Characteristics of Polypropylene Packing
Briefly introduce the performance characteristics of polypropylene fillers.
Characteristics of Polypropylene Packing
Polypropylene (PP) is the most widely used material among plastic fillers. With its three major advantages—corrosion resistance, low cost, and lightweight—it dominates the fields of chemical engineering, environmental protection, and water treatment.
Core Performance
Performance | Characteristics |
Density | 0.90-0.92 g/cm³ (approximately 1/8 the density of stainless steel) |
Temperature Resistance | ≤80℃ long-term, ≤100℃ short-term |
Corrosion Resistance | Resistant to hydrochloric acid, dilute sulfuric acid, alkalis, and organic solvents; not resistant to concentrated nitric acid and concentrated sulfuric acid |
Wettability | Hydrophobic (contact angle approximately 90°), low efficiency with low liquid volume |
Cost | Lowest among plastic fillers |
Main Applications
Hydrochloric acid absorption and distillation (hydrochloric acid resistant, standard choice)
Organic solvent recovery (resistant to alcohols, ketones, esters, no metal contamination)
Wet desulfurization (chloride ion resistant, impact resistant)
Cooling towers (lightweight, high porosity)
Acid mist purification, water treatment degassing
Usage limitations
Low temperature resistance: softening and deformation at >100℃
Poor wettability: lower efficiency than ceramic in low liquid volume conditions
Not resistant to strong oxidizing acids: requires PVDF or ceramic as a substitute
Static buildup: explosion-proof required when handling flammable media
Comparison with other materials
Comparison | PP | Metal | Ceramic |
Temperature Resistance | <100℃ | <600℃ | >800℃ |
Hydrochloric Acid Resistance | Excellent | Poor | Excellent |
Alkali Resistance | Excellent | Depends on Material | Not Resistant |
Cost | Lowest | High | Medium |
Selection Recommendations
Operating Conditions | Should PP be used |
Temperature <80℃, hydrochloric acid/organic solvents | Preferred |
Strong oxidizing acids, high temperature >100℃ | Not suitable |
Low liquid volume (<5 m³/m²•h) | Caution (low efficiency) |
Summary
The performance characteristics of polypropylene (PP) fillers can be summarized as follows: broad corrosion resistance, low density, low cost, low temperature resistance, and poor wettability. In corrosive media such as hydrochloric acid and organic solvents at temperatures below 80℃, PP is the most cost-effective choice. For high-temperature, strongly oxidizing acid, or low-volume applications, other materials must be used. We are a Chinese supplier of plastic fillers. For more information, please contact us via email at annayu@169chem.net or WhatsApp at +8618909016373.