Heat Sealing: It is a plastic packaging technology. The paper card coated with plastic oil on the surface and the bulb are heat sealed together to form a blister card package.

Ultrasonic sealing: It is a kind of blister packaging technology. Ultrasonic machine is used to generate ultrasonic waves, and the bubble shell and the bubble shell are bonded together to form a double blister package. Unlike high frequency sealing, ultrasonic waves can not only seal PVC and PETG. Material, PET material can also be sealed, and there is no electromagnetic damage to the packaged product, especially suitable for electronic product packaging; The disadvantage is that the ultrasonic edge sealing can only be a point-like interval, and generally only one straight edge at a time.