Some hot melt adhesives have some problems after using them for a long time.
First, the hot melt adhesive is non-sticky:
1. Hot melt adhesive, if there is deterioration before production. Poor performance, stored for a long time, easy to produce qualitative changes, which will affect the performance of hot melt adhesive unstable hot melt adhesive.
2. The performance of hot melt adhesives. Due to insufficient permeability that will affect the bonding between piles, the condition and performance of the hot melt adhesive are relatively stable at the beginning, but over time, there may be page drops, cracking of the bonding interface, etc.
3. For example, the problem of page dropping, which is not necessarily caused by the performance of the hot melt adhesive. Before gluing, it is necessary to consider whether the hot melt adhesive penetrates the surface of books and journals well.
Second, the hot melt adhesive cannot be knocked off with glue:
1. Before using the hot melt adhesive, has it not been preheated to a certain time? (** Use daily hot melt glue gun, hot melt glue gun, must be warmed up in 4-6 minutes.) ）
2. Hot melt adhesives are easy to use and preserve, but also have a shelf life. Generally, the shelf life of hot melt adhesives is 1 to 1.5 years, so check whether the shelf life of hot melt adhesives has expired.
