Introduction: In daily life, the goods we purchase will be packaged. A large part of the goods are packaged through the shrink film packaging machine. The shrink film packaging machine is based on POF, PP, and PVC shrink film. Shrinking in one automatic shrink packaging machine, widely used in beverages, gifts, hardware, cosmetics, toys, plastics, bamboo and other products packaging. With the development of technology, shrink film packaging machines also have different packaging methods. According to different packaging methods, shrink packaging machines can be roughly divided into the following three packaging forms: PP plastic, also known as polypropylene plastic, is another fine resin varieties, following the development of nylon, which is a semi-crystalline materials, the advantage is obvious, with excellent mechanical properties and heat resistance, with a high not hydrophilic sex, almost non-absorbent. The disadvantage is poor low temperature impact resistance, easier to aging. However, for comparison PE plastic having a higher melting point.
PE plastic is polyethylene plastic, its corrosion resistance and electrical insulation are very strong. Rigid hardness and strength are relatively high, and the same PP plastic, it also very small water absorption.
Polycarbonate (referred PC) is a polymer molecular chain containing a carbonate group, an ester group according to the structure can be divided into aliphatic, aromatic, aliphatic - aromatic and other types. Which due to the aliphatic and aliphatic - aromatic polycarbonate lower mechanical properties, thereby limiting its application in engineering terms. Currently, only the aromatic polycarbonate obtained industrial production. Due to the special nature of the polycarbonate structure, it has now become the top five fastest growing engineering plastics in general engineering plastics.
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1. Open ends
It uses a tubular film or a flat film to wrap the package in a sleeve and then perform heat shrinking operation. After the package is completed, there is a shrinkage opening at both ends of the package.
2. Four sealed
The product is wrapped around with a flat film or a tubular film with a lap-type seal. For product packaging that requires sealing.
3. Open end
Pallet shrink packaging is a typical example. First, the film is made into a square bottom large bag, and then the large bag is put on top of the stacked product trays, and then heat-shrinks. Place the loaded product tray on the conveyor belt and put on the shrink film bag; send it into the heat shrinkage channel through the conveyor belt, and shrink the package after the heat shrinking channel.
The above is a shrink film packaging machine with different packaging methods. Go and buy it according to your needs.