The classical scheme for the production of polyethylene terephthalate (PET granulate) for food purposes is based on the polymerization of the main raw materials: ethylene glycol (EG) and terephthalic (TFA) acid by melt polycondensation.
To obtain a food-grade polymer, subsequent solid-state additional polycondensation (SSP) is required, which increases the molecular weight of the polymer and reduces the content of acetaldehyde and ethylene glycol to acceptable values.
The 2R-MTR® (Melt-to-Resin *) technology from Uhde Inventa-Fischer is the most advanced bottleneck food grade PET technology available.
The use of 2R-MTR® technology eliminates the need for solid-state polycondensation (SSP) and allows the production of high molecular weight PET with improved performance.
The absence of an SSP installation allows to reduce the time of polymer production, which positively affects the quality characteristics of PET.
Thanks to the 2R-MTR® technology, EköPet PET produced by Ecopet AS has a number of advantages, such as a lower melting point and lower crystallinity.
The spherical shape of the granules and the absence of an SSP installation ensures a minimum dust content in the product.