NHN Insulation paper is composed of a layer of polyimide film and its two sides of the Nomex1 paper (US DuPont paper), heat-resistant grade H (180 ℃) of the soft composite material, with good mechanical properties, such as tensile Strength and edge tear resistance and good electrical strength. The surface is smooth, when the production of low-voltage motor using automatic off-line machine to ensure trouble-free NHN is mainly used for high heat resistance of the motor slot, slot cover and phase insulation, It can also be used as an interlayer insulation for transformers or other electrical appliances.