Knowledge base

At the present time, UV inks offer many advantages compared to conventionalsolvent based inks. It remains that UV inks have to meet a lot of applicativecriteria. Primarily, an ink has to exhibit the right colour strength and the rightrheology (good flow for instance). These two parameters are interrelated.Moreover, inks must be solvent/stain resist

One can distinguish between two types of water based UV screen ink formulations:1- Water cleanable UV inks (do not contain water in their original formulation)2- Water based UV inks (containing water in their original formulation)Let us examine the advantages and disadvantages of these systems and see their relativeapplications by comparing the thr

Since about 200 years, UV-radiation is known as a part of the sun radiation andnearly exactly one hundred years ago, systemcatical experiences with UVradiationin medical research began (Finsen, 1896). The first remarks about skindeseases, caused obviously by UV-radiation, are about 75 years old. A lot ofinvestigation has been done in the 30's (meas

Radiation curable silicone release agents are established commercial productswith an expanding share of the silicone release coating market. UV curable siliconesystems based on cationic photocrosslinking technology consist of cyclohexylepoxyfunctionalpolydimethylsiloxane (PDMS) plus compatible iodonium photocatalysts (1-4).The polymers are produced

One of the major problems in the packaging of foods and similar products is theprotection of the content against oxygen. Good oxygen barrier properties are essentialfor achieving a long shelf life for the packaged products. However, mostof the common polymer packaging foils have high gas permeabilities. Better barrierefficiency can be obtained only

The original idea behind radiation curing—the in-situ polymerization of a solventfreecoating material by high-energy radiation—ran up against two technicalproblems:o the low molecular components of the systems usedo the lack of volumetric shrinkage in 100%-systemsWood varnishes have to exhibit volumetric shrinkage to be able to enhance thesurface s

The "classic" electron beam technology, which began in the early 50's, made use ofaccelerating energies in the voltage range of 300 to 800 kV. The first EB processors builtfor the curing of coatings operated at 300 kV. Most EB applications which weresuccessfully developed in the 50's and 60's were for crosslinking of plastic materials andrequired h

The use of vinyl ethers as reactive diluents for cationically cured UV formulations was one of the key factors in the original development of these systems. The fact that they homopolymerise cationically was of unique advantage in their use as reactive diluents for epoxy oligomers. Their remarkable diluency, compatibility and reactiv