At present, there are nearly 240 production lines (including 170 imported lines and 70 domestic lines) for flexographic printing machines (including narrow width and wide width) imported from abroad and domestically developed and produced narrow flexographic printing machines. Article). These production lines are distributed throughout the country, with more production lines in Shanghai, Beijing, Zhejiang, Guangdong, Shaanxi, and Yunnan.
There are 10, 13, 16.5, 18, 21.5, 25 inches and 420 millimeters, and 510 millimeters of specifications for domestically-used unit-type flexographic presses, of which about 80% are 16.5 inches wide. Most of the color groups are six colors, with a maximum of eleven colors and a minimum of three colors. The width of the imported satellite flexographic printers is generally 800 to 1200 millimeters, generally six color groups.
Earlier this year, Shandong Quanlin Paper Co., Ltd. imported a high-speed 8-color high-speed satellite-type flexo production line using a shaftless transmission technology with a width of 1,300 mm from German F&K Co., Ltd., a three-layer co-extrusion laminating machine, and a die-cutting machine. equipment. The speed of the flexo printing machine can reach 350 meters per minute, which is three or four times faster than the unit type flexographic printing press. The speed of the three-layer coextrusion compounding machine can reach 300 meters per minute.
Zhejiang Tianwai Green Packing Co., Ltd. introduced the combined multi-functional production line of offset printing, flexo printing, and silk screen printing from the Swiss GALLUS EMO 410 and 253, becoming the first user of this type of production line in Asia. The production line uses UV ink printing and has the following features: (1) It has double-sided cleaning paper, electronic correction, corona treatment and pretreatment functions; (2) roller screen printing, four-color flexo printing, four-color offset printing and bronzing, Lamination is completed on one machine; (3) Post-press processing includes flat die-cutting, indentation, slitting, circular press-cutting, computerized paper punching, and other functions; (4) Receipt of a single sheet of paper Take paper, roll paper and other forms of delivery. In addition, the production line also has functions such as secondary register, peel-off compound printing, and reverse printing, and is mainly used for high-end exquisite packaging and printing (such as cigarette cases, medicine boxes, cosmetics boxes, etc.) and anti-counterfeit printing.
At present, flexo printing can fully meet the requirements of cigarette packs, pharmaceutical packaging, food packaging, labels, adhesive printing and other packaging prints, and can be completed online printing, die-cutting, hot stamping and other processing, can improve work efficiency, reduce Cost, increase production efficiency. According to statistics, at present, China's flexo printers account for 30% of cigarette packs, 15% for label printers, 35% for sticker printers, and 22% for other printers.
Some domestic companies have installed peeling devices on flexographic presses, which can be self-adhesive anti-counterfeiting labels; and some have increased waxing devices to provide new processing methods for candy paper packaging printing and label printing. Flexo printers have the best effect when printed on labels, and use UV inks to print better. In addition, 80% of the tableware, paper cups, and beverage packaging currently produced in China are printed by flexo. The printing of packaging paper and packaging boxes in the food industry has also gradually adopted flexographic printing. For example, hamburger wrapping paper, McDonald's food packaging box, Yili ice cream box, etc. are all flexographic. Flexo printing has shown more and more advantages in the packaging printing industry, and it has broad application prospects.
The main progress of domestic flexo printing
In recent years, the main progress achieved by flexo printing in China has mainly the following aspects.
1. Flexo printing can basically meet the needs of packaging and printing. From the flexo presses that have been put into use in recent years, whether it is narrow or wide, whether it is imported or domestic, basically can meet the requirements of packaging printed matter.
After many years of production practice, Flexo has positioned itself in China's packaging and printing market, and its market share is gradually increasing. At present, packaging products using flexo printing include middle and low-end cigarette packs, medicine boxes, and milk cartons. In the case of medium- or large-volume self-adhesive labels, logos, and beer labels, flexo printing is used very well. Paper cups, paper lunch boxes, etc. At present, most of them use flexo printing, and the proportion of plastic flexible packaging flexo printing by using a satellite flexographic printing machine is still not large.
At present, the best and most popular application of flexo printing in China is the printing of corrugated cartons. About 70% of the sales volume of flexographic media is in the carton industry each year. In addition, Shanghai, Beijing, some international multinational companies in the domestic companies, have recognized the use of flexo printing ink printing, printing products without pollution, conducive to health and environmental protection, product quality will win the customer's identity, so, like Nestle, Johnson & Johnson, Lee Chinese, Omo, KFC and other brand-name companies use flexo printing. Some procurement managers of foreign companies, for the consideration of flexo printing as green printing, must submit the orders to companies that have flexographic equipment. Facts have proved that the flexo process not only meets the needs of packaging in terms of quality, but also cooperates with mechanized packaging to increase production efficiency and reduce production costs.
2. In recent years, the quality of flexographic products has improved significantly. Peter Dums, Vice Chairman of the German Flexographic Association, once said that today, with the application of CTP technology, the quality of flexo has been comparable to offset and gravure. The quality evaluation results of China's second national flexographic printing product in 2000 also fully confirmed this point. Among the nearly 100 flexographic printing products sent from all provinces and cities in China, 9 fine prizes and 22 outstanding prizes were awarded. 24 masterpiece awards.
3. Most companies have been able to master flexo process technology and their operating proficiency is gradually increasing. Flexo printing process and operation technology are totally different from offset printing and gravure printing. Most of the domestic manufacturers that introduced flexographic printing equipment used offset printing and gravure printing equipment. Therefore, at the initial stage of production, each factory had difficulty in mastering the characteristics of flexo printing. There have been some quality problems and caused a lot of scrap.
To obtain high-quality prints, keep the ink smooth, rich in layers, and bright colors, and have strict requirements for the flexo press embossing structure, plate cylinders, plates, anilox rollers, double-sided adhesives, and inks. With so many variable factors, how to adjust the equipment to the best point, printing qualified products is very important for operators.
In recent years, some technical trainings have been held throughout the country. Judging from the current situation, most companies have basically mastered the flexographic process and operating techniques, and are able to skillfully operate flexographic presses. Grasping the five major aspects of flexo printing can guarantee the quality of printed products and reduce waste. The five links are:
(1) Prepress preparation;
(2) Printing ink suitability;
(3) Select the appropriate anilox roller;
(4) Cleaning the anilox roller;
(5) Print quality control.
4. Some companies have achieved better economic benefits. These flexo companies have one common feature: adequate living resources, stable product quality, high equipment utilization, and good economic returns. These manufacturers are: Shandong Qingzhou Xinhua Packaging Products Co., Ltd., Shanghai People's Printing Eight Factory, Shanghai Textile India Lifeng Printing and Packaging Co., Ltd., Xi'an 3D Printing Co., Ltd., Zhejiang Qianjiang Beer Group Weile Packaging & Printing Co., Ltd., and Lanzhou Yellow River Yueli Government Printing Co., Ltd. According to reports, Shandong Qingzhou Xinhua Packing Products Co., Ltd. had sales of 65 million yuan in 2000, profits and taxes were 10 million yuan, and profits and taxes accounted for 15% of sales; Beijing Yanjing Beer Group Beijing Shuangyan trademark color printing factory in 2000 sales reached 30 million yuan, total profits and taxes of 12.8 million yuan, total profits and taxes accounted for 42.6% of total sales.
5. Domestic flexographic presses and supporting materials have been developed. Due to the rapid development of flexographic technology in China, it has led the development and production of domestic flexo printing machines, anilox rollers, plate materials, inks, and equipment and equipment for plate making and flexo printing.
So far, domestic manufacturers can produce flexographic presses: Shaanxi Printing Machinery Co., Ltd., Shanxi Taihang Printing Machinery Factory, Beiren Fuji Machinery Co., Ltd., Xi'an Black Bull Machinery Co., Ltd., Wuxi Baonan Printing Machinery Manufacturing Co., Ltd., Shanghai Ziguang Machinery Ltd., Ruian Yaohua Machinery Factory and other 10 manufacturers, these manufacturers have produced a total of 35 narrow flexographic presses, the proportion of 16.5 inches accounted for a larger proportion, there are a small amount of 13,10 inches and 400 mm wide model.
From the point of view of printed products printed with flexographic presses produced by these manufacturers, the quality of prints can be basically met with the requirements for packaging and printing, which is equivalent to the general level of imported flexographic equipment. The price of the six-color unit type flexo press is less than 2 million yuan, and generally domestic enterprises can accept it.
Anilox rollers are a key component of flexo presses. At present, Shanghai Printing Technology Research Institute, Shanghai Laser Group Corporation's carving branch, Xinhua Precision Plate (Shanghai) Co., Ltd., and Shanghai Aokeli Printing Machinery Co., Ltd. can mass produce metal anilox rolls and ceramic anilox rolls. And laser engraved rubber seamless roller, rubber seamless sleeve. In 1998, Shanghai Yahua Printing Machinery Co., Ltd. and American Bernier Co., Ltd. formed a joint venture Shanghai Bernel Yahua Printing and Packaging Machinery Co., Ltd., which can produce all kinds of die cutting knives needed for flexo presses, and solved the past. Die cutter cannot supply domestic problems.
Shaanxi New Century Printing Materials Research Institute, Tianjin Ink Co., Ltd., and Shanghai Printing Technology Research Institute have developed water-based inks, water-based varnish, water-based additives, UV varnish, UV inks, and UV additives.
In the area of ​​flexo platemaking, Dalian Fulao Flexographic Plate Co., Ltd., Toyo Laser Diffusion Flexo (Shanghai) Co., Ltd., and Shanghai Renshi Computer Plate Co., Ltd. have introduced foreign full-platemaking equipment and technologies. Beijing Duoweilong Flexographic Technology Service Co., Ltd. introduced the US flexo plate making software so that domestic flexible platemaking technology is at the same level as the international. Beijing Carton Factory also introduced a large format flexo platemaking system from DuPont in 1998. Xi'an Sifang Flexo Co., Ltd. also introduced the plate-making equipment of Dutch AV (Anhe) Company. In addition, Jiangsu Taiyi Group Corporation and Shanghai Printing Technology Institute respectively launched ZR650, ZR650B and ZBR series flexo platesetters.
The development of flexo printing has also led to the development of plate making, printing inks, consumables, and other companies and companies engaged in flexographic technology services. For example, Beijing Duoweilong Flexographic Technology Service Co., Ltd. is a comprehensive flexographic technology service company that can provide one-stop service from technology development, prepress production, die cutting roll, plate cylinder production, process training and spare parts. The development of the above-mentioned supporting equipment and equipment required for flexo printing has strongly promoted the development of flexographic printing.
The problems in the development of flexo printing
1. Some companies lack of living resources
Flexo printing is suitable for batch production and continuous production of printed products, such as less print, unstable printing quality, will lead to increased costs, resulting in waste.
It is understood that currently there are still some companies engaged in flexo printing production, due to lack of living resources, production tasks are not full, equipment utilization is not high, in underemployment, "waiting for the rice" situation.
2. Unreasonable equipment selection
In the introduction of flexo printing equipment, the first consideration should be given to the object of flexographic printing, and the structure and performance of the flexographic printing press should be fully understood to ensure that the equipment is properly configured and complies with flexo printing requirements. In the previous period, some companies only considered the price factor when choosing a flexo printer, and ignored whether the configuration was suitable or not. As a result, due to incomplete allocation, some printed products could not be printed. The anilox roller is a quantitative roller for controlling the amount of ink, and the network cable, the shape of the cell site and the angle are directly related to the printed matter. According to the pattern and plate making requirements, the anilox roller should be adjusted or replaced at any time, otherwise no good product will be produced. Generally, a plate cylinder is produced according to the size of the printing plate, which is also a feature of flexographic printing to save paper and reduce the cost. It is understood that most flexographic presses are 1 color combination with 1 anilox roller, with 1 or 2 sets of roller.
At present, the status quo of some domestic flexo printing companies is that they can't afford the saddle. Some of the foreign companies we visit have at least two or three flexo presses per company, with a maximum of 15 production lines. The color group has two color machines and 12 color machines, and the number of anilox rollers of various specifications is in stock. Several specifications of the version of the drum set. In addition, there are foreign leasing companies specializing in the rental version of the drum, the price is calculated in days, which is convenient for users to rent, the company can also create income. Each company has a variety of round-pressed die-cutting rollers ready to be called at any time, and die-cutting roller manufacturers use about 2/3 of the time to repair die-cutting rollers for users, and 1/3 of the time creates new ones for users. Die cutters form a virtuous circle.
Domestic flexo
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