Patent ID: 6447700
Filing Date: 2002-09-10
Classification: C08L,G02B

Abstract:
A process for producing an optical fiber loose tube which comprises (Aâ€²) 100 parts by weight of polybutylene terephthalate having a terminal carboxyl group concentration of 15 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, which process comprising the step of extrusion molding at a haul-off speed of 200 m/min or more a resin composition for optical fiber loose tubes, said resin composition comprising (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.