J400M & J800M are the typical products from the co-extruded POE encapsulating Film series, developed by Sinopoly Materials. J400M is the standard one, with high transparency, normally for the front side, while J800M is the UV cut-off type, targeting the back side. Both of them have excellent barrier properties, anti-PID performance, good weatherability and adhesion strength retention, which are perfect for double sided modules. It’s also acceptable for tailor made grades according to your given requirements.