Processing Technology of Polyester (PET) Bottle

Update: 11-06-2020

Polyester plastic bottle (PET) is one of the most important packaging containers at present. It is mainly used for the packaging of medicines and carbonated beverages. Packing with detergent and other liquids. As a medicine packaging container, polyester bottles have many advantages. First of all, polyester bottles are light in weight, easy to form and have a strong bottle body. The strength and elasticity are significantly higher than other plastic materials, can withstand considerable impact without breaking, and is most suitable as a thin-walled, light-weight, high-strength pharmaceutical packaging bottle.

After the advent of PET bottles in China in the early 1980s, it rapidly developed with unpredictable momentum. In just 20 years, it has become the world's most important liquid and solid packaging container. In the application of pharmaceutical packaging, the weight of PET bottles is only about 1/10 of that of glass bottles when the volume of medicine is the same; the capacity of PET bottles with the same diameter is 1.5 times that of glass bottles. PET raw materials can be used to make transparent or opaque brown bottles.


Secondly, medical PET bottles have good gas barrier properties. Among the commonly used plastic materials, PET bottles have the best barrier to water vapor and oxygen, and can fully meet the special storage requirements of pharmaceutical packaging. PET has excellent chemical resistance and can be used for packaging all items except strong alkali and some organic solvents.


Third, the recycling rate of PET resin is higher than other plastics. When it is burned as waste, it is flammable due to its low calorific value of combustion and does not produce harmful gases. Fourth, food packaging made with PET meets food hygiene requirements, because PET resin is not only a harmless resin, but also a pure resin without any additives. It has passed quite strict regulations including the United States, Europe and Japan. Inspection by the Food Hygiene Law is considered a qualified and safe medicine and food packaging material. These advantages make polyester bottles a leader in plastics.


Currently, worldwide polyester production is increasing at a double-digit rate. Medical plastic bottles made of polyester as the main raw material are currently one of the most ideal packaging products in terms of appearance, gloss, physical and chemical properties and quality assurance.

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