What is the operating temperature range of the hot melt adhesive

Hot melt adhesives typically operate in a temperature range of 70°C to 180°C, depending on the type and formulation of the hot melt adhesive. Hot melt adhesives are melted by heating and then combined with the substrate to form a bond after cooling. Common types of hot melt adhesives include polyolefin (PO), polyester (PET), polyurethane (PU), etc., and different types of hot melt adhesives have different properties such as melting point, viscosity and strength.

In practice, there are several factors to consider when selecting the right hot melt adhesive, including the nature of the material to be bonded, ambient temperature, humidity, and the usage scenario. For example, in industries such as automotive, electronics, and packaging, the temperature resistance and toughness of hot melt adhesives are important performance indicators. In high-temperature environments, it may be more appropriate to choose a high-temperature hot melt adhesive, which can operate at temperatures above 200°C.

In addition, the curing time of hot melt adhesives is also closely related to the application temperature, and the curing speed is fast at high temperatures, which helps to improve production efficiency. However, in practice, it is important to ensure that the temperature of the heating equipment is precisely controlled to avoid overheating of the hot melt adhesive which can lead to degraded performance or uneven melting.

Overall, the selection and application of hot melt adhesives requires a comprehensive consideration of the operating temperature range, which is critical to ensure the final bond.