On a global scale, packaging and sealing are constantly developing towards environmental protection, high speed, precision, and full automation. The hot melt adhesive sealing process will gradually replace traditional bundling packaging and tape packaging, which has the advantages of good packaging quality, beautiful appearance, and low cost.


The hot melt adhesive sealing process is to use a hot melt adhesive machine to melt the hot melt adhesive into a liquid, and then send it to the surface of the cardboard box through the throat and spray gun of the hot melt adhesive machine. After the hot melt adhesive cools down, the bonding is completed. Can meet all the requirements for sealing the box.


Advantages of using hot melt adhesive machine in sealing machine


1. Good packaging performance

Food packaging cardboard boxes must be able to withstand temperature, humidity changes, and rough handling requirements during transportation. However, using adhesive tape is difficult to meet this requirement because of its poor bonding strength, low tensile strength, and inability to adhere firmly to coated or oily cardboard. Hot melt adhesive has a good bonding force with objects, strong penetration, and plays a physical and chemical bonding role between corrugated paper and liner board. After bonding, the overall strength of the cardboard box is enhanced, and the cardboard box is not easily deformed or cracked. In addition, the hot melt adhesive coating system can apply adhesive pressure to key areas of various shapes, such as folding covers inside cardboard boxes.


Secondly, adhesive tape has poor low temperature resistance and is prone to cracking in cold northern climates; Hot melt adhesive has excellent low temperature resistance and can withstand temperatures as low as -40 ℃. Moreover, the storage period of hot melt adhesive is up to 2 years, with a small storage area and no special storage requirements; The shelf life of tape storage is only six months, and certain storage conditions are also required, otherwise it is prone to spoilage.


In addition, hot melt adhesive also provides excellent anti-theft function, as the adhesive penetrates into the corrugated paper, any attempt to open the cardboard box will tear the fibers. The tape can be cut open with a knife, and the contents can be taken away unconsciously and sealed again.


2. Beautiful appearance:


Nowadays, businesses require packaging to convey both the product and company image through the design of the packaging pattern while delivering the goods. Therefore, the fewer factors that hinder the appearance, the better. Adhesive tape often obstructs images and interferes with the transmission of packaging information; Hot melt adhesive is used to bond between the folded wings, providing a larger display space.

3. Low cost:


The use of hot melt adhesive for box sealing is fast, and the entire bonding process only takes 1-3 seconds to complete. It is suitable for mass production, with low energy consumption and low cost. In addition, hot melt adhesive is used, and adding glue during the processing will not cause downtime; Replacing the tape requires stopping the machine. Moreover, there is no need to install partitions inside the box, and the sealing strength is greater than that of using tape to seal the box with partitions inside, which can reduce the cost of partitions.