Localized infrared heating was applied to a hot melt adhesive using a halogen point heater.
As heating progresses, the adhesive softens from its solid state, then melts and begins to flow. This video captures the softening, melting, and dripping behavior that occurs in the region where infrared energy is concentrated.
Hot melt adhesives are primarily composed of thermoplastic resins. Their viscosity decreases when heated, and they solidify again upon cooling. They are widely used in packaging, bookbinding, automotive components, electronic devices, and construction materials.
Because infrared heating can deliver energy locally without contact, it enables rapid softening and melting of adhesives. This video visualizes the thermal response and flow behavior of a hot melt adhesive.
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