How to choose the right hot melt adhesive?

2026-07-20 16:07:57

Hot melt adhesives are widely used in a variety of fields, including packaging, product assembly, book binding, woodworking, and pressure-sensitive tapes and labels. Compared with water-based or solvent-based adhesives, it can provide excellent adhesion performance and excellent processing flexibility. It is the 1 kind of plastic adhesive, in a certain temperature range of its physical state with temperature change, but the chemical properties of the same, it is non-toxic and tasteless, very environmentally friendly. Therefore, it is one of the more commonly used 1 adhesives, how to choose the right hot melt adhesive? The following aspects are for reference only: 1. Color of hot melt adhesive If the adhesive itself has no special requirements for color, then you can use yellow hot melt adhesive, in general, the viscosity of yellow hot melt adhesive is better than white. 2. Surface treatment of the bonded object Hot melt adhesive on the surface of the adhesive is not as strict as other adhesives, but the dust and oil on the surface of the adhesive should also be properly treated, so as to make the hot melt adhesive play a better bonding role. 3. Bonding time Fast bonding is a major feature of hot melt adhesives. The bonding time of hot melt adhesives is generally only about 15 seconds. With the wide application of modern production methods, that is, assembly line operations, the requirements for bonding time of hot melt adhesives are higher, that is, the shorter the better. For example, book binding and speaker manufacturing require bonding time of hot melt adhesives to be about 5 seconds. 4. Sensitivity of hot melt adhesive to temperature When the temperature reaches a certain level, the hot melt adhesive begins to soften. Below a certain temperature, the hot melt adhesive will become brittle. Therefore, the choice of hot melt adhesive must fully consider the temperature change of the product environment. 5. Viscosity The viscosity of the hot melt adhesive is divided into early viscosity and late viscosity. Only when the early viscosity and late viscosity are consistent can the hot melt adhesive and the adherend remain stable. Of course, in the production process of hot melt adhesive, it should be ensured that it has oxygen resistance, halogen resistance, acid and alkali resistance and plasticity, etc. The adhesive material is different, and the viscosity of hot melt adhesive is also different. Therefore, different hot melt adhesives should be selected according to different materials.