Fiber can adsorb many microorganisms, such as bacteria, viruses, etc. Most of these microorganisms will multiply very quickly at a suitable temperature, and cause various harm to humans. That is, the normal flora is a conditional pathogenic flora. When the body’s resistance decreases, the harmless normal flora may be transformed into a harmful pathogenic flora. Therefore, adding antibacterial agents to fibers has become a demand for people to pursue a high-quality life. The silver-loaded antibacterial polyester fiber and its textiles have good antibacterial properties against Escherichia coli, Staphylococcus aureus, Candida albicans, MRSA, etc. The antibacterial textile produced by the antibacterial fiber is an effective external barrier lower than that of pathogenic microorganisms invading the human body.
The preparation methods of nano-silver antibacterial textiles mainly include fiber modification method and fabric finishing method. The fiber modification method first adds a suitable antibacterial filler to the fiber-forming polymer, and then performs wet or melt spinning, and then processes it into an antibacterial fabric; the finishing of the fabric is by coating or impregnating an antibacterial agent on the surface of the fabric The way to form an antibacterial layer on the surface of the textile material. Each method has its own advantages and disadvantages, and corresponding processing methods can be used in production according to different needs. At present, the production of antibacterial textiles is mainly based on fiber modification. In this method, the ultrafine nano silver powder of antibacterial agent is used as an additive for spinning. At this time, the antibacterial agent enters the inside of the fiber, so the washing resistance is good and the antibacterial effect lasts for a long time. Experiments show that spherical nano-silver has a good antibacterial effect. The smaller the size of nano-silver particles, the antibacterial ability of the fabric will be improved. The antibacterial performance of nano silver antibacterial fiber remains unchanged after 50 standard washings. During the processing, the added antibacterial agent must have good compatibility and dispersibility with the fiber body. At the same time, the antibacterial agent particles are small and the particle size distribution range is narrow, which cannot affect the spinning; the addition of additives cannot affect the physical properties of the fiber. Performance, including fiber strength and elongation.
According to the antibacterial performance testing standards established by our country, the colony counting method is usually used for antibacterial testing of textiles. This is a quantitative antibacterial testing method. It can not only observe whether the textiles have antibacterial performance, but also obtain specific antibacterial rate values. At present, the antibacterial performance evaluation methods commonly used in the world include: minimum inhibitory concentration (dilute inorganic antibacterial agents into different concentrations for colonies to quantitatively determine the minimum inhibitory concentration of antibacterial agents against bacteria), minimum sterilization concentration (to determine The lowest concentration method to kill bacteria in a certain period of time), agar diffusion method (a qualitative or preliminary method to determine the antibacterial effect of antibacterial agents) and immersion culture method (a quantitative test of the antibacterial effect of antibacterial textiles) ).
Hongwu produces and supplies nano-silver particles and nano-silver dispersions, which can be customized according to customer requirements. Hongwu Nano has always adhered to market-oriented and technology-driven, and it is its responsibility to meet the reasonable demands of customers. Focus on the industry, deep cultivation and meticulous cultivation. Welcome to cooperate. https://www.hwnanomaterial.com.