| Plastic type |
key performance |
Typical industrial applications |
| POM |
High rigidity, wear-resistant, self-lubricating |
Gears, bearings, camshafts, valve components |
| PA |
Good toughness, fatigue resistance, oil resistance |
Pulley, chain guide, conveyor belt components |
| PTFE |
High temperature resistance (260 ºC), chemical inertness, extremely low friction |
Sealing rings, liners, chemical pipeline liners |
| UHMWPE |
Impact resistant and wear-resistant (better than steel) |
Material bin liner, conveyor chute, artificial joint |
| PC |
High transparency and impact resistance |
Windows, protective covers, instrument casings |
| PEEK |
High temperature resistance (250 ºC), high strength |
Aerospace components, high-temperature pump valve parts |
| ABS |
Easy to process, smooth surface |
Control panel, casing, ventilation duct |
Introduction to the Properties and Applications of UHMWPE (Ultra High Molecular Weight Polyethylene)
1, Basic characteristics
UHMWPE (Ultra High Molecular Weight Polyethylene) is a linear polyethylene with a molecular weight typically between 1 million and 6 million, much higher than ordinary polyethylene (HDPE/LDPE). Its unique molecular structure endows it with excellent comprehensive performance.
2, Core performance
wear resistance
The wear resistance ranks first among plastics, 7 times that of carbon steel and 4 times that of nylon, making it suitable for high friction environments.
impact resistance
The impact strength is twice as high as polycarbonate, and it maintains toughness even at low temperatures (-40 ºC).
self-lubrication
Low friction coefficient (0.07-0.11), close to PTFE, no additional lubricant required.
chemical stability
Acid and alkali resistant, organic solvents (except strong oxidizing acids), can resist most corrosive media below 80 ºC.
low-density
The density is only 0.93-0.94 g/cm ³, which is lighter than water and easy to process and transport.
other characteristics
Non toxic, odorless, in compliance with food/medical grade standards; Low water absorption; Good electrical insulation.
Shortcomings: Poor high temperature resistance (melting point 136 ºC, long-term use temperature ≤ 80 ºC), low hardness, and difficult processing (requiring sintering or compression molding).
3, Main purpose
1. Industrial sector
Wear resistant components: conveyor guide rails, gears, bearing bushings, pump valve parts.
Material handling: coal bunker liner, mining sieve plate, powder conveying pipeline (anti adhesion).
2. Medical field
Artificial joints: acetabular and knee joint pads (with good biocompatibility).
Surgical suture: high-strength absorbable suture.
3. Security Protection
Bulletproof materials: made into bulletproof vests and helmets (lighter than aramid and stronger in energy absorption).
Armor protection: Vehicle armor interlayer (resistant to fragmentation impact).
4. Sports equipment
Ice and snow sports: snowboard bottom (low friction), ice hockey field fence.
Marine engineering: fishing nets, ship cables (resistant to seawater corrosion, high strength).
5. Other applications
Food machinery: cutting board, conveyor belt (compliant with FDA standards).
Electronics industry: insulation components, lithium battery separators (electrolyte resistant).
4, Common product forms in the market
Plate/bar: mechanical wear-resistant lining.
Fiber: High strength ropes and bulletproof fabrics.
Film: Packaging or membrane material.
UHMWPE (Ultra-High Molecular Weight Polyethylene) is a linear polyethylene known for its extraordinary molecular weight, typically ranging from 2 million to 6 million, far exceeding that of ordinary HDPE. This material is celebrated for its unmatched wear resistance, remarkable impact resistance, and innate self-lubricating qualities, making it a favorite in industrial, medical, and sports equipment applications.
Notable Performance Features of UHMWPE:
Ultimate Wear Resistance: UHMWPE is the pinnacle of wear-resistant plastics, offering a performance that is seven times more robust than carbon steel and four times tougher than nylon.
Extreme Impact Resistance: Even in frigid temperatures as low as -200°C, UHMWPE maintains its exceptional toughness and impact resistance, ensuring reliable performance across diverse conditions.
Low Friction and Self-Lubrication: With a friction coefficient as low as 0.1 to 0.2, akin to PTFE, UHMWPE excels in oil-free lubrication settings, promoting efficiency and ease of movement.
Chemical Stability: UHMWPE withstands acids, alkalis, and organic solvents, excluding strong oxidizing acids, making it versatile for chemical-rich environments.
Lightweight Advantage: With a low density of 0.93 to 0.94 g/cm³, UHMWPE is even lighter than water, lending itself to applications where weight reduction is critical.
Temperature Range Endurance: Capable of withstanding temperatures from -200°C to +80°C, and up to 100°C for some modified models, UHMWPE boasts impressive thermal resilience.
Excellent Dielectric Properties: UHMWPE provides stellar electrical insulation, making it a valuable material for applications requiring high dielectric strength.
Biocompatibility: Meeting medical grade standards (ISO 10993), UHMWPE is suitable for human implant applications, ensuring compatibility and safety.
UV Resistance: To enhance its outdoor weather resistance, UHMWPE can be fortified with stabilizers, making it more durable when exposed to ultraviolet rays.
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