Labels, forms, cards and lottery and raffle tickets are personalised by ink jet or laser printers. These inks must be completely dried or cured before the printed sheets are passed on for subsequent operations such as stacking, cutting, folding or gluing.
Carbon infrared emitters dry ink jet printing inks energy-efficiently (Image: Heraeus Noblelight GmbH)
Modern UV lamps cure printing inks reliably and with sufficient power (Image: Heraeus Noblelight GmbH)
Depending on the type of ink used, UV or IR emitters are used for drying and curing and this inevitably takes place with some energy consumption. Today, it is well worth the effort to examine these processes scrupulously and find techniques which offer the best results at the greatest possible energy efficiency. At the IPEX exhibition in Birmingham, Heraeus Noblelight is showcasing emitters which can be matched precisely to the properties if the relevant coating system.
Infra-Red Emitters Improve Energy Efficiency
The Alito Color Group of Leyton, London achieved significant benefits through one simple change: They replaced their existing drier, which was fitted with near infrared (NIR), short wave emitters, with a Heraeus Carbon Infra-red (CIR) System. Carbon Infrared (CIR) emitters from Heraeus Noblelight are especially efficient at drying inkjet inks. This is due to the medium wave infrared radiation, which the carbon emitters transfer into the inks at high power.
Medium wave infrared radiation is absorbed extremely well by water-based inks. Carbon emitters combine high power and fast response times with the effective medium wavelengths.
Following successful tests, two carbon infra-red (CIR) were fitted in the existing drier frame. Each 24kW module matches a special 4¼ inch print head. As a result, it is now possible to realise the complete capability of the high speed print heads. Practical usage has shown that the print quality can be maintained even at the high print speeds. In addition, the new emitters require less energy than before and have a significantly longer operating life. This has greatly improved the machine energy efficiency.
UV Lamps with Intelligent Energy Supply
The emission spectrum of UV radiation is very important for the curing process. It must cause as many photons as possible to react with the coating, on one hand to cure the material completely and on the other to bind the coating with the substrate. Consequently, every curing process is complex and each coating system specifies its own individual curing parameters.
Some applications demand special testing and development work, such as processes which require a very high coating density with many pigments or inks. The chemistry of these coating systems requires longer wavelengths so that they can react with the UV light.In addition, other special applications require light at wavelengths which are different from those emitted by the standard mercury spectrum. This is achieved by the use of metal halide additives in the lamps and when the lamp is operated, the metal halides evaporate. Consequently, their additional spectra are emitted so that the curing process can be significantly improved.
This has been made possible through close collaboration with OEM partners, advances in lamp production have been best realised with the aid of intelligent energy supply and the development of cooling systems.
Controlled lamp cooling has allowed higher operating output power. The power was so chosen that not only can the curing take place but also the lamp can be held in standby at very much lower power than was possible previously. Considerable savings can be made. Some processes need specially developed lamps, such as small lamps (50mm arc length) and miniature lamps (15mm arc length). These are used in digital printing, where the lamp, together with the print head, travels over the surface of the print.
UV-LEDs – small, flexible and energy-saving.
With digital printing, where the lamp, together with the print head, moves over the surface of the print, every little saving in weight and size matters. Here, UV-LEDs are the innovation for the future. Their extremely small shape allows great flexibility in styling. UV-LEDs from Heraeus Noblelight are matched to the machine environment according to customer specifications. The individual components to meet the specifications are assembled from a modular construction system. As a result, even special solutions can be built. The package also includes all the associated peripheral components such as cooling, control and power supply.
An important factor governing the operating life of a UV-LED is the fact that all components belonging to the system are harmonically matched to each other. Thermal management plays the most important role in this.The LED special light sources help to save energy. Because they instantly switch on and off, energy is consumed only on demand, when it is needed, without impairment of the performance of the LEDs. LED technology stands for “solid state lighting”, a robust, solid and above all resilient technology.
The new “Optoelectronics” business division of Heraeus Noblelight GmbH profits from the core competence of the Heraeus Organisation in the manufacture of UV-LED modules and systems. In a complete development and production line, LED chips are processed in so-called “chip-on-board” technology and measured and tested in our in-house, accredited measurement laboratory. As a result, customer-specific system solutions can assembled and offered to meet special requirements.Heraeus Noblelight offers the complete palette of special emitters for printing ink curing from UV to IR, carries out tests with relevant materials and advises on the optimum selection of emitters to suit particular processes.
Heraeus has more than 40 years experience with special emitters, working both with end customers and with OEMs and carries out practical tests with customer own materials in its own application centres to establish optimal and customer specific process solutions.
Heraeus Noblelight GmbH with its headquarters in Hanau and with subsidiaries in the USA, Great Britain, France, China, Australia and Puerto Rico, is one of the technology and market leaders in the production of specialty light sources. In 2008, Heraeus Noblelight had an annual turnover of 92.5 Million € and employed 735 people worldwide. The organisation develops, manufactures and markets infrared and ultraviolet emitters for applications in industrial manufacture, environmental protection, medicine and cosmetics, research, development and analytical laboratories.
Heraeus, the precious metals and technology group headquartered in Hanau, Germany, is a global, private company with over 155 years of tradition. Our businesses include precious metals, sensors, dental products, biomaterials, quartz glass, and specialty lighting sources. With product revenues approaching € 3 billion and precious metal trading revenues of € 13 billion, as well as over 13,000 employees in more than 110 companies worldwide, Heraeus holds a leading position in its global markets.
Dr. Marie-Luise Bopp | Heraeus Noblelight GmbH
Further reports about: > CIR > Green IT > Heraeus Noblelight > IPEX > IPEX exhibition > LED > OEM > UV-LED > chip-on-board technology > cooling system > digital printing > energy efficiency > environmental protection > infrared radiation > intelligent energy supply > laser printers > light source > precious metals > printing industry > short wave emitters > wave infrared radiation
Manchester scientists tie the tightest knot ever achieved
13.01.2017 | University of Manchester
CWRU directly measures how perovskite solar films efficiently convert light to power
12.01.2017 | Case Western Reserve University
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...
Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.
Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
16.01.2017 | Trade Fair News
16.01.2017 | Automotive Engineering
16.01.2017 | Life Sciences