Can EVA hot melt adhesive be reused?

Can EVA hot melt adhesive be reused? Hot melt adhesive is widely used in industries such as electronic components, metals, wood, toys, furniture, handicrafts, paper products, textiles, packaging, etc., all of which require hot melt adhesive.

Someone asked before: Can EVA hot melt adhesive be reused? If it can be reused repeatedly, isn’t the economic utility particularly good?

In fact, theoretically, hot melt adhesive can be used one or two more times. However, if used too many times in actual environments, it will definitely affect the effectiveness of hot melt adhesive.

EVA hot melt adhesive generally needs to be heated and melted before use. However, excessive heating can cause the molecular structure of the hot melt adhesive to become unstable, leading to aging and affecting the performance of the hot melt adhesive itself. Therefore, there is an uncertain impact on the bonding effect of hot melt adhesive. Generally speaking, the more heating cycles, the more unstable the hot melt adhesive becomes. Heating can cause molecules to become overly active. There are usually two consequences. 1. The performance of hot melt adhesive is weakened. The second is the appearance of carbides. If the performance continues to weaken and reaches the critical point of carbides, carbides will appear.

Therefore, if it is a material with particularly high requirements for adhesive effect, for safety reasons, it is still necessary to avoid using aging adhesive.