Japan's Kuraray Co., Ltd. has started testing a new type of solar cell packaging film that promises to enhance the performance and longevity of solar modules. This innovative thin film is made from a thermoplastic resin known as polyvinyl butyral (PVB), which can be formed at high temperatures. Developed in collaboration with the Japan Institute of Industrial Technology, the material offers improved durability, strength, and cost-efficiency while also contributing to weight reduction.
One of the key advantages of this new packaging solution is its superior sealing properties. Unlike traditional methods, it eliminates the need for additional sealants at the end of the production process, which helps prevent moisture ingress and reduces the risk of internal damage. This not only simplifies the manufacturing process but also minimizes the stress on the glass components, reducing bending and maintaining overall structural integrity without requiring extra support frames.
The film also enhances long-term reliability by resisting degradation over time, offering better performance than conventional materials. In recent years, the issue of Pattern Induced Degradation (PID)—a phenomenon where solar module output decreases due to environmental factors like temperature and humidity—has become a major concern. This new technology addresses these challenges effectively, ensuring more stable and consistent energy output over the lifespan of the module.
With growing demand for solar modules that are more cost-effective, lighter, and more reliable, especially in harsh environments, Kuraray’s new PVB film represents a significant advancement in solar technology. The encapsulant plays a crucial role in protecting internal components such as solar cells, electrodes, and wiring, safeguarding them from moisture, mechanical stress, and aging. By improving the encapsulation process, this innovation supports the industry's push toward more efficient and durable photovoltaic systems.
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