Study On UV-Curing Of Epoxy Acrylate Adhesive

UV-radiation curing has become a well-accepted technology, replacing the conventional curing process in the development of new products. This technology has low energy consumption and high productivity, making the industrial process more efficient. Because of its distinct advantages, has found manifold industrial applications, mainly as coatings, printing inks and adhesives. One metallizing method capable of efficiently coating a thin layer of metal on a substrate is the vacuum metallizing process wherein aluminum is evaporated in a vacuum chamber and condensed onto a surface of the substrate material. Firstly, vacuum metallizing method is capable of efficiently coating a thin aluminium layer onto a plastic film surface to provide a smooth film. Secondly, the thin aluminium layer is spreaded on UV-curing adhesives and adhebit a substrate material. Lastly, the aluminium layer and the plastic film are peeled off, the aluminium layer transfer to the substrate material by the adhesive adhesion. In this paper, through a lot of experiments, photoinitiator and reactive diluent was acquired, with preferable adhesive performance. The influence of photoinitiator, reactive diluent and oxgen inhibition was studied.Epoxy acrylate was synthesized in laboratory, using 1:0.9 molar ratio of bisphenol-A epoxy ( epoxide value = 0.51mol / 100g) and acrylic acid in presence of triphenyl phospinine as catalyst ( 1 ppm by weight of resin ) and hydroquinone ( 0.5ppm ) as inhibitor. The objective of this work was to evaluate the effect of molar ratio, the mode of sends material, temperature et al.The paper used FTIR to monitor the curing progress and studied the effects of photoinitiators on the relationship of exposure time and conversion. The result has shown that proper combination of different initiators having various characteristic absorbent wavelengths will enhance the utility of UV-light source and improvement of curing rate. The hydrogen abstraction-type photoinitiator has lower activity than the photocleavable initiator, a-hydroxy ketone (IHI-HPI 1173) has lower activity than...