The following factors should be carefully considered when selecting hot melt adhesive films:

1. Color

Due to the different colors of the adherends, the color requirements for the hot melt adhesive film should be different. If the adherend itself has no special requirements for color, it is recommended to use yellow hot-melt adhesive film. Generally speaking, yellow hot-melt adhesive film is more sticky than white.

2. Surface treatment of the attached object

The surface treatment of the hot melt adhesive film is not as strict as that of other adhesives, but the dust and oil on the surface of the adhered object should also be properly treated so that the hot melt adhesive film can play a better role in bonding.

3. Working time

Fast operation is a major feature of hot melt adhesive films. The working time of hot-melt adhesive film is generally about 15 seconds. With the wide application of modern production methods - assembly line, the operating time of hot-melt adhesive film is getting shorter and shorter, such as book binding and speaker manufacturing. The operation time is required to reach about 5 seconds.

4. Anti-temperature

Hot melt adhesive films are more sensitive to temperature. When the temperature reaches a certain level, the hot-melt adhesive film begins to soften. Below a certain temperature, the hot-melt adhesive film will become brittle. Therefore, the selection of the hot-melt adhesive film must fully consider the temperature change of the environment where the product is located.

5. Stickiness

The viscosity of hot melt adhesive film is divided into early viscosity and late viscosity. Only when the early tack and late tack are consistent, can the hot melt adhesive film and the adherend remain stable. In the production process of hot melt adhesive film, it should be ensured that it has oxidation resistance, halogen resistance, acid and alkali resistance and plasticity. Depending on the material to be attached, the viscosity of the hot melt adhesive film is also different. Therefore, different hot melt adhesive films should be selected according to different materials.