Electrically insulating material for composite insulators, process for the production of composite insulators, and composite insulators.

摘要

An electrically insulating material to be used for a housing in a composite insulator has a structure in which the housing is formed around the outer periphery of an insulating supporting member inside a mold through vulcanization by heating at high temperature under high pressure, wherein the electrically insulating material comprises an electrically insulating component and a thermal expansion coefficient-regulating material added in such an amount as to give a coefficient of linear thermal expansion of the electrically insulating material not more than 1.5 x 10<-><4>/ DEG C. A composite insulator is also disclosed, which has a housing made of said electrically insulating material around a core. Further, a process for producing such a composite insulator is disclosed.