China's polyester containers are currently limited to biaxially stretched polyester blow bottles. China's biaxially stretched polyester blow-molded bottles started late in the plastic packaging industry, but they have achieved good results in beverage packaging represented by Coke since the introduction of injection-stretched PET bottle production lines from Japan in the 1980s. Subsequently, a large number of foreign advanced injection blow PET bottles were introduced. At the same time, on the basis of digesting foreign advanced technologies, a two-step PET stretch blow molding machine with independent intellectual property rights and suitable for China’s national conditions was developed.
It is used in conjunction with a universal injection machine and uses a PET preform made by a universal injection machine to blow PET biaxially stretched bottles. In domestically produced two-step biaxially stretched PET blow molding machines, some models can not only produce ordinary PET biaxially stretched bottles, but also heat-resistant biaxially stretched PET bottles. The volume of products that can be produced basically covers Imported equipment can produce vast areas ranging from tens of milliliters of vials to 5 gallons of vats. These simple blowing machines not only have the advantages of low cost and strong mobility, but also can produce bidirectional PET blow-molded bottles with good quality and good practicality. Therefore, they have been widely recognized by the plastic processing industry at home and abroad.
In addition to the large amount of domestic use, it has been partially exported for export. Although there is still a gap between these equipments and imported advanced equipment that has low production efficiency, poor automation, and poor product dimensional accuracy, for some of the most demanding applications (such as Coca Cola and Pepsi Cola products), There are still some difficulties in application. In addition, the production equipment for multi-layer co-blow PET bottles has yet to be developed in China, but the development and utilization of domestic two-step biaxially stretched PET blow molding machines have played a significant role in promoting the rapid development of PET bottles production.
At present, China's PET bottle manufacturers have the most advanced automatic PET bottle production lines manufactured by well-known companies in the world (such as Japan's ASB, Qingmugu's automatic PET bottle production line, France's SEDEL's automatic PET bottle The large-scale backbone enterprises of the production line and the full-scale PET bottle production line of Italy's SIPA Company also have a large number of small and medium-sized enterprises that have adopted various self-designed and manufactured simple, practical two-way PET blowers of different degrees of automation. Unprecedented flourishing and prosperous scenes.