Learn about hot melt adhesive systems for packaging applications.
Introduction to Hot Melt Technology
Hot melt adhesives are thermoplastic materials applied in molten state. The market exceeds $8 billion annually, with packaging as the largest segment.
Hot Melt Chemistries
EVA (ethylene-vinyl acetate) hot melts are most common for packaging. Metallocene polyolefin hot melts offer consistent performance and wider temperature range.
Application Considerations
Temperature control is critical. Operating below recommended temperature increases viscosity and reduces bond strength.
| Property | EVA | Metallocene |
|---|---|---|
| Application Temp | 175-190°C | 150-175°C |
| Bond Strength | Good | Excellent |
Frequently Asked Questions
What causes hot melt stringing?
Stringing occurs from excessive temperature or inappropriate viscosity.
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