... into different colour fractions: transparent or uncoloured PET, blue and green coloured PET, and the remainder into a mixed colours ... are removed during the process, resulting in pure PET fragments, or "PET flakes". PET flakes are used as the raw material for ... , pillows, carpets, etc.), polyester sheets, strapping, or back into PET bottles etc.3)Melt filtrationIt is used to remove contaminants from ...