What Is an Adhesive Primer?

The binder is a guarantee of the bonding strength between the abrasive and the substrate. With the development of the chemical industry, various new types of adhesives have entered the field of coated abrasives, which has improved the performance of coated abrasives and promoted the development of coated abrasives industry. In addition to rubber, the binder also includes auxiliary components such as solvents, curing agents, toughening agents, preservatives, colorants, and defoamers. In addition to the most commonly used animal glues, adhesives include synthetic resins, rubber, and paint.

Substances added to the powder to increase the strength of the compact or to prevent segregation of the powder, which can be removed before or during the sintering process. The binder is a guarantee of the bonding strength between the abrasive and the substrate. With the development of the chemical industry, various new types of adhesives have entered the field of coated abrasives, which has improved the performance of coated abrasives and promoted the development of coated abrasives industry. In addition to rubber, the binder also includes solvents,

There are three theoretical explanations for the adhesion formed by the adhesive and the adherend: adsorption theory and adsorption theory, electrostatic theory and electrostatic theory, and diffusion theory and diffusion theory. ^[1]

Humans have begun to stick items with dry resin as far back as ancient times. Ancient china and

With the advancement of modern technology, the instant adhesive has been further improved. The improved adhesive can be used to stop bleeding of some fine blood vessels, organs and skin, promote early healing of wounds, and prevent pathogen infection.

The most noticeable currently is the adhesive used by the space shuttle. The front and lower heat-resistant tiles of the aircraft are adhered to the aircraft with a silicone adhesive called "RTV room temperature sulfur type". This kind of adhesive cured at room temperature can withstand temperatures below minus 100 degrees and minus 1650 degrees, and can maintain the elasticity of impact resistance even at extremely low or high temperatures, and is therefore widely used in the universe, Aerospace and electronics industries.

1.Select according to the chemical properties of the material being bonded

Some materials to be bonded contain some polar groups, so it is necessary to choose an adhesive that can chemically react with it, which can improve the strength of the joint.

2.Select according to the physical properties of the material being bonded

It includes the surface tension of the material being bonded, the solubility of the solvent in the adhesive, and the surface characteristics of the material being bonded, such as rigidity, elasticity, and toughness.

3. Choose according to the special requirements of the adhesive head

Because there are various kinds of bonding materials, and the use occasions and conditions are also ever-changing, you must choose the appropriate adhesive according to the specific requirements of the bonding joint, which includes tensile, bending, peeling, and impact resistance Equivalent mechanical strength and high temperature resistance, water resistance, oil resistance, low temperature resistance and other special functions such as optical and electromagnetic.

4. Choose according to the conditions of curing

The curing of the adhesive is affected by temperature, pressure, time, air and other conditions. Some adhesives need to be cured by heating, some need to be cured by pressure, and some need to be isolated from the air. Adhesives for the respective curing conditions.