termofusible

Termofusible, commonly known as hot-melt adhesive, refers to a family of thermoplastic polymers that are solid at room temperature and melt when heated. When heated, the adhesive is applied in molten form and bonds surfaces as it cools and solidifies. Because no chemical curing is required, bonds form rapidly and can be reworked if re-heated.

Typical termofusible formulations include EVA (ethylene-vinyl acetate), polyolefins, polyamides, and polyurethane-based systems. Additives such as tackifiers are used to enhance initial grab, while others are optimized for heat resistance, flexibility, or clarity. The adhesive is commonly supplied as sticks or pellets for hot glue guns, but can also be available as bulk pellets for other melting equipment.

Applications span many sectors, including packaging, woodworking, textiles, crafts, bookbinding, footwear, and light electronics assembly. They offer fast set times, relatively low odor, and the ability to fill gaps between surfaces. They work well on many porous and non-porous substrates and are useful for temporary or semi-permanent assemblies.

Limitations include sensitivity to high temperatures and moisture, which can weaken or soften the bond. Some plastics with low surface energy (such as certain polyolefins) require surface treatment or special formulations for reliable adhesion. Long-term outdoor use or high-load structural applications may demand more heat- or chemical-resistant adhesives. Handling molten material requires care to avoid burns, and ventilation is advised in enclosed spaces.

See also: adhesives, hot glue gun, EVA.