Importance

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Abstract

The invention relates to a process for simultaneous spin-drawing of one or more heavy-duty yarns, comprising the following steps: a) a polymer melt is fed to a spinning device; b) the melt is extruded through a spinneret with multiple extrusion orifices to produce filaments; c) the filaments are led through a blowing zone; d) the filaments are guided through a quenching cell; e) the filaments are tensioned between a feed roll and a first draw roll; f) the filaments are then drawn between the first draw roll and a second draw roll; g) the filaments are relaxed between the second draw roll and a relax roll; h) the filaments are taken up by a winder, a lubricant also being applied in a lubricating unit to the filaments during the process; and characterized in that polyamide yarns are produced, that drawing is carried out for in a substantially dry atmosphere, and that the arithmetic mean Ra of the surface roughness of the roll used as the first draw roll is at least 0.2 .mu.m.

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First Claim