What Is a Cable Sheath?

The cable jacket is the outermost layer of the cable. For example, VV is a PVC insulation and a PVC jacket. The tube worn outside is called the protection tube.

Cable sheath

Right!

The cable jacket is the outermost layer of the cable. For example, VV is a PVC insulation and a PVC jacket. The tube worn outside is called the protection tube.

High-density polyethylene. Compared with MDPE (medium density polyethylene) and LD / LLD (low density / linear low density), the molecular chain structure of HDPE material is regular, the molecular chain has fewer branch structures, and the branch chains are shorter, and the molecular chains are arranged neatly The distance between the molecular chains is small, and the force between the molecular chains is large. These short-range structural characteristics of HDPE determine its basic properties: high material density, good crystallinity, large crystallinity, and large interlayer molecular forces. The macro performance is that the material density is high, mechanical properties such as tensile strength are better than LLD / LD / MD, the material has high hardness, excellent wear resistance, and good chemical resistance. However, because of its melt fluidity and material flexibility, the processing of materials has higher requirements.

The black high-density polyethylene material used as the sheath material is selected from the high-density polyethylene base resin special for the sheath material, added with high-quality carbon black masterbatch and other related processing aids, and mixed and granulated. High-quality carbon black masterbatch content, carbon black granularity, dispersion and other factors have a great impact on the long-term performance of the optical cable such as resistance to ultraviolet radiation and heat aging.

BJCCS uses special HDPE sheath materials for cables. Its choice of basic resin, carbon black content, carbon black particle size and dispersion, etc., all have a high degree of stability and reliability. It can ensure the physical and mechanical properties of optical cables and adapt to the laying conditions. Environmental aging, guaranteeing reliability and long service life, with its unique advantages