Patent ID: 7992361

Claim:
A multiwall panel, comprising: a top sheet comprising a top surface and a bottom surface; a bottom sheet comprising a first surface and a second surface; a rib disposed between the bottom surface and the first surface; wherein micro-scale surface features are disposed on the top surface and the bottom surface and/or on the first surface and the second surface; wherein if the micro-scale surface features are disposed on the top surface and the bottom surface, the micro-scale surface features disposed on the top surface are parallel to the micro-scale surface features disposed on the bottom surface, if the micro-scale surface features are disposed on the first surface and the second surface, the micro-scale surface features disposed on the first surface are parallel to the micro-scale surface features disposed on the second surface, or if the micro-scale surface features are disposed on the top surface, the bottom surface, the first surface, and the second surface, the micro-scale surface features disposed on the top surface are parallel to the micro-scale surface features disposed on the bottom surface and/or the micro-scale surface features disposed on the first surface are parallel to the micro-scale surface features disposed on the second surface; and, wherein the multiwall panel comprises an average light transmission of greater than or equal to about 70% as measured by ASTM D-1003-00, wherein the light transmission is measured from incidence angles from about −80° to about 80° in about 10° increments.