How to choose polyurethane casters suitable for specific high-temperature scenarios?

To select polyurethane casters suitable for specific high-temperature scenarios, consider three key criteria: temperature adaptability, scenario compatibility, and performance compatibility. This approach should be carefully considered based on actual operating conditions. The following steps should be taken:

1. Accurately Assess the Scenarios Temperature and Identify the High-Temperature Resistance Threshold
First, determine the actual temperature range (continuous high temperature/intermittent high temperature) and the temperature fluctuation range for the scenario:

For continuously high-temperature scenarios (e.g., 90-130°C in a food baking workshop), select casters with a high-temperature resistance threshold 20-30°C higher than the actual temperature (e.g., 150°C rating) to avoid material fatigue caused by prolonged high temperatures.

For intermittent high-temperature scenarios (e.g., short-term operation at 120-150°C in a laboratory), select casters with a threshold that matches the maximum temperature. However, ensure the caster's "short-term high-temperature resistance" (e.g., 4-6 hours of continuous use at 150°C).

Also, consider the floor temperature. For example, in outdoor high-temperature scenarios, the floor may be 10-15°C higher than the ambient temperature due to sunlight exposure, so the floor temperature should be factored into the assessment.

2. Select supporting structures and materials based on application characteristics.
Different high-temperature applications have different additional requirements (such as load-bearing capacity, corrosion resistance, and hygiene standards), requiring specific matching:

Load-bearing capacity and floor environment: Industrial production lines (such as automotive paint shops) require heavy loads (200-500kg per wheel). A "high-temperature polyurethane tread + steel/aluminum alloy wheel" combination should be selected. The wheels must be resistant to high-temperature deformation. If the floor is oily, the tread's oil resistance should be verified (e.g., modified polyurethane with oil-resistant additives).

Hygiene and corrosion requirements: For high-temperature food/pharmaceutical applications (such as baking tray transfer), a smooth, odorless, food-grade, high-temperature polyurethane wheel should be selected. Rust-resistant wheels (304 stainless steel is an option) should be used to prevent the growth of impurities and the contamination of the material by metal corrosion.

Movement Frequency and Vibration Damping Requirements: When transporting precision equipment in the laboratory, in addition to high-temperature resistance, the vibration-damping properties of polyurethane must be retained. Choose a model with a moderate tread hardness (Shore A 85-90 degrees) to avoid vibrations that interfere with test equipment caused by excessive hardness.

3. Verify Technical Parameters to Eliminate Compatibility Risks
Finally, review the technical data sheet provided by the caster manufacturer, focusing on confirming three key indicators:

High-Temperature Resistance Limit: Clearly indicate "continuous high-temperature resistance" and "short-term high-temperature resistance" to avoid simply stating "high-temperature resistance" without a specific value.

Performance Retention at High Temperature: For example, the change in load capacity at 120°C (should be ≥ 80% of the load at room temperature) and the increase in rolling resistance (should be ≤ 30% of the load at room temperature) to prevent a sudden drop in performance at high temperatures.

Certifications and Test Reports: Prefer products that have passed third-party testing (such as SGS high-temperature aging testing) to ensure the authenticity of the parameters. Material safety certification (such as FDA certification) is particularly important for applications with stringent compliance requirements, such as those for food and pharmaceuticals.