Hot melt adhesive is thermoplastic adhesive, which
means it stays solid under room temperatures but
turns into liquid when it reaches its pre-determined
melting temperatures.
It also differs from conventional liquid-based
adhesive such that it condenses by cooling rather
than by adhesion or evaporation of the liquid vehicle,
which is usually water or solvent.
This "cooling effect" HMA a preferred
choice of adhesive among many industrial users
What is adhesive?