1、High precision roller of coil-coating is fastidious to materials---the surface of the materials must be very clean and even.
The above is a microcosmic sketch of coil-coating technics. These apparent flaws, scuffings blemish (lack of paint) will be found easily in the process of production by quality-inspector. Panels with these flaws will not reach customer`s hands.
The above is a microcosmic sketch of spray-coating technics. These defects are hardly found and panels with these defects certainly would reach customer`s hands.
2、Even Coating As the roller of coil-coating is produced by high precision equipment (precision: ±1μm), the coating is very even when coil coating. The coating thickness tolerance is less than ±1μm. All kinds of stress is always even. In other words, the microcosmic array of coating is uniform that can make the whole panel even in every aspect, such as ultraviolation resistance, absorbing and reflecting all kinds of rays. Though all pigments will be fading after a period, it only appears wholly fading. By spray-coating and other coating methods, it is very difficult to make even coating owing to their restriction of technics and equipment. The tolerance is usually ±5μm, sometimes the tolerance is more than ±10μm. It is not uniform motion when coating and the microcosmic array of coating is in disorder, so ultraviolation resistance, absorbing and reflecting all kinds of rays are not uniform. The color of surface will become uneven while exposing in sunshine.
3、For popular metallic paints, coil-coating enjoys more advantages The metallic colors are favored by more and more customers and architects. Especially, the Silver Metallic and Bright Silver Metallic are accepted by the majority. Metallic color pigments usually use metallic powder as paint, and the shape of metallic powder is flake, piece and polyhedron. After roller acting on, metallic powder is converted, and evenly regularly arrays in resin. Electrostatic spray-coating stand up in resin because of electrostatic and current acting on, the top of metallic powder, where the resin coating is very thin and easily corroded.
4、Environmental Protection As the coil-coating technics will not produce paint fog in the process of coating, the efficiency of paint is very high. For spray-coating, it will produce paint fog, which not only contaminates the environment but also wastes the expensive paint. All ALUTILE® Composite Curtain-Wall products adopt coil-coating. Jiangxi Hongtai Group Co.,Ltd. possesses two sets of advanced coil coating production lines.