With the continuous deepening of industrialization, electronic equipment is rapidly developing in the direction of miniaturization, integration and precision. This trend of precision makes the equipment more fragile, and even a small fault may seriously affect its normal operation. At the same time, the application scenarios of electronic equipment are also constantly expanding. From Gobi, desert to ocean, electronic equipment is everywhere. In these extreme natural environments, how to effectively resist harsh conditions such as ultraviolet radiation, high temperature exposure, acid rain erosion, etc. has become an urgent problem to be solved.
Adhesives, known as "industrial MSG", not only have good bonding properties, but also have certain strength and hardness after curing, so they are also very effective protective materials. Potting glue, as an adhesive with flow properties, its core function is to effectively fill the gaps between precision components, tightly wrap the components, and form a strong protective barrier. However, if the wrong potting glue is selected, its effect will be greatly reduced.
Common problems with electronic potting glue are as follows:
1. Brittleness: The colloid gradually loses its elasticity and cracks under long-term high temperature and high humidity.
2. Debonding: The colloid structure gradually detaches from the surface of the junction box, resulting in bonding failure.
3. Yellowing: A common aging phenomenon that affects appearance and performance.
4. Degradation of insulation performance: Causes electrical failures and seriously affects the safety of the system.
Good glue is the key:
Excellent silicone potting glue is the key to solving the problem!
With its natural weather resistance and durability, silicone potting glue can effectively protect electronic components for a long time, thereby extending their service life. Sibao 4808 electronic thermal conductive potting glue not only has the basic functions of adhesives, but also has excellent weather resistance and aging resistance, mainly including the following aspects:
Insulation and thermal conductivity flame retardant performance: effectively protect the inside of the junction box to prevent accidents such as short circuit and burning.Waterproof and moisture-proof: prevent water vapor from entering the inside of the junction box to prevent problems such as electrical short circuit. Excellent bonding: has good bonding performance for materials such as PPO and PVDF.
In order to better evaluate the performance of potting glue, aging test is essential. In the industrial field, aging tests include: ultraviolet (UV) aging, hot and cold cycles, hot and cold shock, high temperature and high humidity aging (usually 85℃, 85%RH, i.e. double 85), and high accelerated temperature and humidity stress test (High Accelerated Stress Test, i.e. HAST), etc. Among them, double 85 and HAST are the two fastest and most effective aging test methods, which can quickly accelerate material aging through extreme environments of high humidity, heat and high pressure; predict the life and reliability of products in different environments, and provide a basis for product design and optimization.
Good or not, only testing can tell
Next, let's take a look at the performance of Silicon Power 4808 in the dual 85 and HAST tests.
1. Appearance changes: After the dual 85 1500h and HAST 48h tests, the sample surface did not turn yellow, and there was no surface damage or cracks. Being able to effectively resist the impact of external factors on its appearance under high temperature and high humidity conditions is crucial for the long-term operation of electronic systems.
2. Adhesion ability: After the double 85 1500h test and HAST 48h test, the adhesion ability of Silicon Bao 4808 is still good. It has excellent adhesion ability in extreme environments, which can effectively ensure the waterproof and moisture-proof effect of key components of the system and ensure that electronic components are protected for a long time.
3. Physical, mechanical and electrical properties: After double 85 and HAST aging tests, the physical, mechanical and electrical properties of Silicon Power 4808 remain at a high level. It has high toughness, elasticity and insulation performance. It can effectively resist the external environment in extreme environments and provide reliable protection for electronic components.
