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Structural characteristics of aluminum plastic composite plate aluminum plastic plate

The aluminum-plastic plate consists of two layers of 0.5mm-thick aluminum plate inside and outside, with 2-5mm-thick aluminum plate sandwiched in the middle, and the surface is roller coated with a very thin fluorocarbon spraying finish

The composite board is characterized by uniform color, flat surface and convenient manufacture. However, the disadvantage of the composite board is that the interlayer in the middle of the composite board contains toxic components, which releases toxic gas when burning or reaching high temperature, which pollutes the environment when used on the inner and outer walls. At the same time, the aluminum plate and PVC interlayer are cemented and pressed, and their composite strength is not high. A pull between the two layers can separate the aluminum plate and the interlayer. Lehua aluminum plastic plate


In addition, due to the thin aluminum plate and local heating, the middle interlayer is easy to expand, making the aluminum plate bulge outward. From the point of view of curtain wall lightning protection, aluminum composite plate is formed by two layers of 0.5mm thick aluminum sheet and polyethylene pressure bonding. Polyethylene is a bad conductor, and two layers of aluminum sheets are insulated. Although aluminum alloy sub frame is added in the inner layer during the production of composite aluminum plate, rivets and the upper bending four sides of aluminum composite plate are fixed and connected; Because the riveting surface is too small, more importantly, the 0.5mm aluminum sheet is too thin. In case of lightning, the large flash current will break through the 0.5mm aluminum sheet when the building develops laterally and strikes the curtain wall plate. The strong current is difficult to be grounded through the composite plate, causing the building to be struck by lightning. Lehua aluminum plastic plate


From the production and installation of aluminum-plastic composite plate: the production of aluminum-plastic composite plate is first slotted on the four sides of the composite plate, cut off a certain width and one aluminum plate and plastic layer, leave only 0.5mm thick outer aluminum plate, bend the four sides into a rectangle at a 90 ° angle, and then make a rectangular sub frame of the same size with aluminum-plastic material, place it in the rectangular groove of aluminum-plastic plate, glue the back of aluminum-plastic plate on the bottom surface of the sub frame, and fix the bent four sides of the composite plate on the four sides of the sub frame with pull riveting, In the middle of the rectangle, one to several aluminum profile stiffeners are pasted with structural adhesive. At present, most installation and production units do not manufacture according to the above methods, but bend the upper edge into a 90 ° angle after slotting the aluminum composite plate, and only add angle aluminum to fix it on the four folded edges of the composite plate. In this way, the dead weight of the plate surface and any external force and load are borne by the four 0.5mm aluminum plates, with small safety. Any curtain wall is subject to different positive and negative wind load pressure at any time, and 0.5mm on the four sides of the plate surface is easy to break. This phenomenon has occurred in most projects. Therefore, aluminum alloy sub frame and stiffener must be added in the production of aluminum-plastic composite plate curtain wall. Curtain wall aluminum plastic plate


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