1. The cause and treatment process of silicon spots
Adding some additives in the pretreatment and dyeing process of cotton knitted fabrics can remove impurities in the fibers and improve the brightness of cotton fabrics, but the hand feels hard after dyeing. In order to improve the hand feel and wearing performance of cotton knitted fabrics, in the last process After adding silicone softener, it is found that there are many small black spots on the surface of the fabric when the fabric is released, that is, silicon spots.
From the analysis of the molecular structure, the main component of the selected silicone softener is Si-0 and the structure CH3-0-SiC2H6-Si-(-0-SiC2H6-)n-SiC2H6-Xx is an alkyl group and the n is more than 100. Because the silicone softener molecule has a chain structure, the softener model is pumped into the machine after being stirred by a pump, and the softener circulates in the dyeing vat through the pump, breaking the chain structure of the softener molecule, resulting in silicone demulsification ( floating oil), sticking to the surface of the fabric, forming silicon spots.
Soaping and hot washing cannot be removed. After a long period of exploration, we finally use biological enzyme treatment to remove the silicon spots.

2. The principle of biological enzyme treatment
(Choose an appropriate amount of cellulase concentration, temperature, time, model,) Cellulase with bioactivation of biological enzymes, which can degrade the biodegradation, can make the 1.4 glucosidic bond in the cellulose fiber molecule It is hydrolyzed into soluble oligosaccharides or glucose in a short period of time. Due to the large molecular volume of biological enzymes, it is difficult to penetrate into the interior of the fiber, so the hydrolysis will only limit the surface of the fiber, weakening the bond between the small hairs on the surface of the fiber and the main fiber. The force, and then through the solution, the operation process in the machine is also the mechanical friction between the fabric and the fabric, and the fabric and the inner wall of the machine. These silicon spots and the small hairs on the surface of the fabric fall off together, and the silicon spots are removed after washing. In addition, the surface structure of the fabric is clearer, which also plays a role in finishing the fabric.

3. Enzyme treatment process
Technological process: the gray cloth enters the vat, hot washing, cold washing, pH adjustment, enzyme treatment, hot washing, dehydration, drying, cloth inspection, calendering
Dyeing and chemical additives and process prescription biological enzyme Xg/L, buffer lg/L, softener 3lg/L, PH:4.5-5.5 liquor ratio 1:8-12, enzyme treatment temperature 55-60°C, after 60 minutes Heat up to 80°C and keep warm for 15 minutes; soft; temperature: 40°C*20 minutes.