What do you know about PET preform injection molding?

2021-10-23

PET preform is a typical injection molding product, which is easy to transport. It is mostly made of plastic material with uniform texture and good insulation. It is an intermediate product for plastic bottles and oil drums. Under a certain temperature and pressure, the mold is filled with raw materials and processed by the Injection Molding Machine to form a bottle blank with a certain thickness and height corresponding to the mold. Polyethylene terephthalate is the most important type of thermoplastic polyester. The English name is Polythylene terephthalate, referred to as PET or PETP (hereinafter referred to as PET), commonly known as polyester resin. It is a polycondensate of terephthalic acid and ethylene glycol. Together with PBT, it is collectively referred to as thermoplastic polyester, or saturated polyester. PET is a milky white or yellowish highly crystalline polymer with a smooth and shiny surface. Creep resistance, fatigue resistance, friction resistance and dimensional stability, low abrasion and high hardness, have the greatest toughness among thermoplastics; good electrical insulation performance, less affected by temperature, but poor corona resistance. Non-toxic, weather resistance, good chemical resistance stability, low water absorption, resistance to weak acids and organic solvents. PET bottles are often used for packaging, and packaging is often stacked in layers during transportation or inventory. At this time, we will consider the ability of the lowest level to bear pressure. During the PET bottle compression test, place the PET bottle in the two horizontal pressure plates of the machine, start the PET bottle compression machine of Suzhou Ou Instrument, and the two pressure plates will be pressurized at a certain test speed. The instrument will automatically stop and automatically save the data when it is added. The routine testing of PET bottles includes bottle wall thickness testing, compression resistance testing, and bottle cap opening fatigue testing. PET manufacturers have their own quality inspection department. PET bottles have strong applicability and are widely used in daily necessities, daily chemical packaging and other fields. From mold processing to machinery and equipment, they are very picky, easy to get started, but difficult to do. PET preforms are reprocessed by blow molding to form plastic bottles, including bottles used for packaging cosmetics, medicines, health care, beverages, mineral water, reagents, etc. This bottle-making method is called a two-step method, that is, the preform is formed by injection molding. A method of forming PET plastic bottles through blow molding.

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