What are the factors that affect the effect of three-proof finishing agent?

1. The influence of the structure of three-proof finishing agent on water-proof and oil-proof finishing

The content of fluorine-containing monomer in the three-proof finishing agent emulsion is high, and its water and oil repellent properties are high. This is due to the fact that after finishing fabrics with fluororesin, the fluororesin accumulates into a more or less continuous film covering the fibers. Similar to other emulsions, its attachment to the fibers is achieved through mechanical or physical effects. The physical effect is the result of hydrogen bonds, van der Waals forces and hydrophobic bonds. Therefore, the fluorine-containing polymer chains are attached to the fiber, and the fluorocarbon chain side groups are arranged in an orderly or disorderly manner on the surface of the continuous film, indicating the existence of hydrogen bonds. Obviously affects the water repellent performance.

2. The influence of the dosage of three-proof finishing agent on the finishing effect

Under normal circumstances, the amount of three-proof finishing agent is directly proportional to the finishing effect. However, due to the inherent performance of the finishing agent itself, when the concentration exceeds a certain limit, the concentration has little effect on its performance.

3. The influence of PHvalue on finishing effect

The pH value of the three-proof finishing agent will affect the finishing effect. When it is alkaline, the post-finishing effect is greatly reduced. Under acidic conditions, the post-finishing effect does not change much, but too low a pH value also has a negative impact on the post-finishing effect. Comprehensive consideration, the pH value of the cloth surface should be controlled between 5 and 6. good.

4． The influence of baking temperature on the three-proof finishing effect

Increasing the baking temperature can improve the water and oil-proof finishing effect, but the effect is not obvious after exceeding 150°C, and too high a baking temperature will actually reduce the moisture resistance of the finishing. Comprehensive consideration, the baking temperature should be controlled at 160~180℃.

5． The influence of baking time on the three-proof finishing effect

Increasing the baking time can improve the water-proof and oil-proof finishing effect, but the effect is not obvious after more than 4 minutes, and too long time will increase the yellowing of the fabric. All things considered, it is better to control the baking time within 4 minutes.

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