There are many types of packaging bags, and there are usually four common types
The Doypack
The pocket is round at the bottom and flat at the top. No matter what kind of shelf it is placed on, it can stand naturally and smoothly. A stand – up bag usually contains a seal.
The Side Fold Bag
Side folding bag is a more traditional packaging style, affordable and easy to use. A little more dressed beans, simple and unique appearance. Side folding bags don’t stand up very well, but they are more solid. Side folding bags usually do not have a seal and are folded down from the top of the bag for use, then tied securely with a label or tin bar.
The Quadro Seal Bag
The square sealing bag is similar to the side folding bag. The difference is that the four corners of the square sealing bag are sealed and the appearance is square. It can also be installed with sealing strips.
The Box Pouch/Flat Bottom Bag
The square appearance of the box/flat pouch makes it look like a box. It has a flat bottom, can not only stand smoothly, but also has a huge market. It comes in a variety of sizes with optional sealing strips. American flat bags are a bit different from European ones, which tend to be rolled up like a compact brick package, while the latter are usually fitted with a seal.
