What causes unevenness after potting compound curing? Does it affect performance?
2023-04-23
During the potting process, encapsulating adhesive exhibits fluidity and, after curing, develops a smooth surface with a sleek, thin film layer. However, some users have noticed that the surface of the cured encapsulating adhesive becomes uneven. What causes this phenomenon, and does it affect the performance of the encapsulating adhesive?
What causes unevenness after potting compound cures?
1. The uneven surface of potting compound after curing is related to the ambient temperature during application. If the ambient temperature is too high during construction, the adhesive may begin to cure before it has fully flowed and leveled out on its own, resulting in an uneven cured surface.
2. If residual debris remains in the mixing cup or blender and the base surface is not cleaned promptly, unevenness will occur on the substrate surface after the adhesive is mixed and poured onto it, and then cured.
To prevent uneven surfaces after curing, in addition to paying attention to the ambient temperature during application, you must also perform regular maintenance on your application tools and rinse them thoroughly immediately after use. The surface of the substrate must be free of oil and dust.
Does unevenness after potting compound curing significantly affect performance?
After the potting compound has cured, uneven thickness in the cured material can significantly affect its performance. Areas where the compound is thin tend to have poorer waterproof and moisture‑resistant properties, and other performance characteristics will also decline accordingly. In areas where the compound is slightly thicker, it becomes difficult to probe for components using a needle, making it challenging to locate faulty parts once a failure occurs.
After the adhesive cures, its uneven surface can lead to unstable electrical performance. Even when components are securely fastened with screws during operation, areas with thicker adhesive layers may still experience slight tilting, and prolonged use will increase the likelihood of electrical failures.
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