Ultraviolet UV technology is gaining popularity in the packaging and printing industry. This technology is the fastest growing in the United States and is mainly focused on narrow-web web printing. In recent years, flexo printing mainly promotes the use of water-based inks. The promotion of UV inks is also intended to replace traditional solvent-based inks for flexo printing and provide an alternative to water-based inks. Since US California has confirmed that UV UV technology is a safe and environmentally friendly technology, UV UV printing has achieved greater development. For this reason, Honle UV American and Mark Andy have cooperated to develop ultraviolet UV printers, mainly targeting the film printing market. The internationally renowned Rochester Institute of Technology has been equipped with a Mark Andy flexographic printing machine dedicated to film printing, equipped with Honle UV drying device for training students and business operators. Honle UV is working hard to extend its UV UV dryers to wide-format flexo printers with a width of up to 40 inches. Air-cooled or water-cooled methods allow better distribution of input and output energy, improving drying efficiency and drying capacity. . Its modular design allows for quicker renewal of parts and printing at room temperature without the use of conventional chill rolls, making it ideal for film printing in food packaging.
Narrow web label printing is speeding up the use of UV-free UV inks. Taking into account the various surface properties of the substrate, cationic ultraviolet UV inks stand out. The drying is quicker and more thorough, and the printed ink layer has better resistance. However, complete drying will inevitably reduce the printing speed. Recently, ink suppliers in the European Union have stopped the supply of cationic inks for food and pharmaceutical packaging printing due to the detection of trace amounts of residual aniline from the outer packaging prints.
The newly introduced ultraviolet UV ink is not only used in UV printing, but also helps to increase the adhesive strength of the printing ink layer, and is less prone to migration and less occurrence of ink blocking failure. Such as AKZO Nobel launched a new generation of flexo, gravure type can be processed composite UV ink. Its newly developed Lamister 2000 has been rated as a low-risk, low-solvent UV-UV ink (below 5 ppm) that can be used in high-temperature aseptic packaging printing. Another Lamiline ink is a 100% VOC low-content water-based ink that fully meets the requirements of food regulations. AKZO's two new inks, VOC, are 50% lower than other inks, making them ideal for environmentally-friendly food packaging surface printing.
Among the various new flexo presses, a large proportion of the sleeve technology has been used. The latest development is the Novotec seamless sleeve and sleeve plate developed and produced by Polywest in collaboration with Saueressig. According to reports, this sleeve plate has a longer service life than the photosensitive resin plate. The popularization and promotion of the sleeve technology, first of all, is the market demanding higher printing quality and fast conversion of India and India, and secondly, people have gradually accepted this new technology. Now sleeve press technology has been applied to 60 to 70% of flexo presses introduced in the international flexo press market. The Novotec sleeve is a famous brand in Europe and has gradually entered the North American market.
For plate processing of printing plate sleeves, MacDermid Graphic Arts of Atlanta, United States, introduced a new Flexo-Light 60 ASL, a flexo plate printing machine. It uses computer-to-sleeve plate CTPlate technology to automatically expose, rinse, dry and make exposures on sleeve plates. The device is controlled by a monitor and can process 11 photosensitive resin plates at a time.
But the company that is really suitable for flexographic printing CTPlate technology and has achieved success is the famous DuPont company. Together with other manufacturers, they have developed DuPont/Barco's Cyrel digital CDI imaging technology that can transfer digital information data directly to laser-sensitive printing plates. At present, there are more than 140 CDI imaging equipments in the world for the production and processing of sleeves and plates, mainly in Europe, followed by North America.
Creo Products Inc. and Scitex Corp., which merged last year with CreoScitex, have also marketed the ThermoFlex brand of flexographic imaging systems. It uses 830 nm laser thermal imaging technology and external drum processing methods, and these technologies are all mature technologies in their respective brands. The wide-format ThermoFlex 5280 (52 in. x 80 in.) sleeve plate process involves sliding the sleeve onto the ThermoFlex plate cylinder spindle and automatically exposing it at 2 in./min. Its sleeve material comes from Asahi, BASF and DuPont.
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Hell Gravure Systems, a member of the famous Heidelberg Group, also introduced a new generation of digital flexo HelioFlex F 2000 CTP imaging system. With the help of the proven technology of the HelioKlischograph gravure printing machine, it uses eight infrared lasers with a wavelength greater than 1 000 nm to obtain better light focusing and compensate for the small unevenness of the printing plate surface. Its maximum processing area is 1 600 mm × 1 200 mm, and the sleeve plate is fixed by the vacuum device inside the roller. The symmetrical design of the system ensures that all sleeves can be quickly and easily handled. Its current plate material supplier is BASF.
Water As customers think that the printing quality requirements of text and lines are more suitable for flexographic printing, we hope to shift more towards flexographic printing, and the lower cost of prepress for flexographic printing, which has led many printers to start printing on the packaging printing market. Learn more and more deeply.
DuPont's complementary products include the Cyrel FAST plate washing system. Due to the use of thermal-type printing plates, there is no contamination of the chemical solvents in the printing plate. It can reduce the original 4 hour flushing time to less than 1 hour.
Quality control in flexographic printing plays an important role, and quality control techniques used in other printing processes are also suitable for flexo printing. Centurfax has introduced the FlexoDot, a point-of-spot technology that uses modern surface inspection technology to directly observe the surface conditions of the printing plate, such as the extent to which the plate has been exposed to corrosion, and whether it is under-etched or over-etched. The percentage of outlets can be read out. In the printing section, various roll paper tape detection devices and printing failure detection devices have been introduced. For example, the Windmoeller & Hoelscher Novoflex and Fischer & Krecke Flexpress 16S flexographic presses are equipped with Eltromat's Meshcon-FD products. In addition to the web strobe viewer, there are automatic circumferential and axial register control systems.
On the CI type flexo press, due to the special structure of the CI flexo press and the short paper path design between the color groups, a high register accuracy can be ensured, so the color registration control problem was not generally considered before. However, if an automated register control system is used, the preparation time and waste reduction can be greatly reduced. The method is to use the camera to observe the register circular mark of the size of nearly 2 mm on the printed product, and feed back the error information to the Meshcon to timely adjust the register. This automated register control system reduces web start-ups to 100 meters or less.
Using AVT's pRegister closed-loop register control system on the CI press, the consumption after starting can be reduced from the original 500 to 1 000 meters to only 50 meters, and the ±5 mm registration error can be quickly corrected after the machine starts. Registration accuracy is controlled within 15 μm. PrintVision/Argus's quality assurance and process control workflow solutions are primarily used for the automatic detection of printing faults and control of the printing process, and are equipped with larger displays (19 in.) and higher-end computers for this purpose.
Post-package printing has always played a key role in flexo printing. For printers who are considering moving from sheetfed to flexo web printing, post-press processing will have to be seriously considered. The latest Tamarack Specialist 300, which can be processed on-line or off-line, is a post-processing facility designed for small and medium sized printers in the field of commercial paper, mailing, packaging, labels, and cardboard packaging printing. It adopts a mature lamination and die cutting technology, which can effectively process feedback cards, membership cards, integrated invoices, and packaged bar codes. A major advancement in this equipment is that it will not damage laminated products during processing.
Looking at the changes in flexographic printing in recent years, the cause is market-oriented development first, followed by the development of printing technology. Due to technical innovations at all stages of prepress, printing and postpress processing, new technologies such as digital plates, CDI imaging technology, sleeve technology, shaftless drive technology, UV drying technology, automatic register control technology and on-line post-press processing are being developed. With popularization and development, flexographic printing is undergoing tremendous changes and is increasingly becoming the main processing technology for packaging and printing. This should cause us to pay enough attention.
Narrow web label printing is speeding up the use of UV-free UV inks. Taking into account the various surface properties of the substrate, cationic ultraviolet UV inks stand out. The drying is quicker and more thorough, and the printed ink layer has better resistance. However, complete drying will inevitably reduce the printing speed. Recently, ink suppliers in the European Union have stopped the supply of cationic inks for food and pharmaceutical packaging printing due to the detection of trace amounts of residual aniline from the outer packaging prints.
The newly introduced ultraviolet UV ink is not only used in UV printing, but also helps to increase the adhesive strength of the printing ink layer, and is less prone to migration and less occurrence of ink blocking failure. Such as AKZO Nobel launched a new generation of flexo, gravure type can be processed composite UV ink. Its newly developed Lamister 2000 has been rated as a low-risk, low-solvent UV-UV ink (below 5 ppm) that can be used in high-temperature aseptic packaging printing. Another Lamiline ink is a 100% VOC low-content water-based ink that fully meets the requirements of food regulations. AKZO's two new inks, VOC, are 50% lower than other inks, making them ideal for environmentally-friendly food packaging surface printing.
Among the various new flexo presses, a large proportion of the sleeve technology has been used. The latest development is the Novotec seamless sleeve and sleeve plate developed and produced by Polywest in collaboration with Saueressig. According to reports, this sleeve plate has a longer service life than the photosensitive resin plate. The popularization and promotion of the sleeve technology, first of all, is the market demanding higher printing quality and fast conversion of India and India, and secondly, people have gradually accepted this new technology. Now sleeve press technology has been applied to 60 to 70% of flexo presses introduced in the international flexo press market. The Novotec sleeve is a famous brand in Europe and has gradually entered the North American market.
For plate processing of printing plate sleeves, MacDermid Graphic Arts of Atlanta, United States, introduced a new Flexo-Light 60 ASL, a flexo plate printing machine. It uses computer-to-sleeve plate CTPlate technology to automatically expose, rinse, dry and make exposures on sleeve plates. The device is controlled by a monitor and can process 11 photosensitive resin plates at a time.
But the company that is really suitable for flexographic printing CTPlate technology and has achieved success is the famous DuPont company. Together with other manufacturers, they have developed DuPont/Barco's Cyrel digital CDI imaging technology that can transfer digital information data directly to laser-sensitive printing plates. At present, there are more than 140 CDI imaging equipments in the world for the production and processing of sleeves and plates, mainly in Europe, followed by North America.
Creo Products Inc. and Scitex Corp., which merged last year with CreoScitex, have also marketed the ThermoFlex brand of flexographic imaging systems. It uses 830 nm laser thermal imaging technology and external drum processing methods, and these technologies are all mature technologies in their respective brands. The wide-format ThermoFlex 5280 (52 in. x 80 in.) sleeve plate process involves sliding the sleeve onto the ThermoFlex plate cylinder spindle and automatically exposing it at 2 in./min. Its sleeve material comes from Asahi, BASF and DuPont.
I
Hell Gravure Systems, a member of the famous Heidelberg Group, also introduced a new generation of digital flexo HelioFlex F 2000 CTP imaging system. With the help of the proven technology of the HelioKlischograph gravure printing machine, it uses eight infrared lasers with a wavelength greater than 1 000 nm to obtain better light focusing and compensate for the small unevenness of the printing plate surface. Its maximum processing area is 1 600 mm × 1 200 mm, and the sleeve plate is fixed by the vacuum device inside the roller. The symmetrical design of the system ensures that all sleeves can be quickly and easily handled. Its current plate material supplier is BASF.
Water As customers think that the printing quality requirements of text and lines are more suitable for flexographic printing, we hope to shift more towards flexographic printing, and the lower cost of prepress for flexographic printing, which has led many printers to start printing on the packaging printing market. Learn more and more deeply.
DuPont's complementary products include the Cyrel FAST plate washing system. Due to the use of thermal-type printing plates, there is no contamination of the chemical solvents in the printing plate. It can reduce the original 4 hour flushing time to less than 1 hour.
Quality control in flexographic printing plays an important role, and quality control techniques used in other printing processes are also suitable for flexo printing. Centurfax has introduced the FlexoDot, a point-of-spot technology that uses modern surface inspection technology to directly observe the surface conditions of the printing plate, such as the extent to which the plate has been exposed to corrosion, and whether it is under-etched or over-etched. The percentage of outlets can be read out. In the printing section, various roll paper tape detection devices and printing failure detection devices have been introduced. For example, the Windmoeller & Hoelscher Novoflex and Fischer & Krecke Flexpress 16S flexographic presses are equipped with Eltromat's Meshcon-FD products. In addition to the web strobe viewer, there are automatic circumferential and axial register control systems.
On the CI type flexo press, due to the special structure of the CI flexo press and the short paper path design between the color groups, a high register accuracy can be ensured, so the color registration control problem was not generally considered before. However, if an automated register control system is used, the preparation time and waste reduction can be greatly reduced. The method is to use the camera to observe the register circular mark of the size of nearly 2 mm on the printed product, and feed back the error information to the Meshcon to timely adjust the register. This automated register control system reduces web start-ups to 100 meters or less.
Using AVT's pRegister closed-loop register control system on the CI press, the consumption after starting can be reduced from the original 500 to 1 000 meters to only 50 meters, and the ±5 mm registration error can be quickly corrected after the machine starts. Registration accuracy is controlled within 15 μm. PrintVision/Argus's quality assurance and process control workflow solutions are primarily used for the automatic detection of printing faults and control of the printing process, and are equipped with larger displays (19 in.) and higher-end computers for this purpose.
Post-package printing has always played a key role in flexo printing. For printers who are considering moving from sheetfed to flexo web printing, post-press processing will have to be seriously considered. The latest Tamarack Specialist 300, which can be processed on-line or off-line, is a post-processing facility designed for small and medium sized printers in the field of commercial paper, mailing, packaging, labels, and cardboard packaging printing. It adopts a mature lamination and die cutting technology, which can effectively process feedback cards, membership cards, integrated invoices, and packaged bar codes. A major advancement in this equipment is that it will not damage laminated products during processing.
Looking at the changes in flexographic printing in recent years, the cause is market-oriented development first, followed by the development of printing technology. Due to technical innovations at all stages of prepress, printing and postpress processing, new technologies such as digital plates, CDI imaging technology, sleeve technology, shaftless drive technology, UV drying technology, automatic register control technology and on-line post-press processing are being developed. With popularization and development, flexographic printing is undergoing tremendous changes and is increasingly becoming the main processing technology for packaging and printing. This should cause us to pay enough attention.
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