In the natural material cycle and growth process, bacteria are extremely widespread, and fiber fabrics will inevitably have many bacteria attached to them. Their numbers vary from 103/cm2 to 108/cm2 depending on the environmental conditions and fiber types. According to statistics, there are about 10 to 50 million bacteria per gram of cotton fiber. If conditions are suitable, these bacteria will multiply rapidly. On dirty clothes that contain a lot of sweat stains, bacteria can grow more than 10 times after 24 hours. These bacteria can cause skin allergies at least, or endanger human health at worst. For this reason, human beings’ desire for health and comfort has been increasing, and antibacterial fabrics have rapidly developed as sanitary functional fabrics and health-care functional fabrics to meet the needs of society.
Antibacterial textiles can be obtained by performing antibacterial post-finishing on fabrics. The post-finishing generally uses a padding and drying process. Some antibacterial agents can also be bathed with dyeing to enhance the color fastness of the fabric. The most commonly used chitin antibacterial agent on the market is mainly used on cellulose fibers. Its active groups can form covalent bonds with the hydroxyl and amine groups on the cellulose fibers to firmly combine, and its antibacterial principle is It destroys the cell wall of bacteria. Since the intracellular osmotic pressure is 20 to 30 times the extracellular osmotic pressure, the cell membrane ruptures and the cytoplasm leaks out. This also terminates the metabolic process of microorganisms, making them unable to grow and reproduce. Silicone quaternary ammonium salt antibacterial agents are a type of antibacterial agent commonly used in polyester products. These products enter the pores of polyester fibers at high temperatures and are firmly attached to the inside of the fibers. They have good safety and can be efficiently removed. Bacteria, fungi and mold on fabrics, keeping fabrics clean and preventing bacterial regeneration and reproduction.
Antibacterial textiles are divided into dissolving type and non-dissolving type. The antibacterial agent on the dissolving type textiles is easy to precipitate in the aqueous solution, while the non-dissolving type is difficult to dissolve. Antibacterial fabrics are divided into ordinary antibacterial fabrics and high antibacterial fabrics according to their antibacterial efficacy. CAS115-2005 “Health Functional Textiles” jointly issued by the China Association for Standardization and the China Health Care Association provides evaluation indicators for antibacterial fabrics against different bacterial species.
CAS115-2005 “Health Functional Textiles” gives the antibacterial detection method for antibacterial fabrics. Based on the halo method, it is qualitatively determined whether the antibacterial material is a dissolution-type antibacterial fabric. In order to prevent the interference of residual floating chemicals during the processing of antibacterial fabrics, the fabric samples used for testing should be tested after one wash as required. Take 5 to 6 pieces of standard blank samples, antibacterial fabric samples or non-antibacterial fabric samples of the same type that have been washed once each according to the required specifications. There is a culture medium built into the petri dish. Place the sample flatly on the culture medium coated with bacterial liquid. Invert the petri dish and put it into an incubator for cultivation at a certain temperature and time according to different bacterial species. Measure the width of the inhibition zone to determine whether the sample is a dissolution-type antibacterial fabric. Carry out at least three parallel tests on the same sample and take the average. If the width of the inhibition zone D>1mm, it can be judged as a dissolving antibacterial fabric; if the width of the inhibition zone D≤1mm, it can be judged as a non-dissolving antibacterial fabric.
Extended reading: https: //www.yingjietex.com/product/Warp-knitted-sheared-terry-fabric.html
Extended reading:https://www.alltextile.cn/product/product-32-236.html
Extended reading: https://www.china-fire-retardant.com/post/9381.html
Extended reading: https://www.alltextile.cn/product/product-16-130.html
Extended reading:https://www.yingjietex.com/product/Double-Color-Twill-OXFORD-Fabric.html
Extended reading: https://www.alltextile.cn/product/product-99 -896.html
Extended reading: https://www.tpu-ptfe.com/ post/3320.html
Extended reading: https://www.alltextile.cn /product/product-8-274.html
Extended reading: https://www.yingjietex.com/product/Polyester-Dobby-OXFORD-Fabric-4.html
Extended reading: https://www.yingjietex.com/product/DOBBY-PONGEE-Breathable-Fabric.htm
