How Does the Performance of Adhesives Affect the Safety and Reliability of Automobiles?（1）
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Bonding Strength
Secure Connection of Key Components: Many key components of an automobile, such as the chassis, body structural parts, and engine cylinders, are connected by adhesives. Sufficient bonding strength ensures that these components will not loosen or fall off due to various external forces during the vehicle's operation, such as the forces generated during acceleration, braking, and cornering, as well as the impact forces from road bumps. This guarantees the stability of the overall vehicle structure and provides a fundamental guarantee for driving safety.
Ensurance of Anti-fatigue Performance: During the service life of an automobile, the connection points of components will continuously bear alternating stresses. An adhesive with good anti-fatigue performance can maintain the bonding effect under long-term stress, avoiding the occurrence of fatigue cracks and debonding. This ensures that the connections of key parts remain reliable even after the automobile has been used for a long time, reducing potential safety hazards caused by connection failures.
Temperature Resistance Performance
Adaptability to Extreme Environments: Automobiles may be driven in various environmental temperatures, ranging from the cold polar regions to the hot deserts. The temperature resistance performance of adhesives ensures that it will not become brittle and lose its adhesiveness in low-temperature environments, nor will it soften, flow, or decompose in high-temperature environments. For example, the temperature in the engine compartment is relatively high. If the adhesive used for bonding engine components has poor temperature resistance, it may fail at high temperatures, causing the components to loosen, affecting the normal operation of the engine and even leading to safety accidents.
Requirements for Special Components: Adhesives for special components such as brake shoe adhesives need to withstand higher temperatures. During the braking process, the brake shoes will generate a large amount of heat due to friction. If the adhesive cannot withstand the short-term high temperature of 250 - 300°C, it may lead to the failure of the bonding between the brake shoes and other components, reducing the braking performance and seriously threatening driving safety.
