Hollow blow molding, a rapidly developing plastic processing method. The blow molding process began to be used to produce low density polyethylene vials during World War II. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology has been widely used. The volume of hollow containers can reach thousands of liters, and some production has been controlled by computers. The plastics suitable for blow molding are polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting empty containers are widely used as industrial packaging containers. According to the production method of billet, blow molding can be divided into extrusion blow molding and injection blow molding, and the newly developed multi-layer blow molding and tensile blow molding.

Extrusion blow molding is a method of making hollow thermoplastic parts. Well-known blow molding objects are bottles, buckets, cans, boxes, and all containers that package food, beverages, cosmetics, medicines, and daily necessities. Large blow molding containers are commonly used in the packaging of chemical products, lubricants and bulk materials. Other blow molded products include balls, bellows and toys. For the automotive industry, fuel tanks, car shock absorbers, seat backs, center brackets, and armrests and headrest covers are blow molded. For machinery and furniture manufacturing, blow molded parts are shells, door frames, frames, clay POTS, or boxes with an open side.

Generally common are People's Daily necessities such as: bottles, cans, baby products, sporting goods and so on