Inkjet printing has developed rapidly with the continuous development of computer control technology and packaging technology, and has now been applied to many modern factories and packaging automation lines. Advanced inkjet printing system, only when the operator presses the keyboard during operation, can change the fonts, symbols and various graphics and texts that need to be printed, not only can be used to print text and numbers, but also can choose to extend the bar code and users ( Customer) printing features of security signs. Inkjet printing has been widely used in the printing of packaging surfaces of various shapes and materials in the field, whether porous or non-porous, flat or curved, fabrics or ribbed surfaces such as plastic, cloth, paper, fur, ceramics , glass or metal.
In the past decade, digital printing has made great progress. Although the global economy has faced sluggishness for a period of time and the funds used for new technologies have been gradually reduced, ink-jet printing, which is called “universal†printing technology after screen printing, has never stopped.
The advantages are unmatched
Inkjet printing has developed rapidly with the continuous development of computer control technology and packaging technology, and has now been applied to many modern factories and packaging automation lines. Inkjet printing has the advantages that other printing methods cannot match, such as wide adaptability, high-speed intelligence, low cost, and no pollution. The operator can easily and quickly print the date, specifications, shelf life, quantity, bar code, etc. on the field (in motion) package. The ink-jet printed product dries quickly and can immediately enter the next process. Unlike traditional package printing, inkjet printing eliminates the need for plate making and specialized prepress assistive processes.
Advanced inkjet printing system, only when the operator presses the keyboard during operation, can change the fonts, symbols and various graphics and texts that need to be printed, not only can be used to print text and numbers, but also can choose to extend the bar code and users ( Customer) printing features of security signs.
The inkjet printing system has gone far beyond the scope of traditional printing. In addition to its black and white and color printing functions, it also has data processing and information storage capabilities. It can store hundreds of independent codes (digital, character sets, etc.) and nearly 10,000 characters by selecting (installing) a memory storage. It is connected to a computer, which allows you to record and report your work. When it is connected in series with the host, it can also print out the weight on the packaging (or other printed parts), record various data from satellite communications, draw atmospheric cloud maps, and so on.
Inkjet printing has been widely used in the printing of packaging surfaces of various shapes and materials in the field, whether porous or non-porous, flat or curved, fabrics or ribbed surfaces such as plastic, cloth, paper, fur, ceramics , glass or metal. It is also suitable for printing at various speeds, regardless of constant speed, variable speed or intermittent operation, and is most suitable for continuous non-stop operation of the packaging production line. Inkjet printing numbers, dates, etc., on continuous production lines are more economical and faster than other printed or pasted labels.
The principle is consistent with inkjet printers
The principles of inkjet printing, whether it is for inkjet printing in the packaging field or inkjet printing for the office sector, are basically the same.
Take the office inkjet printer as an example, introduce the principle of inkjet printing. There are two main types of inkjet printers on the market today: piezoelectric and bubble.
Piezo inkjet printers have ink nozzles at one end and piezoelectric materials (mostly lead-aluminum-titanium piezoelectric crystals) at the other end. After the ink is ejected, the ink cartridge is promptly filled in.
Bubble inkjet printers are equipped with a thermal resistor near the nozzle. The current pulse applied by the digital signal generates heat instantaneously (up to 100°C/s and temperature up to 280°C). The ink is quickly heated locally to make it A small amount of ink boils to form a bubble. With the high pressure of the bubble, the ink droplet is ejected from the nozzle and the bubble disappears and takes away heat. Ink is quickly filled in by the reservoir through capillary action.
The development of inkjet ink The principle of inkjet printing determines that ink jet ink has some special properties. First, the ink must have a certain viscosity, surface tension, pH and other physicochemical properties. Second, the ink should also have long-term storage stability, good continuous and intermittent printing performance, good color, brightness, purity and color saturation and water, light, weathering resistance. In addition, the composition of the ink cannot react chemically with the nozzle to avoid clogging of the nozzle; the ink is to be printed clearly and the drying speed is fast, but it cannot be evaporated too fast during the spraying process or when not in use; the image and text printed by the ink should be Neat, no proliferation, lack of ink, inequality and other phenomena. In order to meet the above performance requirements for ink jet inks, inkjet inks generally consist of solvents, colorants, surfactants, humectants, pH regulators and other additives.
The development of ink technology in our country is lagging behind
In the eyes of many people, inkjet printing is a new technology and it is synonymous with high technology. In fact, this is a misunderstanding in understanding. It is not difficult to find out the information carefully. The history of inkjet printing can be traced back more than 100 years ago: As early as 1878, inkjet printing technology was born.
Over the following 100 years, inkjet printing has continued to develop and some milestone technologies have emerged. In 1951, Siemens changed the ink-jet technology from liquid ink to ink droplets. Siemens applied for a patent for this technology. In 1964, Siemens developed a special device to control the size of ink droplets and the rate of ink ejection. This is also the embryonic form of inkjet printers/printers. In 1967, Hertz developed a printer using a continuous inkjet technology; in 1972, Siemens introduced a piezoelectric drop-on-demand inkjet printing technology; in 1982, after the development of Canon's bubble-type inkjet printer, the development of ink was advanced. It's faster.
In China, the further development of inkjet printing technology is still affected by some factors. According to relevant data, so far, China has not really developed a variety of inkjet inks with relatively stable performance. Therefore, the current domestic inkjet inks, especially color inkjet inks, are almost all dependent on imports. These imported jets Ink ink prices are quite high, seriously hindering the development of China's inkjet printing industry and related industries. Therefore, improving the performance of ink, especially the development of a good color, safety, and stable performance of the ink has become the most urgent problem in China.
Extended reading
Inkjet printing environmental protection is questioned
Digital printing, especially ink jet printing, has always been considered as an environmentally friendly printing process. Water-based inks are even more environmentally friendly products that are sought after by the industry and the media. However, the industry has recently expressed doubts about this view.
According to the report of Ingede (International Association of Deinking Industry), in 2010, some foreign companies producing high-quality recycled paper recycled some photo books printed on certain brand machines. As a result, the recycled pulp could not complete the deinking process. The company delayed production for eight hours, resulting in losses of more than 100,000 Euros. Since then, the excess product printed by the machine has been removed from the recycling chain of the printing paper by the paper mill and collected and processed separately.
Inge DE particularly emphasized that the report was not targeted at who, in fact, almost all products using water-based inks printed by ink-jet printing, there are some problems in recycling: paper mills recycle waste paper, ready to deinking to go When making new, clean white paper, dyes and fine pigments cannot be removed. As a result, paper fibers turn grey and paper mills need to fight for quality requirements. In particular, dye-based inks, this problem is more serious, because a little bit of dye can change the color of the pulp, such as a little red color can make the entire bleached pulp turn pink. According to Ingede's report, there is currently no dye-based ink that can be deinked in the recycling of paper. This type of ink is currently the mainstream product in the market, accounting for the vast majority of market share.
Green printing and environmental protection printing should be a complete system project, not a headache, and attention should be paid to the environmental performance and environmental protection indicators of a certain link while ignoring other links. If comprehensive consideration cannot be given to environmental protection, it may seem that it is environmental protection, but it is actually the transfer of pollution. Just like the use of dye-based water-based ink for printing, if the use of paper can not be recycled, then the resulting waste and the resulting non-environmental protection, far from offsetting the little advantage of VOC emissions from aqueous ink. . The final integrated result may instead be less environmentally friendly.
However, many manufacturing companies are aware of this problem and have begun to develop new technologies to make ink-jet ink easier to deink.
In the past decade, digital printing has made great progress. Although the global economy has faced sluggishness for a period of time and the funds used for new technologies have been gradually reduced, ink-jet printing, which is called “universal†printing technology after screen printing, has never stopped.
The advantages are unmatched
Inkjet printing has developed rapidly with the continuous development of computer control technology and packaging technology, and has now been applied to many modern factories and packaging automation lines. Inkjet printing has the advantages that other printing methods cannot match, such as wide adaptability, high-speed intelligence, low cost, and no pollution. The operator can easily and quickly print the date, specifications, shelf life, quantity, bar code, etc. on the field (in motion) package. The ink-jet printed product dries quickly and can immediately enter the next process. Unlike traditional package printing, inkjet printing eliminates the need for plate making and specialized prepress assistive processes.
Advanced inkjet printing system, only when the operator presses the keyboard during operation, can change the fonts, symbols and various graphics and texts that need to be printed, not only can be used to print text and numbers, but also can choose to extend the bar code and users ( Customer) printing features of security signs.
The inkjet printing system has gone far beyond the scope of traditional printing. In addition to its black and white and color printing functions, it also has data processing and information storage capabilities. It can store hundreds of independent codes (digital, character sets, etc.) and nearly 10,000 characters by selecting (installing) a memory storage. It is connected to a computer, which allows you to record and report your work. When it is connected in series with the host, it can also print out the weight on the packaging (or other printed parts), record various data from satellite communications, draw atmospheric cloud maps, and so on.
Inkjet printing has been widely used in the printing of packaging surfaces of various shapes and materials in the field, whether porous or non-porous, flat or curved, fabrics or ribbed surfaces such as plastic, cloth, paper, fur, ceramics , glass or metal. It is also suitable for printing at various speeds, regardless of constant speed, variable speed or intermittent operation, and is most suitable for continuous non-stop operation of the packaging production line. Inkjet printing numbers, dates, etc., on continuous production lines are more economical and faster than other printed or pasted labels.
The principle is consistent with inkjet printers
The principles of inkjet printing, whether it is for inkjet printing in the packaging field or inkjet printing for the office sector, are basically the same.
Take the office inkjet printer as an example, introduce the principle of inkjet printing. There are two main types of inkjet printers on the market today: piezoelectric and bubble.
Piezo inkjet printers have ink nozzles at one end and piezoelectric materials (mostly lead-aluminum-titanium piezoelectric crystals) at the other end. After the ink is ejected, the ink cartridge is promptly filled in.
Bubble inkjet printers are equipped with a thermal resistor near the nozzle. The current pulse applied by the digital signal generates heat instantaneously (up to 100°C/s and temperature up to 280°C). The ink is quickly heated locally to make it A small amount of ink boils to form a bubble. With the high pressure of the bubble, the ink droplet is ejected from the nozzle and the bubble disappears and takes away heat. Ink is quickly filled in by the reservoir through capillary action.
The development of inkjet ink The principle of inkjet printing determines that ink jet ink has some special properties. First, the ink must have a certain viscosity, surface tension, pH and other physicochemical properties. Second, the ink should also have long-term storage stability, good continuous and intermittent printing performance, good color, brightness, purity and color saturation and water, light, weathering resistance. In addition, the composition of the ink cannot react chemically with the nozzle to avoid clogging of the nozzle; the ink is to be printed clearly and the drying speed is fast, but it cannot be evaporated too fast during the spraying process or when not in use; the image and text printed by the ink should be Neat, no proliferation, lack of ink, inequality and other phenomena. In order to meet the above performance requirements for ink jet inks, inkjet inks generally consist of solvents, colorants, surfactants, humectants, pH regulators and other additives.
The development of ink technology in our country is lagging behind
In the eyes of many people, inkjet printing is a new technology and it is synonymous with high technology. In fact, this is a misunderstanding in understanding. It is not difficult to find out the information carefully. The history of inkjet printing can be traced back more than 100 years ago: As early as 1878, inkjet printing technology was born.
Over the following 100 years, inkjet printing has continued to develop and some milestone technologies have emerged. In 1951, Siemens changed the ink-jet technology from liquid ink to ink droplets. Siemens applied for a patent for this technology. In 1964, Siemens developed a special device to control the size of ink droplets and the rate of ink ejection. This is also the embryonic form of inkjet printers/printers. In 1967, Hertz developed a printer using a continuous inkjet technology; in 1972, Siemens introduced a piezoelectric drop-on-demand inkjet printing technology; in 1982, after the development of Canon's bubble-type inkjet printer, the development of ink was advanced. It's faster.
In China, the further development of inkjet printing technology is still affected by some factors. According to relevant data, so far, China has not really developed a variety of inkjet inks with relatively stable performance. Therefore, the current domestic inkjet inks, especially color inkjet inks, are almost all dependent on imports. These imported jets Ink ink prices are quite high, seriously hindering the development of China's inkjet printing industry and related industries. Therefore, improving the performance of ink, especially the development of a good color, safety, and stable performance of the ink has become the most urgent problem in China.
Extended reading
Inkjet printing environmental protection is questioned
Digital printing, especially ink jet printing, has always been considered as an environmentally friendly printing process. Water-based inks are even more environmentally friendly products that are sought after by the industry and the media. However, the industry has recently expressed doubts about this view.
According to the report of Ingede (International Association of Deinking Industry), in 2010, some foreign companies producing high-quality recycled paper recycled some photo books printed on certain brand machines. As a result, the recycled pulp could not complete the deinking process. The company delayed production for eight hours, resulting in losses of more than 100,000 Euros. Since then, the excess product printed by the machine has been removed from the recycling chain of the printing paper by the paper mill and collected and processed separately.
Inge DE particularly emphasized that the report was not targeted at who, in fact, almost all products using water-based inks printed by ink-jet printing, there are some problems in recycling: paper mills recycle waste paper, ready to deinking to go When making new, clean white paper, dyes and fine pigments cannot be removed. As a result, paper fibers turn grey and paper mills need to fight for quality requirements. In particular, dye-based inks, this problem is more serious, because a little bit of dye can change the color of the pulp, such as a little red color can make the entire bleached pulp turn pink. According to Ingede's report, there is currently no dye-based ink that can be deinked in the recycling of paper. This type of ink is currently the mainstream product in the market, accounting for the vast majority of market share.
Green printing and environmental protection printing should be a complete system project, not a headache, and attention should be paid to the environmental performance and environmental protection indicators of a certain link while ignoring other links. If comprehensive consideration cannot be given to environmental protection, it may seem that it is environmental protection, but it is actually the transfer of pollution. Just like the use of dye-based water-based ink for printing, if the use of paper can not be recycled, then the resulting waste and the resulting non-environmental protection, far from offsetting the little advantage of VOC emissions from aqueous ink. . The final integrated result may instead be less environmentally friendly.
However, many manufacturing companies are aware of this problem and have begun to develop new technologies to make ink-jet ink easier to deink.
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