Thermoplastic hard plastic sheets such as polyvinyl chloride or polyvinyl chloride are heated and softened, and the plastic sheets are formed into containers containing materials by means of vacuum suction or punch punching, which are cooled and shaped, and then filled with materials. Then it is heat-sealed with a layer of adhesive-coated aluminum foil or cellophane, composite materials, etc., and finally cut to complete the packaging. The packaging machine that can achieve this series of tasks is called thermoformed packaging machine.
This type of thermoformed packaging machine was originally designed for packaging tablets, capsules, injections, etc. The packaged product is in the shape of a blister (hence the name of the blister package), which is transparent and visible, and is very convenient for the storage, carrying and taking of the medicine.
The packaging method has now been developed to be able to pack any material in any form. The container obtained by thermoforming is not only in the shape of a small blister, but can be in the shape of a larger plate, cup, or bowl for packaging food, daily necessities, electrical components, and the like. This kind of packaging has the advantages of light weight, good airtightness, strong adaptability, transparency and visibility, no additional cushioning material required for packing, and convenient sales and consumption. Therefore, it has developed rapidly in recent years. In line with this, thermoformed packaging machine have also developed rapidly in recent years.