Hot melt adhesive (English name: Hot Glue or Hot melt Adhesive) is a plastic adhesive. Its physical state changes with temperature within a certain temperature range. It is solid at low temperature and fluid at high temperature. The chemical properties remain unchanged, it is non-toxic and tasteless, and it is an environmentally friendly chemical product. Because the product itself is solid, it is easy to package, transport, store, solvent-free, pollution-free, non-toxic; as well as simple production process, high added value, high bonding strength, fast speed and other advantages.
At present, the rosin resin processed by the rosin industry is mainly used in the hot melt adhesive industry, so we should study and study it in particular. Due to its environmental protection characteristics and with the economic development of various countries, people are paying more and more attention to the potential harm caused by various daily necessities to the human body, so the application range of hot melt adhesive products is becoming wider and wider, especially in Europe, the United States, and Japan in Asia. And Korea, solvent-based adhesive products are increasingly being replaced by hot melt adhesive products. The types of hot melt adhesives are also diverse, but they remain the same. The overall formula is composed of basic resins, tackifiers, viscosity modifiers and antioxidants. The main types are polyolefin hot melt adhesives, ethylene and its copolymer (EVA) hot melt adhesives, polyester hot melt adhesives, polyester (PET), polyamide hot melt adhesives, environmentally friendly hot melt adhesives, pressure Sensitive hot melt adhesive and water-based hot melt adhesive, etc. Among them, EVA-type hot-melt adhesives, environmentally friendly hot-melt adhesives (composite of wood and paper, etc.), pressure-sensitive hot-melt adhesives and water-based hot-melt adhesives will use a large number of rosin resins with various properties. Among them, the tackifier is used, and the performance and cost of the hot melt adhesive are adjusted by selecting different types of rosin resin, changing the proportion and compounding of different tackifying resins.