Sveck's EVA Films With Varying Thermal & Mechanical Properties

The 4^th edition of the TaiyangNews Market Survey on Backsheets and Encapsulation covers 4 segments: EVA and non-EVA encapsulants, and fluoropolymer and non-fluoropolymer backsheets. China-based Sveck, one of the top 3 EVA suppliers globally, has provided data for 2 ultra-fast-cure EVA-based encapsulants.

The CO-556 product launched in 2020 comes with a standard thickness of 450 μm, with thickness options ranging from 400 to 900 μm and widths of up to 1,320 mm. It has a tensile strength of 6 MPa. This product supports laminating temperatures of 148 to 153°C, 6 to 7 minutes for vacuum and between 12 and 15 minutes of press time. The crosslinking is accomplished in a temperature window of 148 to 153°C. This EVA model comes with a volume resistivity of 1 × 10¹⁴ Ω cm.

SV-15296P/SV-15297P, introduced in 2014, is another product by Sveck. This product is offered in a thickness range of 450 μm to 800 μm. It has a standard width of 985 mm but can be opted for in widths ranging from 970 to 1,350 mm. The density of this encapsulant is given as 0.95 to 0.96 g/cm³and its tensile strength is also a little different at 16 MPa. The EVA product range supports laminating temperatures of 140 to 148°C.

As for the lamination cycle time, 4 to 5 minutes is recommended for vacuum and between 9 and 10 minutes for press time. The crosslinking is accomplished in a temperature window of 138 to 150°C. The film has a vinyl acetate content of 28% and > 75% gel content. This EVA model comes with a slightly lower volume resistivity of 1 × 10¹⁵ Ω cm.

The text is an excerpt from the latest TaiyangNews Market Survey on Backsheets & Encapsulation Materials 2024/25, which can be downloaded for free here.