Under the influence of various factors, the pvc hard board industry has developed rapidly in recent years. Pvc materials have many advantages, such as low density, which is convenient for soldering and processing. At the same time, it has excellent chemical resistance, heat resistance and impact resistance, is safe and non-toxic, and does not produce odor. It is currently an environmentally friendly engineering material. The pvc hard board is mainly white, but other colors can be customized according to customer requirements. Its applications are divided into a wide range of applications: it can be used to manufacture acid and alkali resistant equipment, wastewater treatment equipment and exhaust equipment. It has also been widely used in industrial environments such as clean rooms and semiconductor factories.
Since the pvc hard plate is extruded from the machine head, after the extrusion, the material is in contact with the center roll of the three-roll calender for the first time, so the temperature of the center roll is higher than the temperature of the upper roll, and generally increases by 15 to 20. °C. Under such conditions, the molten pvc raw material is in contact with the calender rolls. At the same time, the cooling rates of the upper and lower surfaces are close, which allows them to be extruded into relatively transparent sheets. Otherwise, the sheet will appear as a white crystal due to the different crystallization rates. Once the temperature difference of the calender rolls is too large, the difference in crystallization speed is too large to cause the formation of white crystals, which affects the quality of the finished product.
At present, due to the development of the market to a certain extent, the pvc hard board market has also encountered many new situations. For example, the homogenization of plates is more serious, the shortage of funds, and the company's ability to innovate is low, and there are obvious follow-up behaviors. The pvc hard board industry is encountering some unprecedented challenges.