Natural Color Thermoplastic Polyurethane PU Sheets PU Board
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Natural Color Thermoplastic Polyurethane PU Sheets PU Board
Analysis of PU Polyether Sheet's Key Performance Characteristics
Superior Wear Resistance - One of Its Core Advantages in Industrial Applications
Mechanism: PU material inherently possesses a high coefficient of friction and surface viscoelasticity. Its hard segments form rigid microdomains that resist the cutting and plowing effects of abrasive particles. Its soft segments provide energy absorption and rebound, reducing wear and tear. Its excellent "elastic memory" property makes it less susceptible to crack propagation after impact or friction.
Comparative Data:
Under identical test conditions, PU's wear resistance is typically 3-5 times that of natural rubber and several times greater than that of common plastics (such as nylon and PVC).
Applications: Rubber lagging for mining conveyor belts, excavator track liners, and heavy-duty roller lagging.
High Elasticity and Low Hysteresis Loss – Excellent Dynamic Performance
Polyurethane sheet exhibits extremely low energy loss (i.e., low hysteresis and low heat generation) under dynamic loads. This means that heat accumulation is less likely to occur during repeated compression, bending, and friction, reducing material fatigue and aging. It also quickly recovers to its original shape, making it suitable for applications such as cushioning, shock absorption, sealing, and dynamic contact.
Reason:
The high elasticity of the soft segments combined with their microphase separation structure enable PU to undergo reversible deformation under load.
The appropriate hard segment content ensures resilience without excessively sacrificing flexibility.
Mechanical Strength and Load-Bearing Capacity – "The Elasticity of Rubber + the Strength of Plastic"
PU Sheet's tensile strength, tear strength, and shear resistance are significantly superior to those of ordinary rubber, while offering superior impact resistance and flexibility compared to thermoplastics.
Typical Values:
Tensile Strength: 20-60 MPa (depending on hardness and formulation);
Elongation at Break: 200%-600%;
Tear Strength: 50-100 kN/m. This allows PU sheets to serve not only as structural components, load-bearing pads, and protective layers, but also as functional components for flexible connections, collision avoidance, and sealing.
Oil, Solvent, and Chemical Resistance
PU has excellent resistance to most mineral oils, lubricating oils, hydraulic oils, fuel oils, and some organic solvents, surpassing natural rubber and most general-purpose plastics.
Note:
It has poor resistance to highly corrosive media such as strong acids, strong bases, ketones (such as acetone and MEK), and aromatic hydrocarbons (such as toluene).
Chemical resistance can be improved through the introduction of specialty polyethers, cross-linking modifications, and surface coatings.
Temperature Adaptability - Soft PU is resistant to low temperatures, while hard PU is resistant to medium and high temperatures.
The operating temperature range of conventional PU sheets is generally -40°C to +80°C.
It remains soft and resistant to cracking at low temperatures (especially suitable for cold regions or refrigeration equipment).
It is prone to softening, oxidation, and yellowing at high temperatures, making standard PU sheets unsuitable for extended periods exceeding 80°C.
Specially formulated PU (such as high-temperature resistant PU):
The operating temperature can be increased to 100-120°C, and can even withstand short-term temperatures of 150°C.
This is achieved by incorporating aromatic isocyanates, cross-linking modifications, and heat-resistant fillers.
Summary: Why Choose PU Sheet?
PU Sheet is more than just an "industrial sheet"; it's the product of a deep integration of materials science, engineering technology, and application needs. Based on a designable polymer structure, through precise formulation and process control, it achieves a multi-faceted balance of elasticity and strength, wear resistance and durability, and functionality and cost. In many demanding applications requiring both, it provides a cost-effective, adaptable, and reliable material solution.
Whether used as a wear-resistant liner, cushioning gasket, industrial protection, or customized functional components, PU Sheet demonstrates its irreplaceable material value. In the future, with continuous breakthroughs in materials technology, the application boundaries of PU Sheet will continue to expand, and its performance will be even more outstanding.
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