Chemical Binder
Chemical additives function to bind divalent metal ions in process water during the wet spinning and scouring of linen yarns. A chelating agent prevents these metallic contaminants from reacting with hydrogen peroxide, which would otherwise cause localized fibre damage and pinhole burns. Technicians record the dosage of this compound in the Scouring Log to verify bleach bath safety.
The binding activity protects the cellulose structure from metal-catalyzed oxidation.
Process Stabilization
Removing heavy metals from the process water ensures that bleaching agents target only the natural pigments rather than the cellulose polymer chain. Industrial linen spinners add the chelating agent directly to the water in the spinning trough where it softens pectin and allows the flax bundles to draft smoothly. This addition reduces the frequency of end-breaks during the drafting process.
Mills track water hardness and compound dosage on the Daily Water Quality Report to optimize the yarn surface quality. Without this treatment, trace minerals would build up on the spinning bobbins and cause abrasive wear on the yarn guides.
Dosage Adjustment
Varying the concentration of these stabilizers helps mills manage water supply variations without altering the machinery speed. When raw water holds high levels of iron, the required volume of chelating agent rises to prevent staining on the finished linen yarn. Failure to adjust this level leads to patchy dye absorption during subsequent finishing runs.
