Transparent self-sealing bags in department stores are common daily necessities in our daily life. In most cases, every household will use transparent self-sealing bags to contain some fragmentary parts, small items that are difficult to organize and food that needs to be isolated from the air. There will be transparent self-sealing pockets for sale at the local Nissan department store. Self-sealing bag is a kind of packaging bag that can be sealed automatically by pressing. Generally, there are dense bags, keel bags and zipper bags.