Introduction

Food packaging bag is a kind of packaging design, in order to facilitate the preservation and storage of food in life, product packaging bags are produced. Food packaging bags refer to film containers that are in direct contact with food and are used to hold and protect food.Stand-up pouch is a relatively novel packaging form, which has advantages in many aspects such as upgrading product grade, enhancing shelf visual effect, portability, convenient use, preservation and sealability. The stand-up pouch is made of laminated PET/foil/PET/PE structure, and can also have 2 layers, 3 layers and other specifications. It depends on the different products of the package. An oxygen barrier protective layer can be added as needed to reduce the oxygen permeability , Extend the shelf life of the product.