Manufacturing method of optical fiber ribbon, and optical fiber ribbon manufactured by the manufacturing method
It is an object of the present invention to suppress a coating resin from being shaved off in an event where optical fibers are sent out from a coating dice. When a Young's modulus of ultraviolet curable resins 13 located on outermost layers of optical fibers 3 is 300 MPa or more, and the Young's modulus is 300 MPa to 600 MPa, a plurality of the optical fibers 3 in which friction force measured by the following measurement method is 0.3 N or less are arranged in parallel to one another, these respective optical fibers 3 are fixed to one another intermittently along a longitudinal direction thereof, and adhered portions 5 are formed.
1. A manufacturing method of an optical fiber ribbon, in which a plurality of optical fibers are arranged in parallel to one another, wherein each of the plurality of optical fibers is coated with a coating resin, and the plurality of optical fibers are fixed to one another intermittently along a longitudinal direction thereof, the manufacturing method comprising:
coating the plurality of optical fibers, each of which is coated with the coating resin, with an uncured ultraviolet resin intermittently along the longitudinal direction at a time of sending the plurality of optical fibers out from a coating dice; and
connecting the plurality of optical fibers to one another intermittently along the longitudinal direction by curing the uncured ultraviolet resin to form adhered portions,
wherein a Young's modulus of the coating resin is 300 MPa or more.
2. The manufacturing method of an optical fiber ribbon according to claim 1 , wherein, when the Young's modulus of the coating resin is 300 MPa or more to less than 600 MPa, a friction force of the coating resin of each of the plurality of optical fibers is 0.3 N or less.
3. An optical fiber ribbon manufactured by the manufacturing method according to claim 1 .