How to Choose the Right Hot Melt Adhesive for Packaging Lines
The correct hot melt on the packaging line is not only shut down the carton; it is the product that increases the speed of the line and protects the bond in short compression time. Cardboard coating changes the result of the choice of recycled fiber ratio, cold surface, filling temperature and shipping environment.
Define carton and coating structure
Kraft, bird, liquefied, printed or high recycled cartons have the same surface energy and absorbency. It is necessary to penetrate the adhesive controlled to the fibers and wet the surface. Sample test should be done on the surfaces representing different suppliers and lots, not only in the new carton.
Line speed, open time and compression time
The time between the application and the closing of the covers is open to the time; the distance and conveyor speed of the caps are kept under pressure correspond to the first need for fixing. Very fast setting can freeze adhesive early within long mounting distance. Very slow adjustment can open the cover and reprocess at the end of the line. Time should be measured with chronometer, should not be predicted.
Storage and shipping conditions
The box can be softened in hot storage or vehicle; it can be exposed to brittleing in the cold chain. The heat resistance in TDS and low temperature information provide pre-exposition, but hot-cold cycles to be done under the actual carrying load of the filled box are more meaningful. The product weight should be added to the test plan of the stack height and the humidity change of the carton.
Application system and consumption
Point, short bead or intermittent pattern; box geometry and selected according to the required bond area. The small orifis stability that often clogged while increasing large nozzles and long bead consumption. The target is not only minimal grammage; sufficient bond safety, clean cut, accurate location and sustainable maintenance range.
Application control list
- Include carton coating and supplier variable to sample.
- Measure application-off and compression times.
- Make box test full of real storage temperatures.
- Watch Gram/box value and fire together.
- Match the required bond area with nozzle pattern.
Conclusion
Packing hot melt selection starts with the description of cardboard-hat-depolama triple before product price. The suitable product ensures low consumption without compromising connection safety.
Manstechnic approach
Manstechnic optimizes product, nozzle pattern and temperature window through carton sample and line data.