Microwave welding of plastic foam

摘要

This patent proposes a new method of welding plastic foam mouldings using microwaves. The foam is coated with a dry, active material, i.e. material susceptible to microwave heating. In the novel process, the welding faces are dusted with pulverulent active material. Preferably surplus material is blown or brushed off. A suitable active material is ground coal and/or carbon black or soot