What Is The Principle Of Silicone Glue?

Glue, as a common tool, has always been around us. Supermarkets and markets have its shadow, and its types are also diverse. As a special glue, special glue for high temperature resistant silicone can bond silicone, and it is resistant to high temperature and reliable in quality. It has many functions and fast bonding efficiency. So, what is the principle of this special glue?

1. Mechanical theory

The special glue for silica gel needs to penetrate into the gaps on the surface of the adherend, and the air adsorbed on the interface needs to be excluded to make the glue bond. Mechanical bonding is an important factor in bonding porous adherends such as foamed plastics. Sanding of the glue surface results in better adhesion due to mechanical inlays; creates a clean surface; creates a reactive surface; increases surface area. Because grinding does make the surface rougher, it can be considered that the physical and chemical properties of the surface layer have changed, thereby improving the bond strength.

2. Adsorption theory

The theory is that bonding is caused by molecular contact and interfacial force generation between two materials. The main source of adhesive force is the intermolecular force including hydrogen bond force and van der Waals force. The process of continuous contact between the adhesive and the adherend is called wetting. To make the adhesive wet the solid surface, the surface tension of the adhesive should be less than the critical surface tension of the solid. The adhesive is immersed in the depressions and voids on the solid surface to form a good wetting. wet).

3. Diffusion theory

Diffusion theory believes that bonding is produced by molecular diffusion on the interface between the special glue for silica gel and the adherend. When both the adhesive and the adherend are long-chain macromolecular polymers that can move, the diffusion theory is basically applicable. Solvent bonding and thermal welding of thermoplastics can be considered as a result of molecular diffusion.

The above is the use principle of high temperature resistant silicone special glue. Due to the mechanical theory, the glue penetrates into the surface of the object. The principle of adsorption is that the suction generated when two materials are in contact can cause the object to have a strong bond. The above three are the main suction. The principle, only when you understand the principle of glue, can you use it better.