noun
adhesion; adhesive force
Technical term used in physics, engineering, and materials science to describe the force that holds different substances together at their interface.
この接着剤は金属に対する凝着力が非常に高い。
This adhesive has very high adhesion to metal.
塗装の耐久性は下地との凝着力に大きく依存する。
The durability of the coating depends greatly on its adhesion to the substrate.
凝集力 refers to cohesive force (within the same substance), whereas 凝着力 is adhesive force (between different substances).
Compound of 凝着 (gyōchaku, 'adhesion') + 力 (ryoku, 'force'). The term is a modern technical coinage based on Chinese-derived morphemes.