What kind of hot melt adhesive particles are used for the automatic sealing line of cardboard boxes? 7 Selection Checklist

Directly provide the list: automatic sealing line selectionHot melt adhesive granulesCheck these 7 items

The automatic line has a fast pace and continuous operation, requiring much higher stability of the glue than manual operation. Confirm the following 7 items one by one, which can reduce three types of high-frequency faults: gun blockage, wire drawing, and explosion.

How to view each item individually

• viscosityThe automatic line relies on a gear pump to apply glue, but the viscosity is too high and the pump cannot move, resulting in poor atomization; If it is too low, the spraying will be unstable and prone to drawing.
• Opening hoursThe faster the line speed, the shorter the opening time, otherwise it will dry out before pressing and cause false sticking and bursting.
• thermal stabilityThe automatic glue pot is kept on for a whole day, and the glue with poor thermal stability will carbonize deeper and clog the gun in the afternoon. When selecting, check the thermal aging data.
• low-temperature resistanceIf the goods are shipped in the northern winter or cold chain, antifreeze type must be used, otherwise the glue will break in the hands of the customer.

Small batch verification before going online

First, run one or two lines on the new glue for half a day: check if the glue is evenly sprayed and if there is any wire drawing; Take several sealed samples for “drop test” (1.2m free fall 3 times without bursting); Re check in a low-temperature environment for 24 hours. Replace all three items in full.

FAQ

Q: Can manual sealing glue be directly applied to the automatic line?
Answer: Most likely not. The viscosity and opening time of handmade adhesive do not match the pumping and line speed, which can easily cause gun blockage and false adhesion.

Q: Why is it easier to block guns in the afternoon than in the morning?
Answer: If the glue pot is kept at a constant temperature for a long time, the glue with poor thermal stability will gradually carbonize and accumulate dirt, which will worsen the gun blockage in the afternoon; Choose adhesive with good thermal stability and clean the machine regularly.

Q: Can anyone provide suggestions for automatic line selection?
Answer: Sure. Guangzhou Sunlife TradingSunlife Hot Melt AdhesiveThe packaging and sealing series are provided with models and process parameters based on line speed, glue spraying method (dot/thread/spiral), and temperature resistance environment, and support sample sending for machine testing.

Remember: the automatic line selects glue based on seven factors: viscosity, opening time, softening point, low temperature resistance, ash content, thermal stability, and odor. After passing the small batch test line, the full amount will be determined.