Some knowledge about PET bottle preform injection molding.

PET bottle preforms are typical injection molding products, easy to transport, mostly made of plastic, with uniform texture and good insulation. They are an intermediate product for plastic bottles and oil barrels. 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 bottle preform with a certain thickness and height corresponding to the mold. Polyethylene terephthalate is the most important variety of thermoplastic polyester. Its English name is Polythylene terephthalate, abbreviated as PET or PETP (hereinafter referred to as PET), commonly known as polyester resin. It is a condensation polymer of terephthalic acid and ethylene glycol. Together with PBT, it is collectively called thermoplastic polyester, or saturated polyester. PET is a milky white or yellowish highly crystalline polymer with a smooth and shiny surface. It has good creep resistance, fatigue resistance, friction resistance and dimensional stability, low wear and high hardness, and has the largest toughness among thermoplastics; good electrical insulation properties, little affected by temperature, but poor corona resistance. Non-toxic, weather-resistant, stable against chemicals, low water absorption, resistant 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 pressure tolerance of the lowest layer. During the PET bottle pressure test, place the PET bottle on the two horizontal pressure plates of the machine, start the PET bottle pressure machine of Suzhou Ou Instruments, and the two pressure plates will be pressurized at a certain test speed. When loading, the instrument automatically stops and saves data. Routine testing of PET bottles includes bottle wall thickness testing, pressure resistance testing, and bottle cap opening fatigue testing. 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. It is easy to get started but difficult to master. PET bottle preforms are processed again through blow molding to form plastic bottles, including bottles used for packaging cosmetics, medicine, health care, beverages, mineral water, reagents, etc. This bottle making method is called a two-step method, that is, the bottle preform is formed through injection molding, and then A method of forming PET plastic bottles through blow molding.

Post time: Nov-14-2023