Bonding equipment radiation curing

After evaporation of the solvent, the coatings are thermally or radiation cured. Radiation cure has been carried out with a medium pressure mercury lamp for 1, 3, 5, 8, 10, 13, 15, and 20 seconds in both the absence and the presence of a photosensitizer. The curing proceeds for several seconds in the absence of a photosensitizer, and very fast in the presence of benzophenone, a common photosensitizer. The two conjugated triple bonds of the linear polymers evidently require very low energy and easily cross-link with standard coatings equipment for radiation cure. The coatings, cured at radiation time longer than 10 seconds, have a pale yellow color. The thermal cure (without radiation) proceeds at 100 C for about 15 minutes. 

Radiation-source In bonding technology, equipment for the curing of UV-electron beam and light-curing adhesives. 

Engineering acrylic adhesives are two-part systems which, when mixed or activated, polymerise (cure) to form an impact-resistant plastic layer which is well adhered to the surfaces of the adherends. The activator for the curing process may be a chemical (either mixed with the adhesive or applied to the adherend surfaces prior to the adhesive), or, for some varieties, UV or electron-beam radiation. The toughened or modified engineering adhesives have been widely used since the 1980 s in vehicle construction, wood to metal bonding, aerospace applications, panels and computer equipment. 

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