A comprehensive overview of the chemical background of radiation curing, the most common raw materials used in the industry, their main properties and how they interact, market trends and applications.
This package contains all the presentations that were given at the RTE Metal Coatings Seminar 2011, held at OCAS N.V. in Belgium.
While UV & EB technology is already used in a wide variety and increasing number of industrial segments, RadTech-Europe envisions UV/EB technology to gain a still broader acceptance throughout the European Industry. RadTech members are confident that UV/EB technology will be recognized as one of the leading technologies for VOC reduction and economic developments in the future. Through conferences and seminars they will share and learn about cutting-edge developments, areas of application, conditions and standards of use.
During this two-day curing event titled “RTE Metal Coatings Seminar” in collaboration with OCAS, field experts of coating suppliers and manufactures, and end-users enabled interested applicants of UV/EB to learn about the state of the art of chemicals, formulations and equipment for metal, can and coil coating. Case studies underlined the present possibilities.
Introduction to Radiation Curing Chemistry and Technology
OCAS (OnderzoeksCentrum voor de Aanwending van Staal) is an advanced, market-oriented research centre providing steel and metal based products, services and solutions, to metal processing companies worldwide. OCAS anticipates its customer’s needs to realize breakthrough developments and is equipped with state-of-the-art R&D tools in its laboratories in Zelzate and Zwijnaarde (Belgium). The research centre is also setting up new industrial spinoff activities. OCAS has a highly qualified team of over 130 researchers and engineers with an international orientation. OCAS is a joint-venture between the Flemish Region and ArcelorMittal.
Effects of European directives on metal coating application
The VOC Solvent Emission Directive (1999/13) and the VOC Paint Directive (2004/42/EC) are instruments to reduce solvents in installation application and in the open air. In architectural paints and in vehicle refinishing coatings VOC limits stimulate new paint developments like high solids, water based products, two components and radiation drying products. What can we learn out of the last 10 years developments for the metal coatings industry? What are the possibilities of radiating drying products at this paint application?
UV cured coatings for household appliances and decorative panels
The requirements in terms of surface quality and resistance against mechanical and chemical stresses that the household appliances and decorative panels industries sets for coated metals are extremely high. These specifications may be difficult to meet, especially for stainless steels with “anti-fingerprint” coatings. UV-cured varnishes allow stainless producers to meet their customers’ demands. The UV curing process prevents temperature-related yellowing of the metal surface (thermal aging), thus avoiding the “plastic-like” appearance of thermal coatings; the high degree of cross-linking of the polymers yields extremely high surface hardness and scratch resistance, while allowing the necessary ductility needed for bending and drawing operations; UV-cured varnishes also provide good protection against aggressive chemicals.
UV cured Base Rim Coatings for Beverage Cans
UV cured coatings are now widely used for base rim coating on beverage cans. They are well suited to this high speed application given their fast cure and 100% solids. They provide corrosion protection for steel and mobility for aluminium cans to aid the drive for faster manufacturing and filling line speeds. The paper will provide an introduction to beverage can manufacture and outline the vital part now played by UV technology in this process in enabling the increases in efficiency attained.
The Growth of UV Curable Inks and Coatings for sheet fed metal packaging
As with most sectors of the packaging industry “Metal decoration” has undertaken to re-invent itself addressing critical issues such as, Emissions/ environmental effects, Applied costs and Productivity. This paper concentrates on “Sheet fed” or “Flat Sheet” metal decoration where significant progress has been made in introducing UV curing ink and coating technologies in recent years. We examine the drivers and advantages of using radiation curing, as well as looking at further challenges we face as the growth of Radcure technology continues in this market.
UV Trends in metal decorating for flat and 3D substrates
UV ink- and UV coating-applications are well established alternatives to solvent based applications with traditionally used hot air ovens in metal decorating for flat sheets. This paper reflects the expert knowledge of IST during the last years with regard to different UV curing solutions for single and multi colour metal decorating lines and the processes and applications behind it. We give you a prospect and first experiences to three dimensional substrates and point out possible added values for the customers with UV in general.
UV lamp systems - Meeting the challenges for metal coating applications
UV curable coatings are used in a wide range of metal coating and decorating applications. From sheets to cans and 3-dimensional parts to coil all have established successes with UV curing technology. Among the key drivers for the implementation of UV curing are faster processing speed, reduced space requirements and environmental benefits, including reduced VOC emissions and improved energy efficiency in curing the coatings. For these processes to be successful, requires a partnership between the end user, the coating formulator and the UV lamp supplier; working together to design an installation that delivers, as efficiently as possible, the required UV energy to the coating on all areas of the part or substrate. This paper will review the key environmental benefits of a UV installation and look at the design of UV installations for a range of metal coating applications and discuss the critical parameters to deliver a successful UV curing process.
UV-Curing coating technology for Daimler truck axles
Up to now the application of UV-curing technology for coatings is limited of little parts with simple 2D-geometries. Moreover the pigmented UV-curing coating systems are hardening in thicknesses until few micrometers. To reduce VOC-emissions in Gaggenau Plant a Daimler AG project team developed in collaboration with Wörwag Company and Sturm Company an UV-curing coating process for heavy truck axles with voluminous and complex shapes without releasing VOC. Challenges in this case of painting are ambitious quality requirements - particularly corrosion protection - and reduction of total costs.
Pipe protection with UV cured coatings
The integration of UV technology in the coating process of round steel tubes offers an innovative, high performance solution for temporary corrosion protection. The surface quality of the solvent free, 100 % UV coating, the fast curing time as well as an overspray recovery rate of more than 95 % are impressive features, which, by their very nature, offer high economic efficiency and environmental friendliness.
Gloss Control Method Using Lamination Film
Recent work has been done to evaluate the feasibility of controlling the gloss level on metal coatings through the use of lamination film. A range of curing conditions and film types have been evaluated and the results will be presented. The configuration of an EB system capable of using this method will also be shown.
Improving the value of steel through UV curable coatings
It is well known that processing UV-curable coatings leads to reduced energy and environmental costs by the absence of solvent or water. Beyond this process-related advantages, the technology allows developing new coatings with unique combinations of functions. OCAS has developed these last years several coating systems allowing to improve the value of different steels grades. Examples leveraging unique features like direct adhesion to metal, or the synergy between flexibility-hardness will be shown.