How long does the curing time of hot melt adhesive particles for packaging and sealing usually last? A list that clearly states

Packaging and sealingHot melt adhesive granulesHow long does the curing time usually last?

The hot melt adhesive particles used for sealing can be initially cured in only 3-8 seconds from coating to reaching transportable strength, and fully cooled and set in about 20-30 seconds. Compared to water-based adhesive, it takes a few minutes to wait, which is why hot melt adhesive is irreplaceable on high-speed sealing lines. Below, use a checklist to clarify the key points at once.

List of factors affecting the curing speed of sealed boxes

• Rubber particle typeRapid solidification type sealed box particles have an initial solidification time of 2-4 seconds; Universal type 5-8 seconds.
• Coating thicknessThin adhesive layer solidifies quickly, thick adhesive layer dissipates heat slowly and sets slowly.
• substrate temperatureIf the cardboard box is too cold, it will absorb heat. In winter, increase the glue temperature or preheat the box appropriately.
• Ambient temperature and humidityWhen the temperature in the workshop is below 10 ℃, the curing process slows down significantly and insulation is required.
• Lamination pressureSufficient pressure to allow the glue to penetrate the fibers is more reliable than simply waiting for time.

Curing reference for different sealing scenarios

Frequently Asked Questions (FAQ)

Q: Does fast curing mean it sticks firmly?
Answer: Not necessarily. Fast initial solidification is beneficial for the production line rhythm, and the final fastness depends on the penetration and cohesive strength. Sunlife hot melt adhesive’s sealing particles balance both.

Q: Why does it solidify faster in summer and slower in winter?
Answer: Low temperature substrates absorb more heat, and the adhesive layer dissipates heat quickly but lacks penetration, resulting in “false solidification”, which requires insulation or fine adjustment of the adhesive temperature.

Q: Can it be re pressed and re bonded after curing?
Answer: The cooling of hot melt adhesive is irreversible, and when opened, it needs to be reheated and coated again. It cannot be repeatedly applied like tape.

Guangzhou Sunlife Trading can recommend Sunlife hot melt adhesive particles with corresponding curing speed according to your sealing cycle, and provide small samples for machine testing.