How to solve the problem of thermosetting ink printing fastness
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1. Use rounded corners to make the bottom, because the rounded thermosetting ink is easy to generate fluidity when it is melted at high temperature, so that the ink flows into the gap of the cloth. When the ink cools, it forms a whole with the cloth, which is firmly tied to the root of the tree. The same reason can not be pulled out of the mud. However, the right angle does not flow when it is subjected to high temperature, so its fastness is slightly worse, but because of the performance of the right angle, it can print a right angle effect like a knife cut, and the circle Corner inks can't be done.
2. According to the principle in the first article, if the ink is diluted or scraped with a thin plate, the ink is sure to enter the gap of the cloth more easily, so it is beneficial to use the thin plate to scratch the bottom or dilute the ink. The firmness between the ink and the substrate.
3, drying temperature and time directly determine the success or failure of thermosetting ink printing, thermosetting ink is a thermoplastic ink, resin and plasticizer is difficult to fully polymerize and plasticize when it does not reach its own required temperature and time, such a result The ink system is not very tight, but it is very loose. With the finger clasp, it will buckle like a powder, so there is no fastness. Some printing manufacturers dry the ink to the surface. It is considered to have the fastness. This is completely wrong. It is easy to have brightness. For example, it is very bright when it is blown for a dozen seconds with a high temperature gun, but this is the result of surface plasticization. In fact, it is not plasticized at all. There is no fastness at all. Generally speaking, the plasticizing temperature of high temperature thermosetting ink is 180 degrees for 3 minutes, medium temperature is 160 degrees for 3 minutes, and low temperature is 135 degrees for 90 seconds. However, the drying ovens of different manufacturers may not be consistent, and there are also printed The thickness of the pattern also has different requirements for the barbecue, so this data is only for reference.