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TAIZHOU WATON MACHINERY CO LTD [Zhejiang,China] Business Type:Manufacturer , Other , Retailer , Agent , Distributor/Wholesaler , Trade Company Main Markets: Africa , Americas , Asia , Caribbean , East Europe , Europe , Middle East , North Europe , Oceania , Other Markets , West Europe , Worldwide Exporter:81% - 90% Certs:CE, Test Report, ISO9001, UL

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Home > News > Why do PET raw materials need to be dried before preform production?

Why do PET raw materials need to be dried before preform production?

2021-12-04

1. Remove the water in PET

Because PET has a certain degree of water absorption, it will absorb a lot of water during transportation, storage, and use. High content of water will aggravate during production:

-AA (Acetaldehyde) increase in acetaldehyde. The influence on the smell of the beverage bottle, which causes the beverage to change its taste (but has little effect on the human body)

-IV (IntrinsicViscosity) viscosity drop. It affects the pressure resistance of beverage bottles and is easy to break. (Essentially caused by the hydrolytic degradation of PET)

2. Prepare high temperature for PET entering the Injection Molding Machine for shearing and plasticizing

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