How to arrange the glue points for sealing hot melt adhesive particles? These 6 glue removal misconceptions are the most time-consuming and not yet firmly adhered to

Direct answer: The most secure arrangement for sealing and gluing points is to leave 20-30mm at both ends, evenly distribute in the middle, and cover a total length of about 60% -70% of the sealing length. The common three-point, five point, and strip continuous methods have their own applicable scenarios. Choosing the wrong arrangement not only consumes glue, but also opens the box when it needs to be opened.

Industry Status: Few people have seriously considered the arrangement of adhesive dots

The gluing parameters of most packaging factories are “left behind by the previous master”. The box type has been changed, the cardboard has been changed, and the line speed has been increased, but the parameters have not been changed. It shows two extremes: either the glue dots are everywhere, with high cost and poor appearance; Either the adhesive dots are sparse and loose, and they will curl up when transported.

The six most common glue removal misconceptions

• Misconception 1: The more adhesive points there are, the stronger it becomes.As the number of points increases but the amount of glue dispensed decreases, the opening time of each point is shortened, and most of the points have already formed a film during compression.
• Misconception 2: Just stick the glue in the center.The two ends and corners of the cardboard box are subjected to the greatest force, with the middle fully filled and the two ends empty. The corners are the first to curl during transportation.
• Misconception 3: The closer the glue points are, the better.Less than 10mm away from the edge, it is easy for the glue to overflow onto the outer surface, adhere to adjacent boxes, and also dirty the conveyor belt.
• Misconception 4: One type of layout can accommodate all types of boxes.A small box with three points is sufficient, while a large box or heavy cargo must be encrypted and the tape segments at both ends must be extended.
• Misconception 5: Only adjust the amount of glue without adjusting the pressure.The pressing time is insufficient, and no matter how much glue is applied, it will only stick to the surface.
• Misconception 6: If the line speed is increased and the parameters are not changed.After the speed increases, the distance between glue drops automatically becomes longer, and the glue spraying frequency needs to be adjusted synchronously.

Comparison of three arrangement methods

Suggestion for Parameter Adjustment Sequence

• Initial coverage rate: Calculate the total adhesive length based on 60% to 70% of the sealing length.
• Redefine the end: The first adhesive point at both ends is 20-30mm away from the edge, which is the key to preventing warping.
• Finally, determine the middle: evenly distribute the remaining length to avoid uneven density.
• After the trial run, perform a drop and unboxing inspection. When peeling off, the cardboard fibers should be torn instead of the adhesive film completely peeled off.

Sunlifehot melt adhesiveThe cooperation

When Guangzhou Sunlife supplies packaging and sealing customers, they will recommend Sunlife hot melt adhesive models with suitable opening times based on line speed and box type. It is recommended to choose models with high initial adhesion and short opening time for high-speed lines, in combination with dense points; For manual sealing or low-speed lines, use models with slightly longer opening times to leave a compression window for operation.

Frequently Asked Questions

What should I do if the glue point layout is adjusted or curled?

First check the pressing time and pressure, and then confirm whether the cardboard box has film covering or excessive starch dust, both of which will prevent the glue from wetting the paper surface.

Can a continuous strip be used to replace all points?

Sure, but the glue consumption usually increases by more than 30%, and is generally only used on heavy goods, long-distance transportation, or export containers.