Minimize material losses, maximise product quality

Like in most recycling processes, companies such as World PET Recycling face the challenge of removing contaminants from recycled PET to meet the strict quality standards for food-grade materials. A major source of contamination is metallic foreign bodies, which can enter the material during the collection, processing, and preparation of plastic waste. To tackle this challenge, World PET previously used a GF metal separator to inspect PET flakes in the main material feeding line and remove metallic contaminants. However, this process led to significant PET material loss, as the entire contaminated fraction, including valuable material, was rejected.

Sesotec´s partner in Portugal, Iberoacero provided a customized solution to this problem with the installation of the RE-SORT RV 070 unit. The RE-SORT functions as a secondary filtering system, complementing the existing GF metal separator by re-inspecting the reject fraction from the initial separation.

The material is fed into the RE-SORT unit via a hopper and is isolated through a vibratory feeder. It then passes through two key components of the system: the Extractor magnetic system and the Rapid Vario-FS metal separator. Together, these technologies ensure that both magnetic and non-magnetic metal contaminants are reliably removed.

A major advantage of the RE-SORT unit is its high sensitivity, enabling it to detect and remove even the smallest metal particles, less than 1 mm in size. This ensures compliance with the strict quality requirements for food-grade rPET and minimizes the loss of high-quality material.