TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The base film layer is polyester film or polyamide film. The third layer is a polyfluoroolefin film layer. The thickness of the encapsulation functional layer is 20-1000 mu m. Preferred Composition: The base film layer, an adhesive layer and the third layer may further comprise filler, antioxidant, ultraviolet stabilizer, anti-hydrolysis agent, flame retardant, plasticizer, pigment, coupling agent and/or filling agent. The encapsulation functional layer can further include filler, antioxidant, ultraviolet stabilizer, anti-hydrolysis agent, flame retardant, plasticizer, pigment, coupling agent, and/or filling agent.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The peroxide cross-linking agent is 1,1-di-(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 2,5-dimethyl-2,5-di-(benzoyl peroxy)hexane, dicumyl peroxide, bis(tert-butylperoxyisopropyl)benzene, tert-butyl cumyl peroxide, di-tert-butyl peroxide, tert-amyl perbenzoate, 2,2-bis(tert-amylperoxy)butane, di-tert-amyl peroxide, tert-butyl peroxybenzoate, tert-butylperoxy-3,5,5-trimethyl hexanoate, benzoyl peroxide, bis(p-chlorobenzoyl)peroxide, bis(2,4-dichlorobenzoyl)peroxide, di(4-methylbenzoyl) peroxide, n-butyl 4,4-di (tert-butylperoxy)valerate, ethyl-3,3-bis(tert-butylperoxy)butyrate, tert-butylperoxy isopropyl carbonate, tert-butyl peroxy-2-ethylhexyl carbonate, O,O-tert-butyl-O-isopropyl peroxycarbonate, O,O-tert-butyl-O-(2-ethylhexyl)-peroxycarbonate, O,O-tert-pentyl-O-(2-ethylhexyl)-peroxycarbonate. The content of the peroxide crosslinking agent is 0.05-8 wt.%. The encapsulation functional layer comprises a silane coupling agent. The silane coupling agent is an organosilicon compound of formula (Y1-RSiX3) (I). The content of the silane coupling agent is 0.05-5 wt.%.Y1 = vinyl, amino, epoxy, methacryloyloxy, sulfhydryl or ureido;R = alkyl; andX = Cl, OCH3, OC2H5, methoxyethoxy or acetoxy.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polyester is polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN) and/or polytrimethylene terephthalate (PTT). The polyamide is polyamide 6, polyamide 66, polyamide 46, polyamide 610, polyamide 612, polyamide 614, polyamide 613, polyamide 615, polyamide 616, polyamide 11, polyamide 12, polyamide 10, polyamide 912, polyamide 913, polyamide 914, polyamide 915, polyamide 616, polyamide 936, polyamide 1010, polyamide 1012, polyamide 1013, polyamide 1014, polyamide 1210, polyamide 1212, polyamide 1213, polyamide 1214, polyhexamethyleneterephthalamide, poly(terephthalic acid azelamide), poly(terephthalic acid sebacamide), poly(terephthalic acid dodecyl diamide), hexanediamide/hexanediamide terephthalate copolyamide, adipamide terephthalate/adipamide isophthalate copolyamide, poly(adipic acid m-xylene amide) (sic), hexanediamide terephthalate/terephthalic acid 2-methyl glutaramide, hexanediamide adipate/hexanediamide terephthalate/hexanediamide isophthalate copolyamide and/or poly(caprolactam-hexamethylenediamide terephthalate). The polyfluoroolefin is polyvinyl fluoride, polytetrafluoroethylene, fluorinated ethylene-propylene copolymer, ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene-vinylidene difluoride copolymer, polyvinylidene fluoride, poly(vinylidene difluoride), ethylene-chlorotrifluoroethylene copolymer and/or polytrifluorochloroethylene. The adhesive layer comprises polyethylene-ethylene copolymer, polypropylene-modified polypropylene, thermoplastic polyurethane, acrylate resin and acrylonitrile butadiene styrene resin. The encapsulation functional layer includes polyolefins, olefin copolymers, polyvinyl alcohol butyral, ionomers, polyurethane and/or epoxy resin. During the direct coating, the adhesive layer comprises polyurethane adhesive, acrylic adhesive and epoxy resin adhesive. In the melting and extruding process, the adhesive layer includes polyethylene, ethylene copolymer, polypropylene and modified polypropylene, thermoplastic polyurethane, acrylic resin and acrylonitrile butadiene styrene resin. The polyethylene comprises low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, 2-8C olefin grafted polyethylene or a copolymer of ethylene, maleic anhydride grafted polyethylene, silane-grafted polyethylene. The ethylene copolymer is a copolymer of ethylene and at least one of vinyl acetate, acrylic acid 1-4C alkyl ester, methacrylic acid 1-4C alkyl ester, acrylic acid, methacrylic acid, maleic anhydride, glycidyl acrylate, methyl acrylate and glycidyl methacrylate. Preferred Method: The encapsulation functional layer is directly compounded at the inner side of the base film by using melt co-extrusion process. The adhesive layer, the base film layer and the encapsulation functional layer are directly compounded with the third layer by using melt co-extrusion process. The adhesive layer is added in between encapsulation functional layer and the base film, the adhesive layer can be melt extruded or applied directly to the base film and encapsulation functional layer.