BSN-4522 internal circulation shrink tunnel machine is used by heating the shrinkable film wrapped around the product or package. Make the shrinkable film shrunk tightly on the product or package. Fully show the appearance of the product and improve its display. increase the sense of beauty and value. At the same time, the packaged goods can be sealed, moisture-proof, anti-pollution, and protect the goodsfrom external impact with a certain buffer.Especially when packaging fragile goods,it can prevent broken equipment flying. In addition,it can reduce the possibility of products being, dismantled and stolen. it is suitable for heat-shrinkable packaging of glass bottles, plasticbottles, paper cups and other containers in food, beverage, medicine, cosmetics and other industries.