Melt spinning of polypropylene

Polypropylene, a major proportion of which is in isotactic form, is compressed, melted, heated to 90-140 DEG C. above its melting-point, which is of the order of 160-170 DEG C., and spun into filaments, preferably by use of a screw extruder and an associated spinneret. Up to 25 per cent by weight of...

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Bibliographische Detailangaben
1. Verfasser:	ROBERTS JOHN FRANCIS LLOYD
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES
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Beschreibung
Zusammenfassung:	Polypropylene, a major proportion of which is in isotactic form, is compressed, melted, heated to 90-140 DEG C. above its melting-point, which is of the order of 160-170 DEG C., and spun into filaments, preferably by use of a screw extruder and an associated spinneret. Up to 25 per cent by weight of the polypropylene may be in atactic form. Examples are given.