Polycarbonate sheet is a kind of thermoplastic engineering plastic sheet with excellent comprehensive performance. Because of its excellent comprehensive performance, it is widely used in many high-tech fields. As consumer demand continues to increase, consumers are increasingly inclined to look for products with higher cost performance. Therefore, the price of polycarbonate solar panels per square meter has become a matter of great concern to everyone.
To understand the price, we must first understand the quality of the plate, and the quality of the plate and the processing technology are inseparable. In particular, the preheating of raw materials as the first link in sheet metal processing is the most important. Therefore, consumers who ask how much per square meter of polycarbonate sheet cost should be extra careful when visiting factories on site.
Preheating the raw materials has two functions: one is to increase the temperature and facilitate molding; the other is to dry and remove moisture. However, different preheating temperatures have a greater impact on particle plasticization and internal gas discharge. If the internal gas is removed during the molding process, the product will have no bubbles and fewer defects, and the resulting product will have a higher density and better mechanical properties.
The density of the polycarbonate board increases first and then decreases with the increase of the preheating temperature, reaching a maximum value at 200°C. After the raw material is put into the mold, the surface particles in contact with the mold are first softened by heat and continue to transfer heat to the inner polycarbonate particles. Under the action of temperature and pressure, the polycarbonate particles are continuously softened and compressed, and the gas is replaced by the polycarbonate particles. The gap between the materials escaped.
Since polycarbonate is a poor conductor of heat, heat transfer is slow, and it takes a long time for the internal particles to reach plastic deformation. Therefore, when the preheating temperature is low, the degree of compression deformation of the polycarbonate particles is low, there are more voids between the particles, and there are many bubbles and low density during molding; when the preheating temperature is too high, the outer polycarbonate in contact with the mold The particles have melted, and the gas inside the polycarbonate is too late to be discharged, so the density is low. When the temperature is 200°C, the outer polycarbonate particles in contact with the mold are plasticized and deformed but are not melted. During the molding process, the gas between the inner particles is easily removed, and the resulting product has the highest density.
