At present, there are a lot of polyolefin internationally, manufacturers to develop and produce the crosslinked PE cable used special semiconduction shielding material. Such as the United States UCC company, main brands including HFDA - 0590, 0585, HF HFDA a. DA - 08804; 13 also XingChan company, the main brands are UBECV315, VBECV319; BP company. The main brand for HFDM0595 (black), H315ES (black), H310ES (black).

1.2 PVC cable materials

In wire and cable insulation and sheath material, PVC is cheaper, good mechanical properties, easy processing, makes it a long time by the largest number of wire and cable industry material. Since entering the end of the 20th century, environmental problems are widely known, PVC material in some developed countries have proposed restrictions or comprehensive legislation to ban the use of PVC cable advice. Data show that the dosage of the western European countries in the field of PVC cable, in 1994 to 44 LKT, accounting for 58% of the cable used in the polymer, and in 2000, PVC cable industry in Western Europe, the total amount is 398 kt. Accounting for 48% of the cable used in the polymer, amount and proportion are falling. In recent years, control, and to ban the use of PVC material has formed a strong trend.

Although no plastic to replace PVC material is higher and higher, but also can't replace PVC itself has the short term advantages (such as low cost, good flame retardancy, processing equipment, the craft is simple, wide adjustable hardness, good electrical insulation, oil resistant, resistant to chemical reagent, etc.), so the short-term internal worldwide a total ban on the use of PVC is not reality.

1.3 PP cable materials

PP because of its mechanical properties, electrical properties, wear resistance, resistance to chemical reagent, especially oil of the superior performance, a large amount of overhead lines used in power cable and electric equipment cables. Foreign PP used for wire and cable insulation started in the '60 s, 90 s dosage of PP in the United States has more than 10 kt, in PP occupied more important in the total amount. BP, 13 also XingChan, Germany, bayer and other companies have PP cable material grades, but most especially in the development of PP wire and cable brands, and ProfaxSE191 as the best. Due to require good low temperature resistance and softness, so foreign cables with PP for ethylene propylene block copolymer.