Overview of the coating process of the most popula

2022-08-10
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Overview of coating process of printing Polish

looking at the current situation of the packaging and printing industry, although printing is the most important process, its profit margin is far less than other processing processes. We can often see that manufacturers do not hesitate to purchase printing equipment worth millions of dollars, but pay less attention to the investment in other post press processing equipment, so that inefficient post press processing equipment is often used to match high-end printing equipment

glazing can be defined as using two different processes of coating or film coating to add materials that can penetrate and eliminate friction on the surface of printed matter, so as to improve visual effects or protect products

overview of coating process

coating is a process in which liquid resin is evenly distributed on the surface of materials through different printing methods (such as gravure printing, printing, flexographic printing), and then the resin is dried or solidified by hot air or rays to form an isolation layer, so as to improve visual effects or protect products. Its characteristics are: the surface characteristics of the coated product (flatness and uniformity with average weight of more than 50%) basically depend on the leveling of the coating, and this process can be applied to the whole or part of the printed matter according to the design requirements

1. What is paint

paint is a thin layer of material covered on the substrate through the coating process, which generally exists in the form of colorless or single color. In addition to the change of brightness, generally speaking, it is for the purpose of changing the surface function of the product, such as changing the release, frost resistance, oil resistance and other functions of the product. However, sometimes it is also used to change the characteristics or visual effects of the substrate itself, such as coating flame retardant to increase the flame retardancy of the material, and even using different processes to form a lens (such as a grating) with paint to simulate the stereo printing effect in conjunction with printing

2. Types of coatings

coatings are generally less harmful to metal materials with high plasticity due to stress concentration. They can be divided into solvent-based, water-based (emulsion) and 100% solid content curing coatings (including UV curing and electron beam curing)

3. precautions for coating selection

① flow rate ② adhesion ③ softness ④ foaming ⑤ content of organic solvent

4. precautions for coating

① leveling ② drying speed ③ pinhole

5 Precautions after coating

① gloss ② flatness ③ smoothness ④ fading ⑤ adhesion to substrate

⑥ softness (or hardness) ⑦ adhesion to materials in the next process ⑧ degree of drying or curing

⑨ solvent residue ⑩ function test (such as wear resistance, skid resistance, frost resistance, oil resistance, etc.) (end)

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