As a new type of environmental friendly chemical product that can change its shape with temperature, and is colorless and odorless, it has been widely used in product bonding in various industries. There are many types of hot melt adhesives, including block, rod, granular, and other forms. Therefore, the production formula and material ratio are different, especially in summer and winter, where the viscosity difference under the influence of the climatic environment is obvious. Of course, in addition to these climatic factors and formula differences, the use scenarios and items of hot melt adhesives can also be a certain factor that affects the viscosity. If the desired viscosity is not achieved when using, how can it be best used?

1. Apply pressure. The hot melt adhesive provides a certain amount of external pressure when bonding with the object to be bonded. Pressing tightly allows the adhesive to fully adhere to the object before solidification, squeezing out the air in the bonding area to better penetrate into the hole gaps of the material, thereby enhancing the adhesive force


2. To improve the surface roughness of an object, the roughening of the object surface can actually improve the penetration strength of the glue liquid, which can greatly increase the contact density point between the colloid and the adhered object, and enhance the viscosity.


3. Adding tackifiers, the main function of tackifiers is to enhance viscosity, which can improve the fluidity of the colloid and the wettability of the adhered object, thereby improving the adhesive performance.


Of course, different styles of hot melt adhesives have different functional properties, such as some with higher melting points. While some have a short cooling time and want good viscosity, when purchasing, it is necessary to select the appropriate one based on the use scenario and items and adopt the correct bonding steps to maximize the optimal viscosity of the hot melt adhesive.

   2023-3-21