Patent ID: 11947161
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 6:
7. 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 coating the glass fiber; and
a secondary resin layer coating the primary resin layer,
wherein the secondary resin layer comprises inorganic oxide particles, the inorganic oxide particles are lump-shaped aggregated particles, and a volume average particle size of the inorganic oxide particles measured by a X-ray small angle scattering method is 5 nm or more and 800 nm or less,
wherein the inorganic oxide particles are subjected to hydrophobic treatment, and
wherein a content of the inorganic oxide particles is 5% by mass or more and 60% by mass or less.