TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The blocked cross-linking agent is isocyanate-based compound blocked with a blocking agent. The blocking agent includes phenol-, oxime-, active methylene-, epsilon -caprolactam-, triazole- and/or pyrazole-class of blocking agent, preferably methyl ethyl keoxime, 3,5-dimethylpyrazole and/or diethyl malonate. The composition further comprises an additive including a pigment, a filler, an UV stabilizer and/or a thermal stabilizer.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The thermosetting fluororesin is a copolymer of hydroxyl groups-containing ethylene compounds and vinylidene fluoride, vinyl fluoride, tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, trifluoroethylene, hexafluoroisobutylene, perfluorobutyl ethylene, perfluoro(methylvinylether), perfluoro(ethylvinylether), perfluoropropylvinylether, perfluorohexyl vinyl ether, perfluoro-2,2-dimethyl-1,3-dioxole or perfluoro-2-methylene-4-methyl-1,3-dioxolane. The blocked cross-linking agent content is 0.5-1.5 equivalent based on 1 equivalent of the hydroxy group of the thermosetting fluororesin. The material is a polymer film, and contains functional group including hydroxy group, carboxy group, amine group and/or amino group on its surface. The polymer film includes acrylic film, polyolefin film, polyamide film, polyurethane film, polyester film, polyethylene terephthalate film, polyethylene naphthalate film and/or polybutylene terephthalate film. Preferred Method: The material is processed by plasma, corona, primer, anchor agent, coupling agent and/or thermal process on one side or both sides of the material. An inorganic oxide deposition layer is formed on one side or both sides of the material. The thickness of the material in the multi-layer film is 50-500 mu m. The thickness of the fluororesin layer in the multi-layer film is 3-50 mu m. The fluororesin layer forming step comprises coating the resin composition on the material and drying the material coated with the resin composition. The method further comprises processing the material before the fluororesin layer forming step by plasma treatment, corona treatment, primer treatment, anchor agent treatment, coupling agent treatment, deposition treatment and/or thermal treatment on one side or both sides of the material. EXAMPLE - Poly(ethylene terephthalate) (PET) film treated by acrylic primer on both sides of thickness of 250 mu m was processed by corona treatment on its surface. 100 pts. wt. Zeffle GK-570 (RTM: Copolymer of hydroxy group-substituted ethylene and tetrafluoroethylene as thermosetting fluororesin) with 60% solid content was added to 35.7 pts. wt. isophorone diisocyanate blocked with methyl ethyl keoxime as cross-linking agent and then 60 pts. wt. titanium dioxide as pigment was added. 10 pts. wt. Methyl ethyl ketone was added and stirred to form fluororesin layer coating solution. The coating solution was coated one side of the material by comma reverse method. Then the dried material was successively passed through three ovens maintained at 180 degrees C respectively at the speed of 1 m/minute to form the fluororesin layer. Then the material was cured at room temperature for 1 week to obtain the multi layer film containing fluororesin layer coated on one side of the material PET film.