Full definition
A 100% solid thermoplastic adhesive that is applied in molten state (120-220°C) and forms a bond upon cooling and solidification, typically within seconds — making it the fastest-bonding adhesive technology. No solvents, no mixing, no cure time (except reactive PU hot melts). Types: EVA (ethylene-vinyl acetate — most common, general-purpose packaging and assembly, low cost), polyamide (high heat resistance to 150°C, excellent on metals), polyolefin (good adhesion to plastics, chemical resistance), and reactive PU (applied hot, then moisture-cures over 24-72h for structural cross-linked bond — combines speed of hot melt with strength of PU). Applied by: glue gun (manual, small-scale), applicator head on automated equipment, or roller coater. Open time: 2-60 seconds depending on formulation (hot-applied, limited working time before solidification). Bond strength: 1-10 MPa (non-reactive), up to 20 MPa (reactive PU). Applications: packaging and carton sealing (largest market), product assembly, bookbinding, woodworking edge banding, automotive (interior trim), and electronics (component bonding). Per ASTM D4497 (hot melt tensile). Brands: Henkel (Technomelt), H.B. Fuller (Advantra), 3M, Bostik.