Patent ID: 7614186

Claim:
A multiwall sheet, comprising: greater than or equal to three non-intersecting polymer walls; a transverse layer, wherein the transverse layer intersects the walls forming cells; and a liquid located in the cells; wherein the multiwall sheet has a first visible light transmission and a first direct solar transmission; wherein a second multiwall sheet has a same material and a same design as the multiwall sheet except comprises no liquid, and has a second visible light transmission; wherein the first visible light transmission is greater than the second visible light transmission and the first direct solar transmission is about 63% to about 70% as determined in accordance with ISO 9050, second edition, Aug. 15, 2003 (reference number ISO 9050:2003(e)) with a perpendicular measurement; and wherein the liquid has a liquid refractive index and the polymer walls have a polymer refractive index, and wherein the liquid refractive index is different than the polymer refractive index.