3105 Painted Aluminum Sheet for Bottle Cap

Color coated aluminum is a new product in the aluminum processing industry. Aluminum processing is to produce various forms of products such as aluminum sheet, aluminum strips and aluminum foils from aluminum ingots through a variety of processes and procedures.

According to the different performance and application fields, color-coated aluminum can be divided into two categories: functional type and ordinary type. Ordinary color-coated aluminum is a substitute for traditional building materials; functional color-coated aluminum is a coated aluminum made of a certain type of aluminum substrate and a specific organic coating. 3105 painted aluminum sheet is one of the commonly used bottle cap materials.

The purpose of aluminum sheet coating is to form a firm and continuous coating on the surface of aluminum sheet through coating construction, so as to play its decorative, protective and special functions.

Since the middle of the last century, coil coating has been mainly roller coating. The production of color coated aluminum sheets is carried out by a precision coating machine that evenly coats the surface of the pre-treated aluminum sheet with the same thickness of coating, and then enters the oven with exhaust device at a uniform speed, and uses infrared or hot air circulation baking process for baking and curing. At a specific temperature, the film is cross-linked to obtain a complete coating film with a certain thickness.

Roller coating uses the coating roller as the carrier of the coating. The coating forms a wet film of a certain thickness on the surface of the coating roller. With the help of the coating roller contacting the aluminum sheet during the rotation process, the coating is applied to the surface of the aluminum sheets. Roller coating is suitable for coating flat metal plates, especially for high-speed coating of metal coils. Roller coating has the characteristics of fast coating speed, high production efficiency, simultaneous coating on both the front and back sides, and coating utilization rate close to 100%.

However, roller coating is only suitable for flat coating, not for objects of other shapes. Since the roller coater adopts a unified paint circulation, transportation and recovery system, the amount of paint input is large, which is not suitable for multi-variety and small-batch production. The paint is transferred to the surface of the object in the form of a wet film on the surface of the coating roller. The solvent evaporates quickly, and the viscosity of the paint is prone to change during the roller coating process. If the process conditions are not properly controlled, roller marks are likely to appear on the coating film. Haomei Aluminum has mature processes to ensure the quality of painted aluminum sheet for making aluminum bottle caps.

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