PET Manufacturing Process
Both supply sources manufacture bottle-grade PET resin by submitting AMPET (AMorphous PET) resin to a solid-state polymerization (“SSP”) treatment. In turn, firms manufacture AMPET resin from a controlled chemical reaction between the petro-based chemical terephthalic acid (“TPA”) and the natural gas-based chemical ethylene glycol (“EG”) in a melt-phase polymerization treatment. A manufacturer must operate an SSP treatment facility where it converts AMPET resin into bottle-grade PET resin to be considered a producer of PET resin.
PET resin producers have both the melt-phase polymerization capability to produce AMPET and the solid-state polymerization capability to produce PET resin. DSR is vertically integration from raw material PTA/PX to bottle-grade resin and is FDA approved in USA.
Bottle-grade PET resin is produced by submitting AMPET resin to a solid-state polymerization treatment. This SSP treatment increases the IV of the polyester pellet to a level within the range of IVs as defined within the scope of these investigations. The amorphous chip’s raw material feedstock’s, TPA and EG, are based on para-xylene and ethylene, respectively, from the petrochemical industry; thus, TPA and EG feedstock prices for the manufacture of AMPET resin are variably dependent upon prices in the larger petrochemical industry.
TPA and EG account for approximately 98 (%) percent of AMPET resin by weight and an estimated 75 to 80 percent of PET resin by cost.
AMPET resin producers usually modifypolymer properties by incorporating nominal amounts of copolymer chemical reactants such as isophthalic acid (IPA) at levels of 2 to 3 percent by weight.
An SSP treatment essentially bakes the AMPET resin chips in large cylindrical reaction towers. In these towers the AMPET chips flow through an oxygen-free, nitrogen gas atmosphere at temperatures above 200°C for a period of 18-24 hours. Once the baking is completed, the resin pellets exit the bottom of the reaction tower where air cooling takes place in a closed circuit heat exchanger prior to storage for transport by rail or truck.
As PET Bottle Resin supplier, Pacific Rim Traders (Pacific Rim PET) works to provide quality polyethylene terephthalate (PET bottle/film resin) for use in a wide variety of products. PET bottle resins have good barrier properties against oxygen and carbon dioxide. PET is the most recycled resin in the world.
PET Bulk Supply