Diamond dotted paper (DDP) is made of insulation paper coated by modified epoxy resin in the shape of rhombus. In the process of coil drying, the agglutinating and solidifying of DDP can bond the coil into a fixed unit. The bonding strength of epoxy resin is sufficient to prevent the displacement of the various layers of the winding in short circuit condition and further ensure the long-term mechanical and electrical properties of insulation structure.

Application

Diamond dotted paper DDP are widely used in the interlayer insulation and turn-to-turn insulation of oil-immersed power transformers. When used, the coating layer begins to melt at a certain temperature during the drying process, causing adhesion, and begins to solidify as the temperature rises. Adjacent layers of the windi