The Future of Reactive Polyurethane Hot Melt Adhesives

In the future, under the trend of globalization of the hot-melt adhesive industry, the demand will be more diversified, and hot-melt adhesive companies that gradually scale up will have enough strength to conduct basic research, so as to gain advantages in the market with serious product homogeneity. Therefore, the development of technology is almost inevitable.

1. High strength hot melt adhesive
Adhesive strength is the core performance of adhesives. Hot melt adhesives must be used in some occasions that require extremely high strength, especially in occasions that are subjected to large structural stresses, and the adhesive strength must be improved.

Strong polarity and good wettability are the characteristics of the adhesive to achieve high bonding strength. The reactive polyurethane hot melt adhesive has no solvent, and the fluidity and wettability are the short boards. Improve the adhesion of the reactive polyurethane hot melt adhesive The strength mainly starts from the polarity and wetting properties of reactive polyurethane hot melt adhesives.

2. High-speed response polyurethane hot melt adhesive
The high efficiency of reactive polyurethane hot melt adhesives is recognized because as soon as the hot melt adhesive cools, it hardens and forms 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, the sizing speed of reactive polyurethane hot melt adhesives may be further increased to expand this advantage, mainly from the aspects of accelerating hardening speed, increasing thermal viscosity, reducing specific heat of materials, and optimizing equipment.

3. Low temperature reactive polyurethane hot melt adhesive

Glue application temperature is one of the top concerns of materials engineers. Low gluing temperature can not only reduce material damage, prolong the service life of equipment, save energy consumption, but also reduce the public welfare effect of carbon emissions. Therefore, low-temperature hot-melt adhesives are definitely a promising research direction.

4. Low-density reactive polyurethane hot melt adhesive
In many cases, reducing material density to achieve lightweight has many advantages such as reducing energy consumption and saving resources. The bonding strength of the adhesive actually depends on the bonding area, rather than the weight of the adhesive itself, so low-density hot-melt adhesives have become a reliable research direction.

Low density can be achieved not only by increasing the material density (such as using polyolefin raw materials), but also by manufacturing processes, such as foaming hot melt adhesives.

5. Odor-free hot melt adhesive
In the context of people's increasing health concerns, especially in industries such as automotive, hygienic materials, food, toys, furniture, etc., odorless hot melt adhesives are the best products to reduce the anxiety of end consumers.

Odorlessness 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.

6. Materialized reactive polyurethane hot melt adhesive

It will become the development trend of hot melt adhesives to make hot melt adhesives into film, mesh, strip and wire materials by special molding process. Today's hot-melt adhesive film, hot-melt adhesive omentum, hot-melt adhesive tape, and hot-melt adhesive line market are developing rapidly. The combination of this hot-melt adhesive material and other materials is more conducive to the downstream enterprises to achieve large-scale production and cleaning production.

7. Degradable reactive polyurethane hot melt adhesive

Environmental protection is a major trend, and environmental protection is also a relative concept. Although reactive polyurethane hot melt adhesives belong to environmental protection adhesives, they are limited to environmental protection that is harmless to the human body, not environmental protection in terms of recycling or degradability. Protect. In the future, if hot melt adhesive products that are easy to recycle or naturally degrade can be developed, there will be good development prospects.

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