In recent years, the price of domestic PVC raw materials has risen sharply, which has led to an increase in the price of some building materials. However, due to the oversupply of plastic doors and windows in the market, the prices of plastic profiled materials and doors and windows have fallen all the way, and some manufacturers are in a state of loss. The only effective way out for plastic door and window enterprises is to replace the original low-efficiency and toxic formula additives through the development and application of new effective, low-lead, harmless, and anti-bacterial formula additives, to improve product performance and file quality, and to form different Featured products, so as to widen the distance in price, to meet the needs of different climate fields, different grades of buildings and consumer groups.
In severe cold and cold regions, the impact modifier should be appropriately increased or the new impact modifier ACR should be used to replace the original impact modifier CPE to improve the impact resistance of plastic profiles.
In areas with hot and high ultraviolet radiation intensity, the dose of titanium dioxide and ultraviolet absorber should be increased appropriately to improve the anti-aging performance of plastic profiles.
In high-rise buildings in coastal areas, profiled materials with A and B wall thickness (2.8mm or 2.5mm) and larger cavity should be used to improve the wind pressure resistance of plastic doors and windows.
Use lead-free or low-lead formulations such as calcium zinc rare earth or organic tin stabilizers to replace lead salt formulations to meet and enhance the environmental awareness of some consumer groups. At present, strictly restricting the lead content in products has become a basic national policy of many developed countries. CHINA still has a considerable gap in this regard, and efforts should be made to improve. The development and production of activated fine light calcium carbonate and nano-scale calcium carbonate provide a certain space for reducing the cost of raw materials on the premise of ensuring the physical and chemical properties of plastic profiles.
In recent years, two breakthroughs have been made in the application research of calcium carbonate: one is to use fatty acids and various coupling agents to treat the surface of calcium carbonate to improve its surface activity and affinity with PVC molecules; Calcium particles are refined to increase their compatibility and dispersion with PVC molecules.
