Application of uv light source in uv printing fieldread count [271] release time：2020-01-09 20:16:00
LED Light sources have been widely used in the field of civil lighting due to their energy saving, environmental protection, durability and excellent luminous performance. and UV LED light source The application in the radiation curing industry has just started and involves many aspects of industrial production. many In fields such as optical processing, laser and optical communication product manufacturing, LCD and touch screen packaging, medical product bonding, PCB exposure, visual inspection, etc., UV mercury lamps show huge advantages over traditional UV mercury lamps. We believe that UV LED light sources will replace traditional mercury lamps in the field of glue curing. Going deeper and deeper!
UV printing is an area where UV lamps are more widely used. Compared with glue curing, the use of UV lamps in the printing market shows the following outstanding characteristics:
1、UV The lamp usage is large, and one device is used from printing to post-press. UV Deng Shao Ze1-2branch, many 6-8branch
2、UV The lamp is very powerful. 3KW arrive 20KW No, it consumes a lot of power
3、 Tradition UV Mercury lamps generate a lot of heat and have great limitations on the choice of printing substrates.
4、 Tradition UV Mercury lamps start slowly, take a long time to warm up, are only suitable for continuous operation, and cause a lot of waste to normal production. Fees, poor flexibility
5、 Extensive use of mercury lamps will inevitably cause a large amount of mercury pollution
UV LED Light sources have broad prospects in the field of printing. Applied to printing direction UV LED light source and for UV stick The light sources of the binders are different. because LED The luminescence spectrum itself is very narrow and the energy is concentrated, so it needs to be combined with LED Ink can achieve good results. In view of the high printing speed, larger UV energy, therefore high power UV LED It’s for printing UV clear direction. Currently for cost and efficiency reasons 395nm high power UV LED is the main research and application direction. Its advantages are mainly reflected in several aspects
1、UV High light purity, same power 395nm UV LED compare 365nmUV LED The luminous efficiency is nearly twice as high, and the light The energy output is greater. Our company adopts British integrated packaging technology for single 3W 、10W 、40W 、120W of LED Already ready for mass production, the highest light output can reach 16W/CM2
2、Low power consumption, Long service life. Saves electricity compared to mercury lamps 70%by superior,Can save a lot of consumables, drop Low Maintenance cost
3、 Cold light source irradiation is suitable for a variety of printing substrates, especially temperature-sensitive materials such as plastic films.
4、 Suitable for instant on and off, easy operation and easy system integration
5、 The power of the chip can be selected arbitrarily, and any combination of chip power and irradiation size can be achieved. Currently, there are multiple Specifications are optional, Suitable for inkjet printing 3020（mm）、6020（mm）、10020（m m），power 2W/CM2； Suitable for offset printing and U V glazed30020（m m）、60020（m m）、130020（mm），power 4W/CM2
6、Equipped with high-power liquid cooling system to ensure LED The light source works stably for a long time
However, it currently applies to UV LED There are relatively few inks, inks, and varnishes for light sources, and most of them are from a few foreign brands. Card son, domestic UV LED The progress of ink is still lagging behind. In the fierce competition environment, some equipment manufacturers have already taken action and launched UV LED Inkjet printers and inkjet printers mostly use inks from abroad and Taiwan. Another part of the equipment manufacturers still take a wait-and-see attitude. What everyone is concerned about is LED Ink cost and stability. UV Glazing is an important part of post-press processing in the printing industry. The so-called printing glazing is the process of completing graphic and text printing. back，Apply varnish once or twice to the surface of the paper. Make the printed surface bright UV film layer. Printing glazing can enhance the light resistance of ink, Wear resistance, Increased ink layer heat protection, Moisture-proof ability, To protect the imprint, beautification products、Replaces the function of coating. local UV The glazing process is to glaze certain parts of the printed matter or specific patterns and text. Make it have a clear contrast effect with the surrounding graphics and text, highlight key points or themes, Reflect product characteristics, to a certain extent high product grade. At present, local glazing technology is applied to many carton packaging. UV Glazing technology is widely used in post-press processing of many printed matter, mainly due to its own characteristics:
1、UV The glazing oil contains almost no solvents and produces very little organic volatile emissions, which reduces air pollution and improves work efficiency. do environment, more environmentally friendly
2、UV The glazing oil has strong affinity to the ink and adheres firmly to it.
3,through UV The color of the printed matter processed by the glazing process is more prominent and bright than other processing methods, and the cured coating is wear-resistant, waterproof, moisture-proof, and has good stability.
4、UV The glazing oil has high active ingredients and low volatility, so the dosage is saved. The coating amount of glazing oil for general coated paper is only 4g／m2 or so, the cost is about the cost of lamination 60About %, more economical
5, can avoid defects that often occur in the coating process, such as blistering, wrinkling, delamination, etc.
6,go through UV The glazed products can be stacked and stacked after curing, which is conducive to post-processing such as binding.
Currently used UV The glazing methods for printed matter include offset glazing, Gravure printing and glazing, Screen printing varnish. Among them, screen printing is a partial method used by most printing factories. UV Glazing method, Its advantage is that it has various glazing effects. The thickness of the varnish layer can be adjusted, and and It has strong coverage, strong three-dimensional effect, highlights product features, enhances visual effects, has high flexibility and wide applicability. UV LED light source on paper UV The glazing process has started to be used. On the premise of replacing traditional mercury lamps, Guaranteed print Brush quality. Among the lotteries issued by our country “"Scratch-off" is a typical application. UV Partial glazing technology, for the scratch area The position is glazed, Ensure the lottery area is waterproof and moisture-proof, Wear-resistant and safe, Ensure the stability of printed graphics and characters in specific parts Certainly properties, and then ensure that the masking ink is peelable, and then screen-print the masking ink on the glazing area. UV During the glazing process, UV light source and UV The choice of varnish is crucial. UV LED Curing of varnish by light source middle It can completely replace the traditional mercury lamp, especially to avoid UV During the glazing process, the paper is deformed and bent due to high temperature, and furthermore UV LED The use of light sources saves a lot of electrical energy. UV There are different choices of varnish for different glazing materials. In paper UV We have done a considerable amount of testing in the field of glazing. For different manufacturers LED The varnish has undergone corresponding drying tests.
UV LED and UV LED Ink has broad prospects in the field of printing, but the road is tortuous, especially in the current era of energy conservation and In the environment of environmental protection, green and economical production, UV LED Substitute traditional methods in printing and post-press operations UV Mercury lamp meaning righteous major, It’s not just about improving the environment; More importantly, it contributes greatly to the saving of production costs. Therefore, in the printing field, it is necessary to LED ink and UV LED The solidification system is developing simultaneously, and what is more important now is LED Ink R&D and production are relatively lagging behind. The good news is that in our country, whether it is universities, research institutes or companies in some industries, LED UV A lot of research and experiments have been done in the development of ink. Some of these ink products are already on the market. For such inks, we have made a lot of matching Testing, a lot of experience accumulated in customer applications!
