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UV Curing of Coatings for Automotive Plastic Parts
source:未知 date: 2019-08-29 11:30 hits:
1. Automobile lamp shade: Polycarbonate lamp shade has replaced glass lamp shade for a long time. Polycarbonate has the advantages of easy processing, light weight and flexibility, and is not easy to break, but its surface strength is not enough, it is not resistant to scratch and scratch, and its weatherability is poor, and it is easy to yellowing. The surface properties can be improved by using photo-curable coatings. With this coating, not only the coating time is greatly saved, but also the coating has good optical abrasion resistance and can meet the requirements of long-term weatherability.
2. Reflector: Automotive reflector is also made of plastic, but its surface must have high reflectivity. In order to achieve this goal, the plastic surface must be treated by three times of ultraviolet irradiation. Firstly, the surface of plastics should be photochemical reactions to increase surface tension to facilitate the leveling and adhesion of UV-curable coatings. After curing with coated UV-curable varnish, the surface of plastics becomes flat and easy to metallize, and then metal deposition is completed in the vacuum depositing box. After metallization of the plastic surface, another layer of light-curing coating is needed. Its function is to protect and expand the metal reflective layer.
3. Glass Fiber Reinforced Composite Components: Composites have been widely used in various parts of automobiles. In order to protect the surface and beauty, coatings are required. For example, the body part of the model racing car is made of composite materials cured by electron beam and modified by light curing paint. One of the key problems in using light curing coatings on large parts is to design a coating and curing room which is convenient for the whole body painting.
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