Introduction to fabric antibacterial agent knowledge
With the improvement of living standards, consumers’ requirements for fabrics are no longer limited to color and style. Various functional finishing effects have become available to meet consumer needs. Among all kinds of functional finishing, antibacterial finishing always attracts the attention of all parties.
Antibacterial fabrics have the effect of inhibiting the growth of microorganisms. Consumers can enjoy the benefits of hygiene, deodorization, and even medical health care. In view of the fact that antibacterial fabrics have a killing or inhibiting effect on microorganisms, countries have great considerations about their biological safety. They usually require the antibacterial agents used to be evaluated and registered (including antibacterial performance and safety) before sale. This is also antibacterial. The difference between finishing and finishing with other functions.
Common antibacterial finishing methods include: antibacterial fiber, antibacterial post-finishing, etc.
Antibacterial fiber is usually obtained by adding antibacterial ingredients to the spinning solution, so it has the advantages of broad-spectrum antibacterial and long-lasting antibacterial effects. The disadvantage is that it cannot be used on popular natural fibers. Moreover, the production cycle is long and the consumption of bacteriostatic agents is large.
Antibacterial post-finishing uses antibacterial agents during printing and dyeing, so it has a wide range of applications, a short cycle, and a flexible process. With the birth of new antibacterial agents, the antibacterial effect has also been greatly improved in washability and occupies a larger area. market share.
Commonly used bacteriostatic agents include:
ØTrichlorazine phenols; can change the permeability of bacterial cell membranes and inhibit bacterial growth. Representative products such as Huntsman’s INVASAN® AM110new for fabric dyeing have good antibacterial effects and excellent washability on polyester and nylon. As a dissolving bacteriostatic agent, it has little irritation to the skin and is safe and reliable. Disadvantages: It has poor high temperature tolerance and is not accepted by the Japanese market. Therefore, it is mainly used for export orders to Europe and the United States.
ØQuaternary ammonium salts and organosilicon quaternary ammonium salts: Their molecules are cationic and can combine with anionic microorganisms to inhibit their growth. The disadvantage is that the antibacterial effect is easily affected by the environment. In particular, anionic substances such as cleaning agents can neutralize their cationic properties and cause them to lose their antibacterial effect.
ØBiguanides: can act on the cell membrane of bacteria and change their surface properties to achieve antibacterial effects. The disadvantage is that it lacks washability.
ØInorganic bacteriostatic agents: Copper, silver, and zinc ions have bacteriostatic effects. This characteristic has long been recognized and utilized by humans. Early antibacterial finishing agents used more copper ions. Due to restrictions on the color finish of fabrics and environmental protection, they are rarely used on fabrics.
Silver ion bacteriostatic agent achieves bacteriostatic effect through three ways:
·Can react with the sulfhydryl groups of proteins in bacterial cells to make them lose biological activity
·Interfere with bacterial DNA replication and synthesis
·Change the properties of bacterial cell membranes
Because silver ions have multiple mechanisms of action, they show good inhibitory effects on various bacteria, and are still effective even against drug-resistant bacteria.
Representative products include SilpureFBR-5 silver ion bacteriostatic agent from Canada’s Thomson Research Associates (TRA). In March 2007, Huntsman Fabric Dyeing and TRA reached an agreement to promote silver ion antibacterial technology on a wide scale. TRA is a company specializing in the research, development and application of antibacterial technology. According to the agreement, it is mainly responsible for the development and technical support of antibacterial technology, the testing and evaluation of antibacterial effects, the marketing of silver ion antibacterial, and Huntsman fabric dyeing. With its extensive branches, Chemical is responsible for product supply and technical support to finishing yards. This powerful alliance brings a new generation of silver ion antibacterial products to the fabric antibacterial market:
SilpureFBR-5
SilpureFBR-5 is registered in major countries such as Europe, the United States, and Japan, and antibacterial fabrics treated with it can be sold with confidence. Compared with traditional silver ion products, SilpureFBR-5 has the characteristics of fine particles, uniform distribution, and good washing resistance. At the same time, the dosage is low. At the recommended dosage, there will be no discoloration of the fabric after finishing, and it can finish white and light-colored fabrics.
SilpureFBR-5 is suitable for various fiber materials (except wool fibers). The process is simple and only requires rolling-baking-baking. It can also be used for finishing garments by dipping or spraying.
SilpureFBR-5 is packaged and sold in two parts. PartA and PartB are pre-mixed in a ratio of 8:92 and then prepared into a finishing fluid of required concentration.
Process example:
Cotton knitted fabric
SilpureFBR-5 (mixed liquid) 20g/l
The liquid carrying rate is 75%,
Drying
Bake at 150 degrees for 1.5 minutes
The processed samples were washed at 40 degrees for 30 times and then tested according to JISL1902. The survival rate tested with K. pneumoniae was less than 0.01%, which fully meets the requirements of antibacterial and anti-odor.
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