Infant textiles are no longer limited to practicality. New textiles that combine comfort, beauty and functionality are gaining more and more attention. For babies, due to their poor resistance, the health of the body is more susceptible to the bacteria in the surrounding environment, and the residual stains on the baby’s clothing and the oil secreted by the skin provide a good living environment for the bacteria, while the skin of the infant is delicate. Chemicals left in clothes such as detergents can affect them, so they cannot be cleaned with too much detergent, so it is very meaningful to develop baby textiles with antifouling, decontaminating and antibacterial functions. Most of the baby clothes are fabrics that are breathable and comfortable to wear, such as cotton fabrics. Therefore, it is decided to use cotton fabrics as experimental objects for multi-functional finishing.
This subject mainly studies the anti-fouling, easy decontamination, antibacterial and multi-functional “one-bath method” finishing process of cotton fabrics, and optimizes the process conditions. The main process flow is: padding – pre-baking – baking.
In the antifouling and decontamination single-function functional finishing, the pH value of the finishing liquid has the greatest influence on the antifouling and decontamination function of the cotton fabric after finishing, followed by the concentration of the finishing agent and the rolling rate. Anti-fouling and easy-to-decontamination finishing agent should be added with cross-linking agent. With the increasing amount of cross-linking agent, the anti-fouling effect of cotton fabric after finishing is better, but its easy decontamination effect increases first and then decreases. It is because the excess cross-linking agent forms a film on the surface of the cotton fabric through self-crosslinking reaction, which affects the effect of easy decontamination finishing, and the excessive amount of the cross-linking agent makes the fabric feel harder, and the wearing performance of the fabric is deteriorated. Consider the amount of crosslinking agent is 10g / L. The antibacterial agent itself does not chemically react with the crosslinker, but the addition of the crosslinker reduces the binding of the antibacterial agent to the cotton fiber.According to the results of the single-function finishing experiment, when the pH of the finishing liquid is 6, and the rolling rate is 80%, the antifouling, easy decontamination and antibacterial effects of the finished fabric are good, which provides a good experimental basis for the “one-bath method” finishing.
In the anti-fouling and anti-fouling multi-functional “one-bath method” finishing, as the concentration of the antibacterial agent is continuously improved, the antifouling and easy decontamination performance of the fabric is gradually reduced; the concentration of the antifouling and decontaminating finishing agent is gradually increased. However, there is almost no change in the bacteriostasis rate of the fabric, which indicates that the antifouling and decontaminating finishing agent has almost no effect on the antibacterial agent. The antibacterial agent belongs to the quaternary ammonium salt type cationic compound, and the cotton fiber exhibits an anionic property in water, and is easily combined with the cotton fiber due to the influence of the interionic force between the cationic antibacterial agent and the cellulose anion.
Reasonable pre-baking temperature and time have certain influence on the finishing effect. When the pre-baking temperature is higher than 100 ℃, the evaporation rate of water is too fast, which may cause the finishing agent inside the fabric to move to the surface of the fabric too quickly as the water evaporates. The pH enomenon of migration shift occurs, which affects the finishing effect. Therefore, after the pre-baking temperature is higher than 100 ℃, the finishing effects will begin to decrease. The effect of pre-baking time on the properties of the finished fabric is similar to the pre-baking temperature. The optimum pre-baking time should be controlled at about 90 s. Increasing the baking temperature can promote the bonding between the finishing agent molecules and the cellulose molecules, but when the baking temperature exceeds 170 ℃, the anti-fouling and decontamination of the finished fabric after the finishing, the antibacterial effect is drastically decreased, and the fabric has yellowing pH enomenon. When the baking time is 60 s, the finishing agent adsorbed inside the fabric is not easy to diffuse in the fiber due to the short baking time. When the baking time reaches 90 s, the finishing effect of the fabric is optimal, and the baking time is too long. Will damage the fiber structure, may cause yellowing of the fabric. The analysis shows that the pre-baking temperature is 90 ℃, the pre-baking time is 90 s, the baking temperature is 160 ℃, and the baking time is 90 s, the fabric will get the best finishing effect.
