Knowledge base

The absence of solvents and the possibility of complete elimination of VOC emissions belong to the main advantages of UV curable coating materials. Additionally, the overall expenditure of radiation curing technology is lower due to reduced requirements with respect to processing time, place, and energy needed for curing as well as for solvent remo

For over three years LTS has been successfully using the UV Flexopnnt process for its pharmaceutical packaging. In the summer of 1996, after a practically two year trial phase, LTSdecided in favour of this printing process. Up to this point in time, all packaging for our transdermal systems had been purchased externally from rotogravure printers. T

The time behavior of kinetic constants during dark reaction after cutting off the irradiation of a multimethacrylate-based polymerizing system was studied. The initiation was stopped at variousdegrees of double bond conversion. The kinetic constants were determined from three terminationmodels: monomolecular, bimolecular and mixed. Discussion conce

The formulation of UV curable printing inks depends on several complex factors. If the individualcomponents of the ink are not complementary, then performance problems can arise. One critical combination is that between the pigment and the oligomer. In a new approach to improve understanding of pigment/oligomer interactions, the resources of a pigm

Kinetic studies of viscous dimethacrylates copolymenzed with reactive diluents are complicatedby the fact that both initial viscosity and monomer structure play important, and sometimescompeting, roles in the diffusion controlled kinetics of these photopolymerizations. However, onecan separate the effects of viscosity and monomer structure by utili

The abrasion resistance of UV cured coating was studied as a function of coating resins composition, crosslink density and mechanical properties. The molecular and mechanical properties correlation with abrasion resistance was monitored as a function of time of exposure to harsh environments such as ultraviolet light, or high temperature and humidi

Urethane acrylate oligomers are being used in a growing extent in many different applications where UV technology takes place. In order to develop coatings with predefined properties, relationships between the physico-chemical characteristics and the "applióative" (or functional) properties of the photocured material are required. In this paper, se

Energy cured inks and coatings have been used for many years to print food packages but because the technology is still perceived as new and chemically complicated, it has been the burden of the formulator to fully prove its suitability for the end product. Much work has been carried out to ensure the efficient curing of the system but many times t