The antibacterial technologies for finishing nonwoven materials vary greatly, and the application requirements are also completely different. Depending on the antibacterial technology, product end use and the action mechanism of the antibacterial agent, various application methods and steps can be selected, such as in polymer melts, Add antibacterial agents during fiber processing, or perform post-finishing on fabrics or products. After the polymer is fiber-formed, the antibacterial agent can be added to the stretching oil and spinning oil. It is important to pay attention to solving the problems of compatibility and uniformity of the antibacterial agent and oil and maintaining the performance of spinning finishing.
Antibacterial finishing can be carried out in every process after the stretching process. Antibacterial agents can be added in the curling process when there is a curling oil agent or no curling oil agent. The heat setting process is used to ensure that the antibacterial agent can be permanently bonded to the fiber surface. . When using AEM5700/5772 active silane antibacterial agent, an adhesion reaction needs to be carried out to improve the durability of the antibacterial effect. Some antibacterial agents that can react with or bond to fibers can be added to spunbond nonwoven products and bonded to the fiber web through spraying or padding. These operations can be done at the fiber production plant or during the pretreatment stage. This approach allows for antimicrobial treatment of fiber surfaces while also providing the required compatibility and safety during processing and final product. If antimicrobial agents are to be added to the surface of the final nonwoven substrate, this can be accomplished using spray technology and padding processes.
In addition, when adding antibacterial agents to polymer melts, some problems that arise when the polymer melts must be evaluated. For example, how to mix the antibacterial agent evenly into the polymer; processing at 230°C for 2 to 3 minutes will lead to possible volatilization of the antibacterial agent, changes in fiber properties, negative effects on color or reflectivity, filter clogging, and processed fibers. How to solve problems such as odor, atomization, powdering or surface salting out. In addition, it is also necessary to consider whether antibacterial agents will affect the health of workers and consumers on the production line and whether they will pollute the environment.
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