The performance differences between HDPE (high-density polyethylene) and ultra-high molecular weight polyethylene (UHMWPE) are significant, and the selection should be based on specific application scenarios. The following is a comparison of key features and an analysis of applicable scenarios:
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Product drawing
Basic feature
| Characteristics | HDPE | UHMWPE | The dominant party |
| Molecular weight | 1.5 million - 2 million | 2.5 million - over 7 million | UHMWPE |
| Wear resistance | Medium (about 1/10 of UHMWPE) | The top plastic, six times that of carbon steel and ten times that of HDPE | UHMWPE |
| Impact resistance strength | Good (prone to brittleness at low temperatures) | The plastic maintains toughness at the highest temperature of -196℃ | UHMWPE |
| Temperature resistance range | -60℃ to 90℃ | -269℃ to 80℃ | HDPE (high temperature) UHMWPE (Ultra-low temperature) |
| Coefficient of friction | 0.2-0.3 | 0.05-0.11 | UHMWPE |
| Connection method | Hot melt, flange (with flange heel required) | Direct flanged flange connection, simplifying installation | UHMWPE |
| Cost | Low (widely used in civil engineering) | High (special material) | UHMWPE |
💎 Summary and Suggestions
Choose HDPE: For conventional pipes and low-cost civilian applications, pay attention to temperature resistance and budget.
Choose UHMWPE: In extreme wear, ultra-low temperature and high-impact working conditions, pursue long service life and performance limits.
✅ Priority for UHMWPE scenarios
Anti-adhesion system
Dump truck linings, chemical reaction linings, food machinery (self-lubricating non-stick materials)
High wear condition
Mine conveying liner plates, coal slurry pipelines (with wear resistance 10 times that of HDPE).
Ultra-low temperature environment
Liquid nitrogen equipment components, polar scientific research equipment (not brittle and crack-free at -269℃).
Demand for shock resistance
Mechanical bearings, artificial joints (impact strength >140kg/cm²).
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