Hot melt adhesive sealing technology

I. Overview

For industrial enterprises, when the product is loaded into the carton, the next step is to face the problem of sealing. At present, the vast majority of enterprises generally use traditional U-shaped sealing nails and strapping plastic braids. And these sealing forms have certain defects more or less; if the adhesive force is not strong with sticky tape, special or oily paperboard will not stick at all. In addition, it is also prone to open gel in cold climate areas. Bundling plastic braids is costly and does not meet environmental requirements. Nailing easily affects the surface quality of the product packaging, and it is easy to damage the product inside the box.

Hot melt adhesive is a new type of sealing material that appeared in the 1960s. After more than 40 years of promotion, the hot melt adhesive sealing technology has developed into a major form of carton sealing in developed countries in the West. In China, when hot-melt adhesives first appeared, they were difficult to popularize due to their high prices. However, in recent years, domestic hot-melt adhesive companies have built factories in Guangdong, China, which has reduced costs and thus made hot-melt adhesives more economical. This laid the foundation for the widespread application of hot melt adhesives in China. At present, the application has become more and more popular in some large enterprises, especially foreign companies in Europe and the United States.

Second, the advantages of hot melt adhesive sealing

Hot melt adhesive is a kind of plasticity adhesive. Its physical state changes with temperature in a certain temperature range, and its chemical characteristics remain unchanged. It is non-toxic and odorless, and it is an environmentally friendly chemical product.

Hot-melt adhesive bonding is the use of a hot melt machine to melt the hot melt adhesive by heat. The adhesive becomes a liquid and is sent to the surface of the adhered material through the throat of the hot melter and the spray gun. The hot melt adhesive is cooled. The bonding is completed afterwards, it can meet the requirements of the carton sealing, and overcomes the defects existing in the previous carton sealing forms.
Hot melt adhesive advantages:
1, fast, the entire bonding process takes only 1-3 seconds to complete (even faster).
2. It occupies less space and the body of hot-melt adhesives is small and requires only a small space.
3. The lowest production cost per unit product.
4. Adhesive effect is good, adhesive strength is high, and the overall strength of the bonded carton is strengthened, making the carton not easy to deform and crack.
5, no treatment waste problem. Meet environmental requirements and meet export packaging requirements.
6, with anti-theft effect, can be cited whether the package was opened without permission.
7, can adjust the different spray mode, in order to play a role in identification and anti-counterfeiting.

Third, the comparison of the hot melt adhesive and the traditional sealing tape, packing tape in the carton sealing application
A hot melt adhesive and sealing tape in carton sealing application

B hot melt adhesive and packing tape application in carton sealing

Fourth, hot melt adhesive and hot melt adhesive machine

To take advantage of hot-melt adhesives in carton sealing, it is necessary to use high-quality hot-melt adhesives and corresponding hot-melt adhesives with reliable quality to match.

In the hot melt adhesive equipment, when selecting the hot melt adhesive, comprehensive consideration should be given to cost and efficiency. According to speed requirements, package shape and sealing form, production site, layout of the appropriate hot-melt adhesives equipment and hoses, nozzles and ancillary equipment to achieve automatic spray or semi-automatic spray, and then play the advantages of hot-melt adhesives To achieve maximum results and economic benefits. In this regard, it is possible to consult a professional hot-melt adhesive machine manufacturer. Generally speaking, the use of automatic or semi-automatic spray adhesives is more effective than manual methods in terms of the speed and cost advantages of hot-melt adhesives in sealing.

Source: China Packaging Standards Network