How to solve the problem of printing fastness of t

2022-08-09
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How to solve the problem of printing fastness of thermosetting ink

1. Use rounded corners for backing, because the rounded thermosetting ink is easy to produce fluidity when it is melted by high temperature. In this experiment, the ink adopts a circular sample to flow and penetrate into the gap of the cloth. When the ink cools down, the cloth forms a whole, which is the same as the root firmly rooted in the mud and cannot be pulled out, but the right angle will not flow under high temperature, Therefore, it is widely used in aerospace, petrochemical, machinery manufacturing, plastic rubber, ceramic building materials, metal materials, construction engineering and other industries, but because of the performance of the right angle, it can print a knife cut right angle effect, while the rounded corner ink cannot

2. According to the principle in the first article, if the ink is diluted or scraped with a thin plate, the ink will surely enter the cloth gap more easily, so generally speaking, scraping with a thin plate or thinning the ink are beneficial to enhance the firmness between the ink and the printing material

3. The drying temperature and time directly determine the success or failure of thermosetting ink printing. Thermosetting ink belongs to thermoplastic ink. When it does not meet its own required temperature and time, the resin and plasticizer are difficult to fully polymerize and plasticize. As a result, the ink system is not very tight, but very loose. Picking with your fingers will make it buckle down like powder, so let alone have fastness, Some printing manufacturers think that there is fastness when they dry the ink until the surface has brightness. This is completely wrong. It is easy to get brightness. For example, blowing it at high temperature with a fire gun for more than ten seconds will have good brightness, but this is the result of surface plasticization. In fact, it has no plasticization at all, that is, it has no fastness at all. Generally speaking, the plasticization temperature of high-temperature thermosetting ink is 180 degrees for three minutes. At medium temperature 16, the research team developed a simple, economical The method of environmental protection is 0 ° C for 3 minutes and 135 ° C for 90 seconds. However, the drying ovens of different manufacturers may not be the same, and the thickness of the printed pattern also has different requirements for barbecue, so this data is only for reference

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