Customized food bags - food packaging bag manufacturers - food packaging bag manufacturers - food packaging bag manufacturers to share with you the common bag shapes of food packaging bags are as follows:
1. Three side sealing bag
The three-side seal bag has two side seams and one top seam, and the bottom edge is formed by folding the film horizontally. The bags are available with or without a hem, and when they have a hem, they can stand upright on a shelf. A variant of the three-side sealed bag is to realize the bottom edge formed by folding it by bonding, which essentially becomes a four-side sealed bag.
2.Back seal bag
Back seal bags are also called pillow bags. The bags have back, upper and lower seams, making them have the shape of a pillow. Many small food bags are often packaged in pillow bags. The back seam of the pillow bag forms a fin-like envelope, in which the inner layers of film are brought together and sealed with the seam protruding from the back of the enclosed bag. Another form of sealing is overlapping sealing, in which the inner layer on one side is bonded to the outer layer on the other side to form a flat seal. Because the "fin" shape seal is relatively strong, and as long as the inner layer of the packaging material is heat sealed, it is widely used. The "overlapping" shape seal is relatively weak, and requires the inner and outer layers of the bag to be heat-sealed, so it is not used much.
The top and bottom seals are bonded to the bag inner material.
3. Folded back seal bag
Folding bags are also called folding bags and organ bags. They are the deformation of the back sealing bag, and the two sides of the bag are folded in to form an M shape. If the M-shaped is asymmetrical, it is also called a trapezoidal hemmed bag.
4. Self-sealing zipper bag
Easy-to-open zippered pockets on three side seal pockets and main body pocket.
5. Three-dimensional bag
There are many kinds of three-dimensional bags, mainly including the following types:
① The bottom-up boat-shaped stand-up bags.
②Fold bottom integrated three-dimensional bag.
③Slanted knife heat-sealed three-dimensional bag.
④Bottle-shaped knife mold three-dimensional bag.
⑤The three-dimensional bag with mouth is divided into three-dimensional bag with oblique mouth and three-dimensional bag with roof cover.
⑥ Air pressure stand-up bag.
6. Special-shaped bag
Fruit-shaped, cartoon-shaped and other shapes bag-shaped.
7. With hand hole pocket
The hole shapes include triangle, butterfly, airplane, round hole, semicircle, waist drum and so on.