23.03.2014
Lamp spot curing systems have a broad spectral output for flexibility in matching the requirements of the adhesive.
UV spot-curing systems have been used in assembly and manufacturing processes for over 30 years. UV spot curing brought a number of advantages over traditional adhesive assembly methods, including two-part epoxies or thermal cure adhesives. More recently, amid growing interest, LED technology has advanced in both output power and available wavelengths to the point that it provides a valuable solution for UV spot curing. For companies developing a new assembly process, this provided a good opportunity to test out new curing technology. Today, over half of the UV spot-curing systems sold globally use LED technology, although many applications still exist where the traditional mercury arc lamp continues to be the most appropriate solution. Due to the benefits and potential cost savings of using an LED spot-curing system, there is ongoing interest in changing an assembly process from a lamp-based spot-curing system to an LED spot-curing system. In any curing process, it is important to be able to control the time, irradiance, spectrum of light and heat, as these will have a direct impact upon the final properties of the assembled parts. When considering changing a process from using a lamp-based spot-curing system to an LED spot-curing system, the most important factor is the difference in spectral output between the two technologies. However, while the total irradiance may be equal to that used in the process with a lamp-based system, the distribution of the energy will be significantly different. Due to the narrow spectral bandwidth of LED output, it is critical that the wavelength of the LED system matches the absorption spectra of the adhesive.
The adhesive spec sheet will specify a spectrum of light required for curing, based upon the photoinitiators contained in the adhesive. Due to the significant spectral differences between a lamp-based spot-curing system and an LED spot-curing system, it is not recommended to change curing technologies on an existing process without extensive testing to confirm the resulting parts will be equivalent. Unfortunately, a number of adhesives have not been able to match the physical properties of curing with a lamp-based system as when an LED system is used. The Handbook of Sealant Technology provides an in-depth examination of sealants, reviewing their historical developments and fundamentals, adhesion theories and properties, and today’s wide range of applications.
The Spectatek Hand Held UV Curing Lamp System is perfect for those smaller concentrated projects that require speed and flexibility in drying UV Primers, topcoats and substrates. The Spectratek UV Hand Held Curing Lamp continues the trend of outstanding paint and substrate curing products from AMH Canada.Quality and Affordability are always built in to the Spectratek brand. The Spectratek Hand Held UV Curing Lamp Modular design combines safety and and functionality beyond compare. Master Bond offers an extensive line of epoxies and UV curing systems for use in fiber optics devices. Master Bond fiber optics compounds are used as adhesives, sealants and coatings in different fiber optics devices.
Optiforms optical components are found in medical and dental devices, aeronautics and aerospace systems, safety detection devices, point of sale displays, semiconductor wafer systems and specialty lighting ranging from entertainment to search to architectural applications. Whether prototypes or production runs, our engineers will turn your design concept into a manufactured reality. If your application uses a mirror to achieve high-resolution imaging or directed radiation, Optiforms has the experience and capabilities to engineer a suitable solution. With applications ranging from baby warmers, to retinal imaging, teeth whitening and hair removal systems, we count some of the leading medical device manufacturers in North America and Europe among our customers. Optiforms reflectors and filters can take light generated by a single point light source or linear lamp and control its path and bandwidth to the material to cure. Our thin film coatings sort out unwanted IR light to help keep resins from boiling or burning during exposure. We can also refurbish and restore many other flat and curved surface reflectors used in lithography equipment around the world.
With over three decades of technical advancements in high power lighting components, Optiforms is the industry leader for large surface of revolution reflectors. Incorporating mounting features and high-tech, high-temperature coatings are just a few of the processes that set us apart from other suppliers. We offer a wide variety of standard components and coatings along with the engineering support for projects with more precise tolerances. Optiforms is ready to work with you on all phases of your project from concept to design to development and manufacturing. Global leader in electroformed optics, deep-dish optical coatings and infrared imaging components for the Aerospace, Medical, Semiconductor, Specialty Lighting and Industrial markets.


Wet Area’s onboard marine vessels need high performance materials to provide a long term waterproof solution that wont allow water to attack the steel decks underneath. Infralight Pty Ltd is a leading supplier and consultant of infrared, infrared heating, infrared elements, infrared lamps, radiant tubes, twin tube heating quartz elements, infrared ovens. An infrared cuiring and drying system can deliver heat quickly and accurately in the area that is required, energy is not wasted and it is a highly efficient heating unit.
Infrared heating technology is used today for fast, targeted heating in a wide range of material processes.
Historically, mercury arc lamps have been used as the curing source in a range of industrial applications and processes to polymerize adhesives. Where suitable, the new curing process could be developed specifically for an LED curing system, including selection of an appropriate adhesive and determination of required curing parameters.
The narrow bandwidth of LED light sources with no infrared energy reduces the amount of heat generated in the curing process, making them ideal when assembling heat-sensitive parts such as plastics or electronic components. Lamps systems provide significantly more optical power than the UV LED heads used in spot curing. If a process is in place that already works, it is important to understand the effort required to replicate the assembly process with an LED system in order to calculate a return on investment for the time and cost required to qualify a new system. In most good quality spot-curing systems, the first three factors can be directly controlled; heat is a byproduct of the curing process, resulting from the combination of the first three factors and the substrates being joined.
A light-cured adhesive must receive a sufficient dose of the correct spectrum of light to be fully cured. Light outside of this will also affect other components of the adhesive as well as the substrate.
One of the curing methods commonly used to overcome oxygen inhibition is to use short wave UVC (200-280 nm) energy, which does not penetrate the surface of the adhesive and promotes a hard surface finish. Many new and existing adhesives have been shown to achieve equal physical properties cured with an LED system compared to those cured with a lamp-based system. The Spectratek brand is highly recognized in body shops, industrial facilities and auto manufactuer plants around the world. Designed for high performance fiber optics bonding, coating, potting and encapsulation applications.
From search light reflectors for surveillance helicopters, to covert filters for long-range IR light sources or cold shield housings for high definition IR imaging systems, attention to detail comes first at Optiforms. You receive the quality, accuracy, and on-time delivery that sets Optiforms apart from its competitors. Customers report increased operational hours and a resultant decrease in service using our metal reflectors over an equivalent glass or untreated aluminum reflectors. We are experts in radiant energy systems, electro-optical and electro-mechanical systems, low mass cold shields, unique electroformed structural shapes as well as enhanced spectral performance coatings. We have the resources and expertise to provide the solutions designers and engineers need to manufacture their products better, faster, and more affordably whether a one off prototype or hundreds of units per month. These include using waterproof materials to ensure the installation provides a long term solution. Infrared heating is commonly used in many industrial manufacturing processes: Drying and curing films, paints, inks, lacquers, adhesives, powder coating. The size of the infrared  system is very small compared to normal convection and other types of heating systems. The gold reflector applied to the quartz tube directs all of the infrared heat onto the product where it is needed. This mode of heating allows the user precise temperature control over the process, saving production costs and time with a much higher qulaity of production. The advantage is the operation will save money on power as the system is only heating when product is being processed. Infralight Technology supplies a range of infrared heating lamps from the quartz twin tube heating elements with the gold reflector to the halogen single tube elements. With their broad spectrum and high output, lamps have provided an effective solution for many years. In addition, using light rather than heat for curing is well-suited for heat-sensitive plastic parts or electronic components to improve yields. Compact camera modules for cell phones are an example where new processes were being developed to accommodate the tremendous growth for these parts as LED spot-curing systems were becoming viable. A typical 200 W Hg lamp provides about 6 W of optical power, compared to a 365 nm LED that has about 1 W of optical power.


21) shows a typical distribution of energy for a mercury lamp, as well as for 365 nm and 400 nm LEDs.
If the spectral output of the LED does not match the spectral absorption of the adhesive, then regardless of the irradiance level or exposure time, the adhesive will not cure. It is the combined effect of the full spectrum of light on all components of the adhesive as well as the substrate, which results in final physical properties of the cured adhesive and assembled product.
LEDs are not yet commercially viable in these wavelengths to provide the same benefit and would therefore rely on other methods such as using a nitrogen purge to eliminate the tacky surface.
Master Bond’s adhesives contain no potentially objectionable contaminants and exhibit excellent resistance to corrosion and adverse environmental conditions.
Our thin film laboratory has been a leader in vacuum deposition surface enhancement coatings where maximum performance is a priority. We also use a durable finish which not only looks attractive but can also provide slip resistant and chemical resistant properties. Infrared heating is widely used to heat products on a web application such as glass laminating, removing film water, drying timber, paper.
A typical near infrared dryer will be less than a meter in length compared to 10-30m for a typical convection system and at a 10th of the cost. Normal electric or gas convection systems need to be operated continuously because they have very long warm up times. Early applications included single-use medical devices such as catheters and syringes, along with electronic components such as hard disk drives and optical pick-ups. As a result, new assembly processes for compact camera modules were almost exclusively developed using LED spot-curing technology. LED systems use focusing lenses to provide the maximum irradiance in small spot sizes (2-6 mm) at specific working distances. Therefore, LED spot-curing systems are available in a number of different wavelengths such as 365, 385, 395 and 400 nm in order to accommodate various adhesive requirements. Infrared is used as localised heating for spot repair on damaged vehicles, planes, various components, plastics. Because Infrared heat is actually light and has all the properties of light, the gold coating is applied to the back of the quartz tube, reflecting all of the heat. Fast response quartz infrared heating elements when the power is deactivated, switch off instantly with no residual heat. Infralight supplies all lamp types including short wave, fast response medium wave and medium wave heating elements. The additional optical power in lamp systems allows for more flexibility to address larger spot sizes (up to 20 mm) with sufficient irradiance for curing. The broad spectrum provided by lamp-based systems (250-600 nm) makes it much easier for the curing system to provide energy at the appropriate wavelengths for the adhesive to cure. From a manufacturers viewpoint Infrared heating is fast and direct with high efficiency, infrared heating offers the operator precise control with high production, low capital costs, easily installed and flexible.
If there is an emergency stop for example, machine breakdown, a switch will disconnect the power to the heating elements. The quartz is 3mm thick and a gold coating is applied to the back of the quartz allowing 95% trasmittance of infrared heat. Infralight Technology with 20 years experience in industrial furnace design, will custom design a solution based on your manufacturing criteria. The elements are very strong, made for industrial applications, fast switching and will last for thousands of hours of normal operation. Quartz infrared tubes are the most efficient form of infrared heating because the quartz does not absorb heat, quartz is transparent to infrared light. Metal sheathed elements or similar arenot as efficient because they absorb most of the heat generated and are very slow to warm up (minutes). Once installed and commissioned, the unit will operate continuously for thousands of hours.




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