Why Does Pre-treatment Require Desizing? 2024-02-05
Speaking of desizing, we have to mention the three major sizing materials in the textile sizing industry: starch and derivatives, polyvinyl alcohol (PVA), and acrylic sizing. PVA has been gradually phased out due to environmental issues, and most of them are now used in combination with starch and acrylic slurry. Four commonly used desizing methods: hot water desizing, alkali desizing, enzyme desizing, and oxidative desizing. Enzyme desizing and alkali desizing are currently used more frequently, and enzyme desizing (amylase) is mainly targeted at starch sizing. The desizing effect is generally evaluated by the desizing level. Among the three major slurries, acrylic slurry is easier to remove, while starch slurry and PVA both have simple and fast test methods (such as iodine/potassium iodide method.) Insufficient desizing will affect the coloring rate of the dye during dyeing, or cause the fabric's feel to deteriorate.
Read More