An adhesive not only needs to stick firmly but also maintain long - lasting stickiness. No matter how good the adhesive effect is, if it is not durable, it will fall off after a while or the stickiness will decrease due to certain reasons. Therefore, sometimes we need to find ways to ensure the long - term stickiness. Research and experience have shown that adhesives can bond objects through intermolecular attraction. The adhesive force that occurs at the interface is composed of a combination of secondary valence forces (physical forces, electrostatic forces), primary valence forces (chemical forces), and mechanical forces. Among them, secondary valence forces are the main forces generating the adhesive force. The realization of this adhesive force can be considered in two stages: The first stage is that the flowing adhesive molecules diffuse towards the surface of the object to be bonded and gradually approach it with the help of Brownian motion. The fluidity of the adhesive liquid during gluing (lower viscosity) and the application of curing pressure are conducive to this intermolecular contact and approach. The second stage is the generation of intermolecular adsorption. When the distance between the adhesive molecules and the surface molecules of the object to be bonded approaches a certain value, the secondary valence forces begin to take effect and increase as the distance between the molecules of the adhesive and the surface decreases. These two processes cannot be completely separated and occur continuously before the adhesive cures. Thus, promoting sufficient contact between the adhesive and the surface of the object to be bonded and the approach of the molecules of the two is the key to obtaining adhesive force. Therefore, for the same adhesive, if the viscosity of the adhesive liquid itself is relatively high, during construction, measures should be taken to thin it, such as increasing the temperature to promote Brownian motion, applying pressure during curing, and extending the curing time (especially for room - temperature curing adhesives). The smoothness, cleanliness, and dryness of the surface of the object to be bonded are all conditions for obtaining the best adhesive force. To sum up, the following points should be noted during construction:

1. The procedure of the bonding process: Surface treatment. Depending on the nature of the object to be bonded and different situations, surface treatment should be carried out. Strictly speaking, it can be divided into general methods, chemical methods, and physical methods. In the decoration industry, simple treatment is mainly carried out on the object to be bonded, such as handling issues like dust, oil stains, rough surfaces, and moisture to ensure that the bonded surface is clean, dry, and free of oil stains.
2. Gluing. The surface to be bonded should be evenly coated with glue to ensure infiltration and avoid the generation of bubbles as much as possible. The existence of air holes can greatly reduce the bonding strength and lead to debonding. Attention should be paid to aligning the position at one time without misalignment. Pressure can be applied to expel air and make them come into close contact.
3. Curing. Curing is the process by which the adhesive turns the adhesive layer into a solid through chemical and physical actions. Curing is the last step in obtaining bonding performance and has a great impact on the bonding strength.

During the curing process, temperature, pressure, and time are the three important parameters of the curing process. The change of each parameter has a direct impact on the bonding strength (each adhesive has a specific curing temperature and time). Applying a certain pressure during curing is necessary for all adhesives because pressurization is conducive to the diffusion and penetration of the adhesive, close contact with the object to be bonded, and helps to expel gases and moisture, avoiding the generation of bubbles and pores, making the adhesive layer uniform, and fixing the position of the object to be bonded. Whether the curing of the adhesive layer is completed through chemical reactions or physical actions, it takes a certain amount of time. To achieve complete curing and obtain the maximum bonding strength, sufficient curing time must be ensured (this is what is usually referred to as allowing a certain amount of time for the adhesive to reach its final adhesive force).