Structural element for an optical cable - comprising single glass filament embedded in polyethylene terephthalate strand with diameter 5 times that of the filament

摘要

Structural element for optical cable comprises a single glass filament embedded at the centre of a plastics strand whose outer dia. is =5 times that of the filament dia. The element is free of metal components, and protected against kinking under the action of thermal stress. The plastics coating is pref. of polyethylene terephthalate. The dia. of the glass filament is pref. 150-200 mu.