Size Box Chemistry and Viscosity Control
topic
Size box viscosity control maintains starch and PVA solutions within the 5 to 25 mPas range required for consistent pickup and penetration through temperature regulation at 85 to 95 degrees Celsius with continuous agitation preventing gelation and settling, with inline viscosity measurement using rotating viscometers triggering automatic water or concentrate addition to correct viscosity drift caused by evaporation during sizing production that progressively increases concentration and viscosity.
Role
Maintains the rheological consistency that determines size pickup and penetration uniformity across the sizing run and between beam changes, with viscosity drift during production causing systematic add-on variation along the warp length that produces shade variation after dyeing from different dye uptake at different size add-on levels, making viscosity control a critical quality management requirement for consistent sized warp quality throughout long production runs.
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