Structural adhesive refers to an adhesive that has high strength(compressive strength>65MPa,tensile strength(steel-to-steel)>30MPa,shear strength>18MPa),can withstand significant loads,and exhibits resistance to aging,fatigue,and corrosion.It maintains stable performance within the expected service life and is suitable for bonding structural components that require high strength.
Advantages and Applications of Structural Adhesives
Structural adhesives offer high strength,resistance to peel,impact resistance,and ease of application.They are used for bonding similar or dissimilar materials such as metal,ceramics,plastics,rubber,and wood.They can partially replace traditional joining methods like welding,riveting,and bolted connections.The stress distribution on the bonding surface is uniform,and there is no thermal impact or deformation on the parts.
In engineering,structural adhesives are widely used for reinforcement,anchoring,bonding,and repair of components.They are used for bonding steel,carbon fiber,fiber reinforcement,crack reinforcement,sealing,hole repair,dowel insertion,surface protection,concrete bonding,and more.
Advantages of Structural Adhesives
Uniform stress distribution and high material selection flexibility:
When using structural adhesives,stress can be evenly dispersed across the entire bonding surface,eliminating stress concentration issues caused by traditional methods such as spot welding,riveting,and bolted fastening.This allows for the use of lighter and thinner materials without compromising the strength of the components.It also enables effective bonding of dissimilar materials,improving overall performance.Different materials can be laminated using structural adhesives,combining the strength and properties of each material.The flexibility of structural adhesives addresses the issue of inconsistent thermal expansion coefficients between different materials,such as bonding aluminum and glass.Structural adhesives can also act as isolation layers to reduce or eliminate electrochemical corrosion between different metals.
Reduced surface defects and cost-saving on finishing:
Components assembled using structural adhesives can maintain their integrity and eliminate surface defects caused by mechanical connections or welding.Structural adhesives improve process design flexibility and reduce finishing work.They provide optimal fatigue performance,allowing components to withstand repeated tensile and recovery stresses.The excellent toughness of adhesives ensures up to 20 times higher fatigue resistance compared to welded or riveted components.The overall continuous connection formed by adhesive bonding ensures effective bonding and sealing in the working environment.
Cost-saving,environmentally friendly,and efficient:
Choosing structural adhesives reduces costs and simplifies production processes.Adhesive bonding reduces requirements on base materials,reduces weight,and eliminates processes like drilling,welding,screw fixation,and similar techniques,ultimately reducing costs while improving production efficiency.Minimal training is required for operation,and the use of structural adhesives does not result in harmful solvent emissions when used with primed or coated materials.Compared to traditional joining methods,structural adhesives exhibit excellent advantages in terms of cost,production efficiency,lightweighting,and performance.In most manufacturing applications,structural adhesives provide higher strength and longer lifespan for components.
Major Types of Structural Adhesives
High-performance Silicone Structural Adhesives:
High-performance silicone structural adhesives are one-component,neutral-curing adhesives specifically designed for structural bonding and assembly in building facades.They can be easily extruded and cure into excellent and durable high-modulus,high-elasticity silicone rubber,even under a wide range of temperature conditions.
Neutral Transparent Silicone Structural Adhesives:
This is a one-component,neutral-curing adhesive designed for structural bonding and assembly of glass structures in building facades.It can be easily extruded and cures into excellent and durable high-modulus,high-elasticity silicone rubbe
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