METHOD AND APPARATUS FOR PRODUCING CRIMPED THERMOPLASTICS FILAMENTS

摘要

A method for producing a substantial helical or zig-zag crimp in a continuous filament (16) is described. The method comprises the steps of generating a turbulence in a thermoplastic material (12) intended to form the filament (16) whilst the thermoplastics material (12) is in its glass transition phase, and maintaining stresses induced in the formed filament (16) by said turbulence while the filament material passes into its crystallised phase.