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How are antibacterial cloth masks made?

Thứ năm,23/04/2020

How are antibacterial cloth masks made?

Facing scarcity of medical masks due to the outbreak of the Covid virus19 According to experts, currently in the production and trade of textiles, antibacterial fabrics are widely used to produce underwear, sports goods, and household goods. and protective clothing in places where there is a high risk of infection such as hospitals, hotels, schools, clothes for doctors, health care workers and patients, and equipment such as wound dressings.

TS Nguyen Van Thong - former director of the Textile Institute - said that the most common method to get antibacterial textile products is to put antibacterial substances and keep them durable (or inside) textile materials during use. use. Antibacterial agents applied to fabrics are typically bactericidal or bacterial growth inhibitors. Currently, the substances used in the manufacture of antibacterial fabrics are primarily bactericidal.

Besides, we can put antibacterial substances into spinning solution to create fibers, synthetic and synthetic fibers with high antibacterial and antibacterial durability. Durable fibers with antimicrobial properties include fibers from bamboo vixco, crabyon fibers (containing chitosan), and chemical fiber products containing silver ions, some metal oxides with antibacterial properties. like zinc oxide in I-COOL crystal fiber (talent). The advantage of this method is that the antibacterial strength of the fabric is usually maintained during the fabric utilization rate. The limitation of this method is the longer production time, does not meet the immediate requirements of the market.

Previously and until now, in the world as well as in Vietnam, the introduction of antibacterial agents on fabrics was mainly done after bleaching, coloring or printing in different ways: infuse, coating or spraying ... Treated by this method, the finished fabric has the ability to kill up to 90% of bacteria after 1 hour of exposure and reduce to 60-70% after a number of washings (after 10 or 20 washings depending on the type antibacterial agent used). The advantage of this technology is that it can handle small, fast and flexible shipments in the production and supply of products to customers, in accordance with the requirements of timely provision of antibacterial fabrics for mask production. fabric.

The variety of antibacterial agents used to produce antibacterial fabrics in Vietnam is very diverse, including synthetic antibacterial agents and natural antibacterial agents. Most of the synthetic antibacterial agents used in textiles are bactericidal, have strong bactericidal activity, can be applied in different, effective methods on fibers and fibers.

The antibacterial agents used in manufacturing antibacterial fabrics in Vietnam include Silvadur 930 FLEX antimicrobial (Dow), Ruco-Bac AGL, Guc-BAC AGP (Rudolf group), Ablusil Q-Guard (Taiwan) surfactant), sanitized TH22-27 (Clariant), Agion® AM-B10G (Agion) and preparations from Chitosan. So how does the bactericidal ability of these fabrics? This question is also TS. Nguyen Van Thong said: There are currently two groups of test methods to assess the antibacterial ability of textiles: The qualitative methods include AATCC TM147 and AATCC TM30 (antifungal) (Association of Textile and Chemical Chemists color of textile materials), ISO / DIS 20645, EN ISO 20645 and ISO 11721 and SN195 920 (921 - antifungal) (Swiss standard); Quantitative methods include AATCC 100, ISO 20743, SN 195924, JIS L1902 and ASTM E 2149.

Also according to TS. Nguyen Van Thong, currently, quantitative methods are more widely used, although it is time-consuming and costly, because of counting the actual number of bacteria and determining the level of bactericidal / fungicidal activity. Quantitative methods may be used for all types of textiles and antimicrobials and comparisons between different antibacterial treatments as well as different levels of treatment on the same can be made. a kind of material.

, some companies have carried out the production of antibacterial cloth masks to supply and serve the needs of people.

The most recognized and widely used methods in international textile and apparel trade are AATCC 100, ISO 20743 and AATCC 147. In Vietnam, the Textile Testing Center of Textile and Garment Research Joint Stock Company is in Vietnam has the ability to test, antibacterial ability of fabrics according to internationally recognized and recognized standards.

In the current context, the quality of antibacterial fabric for mask production needs to meet regulatory certification requirements and be capable of bactericidal ≥ 90% of testing by standards.

Also in Vietnam, the research and application of antimicrobial treatment technology for fabrics has been interested by many units and individuals on different scales (laboratory and industrial scale). Antimicrobial fabric processing and manufacturing technology has been applied by many textile enterprises in the fabric production at the request of domestic and international customers. With the current equipment conditions, many businesses are eligible to deploy production of antibacterial fabric.

It is necessary to see the fact that antibacterial masks are not currently a major item in textile enterprises. Facing the increasing demand for disease prevention masks, with the combination of dyeing textile enterprises and textile enterprises, with the connection of State agencies and functional agencies, the production of masks from antibacterial fabric can completely meet the essential and practical needs of the people in time.

Earlier, at the January 31 afternoon press conference of the Ministry of Health, experts confirmed that people could use regular medical masks or cloth masks to prevent corona virus.

According to Assoc.Prof. Dr. Tran Dac Phu, former Director of the Preventive Medicine Department: wearing a mask has a very good effect of preventing respiratory diseases, reducing the risk of being affected by environmental pollution, dust, many diseases. The Ministry of Health also recommends that only patients who care for patients, health care workers treat directly, go into an outbreak to use N95 masks and specialized protective clothing. People can use cloth masks and have to wash them daily.

Facing the increasing demand for disease prevention masks, many textile enterprises have participated in the production of masks using antibacterial cloth.

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