Photovoltaic module backsheet comprising polyolefin layer

• Main Authors: VAN DUME KURT, GUARDI, ALESSANDRO, ZHAO RUOFEI, JANSEN ROBERT, DANE ROBIN
• Format: Patent
• Language: Chinese; English
• Published: 20.10.2023
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; TRANSPORTING

The present invention relates to a photovoltaic module backsheet comprising, in order: a photovoltaic module backsheet comprising a functional layer and a weather resistant layer, where the backsheet is free of fluorinated polymers, characterized in that: i) the functional layer comprises a blend of polyethylene and a polyethylene copolymer, where at least 50% by weight of the functional layer is polyethylene; ii) the weather resistant layer comprises a first sub-layer facing the functional layer, and a second sub-layer, wherein a) each of the first sub-layer and the second sub-layer comprises at least 50% by weight of polypropylene; and b) the second sub-layer has a minimum glass transition temperature (Tg) of less than-40 DEG C. The invention also relates to a method for producing a backsheet and to a photovoltaic module comprising a backsheet according to the invention. 本发明涉及光伏模块背板，依次包含：包含功能层和耐候层的光伏模块背板，其中背板不含氟化聚合物，其特征在于：i)功能层包含聚乙烯和聚乙烯共聚物的共混物，其中至少50重量％的功能层是聚乙烯；ii)耐候层包括面向功能层的第一子层，和第二子层，其中a)第一子层和第二子层中的每一个包含至