Abstract
According to long-term observations, rewinding and slubbing operations have almost no effect on the unit strength of complex and slubbed polycaproamide fibres but affect the relative elongation at break. The stability of the deformation-strength properties of the fibres in time, assessed with the values of the coefficients of variation, during the manufacturing process, including slubbing, improves significantly. The fibre strength is not a function of fluctuations in the content of low-molecular-weight compounds in the initial polymer and its relative viscosity, spinning temperature, and elementary fibre thickness in the undrawn fibre in contrast to the moisture content of polymer going to spinning and the degree of orientational drawing of the fibre.
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