Knowledge about PET bottle preform injection molding

October 13, 2022

What do you know about Pet Bottle Preform injection molding?

PET preform is a typical injection molding product, which is easy to transport, mostly made of plastic material, with uniform texture and good insulation. It is an intermediate product of plastic bottles and oil drums.Under a certain temperature and pressure, the mold is filled with raw materials, and under the processing of the Injection Molding Machine, it is processed into a preform with a certain thickness and height corresponding to the mold.Polyethylene terephthalate is the most important variety of thermoplastic polyester, English name 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, and together with PBT, it is collectively referred to as thermoplastic polyester, or saturated polyester.PET is a milky white or pre-yellow highly crystalline polymer with a smooth and shiny surface, good creep resistance, fatigue resistance, friction resistance and dimensional stability.

It has low abrasion and high hardness, and has the greatest toughness among thermoplastics; it has good electrical insulation properties and is less affected by temperature, but has poor corona resistance. Non-toxic, weather resistant, good chemical stability, low water absorption, weak acid and organic solvent resistance.

PET bottles are often used for packaging, and the packaging is often stacked in layers during transportation or inventory. At this time, we will take into account the pressure tolerance of the bottom layer. 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, and the two pressure plates will pressurize at a certain test speed. The instrument stops automatically when it crashes and saves the data automatically. The routine inspection of PET bottles includes bottle wall thickness inspection, compression resistance inspection, and bottle cap opening fatigue inspection. PET manufacturers have their own quality inspection departments. 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 extremely picky, easy to get started, and difficult to do. PET preforms are reprocessed by blow molding to form plastic bottles, including bottles used for packaging of cosmetics, medicine, health care, beverages, mineral water, reagents, etc. A method of forming a PET plastic bottle through blow molding.

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