The application of marking technology is gradually deepening into every corner, from heavy machinery to small wires, which are inseparable from product identification. This technology is also widely used in plastic packaging containers, plastic film, plastic pipes, wire and cable, plastic parts and other products.
Type of coding technology
At present, the coding technology mainly includes inkjet printing technology and laser coding technology.
Inkjet printing technology
Inkjet printing technology is also called non-contact printing. According to the working principle of the printer, it can be divided into continuous jet printer and on-demand ink printer.
The continuous jet type printer is abbreviated as CIJ type, which continuously ejects ink from a single nozzle and breaks after the crystal is oscillated to form an ink dot; the ink dot is scanned and printed on the surface of the moving object after being charged and deflected by high pressure. Most industrial inkjet systems use CIJ technology at speeds of up to 1,000 feet per minute, much faster than on-demand inkjet printers, but the quality of the image is lower than the latter technique. Manufacturers of CIJ printing equipment such as Domino and Videojet are leaders in this field.
The on-demand inkjet printer is referred to as the DOD type. The nozzle of the ink supply system is composed of a plurality of high-precision valves. When the word is sprayed, the corresponding valve of the font is quickly opened and closed, and the ink is ejected by the constant internal pressure. The surface forms a character or graphic. A digital signal produces a drop of ink on the paper, rather than an ink stream, which produces an effect close to photographic quality. The DOD prints at speeds between 100 feet and 300 feet per minute. Many companies are currently developing high-speed DOD printing equipment that can be used for packaging purposes.
Laser coding technology
Laser coding technology is a more advanced technology than ink coding technology. This technique primarily achieves coding by cauterization and etching. Cauterization, that is, the laser emits enough energy to remove the surface of the plastic material, such as the ink on the surface of the printed package. Etching, that is, using a suitable laser energy to partially melt the surface of the plastic material to form a groove. The extremely fine laser light speed after focusing is like a tool, which can remove the surface material of the object point by point without mechanical compression or mechanical stress, so it will not damage the processed object.
In addition to the general information annotation function, the anti-counterfeiting function of laser coding technology is more significant. The application of laser coding technology in the Chinese market has just begun, but it will win a broader market due to its high reliability, low operating cost, easy installation and operation, and precise bar code printing.
In this field, Shenzhen Dazu Laser Technology Co., Ltd. is one of the few companies in the forefront in China. At present, the company's laser marking machines mainly include YAG series and CO2 series, which are suitable for marking various materials such as ABS material, epoxy resin, polyvinyl chloride, bulletproof rubber, polyurethane and glass.
Application in the plastics industry
Compared with ordinary printing methods such as pad printing or silk screen printing, the printer has the advantages of non-contact printing, high speed and high efficiency, low cost, instant printing, programmable and can change the printing content at any time. The favor of product suppliers.
Packaging Materials
Today, plastics have become one of the major packaging materials and are widely used in the packaging of food, beverage, tobacco and cosmetics products. Most of these plastic materials are PVC, PE and PET, which are the main printing materials in the packaging field.
Packaging materials require that the coding effect be not only clear, but also aesthetically pleasing. Non-contact inkjet printers and lasers are excellent in inkjet printers because they do not touch the surface of the product during the coding process, so whether it is a regular or irregular surface, whether it is a circular, square or rugged surface, the printer can be excellent. Complete the task. In addition, the plastic film is used in a large amount in the packaging of the product. If subjected to extrusion, the film will be damaged to a certain extent, directly affecting the aesthetics of the package. The use of non-contact coding technology, there is no such worry. For example, Dazu Laser's semiconductor pump laser marking machine (DP-R75) can directly mark the plastic film wrapped in cigarettes without harming the film.
Since food, beverages, tobacco and other products are closely related to life, the packaging materials have relatively high requirements for hygiene. Since the laser machine does not use ink for marking, it can ensure the cleanliness of the product and the production environment. Therefore, the application of laser marking technology on packaging materials has received great attention. Domino recently introduced the S200B line laser printer with PET. At present, laser marking machine companies on the market can provide marking schemes for PET materials. However, since the PET materials themselves are relatively transparent, when the laser is hit on the surface and cannot be discolored, the effect is not significant and difficult to identify. The S200B type line laser jet printer combines the "blue tube technology" with the laser jet printer to make the color of the coded white white, showing a crystal texture, and the effect is clear.
Plastic pipe
There are many products in the plastic pipe industry, including drain lines, aluminum-plastic pipes, composite pipes and rubber hoses.
Some of these pipes are in a high temperature and high heat environment for a long time, and require their own identification to have strong resistance to sunlight and high temperature, that is, to ensure the long-termity of the logo. In addition, the high extrusion rate of plastic pipes requires that the coding speed be synchronized, while the tiny pipes require flexible and sophisticated coding techniques.
US Videojet equipment is more suitable for these special requirements. Its small character ink jet printer series is suitable for operation in high temperature and high heat production environment. The code is clear, stable and wear resistant. The printed characters can be as small as 0.8 mm. At the same time, the printer has automatic meter counting function, which can print continuously and instantly without affecting the continuous operation of the entire production process.
Wire and Cable
The application of coding technology in the wire and cable industry is also very extensive. Cable and wire products are difficult to identify brands or trademarks from the outside. By printing product specifications and factory name, you can quickly identify genuine products.
The requirements for marking of this product are: easy to distinguish, not easy to wear, and have good chemical resistance and UV resistance. There are a lot of coding equipment on the market that can meet these conditions. Moreover, it allows for very easy angle and time of printing: it can be a 360 degree print angle, or it can be printed on the bottom, side or top of the product; whether it is in the extrusion of raw materials or in various cables. When entangled, it can be printed either on a high-speed line or on a separate pallet.
Requirements for ink
Due to the high speed, high efficiency and low cost of inkjet printing equipment, the application in the market is far more than the laser coding technology. For inkjet printing equipment, the effect of printing is closely related to the performance of the ink. Today, consumers demand faster drying, better anti-counterfeiting performance and more environmentally friendly inks.
Fast drying
The production speed of the production line is constantly increasing, and the cooperation of quick-drying ink is required. For example, in the processing and production of cigarette packets, the ink is dried immediately after being printed on the surface of the product, and firmly adhered to the surface of the product, and will not be printed on other surfaces and the surface of the soiled object, so that each one is sprayed. The logo of the printed product is clear, complete and easy to distinguish, and does not affect the entire production process, effectively reducing the downtime.
Anti-counterfeiting
The anti-counterfeiting function of the product is more and more valued by the merchants. As the carrier of the product identification, the ink also assumes this important task. An ultraviolet visible anti-counterfeiting ink that appears on the market has good anti-counterfeiting properties. This ink does not show up under normal light and can only be seen under UV light.
There are many researches on small-sized anti-counterfeit invisible inks in China, but there are few large-scale anti-counterfeiting inks. Beijing Saiteng Power Technology Co., Ltd. developed a handheld inkjet printer, which used a large-character anti-counterfeit invisible ink to make the role of the handheld printer to the extreme. The large-word anti-counterfeit invisible ink not only has high filtering precision, fast drying speed, strong adhesion, but also product printing and printing, and has special anti-counterfeiting function for displaying blue light under ultraviolet irradiation.
Environmental protection
Environmental protection is also a topic of great concern to the public. Inks and solvents are highly volatile substances that produce more chemically toxic residues and pollute the environment. Especially for food packaging, the environmental friendliness of ink is more important, and its chemical composition and odor may penetrate into food through film and packaging, endangering human health. In order to prevent this aftermath, the United States even prohibits the use of inkjet printers on the inner packaging of medicines. At present, companies such as Domino and Videojet are very concerned about the development of environmentally friendly inks.
In addition, in the field of food packaging, some foods also require the ink to be edible to be printed directly on the surface of the food or on the inner packaging. For foods that need to be refrigerated, the logo is required to remain unchanged after the food has been chilled at around 0 °C, so the low temperature resistance of the ink is also very important.
At present, the development of China's logo industry is in the ascendant, the growth rate is very high, and the market's requirements for logo technology are also changing. The reliability and stability of the printer equipment will be an important trend in the future development of technology. The speed of domestic plastic product production lines is getting higher and higher, and the market for printing inkjet printers with fast performance is undoubtedly broader.
Type of coding technology
At present, the coding technology mainly includes inkjet printing technology and laser coding technology.
Inkjet printing technology
Inkjet printing technology is also called non-contact printing. According to the working principle of the printer, it can be divided into continuous jet printer and on-demand ink printer.
The continuous jet type printer is abbreviated as CIJ type, which continuously ejects ink from a single nozzle and breaks after the crystal is oscillated to form an ink dot; the ink dot is scanned and printed on the surface of the moving object after being charged and deflected by high pressure. Most industrial inkjet systems use CIJ technology at speeds of up to 1,000 feet per minute, much faster than on-demand inkjet printers, but the quality of the image is lower than the latter technique. Manufacturers of CIJ printing equipment such as Domino and Videojet are leaders in this field.
The on-demand inkjet printer is referred to as the DOD type. The nozzle of the ink supply system is composed of a plurality of high-precision valves. When the word is sprayed, the corresponding valve of the font is quickly opened and closed, and the ink is ejected by the constant internal pressure. The surface forms a character or graphic. A digital signal produces a drop of ink on the paper, rather than an ink stream, which produces an effect close to photographic quality. The DOD prints at speeds between 100 feet and 300 feet per minute. Many companies are currently developing high-speed DOD printing equipment that can be used for packaging purposes.
Laser coding technology
Laser coding technology is a more advanced technology than ink coding technology. This technique primarily achieves coding by cauterization and etching. Cauterization, that is, the laser emits enough energy to remove the surface of the plastic material, such as the ink on the surface of the printed package. Etching, that is, using a suitable laser energy to partially melt the surface of the plastic material to form a groove. The extremely fine laser light speed after focusing is like a tool, which can remove the surface material of the object point by point without mechanical compression or mechanical stress, so it will not damage the processed object.
In addition to the general information annotation function, the anti-counterfeiting function of laser coding technology is more significant. The application of laser coding technology in the Chinese market has just begun, but it will win a broader market due to its high reliability, low operating cost, easy installation and operation, and precise bar code printing.
In this field, Shenzhen Dazu Laser Technology Co., Ltd. is one of the few companies in the forefront in China. At present, the company's laser marking machines mainly include YAG series and CO2 series, which are suitable for marking various materials such as ABS material, epoxy resin, polyvinyl chloride, bulletproof rubber, polyurethane and glass.
Application in the plastics industry
Compared with ordinary printing methods such as pad printing or silk screen printing, the printer has the advantages of non-contact printing, high speed and high efficiency, low cost, instant printing, programmable and can change the printing content at any time. The favor of product suppliers.
Packaging Materials
Today, plastics have become one of the major packaging materials and are widely used in the packaging of food, beverage, tobacco and cosmetics products. Most of these plastic materials are PVC, PE and PET, which are the main printing materials in the packaging field.
Packaging materials require that the coding effect be not only clear, but also aesthetically pleasing. Non-contact inkjet printers and lasers are excellent in inkjet printers because they do not touch the surface of the product during the coding process, so whether it is a regular or irregular surface, whether it is a circular, square or rugged surface, the printer can be excellent. Complete the task. In addition, the plastic film is used in a large amount in the packaging of the product. If subjected to extrusion, the film will be damaged to a certain extent, directly affecting the aesthetics of the package. The use of non-contact coding technology, there is no such worry. For example, Dazu Laser's semiconductor pump laser marking machine (DP-R75) can directly mark the plastic film wrapped in cigarettes without harming the film.
Since food, beverages, tobacco and other products are closely related to life, the packaging materials have relatively high requirements for hygiene. Since the laser machine does not use ink for marking, it can ensure the cleanliness of the product and the production environment. Therefore, the application of laser marking technology on packaging materials has received great attention. Domino recently introduced the S200B line laser printer with PET. At present, laser marking machine companies on the market can provide marking schemes for PET materials. However, since the PET materials themselves are relatively transparent, when the laser is hit on the surface and cannot be discolored, the effect is not significant and difficult to identify. The S200B type line laser jet printer combines the "blue tube technology" with the laser jet printer to make the color of the coded white white, showing a crystal texture, and the effect is clear.
Plastic pipe
There are many products in the plastic pipe industry, including drain lines, aluminum-plastic pipes, composite pipes and rubber hoses.
Some of these pipes are in a high temperature and high heat environment for a long time, and require their own identification to have strong resistance to sunlight and high temperature, that is, to ensure the long-termity of the logo. In addition, the high extrusion rate of plastic pipes requires that the coding speed be synchronized, while the tiny pipes require flexible and sophisticated coding techniques.
US Videojet equipment is more suitable for these special requirements. Its small character ink jet printer series is suitable for operation in high temperature and high heat production environment. The code is clear, stable and wear resistant. The printed characters can be as small as 0.8 mm. At the same time, the printer has automatic meter counting function, which can print continuously and instantly without affecting the continuous operation of the entire production process.
Wire and Cable
The application of coding technology in the wire and cable industry is also very extensive. Cable and wire products are difficult to identify brands or trademarks from the outside. By printing product specifications and factory name, you can quickly identify genuine products.
The requirements for marking of this product are: easy to distinguish, not easy to wear, and have good chemical resistance and UV resistance. There are a lot of coding equipment on the market that can meet these conditions. Moreover, it allows for very easy angle and time of printing: it can be a 360 degree print angle, or it can be printed on the bottom, side or top of the product; whether it is in the extrusion of raw materials or in various cables. When entangled, it can be printed either on a high-speed line or on a separate pallet.
Requirements for ink
Due to the high speed, high efficiency and low cost of inkjet printing equipment, the application in the market is far more than the laser coding technology. For inkjet printing equipment, the effect of printing is closely related to the performance of the ink. Today, consumers demand faster drying, better anti-counterfeiting performance and more environmentally friendly inks.
Fast drying
The production speed of the production line is constantly increasing, and the cooperation of quick-drying ink is required. For example, in the processing and production of cigarette packets, the ink is dried immediately after being printed on the surface of the product, and firmly adhered to the surface of the product, and will not be printed on other surfaces and the surface of the soiled object, so that each one is sprayed. The logo of the printed product is clear, complete and easy to distinguish, and does not affect the entire production process, effectively reducing the downtime.
Anti-counterfeiting
The anti-counterfeiting function of the product is more and more valued by the merchants. As the carrier of the product identification, the ink also assumes this important task. An ultraviolet visible anti-counterfeiting ink that appears on the market has good anti-counterfeiting properties. This ink does not show up under normal light and can only be seen under UV light.
There are many researches on small-sized anti-counterfeit invisible inks in China, but there are few large-scale anti-counterfeiting inks. Beijing Saiteng Power Technology Co., Ltd. developed a handheld inkjet printer, which used a large-character anti-counterfeit invisible ink to make the role of the handheld printer to the extreme. The large-word anti-counterfeit invisible ink not only has high filtering precision, fast drying speed, strong adhesion, but also product printing and printing, and has special anti-counterfeiting function for displaying blue light under ultraviolet irradiation.
Environmental protection
Environmental protection is also a topic of great concern to the public. Inks and solvents are highly volatile substances that produce more chemically toxic residues and pollute the environment. Especially for food packaging, the environmental friendliness of ink is more important, and its chemical composition and odor may penetrate into food through film and packaging, endangering human health. In order to prevent this aftermath, the United States even prohibits the use of inkjet printers on the inner packaging of medicines. At present, companies such as Domino and Videojet are very concerned about the development of environmentally friendly inks.
In addition, in the field of food packaging, some foods also require the ink to be edible to be printed directly on the surface of the food or on the inner packaging. For foods that need to be refrigerated, the logo is required to remain unchanged after the food has been chilled at around 0 °C, so the low temperature resistance of the ink is also very important.
At present, the development of China's logo industry is in the ascendant, the growth rate is very high, and the market's requirements for logo technology are also changing. The reliability and stability of the printer equipment will be an important trend in the future development of technology. The speed of domestic plastic product production lines is getting higher and higher, and the market for printing inkjet printers with fast performance is undoubtedly broader.
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