Melt filtration of recycled PVC

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...

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Bibliographic Details
Published in:Journal of Vinyl Technology 1992-09, Vol.14 (3), p.140-144
Main Authors: Boo, H. Khim, Mikofalvy, Bela K., Summers, James W., Sell, W. Alan, Mittendorf, Don H.
Format: Article
Language:English
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Summary: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.
ISSN:0193-7197
1548-0585
DOI:10.1002/vnl.730140306