Method for filtering substrate materials

Method for filtering substrate materials

A process for purifying polycarbonate is disclosed. The process entails filtering molten polycarbonate having weight average molecular weight of 14,000 to 30,000 g/mol through at least one non-woven metal structure having a thickness of 5 to 1mm, the structure including at least one dense layer, and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HAESE WILFRIED, RUYTINX BERT, MEYER ALEXANDER, NIETZWETZKI BERNHARD, MELLIS RAINER, KARBACH ALEXANDER, EBERT WOLFGANG
Format: Patent
Sprache:chi ; eng
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:A process for purifying polycarbonate is disclosed. The process entails filtering molten polycarbonate having weight average molecular weight of 14,000 to 30,000 g/mol through at least one non-woven metal structure having a thickness of 5 to 1mm, the structure including at least one dense layer, and at least one less dense layer wherein the dense layer is 0.05 to 0.2mm thick and has pore size of 1 to 10mu m to obtain pure polycarbonate.