Production of organic derivative of cellulose staple fibers by solvent dyeing, mechanical crimping, and cutting in that order

Claim 1

PROCESS FOR THE PRODUCTION OF DYED STAPLE FIBER MATERIALS, WHICH COMPRISES DYEING A TOW OF CONTINUOUS CELLULOSE ACETATE FILAMENTS WITH A DYEBATH COMPRISING AN AQUEOUS SOLUTION OF A LOWER ALIPHATIC ALCOHOL CONTAINING A DYESTUFF FOR SAID CELLULOSE ACETATE FILAMENTS AND A SALT OF THIOCYANIC ACID WHICH IS A SWELLING AGENT THEREFOR, WASHING THE DYED FILAMENTS DIRECTLY AFTER DYEING, APPLYING LUBRICATING AND ANTI-STATIC CONDITIONING AGENTS TO SAID DYED, CONTINUOUS FILAMENTS, DRYING THE TOW TO A MOISTURE CONTENT OF FROM ABOUT 20 TO 30% BY WEIGHT, IMPARTING A CRIMP TO THE DYED AND CONDITIONED FILAMENTS BY MECHANICALLY DEFORMING THE FILAMENTS UNDER PRESSURE, DRYING THE CRIMPED TOW TO A MOISTURE CONTENT OF ABOUT 6% BY WEIGHT, AND SEVERING THE CRIMPED, DYED CONTINUOUS FILAMENTS INTO STAPLE FIBER LENGTHS.