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Shinichi Sasaki

Kiyoshi Sugie

Masamori Ohno

Hiroyasu Oki

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.

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

An apparatus for measuring the percentage of moisture content and weight of a sheet-like object has a pair of metal boxy sections for providing a cavity resonator with openings, defining a gap interposed therebetween. In measurement, the sheet-like object is inserted in the gap. The percentage of moisture content of the sheet-like object is measured by detecting the variable resonant voltage of a microwave signal introduced into the cavity resonator. Weighing of the sheet-like object is measured detecting the variable resonant frequency of the microwave signal introduced.

Growing community of inventors

Hitachi, Japan

Shinichi Sasaki