The application prospect of the hottest nanotechno

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Bright application prospect of nanotechnology in corrugated boxes (IV)

(II) nanotechnology in carton packaging

1 Nano materials are used for anti-counterfeiting packaging of cartons. Generally, the metal particles are black, with the characteristics of absorbing infrared ray, large surface area, high surface activity, and sensitive to the surrounding environment (temperature, heat, light, humidity, etc.). The nano particles with these characteristics are added to the packaging materials, or made into a coating or polishing agent and coated on the surface of the materials for use in the product packaging boxes. When people choose commodities, they can be identified by heat, light or temperature, so as to achieve the purpose of anti-counterfeiting. In other words, the use of nanotechnology can achieve the purpose of color anti-counterfeiting, physical and chemical effect anti-counterfeiting, so as to improve the level of anti-counterfeiting technology

2. Sensors are an important field in the application of nanotechnology. With the progress of nanotechnology, micro sensors with lower cost and stronger function will be widely used in all aspects of social life. For example, if the micro sensor is installed in the packaging box, the transportation process of valuables can be tracked and supervised through the global positioning system; In the field of food industry, this kind of micro sensor can be used to monitor whether food is spoiled. For example, it can be installed on the bottle cap to judge the condition of wine

(III) application of nano biotechnology in carton anti-counterfeiting

dna, as a biological macromolecule, is the basis of biological genetic material. The core content of modern genetic engineering technology is the molecular operation or molecular cloning of DNA. At present, DNA is widely used in non biological aspects, such as biological computer, nano biology and DNA used for commodity anti-counterfeiting. The use of DNA in commodity anti-counterfeiting was pioneered by Le page and Slater (Lepage and Slater 1987). The basic process is to add a piece of DNA with a length of 1~10kb to a specific commodity as a signal molecule, use the double strand complementarity of DNA to obtain a probe DNA molecule, and directly project the hybridization signal between the change of experimental load and the signal DNA molecule according to the output of the probe DNA molecular sensor labeled with isotopes or non homologues, revealing the existence of the signal molecule, And thus determine the authenticity of the goods

in the ratio of 1: (10~20) and 1: (10~9), the code mark DNA is mixed into water and low alcohol wine (alcohol content is less than 40%), and 1ul liquid sample is taken directly. PCR detection can also give correct results. At present, we are trying to add DNA in the production process of packaging cartons to facilitate the anti-counterfeiting of cartons

(IV) other applications of nano corrugated boxes

1 The United States has developed a coating called repelkote, which solves the problem that products are often attacked by pests during storage and transportation. Repelkote coating can prevent pests from breeding in packaging products such as rice, corn flour, flour, food batter, dry cereals, baking mixes, biscuits, dry pet food, instant food mixes, textiles, fruits, flowers and vegetables

repelkote is extracted from natural ingredients (Holly oil) and used as a laminating layer in the conversion operation to fold cartons, corrugated boxes and multi-layer paper bags. The product is usually used for the outer layer of packaging materials or the inner layer of multi-layer paper bags

repekote is used in folding cartons, corrugated cartons and multi-layer kraft paper bags as a pressure coating in the conversion operation

in North America, Karosta sells folding cartons, multi-layer kraft paper bags and corrugated cartons with repalkote coating every year, worth US $30million. It is understood that this technology can bring essence into the coating solution, use it in the bottom layer, and drive away pests through the controlled release of active ingredients, so that there will be no return of samples due to pollution, and the cost will be reduced

2. Aroma packaging mecormick company of the United States introduced a new type of aroma packaging material, which is aluminum foil free perfrma paperboard. It contains special coating, can keep the aroma for 3 years, and has the function of anti ultraviolet radiation. It is used as packaging board

3. Anti counterfeiting sealing paper Montreal paper factory of Canada has developed and produced self-adhesive sealing paper, which is used for packaging food to avoid the trouble of binding and binding with string during packaging. The outer layer of this paper is kraft paper, which can be used for writing and printing. The inner layer is a special polypropylene foaming material, which is tough and non-toxic. It has the functions of moisturizing and heat preservation, and the juice, flavor and smell of the packaged food will not be leaked. Once unsealed, it loses its stickiness and has a certain anti-counterfeiting function

4. Packaging materials for detectable pathogens Canadian tox inalert company has developed a new packaging material for detectable pathogens. Four kinds of pathogenic bacteria including Salmonella, Campylobacter, Escherichia coli 0157 and Listeria can be detected by using the protein based antibody detection system. Discoloration reaction occurs when the packaging material contacts the contaminated food. The packaging material can also be used to detect the protein characteristics of the unit insect or genetically engineered food of Jinan new period assay instrument Co., Ltd., which is a professional laboratory. This kind of packing material can be processed into any shape and is suitable for different product needs. 80% of the components are polymer films, and the rest are metal foil and paperboard

5. Anti bacterial and fresh-keeping packaging boxes Sendai packaging company of Japan has developed non-woven fabrics with anti-bacterial and fresh-keeping functions, which are used to make anti-bacterial and fresh-keeping packaging boxes to contain fish and other foods. Weak energy will be generated in the packaging box to activate fish tissue enzymes, prevent the free water in the food and prevent food corruption

6. Electron beam sterilization is a new technology developed in the United States to replace hydrogen peroxide and steam sterilization. Electron beam sterilization has the characteristics of low cost, high efficiency, especially the sterilization effect on the inner wall of containers. California company has installed an electron beam generator on the packaging and printing machine, which can carry out sterilization treatment at the same time of printing

the application of nanotechnology in corrugated box is far more than these, and almost involves all aspects of corrugated box and paperboard manufacturing. The "nano corrugated box" that Zhejiang has successfully developed is only a precedent. In the 21st century, nanotechnology is the latest technology to create high-performance, high-efficiency, high-function and other high-tech packaging. It can be predicted that in the traditional packaging, printing and corrugated box industry, nanotechnology shows strong competitiveness in the market, and nano materials will have strong development momentum and broad application prospects

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