Ultra-High Molecular Weight Polyethylene
| Property | Value | Test Method |
|---|---|---|
| Molecular Weight | 3-6 million g/mol | ASTM D4020 |
| Density | 0.93-0.94 g/cm³ | ASTM D792 |
| Tensile Strength | 40-50 MPa | ASTM D638 |
| Melting Point | 130-136°C | ASTM D3418 |
| Impact Strength | No break | ASTM D256 |
Key Features of Ultra-High Molecular Weight Polyethylene:
- Exceptional wear resistance (15 times better than carbon steel)
- Excellent chemical resistance to acids, alkalis and solvents
- Low coefficient of friction (0.10-0.22)
- Outstanding impact strength at low temperatures
- Self-lubricating properties
- FDA and USDA compliant grades available
Ultra-High Molecular Weight Polyethylene Product Variants:
| Grade | Color | Applications |
|---|---|---|
| Standard | Natural White | General industrial wear parts |
| Medical | Blue/White | Surgical implants, medical devices |
| Food Grade | White | Food processing equipment |
| ESD | Black | Electronics manufacturing |
Ultra-High Molecular Weight Polyethylene FAQ
What makes Ultra-High Molecular Weight Polyethylene different from regular polyethylene?
Ultra-High Molecular Weight Polyethylene has much longer polymer chains (3-6 million g/mol vs 0.2-0.5 million for HDPE) giving it superior impact strength, wear resistance and toughness while maintaining chemical resistance.
Can Ultra-High Molecular Weight Polyethylene be machined?
Yes, Ultra-High Molecular Weight Polyethylene can be machined using standard woodworking tools, though special techniques are required due to its low thermal conductivity and tendency to deform under pressure. Carbide-tipped tools with positive rake angles work best.
What is the maximum service temperature for Ultra-High Molecular Weight Polyethylene?
Ultra-High Molecular Weight Polyethylene can typically be used in continuous service up to 80°C (176°F), with short-term exposure up to 100°C (212°F) possible. Above these temperatures, mechanical properties begin to degrade significantly.
Processing Methods for Ultra-High Molecular Weight Polyethylene
- Compression Molding: Most common method for sheets and rods
- Ram Extrusion: Used for continuous length profiles
- Injection Molding: Limited to special low-viscosity compounds
- CNC Machining: Post-processing for precision parts
- Thermoforming: For complex shapes from sheets
Applications of Ultra-High Molecular Weight Polyethylene
| Industry | Typical Applications |
|---|---|
| Material Handling | Chute liners, hopper liners, conveyor components |
| Automotive | Bumper systems, wear strips, suspension components |
| Medical | Artificial joints, orthopedic implants, surgical tools |
| Food Processing | Cutting boards, wear strips, guide rails |
Ultra-High Molecular Weight Polyethylene offers unparalleled performance in high-wear applications where traditional materials fail. Its combination of toughness, lubricity and chemical resistance makes it the material of choice for demanding industrial applications across multiple sectors. When properly specified and processed, Ultra-High Molecular Weight Polyethylene components can outperform metal alternatives while reducing maintenance costs and downtime.