I. Overview

In recent years, with the increase of consumers' self-health awareness, the antibacterial hygiene of textiles has received more and more attention. Major companies and research institutes have also developed some antibacterial hygiene finishing agents for textiles according to this situation. . Xi'an Kangwang Antibacterial Technology Co., Ltd. started early in the research and development of antibacterial materials. In recent years, it has cooperated with Xi'an Institute of Engineering and Technology (formerly Northwest Textile Institute of Technology) to apply its inorganic silver-loaded antibacterial materials. On textiles, staged results have recently been achieved, and products will soon be marketed for sale.

Second, textile antibacterial finishing agent classification and its performance

Antibacterial finishing agents used in textiles currently consist of two major categories. One is organic materials, such as low molecular quaternary ammonium salts, high molecular quaternary ammonium salts, organic silver, etc.; the second is inorganic materials, mainly inorganic silver compounds. These two types of antibacterial finishing agents have their own advantages and disadvantages in the application of textiles.

A) Organic antibacterial finishing agents Some products, such as polymeric antibacterial finishing agents with active genes, have a synergistic reaction with genes such as hydroxyl groups and amino groups on textile fibers. Therefore, the labor is good, the washing resistance is high, and it has no influence on the textile hand and other taking functions, but the disadvantage is that the broad spectrum of the antibacterial is not good. Low molecular quaternary ammonium is relatively disadvantageous.

B) Inorganic silver-loaded antibacterial finishing agent, when applied on textiles, has a broad spectrum of antibacterial properties. If the preparation of the finishing agent is good, the application process of the textile printing and dyeing factory is well controlled, and the washing resistance is also good. The disadvantage is that it will be textile. The feel has a certain influence.

Xi'an Kangwang Antibacterial Technology Co., Ltd. cooperated with Xi'an Institute of Engineering and Technology to develop an inorganic silver-loaded antibacterial finishing agent. It solves many problems and spreads the silver-loaded powder in response to the advantages and disadvantages of the current inorganic antibacterial finishing agent. The preparation of the solution, the color and feel of the fabric after finishing, and the washing resistance of the fabric after the finishing of the fabric have made breakthroughs, and entered the printing and dyeing factory application pilot test and the antibacterial finishing agent batch trial production stage.

Third, the textile antibacterial finishing agent mechanism

The antibacterial and antibacterial principle of the antibacterial finishing agent is that the cationic gene on the finishing agent attracts the negatively charged bacteria, thereby restricting the free activity of the bacteria, inhibiting the respiratory function and causing contact death; the second is the external force of the bacteria in the electric field. Under the action, the uneven distribution of negative charges on the cell wall and cell membrane causes deformation, resulting in physical rupture and bacterial dissolution.

There are two main channels for the application of antibacterial materials to textiles. One is to add antibacterial materials into the spinning dope of chemical fibers, so that the chemical fibers themselves have antibacterial properties. This method is simple, low in cost and good in antibacterial properties. The water washing performance is excellent. The disadvantage is that the mixing and mixing of the antibacterial material and the spinning dope on the spinning process is the key and difficult point of this technology. The second is to prepare the antibacterial material into the textile for printing and dyeing. Printing and dyeing auxiliaries, in the post-finishing process of printing and dyeing, by padding->drying->baking processing method, or by impregnation->dehydration->drying->baking processing method, The antibacterial material (molecular or crystal) is firmly bonded to the textile, so that the processed textile has high-efficiency, durable and washable antibacterial properties, and the textile has no color, color, change, feel, strength, etc. after the processing. Performance is also unaffected.

Fourth, antibacterial finishing textile safety performance and antibacterial performance testing

Because many antibacterial finishing garments are worn by consumers when they are dressed, the safety of antibacterial finishing is also a common concern of consumers and manufacturers. At present, most of the antibacterial finishing agents and antibacterial garments sold on the market have been tested and achieved safety. The finishing agent developed by Kangwang Company has been tested in terms of disinfection and irritation to human skin. It is completely non-toxic and has no sensitization to a skin. Therefore, it is very safe. The product.

At present, there is no uniform standard for the detection of antibacterial properties of textiles. The health and epidemic prevention stations in various provinces and municipalities have done a lot of work on the detection of antibacterial finishing properties of textiles, and have accumulated certain experience. However, no matter which method or method is adopted for the detection, the antibacterial textiles with antibacterial effect or good antibacterial effect are the same everywhere, and at present, a large number of antibacterial textiles are foreign trade products, which are exported to Japan, Southeast Asia, Europe and the United States. In China, the detection of high-efficiency and broad-spectrum antibacterial fabrics is also the same in foreign countries. Otherwise, it is impossible to export so many antibacterial textiles in China.

V. Introduction to Antibacterial Finishing Agent Performance of Wang Antibacterial Technology Co., Ltd.

Xi'an Kangwang Antibacterial Technology Co., Ltd. developed the antibacterial finishing agent for textiles, which is based on its mature industrialized production of inorganic silver-loaded powder, relying on Xi'an Institute of Engineering and Technology in textile printing and dyeing processing and textile dyeing auxiliaries. The talent and resource advantages are jointly developed. The product consists of two parts, one of which is a dispersion solution of inorganic silver-loaded powder; the other is an organic polymer binder solution. Since there is no affinity between the inorganic silver-loaded powder and the fiber, in order to make the silver-loaded powder of the finishing agent to the fabric have good water-washing performance, it is necessary to fix the silver-loaded powder by a process similar to the paint dyeing or paint printing of the printing and dyeing factory. On the fiber, to achieve a washable, durable antibacterial finishing effect. The product is easy to use and has no effect on other performances of textiles. It has good antibacterial effect after being tested by Shaanxi Provincial Health and Epidemic Prevention Station. The test data are as follows:

Test results for killing Staphylococcus aureus:

Number/item

Finishing dose (g/L)

24-hour kill rate against Staphylococcus aureus (%)

Test strain

ATCC6538

Remarks

HA-1

HA-2

HA-3

FA-1

FA-3

5

10

15

18

8

99.12

99.18

99.59

99.91

99.73

1.42*105cfu/piece

1.42*105cfu/piece

1.42*105cfu/piece

6.8*104cfu/piece

6.8*104cfu/piece

Adhesive 35g/L

Adhesive 35g/L

Note: HA is a binder mixed in the finishing agent, the content of the antibacterial agent in the finishing agent is 30%, FA is added when the binder is used, and the antibacterial agent is contained in the finishing agent 15%.

The results in the above table show that: in the use of the finishing agent, as long as it can ensure that the antibacterial agent content in the finishing liquid reaches 1% or more, the killing rate of more than 99% of the bacteria can be achieved.

The washability test is as follows:

The effect of different binder addition methods on washfastness:

Number/item

Number of washes

24-hour kill rate against Staphylococcus aureus (%)

Test strain

ATCC6538

FA-1-1

FA-1-2

FA-2-1

50 times

100 times

50 times

99.13

96.08

60.30

6.8*104cfu/piece

1.42s*104cfu/piece

The results of the above-mentioned washing durability showed that the adhesive was added during the finishing process, and the bonding fastness was high. After 50 washings, the sterilization rate only decreased by 0.78%, and still reached the killing rate of 99.13%, washing 100 times. It can still achieve a killing rate of more than 96%, and the mixing effect is poor in the finishing agent.

[China Antibacterial Fabric Network ]