A Study of the Electrical Insulation Characteristics of Oil-Impregnated Polypropylene Paper

The properties of polypropylene paper have been examined for possible use as an insulating material for power transmission cables carrying electric stresses excess of 500 kV. Typical physical and mechanical properties of dry and impregnated non-woven polypropylene are described. The effect of the composition of the impregnant on these properties was also investigated. Analyses of the results indicate that polypropylene webs could become a promising replacement for Kraft paper in cable insulation.