Can hot melt adhesive be reused?
Hot melt adhesives are widely used in electronic components, metals, wood, toys, furniture, handicrafts, ceramics, textiles, lampshades and other industries, all need hot melt adhesives.
Someone asked before: Can hot melt adhesive be reused? If it can be used repeatedly, the economical utility is not particularly good.
In fact, it is theoretically possible to use hot melt adhesive once or twice more. However, if it is used too many times in the actual environment, it will definitely affect the effect of hot melt adhesive. Why is this?
Hot melt adhesive generally needs to be heated and melted before use. However, if the number of heating times is too large, the molecular structure of the hot melt adhesive will be unstable, and the phenomenon of aging will occur, which will affect the performance of the hot melt adhesive itself. Therefore, if there is an uncertain impact on the hot melt adhesive bonding effect. Generally speaking, the more heating times, the more unstable the hot melt adhesive. Heating causes the molecules to become overactive. There are generally two consequences. 1. The performance of hot melt adhesive is weakened. Second, carbides appear. The performance continues to weaken, reaching the critical point of carbide, and carbide will appear.
Therefore, if it is for a material that requires a particularly high sticking effect, in order to be safe, it is necessary to avoid the use of aging glue. Use as much as possible. I really don’t know the amount. For the second use, you can add a certain proportion of hot melt adhesive and mix the original hot melt adhesive. This can avoid too much change in the properties of the hot melt adhesive and affect the bonding effect.
