Extending the Service Life of Polyurethane Pads
Polyurethane pads are widely used in jacks and lifting equipment due to their excellent load-bearing capacity, resilience, and wear resistance. Proper care and usage can significantly extend their service life and maintain operational safety.
1. Material Selection
Choose the Right Grade: Use polyurethane pads formulated for specific load requirements, environmental conditions, and exposure to chemicals.
Oil-Resistant Options: For environments with potential hydrocarbon exposure, select oil-resistant polyurethane to prevent swelling and degradation.
Temperature-Resistant Grades: In extreme hot or cold conditions, choose pads designed to retain elasticity and strength under temperature variations.
2. Proper Usage
Adhere to Load Ratings: Avoid exceeding the manufacturer’s specified load capacity to prevent permanent deformation.
Even Load Distribution: Position the load centrally to avoid uneven stress and tilting.
Avoid Impact Loading: Apply loads gradually rather than sudden impacts, which can accelerate fatigue.
Surface Compatibility: Ensure the contact surfaces are clean, flat, and free from sharp objects that may damage the pad.
3. Maintenance Practices
Regular Inspection: Check for cracks, swelling, delamination, or surface wear. Replace pads showing signs of deterioration.
Cleaning: Remove dust, debris, and contaminants such as oil or chemicals that may degrade the material.
Environmental Protection: Store pads away from direct sunlight, extreme temperatures, and chemical exposure.
Lubrication and Coating: Where appropriate, use protective coatings to reduce friction and wear.
4. Storage Guidelines
Controlled Environment: Store pads in a dry, ventilated area with moderate temperatures.
Avoid Compression: Do not stack heavy objects on stored pads to prevent permanent deformation.
Rotate Pads: For frequently used pads, rotate their position to ensure even wear.
5. Conclusion
Extending the service life of polyurethane pads requires careful material selection, proper load handling, routine maintenance, and suitable storage. Implementing these measures reduces premature failure, ensures stability during lifting operations, and enhances overall safety.
References
Gent, A. N. Engineering with Rubber: How to Design Rubber Components. Hanser Publishers, 2012.
Lake, G. J. “Fatigue and Fracture of Elastomers.” Rubber Chemistry and Technology, 2000.
ASTM D2240 – Standard Test Method for Rubber Property—Durometer Hardness.
ISO 2230 – Rubber Products—Guidelines for Storage and Maintenance.
ASTM D2000 – Standard Classification System for Rubber Products in Automotive and Industrial Applications.
