The latest progress of screen printing (on)

Recent advances in screen printing in the field of plastic decoration Foreword Plastic products have entered the commercial market long ago. Currently, the decoration of plastic products mainly adopts screen printing, and the cooperation between screen printing and plastic decoration industry continues to make progress. . As plastic processing plants continue to develop new material formulations, screen printing has been able to print on plastics with different surface textures, different hardnesses, and different beginnings. So far, screen printing has surpassed other alternative processes for plastic decoration such as flexographic printing, offset printing, pad printing, and digital printing. However, with the continuous progress of these printing processes, the plastics processing industry naturally raises the question whether screen printing can continue to occupy the dominant position in the field of plastic decoration.
Of course, we expect that the demand for the plastic decoration market will continue to expand with the emergence of new plastic products. The rapid development of IMD is a good example of the main role of screen printing in the plastic decorative market.
Screen printing can be called universal printing. It can use a variety of inks to print on a variety of substrates. It is this flexibility and versatility that facilitates it in many different printing processes. Take advantage of. And the most important is that it has high productivity, predictability, and consistency in printing.
This article will discuss screen printing equipment, inks, screens, and process features, and look forward to some new advances in this area to further improve screen printing quality.
No ink can be used by any one printing process. Screens can be used in the same way as inks and coatings. Other printing processes are often limited to print on plain paper, cardboard, and plastic, and the ink layer is relatively thin. The thickness of the screen printing ink layer can be flexibly controlled according to the needs, thin or thick; substrates include various materials: small wood, textiles, metal, glass, ceramics and so on.
At present, there are many types of screen printing inks, such as fluorescent inks, fragrance inks, color-changing inks, reflection inks, foaming inks, and discharge inks. Different substrates require different formulations of ink and can be selected from matt, semi-gloss, high-gloss, and clear inks. In addition to printing on flat plastic materials, screen printing can be applied directly to containers, bottles, and Printing on other cylindrical objects, in addition, screen printing inks do not have excellent fade resistance, weather resistance and abrasion resistance.
In order to meet the environmental requirements of inks, screen-printing ink manufacturers have also invested a lot of money in research to develop many environmentally-friendly products such as UV inks, water-based UV inks, and water-based inks, and also developed instrument plastics that meet health standards. Box decorative ink.
Wire mesh screens play a decisive role in the quality of images or ink layers. Screens are the central link of the entire screen printing technology. At present, there are various types of screens on the market, such as metal screens and synthetic fiber screens, which are suitable for printing different products. But what is important is that screen printers or plastic decorators must have a good understanding of the variety of screens and screens for each type of print. Grasping the knowledge of the screen can avoid unnecessary interference in the printing, and can ensure the economic use of ink. The correct choice of screen has a great influence on the final printing effect. The following points should be noted when selecting the screen.
The larger the opening of the screen, the greater the ink flow through, and the thickness, flatness, ink drying, ink consumption, and hiding power of the ink layer are largely determined by the screen.
The screen must be selected according to the substrate used (paper, cardboard, plastic, and the smoothness or roughness of the surface, etc.).
High-precision prints require the use of screens with excellent stability, such as wire mesh or polyester mesh.
The right choice of screen to use directly affects the cost of the product.
1. Compared with other printing processes, Xinzhong Plastic Packaging Machinery Co., Ltd. has relatively thicker ink layers for screen printing, and can also flexibly control the ink layer thickness according to the requirements of substrates. For example, most images are printed with a dry ink film thickness of 5-7 UM, and can be increased to 100 UM when needed. This is very important in electronic printing such as circuit boards and film openings.
It is clear why people often say that screen printing not only represents the printing process but also coating technology. At present, the application of screen printing technology is becoming more and more extensive. At the same time, the doors of many new industrial fields are open at all times, creating more opportunities for screen printing.
The size of the printed web can range from a few centimeters to several meters. In super large-format advertising printing, the substrate can be not only vinyl paper but also hard plastic.
Special effects and shapes Screen printing is economical for both long-lived and short-lived jobs. Offset printing, flexo printing, and stamping are all only cost-effective for medium-to-long live printing. Digital printing is only It is only worthwhile to print in the short version and in the middle version. Compared with screen printing, there is a great deal of flexibility.
Durability Chemical resistance and weather resistance tests have shown that screen printing inks have a longer life than other printing inks. This is very important for the printing of traffic signs and sports equipment (table skis, etc.), because these prints must be Experience the challenges of harsh weather conditions.
The following will introduce some of the latest advances in screen printing technology. Screen printing has now entered a higher stage of control, becoming a predictable, repeatable process. (To be continued)

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