Cellulase is commonly known as hair lotion, enzyme water, and the like. It acts on cellulose fibers, which can cause hydrolysis and release the fluff on the surface of the fiber under the action of mechanical external force. The enzyme has a high degree of specificity and high efficiency, and its catalytic effect is generally many times higher than that of the inorganic catalyst.
The catalytic reaction conditions of cellulase are mild, and can be carried out smoothly at normal temperature. It can save a lot of energy, reduce production costs and reduce environmental pollution. The polished fabric has clear grain texture, smooth surface, soft hand feeling, smooth and delicate, which improves the product grade and increases the added value of the product. Since the enzyme is completely biodegradable, it is a green product and has been widely used in the textile industry in recent years.
Biopolishing is generally carried out after the knit fabric is boiled and dyed. Pectin, waxy substances, nitrogenous substances, minerals contained in cotton fabrics and oil stains adhered during spinning and weaving directly affect the polishing performance of cellulase. Therefore, these impurities are first removed before the biological enzyme is polished. In the factory production, the boiling and one bath method is often used for pre-treatment, which can save a lot of steam, water, electricity and labor than the first cooking and bleaching process, improve production efficiency, reduce unit energy consumption, and reduce waste water pollution.
1. After the knitted fabric is boiled and rinsed, it must be rinsed clean. Otherwise, the local pH value of the fabric is too high, and the surface fluff is easily removed.
2. When using cellulase polishing, no surfactant may be present in the dyeing tank. Because the surfactant can bind to the enzyme, the structure of the enzyme changes, thereby affecting the activity.
3. According to the type of knitted fabrics and equipment used, develop a reasonable production process. The temperature is preferably controlled at 50 ° C and the pH is controlled at about 4.8. The amount of cellulase and the operating time are based on the thickness of the fabric and the operating speed of the equipment.
4. After the polishing treatment, if it is not dyed immediately, it must be deactivated to avoid damage to the fabric.