Spin-texture process

Claim 1

A spin-draw process for producing fully drawn polyamide filaments, whereby spontaneous crimp is imparted to the filaments as they are being drawn, comprising: (a) extruding a fiber-forming polyamide through orifices of a spinneret at a given extrusion rate (E R ) to form filaments which cool as they move away from the spinneret, (b) passing said filaments over a quench roll before they are completely solidified but after they have cooled to a temperature below their stick temperature, wherein said roll (1) has a surface temperature (T R ) which is between 20° C. and 180° C. and lower than the average temperature at the center of said filaments, thereby cooling said filaments on one side, (2) is rotating at a peripheral speed (S 1 ) and (3) is positioned a a distance (d) below said spinneret, (c) drawing said filaments at a draw ratio (DR) between 1.5:1 and 6:1 as they leave said roll by withdrawing said filaments from said roll at a speed (S 2 ) which is at a speed sufficient to provide said draw ratio, and (d) collecting said filaments in the form of a yarn, said process being characterized in that (E R ), (d), (T R ) and (DR) are correlated to obtain filaments having sufficient spontaneous crimp to provide a yarn having at least 6.05% cold bulk.