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Product Quality of Recycled Food Grade PET from a Bottle to Bottle Recycling Process
Author(s) -
Rieckmann Th.,
Völker S.
Publication year - 2001
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/1522-2640(200106)73:6<696::aid-cite6962222>3.0.co;2-t
Subject(s) - bottle , quality (philosophy) , product (mathematics) , citation , library science , engineering , computer science , mathematics , physics , mechanical engineering , geometry , quantum mechanics
Retaining food grade quality is essential for a bottle to bottle PET recycling process. A PET recycling process comprising reactive extrusion of bottle flakes under vacuum followed by solidstate polycondensation to again increase the viscosity to the required value of bottle blowing has been investigated in detail applying a comprehensive reaction model. Quality parameters like viscosity and content of carboxyl end groups and vinyl end groups (potential acetaldehyde) have been calculated for different process conditions. The recycling process is assessed under consideration of the requirements of the food packaging industry.