Heat shrink packaging is a popular packaging method currently used in the daily chemical industry. It uses shrink film to wrap the outside of the product, and then heat it to shrink the packaging material to wrap the product tightly, fully demonstrating the display ability of the item, and increasing the beauty and sense of value. ; At the same time, the packaged items can be sealed, moisture-proof and pollution-proof. In addition, the possibility of product being dismantled and stolen can be reduced.