|Density||1,1- 1,35 g/cm3|
|Tensile Strength||2,60 N/mm2|
|Max. Use Temperature||70 0C|
|Dielectric constant||2,7-3,0 @1MHz|
|Resistance (ohm/cm)||1012 - 1015|
Polyvinylchloride is the most
common,by far, thermoplastic used in cable produciton. From the insulation of
basic single wire household cable to high voltage power cables, PVC is used in
almost every segment and niche in cable production. One major
disadvantage of PVC that it emits Halogen gas in case of fire. Because of this
, it had been replaced by halogen free compounds in tunnels and public
building since mid 1990's.
Early researchers accidentally discovered PVC on at least two occasions in the 19th century. The first, in 1838, was by the French physicist and chemist Henri Victor Regnault and the second in 1872 by the German Eugen Baumann. On both occasions, the polymer appeared as a white solid inside flasks of the newly discovered vinyl chloride gas that had been left exposed to sunlight. PVC is a versatile polymer. To be used as an insulation material PVC has to be plasticized. PVC was first used as cable insulation as a replacement for rubber during the Second World War, but has now become the superior material through its flexibility, ease of handling in installation and inherent flame retardation. . PVC cables do not harden and crack over time and find use in many applications from telecommunications to electric blankets. Cable insulation is recyclable.