NPN is a 3-layer laminate consisting of Nomex® - polyester film - Nomex®. For standard NPN laminates, calendered Nomex® aramid paper is used. In NPN laminates, the good mechanical and electrical properties of the polyester film are ideally complemented by the excellent thermal properties of the Nomex® aramid paper. A distinction is made between NPN/50 - 50 µm Nomex®, NPN/80 - 80 µm Nomex® and NPN/130 - 130 µm Nomex® Depending on the thickness of the polyester film, this results in total thicknesses of 0.17 to 0.63 mm. NPN is often used as an insulating material in electric motor construction. The combination of the extremely heat-resistant Nomex® and the dimensionally stable polyester film is ideal for use as slot insulations⇱, phase insulation⇱ punched parts⇱ or cover sliders⇱.
NPN laminates are also available in a version with Nomex® 411, i.e. a 3-layer laminate in which uncalendered Nomex® 411 aramid paper is used.