With the economic development, the packaging industry is also making continuous progress. In our lives, there are many medium containers, and packaging bags are one of them. So there are many kinds of packaging bags. Today I will talk about the classification of packaging bags for you. 1. According to the production process, it is often divided into: plastic packaging bags and composite packaging bags. 2. Classification according to production materials: high-pressure polyethylene plastic bags, low-pressure polyethylene plastic bags, polypropylene plastic bags, polyvinyl chloride plastic bags, etc. 3. Classification by appearance: vest bag, straight bag, three-dimensional bag, square bottom bag. Sealed bags, plastic bags, shaped bags, etc. 4. Plastic packaging bags include plastic woven bags and plastic film bags.