Blow molding

Blow molding, also known as hollow blow molding.It is a rapidly growing plastic processing method. The blow molding process began to produce low density polyethylene vials during the 2nd World War. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology was widely used. Hollow containers can be up to several thousand liters in volume, and some  production have been computer controlled. Suitable plastics for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the produced hollow containers are widely used as industrial packaging containers. According to the parison making method, blow molding can be divided into extrusion blow molding and injection blow molding, and newly developed ones have multi-layer blow molding and stretch blow molding.