display the sales items, so as to increase the sense of beauty and value;
2. Meanwhile, the packaged items can be sealed,and prevent moisture, pollution. And to protect the goods from external shocks, has a certain buffer capacity. When the shrink film shrinks generated a certain tension, it can macke a group of items to be packaged bind tightly played a role of a binding rope, especially for multi-items in the group set and tray packaging, so this product can be widely used in various sm