As we all know, thermal foam inkjet technology has dominated the large format inkjet printer market for many years. In fact, piezoelectric inkjet technology has set off a revolution in inkjet technology. It has been applied to desktop printers for a long time. With the improvement and maturity of technology, large-format piezoelectric inkjet printers have also come out in recent years.
As the name suggests, the principle of the inkjet technology of thermal foaming is to use a small resistance to quickly heat the ink, and then generate bubbles to be ejected. The principle of piezoelectric inkjet uses a piezoelectric crystal to impact and oscillate a diaphragm fixed in the print head so that the ink in the print head is ejected.
From the above-mentioned principles, we can summarize the advantages of piezoelectric inkjet technology when applied to large-format printing operations:
(1) Compatible with more inks
The use of piezoelectric nozzles can be more flexible in choosing inks of different formulations. Since the thermal foam inkjet method needs to heat the ink, the chemical composition of the ink must be accurately matched with the ink cartridge. Since the piezoelectric inkjet method does not need to heat the ink, the choice of ink can be more comprehensive.
The best embodiment of this advantage is the application of pigmented ink. The advantage of pigment ink is that it is more resistant to UV Radiation than dye (Dye based) ink, and it can last longer outdoors. It can have this characteristic because the pigment molecules in the pigment ink tend to aggregate into groups. After the particles synthesized by the pigment molecules are irradiated by ultraviolet rays, even if some of the pigment molecules are destroyed, there are still enough pigment molecules to maintain the original Color.
In addition, the pigment molecules will also form a crystal lattice. Under ultraviolet radiation, the crystal lattice will disperse and absorb part of the ray energy, thereby protecting the pigment particles from damage. This feature is particularly important.
Of course, pigment ink also has its shortcomings, the most obvious of which is that the pigment exists in the state of particles in the ink. These particles will scatter the light and make the picture darker. Although some manufacturers used pigment inks in thermal foam inkjet printers in the past, due to the nature of the polymerization and precipitation of pigment molecules, it is inevitable that its nozzles will be clogged. Even if heated, it will only cause the ink. The concentration is more difficult to grasp, and the clogging is more serious. After years of research, there are also some improved pigment inks for thermal foam inkjet printers on the market today, including improved ink chemistry to slow down the aggregation of particles, and more Fine grinding makes the diameter of the pigment molecules smaller than the wavelength of the entire spectrum to avoid light scattering. However, users reported that the clogging problem still exists, or the image color is still light.
The above problems will be greatly reduced in the piezoelectric inkjet technology, and the thrust generated by the expansion of the crystal can ensure that the nozzle is unobstructed, and the ink concentration can be accurately controlled because it is not affected by heat. Or, thicker ink can also reduce the problem of dull color.
(two) can be equipped with high solid content ink Piezoelectric nozzles can choose inks with higher solid content. Generally, the water content of ink used in thermal foam inkjet printers needs to be between 70% and 90% to keep the nozzles open and cooperate with the effect of heat. It is necessary to allow enough time for the ink to dry on the media without spreading outward, but the problem is that this requirement prevents thermal foam inkjet printers from further increasing the printing speed. Because of this, the current piezoelectric inkjet printers on the market are faster than thermal foaming printers.
Since the use of piezoelectric nozzles can choose ink with higher solid content, the development and production of waterproof media and other consumables will be easier, and the manufactured media can also have higher waterproof performance.
(2) The image is more vivid
The use of piezoelectric nozzles can better control the shape and size of the ink dots, resulting in a clearer picture effect.
When thermal foaming inkjet technology is used, the ink falls on the surface of the medium in the form of splash. The piezoelectric inkjet ink is combined with the medium in the form of Lay. By applying the voltage to the piezoelectric crystal and matching the diameter of the inkjet, the size and shape of the ink dots can be better controlled. Therefore, at the same resolution, the image output by the piezoelectric inkjet printer will be clearer and more layered.
(3) Improve and produce benefits
The use of piezoelectric inkjet technology can save the trouble of replacing ink heads and ink cartridges and reduce costs. In the piezoelectric inkjet technology, the ink will not be heated, coupled with the thrust generated by the piezoelectric crystal, the piezoelectric nozzle can be used permanently in theory.
At present, Yinghe company is committed to the production of faster and more precise piezoelectric inkjet printers. At present, the 1.8/2.5/3.2 meters printer produced by our company are welcomed by most customers domestic and abroad. Our piezoelectric inkjet machine adopts automatic The ink absorption and automatic scraping system ensure that the nozzles are unimpeded and the nozzles are always in good condition. The system provides 1440 high-precision and high-precision printing modes. Users can choose various materials for printing. The application of the triple drying and air drying system can achieve instant The spray and dry function, ultra-low production cost, let you quickly and easily get the return.
Post time: Dec-15-2020