Resin composition for optical fiber loose tubes, optical fiber loose tube and production process thereof

摘要

A resin composition for optical fiber loose tubes contains (A) 100 parts by weight of polybutylene terephthalate having a terminal carboxyl group concentration of 10 eq/ton or less and an intrinsic viscosity of 1.0 to 1.2, and (B) 0.005 to 0.1 part by weight of polyethylene wax. The optical fiber loose tube is produced by extrusion molding at a haul-off speed of 200 m/min or more a resin composition for optical fiber loose tubes. The resin composition containing (A) 100 parts by weight of polybutylene terephthalate having a terminal carboxyl group concentration of 10 eq/ton or less and an intrinsic viscosity of 1.0 to 1.2, and (B) 0.005 to 0.1 part by weight of polyethylene wax.