The production process pattern of PVC Paste Resin in China mainly includes two preparation processes. The first is the calcium carbide method, which mainly produces raw materials such as calcium carbide, coal, and raw salt; The second is the ethylene method, with petroleum as the main raw material. The production of PVC in the international market is mainly based on the ethylene method, while in China, due to the limitations of abundant coal, poor oil, and limited gas resources, the main method is the calcium carbide method, which accounts for more than 70% of China's total PVC production capacity. After years of development, China's integrated circular economy industry chain of "calcium carbide chlor alkali" has reached a certain scale. Especially for chlor alkali enterprises in the northwest, the vast majority of them are equipped with calcium carbide furnaces. In the PVC paste Resin industry, enterprises in the northwest region basically have the ability to produce powder materials simultaneously, and the matching rate of calcium carbide furnaces is relatively high. All the calcium carbide required by PVC paste resin enterprises in North China and Northeast China are outsourced, while the ethylene process route is mainly used in East China.
Calcium carbide is an upstream raw material for PVC paste resin, but it can be clearly seen from the trend chart that the prices of PVC paste resin and calcium carbide show a less obvious negative correlation trend. This means that when the price of raw material calcium carbide rises, the market price of PVC paste resin decreases, mainly due to time constraints. As a marginal quantity, PVC paste resin has weak bargaining power for calcium carbide, and high demand for PVC paste resin will gradually boost the price of calcium carbide, The speed of change is faster than the price of calcium carbide. In the first half of 2023, the price of PVC paste resin gradually declined, while the price of calcium carbide fluctuated slightly. In the second half of the year, the price of PVC paste resin fluctuated, while the price of calcium carbide slightly increased.
The lowest point of calcium carbide prices for the whole year was in mid July, with the lowest price around 3140 yuan/ton. The highest point of prices for the whole year was at the end of January, with prices around 4140 yuan/ton. The lowest price of PVC paste resin for the whole year was in mid June, with the lowest price around 7500 yuan/ton. The highest price for the whole year was at the end of September, with a price of around 9000 yuan/ton.
The production capacity distribution of PVC paste resin is mainly based on the calcium carbide method, which can stand at around 66%. The main advantages of supporting paste resin enterprises can be classified into two aspects. On the one hand, it is the cost advantage of the enterprise, as the supporting carbide equipment of the enterprise is mostly advanced large enclosed furnaces, and the electricity resources used are mostly from self owned power plants. Therefore, the relative cost advantage brought by the large scale and low cost is obvious; On the other hand, in terms of production stability of the enterprise, the group production method requires the operation and maintenance of the calcium carbide device to correspond with the supporting PVC paste resin device, which undoubtedly makes the enterprise more efficient and the production plan more reasonable.
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