Application of Digital Printing Technology in Carton Carton Printing

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Digital printing technology refers to the use of digital technology to personalize the file and use the prepress publishing system to transfer the graphic directly to the digital printing machine through the network, printing the final finished product. With the increasing awareness of personalized products, digital printing technology has become more and more widely used in daily life and production. Especially in recent years, the application of this technology in carton and carton printing has opened up a new space for its own development.

Development status

Digital printing investors are now interested in packaging printing because it has a vast market and digital technology can provide unusual value. Mr. Venkat Punuhtham of Kodak explained: “The digital printing market is part of Kodak’s overall strategy. It is not that a Kodak digital service provider is interested in the packaging field. All digital printers are moving into this area and are all occupying this market.” Printers have begun to expand digital printing technology in the packaging field, but before the technology can really penetrate the market they must make substantial improvements to their equipment to meet the packaging printing.

The application of digital printing in packaging means the breadth of the printing materials, which includes high-weight materials such as high-volume paper boxes and carton materials. For example, in the printing ability of white ink or printing various tone colors, these needs are mainly appeared in packaging printing, but are rarely used in other printing methods. In the initial development, it was precisely these factors that limited the application of digital printing in packaging. In addition, digital printing must overcome many problems such as printing density and gloss because of its own characteristics. Digital press manufacturers are developing R&D for the following three key factors: the feasibility, functionality, and print quality.

With the gradual progress of technology, we have now been delighted to see many of the digital technologies used in packaging printing. For example, printing of small batches of short-cut packaging products (paper bags, cartons, film packaging products, etc.), proofing of packaging design boxes, printing of corrugated cardboard, printing of personalized packaging products, printing of packaging products with variable data, and the like. Digital printing has now grown to a maximum of 7 color prints, especially for spot and special color labels and packaging printing such as corporate spot colors or spot colors. Exquisite print quality up to 2400dpi, 230 lines / inch high-precision images to ensure that the label and packaging are exceptionally beautiful, patented electronic ink makes the printed image more sharp, clear dots without blurring edges and proliferation and can guarantee the color of labels and packaging lasting. Some digital printers can quickly and steadily complete high-quality printing, and can also integrate glazing, coating, indentation, die-cutting, molding and other processes into one, and can realize personalized on-demand production of such machines. The high degree of stable quality and automatic line-up of type quality saves the time for job preparation and speeds up delivery.

Many digital printing users now own digital printing machines for corrugated printing, such as six-color direct printing on corrugated board (except yellow, magenta, and black, and two spot colors: light blue and light magenta). These to provide customers with smaller batches of packaging or test packaging to help them more targeted marketing and provide users with tailor-made products to promote their POP program.

Application examples

In order to help packaging and printing companies respond to market demands and find new profit growth points, various printing equipment manufacturers are competing to develop digital printing machines with their own advantages. Currently, many internationally renowned manufacturers have launched digital printing systems for the packaging and printing industry. And get some success. Among them, inkjet digital printing has developed most rapidly.

1, Xeikon Corporation

Xeikon's color digital printers for the packaging and printing industry mainly include the DCP 320S, DCP 500SP and DCP 500SF. The Xeikon DCP 500SP digital printers are mainly used for the folding and printing of paper boxes, paper cups and liquid packaging. The printing speed is 63. Zhang/hour, resolution 600dpi.
Xeikon's proprietary magnetic particle imaging technology, high-quality male netting technology, powerful color generation tools, and precise register control are the basis for the excellent print quality of its digital presses.

2. In the field of corrugated cardboard printing, it is still the most decisive factor in the development of digital inkjet technology.

The inkjet printer consists of a number of nozzles in a dot matrix structure. By receiving the layout information of the computer, the ink is ejected from a very fine nozzle and the electric field is used to control the direction of the inkjet jet to generate images and graphics on the paper.

Corrugated cartons have become one of the means for personalized packaging of goods and for the promotion of corporate image. Short-run printing and display with corrugated papers have been widely used in foreign countries. There is still a certain gap in this respect.

Saeangelics has been a leader in the digital inkjet printing industry and has applied its unique Aprion(R) array image color inkjet technology to the corrugated cardboard printing sector. It has launched a wide-format corrugated board digital printing solution—Angel Corjeto CORJET. The core is a piezoelectric inkjet head that can be arranged into various arrays and combinations of Aprion Technology patented technology. The nozzle consists of 512 nozzles, which not only provides speed, mass, and stability, but also ensures that the printing process can take only 5 minutes, the production speed of the batch can reach 79/hour, and the thickness of the printing corrugated board can reach lOmm. With a maximum web size of 1.55mx 3.2m, a full-format print of 29 sheets can be printed at a print rate of 600dpi at 150m2=/ and a "two-pass mode". The entire printing process, from the loading machine providing the printing paper to the air dryer and finally the automatic unloader, is fully automated.

3, Agfa the, fa dory inkjet digital printing machine

Agfa's subsidiary, Dotri, has extensive experience in the development of digital printing equipment. It is committed to researching digital printing solutions that can meet industrial applications and has developed 7 industry-leading SPICE (Single Pass Inkjet Colour Engine) technologies. SPICE technology adopts piezoelectric on-demand ink-jet printing. The ink-jet heads are fixed during printing and the printing materials move, which improves the stability and reliability of the equipment and prolongs the service life of the equipment. The factory digital printing machine's adaptability to substrates includes a wide variety of paper and synthetic materials, capable of printing BOPP as thin as 30 μm and cardboard as 450 g/m2.

4, post-processing technology

In packaging printing, post-press processing and handling issues such as glazing, hot stamping, die-cutting, creasing, gluing, etc. are often involved. This requires digital press manufacturers to take this into consideration. Some companies are at the forefront of post-press technology. For example, Esko's Kongsberg AL series box maker can handle a wide variety of corrugated cardboard, folded paper boxes, and other materials such as foam boards and sheets. On this basis, Esko introduced the Kongsberg Digital Paper Processing Center (DCM) for packaging and POP industry at Drupa 2004, which can be used for post-print processing of 10-400 sheets of corrugated cardboard of different sizes.

Difficulties faced

Digital printing in foreign countries has made great progress in the packaging and printing industry. However, in China, although the application of digital printing in the field of packaging and printing has begun to take shape, the status of application is not satisfactory. The main constraints include the following: Several aspects:

1, traditional concepts affect the development of digital printing

Due to the influence of traditional printing, packaging and printing companies, product manufacturers, and consumers lack sufficient knowledge and understanding of digital printing and digital print, and even some misunderstandings always compare the price of conventional printing with digital printing. Then we must further strengthen the work of market advocacy and guidance.

2. The large investment cost of digital printing deters investment companies

At present, the price of digital printers is generally too high. Its high prices of several tens of thousands or even millions of dollars have discouraged many packaging and printing companies. At present, it has not yet formed a large enough scale and influence. Domestic packaging and printing companies lack sufficient confidence and confidence in the market. Most people still hold a wait-and-see attitude toward the future of digital printing in the packaging field, which largely hinders the development of digital printing in the domestic packaging and printing industry.

3. Consumers are sensitive to price and have no knowledge of digital printing technology

On the other hand, the price of digital printing products is still relatively high relative to the domestic consumers' affordability and consumption levels. Many shops that specialize in digital printing place their major customers in large companies and their choice of sources tends to be “more than one copy.” For simple printing of ordinary customers, the price is still very expensive because the overall cost is difficult to reduce. In addition, customers have not learned enough about digital printing technology to know little about their applications in cardboard and paper boxes.

4, printing quality basin needs to be further improved

Although the quality of digital printing has greatly improved, there is still a certain gap compared with traditional prints, especially in terms of density, gloss, and color. Under the condition that the customer has a very high requirement for the printing quality of the product packaging, the current digital printing quality cannot fully meet the requirements.

5, digital printing press and post-press processing issues

The digital presses used by many companies today can only achieve print functions without post-processing functions. If the digital printing machine has a powerful online processability, the paperboard carton post-processing and processing and forming system will be integrated into one, and the speed of individualized press production will be greatly accelerated, making it more convenient for users, saving the construction period and speeding up the delivery. .

In addition, many packaging and printing companies lack sufficient experience in the cooperation of digital printing and post-press processing. It takes a certain amount of time and effort to understand, familiarize with and master.

Domestic Market Analysis and Future Development Trends

The current state of application of digital printing as described above is mainly focused on inkjet printing methods. As an alternative to digital printing, electrophotographic technology can gradually develop powders for carton and paperboard in the future with Xerox and Cromatics. Kefa) mainly. Xerox's largest print format is SRA3, Cromapess format width is 32cm and SOcm. The maximum length of the output is llmo ink, which is based on HP Indio products. E-Print (Indigo) series uses liquid toner. From a technical point of view, the toner needs to be melted on paper. Therefore, the basic heating temperature is about 180°C. However, ink printing does not require such heating. It only needs to be dried, and from this comparison, machines using ink technology are more suitable for the improvement of the equipment and can be developed for the printing of cardboard and carton.

At present, many printing companies choose digital printing technology because they see the whole world is developing in a fast and personalized way. This is a general trend. For large-scale product suppliers and consumer goods production companies, digital printing is their inevitable choice in order to subdivide the market into smaller and more regionalized areas. It is believed that the application of digital printing technology in cartons and cartons will go further and further.

Reproduced from: newmaker

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