Knowledge base

Concerns for the planet and the ensuing environmental legislation have not been theonly factors that have led to the rise of radiation-curing coatings over the past 20 years.Technical advances too—in the development of new raw materials, coatingsformulations, and methods of application and curing—have also played a major role inthe spread of this f

One of the challenging things in the UV-curing industry is the curing of whitepigment coatings. Due to the high absorption of the rutile 2 that covers the UVspectrum's region from 200 nm to 380 nm (1), photoinitiators in white pigment formulationscan not receive photons from a light source efficiently. As a result, people have the problemof how to

The object of this study is radiation curable pressure sensitive adhesives,PSAs, which are prepared by reacting one or more hydroxy polyesterswith a prepolymer having acrylate and isocyanate functionality. Typicallythe OH:NCO ratio is larger than 2:1 so that all the isocyanate groups arereacted and the resulting uncured product carries hydroxyl gro

Flexographic technology has gone through dramatic developments in recent years. Thedevelopment of UV-Flexoprinting on wide-web central cylinder presses was asignificant milestone in these developments in the early 90' s. The first success wereachieved when the German companies Kobusch (Warburg) and Sengewald(Halle/Westf) switched to UV-inks, and th

The concept of regulatory affairs is not so old. In fact it came from the US and wasimplemented in the European Union in 1967.Before 1967, a lot of freedom was given to the chemical companies; each new product waspermitted and the manufacturer was his own master: he decided which information wasgiven to the customer regarding the hazardous properti

Due to environmental and legislation constraints the coating industry is movingthrough a major evolution. Low solids, solvent containing paints are decreasing inimportance. As a result of this increasing pressure to reduce VOC's, UV curablecoatings are experiencing an important growth in the marketplace. In some applicationfields like for instance

Radiation curing is considered to be the most environmentally friendly technology for thepolymerisation of films, due to the limited use of energy involved in the curing process andto the limited amount of volatile organic compounds (VOC) employed in the process.Though the release of VOC in the radiation curing process is several orders of magnitud

Radiation curing in the form of ultraviolet emission for use in the graphic arts,wood treatment, and chemical polymerization field has become quite commonnowadays. What is less common is the directional and controlled emission fromhighly focused lamp sources, more commonly known as 'spot curing'.Radiation curing sources take advantage of the high p