Patent ID: 11914186
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 0:
1. An optical fiber comprising a glass fiber comprising a core and a cladding; a primary resin layer being in contact with the glass fiber and covering the glass fiber; and a secondary resin layer covering the primary resin layer,
wherein a Young's modulus of the primary resin layer is 0.04 MPa or more and 1.0 MPa or less at 23° C.±2° C., and
wherein the secondary resin layer consists of a cured product of a resin composition comprising a base resin containing a urethane (meth)acrylate oligomer, a monomer, and a photopolymerization initiator; and hydrophobic inorganic oxide particles, and a content of the inorganic oxide particles is 8% by mass or more and 60% by mass or less based on a total amount of the resin composition.