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Flexographic printing and interactive packaging

in today's society, a major challenge facing consumer goods processing enterprises is not only to develop new products to attract consumers' attention, but also to maintain consumers' loyalty, which all depend on the proper application of product packaging. Packaging and printing is the key to success and also the direction of future market investment

flexographic printing technology brings vitality to the packaging field, which can effectively improve the characteristics of outer packaging. In recent years, a new concept - interactive packaging has emerged in the packaging field, which includes sensory packaging, functional packaging and intelligent packaging. This concept has made packaging and printing go beyond the scope of just improving the image effect, but become a part of the product, even the product itself. The packaging processing process uses the way of directly connecting packaging and products to identify and classify the most advanced materials. The materials have excellent impact resistance (even at low temperature) and high chemical corrosion resistance, and finally get packaging, and make people have a strong sensitivity to these final packaging, which brings considerable profits to consumers and consumer goods processing enterprises

now, we) can see a variety of packaging products in the market. For example, packaging with smell, packaging with certain texture, and packaging with exaggerated visual effects. While packaging products continue to diversify, it also opens a market door for flexographic printing, which is another application in the packaging field after lithography and high-cost gravure printing

I. functional packaging

functional packaging is a scientific method to solve the packaging problems related to contents. An example of functional packaging is the anti-corrosion of liquid packaging boxes. The application of such packaging can keep perishable products fresh longer. For example, adding a special cover to the fruit juice packaging box and heat sealing treatment can prolong the shelf life and taste of fruit juice

another example of functional packaging is the packaging box designed to eliminate certain defects and uncertainties of the product itself. If some accessories are attached to the packaging box to eliminate the odor and gas in the product, such packaging accessories can also prolong the storage of the product. This is one of the aluminum calendering production bases with advanced equipment and complete supporting facilities in the world, so as to maintain the fresh taste of the product

functional packaging can effectively avoid the interference of contents and play a role in retention, such as packaging drugs with shrink film. In addition, anti-interference packaging is also widely used in product promotion and promotion activities. A foreign printing enterprise printed the product slogan on the outside of a beverage packaging box, and printed the bar code on the inside of the packaging box. Since the bar code is printed internally, it is difficult to fabricate. The ink used for internal printing is harmless to human body, and these inks will not stick to the product. In some cases, images are laminated between two films, that is, images are printed on two films respectively, and then the two films are registered and pasted together

II. Sensory packaging

sensory packaging can make consumers have an intuitive feeling about packaged products, such as touch, vision or smell. The functional packaging mentioned above is mainly used to protect the internal things (actual products) of the packaging from losing any value, while the sensory packaging mentioned here is mainly used to establish an external overall feeling, such as smell, texture structure and visual effect

for example, some feel that the package extracts the smell of internal products to attract guests, such as toast, roast meat, chocolate or fruit. The extracted smell is integrated into the adhesive or coating, making the whole package full of attractive taste. In this way, a connection can be established between products and consumers

another purpose of sensory packaging is to maintain the integrity of the product. For example, the manufacturer of potato chips adds the flavor of potato chips to the packaging materials of the products to prevent the flavor of potato chips

another example of feeling packaging is a promotional campaign conducted by Coca Cola company. There is a winning message hidden in the shrink film label of the product. Consumers must buy Coca Cola products and store them in the refrigerator to know whether they have won the prize. This is because this label is printed with temperature sensitive ink and can only be detected by the human eye when the temperature drops to a certain extent

III. smart packaging

smart packaging can contain a large amount of product information inside the packaging. It combines the UK marking and monitoring system to form an extended tracking system to check product data. The monitoring sequence includes the detection of printing color and the advanced quality tracking information provided by the computer chip

intelligent packaging tracks and monitors products through internal sensing elements or advanced barcode and trademark information systems, and uses the principles of sensory packaging and functional packaging

the use of UV and EB inks can effectively avoid barcode deformation. For more accurate data detection, data chips or micro dot detection systems can also be used for control

intelligent packaging is mainly used to detect the deviation of packaging structure or materials. For example, check the density of the packaging paperboard material to determine whether the produced carton has enough stiffness to meet the needs of the product, such as ensuring that fruit juice or milk will not leak out. Using laser detection technology, many parameters of packaging can be measured, such as the microstructure of packaging printing ink

IV. flexographic printing

flexographic printing has the characteristics of stable ink color and high product repeatability. As the field color is easy to be affected by light and change the color phase, this process can simplify the control of toner and reduce the color drift. When printing on paperboard, it is necessary to monitor the surface tension and smoothness in order to achieve the desired sensory effect. If the surface of the product is not smooth enough, the effect of the product will be greatly reduced. The ideal printing process should ensure that the values of these packaged products have a certain repetition rate without change. Therefore, flexographic printing is a good choice

v. future packaging

in recent years, the market of various multi-functional packaging mentioned above has been expanding. Packaging is no longer limited to the products inside, but should have more functions. For example, a drink box designed by someone will become a beautiful coaster once it is unfolded

if new designs are applied to various intelligent packaging, higher grade interactive packaging products can be obtained. Packaging can deliver information and data to reduce overall costs. If advanced UV and EB inks are used or digital feedback information is used, there is no need to coat or film the packaging, and the original efficacy of the packaging will not be affected. Now consumers can realize the function of packaging itself, and not just focus on the product itself

information source: Duan Jun, Guangdong printing, 2004, issue 4

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