TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Method: In step (a), the milling process is carried out at 130-150 degrees C and the mixing process is performed for 2-4 minutes in a bunbury mixer. In step (b), the milling process is carried out at 130-150 degrees C and the mixing process is performed for 4-8 minutes in a bunbury mixer. In step (i), the milling process is carried out at 140-160 degrees C and the mixing process is performed for 2-5 minutes in a bunbury mixer. In step (ii), the milling process is carried out at 140-160 degrees C and the mixing process is performed for 4-10 minutes in a bunbury mixer. The irradiation process in step (C) is performed using an electron beam at an irradiation dosage of 6-10 Mrad.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The magnesium hydroxide is preferably superfine magnesium hydroxide with mass concentration of not less than 99.8 %, specific surface area of 4-6 m2/g, and average particle size of 1-2.4 mu m. The zinc borate has zinc oxide (ZnO) content of 36-39 mass %, boron oxide (B2O3) content of 46.5-49.5 mass %, and particle size of 5000 mesh. The phosphorus-based flame retardant can also be an encapsulated red phosphorus (preferably microencapsulated red phosphorus) having a phosphorus content of greater than or equal to 80 mass % and a particle size of 1500 mesh.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic montmorillonite preferably consists of alkyl-substituted quat-ammonium salt-modified organic montmorillonite or organic ammonium salt-modified organic montmorillonite; and has a montmorillonite content of 96-98 wt.%, a diameter-to-thickness ratio of 200, a particle size of 200 mesh (accounted for 99.9 wt.%), and a layer thickness of less than 25 nm. The crosslinking sensitizer consists of trimethylolpropane triacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, and/or triallyl isocyanate. The lubricant consists of zinc stearate, magnesium stearate and/or n-butyl stearate. The antioxidant comprises thiobisphenol type antioxidant (preferably 4,4'-thiobis(6-tert-butyl-3-methylphenol)) and hindered phenolic antioxidant (preferably pentaerythritol tetra-( beta -(3,5-di-tert-butyl-4-hydroxyphenyl)propionate)) at (1-3):1 mass ratio. The light stabilizer comprises high molecular weight hindered amine light stabilizer (preferably poly-((6-((1,1,3,3-tetramethylbutyl)-imino)-1,3,5-triazine-2,4-diyl)(2-(2,2,6,6-tetramethylpiperidinyl)-amino)-hexylidene-(4-(2,2,6,6-tetramethylpiperidinyl)-imino))) and benzophenone-based ultraviolet absorber (preferably 2-hydroxy-4-octyloxybenzophenone) at 1:1 mass ratio. The copper ion inhibitor preferably consists of MDA-5 copper ion inhibitor. The melamine cyanurate has a purity of greater than or equal to 99.5 mass%.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The EVA has a vinyl acetate content of 14 mass % and a melt index of 3.5 g/10 minutes. The LLDPE has a melt index of 2 g/10 minutes and a density of 0.918 g/cm3. The EMA has a methyl acrylate content of 23-26 mass % and a melt index of 0.4-0.6 g/10 minutes. The MAH-g-EVA has a grafted MAH content of 1-1.2 wt.% and a melt index of 1.1-2 g/10 minutes. The masterbatch (M) comprises EVA as matrix resin. The phosphorus-based flame retardant can be ammonium polyphosphate having a polymerization degree of greater than or equal to 1000.