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Melt filtration of recycled PVC
Author(s) -
Boo H. Khim,
Mikofalvy Bela K.,
Summers James W.,
Sell W. Alan,
Mittendorf Don H.
Publication year - 1992
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730140306
Subject(s) - impurity , filtration (mathematics) , materials science , matrix (chemical analysis) , polymer , size exclusion chromatography , contamination , separation (statistics) , chromatography , chemical engineering , process engineering , composite material , chemistry , organic chemistry , computer science , mathematics , engineering , ecology , statistics , biology , enzyme , machine learning
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.