Flow chart of the PET DMT process

Polyester fibres are produced from a specific operation that combines polymerisation, spinning and drawing. This process is continuous and uses (as raw materials) terephthalic acid and ethylene glycol to produce polyester yams. This process yields a high viscosity polymer. This is accomplished by the following process steps  

Also the production of PET for food packaging is based on the same process (with the addition of di-ethyleneglycol and isophthalic acid as raw materials). 

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