Co-extruded backsheet for solar cell modules

This invention relates to a solar-cell module backing layer obtained by co-extruding obtained by melt co-extruding (i) a first polymer composition comprising (a) a polyamide, (b) an elastomer and (c) an elastomer that contains groups that bond chemically and/or interact physically with the polyamide, and wherein the first polymer composition comprises from 10 to 90 wt.% of the polyamide (a) and from 10 to 90 wt.% of the elastomer (b) and (c) (of the total weight of polyamide (a) and elastomer (b) and (c) present in the first polymer composition) and (ii) a second polymer composition comprising from 50-98 wt.% of elastomer and from 0.15-5 wt.% of groups (based on the total weight of the second polymer composition) that bond chemically and/or interact physically with the solar cell and optionally with the first polymer composition. 本发明涉及通过熔融共挤出聚合物组合物得到的太阳能电池模块背衬层，所述聚合物组合物包括：(i)第聚合物组合物，其包含：(a)聚酰胺，(b)弹性体和(c)含有与所述聚酰胺化学键合和/或物理相互作用的基团的弹性体，且其中所述第聚合物组合物包含(所述第聚合物组合物中存在的聚酰胺(a)以及弹性体(b)和(c)的总重量的)10-90wt.％的所述聚酰胺(a)以及10-90w