Patent ID: 6898356

Claim:
A separable optical fiber ribbon wherein a plurality of colored optical fibers arranged in parallel are coated with a collective coating resin so as to be integrated into an optical fiber ribbon, and a plurality of said optical fiber ribbons are arranged in parallel and coated with a binding resin; and wherein said binding resin is obtained by curing a UV-curable resin composition satisfying the condition represented by the following expression (1): 1.0×10 −4 ≦( W·N /100M W )≦4.0×10 −4 (1) where W is the compounding ratio [wt %] of a urethane acrylate compound contained in the resin composition, N is the number of urethane groups in one molecule of said urethane acrylate compound, and M W is the average molecular weight of said urethane acrylate compound.