The polyester yarn should be polyester yarn, which is a synthetic fiber, known as polyethylene terephthalate, whose properties are hardly hygroscopic.

Aramid yarn is a high modulus aramid yarn suitable for ADSS fiber optic cable, non-metal optical cable and indoor optical cable. Aramid yarn has special density, low tensile modulus, high breaking strength and low elongation at break. Performance; at high temperatures, it maintains inherent stability, very low shrinkage, low creep and very high glass transition temperature, in addition to high corrosion resistance, non-conducting, in addition to strong acid and In addition to strong alkali, it has strong chemical resistance and is a superior cable reinforcement unit material.