| 摘要 |
PROBLEM TO BE SOLVED: To provide a film material for an internal illumination signboard that is a fiber composite film material having high light transmission and excessive light diffuseness and is made to fit for an in-combustibility test even in a using state where an overlay film for protecting a printing layer is stuck to the whole surface, and to provide an internal illumination signboard. SOLUTION: An incombustible internal illumination signboard includes a sheet, in which a flame resisting resin coating layer is disposed on one surface or more of cloth obtained by arranging and knitting inorganic filament bundles without gap, and a printing layer is disposed on the surface of at least one upper layer of the flame resisting resin coating layer. The flame resisting resin coating layer has a sea-island structure by immiscible mixing of two or more kinds of synthetic resins. The island component has no flame retardant and has light diffuseness/transmission, and the sea component includes a light diffuseness/semi-transmission structure having a flame retardant. The thickness ratio of the fiber composite base material to the overlay layer is set within a range of 10:1 to 10:2.5. COPYRIGHT: (C)2011,JPO&INPIT |
