1. How to deal with silicon spots appearing on the surface of fabric after styling?
For silicon spots on polyester fabrics, you can use degreasers and soda ash to remove them (use degreasers and treat them under alkaline conditions of 80-90°C), or use silicone remover and soda ash.
For pure cotton and polyester-cotton fabrics, generally after the silicon spots on the fabric are removed, the color of the fabric becomes lighter and the fabric needs to be counter-dyed.

2. When amino silicone oil emulsion is used together with color fixing agent, soft oil, etc., silicone spots sometimes occur, but not when used alone. Why?
Amino silicone oil is incompatible with color fixing agents, soft oils and other additives, causing the silicone oil to float.
Amino silicone oil emulsion is a cationic surfactant (or weak cation), and many chemicals used in the dyeing process are anionic surfactants, such as: dyes (some dyes are anionic), leveling agents, spreading agents, color fixing agents Agent... Once these chemicals are not washed thoroughly after dyeing and finishing and before softening, when the cationic amino silicone oil series softener reacts with the anionic substances in the dye bath, the amino silicone oil cationic emulsion will break emulsification and bleach the oil. When soft spots (silicone spots) occur, the effective method is to strengthen sufficient washing before softening and finishing. It is best not to perform softening and finishing in the same dyeing machine. After dyeing and washing, the fabric is poured out and softened in a padding car (special softening tank). It can effectively avoid or reduce the formation of soft spots (silicone spots).

3. How to deal with silicon plaque in woolen sweaters?
Under normal circumstances, manufacturers of silicone oil and softeners will develop matching silicone stripping agents to facilitate the treatment of sticky or silicone spots during operation. However, most of them cannot completely solve the problem and can only alleviate it.
First, you can use a special desilicone oil additive, and also test it with a small sample first before putting it into mass production;
Second, manual repair using organic solvents or high-strength cleaning agents with a high-pressure spray gun has certain applicability.
After processing, there will still be slight traces on the problem parts. However, use Jiebao additives to clean. After cleaning, the fabric will smell. It needs to be dried with cold air when it is 80% dry. The whole process must be done with gloves. .

4. How to remove silicone softener from finished knitted fabrics?
Silicone softeners can give knitted fabrics a soft, smooth, plump and elastic feel, as well as anti-wrinkle, wear-resistant, washable, and good sewing properties. This greatly increases the added value of the product and is therefore favored by customers.
Silicone softeners are chemically stable and have a non-water-soluble macromolecular structure. They have strong ability to adsorb to the fiber surface, and some active groups form chemical bonds or self-crosslink with the fiber, forming an elastic network structure with a high degree of polymerization on the fiber surface. Therefore, it is difficult to remove silicone softener from finished knitted fabrics by ordinary methods.
Knitted fabrics have a higher rate of re-dying and re-repairing. If the silicone softener on the fabric is not removed before re-dying or re-repairing the fabric, the fabric will not be colored at all. If the removal is not clean, it will cause obvious color stains. Only Only the silicone softener on the reworked fabric can be re-dyed and repaired.

After repeated trials and large-scale production promotion and application, a method has been found that can effectively remove silicone softeners on finished knitted fabrics.
(1) The polyester fiber molecules on the all-polyester knitted fabric do not have polar groups such as hydroxyl groups. Using strong alkaline caustic soda combined with silicone removal spirit can achieve level 4 removal of silicone softener on the cloth surface, and the fabric can be counter-dyed and recycled. Colorful flowers will not appear as a result of cultivation.
(2) Cotton knitted fabrics have a large number of hydroxyl groups on the cotton fiber molecules. Only by using 27.5% hydrogen peroxide, combined with akesan and caustic soda, can the chemical bonds or self-crosslinking between amino silicon and fibers be destroyed to fully emulsify and encapsulate the silicone. Softener effect.
(3) Polyester/cotton blended knitted fabric contains both polyester and cotton fiber molecules, which can be removed using Akesan AD combined with silicone removal spirit.

 5. How to use biological enzymes to remove silicone spots on cotton knitted raw materials?
1) Causes and treatment techniques of silicon plaque
Adding some additives to cotton knitted fabrics during the pre-treatment and dyeing process can remove impurities in the fibers and improve the brightness of the cotton fabrics. However, after dyeing, the hand feels hard. In order to improve the hand feel and wearing performance of cotton knitted fabrics, in the last process After adding silicone softener, it was found that there were many small black spots on the surface of the fabric, which are silicon spots.
From the molecular structure analysis, 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 n is more than 100. Because the silicone softener molecules have a chain structure, the softener-added model is stirred by a pump and then pumped into the machine. The softener circulates in the dye vat through the pump, breaking the chain structure of the softener molecules, causing the silicone to break ( bleach), stick to the surface of the fabric, forming silicon spots. Soaping and hot washing cannot remove it. After a long period of exploration, we finally chose biological enzyme treatment to remove silicon plaque.
2) Principle of biological enzyme treatment
(Choose the appropriate cellulase concentration, temperature, time, and machine model) Utilize biological enzymes with bioactivating cellulase. Its biodegradation effect can make a 1.4-glucoside bond in the cellulose fiber molecules It is hydrolyzed into soluble oligosaccharides or glucose in a short time. Since the molecular size of biological enzymes is large and difficult to penetrate into the fiber, hydrolysis will only limit the fiber surface and weaken the binding force between the small hairs on the fiber surface and the main fiber. , and then through the solution and the operation process of the machine, which 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 with water. In addition, the surface structure of the fabric is clearer, which also plays a role in smoothing and finishing the fabric.
3) Enzyme treatment process
Process flow: gray cloth enters the cylinder, hot washes, cold washes, pH adjustment, enzyme treatment, hot washes, dehydration, drying, cloth inspection, and calendering.