Thermoplastic flow (cut-through) temperature of this insulation is in the 250°C plus range; well above maximum process conditions found in molded coil work, trickle impregnation process and standard pre-heat varnish cycles specified for normal Class 130, 155 and 180 systems. Polyurethane solderable type resin coatings. It solders consistently at temperatures as low as 390°C.
Flexibility and adhesion properties of this magnet wire film are more than adequate for all but the most severe fine wire winding applications. Polyurethane exhibits high dielectric strength retention under high humidity conditions. Polyurethane exhibits high dielectric strength retention under high humidity conditions. Also, the low dissipation factor of this insulation at high frequencies makes it a prime candidate for RF coil application. The solvent resistance properties of polyurethane are suitable for most Class 105, 130, and 180 varnishes, encapsulates, and treating resins. It has improved salt-water resistance compared to other solderable insulations.