Ultrasonic sealing:

It is a blister packaging process that uses an ultrasonic machine to generate ultrasonic waves to bond the blister and the blister together to form a double blister package. Unlike high-frequency sealing, ultrasonic waves can not only seal PVC and PETG materials, but also It can seal PET materials and has no electromagnetic damage to the packaged products. It is especially suitable for the packaging of electronic products. The disadvantage is that the ultrasonic edge sealing can only be spaced dots, and generally only one straight edge is sealed at a time.