Product Curing Conditions of Diamond Dotted Paper
Insulating paper is a special modified epoxy resin coated on a high-performance insulating paper in a rhombic shape, which is applied to interlayer insulation and tantalum 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.
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 the displacement of the layers of the winding during the short circuit, thereby ensuring the long-term mechanical and electrical properties of the insulation structure.
The resin coating of the insulating paper is in the form of dots, which ensures the immersion of the oil and the discharge of gas in the insulating material, effectively avoiding corona and partial discharge, thereby ensuring the safety and reliability of the insulating structure. First, it was kept at 90 ° C ± 5 ° C for 3 hours, and then heated to 125 ° C ± 5 ° C for 6 hours to achieve complete curing. Storage: Store in a dry and clean room at a temperature not higher than 25 °C. Keep away from fire, heat or sunlight. The storage period is one year. If it exceeds the storage period, it can still be used after passing the inspection.