Tham khảo tài liệu 'paints, coatings and solvents episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 124 3. Paint Systems The building and construction industry is the main user of coating powders for both exterior and interior use. Coating powders have proved popular for coloring light metal facades panels and profiles on account of their outstanding weather resistance and robust surface. They also allow architects complete freedom of expression and use. New systems with extrem weatherability are introduced to the market. In the interior-use sector a diverse range of objects and parts can be powder coated. Examples include partition walls ceilings door and radiators. The coating of radiators is particularly interesting because it involves penetration of the coating powder into deep Faraday cages. The excellent impact resistance of most powder coating films is important in the building sector because the articles are roughly handled. A further important use is the coating of office and garden furniture machine parts and electrical components. Applications in the furniture sector include the coating of metal rails and fittings. The coating of steel chairs and garden furniture can be more easily automated with electrostatic powder coating than with conventional wet coating. Chairs have an unfavorable shape and so coating with wet paint can only be partially automated generally a final coat is applied manually. With coating powders however coating can be performed fully automatically. The paint film has a high scratch resistance which considerably simplifies packaging. The coating of cast is an important use in the engineering sector. Specially formulated coating powders are available for porous substrates to prevent bubble formation in the film. In the electrical industry the coating of switchboards with textured powders should be mentioned. Important requirements include satisfactory punching quality recoatability with almost all paints and constant visual properties. Further important users are the household appliance industry and the automotive parts and .
