TEST METHOD

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.

BENEFITS

• 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.
• Cost savings
  The controlled spin bath concentration enables optimised consumption of chemicals and the associated cost savings.
• Test method
  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.