How To Distinguish Insulation Paper DMD, DM And DMDM

The full name of DMD insulation paper is a polyester film & polyester fiber non-woven fabric soft composite material, which is a compound of a layer of polyester film coated with an adhesive and a polyester fiber non-woven fabric on one side. There is also DM, which is a two-layer soft composite insulating material bonded by polyester film polyester fiber nonwoven fabric, so what is the difference between the two?

DM refers to two-layer composite insulation paper, DMD refers to three-layer composite insulation paper, where D is Dacron, refers to polyester non-woven fabric. M refers to polyester film. DMD insulation paper is a composite product with two layers of polyester on the outside and a layer of polyester film in the middle and glued together with glue.

The number of layers is different. It is composed of two to four layers of polyester film and polyester thousand-dimensional non-woven fabric with adhesive, two layers are DM, three layers are DMD, and four layers are DMDM. All have good mechanical and electrical properties, suitable for slot insulation, inter-turn and inter-layer insulation, liner insulation, transformer insulation and other electrical insulation for small and medium-sized motors, and the heat resistance level is B level.