Transparent flame-retardant thermal-insulating UV-blocking polymer composite film, preparation method and uses thereof

Abstract

Disclosed is a transparent, flame-retardant thermally-insulating, UV-blocking polymer composite film, comprising sequentially from the top: a flame retardant layer, a base layer, a thermal insulation layer, and a UV-blocking layer, having a total film thickness of 1 m to 500 m, visible light transmittance greater than 80%, UV light transmittance less than 1%, and near-infrared transmittance less than 10%. Also disclosed is a preparation method for the present transparent, flame retardant thermally-insulating, UV-blocking polymer composite film, the technical processes whereof are simple and easy to execute, involve low production costs, and are suitable for industrial mass production. The present transparent, flame retardant thermally-insulating, UV-blocking polymer composite film can be used on such transparent materials and items as glass, windows, protective films, containers and electronic components, and has applications in such fields as construction, transportation, electronics, aerospace and medicine.

Claims

1. A transparent flame-retardant thermal-insulating UV-blocking composite film, comprising a flame retardant functional layer, a substrate layer, a thermal insulation functional layer and a UV-blocking functional layer and a substrate layer from top to the bottom, wherein the flame retardant functional layer comprises 1050 wt % of an inorganic flame retardant, 5070 wt % polymer and 020 wt % aids, the inorganic flame retardant is selected from one or more of magnesium hydroxide particle, aluminum hydroxide particle, zinc borate, antimony trioxide and -molybdenum trioxide, and the polymer of the flame retardant functional layer is selected from one of polydimethylsiloxane and polytrimethylene terephthalate.

2. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein, the transparent flame-retardant thermal-insulating UV-blocking composite film has a thickness of 1 m500 m.

3. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein, the flame retardant functional layer has a thickness of 100 nm100 m; the inorganic flame retardant is in shape of cubic, spherical, rod-like, strip-like, needle-like, flake-shaped or sea urchin-shaped; the magnesium hydroxide particle of the inorganic flame retardant is prepared by the following steps: (1) dissolving magnesium salt in water or an organic solvent to obtain a magnesium salt solution; dissolving alkali in water or an organic solvent to obtain lye; (2) adding the magnesium salt solution and the lye into a molecular mixing enhanced reactor (characterized in that: the molecular mixing characteristic time is less than the nucleation induction time), into a high gravity rotating packed bed or a microchannel reactor for reaction; and obtaining a suspension of magnesium hydroxide after the reaction; (3) adding a surfactant to the suspension of magnesium hydroxide to modify; allowing the modified liquid to stand after the modification; (4) filtering and washing the modified liquid to obtain the desired magnesium hydroxide particles; the magnesium salt is selected from one or more of the following substances: magnesium sulfate, magnesium nitrate, magnesium chloride and magnesium acetate; the magnesium salt solution has a concentration of 1 wt %35 wt %; the organic solvent is selected from one or more of the following substances: methanol, ethanol, ethylene glycol, isopropanol, glycerol, butanol, acetone, butanone, ethyl acetate, butyl acetate, benzene, toluene, xylene, dimethyl sulfoxide and tetrahydrofuran; the lye is selected from one or more of the following substances: sodium hydroxide solution, potassium hydroxide solution and aqueous ammonia; the sodium hydroxide solution is a solution formed by dissolving sodium hydroxide in water or an organic solvent; the potassium hydroxide solution is a solution formed by dissolving potassium hydroxide in water or an organic solvent; the organic solvent is selected from one or more of the following substances: methanol, ethanol, ethylene glycol, isopropanol, glycerol, butanol, acetone, butanone, ethyl acetate, butyl acetate, benzene, toluene, xylene, dimethylsulfoxide, tetrahydrofuran, n-hexane and cyclohexane; the lye has a concentration of 1 wt %40 wt %; in step (1), the magnesium salt solution and lye are respectively placed in a storage tank, and the temperature is maintained at 2070 C.; in step (2), the reaction temperature is 2070 C.; in step (2), the high gravity rotating bed reactor is selected from RPB high gravity rotating bed reactor, baffled high gravity rotating bed reactor, spiral channel high gravity rotating bed reactor, rotor-stator high gravity rotating bed reactor or a high gravity rotating bed reactor with rotating disks; the rotor speed of the rotating bed is 3005000 rpm; in step (2), the molar velocity ratio of magnesium salt solution to lye solution introduced into the rotating packed bed is 0.2 to 3.5: 1; the magnesium salt solution is introduced into the nozzle of the RPB at a linear velocity of 27 m/s, and lye is at 28 m/s; in step (2), in the microchannel reactor, an outer tube and an inner tube constitute a casing tube; an annular space is formed between the inner tube and the outer tube, which constitutes an annular microchannel; the annular microchannel has a radial spacing of 100 m5 mm; the outer tube is equipped with continuous phase inlet and outlet; the inner tube is equipped with a dispersion phase inlet at one end and is closed at the other end; and the closed end is in the shape of cone or bullet; the tube wall of the columnar inner tube adjacent to the closed end is circumferentially covered with micropores having a pore size in the range of 0.05 to 100 m; the tube wall of the columnar inner tube has an aperture ratio of 3% to 60%; the micropores on the inner tube are the dispersion phase outlets; in step (2), the volume flow ratio of the magnesium salt solution to lye introduced into the casing annular microchannel reactor is (0.510):1; in step (2), the flow of the magnesium salt solution introduced into the outer tube of the casing annular microchannel reactor is 16 L/min, the flow of the lye introduced into the inner tube of the casing annular microchannel reactor is 0.22 L/min; in step (2), a plurality of casing annular microchannel reactors are connected in parallel; in step (2), centrifugal pump, peristaltic pump or metering pump provided with a flowmeter is adopted to adjust the injection rate of the reaction solution; in step (3), the surfactant is selected from one or more of the following substances: cetyl trimethyl ammonium bromide, sodium lauryl sulfate, sodium oleate, polyvinylpyrrolidone, polyethylene glycol, -aminopropyl triethoxysilane, - glycidoxypropyl trimethoxy silane, -methacryloxypropyl trimethoxy silane, N-(-aminoethyl)--aminopropyltrimethoxysilane, N-(-aminoethyl) --aminopropyltriethoxysilane, N--(aminoethyl) --aminopropyl dimethoxy silane, oleic acid, stearic acid, zinc stearate, sodium stearate, titanate and polyvinyl alcohol; in step (3), the modification is carried out in a modification tank, where the modification temperature is 3095 C., the modification time is 0.55 h; in step (3), the mass fraction of the surfactant-coated layer accounts for 1%40% of the modified magnesium hydroxide particles; and in step (3), the standing time is 0.55 h.

4. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein, the thermal insulation functional layer is composed of 550 wt % near-infrared absorbing agent or heat shielding agent, 6080 wt % polymer and 035 wt % aid; the thermal insulation functional layer has a thickness of 100 nm150 m; the near-infrared absorbing agent or heat shielding agent is selected from one or more of indium tin oxide, tin antimony oxide, tungsten oxide, various tungsten bronzes or lanthanum hexaboride; the near-infrared absorbing agent or heat shielding agent is cubic, spherical, rod-like, strip-like, needle-like, flake-shaped or sea urchin-shaped; and the polymer of the thermal insulation functional layer is selected from any one of polyvinyl butyral, polyvinyl pyrrolidone, polyacrylate polymer, polysiloxane polymer, polyurethane polymer, polyterephthalate polymer, polystyrene and polycarbonate or the copolymer or blend of more of them.

5. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein, the UV-blocking functional layer is composed of 460 wt % inorganic absorbing agent, 4096 wt % polymer and 030 wt % aid; the UV-blocking functional layer has a thickness of 100 nm50 m; the inorganic UV absorbing agent is selected from one of zinc oxide, titanium dioxide, cerium oxide, doped zinc oxide, doped titanium dioxide and silica-coated core-shell composite metal oxide particle with any one of the zinc oxide, the titanium dioxide, the cerium oxide, the doped zinc oxide and the doped titanium dioxide as the core or the mixture of more of them; the inorganic UV absorbing agent is cubic, spherical, rod-like, strip-like, needle-like, flake-shaped or sea urchin-shaped; and the polymer of the UV-blocking functional layer is selected from any one of polyvinyl butyral, polyvinyl pyrrolidone, polyacrylate polymer, polysiloxane polymer, polyurethane polymer, polyterephthalate polymer, polystyrene and polycarbonate or the copolymer or blend of more of them.

6. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein, the aid is selected from one or more of diethyl phthalate, dioctyl phthalate, dibutyl phthalate, tributyl phosphate, triphenyl phosphate, tricresyl phosphate, dibutyl sebacate, acrylate copolymer, a non-reactive modified polysiloxane, leveling agent H88, ethylene glycol butyl ether, diethylene glycol di-n-butyl ether, polyether-modified polysiloxane wetting agent, organosilicone defoamer, polyether defoamer, polyvinylpyrrolidone, various types of ionic surfactants, fatty alcohol polyoxyethylene ether, steartrimonium chloride, N, N-bi-hydroxyethyl-N-(3 dodecyloxy-2-hydroxypropyl) methylamine methyl sulfate, stearamidopropyl--ethoxyl-dimethyl ammonium nitrate, stearhydroxylamine propyl--hydroxyethyl-dimethyl triammonium hydrogen phosphate, ethyoxyl lauramide, glycerine-stearate, sodium dithiocarbamate, and sodium dodecyl sulfonate.

7. A method for preparing a transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein: comprising the following preparation steps: (1) dispersing the functional particles of each functional layer into a proper dispersion medium to form a uniform transparent dispersion; uniformly mixing the transparent dispersion with polymer and aid or the solution thereof at a certain concentration to give the film-forming primary liquid of each functional layer (2) coating the flame retardant functional layer obtained from step (1) onto the substrate by use of knife coating, transfer printing, spray coating, impregnation, roller painting, spin coating, extrusion molding or calendaring molding; then curing at 80150 C. or under UV light's irradiation. (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of knife coating, transfer printing, spray coating, impregnation, roller painting, spin coating, extrusion molding or calendaring molding; then curing at 80150 C. or under UV light's irradiation. (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of knife coating, transfer printing, spray coating, impregnation, roller painting, spin coating, extrusion molding or calendaring molding; then curing at 80150 C. or under UV light's irradiation to obtain the product a transparent flame-retardant thermal-insulating UV-blocking composite film.

8. A method for preparing a transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 7, wherein: the dispersion medium in step (1) is one of water, methanol, ethanol, n-heptane, n-hexane, cyclohexane, toluene, xylene, ethyl acetate or butyl acetate or a mixture of more of them.

9. A substrate for forming the transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein the substrate is formed of a transparent polymer film substrate, which is selected from one of polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS), polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC).

10. Use of a transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein the transparent flame-retardant thermal-insulating UV-blocking composite film provided can be used for such transparent materials and items as glass, windows, protective films, containers and electronic components, and has applications in such fields as construction, transportation, electronics, aerospace and medicine.

11. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 1, wherein the polymer of the flame retardant functional layer is polytrimethylene terephthalate.

12. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 4, wherein the near-infrared absorbing agent or heat shielding agent is selected from one or more of tungsten oxide and various tungsten bronzes.

13. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 4, wherein the near-infrared absorbing agent or heat shielding agent is selected from one or more of potassium tungsten bronze, cesium tungsten bronze, rubidium tungsten bronze, potassium cesium tungsten bronze, ammonium tungsten bronze and tungsten oxide.

14. A transparent flame-retardant thermal-insulating UV-blocking composite film according to claim 5, wherein the inorganic UV absorbing agent is silica-coated zinc oxide.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is the structure diagram of the transparent flame retardant thermal-insulating UV-blocking high molecular composite film of the present invention.

(2) FIG. 2 is the UV-Vis-NIR spectrogram of the transparent flame retardant thermal-insulating UV-blocking high molecular composite film prepared in Example 8 of the present invention.

(3) FIG. 3 is the schematic diagram of the contact angle of the flame retardant functional layer of the transparent flame retardant thermal-insulating UV-blocking high molecular composite film prepared in Example 7 of the present invention, wherein the contact angle of the flame retardant functional layer CA=117.82.

(4) FIG. 4 is the actual photo of the high molecular composite film prepared in Example 8 of the present invention.

(5) FIG. 5 is the actual photo of the dispersion containing Mg(OH).sub.2 nanoparticles in Example 1 of the present invention.

(6) FIG. 6 is the actual photo of the dispersion containing ZnO nanoparticles in Example 1 of the present invention.

(7) FIG. 7 is the actual photo of the high molecular composite film prepared in Example 9 of the present invention.

DETAILED DESCRIPTION

(8) ZnO, ITO, ATO and LaB.sub.6 used in the present invention are commercially available products. H88 is a commercially available product, for example produced by Hubei Laisi New Chemical Materials Co., Ltd. Various tungsten bronze particles are synthesized according to the following documents:

(9) Chongshen Guo, Shu Yin, Lijun Huang, Lu Yang and Tsugio Sato. Discovery of an excellent IR absorbent with a broad working waveband: CsxWO.sub.3 nanorods. Chem. Commun., 2011, 47, 8853-8855.

(10) Chongshen Guo, Shu Yin, Qaing Dong and Tsugio Sato. Near-infrared absorption properties of Rb.sub.xWO.sub.3 nanoparticles. Cryst. Eng. Commun., 2012, 14, 7727-7732.

(11) Chongshen Guo, Shu Yin, Qaing Dong and Tsugio Sato. The near-infrared absorption properties of W18O49. RSC. Advances., 2012, 2, 5041-5043.

(12) Lingxiao Liu, XiaoLi Dong, Xiangwen Liu, Fei Shi and Tsugio Sato. Solvothermal synthesis an characterization of tungsten oxides with controllable morphology and crystal phase. J. Alloy. Compd., 2011, 509, 1482-1488.

(13) Chongshen Guo, Shu Yin, and Tsugio Sato. Effects of crystallization atmosphere on the near-infrared absorbtion and electroconductive properties of tungsten bronze type MxWO3(M=Na,K). J. Am. Ceram. Soc., 95, 1634-1639.

(14) Chongshen Guo, Shu Yin, Lijun Huang and Tsugio Sato. Synthesis of one-dimensional potassium tungsten bronze with excellent near-infrared absorption property. ACS Appl. Mater. Interfaces., 2011, 3, 2794-2799.

(15) Chongshen Guo, Shu Yin, Yunfang Huang, Qaing Dong and Tsugio Sato. Synthesis of W18O49 nanorod via ammonium tungsten oxide and its interasting optical properties. Langmuir. 2011,27,12172-12178.

(16) Hiromitsu Takeda and Kenji Adachi. Near-infrared absoption of tungsten oxide nanoparticle dispertions., J. Am. Ceram. Soc., 2007, 90, 2059-2061.

(17) A UV-Visible spectrophotometer of UV-2501 type is used to measure the optical properties of the film prepared in the present invention.

(18) An oxygen index tester of JF-3 type is used to test the flame retardant properties of the film material.

EXAMPLE 1

(19) (1) dispersing the nanoparticles of nano-magnesium hydroxide (Mg(OH).sub.2) into toluene to form an Mg(OH).sub.2-containing transparent dispersion; uniformly mixing the above Mg(OH).sub.2-containing transparent dispersion with PDMS and aid or the solution thereof at a certain concentration to give the film-forming primary liquid, wherein the mass ratio of Mg(OH).sub.2 to PDMS was about 30:70;

(20) dispersing nano-indium tin oxide (ITO) into an appropriate amount of ethanol to form an ITO-containing transparent dispersion; fully uniformly stirring the above ITO-containing transparent dispersion with polyvinyl butyral (PVB) and aid to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was ITO:PVB:aid=5:75:20.

(21) dispersing the ZnO nanoparticles into an appropriate amount of ethanol to form a transparent dispersion containing ZnO nanoparticles; fully mixing the transparent dispersion containing ZnO nanoparticles with polyvinyl butyral (PVB) to obtain the film-forming primary liquid of the UV-blocking functional layer, wherein ZnO:PVB in the film-forming primary liquid was about 5:95.

(22) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of spin coating; then curing at 80;

(23) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of spin coating; then curing at 80;

(24) (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of spin coating; then curing at 80 to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

EXAMPLE 2

(25) (1) dispersing 30 parts nano-aluminium hydroxide (Al(OH).sub.3) into toluene to form an Al(OH).sub.3-containing transparent dispersion; uniformly mixing the above Al(OH).sub.3-containing transparent dispersion with PDMS and an appropriate amount of aid to give the film-forming primary liquid, wherein the mass ratio of Al(OH).sub.3 to PDMS was about 30:70;

(26) dispersing LaB.sub.6 nanoparticles into an appropriate amount of ethanol to form a transparent dispersion containing LaB.sub.6 nanoparticles; uniformly mixing the transparent dispersion containing LaB.sub.6 nanoparticles with polyvinyl butyral (PVB) and aid to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was LaB.sub.6:PVB:aid=5:75:20;

(27) dispersing ZnO nanoparticles into an appropriate amount of ethanol to form a transparent dispersion containing ZnO nanoparticles; uniformly mixing the transparent dispersion containing ZnO nanoparticles with PVB to give the film-forming primary liquid of the UV-blocking functional layer, wherein the mass ratio of ZnO to PVB was about 5:95;

(28) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of spray coating; then curing at 80;

(29) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of spray coating; then curing at 80;

(30) (6) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of spray coating; then curing at 80 to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

EXAMPLE 3

(31) (1) dispersing Mg(OH).sub.2 nanoparticles into toluene to form an Mg(OH).sub.2-containing transparent dispersion; uniformly mixing the Mg(OH).sub.2-containing transparent dispersion with polytrimethylene terephthalate and aid to give the film-forming primary liquid of the flame retardant functional layer, wherein the mass ratio of Mg(OH).sub.2 to PDMS was about 40:60;

(32) dispersing the mixture of ITO and ATO (ITO:ATO=w1:w2=1:1) into an appropriate amount of ethanol to form a transparent dispersion containing nanoparticles of ITO and ATO; uniformly mixing the transparent dispersion containing nanoparticles of ITO and ATO with PVB and an appropriate amount of aid to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was (ITO and ATO):PVB:aid=5:75:20;

(33) dispersing ZnO nanoparticles into a certain amount of ethanol to form a transparent dispersion containing ZnO nanoparticles; uniformly mixing the transparent dispersion containing ZnO nanoparticles with PVB to give the film-forming primary liquid of the UV-blocking functional layer, wherein the mass ratio of ZnO to PVB was about 5:95;

(34) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of knife coating; then curing at 80;

(35) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of knife coating; then curing at 80;

(36) (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of knife coating; then curing at 80 to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

EXAMPLE 4

(37) (1) dispersing Mg(OH).sub.2 nanoparticles into toluene to form an Mg(OH).sub.2-containing transparent dispersion; uniformly mixing the above obtained Mg(OH).sub.2-containing transparent dispersion with polytrimethylene terephthalate (PPT) and an appropriate amount of aid to give the film-forming primary liquid of the flame retardant functional layer, wherein the mass ratio of Mg(OH).sub.2 to PPT was about 30:70;

(38) dispersing the K.sub.xWO.sub.3 nanoparticles into an appropriate amount of ethanol to form a transparent dispersion containing LaB.sub.6 nanoparticles; fully uniformly stirring the transparent dispersion containing K.sub.xWO.sub.3 nanoparticles with PVB and an appropriate amount of aid to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was K.sub.xWO.sub.3: PVB: aid=5:75:20;

(39) dispersing ZnO nanoparticles into a certain amount of ethanol to form a transparent dispersion containing ZnO nanoparticles; uniformly mixing the transparent dispersion containing ZnO nanoparticles with PVB to give the film-forming primary liquid of the UV-blocking functional layer, wherein the mass ratio of ZnO to PVB was about 5:95;

(40) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of spin coating; then curing under UV light's irradiation;

(41) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of spin coating; then curing under UV light's irradiation;

(42) (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of spin coating; then curing under UV light's irradiation to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

EXAMPLE 5

(43) (1) dispersing Al(OH).sub.3 into an appropriate amount of toluene to form an Al(OH).sub.3-containing transparent dispersion; adding an appropriate amount of PPT and aid to the Al(OH).sub.3-containing transparent dispersion; uniformly stirring and mixing to obtain the film-forming primary liquid of the flame retardant functional layer, wherein the mass ratio of Al(OH).sub.3, PPT and aid was about 28:70:2;

(44) dispersing nano-indium tin oxide ITO into an appropriate amount of ethanol to form an ITO-containing transparent dispersion; uniformly mixing the above ITO-containing transparent dispersion with polyvinyl butyral (PVB) and aid to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was ITO:PVB:aid=5:75:20;

(45) dispersing ZnO nanoparticles into an appropriate amount of ethanol to form a transparent dispersion containing ZnO nanoparticles; uniformly mixing the transparent dispersion containing ZnO nanoparticles with PVB to give the film-forming primary liquid of the UV-blocking functional layer, wherein the ZnO:PVB in the film-forming primary liquid was about 5:95;

(46) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of spray coating; then curing under UV light's irradiation;

(47) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of spray coating; then curing under UV light's irradiation;

(48) (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of spray coating; then curing under UV light's irradiation to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

EXAMPLE 6

(49) (1) dispersing Mg(OH).sub.2 nanoparticles into toluene to form an Mg(OH).sub.2-containing transparent dispersion; fully mixing the above transparent dispersion with polytrimethylene terephthalate to obtain the film-forming primary liquid, wherein the mass ratio of Mg(OH).sub.2 to PPT was about 30:70;

(50) dispersing nano-indium tin oxide (ITO) into an appropriate amount of ethanol to form an ITO-containing transparent dispersion; fully uniformly mixing the above ITO-containing transparent dispersion with polyvinyl butyral PVB and an appropriate amount of aid to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was ITO:PVB:aid=25:65:10;

(51) dispersing ZnO nanoparticles into a certain amount of ethanol to form a transparent dispersion containing ZnO nanoparticles; fully uniformly mixing the transparent dispersion containing ZnO nanoparticles with PVB to give the film-forming primary liquid of the UV-blocking functional layer, wherein the mass ratio of ZnO:PVB was about 20:80;

(52) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of calendering; then curing at 80;

(53) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of calendering; then curing at 80;

(54) (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of calendering; then curing at 80 to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

EXAMPLE 7

(55) (1) dispersing Mg(OH).sub.2 nanoparticles into toluene to form an Mg(OH).sub.2-containing transparent dispersion; fully uniformly mixing the above transparent dispersion with polytrimethylene terephthalate (PPT) and an appropriate amount of aid to obtain the film-forming primary liquid, wherein the mass ratio of Mg(OH).sub.2 to PPT was about 40:60;

(56) dispersing nano-indium tin oxide (ITO) into an appropriate amount of ethanol to form an ITO-containing transparent dispersion; adding polyvinyl butyral (PVB) and aid to the above ITO-containing transparent dispersion; fully stirring and uniformly mixing to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was ITO:PVB:aid=35:55:10;

(57) dispersing ZnO nanoparticles into a certain amount of ethanol to form a dispersion containing ZnO nanoparticles; uniformly mixing the transparent dispersion containing ZnO nanoparticles with PVB to give the film-forming primary liquid of the UV-blocking functional layer;

(58) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of roller painting; then curing at 80;

(59) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (2) by use of roller painting; then curing at 80;

(60) (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of roller painting; then curing at 80 to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

EXAMPLE 8

(61) (1) dispersing Al(OH).sub.3 into an appropriate amount of butyl acetate to form an Al(OH).sub.3-containing transparent dispersion; adding an appropriate amount of PPT and an appropriate amount of aid to the Al(OH).sub.3-containing transparent dispersion; uniformly mixing to obtain the film-forming primary liquid of the flame retardant functional layer, wherein the mass ratio of Al(OH).sub.3, PPT and aid was about 38:60:2;

(62) dispersing the mixture of the nanoparticles of ITO, ATO and WO.sub.3 into an appropriate amount of ethanol, wherein the mass ratio of ITO:ATO:WO.sub.3 was 1.5:1.5:2, to form an transparent dispersion containing the nanoparticles of ITO, ATO and WO.sub.3; adding a certain proportion of PVB and aid to the transparent dispersion containing the above nanoparticles; uniformly mixing to give the film-forming primary liquid of the thermal insulation functional layer, wherein the mass ratio of all the major components was (ITO, ATO, WO.sub.3):PVB:aid=5:75:20;

(63) dispersing ZnO nanoparticles into an appropriate amount of ethanol to form a dispersion containing ZnO nanoparticles; fully uniformly mixing the transparent dispersion containing ZnO nanoparticles with PVB to give the film-forming primary liquid of the UV-blocking functional layer, wherein the mass ratio of all components was ZnO:PVB=10:90;

(64) (2) coating the film-forming primary liquid of the flame retardant functional layer obtained from step (1) onto the PET substrate by use of extrusion molding; then curing at 80;

(65) (3) coating the film-forming primary liquid of the thermal insulation functional layer obtained from step (1) onto the other side of the substrate in step (4) by use of extrusion molding; then curing at 80;

(66) (4) coating the film-forming primary liquid of the UV-blocking functional layer obtained from step (1) onto the thermal insulation functional layer obtained in step (3) by use of extrusion molding; then curing at 80 to obtain the product transparent flame retardant thermal-insulating UV-blocking high molecular composite film. For the properties thereof, please see Table 1.

(67) TABLE-US-00001 TABLE 1 The properties of the transparent flame retardant thermal-insulating UV-blocking high molecular composite film prepared in Examples 1-8 UV light visible light near-infrared limiting transmittance transmittance transmittance oxygen % 350 nm % 550 nm % 1700 nm index Example 1 0.5624 86.23 8.302 34 Example 2 0.5524 87.03 7.203 33.8 Example 3 0.5438 86.3 7.147 35.2 Example 4 0.5019 85.7 2.057 50.1 Example 5 0.3014 85.9 8.314 48.4 Example 6 0.0396 86.21 7.958 48.6 Example 7 0.4589 84.71 5.634 37.2 Example 8 0.0409 84.14 3.766 34.3

EXAMPLES 9-15

(68) Repeating Example 4, wherein the difference only lay in that: the near-infrared absorbing agent or heat shielding agent was respectively potassium tungsten bronze (K.sub.xWO.sub.3), cesium tungsten bronze (Cs.sub.xWO.sub.3), rubidium tungsten bronze (Rb.sub.xWO.sub.3), potassium cesium tungsten bronze (K.sub.xCs.sub.yWO.sub.3), ammonium tungsten bronze ((NH.sub.4).sub.xWO.sub.3), nano-tungsten oxide (WO.sub.3) or lanthanum hexaboride (LaB.sub.6).

EXAMPLES 16-17

(69) Repeating Example 4, wherein the difference only lay in that: the inorganic nano-UV absorbing agent was respectively silica-coated nano-zinc oxide (ZnO), nano-titanium dioxide (TiO.sub.2).

EXAMPLES 18-23

(70) Repeating Example 4, wherein the difference only lay in that: the high molecular polymer was respectively polyvinyl butyral (PVB), polyvinyl pyrrolidone (PVP), polystyrene (PS), polycarbonate (PC), polyethylene terephthalate (PET) or polyurethane (PU).

EXAMPLES 24-29

(71) Repeating Example 4, wherein the difference only lay in that: the plastic aid was respectively dioctyl phthalate (DOP), dibutyl sebacate (DBS), H88 leveling agent, polyoxyethylene oxypropylene glycerol (GPE), triethylene glycol di-2-ethylhexanoate (3G8) or photoinitiator 184.

(72) Obviously, the above-described examples of the present invention are only examples given to clearly illustrate the present invention, rather than limitations on the embodiment of the present invention. For those skilled, changes or variations in other forms may also be made on the basis of the above descriptions. Here we cannot enumerate all the embodiments. Any apparent change or variation extended from the technical solutions of the present invention is still within the protection scope of the present invention.