Molding of stress-free polycarbonate articles

A stress-free, polycarbonate article, e.g. an extruded tube, is formed by maintaining the material during and immediately after moulding at a temperature between 70 DEG and 120 DEG C. and preferably 80 DEG to 100 DEG C. The article may subsequently be tempered at a temperature between 120 DEG and 14...

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Bibliographische Detailangaben
Hauptverfasser:	STREIB HUGO, HECHELHAMMER WILHELM
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A stress-free, polycarbonate article, e.g. an extruded tube, is formed by maintaining the material during and immediately after moulding at a temperature between 70 DEG and 120 DEG C. and preferably 80 DEG to 100 DEG C. The article may subsequently be tempered at a temperature between 120 DEG and 145 DEG C., e.g. 140 DEG C.