Silica sol for fiber dyeing and finishing

#Application ·2025-08-21 16:47:29

Characteristics

• Small particle size and uniform distribution: The particle size is usually between 5 and 100 nanometers, with good dispersibility, which can form a uniform coating and improve the performance of textiles.
• High stability: It features a high degree of coalescence stability and dynamic stability, maintaining performance under a wide range of temperature and humidity conditions, preventing sedimentation and stratification of the slurry during storage, and ensuring the stability of the textile production process and product quality.
• Strong surface activity: The particle surface is rich in hydroxyl groups (-OH), which can adsorb dye molecules through hydrogen bonds, van der Waals forces and other actions. It can also form hydrogen bonds or undergo chemical reactions with the hydroxyl groups on cellulose fibers, thereby enhancing the dye fixation rate.
• Moderate viscosity: The moderate viscosity of silica sol enables the paste to have good fluidity on textiles, allowing it to evenly penetrate into the fiber gaps of the textiles and fill the voids between the fibers, making the textiles tighter and smoother.
• Good environmental friendliness: Silica sol is a water-based additive, free of harmful chemicals, non-toxic and harmless. It will not release any harmful substances during use, meeting modern environmental protection requirements.

Function

• Enhance dyeing performance: Its high specific surface area and pore structure enable dyes to adhere more evenly to the fiber surface, improving color fastness and uniformity, reducing dye loss, and enhancing the dyeing effect. For instance, in the dyeing of cotton fibers, after adding silica sol, the color fastness of dyed cotton fabrics can be increased by 15% to 25%.
• Improving fabric hand feel: As a softening finishing agent, it can form a uniform and fine silicone gel film on the surface of textiles, increase the softness of textiles, and improve hand feel.
• Enhance the physical properties of fabrics: It can enhance the strength and durability of textiles. By forming a uniform coating, it increases the bonding force between textile fibers and improves the fabric's tear resistance and wear resistance. At the same time, it can also enhance the water resistance and stain resistance of fabrics, making textiles easier to clean and maintain.
• Endowed with special functions: Silica sol has excellent electrical insulation properties and can effectively reduce the generation of static electricity in textiles. In addition, matting treatment can be carried out on chemical fibers to achieve a matting effect, which can also improve the anti-wrinkle, antibacterial and flame-retardant properties of the fibers.

Application process

• Padding method: By immersing the gauze in a solution containing silica sol, it ensures a uniform coating on the fiber surface, which is suitable for the treatment of various fabrics.
• Coating method: Silica sol is applied to the fabric surface through a coating machine, which is suitable for large-scale production and can precisely control the thickness of the coating.
• Spray method: Suitable for small-batch or sample production, it can precisely control the thickness of the coating and is flexible to operate.