Filament Quenching and Cooling
topic
Molten filaments extruded from the spinneret are cooled by cross-flow or radial quench air at controlled temperature and velocity. Quenching rate determines the degree of molecular orientation and crystallinity frozen into the as-spun fibre. Uniform quenching across all filaments is critical for denier uniformity and dyeing evenness.
Role
Quenching is the critical transition from melt to solid state and largely determines the as-spun fibre structure. Non-uniform quenching causes denier variation and differential dye uptake, both of which propagate as defects in finished fabrics.
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