With the continuous development of the economy, there is a rapid development trend in packaging, sanitary and medical supplies, daily necessities, shoe materials, electronics, automobiles, wood, cosmetics, building materials, furniture, handicrafts, and stone materials.
In line with the development of the times, hot-melt adhesives play an indispensable position in many fields. The domestic hot-melt adhesive industry has been developing for more than 30 years, and some hot-melt adhesives only appeared in the country in the mid-1980s. Manufacturers, whose products are mainly for the manufacture of book binding and hot melt adhesives for women’s sanitary napkins. However, their production scale is small and the development is slow. In 1993, the national hot melt adhesive output was only close to 10,000 tons. With the continuous deepening of reform and opening up With the further improvement of the level and scale of the factory, the hot melt adhesive industry has also entered a period of rapid development.
However, there are still many people who don’t know how to choose hot melt adhesives. What are the parameters of hot melt adhesives that affect its quality. The following is the answer given by our official Poseidon Material Technology technicians who have been working for many years. I hope to bring you Some help.
What are the parameters of hot melt adhesive?
What are the parameters of hot melt adhesive?
- Viscosity: Affects fluidity, permeability, spraying performance, glue temperature, wire drawing, glue output, etc.
- Softening point: The softening point of hot melt adhesive is the temperature at which the glue becomes fluid and has fluidity. The softening point directly affects the high and low temperature resistance of the hot melt adhesive. The reason for the softening point is that different raw materials are used, that is, hot melt adhesives with different materials have different softening points.
- Opening time: Affects the speed of use, permeability and bonding strength.
- Curing speed: affect operation suitability, permeability and bonding strength.
- Affinity: Affect the bonding strength.
- Cohesion: Affects transfer resistance, peel strength or shear chord.
- Thermal adhesion: affect the bonding effect.
- Temperature resistance: affect the temperature that the final bonding system can withstand. The maximum temperature and minimum temperature exceed this type of hot melt adhesive. For example, the performance of this type of adhesive is high temperature resistance of 120 degrees, and low temperature resistance of minus -10 degrees. When the temperature exceeds 120 degrees, it will lose its viscosity and cause degumming. Circumstances, or degumming will occur when the ambient temperature is lower than minus -10 degrees. The temperature resistance of hot melt adhesives of different materials is different.
- Equipment and technology and other foundations will affect the effect of hot melt adhesive.