The affinity of the hot melt adhesive to different bonded materials is different. In order to make the hot melt adhesive perform better "stickiness", the following factors should be carefully considered in selecting the hot melt adhesive.

(1) Color

Due to the different colors of the adhesive, the color requirements of the hot melt adhesive should be different. If there is no special requirement on the color of the adherend itself, it is recommended to use yellow hot melt adhesive. In general, the yellow hot melt adhesive is more viscous than white.

(2) Surface treatment of adherends

The surface treatment of the hot melt adhesive to the adhered material is not as strict as other adhesives, but the dust and oil stain on the surface of the adhered material should also be properly treated so that the hot melt adhesive can better exert the adhesive effect.

(3) Working hours

Fast job is a major feature of hot melt adhesives. The working time of hot melt adhesives is generally around 15 seconds. With the wide application of modern production methods, assembly lines, hot melt adhesives require shorter and shorter working time.

(4) Temperature resistance

Hot melt adhesives are sensitive 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, so the choice of hot-melt adhesive must fully consider the change of the ambient temperature.

(5) Viscosity

The tackiness of hot melt adhesives is early tack and late tack. Only the early stickiness and the late stickiness can make the hot melt adhesive and the adherend stable. In the production process of hot melt adhesives, it should be ensured that it has anti-oxidation, anti-halogen, anti-acidity and plasticity.