Hot melt adhesives are thermoplastic materials that are solid at room temperature but melt when heated. They are commonly used in various industries for bonding materials like paper, wood, and plastics. When applied, these adhesives cool quickly, forming a strong bond as they solidify. These adhesives are popular due to their fast setting time and versatility. They can be used in applications ranging from packaging to furniture assembly. Hot melt adhesives are also easy to apply, often using a hot glue gun, making them accessible for both industrial and DIY projects.