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US 2004/0164437 A1Published application
Method for manufacturing a packaging web
AssigneeMotech GmbH Technology & Systems
InventorJurgen Morton-Finger
Life of this patent
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Abstract
A method for manufacturing a polyethylene terephthalate (PET) packaging web, wherein PET material is extruded using a twin-screw extruder and wherein the extruder interior space is degassed during the extrusion. The molten plastic is outputted in a strip shape from a spinning head located after the twin-screw extruder. The plastic strip is then cooled and stretched.
Claims13
A method of manufacturing a polyethylene terephthalate packaging web comprising the steps of:
- (a) subjecting a polyethylene terephthalate raw material to plastification in a twin-screw extruder and extruding a polyethylene terephthalate melt from said extruder;
- (b) degassing an interior of said extruder during the extrusion of the polyethylene terephthalate melt therefrom;
- (c) outputting a strip of said polyethylene terephthalate melt from a spinning head located downstream of said extruder;
- and
- (d) cooling and stretching said strip of said polyethylene terephthalate to form said polyethylene terephthalate packaging web.
2 more elements
Dependencies are inferred from the claim text.