| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a film mirror which is not susceptible to adhesion of dust or the like and is suppressed in decrease of the reflectance even if the film mirror is exposed to dust, the film mirror used for sunlight collection.SOLUTION: A film mirror comprises a resin base 10 with a metal reflective layer 12 where a reflective layer is composed of silver or the like, a first resin layer 30 and a second resin layer 40 in this order. The elastic modulus recovery ratio (E2) of the second resin layer 40 is larger than the elastic modulus recovery ratio (E1) of the first resin layer 30, and the elastic modulus recovery ratio (E1) of the first resin layer 30 is 60% or more and less than 80%.</p> |
