SHEET FOR TRANSMITTED LIGHT AND MANUFACTURING METHOD THEREFOR

To provide a sheet for transmitted light, with which it is possible to realize high diffusibility while suppressing a sharp rise in manufacturing cost and an increase in weight and appropriately respond to the reduced thickness of an illumination panel, and a method for manufacturing the sheet for transmitted light.SOLUTION: Provided is a noncombustible sheet 1 for transmitted light prepared by covering a substrate 2 composed of a noncombustible glass cloth with a resin layer 3 and forming it into the shape of a sheet having light diffusibility and light permeability. The resin layer 3 includes, as a light diffusion layer for diffusing light, a foamed light diffusion layer C prepared by mixing a light diffusion agent having light diffusibility and a foaming agent having foamability into a base resin and then foaming the mixture.SELECTED DRAWING: Figure 1 【課題】製造コストの高騰や重量の増加を極力抑制しながら高い光拡散性を実現し、照明パネルの薄型化に適切に対応することのできる透過光用シート及びそれの製造方法を提供する。【解決手段】不燃性のガラスクロスからなる基材２を樹脂層３で被覆して光拡散性と光透過性を有するシート状に構成された不燃性の透過光用シート１であって、前記樹脂層３には、光を拡散させる光拡散層として、光拡散性を有する光拡散剤及び発泡性を有する発泡剤をベース樹脂に配合して発泡させた発泡光拡散層Ｃが含まれる。【選択図】図１