PVC used in the cable industry, is a mixture of polyvinyl chloride resin (PVC), obtained by polymerization of vinyl chloride (CH2 = CHCl) with plasticizers, stabilizers, fillers and other ingredients. Polyvinyl chloride (PVC) – a high-molecular compound linear structure of the form fine powder. The molecular weight of PVC 50000 – 200000. The absence of double bonds and the presence of chlorine atoms makes PVC resistant to acids and alkalis, as well as ozone-resistant and non-combustible material. In cable PVC compositions plasticized PVC using the suspension polymerization, in which the polymer is obtained malorazvetvlennym with a narrow molecular weight distribution. To use the cable flexible PVC of molecular weight 60000-100000.

When added to polyvinyl chloride resin, plasticizers, stabilizers and other components increased its physical, mechanical and technological properties, but reduces the dielectric properties of PVC plastic. PVC used in the cable industry, with properties and inferior quality can be divided into three main groups: isolation of high electrical performance in a range of operating temperatures; hose to protect the basic building elements of the cable from the external environment, semiconducting, holding in its electrical characteristics intermediate between an insulator and a conductor. Physical and mechanical properties of PVC-PVC in mainly determined by the percentage of plasticizer in the formulation. Elongation of PVC plastic rupture depends on the content of plasticizer. The maximum elongation is obtained by content of 45-70 wt. Part of plasticizer. The number and composition of plasticizer also significantly affect the specific volume electrical resistance of PVC plastic .