Let's see how flexographic printing strives for a favorable position in the flexible packaging market.
the current overall situation of flexographic printing in the flexible packaging market. Anyang now needs a large comprehensive platform for development. The printing quality is difficult to match that of gravure printing, but after efforts, it is not impossible to approach the gravure quality level. The flexographic printing machine of Shanghai Ziguang Machinery Co., Ltd. adopts aucoli ceramic re texturing roller (black 800 line/10, red and blue 700 line/10, yellow 600 line/10). The printing products are measured by Japanese dm-800 densimeter. When the white version is 0.00, the black field is as high as 2.4, which exceeds the density contrast standard of offset printing 1.8~2.0, and is close to the visual effect of the best inversion film 0.03~2.45. The sample looks strong contrast, bright and thick colors, and delicate layers, Very high definition
compared with flexographic printing, gravure printing has obvious advantages: flexographic printing has a wide range of materials, and gravure printing is difficult for extremely thin plastic films and rough surface substrates, such as some thick paper without calendering treatment. Flexographic printing adopts light printing pressure (about 2kg/cm) and alcohol or water-based ink. The ink layer is thin, which is convenient for high-speed printing. In terms of printing speed, it is the fastest of all printing processes at present, 1.5~2 times that of gravure printing (generally at 200~400m/mln, and the highest printing can reach 680m/MLN)
of course, because the printing plate is easy to deform, although it is difficult to control it by using light pressure, the graphic line points of flexo printing tend to spread and expand, and the points generally increase (the increase rate is% - 30%, and the middle tone can be up to 50%), which inevitably makes people feel abrupt. The high-profile level transition of gravure printing is quite smooth, and it is easy to make the "absolute" effect of 175 lines/ten
the plate making cost of flexo printing is about 30% of that of gravure printing, and the cost is much lower, but its printing resistance is 10% of that of gravure printing. For short version products, products with low printing quality requirements, of course, flexo printing should be used, especially satellite flexo printing, which has simple operation, fast registration, significantly lower loss than gravure printing, and much lower operating cost; But on the contrary, when flexographic plate making, dots below 3% are easy to lose, and gravure printing generally has no such concern. Therefore, gravure printing should be used for fine products, especially long version or high value-added products
gravure printing plays a leading role in the packaging field of European famous brand goods, and about 80% of the packaging of well-known brand products adopts gravure printing. For fine products with particularly high requirements, if a large area of field and fine points are the same, sometimes the method of separate printing will be adopted like flexo printing. For flexographic printing, its operation and maintenance are more convenient. It is equipped with a set of plate rollers that can adapt to different printing lengths to adapt to the packaging prints with changed specifications. However, at present, the traditional flexographic plate is still mainly flat. When pasted on the cambered roller, due to the thickness error of the plate and the thickness error of the adhesive tape, plus the bending deformation compensation size error of the plate, as well as human factors, it is difficult to control the resulting overprint error, but there is no big problem with this gravure printing
satellite multi-color flexographic press, in which the diameter of the impression cylinder is large, the height is high, and the loading operation is inconvenient. The more the number of colors, the larger the cylinder is, the weight of the steel cylinder is doubled, and the operating power is also doubled. The energy consumption is much larger than the unit gravure press, but it is a personalized and customized space, while the trolley type plate loading system of the unit gravure press is flexible and convenient. Flexo printing adopts alcohol or water-based ink, with thin ink layer and low consumption, which is in line with the concept of environmental protection and green packaging. At the same time, the depositor of the segment dynamics takes this as the reason to eliminate gravure printing. First of all, at present, benzene based inks are mostly used in gravure printing, especially in China, which is an indisputable fact. However, alcohol based gravure inks have long existed, but their performance is mainly that the printing fastness is not very ideal. In developed countries in Europe and the United States, the inks they use are often common for flexo printing and gravure printing
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