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UV coatings have been applied to mechanical tubing, safety/water suppression pipe and OCTG/line pipe for many years. UV coatings advantages in this application can be summarized as faster, smaller, and cleaner with no thermal ovens required. The coating and curing (almost instantly) at speeds ranging from 100 feet per minute to over 800 feet ...
UV curing (ultraviolet curing) is the process by which ultraviolet light initiates a photochemical reaction that generates a crosslinked network of polymers through radical polymerization or cationic polymerization. [1] UV curing is adaptable to printing, coating, decorating, stereolithography, and in the assembly of a variety of products and ...
This is used to test the yellowing of coatings (such as white paints). The photo-oxidation of polymers can be investigated by either natural or accelerated weather testing. [ 53 ] Such testing is important in determining the expected service-life of plastic items as well as the fate of waste plastic .
Acrylated urethane oligomers are typically abrasion resistant, tough, and flexible, making ideal coatings for floors, paper, printing plates, and packaging materials. Acrylated polyethers and polyesters result in very hard solvent resistant films, however, polyethers are prone to UV degradation and therefore are rarely used in UV curable material.
Ultraviolet (UV-A) radiation of adequate intensity (1,000 micro-watts per centimetre squared is common), along with low ambient light levels (less than 2 foot-candles) for fluorescent penetrant examinations. Inspection of the test surface should take place after 10- to 30-minute development time, and is dependent on the penetrant and developer ...
UV testing is a component of aging tests designed to simulate the long-term effects of ultraviolet (UV) radiation exposure on materials, products, and coatings. [3] UV radiation, a component of sunlight, is one of the primary contributors to material degradation over time.
The process is an alternative to the conventional Claus process that operates at 800–1,000 °C (1,470–1,830 °F). [29] A Fe catalyst combined with a Cu light absorber can produce hydrogen from ammonia (NH 3) at ambient temperature using visible light. Conventional Cu-Ru production operates at 650–1,000 °C (1,202–1,832 °F). [30]
The UV dose should be calculated using the end of lamp life (EOL is specified in number of hours when the lamp is expected to reach 80% of its initial UV output). Some shatter-proof lamps are coated with a fluorated ethylene polymer to contain glass shards and mercury in case of breakage; this coating reduces UV output by as much as 20%.