During the packaging process, release film plays a crucial role. It not only protects components from external pollution, but also ensures precise positioning and stability of packaging materials. Release films are commonly used in the lamination and curing processes of solar cell packaging, providing reliable support for the packaging process through their excellent anti adhesion and heat resistance properties. It can effectively avoid adhesion and damage to the surface of the module, thereby improving the overall performance of the photovoltaic module. The use of this film material not only helps improve production efficiency, but also significantly reduces waste rates, providing an ideal solution for the photovoltaic manufacturing industry.

The main function of release film in solar cell module packaging is to serve as an isolation medium, preventing packaging materials such as EVA film from sticking to hot pressing equipment or other layer materials. Its high temperature resistance and high transparency enable it to maintain good morphological stability in the high-temperature environment of the laminating machine. The anti sticking properties of the release film enable the component to smoothly separate from the packaging material after curing and cooling, avoiding surface defects and process instability caused by adhesion. At the same time, the uniformity and smooth surface of the release film can ensure the integrity of the encapsulation layer, reduce the generation of bubbles, and thus improve the optical and mechanical performance of photovoltaic modules.

The use of release film in the packaging process of photovoltaic modules brings several significant advantages. Firstly, release film can improve production efficiency. Its excellent anti adhesion makes it difficult for the packaging material to adhere to the equipment after contact, thereby reducing downtime and equipment cleaning frequency, and improving the overall production rhythm. Secondly, the high temperature resistance of the release film ensures that it can withstand temperatures of up to 200 degrees Celsius during the lamination process, which prevents deformation or decomposition during the packaging process and ensures the quality of the components.

In addition, release film can also reduce material loss in packaging. In traditional packaging, without the protection of release film, the packaging material may be damaged due to direct contact with the equipment, resulting in material waste. The use of release film can effectively prevent this problem from occurring and reduce production costs. In addition, the transparency of the release film has almost no effect on the optical performance of solar cells, which helps to maximize the transmittance of light and thus improve the efficiency of solar cells.

The commonly used release film materials in the packaging process of solar cells are PET, PE , and PP. Among them, PET release film is the most common in photovoltaic packaging due to its excellent mechanical strength, heat resistance, and transparency. PET release film can maintain stability in high temperature and high pressure environments, and has good chemical resistance, which prevents degradation or deterioration in long-term contact with EVA film.

PE and PP release films have also been widely used in certain specific photovoltaic applications due to their lower cost and good anti sticking effect. Compared to PET, the heat resistance of PE and PP release films is slightly inferior, making them more suitable for medium and low temperature packaging processes. According to different packaging process requirements, suitable release film materials can be selected to ensure their stable performance in high temperature, pressure, and chemical environments, thereby achieving the best packaging effect.

In addition, the development of functional release films is also continuously advancing, such as film materials with higher transparency, better anti adhesion, and UV resistance, which will further enhance the packaging effect of photovoltaic modules. Intelligent production processes and higher precision coating technologies will gradually be applied in the manufacturing of release films to ensure their consistency and stability during the production process.