Techsil & Panacol adhesive for filament winding processes

Vitralit UD 1405 can be used to wrap components such as hybrid rotor shafts for electric motors and high-voltage surge arresters. The adhesive-coated fibre-reinforced windings can be then be quickly cured with UV/visible light. This innovative winding process is extremely space and time-saving, and can produce significant processing cost savings.

Available through Techsil in the UK, Panacol’s Vitralit UD 1405 is a transparent, solvent-free, one-component epoxy. Due to its low viscosity, Vitralit UD 1405 has very good wetting properties. It can be cured in seconds by irradiation with UV (365nm) or Visible (405nm) light wavelengths. Depending on the fibre material and the wavelength used, layer thicknesses of several millimetres can be achieved exclusively by UV/Visible light curing.

This epoxy can also be thermally cured after UV exposure to ensure that a complete cure is secured in areas shadowed from the UV light. For example, fibres or filaments can first be pulled through an adhesive bath, then wound onto the rotor or respective cylinder, and cured with UV or visible light. A secondary thermal cure will ensure that the layers of coated windings below the surface become fully cured.

Techsil can also offer the most efficient UV curing system for fibre and filament winding processes, the LED Powerline AC/IC 820 HP from UV specialist Hönle. With intensities of up to 16,000mW/cm², this LED system ensures very fast curing. Its light emission window is available in two standard sizes, 82x20 mm and 122x20 mm, which can be extended without gaps by stringing together multiple modules.

After curing, Vitralit UD 1405 is electrically insulating, shows minimal shrinkage and remains resistant at temperatures from -40 to 180°C. A glass transition temperature of over 130°C ensures reliable performance even under dynamic load at elevated temperatures.