Pretreatment for better dyeing
Uneven dyeing and different color results from batch to batch is expensive and time consuming to correct. Use enzymes for desizing, bioscouring, and bleach clean-up to pretreat the fabric for excellent dyeing results.
Efficient processing of fabrics requires the right preparation, including the removal of the size coating after weaving. Desizing with enzymes ensures complete removal of starch-based sizes which means excellent batch-to-batch dyeing reproducibility and evenness. As additional benefits, enzymatic desizing reduces the need for chemicals and water and the milder processing conditions allow the fabric to retain its strength.
Save even more time by removing size (desizing) and pectin (bioscouring) in one combined step.
BioscouringBioscouring is enzymatic removal of pectin and other impurities from raw cotton and is a gentle preparation for the subsequent wet processing stages. Bioscouring replaces the conventional high temperature alkaline scouring and either eliminates or reduces the need for adding softeners.
The weight loss is lowered with 1-2% due to the elimination of cotton damage and the cotton retains its structure which means higher fabric strength for longer-lasting cottons.
Textile mills can create knits with a superior hand feel and lasting softness. Furthermore, enzymatic scouring will require less water, as fewer rinses are needed, and there are significant reductions in COD, BOD and salt (acid and alkali) in the wastewater. Bioscouring will primarily work on medium to dark shades and can be combined with desizing and biopolishing.
Enzymatic bleach clean-up saves 1-3 baths of water and 20-30 minutes compared to conventional methods, such as using reducing agents or rinsing with vast amounts of water. This lowers the total cost of operation with savings in water, energy and time.
The bleach clean-up process can take place separately or together with biopolishing in the dye bath, making it ideal for the CombiPolish® process. Novozymes’ products are robust and work both at high pH and high temperatures.
Treat cotton as nature would
Clean water wanted
Enzymes, once they have done their job in the textile dye house or garment laundry, are broken down into harmless pieces of protein that do not harm the surrounding environment. That makes for clean waste water and cleaner, healthier rivers and streams.