Antibacterial agents refer to chemical substances that can keep the growth or reproduction of certain microorganisms (yeast, bacteria, fungi, algae and viruses, etc.) below the necessary level for a certain period of time. At present, the common antibacterial agents on the market are: inorganic antibacterial agents, organic antibacterial agents, macromolecular antibacterial agents and natural antibacterial agents. A detailed analysis of these four categories!

1. Organic antibacterial agent

At present, the organic antibacterial agents on the foreign market are mostly organic nitrogen-containing ionic compounds, which are similar in structure to antistatic agents, such as organic iodides, organic chlorides or their complexes, and amino acid metal salts.

2. Inorganic antibacterial agent

Inorganic antibacterial agents are formed by ion exchange, adsorption, alloying or compounding by using antibacterial metals loaded on a certain carrier. At present, titanium-based antibacterial agents and silver-based antibacterial agents are more commonly used. Titanium-based antibacterial agents are mainly based on materials such as TiO2 that can be activated by photocatalysis; silver-based antibacterial agents are currently the most widely used in China. Variety.

3. Polymer antibacterial agent

Antibacterial polymer materials are obtained by introducing antibacterial functional groups. According to different functional groups, they can be divided into quaternary ammonium salt type, quaternary phosphonium salt type, guanidine salt type, pyridine type and organometallic copolymer. It can be introduced by homopolymerization or copolymerization, and can also be introduced by means of grafting.

4. Natural antibacterial agent

Natural antibacterial agents are extracted and refined from animals and plants. At present, the key development is ultra-fine chitosan powder, chitin and so on.

5. Graphene is antibacterial

Graphene antibacterial is pioneered by Hefei Microcrystalline Materials Technology. Graphene antibacterial is treated with high-tech nanotechnology, making it have a wider and more efficient antibacterial and sterilizing function, and through the slow release effect, it improves the long-term antibacterial effect.

1. Application of antibacterial agents in coatings

 In the decoration materials of living environment, wall coating plays a vital role. In the past, antibacterial coatings were mainly used in special places such as hospitals, which could reduce the spread of germs; now the coatings industry has begun to develop in the direction of environmental protection, non-toxicity and health. Healthy living support.

Although most coatings have antibacterial factors such as antibacterial preservatives and carbon dioxide added, these factors can really inhibit bacteria and sterilize in a very short period of time. In addition, the pigments, fillers, additives, water and oil in the coatings are excellent for microorganisms. It is necessary to add antibacterial agents in order to be truly long-lasting antibacterial.

According to the feedback of market application verification, adding inorganic antibacterial agents is more long-lasting and safer. The proportion added in the actual finished product is controlled within the standard range, and will not cause any harm to the health of the human body or even pets.

The antibacterial agent-added coating can inhibit Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis, Staphylococcus aureus, Streptococcus nitric acid, Aspergillus versicolor, Cladosporium, Aureobasidium pullulans, Paecilomyces varostii, Alternaria, Aspergillus flavus, Aspergillus niger, Cladosporium and other pathogens; now the country has formulated relevant testing standards to regulate the market:

HG/T 3950-2007 Antibacterial coating

GB/T 21866-2008 Antibacterial coating (paint film) antibacterial determination method and antibacterial effect

GB 18581-2001 Limits of harmful substances in solvent-based wood coatings

GB 18582-2008 Indoor decoration materials Limit of harmful substances in interior wall coatings

2. Application of antimicrobial agents in textiles

How to deal with the bacteria on the bedding? Bedding has a very close contact with the human body, especially pillows, which have a great impact not only on the skin of the face, but also on breathing, so bedding must pay attention to hygiene. If the bedding has been antibacterial treatment, it will prevent the growth of many bacteria.

In order to achieve the best effect, before doing antibacterial treatment, the raw materials to be treated should preferably have a clean surface, no easy-to-fall substances, no other dirt, and the fiber loss rate of the fabric must be less than or equal to 1.5%. It is recommended to pass the AATCC97 test.

Processing steps

① Immerse the fabric in the working fluid;

②Press and roll off excess working fluid, or use dehydration;

③Drying (temperature 100℃-150℃, time about 55s, the specific temperature and time are determined by the product and process flow).

spray:

 ①The antibacterial agent is added to the water according to the proportion of 10%;

 ②Spray wet the fabric that needs antibacterial processing, and then dry it at 100-150℃.

 When fabrics are subjected to antibacterial processing and finishing, it is calculated according to the concentration of chemicals absorbed by the fabrics. The proportion of absorbed medicine reaches 2%-3% of the cloth weight.

 For example: the concentration of the chemical in the water = 5%÷80%, the result is 6.25%, which should be slightly larger than this concentration.

3. Application of antibacterial agents in bathroom products

According to statistics, an adult uses the bathroom up to 2,500 times in a year. And this humid space is very conducive to the breeding and reproduction of germs, and various pathogenic microorganisms are flying when flushing the toilet. Therefore, the bathroom has become the key antibacterial place in home life.

Pathogenic microorganisms are spread by water, air, and surface contact. A study on microbial contamination on the surface of household daily objects showed that the total number of bacteria on the surface of household daily objects exceeded 1000cful/cm2 in 22.8%, among which toothbrushes were the most seriously polluted, followed by bathtubs, with a polluted rate of 50.5% and 33.3% respectively.

The pathogenic microorganisms covering the surface of sanitary ware include Streptococcus, Enterobacteriaceae, Helicobacter, Mycobacterium tuberculosis, Staphylococcus, mold, Penicillium, influenza virus, etc.; Affect health, causing respiratory diseases, skin diseases, diarrhea, pneumonia and other diseases; at the same time, it also accelerates the yellowing rate and aging rate of products.

We recognize the harm caused by pathogenic microorganisms to health, we need to establish a healthy and clean bathroom environment for prevention, help slow down the speed of product degradation, prevent the breeding of odors, stains, and pathogenic microorganisms, and make the bathroom environment fresher and cleaner. clean.

If the towels in the bathroom do not have antibacterial protection, pathogenic microorganisms will soon accumulate, and the odor will waft out. The investigation of the frequency of use of toilet products shows that two types of products need antibacterial treatment: one is the direct contact with people, such as toilet lids, washbasins, shower rooms, towels, toothbrushes; the second is due to the long-term humidity of the products In the environment, it is easy to breed bacteria or mold, such as bathroom cabinets, shower curtains, glass glue, etc.

Antibacterial towel, ceramic wash basin, toilet, ceramic tile antibacterial: antibacterial of ceramic bathroom products, can use Jinda's cubic cobalt phosphate silver-loaded technology to increase antibacterial function in ceramic glaze, the antibacterial material can withstand 1300 ° high temperature, calcined The loss rate in the process is small, and the antibacterial rate can reach 99%.

Antibacterial faucets and handrails: Stainless steel bathroom products are frequently touched and easy to accumulate pathogenic microorganisms to produce dirt and tarnish; antibacterial stainless steel technology can fundamentally change these problems, prevent cross-infection, and make home use more assured.

4. Application of antibacterial agents in plastics

The use of antibacterial plastics must first meet the necessary requirements for the physical, chemical, mechanical and other properties of plastics when used as basic materials, and at the same time consider the requirements for the special function of antibacterial and the additional factors arising therefrom.

In terms of antibacterial properties, it is required that antibacterial plastics can adapt to the environment of use, and should have high-efficiency, broad-spectrum, and long-lasting antibacterial properties.

Antibacterial plastics contain a small amount of antibacterial agents, and the antibacterial agents used are required to meet the specified hygienic safety and make the final antibacterial plastic products meet the requirements of non-toxic, odorless and environmentally friendly.

The surface of plastic products is smooth, and although it is easy to clean, the bacteria on its surface can still survive and multiply. , Achromobacter, Sarcinus, Pleiococcus and other pathogenic microorganisms provide nutrient-rich substances. It is difficult to clean thoroughly even if it is washed or disinfected with a lot of water in daily life.

The production of food-grade antibacterial fresh-keeping film and antibacterial fresh-keeping bag:

On the food-grade plastic base, 2%-5% silver ion antibacterial PE masterbatch is added to make antibacterial cling film or antibacterial safety bag, and the addition amount can be adjusted according to your own needs. The processing conditions can refer to the processing conditions of the matrix PE plastic. The addition ratio is a small amount, which is safe, non-toxic and odorless.

The making of antibacterial cutting boards:

Use 4%-5% silver ion antibacterial PE/PP masterbatch to make antibacterial plastic cutting boards, which can be antibacterial; the cutting marks are 1/2.6 of the wooden cutting boards, and the water absorption rate is 16/16 of the wooden cutting boards, which does not hurt the knife. It can also be sterilized by hot water without deterioration and deformation.

The making of the antibacterial refrigerator:

The refrigerator's inner liner ABS, refrigerator door seal PVC, door handle, crisper drawer PP and other components are made of antibacterial refrigerators with antibacterial technology.

Example: Choose silver ion antibacterial ABS masterbatch, add 5%-6% to plastic base to make antibacterial ABS refrigerator liner material. Before use, dry the masterbatch in a blast or vacuum oven at 80°C for 2 to 4 hours continuously, and adjust the addition amount according to your own needs.

The manufacture of antibacterial air conditioners:

The louver wind direction board, air outlet, air conditioning filter system and drainage system adopt antibacterial technology, which helps to inhibit the odor caused by the growth of bacteria and mold in the humid filter system, block the accumulation of bacteria and mold, and keep the air fresh.

For example: choose silver ion antibacterial masterbatch, add 5% to make antibacterial air-conditioning wind direction board (addition amount is adjusted according to your own needs).

The making of the antibacterial washing machine:

Washing machine door gasket, drain pipe, laundry tub made of antibacterial washing machine with antibacterial technology

For example: choose silver ion antibacterial masterbatch, and add 5% to make antibacterial washing machine door gasket and drain pipe (addition amount is adjusted according to your own needs).

The making of antibacterial toys:

Manufacturers should change their concepts in time and use food-grade antibacterial plastics as basic materials to make antibacterial toys to seize the market.

Graphene antibacterial application range:

Graphene virus-killing and antibacterial cloth has broad application space and market prospects, which can quickly kill viruses and bacteria in the air and water. It has been widely used in masks and protective equipment, air filters, space sterilization, sanitary protection products and other fields. It is used in functional products such as clothing and fabrics, in the sterilization and preservation of food, fresh fruit and food, in the sterilization of water and sewage, in the sterilization and disinfection of instruments, and can be used as electrostatic protection materials and radiation protection materials. The spread of the coronavirus-like virus is an effective prevention and control weapon to eliminate the epidemic.