Heat mirror film with oxidation resistance, ultraviolet resistance and high heat insulation for hollow glass and preparation method of heat mirror film

Abstract

The invention relates to the technical field of heat insulation films, in particular to an anti-oxidation anti-ultraviolet high-heat-insulation heat mirror film for hollow glass, which sequentially comprises a first anti-oxidation anti-ultraviolet coating, a first base film layer, a functional adhesive layer, a second base film layer, a second anti-oxidation anti-ultraviolet coating and a protective film, wherein the thickness of the functional adhesive layer is 5-50 microns, and the functional adhesive layer comprises an ultraviolet absorbent and / or an infrared absorbent. Through optimal design of the multi-layer composite structure, the functional adhesive layer and the anti-oxidation coating, low hemispherical radiance, high heat insulation, high ultraviolet barrier and membrane surface oxidation resistance are realized, and the hollow glass is suitable for application scenes of high-performance hollow glass.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation films, and in particular to a thermal mirror film for insulating glass with the features of anti-oxidation, anti-ultraviolet and high thermal insulation, and a preparation method thereof. Background Art

[0002] Heat mirror film acts as a heat insulator by reflecting light in the mid- and far-infrared bands; however, current heat mirror film products do not take into account the reduction of light with a wavelength of 760-2500nm to further absorb light in this band to enhance heat isolation, further reduce fossil fuels consumed for cooling / heating, and reduce energy consumption.

[0003] Traditional insulating glass and heat mirror film have less protection against the ultraviolet band, and in actual use, they will cause problems such as film aging, aging of indoor furniture, and ultraviolet damage to personnel.

[0004] CN 102701607 B discloses a method for preparing energy-saving heat mirror film hollow glass. The invention belongs to the field of glass processing technology. A professional laminating process is developed, and the heat stretching process parameters are further adjusted. The process is simple and easy to operate, and the process parameters are easy to control. The problem of uneven film laying during laminating of the heat mirror film, resulting in film wrinkles and aluminum strip dislocation is solved. The heat mirror film has very good stretchability, and its appearance and performance are very good. The invention only uses the heat mirror film to suspend inside the hollow glass and cooperates with the LOW-E coated glass, and does not involve the preparation and improvement process of the heat mirror film itself.

[0005] CN 106517827 B discloses a production process of a two-glass three-cavity heat mirror film hollow glass. The invention relates to a production process of a two-glass three-cavity heat mirror film hollow glass. There are two layers of heat mirror film between two sheets of glass. The weight of the hollow glass with three air layers is much lighter than that of ordinary four-glass three-cavity glass, which can solve the energy-saving problem to a greater extent and reduce the loss of materials (original glass) to a great extent. The three air layers improve the performance of the hollow glass to a greater extent. The invention provides a production process of a two-glass three-cavity heat mirror film hollow glass. By designing and customizing auxiliary tool positioning blocks and fixing rods, the spacing strips are accurately positioned, the construction is convenient, and it is not easy to be misplaced and tilted. By opening a balance hole on the heat mirror film, the air pressure of the hollow cavities on both sides is consistent, eliminating the uneven spreading, edge wrinkles and other phenomena. The invention relates to the modification of glass and heat mirror film, and has made improvements in construction, but does not involve the upgrade and improvement of the performance of the heat mirror film itself.

[0006] CN 217400734 U discloses a patent related to a two-glass three-cavity heat mirror film hollow glass, which belongs to the technical field of hollow glass. The key points of its technical solution are: frame; glass, placed on the frame; heat mirror film, placed on the frame; wherein the glass is provided with two pieces, a hollow cavity is formed between the glass, the heat mirror film is provided with two pieces, the heat mirror film is placed in the hollow cavity, the periphery of the heat mirror film is provided with a fixed frame, the fixed frame is provided with a T-shaped portion, the frame is provided with a T-shaped groove adapted to the T-shaped portion, the T-shaped portion is provided with a connecting portion, the connecting portion is provided with a threaded hole, the frame is provided with a mounting seat with the same axis as the threaded hole, and the mounting seat is provided with a threaded connector adapted to the threaded hole. The present application provides a hollow glass, which improves the installation stability between the heat mirror film and the frame, and improves the convenience of installing the heat mirror film. This invention relates to improvements in the installation of heat mirror film, and has made improvements in the overall installation, but does not involve upgrades and improvements in the performance of the heat mirror film itself, and there is no performance improvement.

[0007] CN 215152636 U discloses a heat-insulating laminated glass with a heat mirror film layer. In the invention, a first PVB film is fixedly connected to the top of the glass body, a glass base layer is fixedly connected to the top of the glass base layer, a low-reflection film layer is fixedly connected to the top of the low-reflection film layer, a damping adhesive layer is fixedly connected to the top of the damping adhesive layer, a high-reflection film layer is fixedly connected to the top of the high-reflection film layer, a second PVB film is fixedly connected to the top of the second PVB film, a PC board layer is fixedly connected to the top of the PC board layer, a heat insulation layer is fixedly connected to the top of the heat insulation layer, a heat mirror film layer is fixedly connected to the top of the heat mirror film layer, and a corrosion-resistant layer is fixedly connected to the top of the heat mirror film layer. The patent has the advantages of simple structure, good heat and sound insulation effect, explosion-proof, UV protection and corrosion resistance, etc., prolongs the service life of the glass, and meets the needs of users. The invention involves the improvement of the overall performance of the glass, and increases some product toughness by adding a multi-layer adhesive structure and a film layer, but does not involve the upgrade and improvement of the performance of the heat mirror film itself, especially the improvement of the heat insulation effect, and one of the key functions has not been improved.

[0008] CN 208497864 U discloses a utility model patent for a heat-insulating colored crystal laminated glass with a heat mirror film layer. The utility model provides a heat-insulating colored crystal laminated glass with a heat mirror film layer, comprising a glass base layer A and a glass base layer B, wherein a low-reflection film layer, a damping adhesive layer A, a PC board layer, a damping adhesive layer B, and a high-reflection film layer are sequentially bonded and arranged between the glass base layer A and the glass base layer B from top to bottom, a heat mirror film layer is bonded and arranged on the lower surface of the glass base layer B, a plurality of silicon dioxide particles are bonded and arranged in the damping adhesive layer A; a plurality of perlite particles are bonded and arranged in the damping adhesive layer B; a printed decorative layer is bonded and arranged on the upper surface of the glass base layer A, a heat mirror film layer is bonded and arranged on the lower surface of the glass base layer B, and a plurality of perlite particles are bonded and arranged in the damping adhesive layer B, so that the glass has good heat insulation function; a plurality of silicon dioxide particles are bonded and arranged in the damping adhesive layer A, so that the glass has fireproof performance and improves the safety factor of the glass. Summary of the invention

[0009] The purpose of the present invention is to provide a heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation and a preparation method thereof. The heat mirror film is suspended inside the insulating glass and is filled with protective gas. It is easy to construct and will not oxidize during the construction process. The hemispherical emissivity and heat insulation effect are equivalent to those of general heat mirror glass and heat mirror suspended film insulating glass. The ultraviolet blocking rate reaches more than 99%, the infrared blocking rate reaches more than 90%, and the heat transfer coefficient (K) and hemispherical emissivity (ε), mid- and far-infrared reflectivity are lower than those of ordinary insulating glass and LOW-E glass.

[0010] The above technical objectives of the present invention are achieved through the following technical solutions:

[0011] The invention provides a heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation, which comprises in sequence: a first anti-oxidation and anti-ultraviolet coating, a first base film layer, a functional adhesive layer, a second base film layer, a second anti-oxidation and anti-ultraviolet coating and a protective film;

[0012] Wherein, the functional adhesive layer has a thickness of 5 to 50 μm and contains an ultraviolet absorber and / or an infrared absorber.

[0013] Furthermore, the first base film and / or the second base film layer comprises a surface magnetron sputtering layer, a vacuum evaporation layer or a dyeing layer. Furthermore, in the first base film layer and the second base film layer, the magnetron sputtering layer, the vacuum evaporation layer or the dyeing layer has a thickness of 2 to 20 nm.

[0014] Furthermore, the thickness of the first base membrane layer and the second base membrane layer is 16 to 188 μm.

[0015] Furthermore, the thickness of the first anti-oxidation and anti-ultraviolet coating and the second anti-oxidation and anti-ultraviolet coating is 0.5-10 μm.

[0016] Furthermore, the infrared absorber is one or more of acridine dye, benzothiophene dye, cesium tungsten bronze, tungsten oxide or tungsten oxide derivatives.

[0017] Furthermore, the ultraviolet absorber is one or more of benzotriazole, phenyl o-hydroxybenzoate, dihydroxybenzophenone or n-octyloxybenzophenone.

[0018] Furthermore, the film surface metal layer includes any one of Ag, Au, Ti, Si, Ni, Nb, Co, Cr, Sn, Sb or their nitrides or oxides.

[0019] Furthermore, the heat transfer coefficient K value of the heat mirror film is 1.5 to 2.6.

[0020] The present invention also provides a method for preparing a heat mirror film for insulating glass having the characteristics of anti-oxidation, anti-ultraviolet and high heat insulation, comprising the following steps:

[0021] Compounding the first base film and the uncoated surface of the second base film by coating with a composite adhesive, and light curing or heat curing to obtain a primary product;

[0022] One side of the primary product is coated with a first anti-oxidation and anti-ultraviolet coating, and after light curing or heat curing, a protective film is compounded on the coating surface to obtain a secondary product;

[0023] A second anti-oxidation and anti-ultraviolet coating is applied on the side of the secondary product away from the protective film, and the secondary product is rolled up after light curing or heat curing.

[0024] In summary, the present invention has the following beneficial effects:

[0025] After ordinary hollow glass is used with the film provided by the present invention, the heat insulation and energy-saving performance is greatly improved, the modification process is simple, the construction is easy, it can adapt to more glass sizes, has low cost and energy consumption, is environmentally friendly and low-carbon, and is more economical and practical. Compared with the existing heat mirror suspended film glass, it has a better infrared blocking rate and better heat insulation effect. The introduction of the anti-oxidation coating improves the service life of the product and slows down the oxidation aging rate without basically changing the heat transfer coefficient and hemispherical emissivity. In addition, compared with ceramic insulation film and magnetron sputtering insulation film, it has a lower heat transfer coefficient and hemispherical emissivity, the product structure is adjustable, and it is suitable for northern and southern environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the heat mirror film structure of embodiments 1 to 3 of the present invention.

[0027] Reference numerals

[0028] 1. The first anti-oxidation and anti-ultraviolet coating, 2. The first base film layer, 3. The functional adhesive layer, 4. The first base film layer, 5. The second anti-oxidation and anti-ultraviolet coating, 6. The protective film. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, a heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation and a preparation method thereof proposed in accordance with the present invention, its specific implementation method, characteristics and effects are described in detail as follows.

[0030] The present specific embodiment provides a heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation, which comprises in sequence: a first anti-oxidation and anti-ultraviolet coating, a first base film layer (containing a metal layer), a functional adhesive layer, a first base film layer (containing a metal layer), a second anti-oxidation and anti-ultraviolet coating, and a protective film.

[0031] Wherein, the functional adhesive layer has a thickness of 5 to 50 μm and contains an ultraviolet absorber and / or an infrared absorber.

[0032] It is understandable that the heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation performance provided by this specific embodiment shows excellent functional characteristics through the optimized design of the multi-layer structure. First, the first and second anti-oxidation and anti-ultraviolet coatings can effectively improve the surface hardness of the heat mirror film, while preventing oxidation and ultraviolet aging and yellowing, and extending the service life. The first and second base film layers give the film material excellent infrared reflection performance, thereby achieving efficient heat insulation effect and significantly reducing heat conduction. The design of the functional adhesive layer is particularly critical, and its thickness is controlled at 5 to 50 μm. The ultraviolet absorber and / or infrared absorber added inside can effectively absorb ultraviolet rays and part of the infrared radiation, further improving the heat insulation and anti-ultraviolet ability, while avoiding ultraviolet damage to the film material and the indoor environment. The protective film protects the integrity of the entire structure before use, ensuring the integrity of the coating before winding and use. Through this multi-layer synergy, the heat mirror film not only provides high heat insulation performance, but also has excellent anti-oxidation and anti-ultraviolet capabilities, providing excellent energy-saving, environmental protection and durability solutions for the application field of insulating glass.

[0033] Furthermore, the thickness of the metal layer on the surface of the first base film layer and the second base film layer is 2 to 20 nm.

[0034] Furthermore, the thickness of the first base membrane layer and the second base membrane layer is 16 to 188 μm.

[0035] Furthermore, the thickness of the first anti-oxidation and anti-ultraviolet coating and the second anti-oxidation and anti-ultraviolet coating is 0.5-10 μm.

[0036] Furthermore, the infrared absorber is one or more of acridine dye, benzothiophene dye, cesium tungsten bronze, tungsten oxide or tungsten oxide derivatives.

[0037] Understandably, these materials have significant advantages in infrared absorption and thermal insulation performance. Acridine dyes and benzothiophene dyes, with their excellent spectral selectivity, can efficiently absorb infrared rays in a specific wavelength range while maintaining low visible light absorption, thereby ensuring that the heat mirror film does not affect light transmittance while achieving heat insulation. Cesium tungsten bronze, tungsten oxide and their derivatives have adjustable broadband infrared absorption capabilities due to their nanostructures, which can not only efficiently shield infrared thermal radiation, but also have excellent light stability. The synergistic effect of these infrared absorbers not only further enhances the thermal insulation performance of the heat mirror film, but also maintains good transparency and long-term stability, providing a strong guarantee for the energy-saving and environmental protection performance of insulating glass, while improving the thermal management efficiency of the overall structure.

[0038] Furthermore, the ultraviolet absorber is one or more of benzotriazole, phenyl o-hydroxybenzoate, dihydroxybenzophenone or n-octyloxybenzophenone.

[0039] It is understandable that the ultraviolet absorber used in the present embodiment includes one or more of benzotriazole, phenyl o-hydroxybenzoate, dihydroxybenzophenone or n-octyloxybenzophenone, and these ultraviolet absorbers show excellent effects in blocking ultraviolet radiation. Benzotriazole can effectively reduce the photodegradation of ultraviolet rays to materials through its high-efficiency ultraviolet absorption characteristics, and has excellent chemical stability and weather resistance. Phenyl o-hydroxybenzoate and dihydroxybenzophenone can absorb ultraviolet rays of a wide range of bands through their unique molecular structures, especially showing extremely high absorption efficiency in the short-wave ultraviolet region, and the photochemical stability between their molecules can significantly extend the service life of the film material. And n-octyloxybenzophenone can be evenly distributed in the coating due to its fat-soluble characteristics, improving the durability and ultraviolet shielding performance of the film material. The synergistic effect of these ultraviolet absorbers can not only effectively prevent ultraviolet rays from eroding the heat mirror film, reduce the aging and yellowing of the material, but also protect the indoor environment from ultraviolet damage, thereby significantly improving the anti-ultraviolet performance and service life of the heat mirror film, and providing a more excellent light protection function for insulating glass.

[0040] It is understandable that in the process of compounding high-hardness coatings, antioxidant and anti-ultraviolet coatings, and coatings with different refractive indices, it is necessary to design and optimize the combination and thickness ratio of the coatings according to the performance and target function of the selected magnetron sputtering materials to achieve the best optical performance, mechanical performance and durability. The core of the compounding process is to make full use of the characteristics of each coating for synergistic cooperation. For example, the high-hardness coating, based on its excellent wear resistance and mechanical strength, can effectively improve the protective performance of the thermal mirror film while protecting the internal layer structure from external physical damage. The antioxidant and anti-ultraviolet coating can effectively resist the erosion of oxygen, water vapor, ultraviolet rays and other oxidizing substances in the environment through its chemical stability, and extend the service life of the film material. On this basis, coatings with different refractive indices (high refractive index and low refractive index materials) can optimize the optical interference effect, reduce visible light reflection, improve light transmittance, and enhance the thermal insulation effect through alternating compounding.

[0041] The core principle of compounding is to test and verify the optimal thickness and ratio based on the optical constants of the material (such as refractive index n and extinction coefficient k) and physical stability to ensure that the overall film layer has both durability and environmental adaptability while meeting optical requirements. In the experimental stage, the compounding scheme was adjusted by measuring the refractive index, hardness, chemical stability and other parameters of various coating materials. Subsequently, the actual performance of the compounded layer was further verified through machine experiments, including indicators such as transmittance, infrared reflectivity, oxidation resistance and wear resistance.

[0042] The formula for the thickness and ratio of the first anti-oxidation and anti-ultraviolet coating and the second anti-oxidation and anti-ultraviolet coating is as follows:

[0043]

[0044] P represents the overall performance of the film layer, which represents the weighted value of the comprehensive performance;

[0045] How to obtain: Through experiments or simulation calculations, the key performance test data such as optical properties (transmittance, reflectivity, etc.), mechanical properties, antioxidant and anti-ultraviolet properties (oxidation rate, ultraviolet aging speed, corrosion resistance, etc.) are comprehensively weighted to obtain the target value.

[0046] i represents the number of coating layers, indicating the i-th film.

[0047] k i is the weight coefficient;

[0048] According to specific application requirements, the weight k opt , k mech , k oxid The allocation is determined by experiments or numerical simulations and can be allocated according to performance requirements. For example, when the optical performance accounts for a high proportion, k is increased. opt , when weather resistance is high, increase koxid ;

[0049] d i represents the film thickness of the i-th layer,

[0050] Acquisition method: Calculated by a film thickness measuring instrument (such as an ellipsometer, an interferometer) or by magnetron sputtering process parameters (target deposition rate and time);

[0051] F i represents the functional factor of the i-th layer;

[0052] Functional factors include the following specific indicators: optical performance factor (refractive index nn), measured by ellipsometer to measure the refractive index of the material or refer to the material manual;

[0053] Mechanical property factor (hardness H), unit: GPa, the hardness of the film is directly tested by a nanoindenter or hardness tester;

[0054] Antioxidant performance factor (oxidation rate O), unit: (mg / cm 2 h); measure the amount of oxide layer generated per unit time through accelerated aging tests (such as damp heat test, salt spray test);

[0055] k opt Optical performance weights convert optical performance requirements (such as high transmittance and low reflectivity) into weight values ​​through simulation optimization or experimental design.

[0056] k mech : Mechanical property weight, according to the scratch resistance and wear resistance requirements of the film layer, weights are allocated through experimental test results and needs;

[0057] k oxid :The weight of antioxidant performance is verified through experiments (such as antioxidant performance test, accelerated aging test), and the corresponding weight is assigned based on the demand for antioxidant performance in the target application.

[0058] Here, ratio = single layer thickness / overall thickness × 100%.

[0059] Furthermore, the magnetron sputtering layer of the magnetron sputtering film includes any one of Ag, Au, Ti, Si, Ni, Nb, Co, Cr, Sn, Sb or their nitrides or oxides.

[0060] Furthermore, the heat transfer coefficient K value of the heat mirror film is 1.5 to 2.6.

[0061] The present invention also provides a method for preparing a heat mirror film for insulating glass having the characteristics of anti-oxidation, anti-ultraviolet and high heat insulation, comprising the following steps:

[0062] Compounding the first base film and the uncoated surface of the second base film by coating with a composite adhesive, and light curing or heat curing to obtain a primary product;

[0063] One side of the primary product is coated with a first anti-oxidation and anti-ultraviolet coating, and after light curing or heat curing, a protective film is compounded on the coating surface to obtain a secondary product;

[0064] A second anti-oxidation and anti-ultraviolet coating is applied on the side of the secondary product away from the protective film, and the secondary product is rolled up after light curing or heat curing.

[0065] The present invention will be further described below in conjunction with specific embodiments.

[0066] Example 1

[0067] This embodiment 1 provides a heat mirror film for insulating glass containing metallic silver, which has the characteristics of anti-oxidation, anti-ultraviolet and high heat insulation. Figure 1 , the specific structure and thickness of the thermal insulation film:

[0068] The first anti-oxidation and anti-UV coating: 4μm (using light-curing acrylic compound resin to provide high hardness and anti-oxidation and anti-UV properties).

[0069] Aluminum-plated first base film layer: 36μm (provides infrared reflection effect)

[0070] Functional adhesive layer: 25μm (doped with 2% cesium tungsten bronze nanoparticles to improve infrared absorption, and contains benzotriazole as a UV absorber).

[0071] Aluminum-plated second base film layer: 36μm (provides infrared reflection effect)

[0072] Second anti-oxidation and anti-UV coating: 4μm (photocuring acrylic compound resin).

[0073] Protective film: 23μm (polyester material, to protect the integrity of the film layer before use).

[0074] Preparation method of the above thermal insulation film:

[0075] S1. Functional adhesive layer coating: prepare a functional adhesive solution doped with 2% cesium tungsten bronze and 0.5% benzotriazole, and evenly coat it on the back of the first base film and the second base film with a thickness of 25 μm. After the adhesive layer is thermally cured, the two base films are composited;

[0076] S2. Anti-oxidation and anti-ultraviolet coating: 4 μm of anti-oxidation and anti-ultraviolet coating is applied on the front of the composite film, and the composite protective film is formed after light / heat curing to obtain a secondary product;

[0077] S3, second anti-oxidation and anti-ultraviolet coating: apply 4μm anti-oxidation coating (compounded with light-curing acrylic resin) on the side of the secondary product away from the protective film, and roll it up after light / heat curing;

[0078] Material properties: infrared reflectivity: 85%; UV blocking rate: 98%; thermal conductivity (K value): 1.7;

[0079] Example 2

[0080] This embodiment 2 provides a heat mirror film for insulating glass containing cesium tungsten bronze and tungsten oxide, which has the characteristics of anti-oxidation, anti-ultraviolet and high heat insulation. Figure 1 , the specific structure and thickness of the thermal insulation film:

[0081] The first anti-oxidation and anti-UV protective coating: 3μm; compounded with light-curing resin, it provides high hardness and anti-oxidation and anti-UV properties while enhancing mechanical durability.

[0082] The first base film layer (magnetron sputtering single-layer silver material): 50μm (provides infrared reflection effect)

[0083] Functional adhesive layer: 30μm, containing 1.5% tungsten oxide (WO3) nanoparticles and cesium tungsten bronze (Cs 0.3 WO3), 1% phenyl o-hydroxybenzoate (ultraviolet absorber), enhances ultraviolet absorption ability and improves infrared blocking effect.

[0084] Second base film layer (magnetron sputtering single-layer silver material): 50μm (provides infrared reflection effect)

[0085] First anti-oxidation and anti-ultraviolet coating: coating the front of the composite film with a 3 μm anti-oxidation and anti-ultraviolet coating, and then curing the composite protective film with light / heat to obtain a secondary product;

[0086] Second anti-oxidation and anti-ultraviolet coating: Apply 3μm anti-oxidation coating (compounded with light-curing acrylic resin) on the side of the secondary product away from the release film, and roll it up after light / heat curing;

[0087] Protective film: 40μm, made of polypropylene (PP), to protect the integrity of the overall coating structure before use.

[0088] The preparation method of the above thermal insulation film is as follows:

[0089] S1, prepare a functional adhesive containing 1.5% tungsten oxide nanoparticles and 1% phenyl o-hydroxybenzoate, evenly apply it on the back of the first base film and the second base film with a thickness of 30 μm, and compound the two base films after the adhesive layer is thermally cured;

[0090] S2. Anti-oxidation and anti-ultraviolet coating: 3 μm of anti-oxidation and anti-ultraviolet coating is applied on the front of the composite film, and the composite protective film is formed after light / heat curing to obtain a secondary product;

[0091] S3, second anti-oxidation and anti-ultraviolet coating: apply 4μm anti-oxidation coating (compounded with light-curing acrylic resin) on the side of the secondary product away from the protective film, and roll it up after light / heat curing;

[0092] Material properties: infrared reflectivity: 90%; UV blocking rate: 99%; thermal conductivity (K value): 1.6;

[0093] Example 3

[0094] This embodiment 3 provides a heat mirror film for insulating glass containing double silver magnetron layers of cesium tungsten bronze and tungsten oxide and having anti-oxidation, anti-ultraviolet and high heat insulation properties, such as Figure 1 , the specific structure and thickness of the thermal insulation film:

[0095] The first anti-oxidation and anti-ultraviolet coating: 1.5μm, compounded with two or more photocurable resins, provides high hardness, anti-oxidation and anti-ultraviolet properties;

[0096] The first base film layer (magnetron sputtering double-layer silver material): 46μm (provides infrared reflection effect)

[0097] Functional adhesive layer: 50μm, containing 1.5% n-octyloxybenzophenone (UV absorber) and 4% cesium tungsten bronze and tungsten oxide (particle size 30nm), to enhance UV absorption performance and infrared absorption function.

[0098] Second base film layer (magnetron sputtering single-layer silver material): 46μm (provides infrared reflection effect)

[0099] Second anti-oxidation and scratch-resistant protective coating: 1.5μm, using light-cured acrylic resin coating to enhance mechanical properties and anti-oxidation ability.

[0100] Release film: 50μm, polyethylene (PE) material, to protect the overall coating structure.

[0101] The preparation method of the above thermal insulation film is as follows:

[0102] S1, evenly coating a functional adhesive containing 1.5% n-octyloxybenzophenone (ultraviolet absorber) and 4% cesium tungsten bronze and tungsten oxide (particle size 30nm) on the back of the first base film and the second base film with a thickness of 50μm, and compounding the two base films after the adhesive layer is thermally cured;

[0103] S2. Anti-oxidation and anti-ultraviolet coating: 1.5 μm anti-oxidation and anti-ultraviolet coating is applied on the front of the composite film, and a composite protective film is formed after light / heat curing to obtain a secondary product;

[0104] S3, second anti-oxidation and anti-ultraviolet coating: apply 1.5 μm anti-oxidation coating (compounded with light-curing acrylic resin) on the side of the secondary product away from the protective film, and roll it up after light / heat curing;

[0105] Material properties: infrared reflectivity: 91%; UV blocking rate: 99%; thermal conductivity coefficient (K value): 1.5;.

[0106] Comparative Example 1

[0107] Specific structure and thickness of thermal insulation film:

[0108] The first anti-oxidation and scratch-resistant protective coating: 1μm, single-layer silicon dioxide (SiO2), provides basic anti-oxidation and mechanical protection, but the thickness is thin and the scratch resistance is limited;

[0109] First magnetron sputtered film Magnetron sputtered layer: 10nm, single layer of silver (Ag), providing basic infrared reflection performance, but no enhanced optical adjustment or protection measures;

[0110] The first magnetron sputtering film base film layer: 25μm, single layer of silicon dioxide (SiO2), provides basic optical transmittance, but has limited UV blocking ability;

[0111] Functional adhesive layer: 30μm, ordinary acrylic adhesive, no functional particles or absorbents added, only provides bonding function, no heat insulation or UV absorption ability.

[0112] Second magnetron sputtering film base film layer: 25μm, single layer of silicon dioxide (SiO2), same as the first base film layer, single optical properties, lack of multifunctional properties;

[0113] Second magnetron sputtering film: magnetron sputtering layer: 10 nm, single layer of silver (Ag), providing basic infrared reflection performance, similar to the first magnetron sputtering film;

[0114] Second anti-oxidation and scratch-resistant protective coating: 1μm, single layer of silicon dioxide (SiO2), provides basic protection, with limited anti-scratch and anti-oxidation performance;

[0115] Release film: 30μm, ordinary polypropylene (PP, only used for protective coating, no other additional functions.

[0116] The preparation method is the same as that of Example 1.

[0117] Thermal insulation film performance test: infrared reflectivity: 75%; UV blocking rate: 85%; thermal conductivity coefficient (K value): 2.5, scratch resistance: poor, easy to scratch, weather resistance: average antioxidant performance, the film layer changed color after the wet heat test.

[0118] Comparative Example 2

[0119] Specific structure and thickness of thermal insulation film:

[0120] The first anti-oxidation and scratch-resistant protective coating: 2μm, titanium oxide (TiO2), provides medium hardness and anti-oxidation performance, but weak mechanical protection ability;

[0121] The first magnetron sputtering film magnetron sputtering layer: 8nm, single layer of indium tin oxide (ITO), provides inefficient infrared reflection performance and general heat insulation effect;

[0122] The first magnetron sputtering film base film layer: 30μm, single layer of zinc oxide (ZnO), has a certain optical transmittance, but insufficient UV blocking ability;

[0123] Functional adhesive layer: 25μm, ordinary thermosetting adhesive, without functional particles. Only provides bonding performance, no UV absorption or heat insulation enhancement function;

[0124] The second magnetron sputtering film base film layer: 30μm, zinc oxide (ZnO), has certain optical adjustment performance, but single function;

[0125] Second magnetron sputtering film magnetron sputtering layer: 8nm, single layer of indium tin oxide (ITO), limited thermal insulation performance, low infrared reflectivity;

[0126] Second anti-oxidation and scratch-resistant protective coating: 2μm, titanium dioxide (TiO2), provides certain anti-oxidation and wear resistance, but the protective effect is not significant enough;

[0127] Release film: 30μm, ordinary polyester (PET), protects the integrity of the film layer, but has no additional functions.

[0128] The preparation method is the same as that of Example 1

[0129] Thermal insulation film performance test: infrared reflectivity: 80%; UV blocking rate: 88%; thermal conductivity (K value): 2.2; scratch resistance: medium; weather resistance: after the wet heat test, the oxide layer was slightly damaged.

[0130] Performance Testing

[0131] The performance test results of Examples 1 to 3 and Comparative Examples 1 to 2 are as follows:

[0132] Performance Indicators Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Infrared reflectivity 85％ 90％ 91％ 75％ 80％ UV blocking rate 98％ 99％ 99％ 85％ 88％ Thermal conductivity (K value) 1.7 1.6 1.5 2.5 2.2 Scratch resistance (hardness) 3H 3H 3H 2H 2H Weather resistance (humidity and heat test) Excellent Excellent Excellent Obvious discoloration Minor damage

[0133] The above test results show that:

[0134] 1. Infrared reflectivity

[0135] Examples 1-3: High infrared reflectivity, Example 2 (90%) performs best because it uses a composite structure of cesium tungsten bronze and tungsten oxide to enhance infrared absorption and reflection capabilities. Examples 1 and 3 are slightly inferior, but still significantly better than the comparative examples. Comparative Examples 1-2: Low infrared reflectivity, the single-layer silver film used in Comparative Example 1 (75%) is simple in design and has poor heat insulation effect; Comparative Example 2 is slightly improved (80%), but still lower than the examples.

[0136] 2. UV blocking rate

[0137] Examples 1-3: The UV blocking rate is very high, all above 97%, which is due to the multi-layer UV absorption design and the addition of functional particles (such as benzotriazole and n-octyloxybenzophenone) to enhance the UV shielding performance. Example 2 (99%) is slightly better because zinc oxide and silicon nitride are used in the composite layer to increase the UV blocking ability. Comparative Examples 1-2: The UV blocking ability is obviously insufficient, especially Comparative Example 1 (85%), which has no UV absorber design with a functional adhesive layer, and a single material cannot effectively shield ultraviolet rays. Comparative Example 2 (88%) is slightly improved, but still does not meet the high performance requirements.

[0138] 3. Thermal conductivity (K value)

[0139] Examples 1-3: The thermal conductivity coefficient is low, all between 1.5 and 1.7, and the thermal insulation effect is significant. Example 3 (1.5) performs best, thanks to the use of a double silver magnetron structure and an ultra-thin anti-oxidation protective layer, which reduces the coating's overall hemispherical emissivity and infrared reflectivity. Comparative Examples 1-2: The thermal conductivity coefficient is relatively high, and the thermal insulation performance of the single-layer silver film and simple structure used in Comparative Example 1 (2.5) is poor; Comparative Example 2 (2.2) has a slight improvement, but does not meet the energy-saving effect requirements.

[0140] 4. Protectiveness (hardness)

[0141] Examples 1 to 3: The scratch resistance is excellent, with a hardness of 3H, all thanks to the use of an anti-oxidation and scratch-resistant protective coating (such as a composite light-curing acrylic resin coating).

[0142] 5. Weather resistance (humidity and heat test)

[0143] Examples 1-3: Excellent weather resistance, due to the application of the anti-oxidation coating, the film layer did not show obvious discoloration or performance degradation under hot and humid conditions. Comparative Examples 1-2: Comparative Example 1 has the worst weather resistance, discoloration occurred in the hot and humid test, and the film layer aged; Comparative Example 2 has improved, but still does not reach the level of the examples.

[0144] In summary, Examples 1 to 3 have excellent comprehensive performance, showing excellent performance in infrared reflection, ultraviolet blocking, heat conduction, light transmittance, scratch resistance and weather resistance. Example 3 performs best, especially in thermal insulation performance (low thermal conductivity coefficient) and scratch resistance (high hardness). Comparative Examples 1 to 2 have obviously insufficient performance, especially Comparative Example 1, which has low infrared reflectivity and ultraviolet blocking performance due to the single material design, and high thermal conductivity coefficient, and poor thermal insulation effect. Comparative Example 2 has been improved, but the functional design is still relatively simple and cannot match the examples.

[0145] The present invention achieves high heat insulation, high UV blocking and excellent protection through the optimized design of multi-layer composite structure, functional adhesive layer and anti-oxidation coating, and is suitable for the application scenarios of high-performance insulating glass. In the comparative example, due to the single material selection and simple design, various performance indicators cannot meet the requirements of high efficiency, energy saving and durability, and the scope of application is limited.

[0146] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been presented as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation, characterized in that: The sequence includes: the sequence includes: a first anti-oxidation and anti-ultraviolet coating, a first base film layer, a functional adhesive layer, a second base film layer, a second anti-oxidation and anti-ultraviolet coating and a protective film; Wherein, the functional adhesive layer has a thickness of 5 to 50 μm and contains an ultraviolet absorber and / or an infrared absorber.

2. The heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to claim 1, characterized in that: The thickness of the first base film layer and the second base film layer is 16 to 188 μm.

3. The heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to claim 2, characterized in that: The first base film and / or the second base film layer comprises a surface magnetron sputtering layer, a vacuum evaporation layer or a dyeing layer.

4. The heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to claim 3, characterized in that: In the first base film layer and the second base film layer, the thickness of the magnetron sputtering layer, the vacuum evaporation layer or the dyeing layer is 2 to 20 nm.

5. The heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to claim 1, characterized in that: The thickness of the first anti-oxidation and anti-ultraviolet coating and the second anti-oxidation and anti-ultraviolet coating is 0.5-10 μm.

6. The heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to claim 1, characterized in that: The infrared absorber is one or more of acridine dye, benzothiophene dye, cesium tungsten bronze, tungsten oxide or tungsten oxide derivatives.

7. The heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to claim 1, characterized in that: The ultraviolet absorber is one or more of benzotriazole, phenyl o-hydroxybenzoate, dihydroxybenzophenone or n-octyloxybenzophenone.

8. The heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to claim 1, characterized in that: The coating of the metal coating film in the base film includes any one of Ag, Au, Nb, Ti, Si, Ni, Co, Cr, Sn, Sb or their nitrides or oxides.

9. A heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation according to any one of claims 1 to 9, characterized in that: The heat transfer coefficient K value of the heat mirror film is 1.5 to 2.

6.

10. The method for preparing a heat mirror film for insulating glass with anti-oxidation, anti-ultraviolet and high heat insulation properties according to claim 9, characterized in that: The steps include: Compounding the first base film and the uncoated surface of the second base film by coating with a composite adhesive, and light curing or heat curing to obtain a primary product; One side of the primary product is coated with a first anti-oxidation and anti-ultraviolet coating, and after light curing or heat curing, a protective film is compounded on the coating surface to obtain a secondary product; A second anti-oxidation and anti-ultraviolet coating is applied on the side of the secondary product away from the protective film, and the secondary product is rolled up after light curing or heat curing.

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