Core-shell structure fireproof decoration foamed sheet and preparation method thereof

The invention discloses a core-shell structure fireproof decoration foamed sheet and a preparation method thereof. The core-shell structure fireproof decoration foamed sheet is formed by overlapping and bonding a core foaming layer, a permeation closed layer and a shell decoration layer. The core foaming layer comprises foam glass and a coal ash foamed sheet formed by conducting dissolving, mixing, vibration forming, low-temperature curing, demolding and cutting on sodium silicate, silica soil, white cement, quartz powder, coal ash, bentonite, hydrogen peroxide, ammonia water and water. The permeation closed layer is prepared from polymer emulsion, magnesium hydrate, talcum powder and lithopone. The shell decoration layer is prepared from macromolecule resin, cross-linking agents, pigment, magnesium hydrate, nanometer SiO2 and methylsiloxane. The preparation method includes the steps of core foaming layer permeation closing, shell decoration layer slurry preparation, mold preparation, grouting, exhausting, size reducing, solidification shaping, high-temperature processing, cooling, demolding, trimming, grinding, polishing and the like. The sheet is smooth in surface, high in strength, high in glossiness, large in density, small in heat conduction coefficient and capable of being applied to building heat preservation decoration.