Can Be Cut As Needed When Applying Diamond Dotted Paper
Diamond dotted paper is used for the interlayer insulation of foil-type transformers and common transformer non-impregnated coils. The rhombic coating on the diamond dotted paper hardly undergoes a curing reaction at normal temperature. When it is heated, the curing reaction proceeds rapidly, and a cured product having good mechanical and electrical properties and heat resistance and oil resistance is formed, so that adjacent portions are bonded together as a whole.
Its application greatly shortens the production cycle of the transformer, saves a lot of energy and organic solvents, thereby reducing costs and reducing environmental hazards. In addition, since the coil does not need to be immersed in paint, the transformer oil can penetrate into the inside of the coil through the uncoated portion to form an oil-paper composite insulation system with high insulation strength, and the cooling effect is good and the temperature rise is low. This improves the stability of the operation of the transformer.
The special modified epoxy resin is an insulating material on the electrical insulating paper in a rhombic shape. 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.
Since the resin coating of the diamond dotted paper is punctiform, the immersion of the oil and the discharge of gas in the insulating material are ensured, and 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.