Differences Between Calcium Carbide PVC Resin and Ethylene PVC Resin

Differences in Raw Materials:

Ethylene-based PVC uses ethylene and chlorine, with ethylene costs accounting for about 65% of production costs, heavily influenced by crude oil prices. Calcium carbide-based PVC uses calcium carbide, hydrogen chloride, and electricity, with calcium carbide costs making up about 70% of production costs, mainly depending on electricity prices.

Price Differences:

Due to China's energy structure, calcium carbide PVC dominates the market with 79.76%, while ethylene PVC holds 20.24%. Prices of ethylene PVC are generally higher due to its raw material and process advantages, although its trends are influenced by calcium carbide PVC prices.

Performance Differences:

Calcium carbide PVC resin has a lower molecular weight and a wider molecular weight distribution compared to ethylene PVC resin, impacting heat stability and mechanical strength.

Calcium carbide PVC dry blend has better plasticization performance, showing higher plasticization torque, shorter plasticization time, and lower balance torque.

Application Differences:

Both types of resin are used in similar applications but with different processes. Ethylene PVC is favored for high-end products like automotive interiors, transparent sheets, and films, while calcium carbide PVC is used mainly for pipes and building materials. Generally, ethylene PVC is considered superior in quality.

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