UV powder coating

UV-curable powder coating is one of the fastest coating chemistries available. From start to finish the entire process for finishing MDF takes 20 min or less, depending on chemistry and part geometry, making it an ideal finish for applications that require a quick turnaround. A completed part requires only one coat, allowing increased production with 40 to 60 percent less energy than other finishing processes. The UV-curing process is much simpler than other finishing technologies. Curing of a liquid finishRead More …

Now the increasingly high demand for environmentally friendly, waterborne coatings, powder coatings, high solids coatings, and radiation curable coatings and other energy-saving, low pollution paint varieties of universal concern, a major paint company focused on research projects and product development. Conventional powder coatings for metal materials because of its high curing temperature only, while the UV curing powder coatings because of their low curing temperature, the apparent flatness can be applied to various types of thermal materials. Also a smallRead More …

Even though UV curing has been used commercially for over thirty years (it is the standard coating method for compact disk screen printing and lacquering for example), UV coatings are still relatively new and growing. UV liquids are being used on plastic cell phone cases, PDAs and other handheld electronic devices. UV powder coatings are being used on medium density fiberboard furniture components. While there are many similarities with other types of coatings, there are also some key differences. SimilaritiesRead More …

Powder coating provides a durable, attractive and economical alternative to liquid paints and laminates for a wide range of heat-sensitive products such as glass and plastic materials. Powder coatings are dry, 100 percent solids paints that are spray-applied in a process similar to liquid painting. Once coated, products are conveyed through a curing oven, where the powder melts to form a durable, attractive finish. Powder coatings have long been the finish of choice for lawn & garden equipment, home appliancesRead More …

The radiation-curing process is based on two chemistries: the radical polymerization of unsaturated oligomers (mainly acrylate functionalized) and the cationic polymerization reaction of cycloaliphatic epoxides and vinyl ether. Typical liquid radiation-curing formulations are composed of oligomers, reactive diluents, photoinitiators and additives, the general performance of the final coating mainly influenced by the oligomers. The oligomers are characterized by a relatively low molecular weight (between 500 and 5,000 daltons) and are based on different types of backbones: epoxyacrylates, urethane acrylates, polyestersRead More …

UV powder coating users were asked to prioritize their key motivations for using the technology. Speed is the number-one answer, cited for its contributions to improved productivity, lower costs and its ultimate effect of raising manufacturing capacity. Environmental compliance used to be the prime motivator for using the technology but, while still important, ranked lower in the most recent survey. Respondents stressed that the use of UV is based on business decisions related to profitability and value, and because inRead More …

Ultra-low bake (ULB) and ultraviolet (UV) Which is Better? The choice of whether to use UV or ULB powders primarily depends on the requirements of the application. Generally, ULB powders are recommended for lower-performance end uses (e.g., TV stands shelves, etc.) as they meet the furniture standards for “general use.” Also, compared to UV powder coatings, ULB powders offer a broader color range and a lower cost per square foot coated. Some colors, such as deep yellows, are difficult toRead More …

Substrates such as wood, plastics and medium density fiberboard (MDF) are sensitive to heat (thermal expansion) and cannot be coated with conventional powder coatings. Consequently liquid coatings, foils and laminates have been used for their decoration and protection, especially in the furniture industry. In recent years, the development of ultra-low bake (ULB) and ultraviolet (UV) powder coatings for these substrates has allowed a dramatic reduction or even elimination of these traditional systems, resulting in new benefits for manufacturers. The woodworkingRead More …

The powders can be sprayed on most MDF types using conventional corona or tribo charging guns. In the latter case, the addition of a tribo additive to the formulation is recommended. Applied layer thickness is between 35 and 100 um, depending on the type of application. Pre-heating of the board can aid powder application in some cases. Heating To melt the applied powder efficiently, medium wave infrared radiation (IRM) is used. Further flow out is achieved by using a combinationRead More …

UV powder coating technology offers a fast, clean and economic attractive method to achieve high-quality finishes on wood-based substrates. The coating process consists of the following steps: First the article is hung or placed onto a conveyor belt and the powder is sprayed electrostatically onto the object. Then the coated object enters the oven (temperatures of 90-140 degC are sufficient) where the powder melts and flows together to form a film. This step takes 30-150 seconds, depending on the desiredRead More …