PET bottle recycling: Difference between revisions
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Contaminant removal in this step consists of several processes in which POSTC-PET bottles are sorted, ground and washed. PET bottles are separated from PVC, polyethylene and other plastic containers. PVC can be removed manually from PET bottle scrap before the grinding process. While no 100% separation of PVC is reported yet, efficient separation of PVC from mixed PVC/PET bottles scrap can be achieved using methods based on the difference between the physical or chemical properties of PVC and PET. After sorting, post-consumer PEt is ground into flakes. PET flakes are washed following grinding. | Contaminant removal in this step consists of several processes in which POSTC-PET bottles are sorted, ground and washed. PET bottles are separated from PVC, polyethylene and other plastic containers. PVC can be removed manually from PET bottle scrap before the grinding process. While no 100% separation of PVC is reported yet, efficient separation of PVC from mixed PVC/PET bottles scrap can be achieved using methods based on the difference between the physical or chemical properties of PVC and PET. After sorting, post-consumer PEt is ground into flakes. PET flakes are washed following grinding. | ||
==== Drying ==== | ==== Drying ==== | ||
Drying | Drying minimizes the moisture content of the PET flakes. Drying reduces the hydrolytic degradation | ||
effect and leads to higher R-PET melt strength. | effect and leads to higher R-PET melt strength. | ||
=== Bottle-to-bottle-recycling === | === Bottle-to-bottle-recycling === | ||