Improved Temperature Resistance and Applications of CPVC Fillers
Briefly introduces the improvement of temperature resistance and applications of CPVC fillers.
Improved Temperature Resistance and Applications of CPVC Fillers
Chlorinated polyvinyl chloride (CPVC) is a chlorinated modified product of PVC. By increasing the chlorine content, its temperature resistance is significantly improved, filling the gap in medium-temperature corrosion conditions between PP and PVDF.
Performance Comparison with PVC
Comparison Items | PVC | CPVC | Improved |
Long-term temperature resistance | 60℃ | 90-100℃ | +30-40℃ |
Short-term temperature resistance | 70℃ | 110℃ | +40℃ |
Chlorine content | 57% | 63%-69% | +6%-12% |
Corrosion Resistance
CPVC inherits the corrosion resistance of PVC: it is resistant to hydrochloric acid, dilute sulfuric acid, strong alkalis, wet chlorine gas, and hypochlorites; however, it is not resistant to concentrated sulfuric acid, concentrated nitric acid, aromatic hydrocarbons, chlorinated hydrocarbons, ketones, esters, and other organic solvents.
Performance Comparison with PP and PVDF
Material | Upper Temperature Resistance Limit | Cost | Application Position |
PP | 80-100℃ | Low | General Purpose Organic, Acids and Alkalis |
CPVC | 90-100℃ | Medium | Medium Temperature Water Corrosion |
PVDF | 120-150℃ | High | High Temperature Corrosion, Strong Oxidizing Properties |
CPVC fills the gap between PP and PVDF: PP risks softening near 100℃, while PVDF is too expensive.
Typical Applications
Medium-temperature hydrochloric acid absorption (70-90℃)
Wet desulfurization (higher temperature range)
Chlor-alkali industry (wet chlorine treatment)
Medium-temperature dilute sulfuric acid medium
Selection Recommendations
Operating Conditions | Recommendation |
Temperature 60-90℃, water-containing corrosion | CPVC |
Contains organic solvents | CPVC not recommended |
Temperature >100℃, water-containing corrosion | PVDF |
Temperature <80℃, water-containing corrosion | PP |
Summary
The performance of CPVC can be summarized as follows: its temperature resistance is 30-40℃ higher than PVC, reaching 90-100℃, making it suitable for medium-temperature corrosive media containing water; however, it is not resistant to organic solvents. In conditions involving hydrochloric acid, wet chlorine, and dilute sulfuric acid at temperatures of 80-100℃, CPVC offers the best cost-performance ratio. CPVC is not suitable for applications containing organic solvents. We are a Chinese supplier of plastic fillers. For more information, please contact us via email at annayu@169chem.net or WhatsApp at +8618909016373.