3 сентября, 2015 
Malyar A. Pizzi
Ecole Nationale Superieure des Technologies et Industries du Bois, Universite de Nancy I, Epinal, France
Hot melts are a widely used class of adhesives that are used for many applications but are rarely used for structural bonding, as seldom are they able to match the tensile strengths of other adhesive classes. Their primary uses are in packaging and in wood for edge veneering and veneer splicing. There are important reasons for employing hot-melt adhesive systems, such as:
1. Ease of Application via high-speed equipment
2. Formation of strong, permanent, and durable bonds within a few seconds of application
3. No environmental hazard and minimal wastage because of 100% solid systems
4. Ease of handling
5. Absence of highly volatile or flammable ingredients
6. Excellent adhesion
7. Wide formulation possibilities to suit individual requirements (e. g., color, viscosity, application temperature, and performance characteristics)
8. Cost-effectiveness
Hot melts are 100% solid thermoplastic materials that are supplied in pellet, slug, block, or irregular-shaped chip form. They require heating via appropriate application equipment, which usually is fairly sophisticated in order to control the required temperature and coverage rate. Upon application, the heat source is removed and the thermoplastics set immediately (within a few seconds). Hot melts are thus well suited to high-speed continuous-bonding operations.
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