White Black Thick UHMW PE Sheet
Product Performance
Mechanical Properties
Ultra-High Wear Resistance: Akron abrasion value ≤ 0.03 cm³/1.61 km (compared to approximately 0.1-0.3 cm³/1.61 km for standard HDPE), which is 1/7 that of steel and 1/25 that of brass. In high-friction environments (such as conveyor belt rollers and mining machinery liners), its service life can reach 5-10 times that of standard plastics.
High Impact Resistance: Notched impact strength of simply supported beam ≥ 150 kJ/m² (compared to approximately 20-50 kJ/m² for standard HDPE), maintaining an impact strength of > 100 kJ/m² at -40°C without brittle cracking (suitable for use in cold regions).
Medium Rigidity: Flexural strength 25-40 MPa, elastic modulus 700-900 MPa (lower than metal but higher than standard plastics), capable of withstanding moderate bending loads (such as in lightweight equipment support structures).
Thermal Properties
Moderate heat resistance: Heat deflection temperature (under 1.82 MPa load) 80-100°C, short-term resistance to temperatures up to 120°C (such as in hot water or steam environments), long-term operating temperature range -70°C to 90°C (excellent low-temperature toughness).
Low thermal expansion coefficient: approximately 10-12×10⁻⁵/°C (slightly higher than ordinary HDPE), providing good dimensional stability in temperature-fluctuating environments (such as precision instrument components).
Chemical Properties
Excellent chemical resistance: Stable to most acids (such as sulfuric acid and hydrochloric acid), alkalis (such as sodium hydroxide), saline solutions, and organic solvents (such as ethanol and acetone) (no significant swelling at concentrations below 95%). The only insurmountable resistance is concentrated nitric acid, concentrated sulfuric acid, and halogenated hydrocarbons (such as carbon tetrachloride), making it suitable for the manufacture of chemical storage tanks and laboratory equipment.
Non-toxicity: Complies with FDA and USDA food contact safety standards and can be used in direct food contact (such as in food conveyor belts and storage silos) without emitting any odor.
Electrical Properties
Excellent Insulation: Volume resistivity ≥ 10⁶Ω·cm, dielectric strength 25-35kV/mm, dielectric constant 2.3-2.5 (1kHz), suitable for low-voltage electrical insulation components (such as switch housings and junction boxes).
Antistatic Properties (Optional): After adding an antistatic agent (such as carbon black or a surfactant), the surface resistivity reaches 10⁶-10⁹Ω (common UPE is approximately 10⁴Ω), preventing static electricity accumulation (suitable for electronics factory floors or dusty environments).
Processability
Easy to Process: Can be formed by extrusion (sheet thickness tolerance ±0.2mm), hot pressing (complex shaped components), or machining (turning, milling), making it suitable for customized production (such as special-shaped wear-resistant linings). Welding Compatibility: Compatible with hot air welding (welding temperature 210-230°C), ultrasonic welding, and solvent bonding (such as dichloromethane). Weld joint strength can reach 80%-90% of the parent material (under normal operation).
Other Features
Self-lubricating: The friction coefficient is 0.07-0.15 (compared to approximately 0.2-0.3 for standard HDPE), enabling low-friction operation without lubricant (e.g., conveyor belt guides, machine tool slides).
Sound Absorption and Vibration Damping: With a loss factor tanδ > 0.2 (higher than standard HDPE), it effectively absorbs vibration energy (reducing noise by 10-15 dB) and impact energy (e.g., shock-absorbing bases for industrial equipment).
Precautions
Processing Temperature Control: Extrusion temperatures must be strictly controlled between 180-220°C (higher temperatures may cause molecular chain degradation, resulting in bubbles or discoloration; lower temperatures may result in slower extrusion speeds and a rough surface). The recommended mold temperature is 80-100°C to reduce internal stress.
Long-term UV Exposure: UPE sheets without UV inhibitors are susceptible to aging (becoming brittle and discoloring) when exposed outdoors. Weather-resistant grades (with the addition of carbon black or hindered amine light stabilizers) are resistant to UV radiation and can withstand 8-10 years of outdoor use without noticeable aging. The design should be tailored to the intended use environment (for example, weather-resistant grades are essential for outdoor installations).
Chemical Compatibility: Avoid contact with concentrated nitric acid, concentrated sulfuric acid, and halogenated hydrocarbons (such as carbon tetrachloride). These strongly oxidizing solvents may cause rapid swelling or cracking of the UPE sheet. Therefore, alternative materials with high corrosion resistance, such as PTFE or PVDF, should be used. Hygroscopicity
Management: Water absorption rate is less than 0.02% (much lower than ordinary plastics), and no drying treatment is required before processing (but if exposed to a humid environment for a long time, it is recommended to preheat to 60-80℃ to eliminate internal stress).
