cable making machine with preheater cable production line

What are the categories of the outer materials of the USB data cable?

(1) PVC except: PVC proportion is about 1.4. The appearance is white powder. Water resistance, acid and alkali resistance, combustion resistance and electrical insulation are very good. It is adopted as a cable insulation and covered material. However, PVC is a polar material, and the characteristics of the dielectric are poor. Sofele, 120-150 ℃ has a complete plasticity above 190 ° C, it is fiercely decomposed. Release gas hydrochloric acid, so the most appropriate temperature range of processing is about 150-180 ° C.

(2) PE external quilt: divided into HDPE, LDPE (commonly used) and FPE (foam PE). With the increase of density, the softening temperature increases, the resistance of tension increases, the elongation rate decreases, the softness gradually loses, the strong toughness increases, and the impact strength gradually. PE due to the characteristics of low dielectric constant and high insulation impedance characteristics of high insulation impedance characteristics Therefore, its electrical properties are very superior and are often used in coaxial cables or high -frequency materials. The disadvantages are: flammable, and the maximum operating temperature is 80 ° C.

(3) PU external quilt: the eulsion of extremely excellent tensile strength, and it is also the best material for strong toughness and abrasion resistance in the current insulated material, and the best corrosion resistance.

(4) PP: High shrinkage, injection molding is easy to shrink, good electrical characteristics, water resistance, abrasion resistance, and chemical resistance, mainly used for insulation materials for telephone and communication cables.