What is antibacterial? What is the mechanism of action of antibacterial agent?

antibacterial agent

Antibacterial is a general term, including sterilization, sterilization, disinfection, bacteriostasis, mildew, corrosion, and so on. The process of killing bacteria by chemical or physical methods or hindering the growth, reproduction and activity of bacteria is called sterilization and bacteriostasis.

In the 1960s, people mostly used organic antibacterial agents to produce antibacterial textiles. With the successful development of inorganic antibacterial agents in 1984, antibacterial finishing has been developed rapidly, making antibacterial agents not only used in fiber and textiles, but also used in plastics, building materials and other products.
In the 21st century, with the advent of the aging society, the number of bedridden old people and home sanitarians has increased gradually, and the demand for elderly care products to prevent bedsores has also increased.

Due to the change from a production-oriented society to a life-oriented one, it will be an important topic in the future to develop and research products that are beneficial to human health and the earth's environment.

At present, there are three main antibacterial mechanisms of antimicrobials: controlled release, regenerative principle and barrier or blocking effect.

The current application of the appropriate antimicrobials is around the safety and comfort of the application, as well as the durability of the performance. With the enhancement of people's awareness of environmental protection, natural antimicrobial agents have attracted more and more attention, such as chitosan and chitin, etc. However, natural antimicrobial agents have obvious deficiencies in heat resistance and antibacterial durability. Although organic antimicrobials are widely used, they have some defects in heat resistance, safety release, drug resistance and so on. Inorganic antibacterial agent is a kind of antibacterial agent used more in the market, the technology is more mature, and have obvious advantages in the heat resistance, safety, long-term performance and other aspects, the market application prospect of which is very good.

Shanghai Langyi Functional Materials Co., Ltd. focuses on providing special functional additives solutions for ester based polymer materials, and continues to provide whole-life-cycle functional differentiated services for ester based polymer industry chain customers. We have independently developed AntibacMax®, an inorganic metal ion antibacterial agent, in response to market trends and new customer demands. AntibacMax® can sustainably release silver, zinc, copper and other antibacterial ions, and has a good bacteriostatic effect on broad-spectrum biological fungi. Adhering to the essence of traditional Chinese philosophy -- "unity of conscience, knowledge and practice", the company provides products, services and value feedback for customers, employees, shareholders, society and other stakeholders.

How much do you know about inorganic antimicrobials?

In recent years, there has been an increasing trend of malignant events caused by microorganisms. According to our understanding, many kinds of bacteria are on the toilet, such as E. coli, Staphylococcus aureus, staphylococcus white, bacillus subtilis, tetralococcus, etc. A lot of stuffs at home are easy to breed bacteria. Therefore, how to improve this problem relies on antibacterial agent.

In nature, there are many substances with good bactericidal or inhibitory function, such as some organic compounds with specific groups, some inorganic metal materials and their compounds, some minerals and natural substances. But at present, antibacterial material is more refers to the material who has the ability to inhibit or kill bacteria through the addition of certain antibacterial substances (known as antibacterial agent), such as antibacterial plastic, antibacterial fiber and fabric, antibacterial ceramics, antibacterial metal materials.

antibacterial agent1

I. Principle of bacteriostasis
A) Mechanism of metal ion contact reaction
The contact reaction results in the destruction or functional impairment of the common components of the microorganism. When the silver ion reaches the membrane of the microorganism, it is attracted by the coulomb force of negative charge, and the silver sac enters into the cell, reacts with the -SH group, making the protein coagulate and destroying the activity of the synthase.

B) Catalytic activation mechanism
Some trace metal elements can oxidize or react with the proteins, unsaturated fatty acids and glycosides in bacterial cells, destroying their normal structure, and thus making them die or lose their ability to proliferate.

C) Cationic fixation mechanism
Negatively charged bacteria are attracted to cations on antibacterial materials, which restrict their free movement and inhibit their breathing skills, thus causing "contact death".
D) Damage mechanism of cell contents, enzymes, proteins and nucleic acids
Antimicrobials react with RNA and DNA to prevent fission and reproduction.

Aiming at the market trend and new customer demand, Shanghai Langyis Functional Materials Co., Ltd. independently developed AntibacMax®, an inorganic metal ion antibacterial agent. AntibacMax® can sustainably release silver, zinc, copper and other antibacterial ions, and has a good antibacterial effect on broad-spectrum biological fungi. Compared with organic antimicrobial agents, AntibacMax® has better heat resistance, long-term release, chemical stability and safety.

What is antibacterial plastic masterbatch?

Antibacterial plastic masterbatch is a new organic antibacterial material developed and manufactured by special technology. Used in all kinds of plastic products, it is harmless to human body and has antibacterial effect on all kinds of harmful bacteria and mold.
After blow molding, pressure molding, blow molding and other processing, antibacterial plastic masterbatch produces food packaging materials, medical supplies, household appliances, automotive interior decoration materials, special quartermaster supplies, children's supplies and other articles for daily use and industrial supplies with antibacterial function.
Applicable resin: PE, PP, PC, PET, PS, PU, ABS, SAN, TPU, TPE (anti-bacterial, anti-odor, moisture, anion, microwave shielding, infrared scattering function, fiber spinning), special munitions.

Antibacterial plastic masterbatch
antibacterial agent2

Features: no toxicity through the mouth, no irritation on the skin, no toxicity in the environment; No environmental hormones; Ensure anti-bacteria, anti-mold effect; With high efficiency and broad spectrum of anti-bacteria, anti-mold, anti-algae performance; Lasting antibacterial effect; Good light and heat safety;
Application: electronic products, daily necessities, medical supplies, children's supplies, auto parts, food packaging materials, special quartermaster supplies, etc.
Shanghai Langyi Functional Materials Co., Ltd. focuses on providing special functional additives solutions for ester based polymer materials, and continues to provide whole-life-cycle functional differentiated services for ester based polymer industry chain customers. Langyi regards "technological innovation" as the foundation of enterprise development and encourages multi-disciplinary integrated innovation. We invest more than 10% of our turnover in R&D every year, and build an innovative R&D team with strong technical strength together with Fudan University, Donghua University and other universities. We have won many honorary titles such as "Shanghai Advanced Private Enterprise", "Shanghai High-tech Enterprise", "Shanghai Specialized New small and Medium-sized Enterprise" and so on.

What is antibacterial Polyester Yarn?

Antibacterial polyester yarn is a new generation of functional, healthy and comfortable textiles with antibacterial, hygroscopic and quick-drying functions. It combines the hygroscopic properties of cotton with the quick-drying properties of polyester to keep your skin dry at all times and effectively remove harmful bacteria and sweat odor.

antibacterial polyester yarn

Properties of antibacterial polyester yarn

The healthy and comfortable properties of antibacterial polyester yarn lies in the specially designed multi-groove fiber and unique fabric design and production method. It successfully introduces the principle of capillary nature into the development of textiles, and can quickly absorb sweat and moisture on the skin surface, transmit it to the surface of the fabric and send it away.The high profiled fiber section and fluffy yarn structure greatly increase the permeability and can keep the skin dry all the time without sticky feeling, thus achieving rapid moisture absorption and sweat elimination to improve the comfort.


Functional component of antibacterial polyester yarn----silver ion vs nano-silver

At present, most antibacterial textiles are made of finishing technology and modified yarns. The post-finishing technology has some disadvantages such as poor antibacterial property and water resistance, and its application scope is limited.

Among the modified yarns, silver modified yarns are more and more widely used in antibacterial textiles, such as silver ion modified yarns and nano silver modified fibers. Both of them have excellent antibacterial properties, such as washing resistance, long-term effect and quick effect, etc.

However, nano-silver modified yarn has potential threat to consumers' health, which has been publicly announced by some countries to restrict its use. Silver ion yarns are relatively safe.

How can ordinary yarn obtain the antibacterial function?

There are two main ways to obtain the antibacterial function for ordinary yarn, one is to add antibacterial products before spinning, the other is after finishing.

1.  pre-treatment

Silver ion antibacterial yarns are made by adding our AntibacMax® silver ion antibacterial agent in the former textile and have permanent antibacterial effect. It can inhibit the breeding and infestation of more than 650 harmful microorganisms. The antibacterial duration of the product is basically the same as the life of the product.


There are two key steps in making antimicrobial silver infused yarn :

Step 1: The antibacterial masterbatch for spinning was made by adding AntibacMax® silver ion antibacterial agent into the plastic masterbatch.

Step 2: silver ion antibacterial yarn can be produced after fully mixing, melting and drawing of the antibacterial masterbatch.


The antimicrobial silver infused yarn conforms to FZ/T73023-2006 standard, and can be used for people's livelihood, medical and industrial textiles such as sportswear, doctor's clothing, shoe lining, T-shirt, underwear, socks and home textile fabrics.


2. After finishing

The antibacterial function of common yarn can be obtained by treating it with our  AntibacMax® silver ion antibacterial finishing solution. The number of washing resistance and antibacterial effect are related to the quality of the product.


Test report shows that yarns and fibers treated by our AntibacMax® antibacterial agent can still reach AAA grade effect after washing 50 times. The products also meet the national Ministry of Health standards and the European Union ROHS requirements, without pollution to the environment.


Properties of antimicrobial silver infused yarn

1. Antibacterial and deodorant functions (inhibition rate of all kinds of conventional and special bacteria P>90%)

2. Adopt the most advanced silver ion physical slow-release technology to fix a large amount of silver ions on short fibers with a length of 3~5CM, so that silver ions can be seen and the loss rate is lower

3. Silver ions can be released stably for a long time through layer upon layer deposition, with washing resistance, antibacterial and deodorant properties more lasting

4, Strong deodorant, moisture absorption, sweat, good air permeability.

5. Hundreds of experiments by authoritative technicians have confirmed that the content of silver ion is just right.

6. Uniform distribution, antibacterial efficacy higher than 99%.

7, silver fiber after special treatment, will not appear due to oxidation caused by the appearance of the phenomenon.

8. Anti-static, eliminate the harm of electromagnetic wave to human body

9. Pure natural physical bacteriostatic, non-drug, non-organic, non-soluble precipitation, no skin damage, no side effects.

10. Can be dyed


What is the properties and application of AntibactMax®silver ion antimicrobial additive(EC 608-534-1 CAS 308069-39-8)

 1. The mechanism of silver ion antimicrobial additiveEC 608-534-1 CAS 308069-39-8 

At present, the sterilization mechanism of silver ions has not been finalized, but most studies have shown that the reason why silver ions have a bactericidal effect is that silver ions can quickly combine with the protein sulfhydryl (-SH). (-SH) is the necessary group of enzymes to lose activity, so that the bacteria can not be metabolized and die, so as to achieve the purpose of antibacterial.

 2. Advantages of AntibactMax®silver ion antimicrobial additiveEC 608-534-1 CAS 308069-39-8

 A.Efficient sterilization, long-lasting antibacterial;

B.Green, environmentally friendly, safe and non-toxic, no chlorine, no pungent smell;

C.Good heat resistance, acid and alkali resistance, not easy to react with other cleaning products.

3. Application of AntibactMax®silver ion antimicrobial additiveEC 608-534-1 CAS 308069-39-8


  •  Silver-loaded activated carbon

antimicrobial additive(EC 608-534-1 CAS 308069-39-8)

It can be used for drinking water disinfection to replace traditional chlorine disinfectants, and at the same time, through silver slow-release and controlled-release technology, to achieve long-lasting and efficient disinfection effects


  • Antibacterial fabric

antimicrobial additive(EC 608-534-1 CAS 308069-39-8)

The silver ion antibacterial agent is introduced into the fabric fibers to make antibacterial fabrics with long-lasting antibacterial properties. Antibacterial fabrics are mainly used in life and hygiene. Antibacterial fabrics have been used in surgical gowns, sanitary napkins, diapers, antibacterial wipes, bandages, footwear and underwear, etc.;

  •  Antibacterial ceramics

antimicrobial additive(EC 608-534-1 CAS 308069-39-8)

 The silver ion antibacterial agent is introduced into the surface glaze of ceramics and applied on the surface of sanitary ceramics to obtain surface antibacterial ceramics. Antibacterial ceramics are used in ceramic tiles and ceramic sanitary wares. They have good antibacterial properties and durability, which provide health protection for people's lives;

  • Antibacterial plastic

In the production process of plastic, silver ion antibacterial agent is mixed into it, or fixed on the surface of plastic to obtain antibacterial performance, that is, antibacterial plastic is obtained. Antibacterial plastics are mainly used in daily necessities, toys, children's products and household appliances abroad;

  •  Sterilization spray can be used for disinfection of living or production places

silver ion antimicrobial additive(EC 608-534-1 CAS 308069-39-8)

  • Antibacterial coating

Adding silver ion antibacterial additives to paint or paint can provide anti-mold, mosquito and termite functions, or eliminate bacteria and fungi;

  •  Antibacterial washing products

It can be added to washing products to increase the antibacterial effect of the fabric.

Different types of antimicrobial additives for textiles

Various antibacterial textiles currently seen on the market, including knitted fabrics, woven fabrics and non-woven fabrics, are basically produced by three methods:

antimicrobial additives for textiles

 One is to add the antimicrobial additives for textiles to the spinning material to make antibacterial fibers, and then make various antibacterial textiles. This method is commonly used to produce chemical synthetic fiber products.


The second is to add antimicrobial additives for textiles in the finishing process of fabric printing and dyeing, often called antibacterial finishing agents, and then make various antibacterial textiles. This method can produce pure natural fiber or pure chemical synthetic fiber products as well as blended fiber products, with wide adaptability, so most of the production of antibacterial textiles uses this method.


The third is to add an antibacterial agent to the spinning material to make an antibacterial fiber, and then add an antibacterial finishing agent in the finishing process of the fabric after printing and dyeing, and then make various antibacterial textiles. This method is only used in special products with high antibacterial performance requirements.


Antimicrobial additives for textiles can be divided into dissolution type antibacterial agents and non-dissolution type antibacterial agents. Since it is difficult for natural fibers to achieve antibacterial and deodorant effects through fiber modification, so far, the antibacterial and deodorant processing of natural fibers, such as cotton products, is still mainly after finishing.


In terms of physical properties, the dissolution type antimicrobial additives for textiles need to be fixed on the fiber with a cross-linked resin, and the antibacterial substance is slowly dissolved to achieve the antibacterial effect. This kind of antibacterial agent has low cost and good antibacterial effect, but it will kill the bacteria in the fabric and the bacteria on the skin indiscriminately.


The non-dissolvable antimicrobial additives for textiles reacts and combines with the hydroxyl and amino groups on the fiber, and only kills the bacteria in the fabric and the bacteria on the skin that the fabric fiber can contact. The actual contact surface is small on the microbial scale. It is safe and durable, but it is expensive.



Introduction of antimicrobial fiber

The outbreak of the global epidemic in 2020 has increased consumer demand for antimicrobial products. It is estimated that from 2021-2023, the global market for antimicrobial textiles will grow at a rate of nearly 30% per year.

antimicrobial textiles can prevent germs from multiplying on textiles and produce peculiar smells due to bacteria decomposing fabrics or dirt on them, thereby preventing the spread of diseases and causing harm to humans to a certain extent. At present, antimicrobial textiles have been widely used in various fields of people.

The development of antimicrobial textiles can be made directly with fiber designed with antimicrobial functions. Antimicrobial fibers generally include natural fibers and chemical fibers. The former refers to natural fibers that have an inhibitory effect on bacteria due to their special structure or the substances contained therein. The latter refers to essential antimicrobial chemical fibers such as chitosan fibers and chitin fibers, or antimicrobial fibers developed through physical and chemical modifications.

antimicrobial fiber classification

One type is natural fibers with antimicrobial function, such as certain hemp, bamboo fiber, chitin, etc. (It can only be said that it has antimicrobial effect, but the antimicrobial rate is not high, only reaching the qualified standard)


The other is the modified antimicrobial fiber made by adding antimicrobial agent to the fiber (excellent and controllable antimicrobial effect)

The modified antimicrobial fiber is made by physically modifying polyester or nylon, and spun filament or yarn by adding metallic silver to the fiber. According to the principle that silver ions inhibit the formation of bacterial cells, the antimicrobial effect is achieved. The antimicrobial rate of this fiber against Staphylococcus aureus, Escherichia coli, and Candida albicans all reaches more than 99%, and has a good antimicrobial effect.

Nylon-based copper ion antimicrobial fiber

Nylon-based copper ion fiber has copper ions firmly embedded in the fiber molecular structure, so it has strong and long-lasting antimicrobial, deodorant, and self-cleaning functions, and its antimicrobial effect is significantly higher than other antimicrobial fiber products. Especially the high-concentration copper ion content is the most obvious, the only production.

Modified cotton fiber with Chinese medicine function

Traditional Chinese medicine extracts are based on Chinese herbal medicines. According to the needs of the final product extracted, through physical and chemical extraction and separation processes, one or more active ingredients in the plant are oriented to obtain and concentrate without changing its effectiveness. The product formed by the composition structure. The Chinese herbal medicine extract is used as a functional agent to process fibers or textiles, so as to achieve the effects of antimicrobial, deodorant, mildew, moth, mite, and skin allergies.


Functionally modified cotton uses the effective ingredients extracted from traditional Chinese medicine to modify the cotton fiber. The effective ingredients of the traditional Chinese medicine are "implanted" into the cotton fiber to give the cotton fiber such as antimicrobial, anti-mite, anti-itch, anti-mildew, etc. Various functions make ordinary cotton fiber with high function or multi-function. The product is environmentally friendly, harmless to the human body, and has good washing resistance. The cotton fiber modified by plant traditional Chinese medicine has a bacteriostatic rate (to Staphylococcus aureus) of 92.4%, a mildew resistance level of 1, and a mites repellent rate of more than 78% after washing 20 times.