First,HDPE plastic bags is mainly used for: garbage bags, fungus bags; 

convenient bags, shopping bags, handbags, vest bag; plastic bags; inner bags of woven bags

Second,PVC plastic is mainly used for: gift bags, luggage bags, knitting cotton goods bags, cosmetic bags; zipper bags, file packets.

Third, LDPE plastic bags is used for: food packaging: cakes, candy, roasted seeds and nuts, biscuits, milk powder, salt, tea, etc; 

fiber packaging products: shirts, clothing, knitting cotton materials, chemical products; daily chemical products packaging.

Fourth,Polypropylene plastic bags is used for packaging textiles, knitting cotton goods, clothing, shirts and so on.