Optical fiber bundling material and bundled optical fibers

摘要

A curable resin composition adapted for bundling coated optical fibers comprises: (A) polyetherpolyurethanes of at least one kind having an ethylenically unsaturated group and containing from 40% to 85%, by weight, of a tetramethyleneoxy structure in the entire structure thereof; (B) ethylenically unsaturated monomer; and (C) a photopolymerization initiator. This resin composition, when cured, has a coefficient of dynamic friction with polyethylene of not more than 0.4, and is thus specially adapted for use in holding together coated optical fibers in a tape-like structure.