After 50 years'long development, the production line speed of color steel sheet has developed from the initial 15m/min to 240m/min. The thickness of the sheet can be between 0.15 and 2.2mm, and the maximum width of the sheet can be up to 2000mm. At the
end of the 20th century, there were more than 400 color steel plate production lines in the world, more than 200 in the United States alone, and the total production capacity of the world has reached 14 million tons.
Under the influence of American technology, in the early 1960s, many continuous production lines of color coated steel plates were put into operation in Europe and Japan. Especially in Japan, after introducing the advanced technology of the United States in the early stage, it continuously digested, absorbed, improved and rebuilt, so that the output of color steel plate increased rapidly. By the end of the 1970s, its annual output had reached 2 million tons, and rose to be the leader of color steel plate production in Asia.
In order to further promote the networking of the development of color steel sheet industry, the United States established the world's largest coil coating joint venture, the National Coil Painters Association (NCA), as early as 1962, which is the process and technology exchange of coil coating, trade of coil sheet and coating raw materials, supply of coating equipment, and sales of products. An international organization that integrates information into one. Members of the organization include manufacturers of raw materials (such as coatings, metal coils) and equipment for the production of coloured coated steel sheets. In addition to holding regular meetings to discuss and exchange information, special technical forums and new product design competitions are organized to promote the development and market development of color coated steel sheets, collect and publish statistics on production and sales, formulate and publish relevant standards, technical manuals and publications, and play an important role in the development of color coated steel sheets. Good promotion effect. At present, the number of its members has reached more than 160, from large-scale production and manufacturing enterprises of color steel plate and color aluminium plate all over the world, Baosteel Company of China is one of them, and the scale of the organization is quite large.
In Europe, coil coatings have been developed very maturely from 1960 to 1965. In 1966, there were 14 color steel plate production lines in Europe, distributed in Sweden, Germany, Britain, Belgium, Switzerland and France and other countries. In 1967, the European Coil Coating Association (ECCA) was established in Brussels, Belgium. The association is based on the development of science and technology. It consists of more than 80 coil coaters, more than 50 paint manufacturers, 40 raw material suppliers and more than 20 equipment manufacturers. The aim of the association is to research and promote the production and use of color coated steel sheets. At the end of the 20th century, the annual production of color coated steel sheets in Europe reached 3.9 million tons.