What Materials are Included in Insulating Paper with Mechanical and Electrical Properties
Insulation paper is a general term for paper for electrical insulation. Used as insulation material for electrical equipment such as cables and coils. It usually includes capacitor paper, cable paper, telephone paper, dispensing paper, impregnated insulating paper, coiled-tube insulation paper, and powder mica paper. In addition to good insulation properties and mechanical strength, they also have their own characteristics.
Insulating crepe paper is an insulating material that is coated with special modified epoxy resin in a rhombic shape on electrical insulating paper. 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. 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 level of research and development of insulating crepe paper materials is one of the key factors affecting the development of electrical engineering. From the perspective of future trends, it is required to develop high-pressure-resistant, heat-resistant insulation, solvent-free and pollution-free insulation, composite insulation; corrosion-resistant, water-resistant, oil-resistant, cryogenic-resistant, radiation-resistant and flame-retardant materials, and energy-saving materials. The focus is on the development of epoxy mica insulation systems for high-voltage, high-capacity generators. F, H-class insulation series for small and medium-sized motors; sulphur hexafluoride gaseous medium for high-voltage transmission and transformation equipment; new non-toxic synthetic medium for replacing chlorinated biphenyl; high-performance insulating oil; synthetic paper composite insulation; Rubber and plastic materials and surface protection materials. At the same time, we must actively accelerate the replacement of insulation materials for traditional electrical equipment.