To prevent an UV curable resin from mixing with foams and lifting, which makes a coating process impossible when several wires are twisted around the central anti-tensile wire and coated with an UV curable resin by a pressing coater of UV resins.
In the method of manufacturing optical fiber units, several optical fiber core wires 22 are twisted around the central anti-tensile wire 20, sent to a core wire gathering part 26, coated with an integration material of UV ray curable resins 30 by a pressing coater of UV resins, sent to an UV-ray irradiation apparatus 32 and irradiated with an UV ray and the integration material is cured. The sending temperature of core wires 22, which are sent to the pressing coater of UV resins, is 0-10°C higher than the temperature of the UV ray curable resin in the coating process.
SHIMOMICHI TAKESHI
OHASHI KEIJI
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