Recently, with the emergence of new forms of sharing economy, after sharing bicycles and sharing cars, various news such as sharing umbrellas, sharing mobile phones, and sharing charging treasures have swarmed. It seems that our life has entered the era of sharing. With the heat of the “sharing economy”, how should people be placed as plastics?

The average daily usage of each shared bicycle is about 7~10 times, up to 20 times. According to the calculation of 40,000 bacteria per person, it is possible to deal with the bacteria in other people's hands every day from the handlebars of shared bicycles. Try to calculate that the average number of bacteria in the shared bicycle handle is as high as 800,000-8 million. That is to say, there are millions of bacteria that use a shared bicycle as a relay station to switch. This is not a place where the seat and other bodies may come into contact.

Therefore, Xiao Bian believes that under the new heat of the sharing economy, the antibacterial plastics market will be detonated. Next, Xiaobian will give you a detailed introduction to the antibacterial modification of plastics and its current application. Welcome to join the Aibang Plastics Industry Group, scan the QR code below, and communicate with industry professionals.

1. Introduction to antibacterial plastics and classification of common antibacterial agents

Antibacterial plastic is to add a certain amount of antibacterial agent to the plastic to make it have antibacterial properties, but at the same time without losing the original performance of the plastic product. At present, commonly used antibacterial agents are mainly divided into three categories:

(1) Inorganic antibacterial agents: can be divided into two major categories : metal element antibacterial agents and photocatalytic antibacterial agents . Conventional metal element antibacterial agents mainly include metals such as Ag, Cu and Zn and their compounds. The photocatalytic antibacterial agent is an anatase type semiconductor oxide such as TiO2, SiO2 or the like.

(2) Organic antibacterial agents: mainly refers to synthetic organic antibacterial agents. Common types include quaternary ammonium salts, double muscles, alcohols, phenols, and organic metals. The heat resistance is poor and can only be used below 300 °C.

(3) Natural antibacterial agents: mainly derived from plants and animals, such as peppermint, lemon leaf extract, chitosan obtained by deacetylation of arthropod extract chitin. Chitosan is biocompatible and is currently a hot topic.

2. Preparation and detection of antibacterial plastics

Preparation of antibacterial plastics: The key to antibacterial plastic processing is to improve the dispersibility and compatibility of antibacterial agents in plastics, as well as the stability of antibacterial agents during processing. Common methods include direct addition, antibacterial masterbatch, surface adhesion, lamination and post-processing. Direct addition and antibacterial masterbatch methods are mainly used in the preparation of raw materials. Surface adhesion, lamination and post-processing are mainly used in the molding process of products. The masterbatch method is currently the most commonly used preparation method.

Performance testing of antibacterial plastics: At present, domestic and international testing standards mainly include ASTME2149 (2010), ISO22196 (2007), JISZ2801 (2006), QB/T2591 (2003), JC/T939 (2004) and GB21551.1 (2008).

The two most commonly used indicators for evaluating antimicrobial performance are the antimicrobial rate and the bacteriostatic ring. Antibacterial rate /% = (number of bacteria on the blank sample - number of antibacterial sample bacteria) / number of blank bacteria × 100. The antibacterial ring is a semi-quantitative characterization method that evaluates the strength and weakness of the antibacterial ability by measuring the size of the antibacterial ring.

After understanding the basic knowledge of antibacterial plastics, Xiaobian will take a look at the research progress and market application of antibacterial plastics in recent years. Judging from the current research capabilities, will the market for antimicrobial plastics erupt once the “shared economy” arrives?

3. Development and application of antibacterial plastics in recent years

(1) Huitong antibacterial glass fiber reinforced material

Ordinary washing machines will start to breed bacteria after a period of use. With the appearance of washing machine drying and hot water self-cleaning functions, the requirements for antibacterial materials are getting higher and higher. The antibacterial glass fiber reinforced material developed by Hefei Huitong has an antibacterial rate of over 95% after 2000 standard washing cycles. After the detergent resistance test according to UL2157, the mechanical property retention rate is above 85%, and the UL2157 is resistant to detergent. After the test, the mechanical properties retention rate was above 85%.

(2) aiming at “secondary pollution”, Haier will build a no-clean antibacterial smart washing machine

In 2014, Haier officially released the “no-clean” washing machine developed over the past six years. According to the introduction of Haier technicians, the wisdom ball between the inner and outer barrels of Haier's “clean-free” washing machine is made of antibacterial polymer material, which is made of antibacterial polymer material. During the cleaning process, the inner and outer barrels of the washing machine can be fully lifted with the water level. Azimuth cleaning, so as to ensure that the dirt does not adhere, fundamentally eliminate the problem of barrel dirty.

(3) Establishment of the Antibacterial Alliance of China, Japan and Korea

At the China Household Electrical Appliances Expo (AWE2015) held in March 2015, China, Japan and South Korea announced the establishment of the China, Japan and South Korea Antibacterial Alliance. The establishment of the alliance opened a precedent in the history of antibacterial, and the antibacterial standards for household appliances in Japan and South Korea will pass. The alliance was sent to China.

(4) Brazil's Agrindus developed a nano-silver antibacterial bottle

Agrindus and Nanox have collaborated on the development of a nanosilver antibacterial bottle that effectively extends the shelf life of milk. It involves quartz ceramic particles and nano silver. These particles are broken into powder and then appear in liquid form. Extend the shelf life of 4 to 10 days by blow molding or injection molding. According to Agrindus, the nano-silver particles are embedded in plastic and will not separate and mix with milk.

(5) Midea's first new health concept air conditioner - antibacterial and mildew is more efficient

Midea launched antibacterial mildew air conditioner hang-up secondary energy efficiency KFR-26GW/WXAA2@ (ceramic white), using high-cost silver-containing composite antibacterial material, antibacterial rate of up to 99%, mildew grade 0 (the highest level) effectively inhibits mold growth To achieve sterile clean air supply.

(6) American PMP company launches new antibacterial masterbatch

PMP Company of the United States has launched a new antibacterial masterbatch for polyolefins, SanaforPO-5, which is an antibacterial masterbatch containing 5% zinc pyrithione, which can replace silver-based antibacterial agents and is added during polyolefin processing. There is no adverse effect on the mechanical properties of the polyolefin. The application results of SanaforPO-5 show that it can effectively control the growth of microorganisms on the plastic surface, and can provide long-term protection for plastics, preventing stains and odors which may be caused by bacteria, mold, mildew and algae.

(7) LANXESS successfully registered the innovative plastic protectant in the US Environmental Protection Agency, a new bio-killing formula specially developed for the plasticized PVC market:

In 2016, a number of biocidal formulations based on the active ingredients thiabendazole (TBZ) and iodopropynyl n-butyl carbamate (IPBC) have successfully completed the US Environmental Protection Agency (EPA). FIFRA registration (US Federal Insecticide, Fungicide and Rodenticide Act). LANXESS will sell this range of products under the brand names BIOCHEK®8064, BIOCHEK®8064 DOTP and BIOCHEK®8065.

(8) American Riverdale launches antibacterial agent for engineering thermoplastics worldwide

(9) Antibacterial solutions for home appliances - Shanghai Runhe Nano Materials Co., Ltd.

In 2017, at the 31st China International Plastics and Rubber Industry Exhibition, the words "antibacterial, anti-mildew, anti-corrosion" on the NAFUR booth attracted many customers at home and abroad to consult. Shanghai NAFUR is mainly used for antibacterial, mildew and antiseptic. Its application fields include household (automobile) appliances, kitchen and bathroom appliances, daily necessities, and foaming. Application materials cover PE, PP, PVC, ABS, TPR, GPPS, AS, etc.

Aibang concluded: According to statistics, in 2015, the global industrial market for antimicrobial plastics will reach 1.4 billion pounds, the market for consumer goods will be 1.03 billion pounds, and up to 20% of global plastic products will have antibacterial function.

With the large-scale application of plastic products, and the arrival of shared life. Consumers' antibacterial requirements for plastic products will also become higher and higher. In addition, at present, the diseases caused by various germs have exploded, and the requirements for the safety and safety of products have become stricter. Especially after the sharing of the economy, it will promote the outbreak of the plastics modification market. Especially in the electrical appliances, automobiles, mobile phones and electronics.

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