Enhanced fiber quality
By integrating TALI 400 S in a closed control loop, fully automatic dosing of chemicals is possible. The automatic dosing guarantees for constant spin bath concentration. Constant production conditions mean constant quality in terms of elongation, crimp etc.
The controlled spin bath concentration enables optimised consumption of chemicals and the associated cost savings.
The monitoring of concentration variations in the spin bath is based on the principle of acid-base titration. An alkaline solution is added to the acid solution by means of titration until the pH value rapidly changes from a low to a high pH value. The rapid change in pH value indicates that the equivalence point has been reached between the acid and the alkaline solution. This allows for calculation of the concentrations of H2SO4 and ZnSO4. An external density measurement system (optional) also allows for calculation of the Na2SO4 concentration.