| 摘要 |
The present invention provides a transmissive screen having as a member an extruded resin sheet (A) obtained by extrusion of a transparent resin (P) in a heat melt state from a die (D) in one direction, and provides a transmissive screen, wherein in the case where the extruded resin sheet (A) is subjected to a heating test of maintaining the resin sheet at 150° C. for 1 hour, the shrinkage factor (S) in the extrusion direction evaluated from Equation (1): <?in-line-formulae description="In-line Formulae" end="lead"?>S=(L<SUB>0</SUB>-L<SUB>1</SUB>)/L<SUB>0</SUB> x100 ( 1 )<?in-line-formulae description="In-line Formulae" end="tail"?> wherein S represents the shrinkage factor (%) in the extrusion direction, L<SUB>0 </SUB>represents the length (mm) in the extrusion direction prior to the heating test, and L<SUB>1 </SUB>represents the length (mm) in the extrusion direction after the heating test, satisfies Equation (2): <?in-line-formulae description="In-line Formulae" end="lead"?> 2 /X<=S<= 18/X ( 2 )<?in-line-formulae description="In-line Formulae" end="tail"?> wherein S means the same as S in Equation (1), and X represents the sheet thickness (mm) of the extruded resin sheet (A).
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