The Standardization Administration of China (SAC) has approved a new testing regime supported by Trina Solar regarding the test method for determining vinyl acetate (VA) content of ethylene-vinyl acetate copolymer applied in modules using Thermal Gravimetric analysis (TGA).
TGA measures the quality and the temperature when the testing material is subject to temperature changes. Ethylene-vinyl acetate (EVA) is hot-melt adhesive film, protecting the topside of cells from contact with glass.
Trina Solar said that a major problem with sourcing EVA material had been the lack of a standardized, fast, and environmentally friendly test method for detecting the VA content to ensure the quality of EVA.
Trina Solar proposed the EVA-TGA test to the SAC in 2012 and entered the project that entailed a lengthy process, which included forming a working group, drafting the standard, discussion and analysis, comparison tests, and seeking inputs and comments, the standard successfully passed the review with the outcome that it was published by both the SAC and the General Administration of Quality Supervision, Inspection and Quarantine of China.
Jifan Gao, Chairman and CEO of Trina Solar said, “With the introduction of this new EVA-TGA standard, testing the VA content of EVA across the PV industry in China should become more streamlined and efficient, and it will provide a solid evaluation basis for ensuring EVA film quality. We are confident that this new standard will bring concrete improvements to the industry.”