Hotmelt is an adhesive that sticks quickly after application. This is possible because the hot melt adhesive cools quickly from its application temperature, usually it is
Different types of hot glue
over 160 ℃. Hot melt adhesives are also known as HMA, hot melt adhesives, and as glue cartridges and glue sticks.
The basis of a hot melt
The basis of a hotmelt is a polymer; standard mixtures are based on EVA or polyolefin. Other types are also conceivable, a completely different product group, but PUR hot melt adhesives are also regularly available. PUR hot melt adhesives and the less common POR hot melt adhesives are reactive adhesive systems that continue to crosslink with themselves and the bonded materials after the first bond, which takes place in the cooling phase.
Hot glue gun
Hot melts are usually applied with a glue gun, this can be a handheld glue gun, but often they are automatic application heads. The most frequently used brand is Nordson, the new Problue version is available from stock via the hotmelt service, both new and used. In addition to brands such as Nordson, there are also alternatives such as Robatech, Meler, UES, Bühnen and ITW dynatec.
Hotmelt has various technical properties, such as melting point and viscosity. These properties are important for correct processing on the devices. Non-contact spray devices are set to a viscosity of approx. 1,000 m.Pass as standard. Viscosity is a number that indicates the degree of viscosity of a liquid. Not only the viscosity but also the melting point is important. This temperature indicates when the hot melt adhesive becomes liquid and is therefore regarded as the minimum application temperature. The actually recommended application temperature is often significantly higher and is also specified on the technical data sheet of the hot melt adhesive.