What are the common types of composite plastic packaging bags?

There are various commonly used types of composite plastic packaging bags, including edge sealed bags, bottom sealed bags, middle sealed bags, and three edge sealed bags classified by processing technology, as well as vacuum bags, steaming bags, aluminum foil bags, and other bag types classified by function. In addition, there are some special bag types such as self-supporting bags, zipper bags, shaped bags, etc., which can be selected and designed according to the characteristics and needs of the product.

1、 Classified by processing technology

1. Edge sealed bag: This is a common type of composite plastic packaging bag, characterized by heat sealing treatment on both sides of the bag to form a closed space. The edge sealed bag has a simple structure, is easy to make, and is suitable for packaging various products.
2. Bottom sealing bag: The bottom of the bottom sealing bag is heat sealed, while the upper part remains open. This type of bag is usually used for occasions where products need to be displayed or multiple uses are required, such as packaging for candies, nuts, and other foods.
3. Middle sealed bag: The middle sealed bag is subjected to heat sealing treatment in the middle of the bag, dividing it into upper and lower parts. This bag type is suitable for occasions where different products need to be separated or packaged separately, such as packaging for food items like potato chips and cookies.
4. Three sided sealing: The three sided sealing bag undergoes heat sealing treatment on all three edges of the bag, leaving only one opening for access. This type of bag has the characteristics of good sealing and neat appearance, and is commonly used for packaging products such as liquids and pastes.

2、 Classified by Function

1. Vacuum bag: A vacuum bag is a composite plastic packaging bag with a suction function that can eliminate air inside the bag and extend the shelf life of the product. Vacuum bags are commonly used for packaging products that require preservation, such as food and medicine.
2. Steaming bag: Steaming bag is a composite plastic packaging bag that can withstand high temperature cooking and can steam food at high temperatures without breaking or deforming. Steaming bags are commonly used for packaging cooked food, meat, and other products.
3. Aluminum foil bag: The aluminum foil bag contains aluminum foil material in the composite layer, which has good barrier and light shielding properties. Aluminum foil bags are commonly used for packaging products that require moisture, oxidation, and UV protection, such as tea and pharmaceuticals.

3、 Other special bag types

In addition to the common bag types mentioned above, there are also some special composite plastic packaging bag types, such as self-supporting bags, zipper bags, shaped bags, etc. These bag types are customized according to the characteristics and requirements of the product to meet the packaging needs of different occasions.