With the improvement of people's living standards, lighting fixtures have become an indispensable part of home and commercial spaces. Most lighting products use silicone adhesives during production and assembly, whose core function is to bond, fix, and seal lighting components. The quality and lifespan of lighting fixtures largely depend on the choice of adhesive. Today, we will analyze in detail the key performance requirements of silicone adhesives used in lighting products.
I. Excellent Yellowing Resistance
Yellowing resistance is one of the core performance characteristics of silicone adhesives for lighting fixtures. Lighting fixtures continuously release heat during long-term use. If the adhesive's high-temperature resistance is insufficient, it will age under prolonged high-temperature environments, causing the cured adhesive to gradually yellow and become cloudy. This not only affects the overall aesthetics of the lighting fixture but also blocks light, reducing brightness and concentration, directly impacting the lighting effect and shortening the actual lifespan of the fixture. Therefore, silicone adhesives specifically designed for lighting fixtures must possess the characteristics of long-term high-temperature resistance and resistance to yellowing, ensuring that the adhesive remains transparent or its original color throughout the entire lifespan of the lighting fixture.
II. Non-corrosiveness
Lighting fixture components are mostly made of plastics, metals, etc., and are often in a sealed state after bonding and assembly. During the complete curing process of silicone adhesives, a small amount of small molecules are released. If these small molecules are corrosive, the liquid formed after long-term coagulation will adhere to the inner wall of the lighting fixture housing, the surface of the lamp holder, and other components, leading to damage such as cracking, peeling, and discoloration. In severe cases, it can affect the electrical performance of the lighting fixture and even cause safety hazards. Therefore, choosing a silicone adhesive that is non-corrosive and non-irritating to various materials (plastics, metals, etc.) is crucial to ensuring the integrity of lighting fixture components and their safety in use.
III. Sufficient Torque Force
Torque force is an indispensable key performance characteristic for lighting fixtures such as bulbs that require rotational installation. Torque force refers to the specific moment that causes an object to rotate. The specific testing method is as follows: After the bulb's socket and lampshade are bonded to each other with silicone adhesive and fully cured, the luminaire and its matching clamp are mounted on a torque sensor. The operator, wearing protective gloves, holds the lampshade and rotates it. The force applied when the lampshade becomes loose is the torque force of the adhesive. Since bulbs require twisting and fixing during installation, insufficient torque force from the adhesive can easily lead to the lampshade loosening and falling off during installation, affecting the installation stability and safety of the luminaire. Therefore, the torque force must meet the actual needs of luminaire installation and use.
It is important to note that different structures and applications of luminaires have different key performance requirements for silicone adhesives. TENSAN Silicone focuses on the research and development and production of electronic adhesives, and has been deeply involved in the lighting industry for many years. We have not only solved many difficult problems in the adhesive application process for lighting products, but also accumulated rich experience in customized adhesive solutions, capable of adapting to the production needs of various luminaires. We welcome inquiries and cooperation from users.
