How To Judge The Quality Of Solar Eva Film?

Judging the quality of solar eva film needs to be considered from a number of aspects, including its physical properties, chemical properties and production process. Here are some ways to judge the quality of solar eva film:

1, VA content detection: EVA film in the VA (ethylene vinyl acetate copolymer) content has a significant impact on its performance. lower VA content, the film's heat resistance is better, but the polarity and adhesion is poor; and VA content is higher, the film has a better low-temperature flexibility and adhesion. Therefore, the comprehensive performance of EVA adhesive film can be evaluated by testing the content of VA in the film.

2, The determination of melt index: melt index (MI) reflects the fluidity of EVA film. Higher melt index of EVA film fluidity, good laying, physical bonding points more, and thus greater peel strength. However, if the melt index is too large, it may lead to a reduction in the degree of polymerisation of EVA, its own strength is weakened, the bonding force instead of decreasing.

3, Crosslinking degree test: EVA film crosslinking degree is an important indicator to measure the structural integrity of its network. Crosslinking is too low or too high will affect the performance of the film. Specialised equipment, such as ME-PV-CLK2000 EVA crosslinking tester, can be used to accurately detect the crosslinking degree of EVA adhesive film to ensure the quality of PV modules.

4. Thickness measurement: The thickness of EVA adhesive film is usually between 300 and 500 microns, and the uniformity of the thickness has an important impact on the performance of PV modules. Therefore, testing the thickness of the adhesive film and its consistency is also an important aspect of judging the quality.

5, Standard compliance: check whether the EVA film is in line with the relevant national standards or industry standards, such as "photovoltaic module encapsulation with ethylene vinyl acetate copolymer (EVA) film" and so on, these standards provide for the performance requirements and test methods for EVA film.

6, A comprehensive assessment of performance: In addition to the above specific test items, the comprehensive performance of the EVA film should also be assessed, including its aging resistance, light transmission, weather resistance.

7, The choice of suppliers: the choice of reputable, technically mature suppliers is also an important factor in ensuring the quality of EVA film.

In summary, to judge the quality of solar eva film need to comprehensively consider its VA content, melt index, crosslinking degree, thickness, compliance with standards and comprehensive performance and other factors. Through professional testing and evaluation, it can be ensured that the selected EVA film meets the production requirements of PV modules, thus guaranteeing the performance and life of PV products.

Zanchen New Material

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Guangzhou Zanchen New Material Technology Co., Ltd. is a pioneer in the field of solar film innovation, integrating scientific research, design, production and sales. We are located in Xinhua Industrial Park, Yingbin Avenue, Huadu District, Guangzhou City. We are an industrial and trade enterprise with rich professional experience in the industry. The company has offices in Zhejiang and Chengdu, specializing in the R&D, production and sales of polyurethane (TPU) films, EVA solar photovoltaic films, and EVA glass films.

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