What are the characteristics of waterborne polyurethane adhesive?
Waterborne polyurethane adhesive is a new type of environmental protection adhesive, which has the advantages of strong adhesion, low moisture absorption and no organic solvent. It is widely used in automobile manufacturing, shipbuilding, architectural decoration and furniture manufacturing. So, how does it achieve bonding?
waterborne polyurethane adhesiveIt is a new type of environmental protection adhesive, which has the advantages of strong adhesion, low moisture absorption and no organic solvent. It is widely used in automobile manufacturing, shipbuilding, building decoration and furniture manufacturing. So, how does it achieve bonding?
First of all, aqueous polyurethane adhesive molecules contain multiple interaction groups, through the interaction between molecules to achieve adhesion. Secondly, the water-based polyurethane adhesive contains a certain proportion of water, which can form hydrogen bonds with the surface of the material to be bonded, thereby achieving physical adsorption. In addition, the water-based polyurethane adhesive can also achieve chemical crosslinking through its own chemical reaction, so that the bonding is more solid.
In summary, the bonding principle of waterborne polyurethane adhesive is achieved through intermolecular interaction, physical adsorption and chemical crosslinking. These three mechanisms complement each other and act together on the surface of the material to be bonded, thus achieving an efficient, environmentally friendly and firm bonding effect, making its application range more and more extensive.
Compared with traditional glue, waterborne polyurethane glue has some unique advantages, such as environmental protection, high strength, excellent moisture absorption, high temperature resistance, certain elasticity, etc. So, what are the reasons for these differences?
First of all, the main chain of the water-based polyurethane glue contains a certain proportion of hydrophilic groups, such as hydroxyl, carboxyl, etc., which makes it have a certain "hydrophilic" characteristic, which is easier to be compatible with the water-based system than the traditional glue. In addition, the water-based polyurethane adhesive contains less organic solvents, thereby reducing its impact on the environment and being more environmentally friendly. Similarly, the aqueous polyurethane adhesive can also achieve a variety of different physical properties by adjusting its components and complexes, such as moisture absorption, high temperature resistance, etc., so that it has a wide range of applications.
To sum up, the difference between its advantages and traditional glue is mainly caused by its molecular structure, hydrophilicity, environmental protection, adaptability and other characteristics. With the continuous optimization and development of its performance, the application prospect of waterborne polyurethane adhesive will be more and more extensive.
It is an environmentally friendly glue. This glue has many advantages, including the following five points:
1. It has excellent initial viscosity, that is, it can reach the initial viscosity in a very short time, which effectively improves the production efficiency. At the same time, its strong viscosity is also very strong, and it can maintain the viscosity for a long time without affecting the service life of the product.
2. Waterborne polyurethane adhesive has good water resistance and weather resistance, can maintain viscosity in water for a long time, is not easily affected by water, ultraviolet light and other climatic factors, and will not reduce viscosity and aging, so it is better in humid environment and outdoor use.
3. Compared with other glues, the volatility of water-based polyurethane glue is much lower, does not produce peculiar smell, is harmless to the environment and human health, and meets environmental protection standards.
4. The water-based polyurethane adhesive is evenly coated, has strong fluidity, is easy to operate, can be coated on the surface of various materials, and the color is transparent after drying, and will not pollute the bonding surface.
5. Waterborne polyurethane adhesive is suitable for bonding various materials, such as wood, metal, plastic, etc. And can be used for the production of shoes, wigs, car interiors, furniture, tape and other products.
In short, waterborne polyurethane adhesive has many advantages, such as good initial viscosity, strong adhesion, water resistance, weather resistance, low volatility, environmental protection, strong operability, multi-purpose and so on, so it is widely used and sought after.
Related News