Hot melt Adhesives are one part, solvent and water free formulations that are thermoplastic, 100% solid, and are all adhesive at room temperature. However, at elevated temperatures, the usual operating temperature being in the range of 150 to 200° C, they become a low viscosity fluid with excellent adhesive properties. Subsequent to the removal of heat, they set by simple cooling.  They achieve a solid state and resultant strength by cooling, as contrasted with other adhesives, which achieve the same results through evaporation or removal of the solvents.