Hot-melt adhesives (also known as hot glues) are generally 100% solid formulations based on thermoplastic polymers (no water or solvents are involved). Hot melts are sold in a solid state at room temperature and are ‘activated’ upon heating beyond their softening point which is usually between 50 and 250 degrees. Once melted (in a hot melt tank), the adhesive can then be applied onto a substrate in its liquified or molten state.
When a hot-melt adhesive is being cooled back to room temperature, it rapidly builds up its internal strength. The solidified state of a hot melt is where it has structural integrity and can function as an adhesive. Hot glues can be applied onto a substrate in many ways (when they are in liquid form) such as via a roller or more commonly being jetted or sprayed from a nozzle or gun. There are also many different types of application patterns such as spiral sprays, dots, and continuous lines.
Hot-melt adhesives are used in both the commercial and residential sectors across many different industries for countless applications. You can find hot melts in food packaging, woodworking, product assembly, labeling, children’s toys, arts and crafts, and so forth. At Beardow Adams, our adhesives bond all kinds of packaging, the spines of books, the layers of fabric in nonwovens, labels on bottles, and the edging on furniture – to name just a few applications.
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