Analysis of Common Quality Problems in Aluminium Plastic Panel Curtain Wall Engineering
ã€China Aluminum Network】 1. Discoloration and fading of aluminum-plastic panels are primarily caused by improper selection of materials. Aluminum-plastic panels are typically categorized into indoor and outdoor types, each with different surface coatings designed for specific environments. Indoor panels usually feature a resin coating that is not suitable for harsh outdoor conditions. If used outdoors, these panels tend to age more quickly, leading to discoloration and fading. On the other hand, outdoor panels are coated with fluorocarbon resin, which offers strong resistance to UV rays and aging. These high-quality panels are more expensive, but some contractors have been known to mislead clients by using cheaper indoor panels instead, cutting corners to maximize profits. This has led to serious discoloration issues in many projects. 2. Another common problem is the peeling or separation of aluminum-plastic panels, often due to the use of inappropriate adhesives. Silicone rubber is considered an ideal adhesive for outdoor applications because of its durability and weather resistance. In the past, China relied heavily on imported silicone, making it costly and only used in high-end curtain wall projects. However, with domestic production now widespread in cities like Zhengzhou, Guangdong, and Hangzhou, prices have dropped significantly. As a result, many sellers now recommend fast-drying adhesives that can be used both indoors and in unpredictable outdoor climates. 3. Surface deformation of aluminum-plastic panels is another issue, often caused by warping or bulging. Initially, this was thought to be due to poor panel quality, but further analysis revealed that the main cause lies in the bonding between the panel and the substrate. Many contractors still use low-quality base materials like wood or high-density boards, which are not durable enough for outdoor use. After exposure to wind, sun, and rain, these materials deform, causing the panel above to warp as well. To prevent this, it’s recommended to use rust-proof metal frames such as angle steel or square pipes. If possible, aluminum profiles should be used for the skeleton, as they offer better stability without significantly increasing costs. 4. Lastly, when installing aluminum-plastic panels, gaps between the panels are filled with black sealant for aesthetic purposes. Some workers skip the step of using masking tape to keep the sealant neat, instead using the protective film on the panel’s surface as a substitute. However, this often leads to uneven application and tearing of the film during cutting. Proper techniques, including the use of masking tape, ensure cleaner joints and a more professional finish. Aluminum-plastic composite panels are made using specialized equipment, combining chemically treated aluminum sheets with a polyethylene core. Their unique properties make them ideal for a wide range of applications, including building facades, curtain walls, interior decoration, signage, and more. As a modern and versatile material, aluminum-plastic panels have become increasingly popular in China's construction industry. Understanding their proper installation and maintenance is key to ensuring long-term performance and aesthetics.
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