What is hot melt adhesive aging?

Aging of hot melt adhesive is relatively common in its application. This phenomenon is mainly caused by heating the glue for a long time or the heating temperature is too high. How do you know that the hot melt adhesive has aged?

The aging hot melt adhesive may appear in the following phenomena:

1. Discoloration of glue;
2. There is black carbide in the glue;
3. Performance attenuation (temperature resistance and viscosity decrease);
4. Changes in thin consistency (thickening or thinning);
5. The melting point is lowered;

The aging phenomenon that occurs is generally caused by the improper use of hot melt adhesives. It may also be stored for a long time before use. The surface of hot melt adhesives begins to oxidize, and dust and microorganisms are attached. As long as the storage space is dry, tidy, and used properly, the hot melt adhesive will not age when it is used, so there is no need to worry about its performance.

WinLong is a hot melt adhesive manufacturer, if you would like to learn more, please contact the adhesive experts at internetwoodglue.com. We have served customers in dozens of industries and can meet all your adhesive needs