PRODUCTION OF SLOT FOR OPTICAL CABLE

PURPOSE: To provide a process for production capable of sufficiently assuring the shape and dimensional accuracy of optical fiber housing grooves. CONSTITUTION: This process for production of slots for optical cables comprises arranging a high-tensile wire 2 made of a fiber reinforced synthetic resin at a center, providing the outer periphery of this high-tensile wire 2 with a precoating layer 3 consisting of a thermoplastic resin and extrusion molding a slot body part 4 having grooves 5 extending in a longitudinal direction by a crystalline thermoplastic resin on the outer periphery of this precoating layer. 3. The precoating layer 3 is shaped in its outside diameter before the body part 4 is formed. A straight chain low-density polyethylene or a mixture composed of this straight chain low-density polyethylene and a high-density polyethylene is used as the raw material resin forming the precoating layer 3. The density of the raw material resin is set within a range of >=0.925 to