The electric cable industry is exposed to severe pressure to increase its operating efficiency because of increasing requirements on the quality of its products while the market prices of the products decrease. Since the 1970's plastics have helped to increase productivity. Plastics-oriented research is concerned equally with processes (extrusion and cross-linking) as with plastic blends. Each
... [Show full abstract] must be optimally coordinated with the other if quality improvements and higher productivity are to be achieved.