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AssigneeBarmag AG
InventorsHans-Gerhard Hutter, Klaus Schäfer, Dieter Wiemer, Hansjörg Meise, Detlev Schulz
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A method and an apparatus for melt spinning a multifilament yarn from a thermoplastic material, wherein a spinneret extrudes the thermoplastic material to strandlike filaments, which are initially in liquid form and then cooled to cause their solidification. For purposes of cooling, the filaments are precooled in a cooling zone downstream of the spinneret in such a manner that the filaments do not solidify. Subsequently, the filament bundle advances by the action of a coolant stream directed in the direction of the advancing yarn into a tension zone and undergoes further cooling until the filaments solidify in a solidification zone within the tension zone. To maintain the location of the solidification zone within the tension zone in a predetermined desired range thereof, an adjustable cooling of the filaments within the cooling zone is provided.
A process for melt spinning a multifilament yarn comprising the steps of
A melt spinning apparatus for producing a multifilament yarn, comprising
Dependencies are inferred from the claim text.