Classification of Antibacterial Finishing Agents and Analysis of Antibacterial Techniques
Classification of Antibacterial Finishing Agents and Analysis of Antibacterial Techniques
Classification of Antibacterial Finishing Agents and Analysis of Antibacterial Techniques
Most of the antibacterial finishing agents for fabric printing and dyeing are organic antibacterial agents, and the organic antibacterial agents are classified into chemical synthetic antibacterial ingredients and natural antibacterial ingredients. The main antibacterial components of chemically synthesized antibacterial agents are organometallic compounds such as iodine complexes, alcohols, phenols, aldehydes, esters and ethers, imidazole and azole heterocyclic compounds, quaternary ammonium salts and biguanide organic nitrogenous compounds. Compounds, etc. The main antibacterial ingredients of natural antibacterial agents are mainly chitosan, cypress thiol, chitin hydrochloride, fennel oil and the like. In order to ensure the durability of the antibacterial effect of the antibacterial fabric (ie, the washing resistance), the antibacterial finishing agent for the finishing of the textile printing and dyeing can be classified into the following three types according to the combination with the woven fabric fiber, and has different dissolution characteristics.
1 direct adsorption type antibacterial agent
Relying on the direct affinity of the antibacterial agent to the fiber (intermolecular van der Waals force, hydrogen bonding, ionic bonding, etc.), the combination of the antimicrobial molecule and the fiber molecule is achieved. The antibacterial substances of such antibacterial agents are generally selected from existing medical antibacterial agents or disinfectants, and typical products are polyhexamethylene biguanide hydrogen chloride, hydroxychlorodiphenyl ether and some antibacterial finishing agents of natural antibacterial ingredients. Such products have a good direct affinity with the fiber molecules, and the antibacterial fabric causes the chemical bond to break and release the antibacterial agent through the process of washing, etc., so that the antibacterial agent content on the surface is maintained at a certain level. These products generally have poor washability and maximum dissolution. The halo method has a large inhibition zone (inhibition zone D>7 mm), which is mainly used to produce medical sterilization textiles with therapeutic effects.
2 cross-linking combined antibacterial agent
In order to improve the washing durability of the antibacterial fabric, a cross-linking resin (also referred to as a cross-linking agent) is mixed into the direct-adsorbing antibacterial agent, or a direct-adsorbing antibacterial agent and a cross-linked resin are used in combination at the time of use. On the one hand, these antibacterial agents can rely on the direct affinity of the antibacterial agent to bind to the fiber molecules, and on the other hand, by the bridging action of the crosslinked resin, the antibacterial substance, the crosslinking agent and the fiber molecule are combined by covalent bonds. . In order to overcome the problem of poor hand feeling caused by the crosslinked resin, some auxiliary softeners for improving the hand feeling are added. Antibacterial substances of such antibacterial agents are generally selected from existing medical antibacterial agents or disinfectants. The main research and development work of textile antibacterial agent manufacturers is to select cross-linking resin with good hand feeling and medical antibacterial agent or disinfectant and its suitable formula to meet the requirements of finishing process. Because the development of such antibacterial agents is relatively simple, new models and new products are constantly appearing. At present, most of the antibacterial finishing agents at home and abroad are of this type. These products have both direct affinity and covalent bond with fiber molecules, so washability is much better than direct adsorption. The antibacterial substance is released and released in a controlled manner, and the finished fabric can slowly release the antibacterial substance under a certain humidity at a rate sufficient to inhibit the growth of bacteria and fungi. However, since the antibacterial substance is not completely covalently bonded to the fiber molecule, the elution property is not too large when the amount of use is small, and although the safety requirement of the antibacterial textile dissolution product can be satisfied, the washing resistance is not too high; High washing resistance, the amount of use is large, and the increased cross-linking agent content causes poor hand feeling and moisture permeability, and the dissolution property is also large. Even if the washing is repeated many times, the detection by halo method is not small. Inhibition zone.
3 reaction-binding antibacterial agent
The antibacterial agent contains a large amount of reactive reactive groups and cationic antibacterial groups in the molecule. On the one hand, the active group of the antibacterial agent is covalently bonded to the fiber molecule containing active hydrogen, and on the other hand, the cationic antibacterial group is utilized. The mass forms a positive electric field on the surface of the fiber, producing an antibacterial effect. Since the antibacterial agent is all covalently bonded to the fiber molecules, the antibacterial substance is not eluted from the fiber molecules, so it is highly resistant to washing. The development of such antibacterial agents is difficult, and it is a non-dissolving antibacterial agent, which represents the frontier level and development direction of fabric antibacterial technology. At present, only a few products in the world have been put into use. The typical product abroad is the patented product DC-5700 of Dow Corning Corporation of the United States. The typical product in China is the patented product WS-8810 of Shenzhen Beiyue Haiwei Chemical Co., Ltd. These antibacterial agents combine with fibers through special cationic substances to form microbial barriers on the surface of the fabric to kill or inhibit the growth of bacteria and fungi by electric fields. Since the antibacterial substance is not eluted from the fiber molecules, almost no antibacterial ring (inhibition zone D≦1 mm) is detected by the halo method after washing once, and the hand feeling and moisture absorbing permeability are good, and it can adapt to the high-grade antibacterial textile. Claim.
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Embroidery is a general term for various decorative patterns embroidered on fabrics by needle and thread. Embroidery is divided into silk embroidery and feather embroidery. It is a kind of decorative fabric that uses a needle to puncture silk thread or other fibers and yarns with certain patterns and colors on the embroidered materials, and then forms the decorative pattern with the embroidery trace. It is the art of adding human design and production to any fabric that exists with needles and threads. Embroidery is one of the traditional Chinese folk crafts, which has a history of at least two or three thousand years in China. Chinese embroidery mainly includes Suzhou embroidery, Hunan embroidery, Shu embroidery and Guangdong embroidery. Embroidery techniques include: wrong needle embroidery, random needle embroidery, net embroidery, all over embroidery, lock silk, nasi, Najin, Pingjin, Yingjin, Panjin, fluting, scraping, poking, sprinkling, cross stitch, etc. the main uses of embroidery include life and art decoration, such as clothing, bedding, tablecloth, stage, art decoration.
