developed, comprising a photopolymerizable compound with urethane (meth)acrylate, a photopolymerization initiator, and an antistatic material, specifically carbon nanotubes, to achieve a surface resistivity of 10^10 Ω or less, suppressing fiber charging and breakage.

Benefits of technology

The resin composition effectively suppresses optical fiber charging and reduces breakage due to foreign matter adhesion, thereby reducing the need for multiple electrostatic remover installations and lowering costs.

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Abstract

The present disclosure relates to a resin composition used for coating an optical fiber. The resin composition comprises: a photopolymerizable compound containing urethane (meth)acrylate; a photopolymerization initiator; and an anti-static material. The surface resistivity ρs of a cured product from the resin composition is 1015Ω or lower.
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