The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2026
Filed:
Feb. 20, 2024
Sumitomo Electric Industries, Ltd., Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A method for manufacturing an optical fiber including a glass fiber and a primary resin layer, the method includes: applying an ultraviolet curable resin composition; and forming the primary resin layer by curing the resin composition by ultraviolet irradiation reactor(s), wherein a number N of the ultraviolet irradiation reactor(s), a ratio of normalized output φ for each of the ultraviolet irradiation reactor(s), and an irradiation time t (sec) of each of the ultraviolet irradiation reactor(s) in the forming of the primary resin layer satisfy 6.00×10≤N*φ*t≤2.88×10, wherein a concentration C [mass %] of the photoinitiator in the forming of the primary resin layer is in accordance with formula (1): wherein the initiation reaction rate constant k is from 20 to 100, wherein the dark reaction rate constant kD is 0≤kD≤30, and wherein the reverse reaction rate constant kR is 0≤kR≤10.
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