Hold Power
Definition
Ability to maintain bonded state under sustained load, reflecting lasting endurance.
Historical Background
1980s: constant-temperature/constant-load instruments standardized evaluation.
Example
Wall hook holding 24 hours = good holding power. Like a marathon runner: endurance, not explosive strength.
Formula
Holding Power = Load (N) / Bonding Area (mm2) x Time (h)
Core Concepts
Creep resistance: molecules resisting flow under sustained force, depending on crosslinking and cohesive strength.
Extended Applications
Pipeline: >10,000 hours; automotive structural: 30-year vibration; electronic: -40C to 150C cycling; curtain wall: 15-year wind.