Polyurethane vs Rubber: Which Material to Choose

In the world of industrial wheels, polyurethane and rubber (natural or synthetic) are the two most widely used soft tread materials. Both offer vibration damping and floor protection, but their differences are significant and can greatly affect the performance, service life, and operating cost of your facility. Let us examine each in depth.

Characteristics of Polyurethane Wheels

Polyurethane (PU) is a synthetic polymer that combines the properties of plastic and rubber. It is produced across a wide range of hardness values (Shore A), allowing precise tuning to the demands of each application.

Advantages of polyurethane:

• Very high wear resistance: Polyurethane degrades far more slowly than rubber in high-frequency applications.
• Low rolling resistance: Rolls more easily, reducing operator fatigue and energy consumption in powered vehicles.
• Outstanding floor protection: Does not leave black marks on floors — ideal for varnished or epoxy-coated surfaces.
• Resistance to oils and greases: Suitable for environments with lubricant spills or oil processing.
• Good chemical resistance: Resistant to many solvents and mildly concentrated acids.
• Low rolling noise: Quiet operation, ideal for office environments or hospitals.

Disadvantages of polyurethane:

• Less elastic on very uneven floors (lower vibration absorption compared to soft rubber)
• Low resistance to very high temperatures (generally up to ~80°C)
• Becomes hard and brittle in very cold environments (below -20°C)
• Higher purchase cost compared to rubber

Characteristics of Rubber Wheels

Rubber (natural or synthetic) is the classic material for wheels that require good vibration damping and traction.

Advantages of rubber:

• Outstanding vibration absorption: Effectively absorbs shocks, protecting transported goods.
• Good grip on uneven surfaces: Adapts better to grooves, thresholds, and surface irregularities.
• Resistance to extreme temperatures: Wide operating range, from -40°C to +120°C depending on compound type.
• Low cost: Generally less expensive than polyurethane.
• Good outdoor durability: Withstands UV radiation better than some PU types.

Disadvantages of rubber:

• Frequently leaves black marks on floors, especially light-coloured surfaces
• Higher rolling resistance compared to PU
• Lower resistance to oils, lubricants, and many chemicals
• Faster wear in high-intensity applications

Property Comparison: Polyurethane vs Rubber

| Property | Polyurethane | Rubber | |---|---|---| | Wear resistance | Very high | Moderate | | Rolling resistance | Low | High | | Vibration absorption | Moderate | Very high | | Floor protection | Outstanding | Good (but may mark) | | Oil resistance | Good | Low | | Chemical resistance | Good | Moderate | | Rolling noise | Very low | Low | | Temperature range | -20°C to +80°C | -40°C to +120°C | | Cost | High | Low | | Load capacity | High | Moderate |

Which Applications Call for Polyurethane

Choose polyurethane when:

• Food, pharmaceutical, or electronics industries: Clean environments that cannot tolerate floor marking.
• Warehouses with heavy loads: Low rolling resistance and high wear resistance reduce total operating cost.
• Powered vehicles (AGVs, pallet trucks): Energy efficiency is critical.
• Long transport runs: Low friction saves operator fatigue and energy.
• Varnished or epoxy-coated floors: Surface protection is essential.

Which Applications Call for Rubber

Choose rubber when:

• Uneven or damaged floors: Elasticity absorbs surface irregularities more effectively.
• Transporting sensitive goods: Vibration reduction is the primary requirement.
• Outdoor applications: Resistant to extreme temperatures and UV exposure.
• Steps, thresholds, ramps: Superior grip is critical for safety.
• Budget-sensitive applications: When cost is the primary decision factor.

Tip: For warehouses with epoxy flooring and heavy loads, polyurethane typically delivers better results. For outdoor storage areas or environments with uneven surfaces, rubber is often the safer choice.

Conclusion

Both polyurethane and rubber have their rightful place in the world of industrial wheels. The correct choice depends on your specific operating conditions: floor type, load requirements, cleanliness standards, temperature range, and budget.

Explore our full range of polyurethane and rubber wheels in our catalog. If you are unsure which material suits your application, contact us for personalised technical advice.