Color coating steel coil (PPGI steel coil or PPGL steel coil ) is beautiful in color, easy to process, has good corrosion resistance, and is economical and practical. With the expansion of its application fields, the increase in market demand, and the improvement of users’ requirements for its variety, quality, and performance, the production capacity of color coating steel coil has expanded rapidly. New products of color-coated steel coil have been developed to achieve differentiated quality production and meet users’ personalized quality. It is the development direction of mainstream steel enterprises. The color-coated sheet production technology was first created in the United States in 1927 and has developed rapidly since the 1960s.
The basic structure of color coating steel coil comprises steel sheet (including coating), chemical treatment film, coating film, and protective layer film. The commonly used color steel coil production processes mainly include spraying, roller coating, lamination, printing, and dyeing. Sometimes different processes can be completed alternatelsimultaneouslyuction line simulating in special effects. Its production technology has also gradually developed, from single-sheet production to continuous production lines and from continuous coating production lines to multi-process combination production lines.
The process flow is: uncoiling – cutting head – cutting tail – stitching – deburring – grinding – degreasing treatment – squeeze drying – looper – phosphating treatment – water washing – squeeze drying – passivation treatment – squeeze drying – one coating – One drying – one cold baking – cooling – drying – second coating – second baking – embossing or printing – cooling – drying – waxing – coiling.
