| 摘要 |
PROBLEM TO BE SOLVED: To provide a raw sheet for a lens sheet which realizes cracking resistance while ensuring self-supporting properties, a lens sheet using the raw sheet, and a project screen provided with the lens sheet. SOLUTION: In the raw sheet constituting the lens sheet having the UV curable resin layer laminated on a UV resin layer as a base sheet, and consisting of a ductile material, deflection breakage in bending of the ductile material is at least 0.08 and Izot impact value is at least 5 KJ/m<2> . In addition, in the raw sheet consisting of a brittle material, when shearing force of the UV curable resin is F (MPa) and thickness of the raw sheet is h (m) and bending elasticity of the brittle material is E (MPa) and deflection in bending isω(non-dimensional quantity), a material provided with physical properties in which a relation F/hEω< 1.5 is held is provided.
|
