Cold Pad Batch Dosing Pump Ratio Calibration Procedures
Dosing pump ratio calibration in cold pad batch dyeing prevents reactive dye hydrolysis, shade tailing, and costly bulk fabric rejections.
Sodium Silicate Viscosity
Fluid Property
Flow resistance measurements define the internal friction of concentrated alkali solutions used as stabilizers in bleaching baths. High sodium silicate viscosity can hinder the uniform distribution of the bleaching agent across the fabric during cold pad-batch processing. This property decreases as the temperature of the liquid rises or the dilution increases.
Chemical Stability
Concentrated solutions of sodium silicate function as buffering agents that prevent the rapid decomposition of hydrogen peroxide. Managing the sodium silicate viscosity is necessary to ensure the chemical remains pumpable. This prevents catalytic fiber damage.
Application Efficiency
Squeeze rollers require a specific fluid thickness to distribute the chemicals evenly into the fabric structure without causing slippage. Incorrect sodium silicate viscosity causes the chemical mix to accumulate on the rollers or slide off the fabric before penetration occurs. This issue leads to patchy bleaching and uneven dye uptake.
Process Control
Automated viscosity sensors in the chemical kitchen monitor the thickener blend to maintain the required delivery rate to the pad mangle. This control of sodium silicate viscosity prevents the clogging of spray nozzles and pump lines during continuous runs. Regular cleaning schedules prevent the crystallization of silicate residues in the pipes, protecting the mechanical integrity of the dosing system.