Discoloration and decolorization of plastic panels
The discoloration and decolorization of aluminum-plastic panels are mainly caused by improper selection of plates. Aluminum-plastic panels are divided into indoor boards and outdoor boards, and the surface coating of the two boards is different, which determines their application to different occasions. The surface of the plate used indoors is generally sprayed with resin coating, which can not adapt to the harsh natural environment outdoors, and if it is used outdoors, it will naturally accelerate its aging process and cause discoloration and decolorization. The surface coating of outdoor aluminum-plastic panels is generally made of anti-aging, anti-ultraviolet ability of polyfluorocarbon coating, which is expensive. Some construction units deceive the owner by using indoor plates to impersonate anti-aging, anti-corrosion high-quality fluorocarbon plates to extract unreasonable profits, resulting in serious discoloration and decolorization of aluminum plates used in the project.
Plastic board opening, peeling
The opening and falling off of aluminum-plastic panels are mainly caused by improper selection of binders. As an ideal binder for outdoor aluminum-plastic panel projects, silicone glue has unique superior conditions. In the past, China's silicone glue mainly relied on imports, and its value was prohibitive for many people, and only those expensive curtain wall projects on high-rise buildings dared to care. Now, China's Zhengzhou, Guangdong, Hangzhou and other places have successively put into production different brands of silicone glue, resulting in a sharp drop in prices. Now, when buying aluminum-plastic panels, the seller will recommend that special quick-drying glue. This kind of glue can be used indoors, and when used outdoors in climate change, the board will open and fall off.
Deformation and drumming of the surface of aluminum-plastic panels
Walking around any city, it is not difficult to find some aluminum-plastic panel surface deformation, drumming of those big scenery projects. This phenomenon is also found in small façade decoration projects, as well as in large high-rise buildings. In the past, in the construction, there was such a quality problem, which we thought was the quality of the plate itself; Later, after everyone's concentrated analysis, it was found that the main problem was in the base plate of the aluminum-plastic panel, followed by the quality of the aluminum-plastic panel itself. Dealers often provide us with the construction process of aluminum-plastic panels, and the recommended base materials are mainly high-density boards, woodworking boards and the like. In fact, when such materials are used outdoors, their service life is very fragile, and after wind, sun and rain, it will inevitably produce deformation. Since the base material is deformed, then the aluminum-plastic panel as the surface layer has no deformation reason? It can be seen that the ideal outdoor base material should be formed into a skeleton after the angle steel and square steel pipe are formed after anti-rust treatment. If conditions permit, it is more ideal to use aluminum profiles as skeletons. The cost of the skeleton made of such metal materials is not much higher than that of wooden keels and high-density plates, which can indeed ensure the quality of the project.
The aluminum-plastic panel is neatly seamed
When the aluminum-plastic panel is decorated on the surface of the building, there is generally a gap of a certain width between the plates. For aesthetic reasons, the gap is generally filled with black sealant. In order to save time, some construction personnel do not use paper tape to ensure the neatness and regularity of glue, but use the protective film on the surface of the aluminum-plastic panel as a substitute. Since the aluminum-plastic panel will produce different degrees of tearing when the protective film is cut, it is impossible to use it as a substitute for protective tape, and it is impossible to clean up the glue seam.
Common quality problems in the process of aluminum-plastic panel composite and their solutions
There are two main aspects of the quality problems often occurring in aluminum-plastic panels, one is the quality of coating; The second is composite quality. The coating quality problem appears in the pretreatment and coating baking paint processing process of aluminum plate, and the composite quality problem is mainly the technical problem and management problem in the composite process. Some of these problems are influenced by a single factor, and some are influenced by multiple factors. The quality problems in the process of aluminum-plastic panel composite mainly include board bubbling, board surface speckle, ruffles and poor adhesion, which are analyzed and discussed below.
