TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The solvent is acetone, methyl ethyl ketone, dimethylformamide and dimethylacetamide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The high-molecular-coated layer comprises (meth)acryl group-containing polymer. The (meth)acryl group-containing polymer is chosen from urethane monomer, sulfone monomer, imine monomer, amide monomer, polyester monomer, aliphatic polyester, polyester urethane, (meth)acrylamide monomer, urea monomer, polycarbonate monomer, and (meth)acrylic monomer, (meth)acrylamide monomer and vinyl monomer. The polymer further contains functional group chosen from carboxyl group, sulfonic acid group, aziridine group, acid anhydride group, amine group, isocyanate radical, cyanuramide group, epoxy group, hydroxy group, ester group, carbamate group, amide group, urea group, imide group, phosphate group, phosphate group, cyano group, cyanate group and imine group. The fluororesin comprises homopolymer including monomer chosen from vinylidene fluoride, vinyl fluoride, tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, trifluoroethylene, hexafluoroisobutylene, perfluorobutylethylene, perfluoromethylvinylether, perfluoroethyl vinyl ether, perfluoropropylvinylether, perfluoromethylvinylether, perfluoro-2,2-dimethyl-1,3-dioxole and perfluoro-2-methylene-4-methyl-1,3-dioxolan. The fluororesin layer further contains amorphous resin, pigment, filler, ultraviolet stabilizer, thermal stabilizer and barrier particles. The amorphous resin is chosen from acrylic resin, polycarbonate, polyvinyl chloride, styrene-(meth)acrylonitrile copolymer, styrene-maleic anhydride copolymer, cycloolefin polymer, polyacrylonitrile, polystyrene, polysulfone, polyethersulfone and polyarylate. The multilayer sheet further has laminate or co-extruded material (11) containing aluminum, iron, polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate. Preferred Properties: The thickness of high-molecular-coated layer is 10-5000 nm. The fluorine-based resin has crystallinity degree of 55% or less. The average molecular weight of polymer is 50000-1000000. The fluororesin has melting point of 80-175 degrees C. The thickness of fluororesin layer is 3-50 mu m. The thickness of the laminate or co-extruded material is 50-500 mu m. Preferred Process: The fluororesin layer is formed using solution containing fluororesin and solvent having boiling point of 200 degrees C or less.