| 摘要 |
<p>Provided is a foam sheet which exhibits extremely excellent diffuse reflection performance, while having excellent flexibility and excellent heat resistance. This foam sheet does not require a foaming method such as a supercritical fluid foaming method that is not easily controlled nor a mechanical post-treatment such as cutting. A foam sheet of the present invention comprises, as the outermost layer, a foam layer that contains a hydrophilic polyurethane polymer, and the surface of the foam layer has an arithmetic average specular reflectance of 1% or less within the wavelength range of 400-500 nm.</p> |
