The difference between carbide method and ethylene method
The two methods of PVC production are calcium carbide method and ethylene method. What is the difference between them?
1. Different cost determining factors
The cost of PVC produced by calcium carbide method depends on the electricity price, and the higher the electricity cost, the higher the production cost.
The cost of PVC produced by ethylene method is directly linked to international crude oil prices, and fluctuations in oil prices will directly affect its price.
2. Significant differences in quality
PVC produced by the calcium carbide method has a moisture content 4-5 times higher than that produced by the ethylene method, and there are also 3 times more impurities,
This means that PVC produced by ethylene method has higher purity and more stable product quality.
Especially for high-end products, ethylene method is a better choice
3. Molecular weight distribution affects performance
The molecular weight distribution of PVC produced by calcium carbide method is wider
Resulting in higher thermal stability, mechanical properties, and weather resistance compared to ethylene method.
Vinyl PVC is more resistant to high temperature and aging, suitable for outdoor construction or harsh environment.
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