Quantifying Radial Fixation Gradients in Ultra High Twist Viscose Ply Yarns under Dynamic Alkali Steaming
Dense viscose ply yarns require controlled swelling alkali blends to eliminate core fixation gradients during dynamic steam fixation.
Potassium Silicate Auxiliary
Alkaline Buffer
Soluble silicate salts are used in textile processing as processing aids during bleaching and dyeing stages. In high-temperature continuous bleaching, potassium silicate auxiliary functions as a buffering agent that regulates the pH of the bath. This action ensures that the chemical treatment remains uniform throughout the run.
Peroxide Stabilization
Hydrogen peroxide degrades rapidly under highly alkaline conditions unless a stabilizing agent is present to control the release of oxygen. Applying a potassium silicate auxiliary prevents this premature decomposition, allowing the bleaching agent to react evenly with natural impurities in cotton fibers. This stabilization step is essential for achieving a high and uniform white base before dyeing.
Without this chemical control, the cotton would suffer localized strength loss and uneven dyeing due to uncontrolled oxidation.
Precipitation Risk
Excessive silicate build-up can lead to hard deposits on processing machinery and fabric surfaces. When a potassium silicate auxiliary is used with hard water, insoluble calcium or magnesium silicates can form, which are difficult to remove. This risk requires mills to use sequestering agents to keep the bath clear.
Fabric Hand
Thorough rinsing of soluble silicates is necessary to prevent a harsh, stiff texture in the finished textile. Because potassium silicate auxiliary has high solubility compared to sodium-based alternatives, it is easier to rinse from the fabric, preserving the natural softness of the cotton. This choice reduces water consumption in the washing range.