Brief introduction of structural adhesives
Structural adhesive refers to adhesives with high strength (compression strength>65MPa, steel-steel tensile bonding strength>30MPa, shear strength>18MPa), the ability to withstand large loads, and resistance to aging, fatigue, and corrosion. It has stable performance within its expected service life and is suitable for bonding structural parts that withstand strong forces.
Advantages of structural adhesives
Structural adhesive has high strength, peeling resistance, impact resistance, and simple construction process. It is used for bonding the same materials or different materials such as metals, ceramics, plastics, rubber, and wood. It can partially replace traditional connection forms such as welding, riveting, and bolting. The stress distribution on the bonding surface is uniform, and there is no thermal impact or deformation on the parts.
Structural adhesives are widely used in engineering, mainly for the reinforcement, anchoring, bonding, and repair of components; such as bonding steel, bonding carbon fiber, planting rebar, crack reinforcement and sealing, hole repair, spike pasting, surface protection, concrete bonding, etc.
Performance advantages of structural adhesives
- 1. Uniform stress distribution and high freedom of material selection
First, when using structural adhesive, stress can be evenly dispersed over the entire bonding surface, eliminating the stress concentration problem caused by traditional spot welding, riveting, bolting and other methods. Therefore, lighter and thinner materials can be used without losing component strength. Secondly, it can effectively bond dissimilar materials to improve overall performance. Then, different materials can be bonded using structural adhesive to form laminated materials, which can perfectly combine the strength and overall performance of each material. At the same time, the toughness of structural adhesive can effectively solve the problem of inconsistent thermal expansion coefficients between different materials in the application, such as the bonding application of aluminum and glass. Structural adhesive can also be used as an isolation layer to reduce or even eliminate the problem of electrochemical corrosion between different metals.
- 2. Reduce surface defects and save finishing costs
Components assembled with structural adhesives can maintain component integrity and eliminate surface defects caused by mechanical connection points and welding. Using structural adhesive bonding can greatly improve process design flexibility and reduce finishing work. Structural adhesives can also provide optimal fatigue performance. The excellent toughness of the adhesive allows components to be repeatedly stretched and recovered under repeated stress. The energy absorption of the adhesive ensures that the fatigue resistance of the bonded parts is up to 20 times that of welded or riveted parts. The overall continuous connection formed by the assembly parts through bonding can ensure effective bonding and sealing in the working environment.
- 3. Reduce costs, be environmentally friendly and efficient
Choosing structural adhesive bonding can reduce costs and simplify the production process. The bonding process can reduce the requirements for the substrate, reduce weight, and eliminate drilling, welding, screw fixing and similar processes, ultimately reducing costs while improving production efficiency. Only a small amount of training is required for operation, and no harmful solvent emissions are generated when using structural adhesives to bond primer-treated or coated materials. Compared with traditional connection methods, structural adhesives have shown outstanding advantages in cost, production efficiency, lightweight and performance. In most production applications, structural adhesives can provide components with higher strength and longer life.
Main types of structural adhesives
- 1. High performance silicone structural adhesive
High-performance silicone structural adhesive is a one-component, neutral curing, specially designed for structural bonding and assembly in building curtain walls. It can be easily extruded and used under a wide range of temperature conditions, and relies on moisture in the air to cure into an excellent, durable, high modulus, and high elastic silicone rubber.
- 2. Neutral transparent silicone structural adhesive
A one-component, neutral curing, specially designed for glass structure bonding assembly in building curtain walls. It can be easily extruded and used under a wide range of temperature conditions. It relies on moisture in the air to cure into an excellent, durable high modulus, high elastic silicone rubber. The product does not require a primer on glass and can produce excellent adhesion.
- 3. Building structural adhesive
Due to its excellent performance, building structural adhesives are widely used in construction and installation, decoration, sealing, structural adhesives and other fields.
Post time: 2024-08-30 10:22:17