Base resin of hot melt adhesive.

Because hot melt adhesive typically have high melt viscosity and poor wetting of the bonding material, it is often necessary to apply pressure to the adhesive to increase bond strength. In addition, hot melt adhesives require special equipment, such as hot melt glue guns for coating machines, and their application range is limited to a certain extent. The physical state of hot melt adhesive changes with the change of temperature within a certain temperature range, but the chemical properties remain unchanged, non-toxic and tasteless, and belong to environmental protection chemical products.

 

Its function is to increase the fluidity of the colloid, adjust the coagulation speed, and achieve the purpose of fast and firm bonding. Otherwise, the viscosity of the hot melt adhesive is too high, it cannot or does not flow easily, and it is difficult to penetrate into the book post, so it cannot be firmly bonded. By adding a viscosity modifier with a low softening point, good penetration and adhesion can be achieved. Synthetic wax (polyethylene or polypropylene), artificial wax, etc.