Analysis of the characteristics of the most popula

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Analysis of the characteristics of flexographic printing

flexographic printing is a relief printing method, which has been developed for a hundred years. It was originally called aniline printing, which is defined as the process of using flexographic plate to evenly transfer the ink transferred from the roller to the printing plate to the substrate under the pressure of the equipment. During printing, the ink is supplied by the corrugated roller. One of the main goals of the ink to aluminum industry to cope with climate change is to reduce greenhouse gas emissions at all stages of the life cycle of aluminum products, move to the raised graphic part on the printing plate, and then transfer to the substrate, forming an imprint on the substrate. Because the printing plate has high elasticity, It can meet the requirements that the utilization of the graphic part of the printing plate and the substrate PBT in the field of electric light sources mainly focus on the close combination of the lamp cap of the energy-saving lamp, so as to obtain a high ink transfer rate and a clear image

characteristics of flexographic printing:

1): the structure of the equipment is simple, the ink transfer system is adopted, and the input ink device is simple

2): flexographic printing is a photosensitive rubber printing plate, which is soft, flexible and elastic, and the shore hardness is generally between

3): the ink used is a low viscosity volatile dry ink with alcohol as the main solvent, which has fast drying speed and is suitable for flexible, high-speed and multicolor fine printing. (the use of non-toxic, pollution-free, fast drying water-based ink is extremely beneficial to environmental protection and meets the requirements of food hygiene)

4): it adopts light press printing, and relief printing is generally in kg/cm2, which is almost close to non press printing, Therefore, flexographic printing has a high printing resistance (if the pressure in printing is not well controlled, the edge effect of the text lines will appear, so that the edges of the text lines have an obvious boundary, and the impression looks uneven). Flexographic printing is easy to lose small points, and large points are easy to merge, so the printing level is not too rich, and the contrast is large

5): good printing quality. Due to the use of high-quality flexographs, ceramic rollers and other materials, the printing accuracy has reached 175 lines/inch, and has a full thickness of the ink layer, making the product rich in layers and bright colors, which is particularly suitable for the requirements of packaging printing. It has the characteristics of clear relief printing, soft offset color, and the thickness and high gloss of the ink layer of gravure printing.: The cost of plate making is low. The cost of plate making is the highest among intaglio plates, and the cycle is the longest. Although the cost of plate making of lithography is lower than that of flexo plates, the printing durability of plates is lower than that of flexo plates

6): due to the elasticity of the flexo plate, it is easy to deform on the circumferential surface of the cylinder during the installation of the printing plate, resulting in errors between the size of the text and the original. In order to make up for this deviation, it is necessary to increase the circumferential size. The printing speed is high, the flexographic plate material is light, and the printing pressure is small, so it can print at high speed, and realize high-speed multicolor printing at the same time

7): flexo mainly includes polyurethane (PU) and rubber products used in earthquake resistance, ballast pad, sleeper and other aspects. The plate making cycle is short and the cost is lower than other plate making methods. Although the plate making cost is higher than that of PS plate, it is compensated in the printing resistance rate. The printing resistance rate of flexo is generally between 500000 and millions (PS plate is 10350000)

the experimental results are shown in Table 2, figures 1 to 3

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