The GB86-63 high-grade aluminum profile material with thickness above 1.5mm is a guarantee of high strength. The module cavity structure is designed to accommodate the negative pressure and balance requirement. PA66 double-spiral is adopted to guarantee a similar thermal expansion coefficient to that of aluminum, so as to ensure that the structure will not be affected by temperature changes.
　　Due to the imported corner crimping glue and the advanced processing of compounding and pressing, the 45-degree corner crimping produces flat and smooth surface with high strength and good performance of sealing. Sealing strips made of trimer ethylene-propylene are inserted into the grooves in the corresponding cavity to guarantee a better sealing performance and easy replacement.