The Selection Of Auxiliaries Should Follow The Basic Requirements Of Antibacterial Finishing Agents For Nonwoven Fabrics.

< p > as the most important auxiliaries of < a href= "//www.sjfzxm.com/news/index_c.asp" > nonwoven > /a > antibacterial materials, there are many kinds of antibacterial agents available for nonwoven finishing.

According to the final use of nonwoven fiber materials and antibacterial nonwovens, the requirements for antibacterial finishing agents are not only the same.

But generally speaking, the antibacterial agents used for antibacterial finishing of nonwovens should meet the following requirements.

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< p > 1, < a href= "//www.sjfzxm.com/news/index_c.asp" > antibacterial > /a > efficiency.

And antibacterial agents have good antibacterial properties at low concentrations.

It can be measured by minimum inhibitory concentration (MIC) and minimum bactericidal concentration (minimum concentration of MBC).

The smaller the MIC or MBC, the higher the antibacterial efficiency of antibacterial agents.

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< p > 2, wide antimicrobial spectrum.

That is, it has inhibitory or killing effects on various microorganisms and different strains of the same microorganism.

There are so many kinds of microbes that antimicrobial agents can only exhibit antibacterial activity against some of the microorganisms that are yet to be determined, but do not show any antibacterial activity against other microorganisms.

Antibacterial agents that can simultaneously exhibit antibacterial activity for many microorganisms become broad-spectrum antimicrobial agents, and only one or a small number of antimicrobial agents exhibiting antibacterial activity become specific antibacterial agents.

Antimicrobial agents that can exhibit antibacterial activity form the antimicrobial spectrum of the antibacterial agent.

During the use of nonwovens, especially non permanent Yongping, there will be many kinds of microbes in the process of using them. Therefore, the antibacterial finishing agents that need to be used have broad-spectrum antibacterial properties.

However, in practical applications, it is unrealistic to ask the antiseptic to have no wakefulness or consistency for all microorganisms. Different requirements for antimicrobial spectrum of antibacterial agents can be put forward according to the use of nonwovens, such as Staphylococcus, Klebsiella pneumoniae, Serratia marcescens and other main pathogens in the hospital environment.

Therefore, the antibacterial finishing agent of medical nonwovens needs to inhibit the activity of the above comic.

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< p > 3, good stability.

The stability of the antibacterial finishing agent causes the stability of the physicochemical energy of the antimicrobial agent with time or environmental mounting, including the antibacterial effect, the appearance, color and physical properties of the antibacterial agent. It requires that the antibacterial agent is not affected by the environment of ultraviolet, visible light, heat and water in the process of finishing, using, storing and other processing, and has inert reaction with the common textile auxiliaries such as fuel, and does not affect the physical properties and appearance of the nonwoven fabric.

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< p > 4, < a href= "//www.sjfzxm.com/news/index_c.asp" > safety < /a > good.

Safety is an important requirement for antibacterial finishing agents.

Most of the antibacterial finishing agents are synthetic organic or inorganic compounds. Their chemical composition is complex and has certain body toxicity. It may cause some harm to human body in its production and use.

For example, some heavy metal compounds used in the early years are banned because of their toxicity to the body.

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< p > in order to use antimicrobial agents safely, toxicological evaluation is usually needed.

In addition to making the necessary analytical tests, toxicological evaluation usually obtains data through animal toxicity tests. The important criteria for workers are: acute toxicity test, subacute toxicity test, chronic toxicity test.

Carcinogenicity test; mutagenicity test; skin irritation test; eye irritation test; skin allergy test.

Among them, acute toxicity is the most important. It refers to the toxic effect caused by one contact with foreign compounds. Acute toxicity can preliminarily estimate the risk of this compound to human beings. The toxicity is usually expressed by the median lethal dose, that is, in the population of the derivatives, which can cause half of the biological death. The smaller the lethal dose is, the smaller the toxicity is.

More lethal compounds can be classified into highly toxic, highly toxic, moderately toxic and low toxic ones.

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< p > the toxicity of antibacterial agents is not only related to the chemical structure and physical and chemical properties of the substances themselves, but also related to the conditions such as the concentration, the time of action, the way of contact and the interaction between the substance and the substance, and the functional state of the collective.

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< p > 5, good compatibility and suitable for finishing.

The antibacterial agents need to be combined with non woven fabrics to support the use of the corresponding products, so the selected antibacterial agents have good compatibility with the corresponding nonwoven fabric and can be adapted to the finishing process requirements.

Good compatibility and strong adhesion between antibacterial agents and nonwoven fibers are also required to ensure that the antibacterial agents will not cause excessive loss and improve antibacterial durability during the use.

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< p > 6, the price is suitable.

Price is also a factor to consider in choosing antimicrobial agents.

The production cost of nonwoven products with antibacterial agents will increase. The increase of this cost should be matched with the increase of the economic efficiency brought by the increase of the antibacterial products, but not the market shrinkage due to the cost.

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