types of hot melt glu

Adhesive strength is the core performance of hot-melt adhesives. If hot-melt adhesives are to be applied to occasions that require extremely high strength, especially those that are subject to large structural stresses, the adhesive strength must be improved.

Strong polarity and good wetting are often the characteristics of adhesives that can achieve high bonding strength. Since hot melt adhesives do not have solvents, their fluidity and wettability are short boards. To improve the bonding strength of hot melt adhesives, the main Start with the polarity and wettability of hot melt adhesives.

The high efficiency of hot melt adhesives is recognized by everyone, because as long as the hot melt adhesive cools down, it can harden and form a bond. The bonding speed of cigarette holder sticks can reach 20,000 pieces/minute, book binding can reach 18,000 books/hour, and the production of diapers can reach 1,000 pieces/minute.

In the future, it is possible to further increase the sizing speed of hot melt adhesives and expand this advantage, mainly by accelerating the hardening speed, improving thermal adhesion, reducing material specific heat, and optimizing equipment.

Glue sizing temperature is one of the most concerned issues for material engineers. Low gluing temperature can not only reduce material damage, prolong the service life of equipment, save energy consumption, but also reduce carbon emissions. Therefore, low temperature hot melt Glue will definitely be a promising research direction.

In many occasions, reducing material density to achieve lightweight has many advantages, such as reducing energy consumption and saving resources. The bonding strength of adhesives is actually more dependent on the bonding area than the weight of the glue itself, which makes low-density hot-melt adhesives a reliable research direction.

Achieving low density can be achieved not only by improving material density (such as using polyolefin-based raw materials), but also by manufacturing processes, such as foaming hot-melt adhesives.

Under the situation that people are paying more and more attention to health, especially in industries such as automobiles, hygiene materials, food, toys, furniture, etc., odorless hot melt adhesives are the best products to reduce the doubts of end consumers.

Odorless should be achieved by improving raw materials, minimizing small molecular substances, and using low-odor or even odorless raw materials, such as hydrogenated rosin esters.

Through a special molding process, making hot melt adhesives into film, mesh, strip, and thread materials will become a development trend of hot melt adhesives. Nowadays, the market of hot-melt adhesive film, hot-melt adhesive omentum, hot-melt adhesive tape, and hot-melt adhesive line is growing rapidly. Such hot-melt adhesive materials are compounded with other materials, which is more conducive to the realization of large-scale production and clean production of downstream enterprises. 

Environmental protection is a major trend, and environmental protection is also a relative concept. Although hot melt adhesives are environmentally friendly adhesives, they are limited to environmental protection that is harmless to the human body, rather than environmental protection on the level of recycling or degradability. In the future, if we can develop hot melt adhesive products that are easy to recycle or can be naturally degraded, there must be good development prospects.