Plant #2 > PET - Solid Phase Condensation Polymerization Process
The PET plant produces PET resin for making PET bottles using PTA (Purified Terephthalic Acid) and EG (Ethylene Glycol) as raw materials. The PET plant operates the process of improving basic physical properties to enable PET bottles manfufacturing using amorphous PET chips. The production process of the amorphous chips was initiated in 1988 with the introduction of the amorphous chip production technology of Germany’s Inventa Fisher Corporation and crystalline chip production technology of Italy’s Sinco Corporation. Currently, its excellent physical properties have become a distinguished figure in the domestic PET bottle market. The major products are TB-180 and TB-380 used as heat-resistant PET bottles, including a use for PET sheets.
■ Production process
01 Dedusting and Precrystallization Sector
It is the stage wherein the surface of the chips is crystallized first by hot nitrogen to prevent the phenomenon of the chips sticking to one another under high-temperature process conditions.
02 Crystallization Sector
The PET chips that have gone through the surface crystallization stage in the previous process will have crystallization degree of approximately more than 45%.
03 Chips Production
The PET chips that have already gone through the crystallization stage will have molecular weight that can produce bottles after having gone through high temperature of over 200℃ for approx. more than 12 hours.
04 Chips Cooling Sector
The PET chips that have gone through the final reaction are finally dedusted at this stage and cooled down to 60℃ by cooled nitrogen and transferred to the product storage tank.
