A hot melt performs only as well as the equipment that melts and applies it. The right equipment affects both quality and adhesive consumption.
Melter types
- Tank melters: For granules or pillows. Common on packaging and general assembly lines.
- Drum / pail unloaders: Melt only the surface; ideal for moisture-curing PUR because the adhesive has minimal air contact.
- Cartridge systems: A practical solution for low-volume work and PUR.
Hoses and guns
Heated hoses are set to the same temperature as the tank or slightly higher. Guns are chosen for dot, bead, spiral or spray application.
Applicator heads
| Head | Use |
|---|---|
| Bead nozzle | Case sealing, assembly |
| Slot nozzle | Lamination, labels, profile wrapping |
| Spray / spiral | Large areas, nonwovens, filters |
| Roller | Edge banding, flat lamination |
Maintenance tips
- Do not leave the tank nearly empty; small amounts held at high temperature char.
- Clean filters regularly; charred particles block nozzles.
- Check compatibility when changing adhesive type and flush the system with a cleaning agent if needed.
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