Best choice of flexographic materials to improve p

2022-08-24
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Reasonable selection of flexographic materials and improvement of printing quality

in recent years, people have higher and higher requirements for environmental protection printing, especially for food and pharmaceutical packaging, which will be promoted to the scope of health policy. Flexographic printing, known as "green printing", has attracted more and more attention

due to the characteristics of flexographic printing in production technology and product environmental protection, it is increasingly adopted by the majority of food packaging, pharmaceutical packaging and other manufacturers. So many carton factories will ask such a question: how to improve the printing quality of flexo? How to make flexo printing more beautiful than offset printing and gravure printing? However, there are many factors that affect flexographic printing, which is also a problem that has been binding manufacturers. Flexographic printing should be practical. To have good printing quality, we should consider more about high-quality consumables, and try to choose high-quality products in purchasing, so as not to cause misunderstandings in production. The precision and compatibility of plate making are the primary factors affecting the quality of flexographic printing, which requires good plates. Now there are digital versions on the market, and the accuracy of plate making has been greatly improved. Now Kodak's plates can meet the excessive requirements of different levels from 95% to 2%; The traditional version can also achieve more than 150 lines of fineness. Of course, prepress processing is also very important and cannot be ignored. For example, when designing patterns, we should avoid some highlights as much as possible, because too fine highlights will be worn in a very short time, resulting in white defects. Therefore, excellent prepress processing is the mother of excellent printing quality. Only under the premise of ensuring excellent prepress processing, high-quality plates can better play its role. The grade of ceramic roller is also an important factor that directly affects the quality of flexographic printing. Of course, many manufacturers can make ceramic corrugated rollers, and it is not difficult to make oneortwo of them and affect the correct reset of the force measuring pointer, but not every factory can make each corrugated roller stably. 2. It is in a transparent or translucent state. There are only threeorfour factories in the world that can stably and perfectly make every corrugated roller. So how can we choose high-quality ceramic roller? This is how to distinguish the quality of ceramic roller. First of all, the processing ability of the roundness of the stick body is not something that ordinary manufacturers can do well. Many manufacturers say: we can also make corrugated rollers, and 4 Our company has a spare parts warehouse, which is cheaper. So many carton factories fell into such a misunderstanding: they thought that the surface was like a ceramic stick, and they thought it was OK. But in fact, have they really tested whether its roundness meets the requirements? If you can't meet the requirements, what conditions are there to talk about high-quality printing effect? Not to mention what is better than offset printing and gravure printing! Secondly, the anti-corrosion treatment of ceramic roller body is also very important, because water-based inks are acidic and highly corrosive. Some ceramic sticks are well processed, but the anti-corrosion ability can not meet the requirements, so they are not an excellent brand. Anticorrosion not only requires good treatment of the base roll, but also requires high density in spraying. Then the quality of ceramic materials is the key. Cheap and inferior ceramic materials often fail to meet the requirements, so high-quality products cannot be printed. Third, the parameters that really affect the printing quality are the number of lines and ink load of the ceramic roller. Many people know that the higher the number of lines, the higher the quality of printing. But the number of high lines means that the ink volume is not enough to meet the performance of rich printing colors. Therefore, the high-quality flexographic printing can be truly matched by the high-line number and large amount of ink roller, which is indispensable. However, it is not possible for every manufacturer to really achieve high-speed lines and large ink volume. At least cheap and low-grade corrugated rollers can't be done. Manufacturers who use low-grade ceramic sticks have entered this misunderstanding, thinking that the corrugated roller is not very important! In order to have high-quality printing effect, it is necessary to get out of the error code area. The evaluation value of Wharton's total shareholders' equity during the period is 1.347 billion yuan, and we should really pay attention to the quality of the corrugated roller and its important role in printing. Then talk about high-quality printing effect, and then talk about Bimei offset printing and gravure printing. Many carton manufacturers think that the metal scraper will hurt the ceramic roller, which is also a misunderstanding. Ceramics are so hard, how can they be scratched so easily? If it was not knocked artificially, it would not be damaged! Scraping the ink of ceramic roller is like scraping the ink of gravure printing. Scraping the excess ink clearly is the guarantee of high-quality printing, so it is suggested that metal scraper should be preferred. Of course, excellent scrapers should have good elasticity, high precision, and some should have anti-corrosion ability. For example, the gold medal scrapers of CBG in Italy have outstanding performance in flexo printing, which can fully meet the requirements. The key to choose excellent double-sided tape is to have stable viscosity. Many carton factories believe that what is sticky is good tape, which is also a misunderstanding. Because the adhesive tape with too strong viscosity will cause a lot of glue residue, and it is difficult to unload. In particular, sometimes there is a problem with registration, which requires re pasting. If the adhesive tape is very sticky, resulting in a lot of residual glue, it will seriously affect the effect of re pasting, and even tear the version. Therefore, the stronger the adhesive force, the better the double-sided adhesive tape. An excellent double-sided adhesive tape should have a strong initial viscosity, which tends to be stable after reaching a certain strength. In this way, it will be easy and easy to unload the version. To make the printing high-quality, we should also cooperate with a layer of foam with average thickness, uniform hardness and good elasticity as the base. Among them, the text and comprehensive version are relatively hard; The layered gradient version uses a relatively soft one. In addition, the release paper has a concave convex surface, which is easy to drive away bubbles when pasting. Lohmann double-sided tape from Germany is one of the excellent brands. Sleeve selection

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