▎ 摘 要
NOVELTY - A photovoltaic backboard comprises sequentially weather-resistant layer (1), base layer (2), black reflecting layer (3) and barrier layer (4). The layer (3) is provided with organic pigment. The layer (4) is prepared from high barrier composition comprises 50-90 pts. wt. polymer resin, 3-30 pts. wt. nano material and 1-12 pts. wt. additive. USE - Photovoltaic backboard used in photovoltaic module (claimed) e.g. solar cell module. ADVANTAGE - The photovoltaic backboard comprises barrier layer comprising high barrier composition containing polymer resin and nano material to form a dense structure, obstructs water vapor and air, organic pigment and polar substance, and reduces polar substance absorbing pigment generated in the hydrolysis process of the adhesive film. Even if the adhesive film generates polar substance due to water vapor action far away from one side of the backboard, because the barrier layer can prevent organic pigment, and avoids high anti-black coating organic substance and contact film to solve the film dyeing problem. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a photovoltaic module, which comprises front layer transparent packaging board, front layer packaging film, battery sheet layer, back layer packaging film and back board. The back board is the photovoltaic backboard. The barrier layer of the back board is adjacent to the adhesive film. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the photovoltaic backboard. 1Weather-resistant layer 2Base layer 3Black reflection layer 4Barrier layer