As a new type of printing method, electronic printing is still not perfect for its research, and there are some misunderstandings about its understanding. Some people think that thermosetting ink can be used for electronic printing. Is this the case? After the following analysis, the problem is clear.
Thermosetting ink
The imaging principle of thermosetting ink. Thermosetting ink can be wrapped around the fiber of the substrate (such as fabric), and it will physically react with the fiber and be fixed on it, and it will not fade for a long time. Thermosetting ink does not contain any adhesive, so how does it combine with the substrate (take textile fabric as an example)?
Is "temperature". The main components of thermosetting ink are PVC resin and plasticizer. At room temperature, they are paste-like solids. When the temperature rises to about 150 ℃, the thermosetting ink that gradually melts into a thick liquid begins to slowly penetrate down into the gap of the substrate. When returning to normal temperature, the thick liquid thermosetting ink will solidify again instead of the original paste solid. This solidified solid chemical composition is firmly integrated with the surface of the substrate it is immersed in, forming Printing effect.
Characteristics of thermosetting ink. A significant advantage is that it will not block the screen, making printing fine patterns easy. It has been widely used in printing; thermosetting inks must be dried at high temperatures; thermosetting ink printing does not need to clean the screen, even one month after the tenth day. You can continue printing the next day, mainly because the general ink is sticky (so it will stick to the plate when it is dry) and self-curing (of course, it is necessary to block the network), but the thermosetting ink is not; the thermosetting ink is difficult Printed on the substrate without holes and gaps, such as: metal, glass, etc.
Electronic printing
Principles of electronic printing imaging. Electronic printing is to energize the screen. When the toner passes through the opening of the screen, an electronic charge is applied. At the same time, the pattern is preheated or solvent vapor is applied. Under the action of high voltage and due to static electricity, the toner heats up. The fixed way is fixed on the substrate, forming the same figure as the screen.
Features of electronic printing. The printing plate does not need to be in contact with the substrate, and can be printed on the surface of any uneven, fragile, high-temperature object; the toner particles are small, which can be fixed and dried instantly on the surface of the object, so no drying device is required; multi-color can be used with colored toner print.
DC voltage power supply requires high-voltage resistant electronic components, electronic printing devices need to have automatic positioning components, and the entire equipment is relatively expensive (about 5 million yuan).
Thermosetting ink cannot be used for electronic printing
From the basic knowledge above, it is not difficult to see that the imaging principles of inks used in electronic printing are more similar to thermosetting inks, and because of this, some people have misunderstood that thermosetting inks can be used for electronic printing. But the truth is: no.
Thermosetting ink can only be printed on substrates with holes and gaps, and electronic printing can be printed on any substrate, which is also the magic of electronic printing.
Both thermosetting inks and electronic printing display images on the substrate by means of thermosetting. But the former heat-set object is liquid ink, the latter heat-set toner.
Thermosetting inks require special drying, while the toners used in electronic printing do not require drying devices.
When the thermosetting ink is heated by electricity, when the temperature rises to about 150 ℃, it can also achieve the following transformation
However, the process of transferring the thermosetting ink from paste to liquid and transferring it to the substrate can only be achieved well under the premise that the printing plate and the substrate are in contact. Electronic printing requires that the printing plate and the substrate are not in contact. In this case, After heating, the liquid thermosetting ink can only flow or drip onto the substrate. This imaging effect is obviously not ideal for toner imaging through electrostatic action, and the effect of charge can make the curved surface or the side appear respectively, without affecting the image. The continuity of thermoset inks clearly cannot achieve this effect.
Electronic printing is a new printing method that can be performed on the surface of any object, and it is also the trend of printing development in the future. Especially in the current rapid development of the Internet, there must be a lot of room for development.
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