In order to improve the reliability and stability of electronic components, people usually pour a layer of electronic sealing adhesive inside them, because electronic sealing adhesive has certain electrical insulation performance and thermal conductivity. After sealing, it can effectively improve the insulation ability between internal components and circuits, and also play a certain heat dissipation role, which can effectively ensure the stability of electronic components. There are two main types of sealing adhesive commonly used on electronic components, namely: silicone sealing adhesive and epoxy sealing adhesive. The sealing adhesive of the two materials is applied in different situations based on their own advantages and disadvantages.
1. The sealing adhesive made of epoxy resin material has good modification ability and can adjust its thermal conductivity according to the different sealing products. It also has excellent electrical insulation ability. However, it has poor resistance to cold and hot changes and is prone to small cracks during the process of cold and hot alternation, which affects the moisture-proof ability of electronic components; The hardness of solidified colloids is also very high, which can easily strain electronic components. If the hardness is too high, it is difficult to have good impact resistance. It is generally used in electronic components that do not have significant requirements for environmental mechanics. For example, on electronic components such as capacitors, transformers, and electronic transformers.
2. Organic silicon sealing adhesive has better modification ability and electrical insulation ability than epoxy resin, and also has excellent resistance to cold and hot impacts. It can withstand cold and hot impacts from -60 ℃ to 200 ℃ without cracking and maintaining elasticity, improving the moisture-proof performance of electronic components. As it becomes an elastic body after curing, it can also have good impact resistance when sealed inside electronic components, and has excellent resistance to outdoor ultraviolet radiation and atmospheric aging. Electronic components that can be widely used in various harsh environments. For example, outdoor transformers, ignition coils with high temperature resistance requirements, and electronic devices in coastal areas.