What is the difference between solvent and hot melt adhesive?
October 11, 2023
Solvent and hot melt adhesives are two different types of adhesives that are used for various applications. The main difference between them lies in their composition and mode of application.
Solvent adhesives, also known as liquid adhesives, are composed of a solvent (liquid) and a polymer (solid). They are applied in liquid form and then the solvent evaporates, leaving behind a solid adhesive bond. Solvent adhesives are commonly used in industries such as woodworking, packaging, and automotive. They provide strong bonds and are known for their ability to bond a wide range of materials, including plastics, metals, and wood. However, they often require longer drying times and can emit volatile organic compounds (VOCs) during the drying process.
Hot melt adhesives, on the other hand, are solid adhesives that are melted and applied in a molten state. They are composed of thermoplastic polymers that become liquid when heated and solidify upon cooling. Hot melt adhesives are commonly used in industries such as packaging, bookbinding, and product assembly. They offer fast bonding, as they solidify quickly upon cooling, and do not require any drying time. Hot melt adhesives are applied using specialized hot melt glue guns or other dispensing equipment. They provide strong bonds and are suitable for bonding a wide range of materials, including plastics, fabrics, and metals.
In summary, the main difference between solvent and hot melt adhesives lies in their composition and mode of application. Solvent adhesives are liquid adhesives that dry by evaporating the solvent, while hot melt adhesives are solid adhesives that are melted and applied in a molten state.
