In the classical and traditional spinning mills, a close relation exists between the residual elongation of the yarn and the tenacity of the same, or rather how much force expressed in d/tex the yarn is able to absorb before it breaks.
The two variables are inversely proportional and are obtained by the elongation of the yarn during processing. The more the yarn is stretched, the higher the tenacity and low the elongation;
decreasing stretching increases elasticity and at the same time decreases tenacity.
Bibielle’s unique technology, that employs water cooling process, allows going beyond this concept universally known and typical of the typical BCF spinning mills through air cooling, since depending on water temperatures used during cooling post extrusion, different chemical mechanical characteristics are conferred to the yarns therefore arriving at the elongation process with products extremely elastic or extremely rigid. This means that during the elongation process, it is possible to obtain medium high tenacity values over 30 cNW/tex and, at the same time, not refrain from elongation values over 60/80%.
BCF yarn and fiber users are normally constrained to compromise, identifying tenacity/elongation values that are the most suitable for their applications. This choice, unfortunately, is bound to the close and constant correlation between the two elements. Should the users’ application require a different affinity between elongation and tenacity, Bibielle’s technology could prove to be decisive and innovative.
Fiber and Yarn