Microwave Characteristics During PET Material Microwave Vacuum Drying Process with Dual-channel

PET(polyethylene terephthalate) is widely used in daily life. With food packaging production steadily increased all over the world, traditional drying for PET materials shows weakness. This work is based on dual-channel microwave power input, which realized PET drying with the minimum at -92kPa and microwave power range is 200W to 500W. Moreover, by means of program, adapting the solid state source to the drying chamber eventually obtains the connection between microwave characteristics and material properties. When the phenomenon of thermal runaway was prevented, the inhibition of reflection power made drying better and the highest temperature corresponds to the best point of moisture content.