Betterial’s B602 and B602P feature thicknesses of 200 to 800 µm and widths of 1,000 to 1,300 mm, with identical mechanical properties and surface finish
B602 blocks over 80% UV between 280 to 380 nm, while B602P cuts UV transmission to under 30%
Both films support lamination temperatures of 140–155°C and offer more than 91% light transmittance
Betterial, a Chinese backsheet and encapsulation manufacturer, makes its debut in the TaiyangNews Combined Market Survey. The 4th edition of our backsheets and encapsulation survey features data from 12 suppliers covering 36 non-EVA products, including 2 POE-based films from Betterial – B602 and B602P.
These POE-based non-EVA encapsulation products are designed for advanced solar module applications, adhering to conventional curing processes. These products feature a thickness range of 200 to 800 μm and a width range of 1,000 to 1,300 mm, with a density of 0.86 to 0.89 g/cm³. Both variants are transparent and come with a random embossed surface finish.
Their mechanical and chemical properties include a tensile strength of ≥ 8 MPa, elongation of ≥ 600%, and minimal shrinkage of ≤ 3% in MD and ± 1.5% in TD direction. Their adhesive strength to both glass and backsheets is rated at ≥ 60 N/cm. Processing conditions are optimized with a lamination temperature of 140 to 155°C. Both products feature a gel content of 75 to 95%.
Performance-wise, these encapsulants achieve > 91% light transmittance in the 380 to 1,100 nm range. B602 has a UV cut-off above 80% for wavelengths between 280 and 380 nm, while B602P is optimized for high UV cut-off performance with less than 30% transmission in the same range.
Both have a refractive index of 1.48 ± 0.05, high volume resistivity of > 1 × 1015 Ω cm, and low water absorption of < 0.2 wt%.
The text is an excerpt from the latest TaiyangNews Market Survey on Backsheets & Encapsulation Materials 2024/25, which can be downloaded for free here.