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Diamond dotted insulation paper is an insulating material that uses a special modified epoxy resin in a diamond shape on electrical insulating paper.

The products are widely used in interlayer insulation and turn-to-turn insulation of oil-immersed power transformers. In use, the coating layer begins to melt at a certain temperature during the drying of the coil, resulting in adhesion. The curing begins again as the temperature rises, allowing adjacent layers of the winding to be reliably bonded into a fixed unit. The adhesive strength of the epoxy resin is sufficient to prevent displacement of the layers of the winding during short circuit, thereby ensuring long electrical and mechanical properties of the insulation structure.

Dispensed paper is a soft composite material consisting of a polyester film on the middle and a Nomex paper on both sides, and a heat resistance class F (155 °C). The outer two layers are offset paper and the inner layer is a polyester film. diamond dotted paper combines the excellent high temperature resistance of NOMEX, the excellent dielectric strength against stretch tear strength and polyester film, mechanical properties, and soft grade F grade (155 °C). Suitable for slot insulation, turn-to-turn insulation and gasket insulation for Class F motors. The diamond dotted paper composite core has an inner diameter of 3 inches and can be supplied in rolls or cut into reels or sheets. The diamond dotted paper is about 60 to 70 KG per roll. The length can be determined according to customer requirements, and the width can be from 3.5 mm to 914 mm.

Since the resin coating of the diamond dotted paper is spotted, the immersion of the oil and the discharge of gas in the insulating material are ensured, and the corona and partial discharge are effectively avoided, thereby ensuring the safety and reliability of the insulating structure. It can also be used as a cable shielding isolation layer and anti-corona material for high-voltage motors and electrical appliances.

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