The coloration covered aluminum roofing sheet 3003 3004 3104 3105 is colored coated at the raw fabric aluminum sheet or coil that implemented on roofing assemble. Consistent with the exceptional coatings, there are many forms of merchandise inclusive of PE and PVDF, the performance is solid and the carrier life is long.
The colour coated Aluminum roofing sheet is processed by using washing, chromizing, rolling lined, baking, etc., so that the surface of the aluminum roofing sheet is covered with paint of diverse shades.
1, cleaning and pretreatmentThe pretreatment of the aluminum roofing sheet is repeated by using the water jet spray. This technique is greater effective than the traditional method, and the water can be reused to reduce the strength intake. A pretreatment level is important to improve the corrosion resistance of the coloration coated aluminum sheet and to improve the adhesion of the coating. At this level, the conversion film is chemically fashioned on the aluminum surface, and effective technique era is used to improve product exceptional and decrease useful resource waste.
2, roll coatingThe shade coating aluminum sheet coating method is especially divided into two degrees, particularly, primer coating and top coating. In first stage, the aluminum roofing sheet passes thru a roll coater and is lined on one or each aspects with a primer. After drying, the aluminum sheet coil is passed via two roll coaters, at which time the aluminum sheet roll is coated on one or both aspects.
Three, curingThe colour lined aluminum sheet is exceeded through a curing oven and the temperature is about at a regulated temperature to make certain that the volatiles are eliminated and the coating is completely cured. In step with the needs of the coating machine, the curing temperature is set among two hundred and three hundred stages Celsius, which is the key technical factor to make certain product great. In addition, which will guard the surroundings and manipulate expenses, the mist of the solvent is evaporated through excessive temperature to heat the curing oven.
4, follow-up processingThe colour coated aluminum roofing sheet can be in addition processed into different shapes: rolling shutters, slitting or compression pattern.