Analysis Of The Characteristics Of PP Plastic Bottles
Bottles made of PP materials are processed and blow-molded, we call them PP bottle packaging. Unlike plastic bottles such as PET, PE, and PVC, PP bottle packaging has its own advantages and market positioning. First of all, the PP bottle is not completely transparent, which makes it have a certain degree of protection from light, which is suitable for products that need to avoid light. Secondly, the translucent PP bottle packaging has some transparent properties, so that consumers can see the inside of the product, especially some foods can be attractive.
Forming of PP beverage bottles
The PP beverage bottle is hollow molded by the injection stretch blow method, that is, the molten PP injected by the injection molding machine is injected into the injection mold, and a transparent bottomed parison is formed by rapid cooling, and then the parison is heated inside and outside in another station to reach a certain level. After the temperature, the preform is extended to a certain proportion, and then filled with compressed air to obtain the desired hollow product. This molding method is characterized by the same stretch ratio in the axial direction and the radial direction, which can improve the mechanical properties, seepage resistance, transparency properties of the blow molded container, and reduce the wall thickness of the product, which is the wall thickness of the product in blow molding. The thinnest one. It has the advantages of uniform wall thickness, good dimensional stability, light weight and high strength, so it has a wide range of applications. The injection stretch blowing process can be divided into fully automatic one-step method and fully automatic two-step method. The main representatives of the one-step process are SIPA from Italy, Aoki from Japan and ASB from Japan. The characteristic of the two-step process is that the preform is completed on a special high-speed injection molding machine, and its production efficiency is generally high. Krupp's injection molding machine, etc. According to reports, the injection-stretch-blow PP beverage bottle processing equipment developed by Hong Kong Environmental Technology Group and Dongguan Jiahong Machinery Manufacturing Co., Ltd. also adopts a two-step production process, but the process is relatively simple. Since there is no need to dry the raw materials, and also do not need to carry out the shaping and bottle mouth crystallization treatment, the process is easier to control, the equipment investment is less, and the flexibility is large. It can produce ordinary PP beverage bottles on the same set of equipment. Hot-fill bottles can be produced, and the set-up time of the equipment is also very short.
