Pad Delamination from Metal Base
Pads used in jacks and lifting equipment rely on a secure bond to the metal base to maintain stability and load distribution. Delamination, where the pad separates from the metal base, compromises performance and safety.
1. Causes of Delamination
Adhesive Failure: Poor-quality adhesives, improper application, or degradation over time can cause the bond to fail.
Surface Contamination: Dirt, oil, rust, or moisture on the metal base or pad reduces adhesion.
Thermal Stress: High or fluctuating temperatures can weaken the adhesive and cause separation.
Overloading or Impact: Excessive load or sudden shocks can exceed the bond’s strength.
Material Incompatibility: Using adhesives that are not suitable for the pad or metal material can lead to premature failure.
2. Effects of Delamination
Reduced Load-Bearing Capacity: Detached pads cannot evenly distribute loads, stressing the jack components.
Instability During Lifting: Separation increases the risk of slipping, tilting, or jack collapse.
Accelerated Wear: Movement of the pad on the metal base causes abrasion, reducing pad lifespan.
Safety Hazards: Sudden pad detachment under load can lead to accidents or equipment damage.
3. Preventive Measures
Proper Adhesive Selection: Use adhesives specifically designed for bonding rubber or polyurethane to metal.
Surface Preparation: Clean and dry both metal and pad surfaces before bonding to ensure optimal adhesion.
Controlled Curing: Follow manufacturer guidelines for adhesive curing time and environmental conditions.
Avoid Overloading: Operate within rated load limits to reduce stress on the bonded interface.
Regular Inspection: Periodically check the bond for signs of separation or weakening; re-bond or replace if necessary.
4. Conclusion
Pad delamination from metal bases is primarily caused by adhesive failure, surface contamination, thermal stress, overloading, and material incompatibility. Ensuring proper bonding techniques, surface preparation, and load management is essential to maintain performance, stability, and safety in lifting operations.
References
Gent, A. N. Engineering with Rubber: How to Design Rubber Components. Hanser Publishers, 2012.
ASTM D429 – Standard Test Methods for Rubber Property—Adhesion to Rigid Substrates.
Lake, G. J. “Fatigue and Fracture of Elastomers.” Rubber Chemistry and Technology, 2000.
ISO 2230 – Rubber Products—Guidelines for Storage and Maintenance.
ASTM D2000 – Standard Classification System for Rubber Products in Automotive and Industrial Applications.
