Patent ID: 6795625
Filing Date: 2004-09-21
Classification: G02B

Abstract:
A polyethylene spacer for optical fiber cable including a central tensile member, an intermediate coating layer arranged on an outer periphery of the central tensile member and being compatible with polyethylene and a main coating arranged on an outer periphery of the intermediate coating layer and having continuous spiral grooves for accommodating optical fibers and which are inverted periodically in a lengthwise direction, the main coating being formed from polyethylene resin,said spacer for optical fiber cable including a plurality of ribs defining said spiral grooves, a minimum rib thickness of said ribs being 1.0 mm or less and a groove inclination angle of a cross-section of said spacer inversion parts being 18Â° or less, a resin density of a root part of each of said ribs being the lowest in comparison to a resin density at a tip part of said rib and central parts of said rib between said root part of said rib and said tip part of said rib.