Environmental problems involved in the use of asbestos containing electrical insulations

Asbestos∗ papers and boards have been widely used in thermal and electrical applications ever since their inception. The introduction of asbestos papers and boards designed to function primarily as electrical insulation was achieved in 1948 through the use of more sophisticated fiber processing techniques and unique binder systems. The improved types available today have found broad use. They contain asbestos fiber in varying amounts up to a maximum of approximately 90%.