With the upgrading and transformation of industrial products, the demand for hot melt adhesives is also rapidly increasing. Our company provides users with various application-specific hot melt adhesives, earning a good reputation. These products mainly include high, medium, and low viscosity adhesives, as well as customized products in different colors. This article introduces some basic knowledge about hot melt adhesives for everyone to learn and discuss.
- Premature curing of adhesive lines
This is often caused by insufficient adhesive or improper temperature settings.
Consequences: The adhesive may not fully adhere properly upon unpacking or may appear to be properly bonded.
- Slow Curing Speed
This is often caused by excessive glue dosage, excessively high temperature/pump pressure, nozzle diameter too large, or uneven pressure in the packaging machine.
Consequences: Unpacking/False Bonding/Increased Glue Costs
- Nozzle or Glue Tube Clogged
Causes: Hot melt adhesive is too viscous; carbon deposits or gel formation; foreign objects in the glue tank, etc.
Solutions:
- Increase temperature or use a lower viscosity hot melt adhesive.
- Clean the glue spraying system or lower the temperature, or change the adhesive.
- Clean the glue tank and standardize glue addition.
- Drip/Spray of Adhesive Causes: Dirty or damaged nozzle; foreign objects or wear inside the nozzle valve; loose or leaking solenoid valve; unstable or insufficient air pressure.
Solutions:
- Clean the nozzle.
- Inspect or replace.
- Reinstall and confirm.
- Reset and check for compliance.
- Hot Melt Glue Splattering Causes: Excessive glue pressure; excessively high temperature; too low viscosity; incorrect nozzle position.
Solutions:
- Adjust the glue pump pressure to reduce pressure.
- Reduce temperature.
- Reduce temperature and decrease the distance between the spray gun and the object.
- Change the nozzle position.