PET plastic bottle sorting and physical treatment process closely. There are two main physical recovery process: First, the waste PET plastic bottle chopped into pieces separated HDPE, aluminum, paper and adhesives from the PET, PET debris and then washed, dried, granulated; the second is the first on the non-PET waste PET plastic bottle caps, seat bottom, label and other impurities mechanically separated and then washed, crushed, granulated. Recycled PET shall not contain PVC impurities, otherwise it will affect the color of PET. Can be artificially separated when PVC is mixed in a relatively small amount on a conveyor belt, namely that when the torque effect of PVC and PET plastic bottles have different melting points in different part of the force, PET and PVC crushed by debris containing heater and temperature conveyor control, PVC melted after being adhered to the conveyor belt, so that the PET can be separated. Labels on beverage bottles can be separated after crushing the bottle blower and cyclone separator to remove the combination device. Also preclude the separation means separating column by pumping, crushing PET debris from the top of the vertical separation column, countercurrent debris updraft formed using PET label debris difference in specific gravity, is removing labels, PET from the bottom of the separator out of order guarantee label separation efficiency in production may preclude the use of two or more separate devices. PET flakes washing is very important. 80-100 ℃ washed often preclude the use of hot water to soften or dissolve the adhesive labels and the EVA adhesive base or other types of adhesives, in order to prevent re-adhesion of the adhesive off the PET flakes, the water required additives, e.g. alkali, emulsifiers or other special chemicals.
Usually the cleaning liquid is determined according to the plant source and the waste bottle formula composition adhesion property and its contents, the cleaning fluid may be filtered off and recycled after reheating impurities, in particular cleaning washing tank was equipped with a stirrer, to ensure the effect of cleaning, washing may preclude the two scrubbing process used.
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