Intelligent packaging technology and its developme

2022-09-22
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Improper use of intelligent packaging in the international market will lead to the fracture of the sample at the fixture, leading to the failure of the experiment technology and its development (III)

(3) invisible identification system

biocode of the United States has successfully developed a new invisible identification system -- using antibodies as a new material for making anti-counterfeiting identification

this system includes two objects: the marker compound added to the product and the antibody used to identify the existence of the marker and make quantitative analysis if necessary. The marker compound can be a daily chemical, but it must be durable, inert, easy to mix with the product, and meet the requirements of health and regulations. These marks are usually mixed into the product in a small amount of a few percent. Antibodies are specific biometric molecules, and each antibody only recognizes or binds to a specific 72 metal faced rock wool, mineral wool sandwich compound. There are two kinds of marker recognition operations: field test and laboratory test. It can be used to test whether the marker exists or not, and the accurate content can be measured for the replaced or diluted products

surface stealth technology has the following advantages: specific graphics and positions are suitable for specific users; True invisibility; ③ Printed labels with markers can be used, and a set of customized inkjet system can also be installed; High safety (because the marker cannot be seen when there is no specific antibody, and the specific antibody is strictly controlled); The logo image can be erased and redisplayed

product external invisible identification technology has been widely used in drugs, cosmetics and other aspects. Invisible trademarks using antibodies can be used in a wide range of applications, from jeans to automotive fuel. Food additives containing antibodies have been approved by FDA. Because the antibody is non-toxic and tasteless, it can be directly added to whisky to prevent counterfeiting

compared with hologram logo, invisible anti-counterfeiting trademark has more vitality

(4) laser coding

laser coding is mainly used for printing the production date and product batch number of packaging, and anti-counterfeiting is not its primary function. Because the laser coder is expensive, it can only be used in mass production or occasions where other printing methods cannot be achieved, so it can play a role in anti-counterfeiting packaging

laser coding sealing technology is a better anti-counterfeiting technology for containers. After the product is filled and sealed, laser printing is carried out at the joint between the cover and the container, so that the upper half of the font is printed on the cover and the lower half is printed on the container

the anti-counterfeiting effect of this technology is that packaging containers cannot be reused. Cold drawn steel bars: each batch of cold drawn steel bars should be subject to 2 tensile tests. The new cover matches the old container, and the handwriting is difficult to align; Lasers are expensive and are coded and printed on the production line. Generally, it is difficult for counterfeiters to invest a large amount of money to buy this equipment; The manufacturer can change the printing template at will. Different templates are used on different dates. Only a few people know the details of replacement, which is difficult for outsiders to crack

in terms of anti-counterfeiting effect, laser coding technology is no worse than laser holographic image technology. The laser holographic logo is printed by the printing factory, and the manufacturer using the logo cannot ensure that the master will not flow out of the printing process or be copied illegally. Laser coders are expensive and must be used. Coupled with the secrecy of the replacement and transformation of font templates, it is difficult for scattered small and medium-sized factories to make fake products

(5) intaglio printing anti-counterfeiting

intaglio printing carries ink in pits carved according to the original text. The thickness of lines and the thickness of ink can be controlled during engraving, which is not easy to be imitated and forged, especially the depth of ink pits. The possibility of realistic carving based on printed graphics and texts is very small. Therefore, paper money, stamps, securities and precious works of art are generally printed in intaglio. Due to its anti-counterfeiting effect, intaglio printing has been increasingly promoted to enterprise trademarks, packaging and decoration printing

the anti-counterfeiting advantage of gravure printing is that manual engraving gravure can implement secret anti-counterfeiting methods. It is particularly effective to allow the substrate with high plate making cost to adopt manual engraving for plate making with small printing volume. Counterfeiters who pursue short-term interests may not be willing to take this investment risk; Plate making and printing are carried out in different places. Try to separate the two working links of plate making and printing, so that the fewer people who know the core content of the whole trademark (or securities) printing work, the better. Of course, attention should also be paid to prevent the theft of printing plates and printed materials; It can be combined with anti-counterfeiting ink technology, and adopts a unique special ink. The composition, particle fineness and additives are kept confidential to the outside world. Even if the printed matter has a unique effect, it has the function of secret anti-counterfeiting

(6) special processes and materials

some products can occupy the market for a long time, that is, they rely on their own special processes. This is an effective means of secret anti-counterfeiting. The products with unique production technology are less likely to be forged. It is also a common anti-counterfeiting method to use materials unique to our company in packaging. A typical example is the use of special paper and safety lines in banknotes

(7) special packaging structure

disposable packaging containers, once opened, will be scrapped by themselves and cannot be reused. This can prevent cheating or forgery of "new wine in old bottles"

tamper evident packaging, which is widely used in food and beverage, also has a certain anti-counterfeiting function to prevent products from being stolen and adulterated. Some containers can be designed to be difficult to counterfeit -- add your own company's technical secrets to the structure or manufacturing process

2. Active packaging (AP)

active packaging is mainly used in food packaging. Compared with the past physical methods to block gas, water vapor and light, it plays a positive and proactive role in extending the shelf life of food and can provide better protection. Therefore, as an intelligent technology, active packaging is being widely developed and applied

in order to control the specific gas in the package, chemical substances that can absorb or release specific gas are used. Its functional system includes the use of fungicides, deoxidizers, odor absorbers or releasers, light barriers, antifogging agents, anti sticking agents, stabilizers and enzyme inhibitors

(1) oxygen absorption system

the oxygen in food packaging will accelerate the corruption and deterioration of many foods. Oxygen can cause many foods to produce peculiar smell, color change and loss of nutritional value, and can accelerate the reproduction of bacteria. Deoxidizer is the most studied and patented field among all active packaging technologies. Individual bags containing deoxidizers placed in packages have been commercially available. The deoxidizer in the small bag is usually iron oxide ground very fine

deoxidizer can also be designed to be directly combined with packaging materials. However, this deoxidizer is composed of unsaturated hydrocarbons containing olefin bonds and a transition metal catalyst. Its components are specially designed to overcome the disadvantage of slow oxygen absorption at low temperature

Mitsubishi Gas Chemical Co., Ltd. solves a serious disadvantage of most known oxygen absorbers: their oxygen absorption reaction cannot be carried out smoothly in the absence of water. The deoxidizer system is composed of several unsaturated fatty acids (PUFA). Some carrier oils (non oleic acid, linoleic acid or linolenic acid in soybean oil, sesame oil and cottonseed oil) or PUFA are mixed with transition metal catalyst and an alkaline substance (calcium carbonate) to solidify them into deoxidizer. The deoxygenation method of enzyme catalytic oxidation system has also been successfully explored

(2) carbon dioxide scavengers and generators

high levels of carbon dioxide are required in some food packages because they can inhibit the reproduction of bacteria on the surface of food and reduce the respiratory rate of fresh crops (such as fruits and vegetables). It is necessary to produce various concentrations of carbon dioxide in regulated atmosphere packaging to meet specific food requirements. However, since most plastic films have greater permeability to carbon dioxide than oxygen, it is necessary to step up the production of carbon dioxide in some packaging to maintain the necessary gas composition. On the contrary, some foods (such as coffee) will release carbon dioxide, so carbon dioxide must be absorbed to avoid food deterioration or burst packaging

there are only a few completed carbon dioxide absorption systems or generation systems in commercial applications, so they are still important research topics

(3) ethylene scavenger

ethylene can act as a hormone and ripening initiator for some fresh and immature dynamic experimental machines, mainly including: fatigue testing machine: News universal testing machine, unidirectional pulsation fatigue testing machine, impact testing machine, etc. It can accelerate aging and reduce their shelf life. Ethylene absorption system can irreversibly absorb ethylene produced by fruits or vegetables, and only a small amount of scavengers are needed. A special scavenging system (CSIRO in Australia) will appear pink when reacting with ethylene and can be used to show the degree of reaction and the presence of ethylene scavengers

there are also common ones that can play a similar effect: put the scavenger into the bag conducive to ethylene penetration; The scavenger is directly added to the packaging film, and the reaction is potassium permanganate, which oxidizes ethylene into acetate and ethanol and passivates ethanol, etc

(4) release system of sterilizer

some preservatives can be used as active substances. They are added to polymer packaging materials or attached to packaging materials to achieve sterilization

active substances that can be used as sterilization agents include ethanol and other alcohols, sorbates, benzoates, propionate, bacilli and sulfur. In 1997, Ghosh et al. Used the mixture of calcium sorbate and carboxymethyl cellulose as a sterile coating solution. Recently, Han (1996) studied the release system of adding potassium sorbate into plastic film and using sterilizer. In other development work, imazalil, a fungicide, was chemically combined with plastic film to block the growth of mold. Another example is the zeolite film, that is, the zeolite is immersed in the antibacterial compound, and then combined with the plastic matrix to slowly release the antibacterial compound outward

it has been proved that spraying ethanol on the surface of bread and other baked goods before packaging can prolong their shelf life. A new method developed in Japan to produce ethanol vapor to prolong the mold free shelf life of cakes is: food grade ethanol is first absorbed into an inert fine powder, and then put them in a small bag that can penetrate water vapor. The inert powder absorbs moisture from the food and releases ethanol vapor through the small bag and enters the remaining space of the package

other systems of active packaging that have been realized or are about to be realized include: anti oxygen film, odor absorption and release system, anti adhesive film, anti fog film, light blocking and light regulating components, etc

active packaging is widely used and has an increasing momentum. In particular, the efficiency of active packaging in extending the shelf life of food is very significant. As Dr. Theodore labuza of the University of Minnesota declared, "in the near future, the change of active packaging will not be a general progress, but a revolutionary change". As a kind of intelligent packaging, active packaging is regarded as a revolutionary change in the packaging industry and the hope of the new century

3. Electronics integrated packaging

(1) microwave oven automatic food packaging

microwave oven food packaging will be a precedent for the application of electronic information technology in packaging. Rutgers, USA

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