PET bottle recycling flake SSP

The advantage of direct solid-state treatment of PET bottle flakes is the faster IV increase rate when compared to pellets. This is due to the lower average thickness and therefore shorter diffusion distance (see parameters affecting SSP in Section 2.3 above). However, several aspects have to be considered, as follows  

If flakes are not acceptable, an intermediate repelletizing step will be necessary. 

There are several issues which have to be considered in this case, as follows  

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