Mechanically protected and thermally insulated optical fibre cable - comprises high-tensile core, corded fibres with silicone lubricant, polyimide coating and triple plastics tape windings (NL 16.3.79)

摘要

Fibre bundle for optical communication transmission comprises at least 2 corded optical fibres each with a primary protective coating and a protective sheathing over that. Each optical fibre is surrounded by a 2nd, loosely fitting, tubular, protective layer and corded about a high-tensile central core. The tubular protective layer has a smooth surface. Between it and the optical fibre there is a lubricant, pref. a silicon oil. The primary protective coating consists of a polyimide, silicone or epoxy resin. The tubular protective layer is pref. PVdF. The corded fibres are wound about by a thermally protective 3-ply winding of polyterephthalate/polyethylene/polyterephthalate film.