Melt filtration of recycled PVC

Autor:	W. Alan Sell, H. Khim Boo, James W. Summers, Don H. Mittendorf, Bela K. Mikofalvy
Rok vydání:	1992
Předmět:	Marketing chemistry.chemical_classification Materials science Chromatography Polymers and Plastics General Chemical Engineering General Engineering General Chemistry Polymer Contamination Pvc matrix law.invention Chemical engineering chemistry Impurity law Materials Chemistry Filtration
Zdroj:	Journal of Vinyl and Additive Technology. 14:140-144
ISSN:	1548-0585 0193-7197
DOI:	10.1002/vnl.730140306
Popis:	The separation of PVC from contaminants is one of the most important steps in recycling PVC. Earlier works have shown that one can separate PVC from other polymers by using the X-ray fluorescence technique. However, in many cases, even after careful separation, there is a remaining impurity level of about 0.1% due to the limitations of the separation processes. In many applications, impurities, particularly nonmeltables, cause defects in the PVC matrix and must be removed for best performance and appearance. Melt filtration appears to be the best technique to remove the nonmeltable impurities.
Databáze:	OpenAIRE
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