Brief analysis of the application of hot melt adhesive in carton packaging and sealing
As a new type of carton and carton packaging and sealing, hot melt adhesive sealing has partially replaced the traditional bundled packaging and tape packaging, and is used in various food carton outer packaging and wine, dairy products and other carton packaging. On the outer packaging. Due to the advantages of good packaging quality, beautiful appearance and low cost, the application of hot melt adhesive sealing will become more and more extensive.
Advantages of hot melt sealing
Hot melt adhesive sealing is to use the hot melt machine to melt the hot melt adhesive into a liquid, and then to the surface of the carton through the throat pipe and spray gun of the hot melt machine. After the hot melt adhesive is cooled, the bonding is completed. It can meet the requirements of carton sealing, and overcome the defects of traditional carton sealing.
Good packaging quality
Transport cartons must be able to withstand changes in temperature, humidity, and rough handling, but it is difficult to meet this requirement with tape because of poor adhesive strength, low tensile strength, and poor adhesion to coated or oily cardboard.
The hot-melt adhesive has a good binding force with wet objects and strong penetration. It can play a physical and chemical bonding role between corrugated paper and liner board. The overall strength of the bonded carton is enhanced, and the carton is not easy to deform and crack. In addition, the hot-melt adhesive application system can apply adhesive to key parts of various shapes, for example: folding lid in carton.
Secondly, the self-adhesive tape is poor in low temperature resistance, and it is easy to open the adhesive in the cold climate in the north; the hot melt adhesive has good low temperature resistance and can withstand -40 ℃ low temperature. Moreover, the storage period of hot melt adhesive is as long as 2 years, the storage area is small, and there is no special requirement for storage; while the storage period of the adhesive tape is only half a year, and certain storage conditions are required, otherwise it will be easily deteriorated.
Hot-melt adhesives also provide good anti-theft function. As the adhesive penetrates into the corrugated, any attempt to open the carton will tear the fiber. The tape can be cut open with a knife, and the contents are taken away unconsciously and sealed again.
low cost
Using hot-melt adhesive to seal the box quickly, the whole bonding process can be completed in 1 ~ 3 seconds, suitable for mass production, low energy consumption and low cost The sealing cost of standard corrugated cardboard box hot melt adhesive is about 32 yuan / 1000 boxes, which is the middle price of hot melt adhesive, and the middle price of tape sealing is about 120 yuan / 1000 boxes.
If hot-melt adhesive is used, adding glue during processing will not cause downtime; while changing the tape requires downtime. Moreover, the partition may not be installed in the box, and the sealing strength is greater than the sealing strength of the internal partition when the tape is used for sealing, which can reduce the cost of the partition.
Beautiful appearance
Nowadays, merchants require packaging to convey products and at the same time, they can also communicate the product and company image through the packaging design. Therefore, the fewer the factors that hinder the appearance, the better. Tape often blocks the image and interferes with the transfer of packaging information; while hot-melt adhesive is bonded between the flaps to provide a larger display space.
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