PVC is widely used in industries such as pvc coated tarpaulin,pvc coated fabric, vinyl roll, electronics, chemicals, automobiles, and machinery due to its advantages of durability, plasticity, electrical insulation, and corrosion resistance. In recent years, the global PVC industry has developed rapidly.
PVC is a polymer formed by the polymerization of vinyl chloride monomer (VCM) with initiators such as peroxides and azo compounds, or under the action of light and heat, according to the mechanism of free radical polymerization.
There are two main preparation processes for PVC production. One is the ethylene method, with the main raw materials being petroleum and chlorine gas; The second is the calcium carbide method, which mainly produces coal and raw salt as raw materials. The development trend of the PVC industry points out that the production of PVC in the international market is mainly based on the ethylene method, while in China, due to the resource endowment limitations of rich coal, poor oil, and low gas, the main method is the calcium carbide method.
The PVC industry in China began in the late 1950s. Experimental research began in 1953 at the Chemical Comprehensive Testing Institute of the former Ministry of Heavy Industry's Chemical Bureau (predecessor of the Ministry of Chemical Industry and Shenyang Chemical Research Institute). In 1977, China introduced PVC production technology from abroad for the first time (the 80000 ton/year acetylene oxychlorination to vinyl chloride plant put into operation at Beijing Chemical Plant 2).
From the 1980s to the early 21st century, the domestic PVC industry developed rapidly. Until the 13th Five Year Plan period, the country began to promote high-quality development. The PVC industry may experience the following trends in its future development:
Trend 1: Environmental Protection and Sustainable Development
As China's attention to environmental pollution and sustainable development increases, the PVC industry will face higher environmental requirements. Enterprises need to reduce energy consumption and emissions in the production process through technological innovation and process improvement, develop more environmentally friendly products, and provide recycling and reuse solutions.
Post time: 2023-07-31