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Hot melt adhesive granules are a type of plastic adhesive. Within a certain temperature range, its physical state changes with temperature, while its chemical properties remain unchanged. It is non-toxic and odorless. It is an environmentally friendly chemical product. Easy to package, transport, and store, solvent-free, pollution-free, and non-toxic. Some hot melt adhesives may encounter problems after long-term use. So how to deal with the problems encountered in hot melt adhesive packaging?
,Hot melt adhesive is non stick:
1、 Is hot melt adhesive tested before production. After long-term storage, the performance of hot melt adhesive is poor, the state is unstable, and it is prone to quality changes, which affects the performance of hot melt adhesive.
2、 The characteristics of hot melt adhesive. Due to insufficient permeability, it can affect the adhesion between books. The state and performance of hot melt adhesive are initially relatively stable, but over time, the page may fail and the adhesive interface may crack.
3、 Whether the production operation is correct. For example, the problem of paper falling off may not necessarily be a performance issue of hot melt adhesive. Before binding, it is necessary to check whether the hot melt adhesive can penetrate the surface of the book or magazine well. If the penetration is not good, it will affect the binding of books and publications. When folding and pressing after gluing, sufficient pressure and pressing time are required, otherwise it will also affect the performance of the hot melt adhesive.
2.Hot melt adhesive particles cannot produce glue:
1、 Has the hot melt adhesive particle been heated for a certain period of time before use? If used once a day, the hot melt adhesive should be preheated in the glue pot for 2 hours.
2、 Although hot melt adhesive particles are easy to use and maintain, they are also very durable. Usually, the shelf life of hot melt adhesive particles is 2 years, so it should be checked whether the hot melt adhesive has exceeded its service life.
The role and key elements of bookbinding adhesive in binding are the key to the quality of bookbinding! Hot melt adhesive becomes brittle when cooled, the back adhesive layer is not smooth, and insufficient penetration of the adhesive liquid leads to non stick properties. These are the issues that most books and publications face when […]
Direct answer: The impact is significant. For every 10 ℃ decrease in workshop temperature,hot melt adhesiveThe actual opening time has been reduced by about 30-40%; When the relative humidity exceeds 75%, the moisture content of the paper increases, and the wetting and penetration of the adhesive will deteriorate. The performance of the same batch of […]
What is the reason why EVA hot melt adhesive does not stick? Some time ago, a customer asked us why we couldn’t stick books firmly when bonding. Through this small case, we will answer the question: What is the reason why hot melt adhesive does not stick? When bonding books, if EVA hot melt adhesive […]
EVA hot melt adhesive is different from regular cold melt adhesive. According to its characteristics, the following points must be mastered and noted during use: 1、 Understand and master the models and technical performance (including technical parameters) of each EVA hot melt adhesive. Different types of hot melt adhesives have different opening and curing times. […]
