Classification of plastic antiseptic
Classification of plastic antiseptic
With the improvement of living standards, people pay more and more attention to health problems, but the environmental damage is becoming more and more serious, and the incidence of various diseases is getting higher and higher. According to statistics, about 17 million of the world's annual deaths are caused by bacterial infections. People are exposed to various kinds of bacteria, such as telephones, washing machines, computers, electrical switches, etc., which can become sources of bacterial pollution and disease transmission. To solve this problem, scientists began to look for a new way to make the material itself antibacterial or sterilizing, when antimicrobial material appeared. Because ordinary material is endowed with antibacterial properties, use them to make all kinds of products has the health function of self-cleaning and so has wide application prospect, therefore invested a lot of manpower material resources at home and abroad in recent 20 years, the development of antibacterial materials industry, has achieved remarkable economic and social benefits. Antibacterial plastics is a branch of antibacterial materials, is a kind of material that has antibacterial and bactericidal function, usually in plastic add one or several antimicrobial agent, it can be in a certain period of time will stick on the plastic kill or inhibit the breeding of bacteria. Because of the large dosage of plastic products in daily life, the wide use of surface, so the development of antibacterial plastic to improve people's living environment, reduce the incidence of disease, protect people's health, etc., all have very important practical significance.
Plastic antimicrobial agents can be used to keep certain organisms (bacteria, fungi, yeasts, algae, viruses, etc.) growing or breeding under the necessary levels for a certain period of time. The amount of additives in plastic is generally very small, which is generally divided into inorganic antimicrobials, organic antimicrobials and natural antimicrobials.
Inorganic antibacterial agent: silver, copper, zinc and other metal antibacterial ability, through the methods of physical adsorption of ion exchange, silver, copper, zinc and other metal ions (or its) fixed on the surface of porous material such as calcium fluoride, silica gel made from antibacterial agent, then join the corresponding products to obtain materials with antibacterial ability. The performance of the plastic products has no adverse effect.
Organic antibacterial agent mainly has fragrant aldehyde and ethyl vanillin aldehyde compounds, quaternary ammonium salts and metformin, in addition, chlorhexidine acetate, methoxyl benzyl penicillin, alcohols, phenols, organic metals, pyridine, etc also can be used as antibacterial agent for dysentery bacillus, strains of escherichia coli, staphylococcus aureus, etc, has good sterilization effect. The antibacterial mechanism is generally believed to be combined with the surface anions of bacteria and molds, or with the sulfhydryl reaction, which can destroy the synthesis of proteins and cell membranes, and inhibit the propagation of bacteria and molds.
Natural antibacterial agent is extracted from natural plants, such as chitin, castor oil, mustard, horseradish, convenient use, antibacterial effect is limited, but poor heat resistance, sterilization rate is low, not broad spectrum long-term use and few in number.
Plastic antimicrobials added to plastics not only need to meet low cost requirements, but also have excellent compatibility and can maintain high thermal stability during processing. In addition, antimicrobials must be able to migrate to plastic surfaces to prevent microbial growth. Organic antimicrobials are widely used.
The research of antibacterial plastics began in the 1980s and has been developing rapidly in recent years. In Japan, the developed countries such as the United States and Western Europe have a great development. Japan, in particular, has a wide range of antimicrobial plastic applications, ranging from appliances, food packaging, cultural products, kitchen supplies, auto parts and wire cables. Now it is applied to building materials and interior decoration materials, and also to develop foreign markets, and have exported antibacterial products to developed countries such as southeast Asian countries and Europe. And antibacterial plastics in our country is developed in recent years, in the beginning of the haier group antibacterial refrigerators, refrigerator manufacturers to follow suit, then are introduced such as new flyer, changling, snow antibacterial products, formed a strong "antibacterial household appliances" shockwave, greatly promote the application of the antibacterial plastics. The antibacterial fridges are well received by customers after entering the market, which shows good market prospects. Now some new antibacterial plastic products have come into the market, and they have been used in many ways. But as for the present situation of antibacterial agent, domestic antibacterial antibacterial performance compared with foreign antibacterial antibacterial properties, there is a certain gap, so a batch of institutions of higher learning, scientific research institutes are the soldiers in chapter 6, the antibacterial plastics such as research progress
Research work in this field, timely tracking foreign advanced technology, and through the "production, study and research", in the form of cooperation with the enterprise develop new antibacterial plastic products, such as xian, hebei double spirit, deep China Shanghai companies such as security, Beijing saite rui are similar, and have a small amount of antibacterial products to the market, and shows good economic benefits. Also in domestic began to actively searching for new method development of antimicrobial products, such as shijiazhuang compared to packaging co., LTD., using molecular assembly antibacterial technology, on the premise of not join any antimicrobial agent, through the matrix resin on the molecular chain of assembly on the optimization of antimicrobial function group, thus avoiding the heavy metal pollution, such as poor heat resistance and short duration of drug abuse, has the highly effective broad spectrum, safe and non-toxic, long-term effect and low cost, can better protect the environment, thus it can be foreseen molecular assembly antibacterial will be the main research direction in the future
