Process comparison between liquid flexo and solid

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Comparison between liquid flexo and solid flexo of cartons

liquid flexo has been used in carton printing for more than 20 years. In economically developed countries, due to easy environmental protection, low cost and other reasons, the market share of liquid flexo is as high as 50%. In China, some research units conducted research and production in previous years, but the production scale has not yet been formed; The product quality is very unstable and needs to be improved. When flexographic printing technology first entered China, several large carton factories introduced liquid plate making machines respectively. At that time, the price of equipment and materials was high and it was difficult to support, so it did not form a market in China and was promoted. With the improvement of product diversity and adaptability; With the continuous improvement of market support and the decline of equipment prices, more importantly, the excellent environmental protection of liquid flexographic materials in the plate making process. The use of liquid flexographic in the carton printing industry began to receive attention. The following is a performance comparison between the liquid flexo and the solid flexo produced by Medusa (formerly poly FA) in the United States. Make everyone have a better understanding of liquid flexo

material composition and morphology

liquid flexo and solid flexo materials are basically the same in terms of imaging principle, but the materials used and product morphology are completely different, but we should pay attention to the difference. The main component of liquid flexible materials is high viscous resin, which can flow without fixed shape at room temperature. The solid plate material is mainly composed of rubber, which is a solid with fixed shape at room temperature. MDM's liquid plate materials are sold in the market in the form of 18 kg/barrel. At the same time, according to the specifications of the user's plate making equipment, it provides plate making materials such as isolation film and polyester substrate with corresponding sizes. Solid flexo is packed in cartons according to thickness and size

in terms of structure, the solid version is a single-layer structure of polyester substrate and flexible body. The liquid version can be made into single-layer structure or double-layer structure according to user requirements

printing performance of liquid version and solid version

liquid version is suitable for water-based inks and oil-based inks, and solid version is suitable for solvent inks with water-based inks and ester content of no more than 25%

on the surface of the printing plate, the affinity of the liquid version to water is significantly higher than that of the solid version. According to the opinions on the implementation of the hope project for small and medium-sized enterprises in Tongling City, the ink transmission of the liquid version is better

in terms of image parameters of printing plates, both the liquid version prism and the solid version flexcor of Medusa can reach the same index. Half tone 2% - 95%, 100 lines/inch (40 lines/cm), the gasket should be made of red copper or aluminum alloy, the diameter of the independent point is 0.38mm, and the width of the independent thin line is 0.38mm

the plates made of the two materials are roughly the same in hardness. However, the liquid version materials of Medusa can provide products with different hardness for users to choose

in terms of printing resistance, the printing plates made of both plate materials have excellent performance

plate making process

the following is a comparison between the flexcorl55p (3.94mm thick) of the solid flexplate made by Medusa and the process steps of the 3.94mm flexplate made by whether the screw caps of various parts of the liquid flexplate, especially the nuts at the oil pipe joints, are tightened with the material ptism

■ although the principle of the liquid flexplate making equipment is the same as that of the solid flexplate making machine, its structure and function are slightly different

■ the unexposed part of the liquid material in the plate making process can be recycled

■ the liquid version can be cleaned with water and a small amount of additives, while the solid version needs to be cleaned with a very expensive mixture of tetrachloroethylene and n-butanol

■ the plate making time of the liquid material is about 1.5 hours, while the solid version can be completed in more than 3.5 hours

from the above comparison, it can be seen that liquid flexography has certain advantages over solid flexography in terms of plate making time, environmental protection, printing quality, etc. on the premise that the investment cost of materials and equipment is the same or slightly lower than that of solid flexography, liquid flexography will have greater market development space

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