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Insulating bar is made of several kinds of insulating materials, such as high quality glass fiber cloth, epoxy resin and 306 resin phthalic anhydride, glass fiber reinforced plastic cloth and curing agent. After the first high temperature, the mold was first fixed on the mold and then the die was removed; after second high temperature grinding, a rough grinding, two fine grinding, and then made into other glass steel products in the paint.

Insulation materials are widely used in many fields such as electrical appliances, electronic information, automobile and aerospace. The insulation materials such as insulating varnish, insulating paper, insulating tube, insulation board and so on are also developing very well. In recent years, the innovative application of insulation materials has gradually become one of the key driving forces for sustainable energy development in China.

High voltage insulating bar is used for insulating tools operating at short time for electrified equipment, such as connecting or disconnecting high voltage isolating switch, falling fuse and so on. The surface of the insulating rod is smooth, without bubbles, wrinkles or cracks; the bonding between glass fiber and resin is intact; there is a plug at the end of the hollow pipe, and the joints are firmly connected.

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