Industrial adhesives are familiar and frequently used. They come in a wide variety of types with varying properties. Choosing an adhesive requires comprehensive consideration to achieve the desired bonding effect!

Selecting adhesives based on the physical properties of the materials being bonded

1. For bonding brittle or rigid materials (such as ceramics, glass, cement, and stone), it is recommended to choose thermosetting resin adhesives with high strength, high hardness, and resistance to deformation, such as epoxy resin adhesives, phenolic resin adhesives, and unsaturated resin adhesives.

2. For bonding elastic or tough materials (such as rubber, leather, plastic, and film), choose adhesives with good elasticity and a certain degree of toughness, such as neoprene, polyurethane adhesives, modified silane adhesives, and rubber-based adhesives.

3. For bonding porous materials (such as foam plastics, sponges, and fabrics), choose adhesives with higher viscosities, such as epoxy resin adhesives, polyurethane adhesives, modified silane adhesives, hot melt adhesives, polyvinyl acetate adhesives, and rubber-based adhesives.

4. Select the adhesive based on the substrate’s expansion coefficient. At room temperature, the expansion coefficients of most substrates are generally similar, so detailed consideration is not necessary. However, at high or low temperatures or when bonding over a large area, the similar expansion coefficients of the adhesive and substrate must be considered.

Select the adhesive based on the chemical properties of the substrates.

1. For bonding polar materials (such as steel, aluminum, titanium, magnesium, and ceramics), it is recommended to choose a highly polar adhesive such as epoxy resin, polyurethane, phenolic resin, acrylic, or inorganic adhesive.

2. For bonding weakly polar and non-polar materials (such as paraffin wax, asphalt, polyethylene, polypropylene, polystyrene, and ABS), choose an acrylic adhesive, unsaturated polyester adhesive, or a solvent that can dissolve the bonded material.

Select adhesives based on the product’s operating environment.

1. Choose different adhesives based on the product’s operating temperature. For room temperature applications, most adhesives, such as hot melt adhesives and instant glue, are suitable. Epoxy resins are suitable for use below 120°C; rubber adhesives are suitable for use below 80°C; silicone adhesives are suitable for use below 200°C; and inorganic adhesives are suitable for use below 2000°C.

2. Choose adhesives based on the product’s natural operating environment. For example, for outdoor environments subject to heat, cold, humidity, and UV exposure, weather resistance must be considered. Silicone adhesives, epoxy adhesives, polyurethane adhesives, and modified silane adhesives are suitable.

3. Choose adhesives based on the product’s chemical environment, such as exposure to acids, alkalis, salts, oils, and gases.

4. Choose adhesives based on the product’s physical environment, such as the forces, vibrations, and pressures at the bonding site.

Select adhesives based on the process.

1. For infusion processes, solvent-free, low-viscosity adhesives are generally chosen.

2. For sealing or large-area bonding, processes such as scraping or dispensing are often used, and paste-like adhesives are often chosen.

3. For bonding, sealing, and repairing delicate surfaces, liquid adhesives are often chosen.

There are numerous types of industrial adhesives, each with different properties. For example, adhesives with specialized functions are selected for bonding, sealing, electrical conductivity, insulation, flame retardancy, heat insulation, thermal conductivity, and leak prevention. The effects achieved vary depending on the application.