How to understand the weather resistance of hot melt adhesive

The weather resistance of hot melt adhesive affects its application effect. Hot melt adhesive manufacturers need to adjust the heat resistance of hot melt adhesive according to different application environments to achieve ideal application performance.

The heat resistance of hot melt adhesive is closely related to its softening point. Hot melt adhesives with good heat resistance generally have a higher softening point. This hot melt adhesive is not easily affected by high temperatures and does not affect the bonding effect. But it does not mean that the softening point needs to be raised. High heat resistance indicates that the hot melt adhesive produced by the hot melt adhesive manufacturer has excellent performance.

Hot melt adhesive is needed in the hot south, but not necessarily in the cold north. Due to the generally cold temperature in the north, hot melt adhesives with good heat resistance have a high softening point, which makes it easy to produce when the optimal performance cannot be achieved during the production process, resulting in the inability of the adhesive liquid and the surface of the adhered material to achieve ideal penetration, ultimately affecting the bonding effect. Moreover, if the penetration of hot melt adhesive into the adhesive is insufficient, in cold weather, hot melt adhesive is generally harder and prone to delamination. Therefore, if using hot melt adhesive in areas with relatively low temperatures, one should choose one with a slightly lower softening point. It doesn’t matter if the heat resistance is poor. Mainly, attention should be paid to the fluidity and permeability of hot melt adhesive during use. Of course, if the product is to be sold to areas with higher temperatures, and the temperature in the hot melt adhesive application area is relatively low, it is necessary to choose hot melt adhesive products with higher heat resistance according to the actual situation.

Corresponding to the heat resistance of hot melt adhesive is its cold resistance. Hot melt adhesive has good heat or cold resistance. Hot melt adhesive manufacturers have segmented hot melt adhesives in their application environments. Heat resistance is generally a performance indicator of hot melt adhesive used in hot weather.