How the valves are integrated

WICOVALVE® valves are applied with heat or ultrasound. Automatic sealing takes place during the packaging process on form, fill, and seal equipment. However, we also supply prefabricated stand-up pouches and gusset bags with integrated valves.

Depending on the packaging process, degassing valves are applied with thermal or ultrasonic sealing. To assure optimized valve functionality, the WICOVALVE® overpressure valve is sealed on the inside of the laminate. The valve body will adhere to the sealing medium of the film, either on polyethylene (PE), polypropylene (PP) or Ecovio® (bio compostable material). The choice of valve has also an impact on the design of the production equipment.

All deflection rollers as well as the forming shoulder and the filling tube must be recessed at the valve position to prevent the valves from being torn off. Additionally, the parallelism of the seal tooling must be adjust-able on the machine. To guarantee optimized degassing, we recommend punching a hole or a cross slot in the film.