Insulating materials. Industrial rigid laminated sheets based on thermosetting resins for electrical purposes. Specifications for individual materials. Types of industrial rigid laminated sheets Electrical insulating materials, Sheet materials, Industrial, Laminates, Thermosetting polymers, Reinforced materials, Plastics, Solid electrical insulating materials, Epoxy resins, Melamine resins, Phenolic resins, Silicones, Polyesters, Polyimides