Dimming assembly, preparation method therefor and use thereof

Abstract

Provided in the present invention is a dimming assembly, comprising a first transparent substrate, a first adhesive interlayer, a dimming film, a second adhesive interlayer and a second transparent substrate which are successively stacked, wherein the first adhesive interlayer and / or the second adhesive interlayer are / is a composite adhesive film of an adhesive film A and an adhesive film B; and the adhesive film A comprises PVB or EVA, and the adhesive film B comprises POE or TPO. Also provided in the present application are a method for preparing a dimming assembly and the use thereof. A composite adhesive film of an adhesive film A and an adhesive film B is introduced in the dimming assembly provided by the present application. By means of the synergistic effect of PVB or EVA of the adhesive film A and POE or TPO of the adhesive film B, good adhesion between the adhesive film A and the transparent substrate, good adhesion between the adhesive film B and the dimming film, and a good water vapor barrier performance of the composite adhesive film are achieved, thus meeting the water vapor barrier requirements and mechanical performance requirements of the dimming assembly and expanding the application scenarios of the dimming assembly.

Description

A dimming component, its preparation method and its application Technical Field

[0001] This invention relates to the field of light control device technology, and in particular to a dimming component, its preparation method and its application. Background Technology

[0002] A dimming assembly is a light control device, primarily consisting of a dimming film placed between two transparent substrates. These dimming films include suspended particle (SPD) dimming films, polymer-dispersed liquid crystal (PDLC) dimming films, electrochromic (EC) dimming films, thermochromic (TC) dimming films, and photochromic (PC) dimming films. Dimming assemblies made using suspended particle dimming films, polymer-dispersed liquid crystal dimming films, and electrochromic dimming films are respectively called suspended particle dimming assemblies, polymer-dispersed liquid crystal dimming assemblies, and electrochromic dimming assemblies. When an electric current is applied to a suspended particle dimming assembly, polymer-dispersed liquid crystal dimming assembly, or electrochromic dimming assembly, the arrangement or state of the active materials in the dimming film changes, thereby altering the light transmittance characteristics of the dimming assembly, such as changing from low transmittance to high transmittance, or from high transmittance to low transmittance. These dimming components, which achieve rapid switching between light-transmitting and light-blocking states through the action of electric fields / currents, have the advantages of actively regulating light transmittance and energy saving. These components can be used as smart windows, rearview mirrors, sunglasses, displays, etc. in spacecraft, high-speed trains, automobiles, buildings, etc.

[0003] The fabrication of suspended particle dimming components, polymer-dispersed liquid crystal dimming components, and electrochromic dimming components typically utilizes PVB (Polyvinyl butyral interlayer) or EVA (Ethylene-vinyl acetate) films, which are used in the production of laminated glass. However, the poor water-blocking properties of PVB or EVA films make the dimming film at the edges of the dimming component susceptible to degradation and failure due to environmental moisture, resulting in substandard product performance. To address this issue, the current common practice is to reduce the size of the dimming film and leave a larger space around the dimming component. This means a larger overlap between the corresponding edges of the dimming film and the first transparent substrate, second transparent substrate, first interlayer, and second interlayer, thus preventing environmental moisture from penetrating into the dimming film. However, this results in a lack of dimming functionality within a width of several centimeters around the dimming component, thereby limiting its application scenarios.

[0004] Therefore, there is a need to provide a better film material that can not only meet the adhesion requirements of dimming components, but also prevent the dimming film around the dimming components from deteriorating or failing due to moisture in the environment, thereby reducing the area without dimming function at the edge of the dimming components and expanding the application scenarios of dimming components.

[0005] Summary of the Invention

[0006] The technical problem solved by this invention is to provide a dimming component. The dimming component provided by this application has good adhesion and dimming performance, and also achieves high temperature and high humidity aging stability.

[0007] In view of this, this application provides a dimming component, including:

[0008] A first transparent substrate, a second transparent substrate, and a dimming film disposed between the first transparent substrate and the second transparent substrate;

[0009] A first adhesive layer is provided between the first transparent substrate and the dimming film, and / or a second adhesive layer is provided between the second transparent substrate and the dimming film;

[0010] The first adhesive layer and / or the second adhesive layer are composite adhesive films of adhesive film A and adhesive film B;

[0011] The A film in the first interlayer is close to the end of the first transparent substrate, and the B film in the first interlayer is close to the end of the dimming film;

[0012] And / or, the A film in the second interlayer is close to the end of the second transparent substrate, and the B film in the second interlayer is close to the end of the dimming film;

[0013] The A film includes PVB or EVA, and the B film includes POE or TPO.

[0014] Preferably, the thickness of the first adhesive layer and / or the second adhesive layer is 0.1 mm to 2 mm.

[0015] Preferably, the thickness of the A film is 10-60% of the total thickness of the composite film, and the thickness of the B film is 40-90% of the total thickness of the composite film.

[0016] Preferably, the first transparent substrate and the second transparent substrate have the same size, the size of the dimming film is smaller than the size of the first transparent substrate and the second transparent substrate, and at least one end of the dimming film has an overlap region with the corresponding position of the first transparent substrate and the second transparent substrate. The width of the overlap region is represented by d, and 1mm≤d≤20mm.

[0017] Preferably, the overlapping area is provided with a POE, TPO or TPU sealing layer so that the layer size of the dimming film where the overlapping area is located is the same as the size of the first transparent substrate and the second transparent substrate, or so that the size difference between the layer size of the dimming film where the overlapping area is located and the size difference between the first transparent substrate and the second transparent substrate is reduced, and the difference still exists after reduction, d≤5mm.

[0018] Preferably, the size of the first interlayer and / or the second interlayer is equal to or greater than the size of the dimming film, and the size of the first interlayer and / or the second interlayer is equal to or less than the size of the first transparent substrate and the second transparent substrate.

[0019] Preferably, the A-film further includes one or more of ultraviolet absorbers, infrared absorbers, antioxidants, and light stabilizers;

[0020] The ultraviolet absorber is selected from one or more of the following: salicylates, benzophenones, benzotriazoles, triazines, trimethoxybenzoates, p-aminobenzoic acid, phenyl cinnamates, camphor derivatives, benzamides, and benzoxazines.

[0021] The infrared absorber is selected from one or more of Fe2O3, SiC, SiO2, Si3N4, Al2O3, CaCO3, TiO2, Nb2O5, ZnO, mica, graphite, tungsten bronze, indium tin oxide, antimony tin oxide, and copper sulfide with oxygen vacancies.

[0022] The antioxidant is selected from one or more of the following: pentaerythritol tetrakis[β-(3,5-di-tert-butylphenyl)propionate], tris(2,4-di-tert-butylphenyl) phosphite, octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, vinylbis(oxyvinyl)bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate], triphenyl phosphite, and triphenyl phosphate.

[0023] The light stabilizer is selected from one or more of bis(2,2,6,6-tetramethyl-4-piperidine) sebacate, 1-methyl-8-(1,2,2,6,6-pentamethyl-5-piperidine) sebacate and 2-(2'-hydroxy-5'-methylphenyl)-benzotriazole.

[0024] Preferably, the content of the ultraviolet absorber is 0.1-5 wt%, and / or the content of the infrared absorber is 0.1-5 wt%, and / or the content of the antioxidant is 0.1-5 wt%, and / or the content of the light stabilizer is 0.1-5 wt%.

[0025] Preferably, the A-film further includes color masterbatch, and / or the content of the color masterbatch is 0.1-5 wt%.

[0026] Preferably, when the A-film includes PVB, the A-film also includes a plasticizer.

[0027] Preferably, the plasticizer includes phthalate plasticizers and / or triphthalate plasticizers, and / or the content of the plasticizer is 10wt% to 35wt%.

[0028] Preferably, the first transparent substrate and / or the second transparent substrate are transparent glass plates or transparent plastic sheets.

[0029] Preferably, the dimming film is selected from at least one of suspended particle dimming film, polymer-dispersed liquid crystal dimming film, and electrochromic dimming film.

[0030] This application also provides a method for preparing the aforementioned dimming component, comprising:

[0031] The dimming components are obtained by stacking the layers of the dimming component in sequence and then laminating them together.

[0032] The dimming component is the dimming component described above.

[0033] Preferably, the temperature of the lamination process is 90–130°C and the pressure is 0.1–1.5 MPa.

[0034] This application also provides the application of a dimming component in glass products, wherein the dimming component is the dimming component described above or the dimming component prepared by the above preparation method.

[0035] Preferably, the glass product is automotive window glass, panoramic glass, or glass curtain wall.

[0036] This application provides a dimming assembly, comprising: a first transparent substrate, a second transparent substrate, and a dimming film disposed between the first transparent substrate and the second transparent substrate; a first adhesive layer is disposed between the first transparent substrate and the dimming film, and / or a second adhesive layer is disposed between the second transparent substrate and the dimming film; the first adhesive layer and / or the second adhesive layer are composite adhesive films of adhesive film A and adhesive film B; adhesive film A in the first adhesive layer is closer to the end of the first transparent substrate, and adhesive film B in the first adhesive layer is closer to the end of the dimming film; and / or adhesive film A in the second adhesive layer is closer to the end of the second transparent substrate, and adhesive film B in the second adhesive layer is closer to the end of the dimming film; adhesive film A includes PVB or EVA, and adhesive film B includes POE or TPO. The dimming component provided in this application introduces a composite adhesive film of adhesive film A and adhesive film B between the transparent substrate and the dimming film. Through the synergistic effect of PVB or EVA of adhesive film A and POE or TPO of adhesive film B, good adhesion between adhesive film A and transparent substrate, good adhesion between adhesive film B and dimming film, and good water vapor barrier performance of composite adhesive film are achieved, which meets the water vapor barrier requirements and mechanical performance requirements of dimming component and expands the application scenarios of dimming component. Attached Figure Description

[0037] Figure 1 is a schematic diagram of the dimming component 1 provided by the present invention;

[0038] Figure 2 is a schematic diagram of the structure of the dimming component provided by the present invention, which specifically includes a composite film of film A and film B.

[0039] Figure 3 is a schematic diagram of the dimming component 2 provided by the present invention;

[0040] Figure 4 is a schematic diagram of the dimming component 3 provided by the present invention;

[0041] Figure 5 is a schematic diagram of the dimming component 4 provided by the present invention;

[0042] Figure 6 is a schematic diagram of the dimming component 5 provided by the present invention;

[0043] Figure 7 is a schematic diagram of the dimming component 6 provided by the present invention;

[0044] Figure 8 is a schematic diagram of the dimming component 7 provided by the present invention;

[0045] Wherein, 1-1 is the first transparent substrate, 2-1 is the first interlayer adhesive, 3 is the dimming film, 2-2 is the second interlayer adhesive, 1-2 is the second transparent substrate, and 4 is the edge sealing layer; A is a PVB film or an EVA film, and B is a POE film or a TPO film; d represents the overlap difference between the dimming film and the corresponding edges of the first transparent substrate, the second transparent substrate, the first interlayer adhesive, and the second interlayer adhesive, or the overlap difference between the dimming film and the edge sealing layer and the corresponding edges of the first transparent substrate, the second transparent substrate, the first interlayer adhesive, and the second interlayer adhesive. Detailed Implementation

[0046] To further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the scope of the claims of the present invention.

[0047] In view of the requirements for moisture barrier properties in the interlayer of dimming components in the prior art, and the requirement to avoid edge dimming performance degradation and failure of dimming components, this application provides a dimming component that, by introducing a composite film of adhesive film A and adhesive film B, utilizes the synergistic effect of PVB or EVA of adhesive film A and POE or TPO of adhesive film B to achieve good adhesion between adhesive film A and the transparent substrate, good adhesion between adhesive film B and the dimming film, and good moisture barrier properties of the composite film, thus meeting the moisture barrier and mechanical performance requirements of dimming components. Specifically, this application first provides a dimming component, including:

[0048] A first transparent substrate, a second transparent substrate, and a dimming film disposed between the first transparent substrate and the second transparent substrate;

[0049] A first adhesive layer is provided between the first transparent substrate and the dimming film, and / or a second adhesive layer is provided between the second transparent substrate and the dimming film;

[0050] The first adhesive layer and / or the second adhesive layer are composite adhesive films of adhesive film A and adhesive film B;

[0051] The A film in the first interlayer is close to the end of the first transparent substrate, and the B film in the first interlayer is close to the end of the dimming film;

[0052] And / or, the A film in the second interlayer is close to the end of the second transparent substrate, and the B film in the second interlayer is close to the end of the dimming film;

[0053] The A film includes PVB or EVA, and the B film includes POE or TPO.

[0054] In the dimming assembly provided in this application, the materials of the first transparent substrate and the second transparent substrate can be the same or different. This application does not impose any special restrictions on this. Transparent glass, which is well known to those skilled in the art, can be used for conventional dimming assemblies. It can be ordinary glass such as inorganic glass or organic glass, such as PC board or PMMA board; it can also be functional glass, such as UV blocking glass, IR blocking glass, Low-E glass, tempered glass or antibacterial glass; it can also be selected from colored glass such as gray glass or brown glass.

[0055] In one embodiment of the present invention, the first transparent substrate, the first interlayer adhesive layer, the dimming film, the second interlayer adhesive layer, and the second transparent substrate are of the same size, and the above layers are stacked sequentially, as shown in Figure 1. In Figure 1, 1-1 is the first transparent substrate, 2-1 is the first interlayer adhesive layer, 3 is the dimming film, 2-2 is the second interlayer adhesive layer, and 1-2 is the second transparent substrate. In the first interlayer adhesive layer, the A film is close to the end of the first transparent substrate, and the B film is close to the end of the dimming film. In the second interlayer adhesive layer, the A film is close to the end of the second transparent substrate, and the B film is close to the end of the dimming film, as shown in Figure 2.

[0056] In one embodiment of the present invention, the first transparent substrate and the second transparent substrate are substantially the same size, while the size of the dimming film is smaller than that of the first transparent substrate and the second transparent substrate. At least one end of the dimming film has an overlap region with the corresponding position of the first transparent substrate and the second transparent substrate. The width of the overlap region is denoted by d, and 1 mm ≤ d ≤ 20 mm. The overlap region can exist on one side of the dimming film, as shown in Figure 3; the overlap region can also exist on both sides of the dimming film, as shown in Figures 4 and 7; the overlap region can also exist around the dimming film.

[0057] In one specific embodiment of the present invention, the overlapping region is further provided with a POE edge-sealing layer, a TPO edge-sealing layer, or a TPU edge-sealing layer, so that the layer size of the dimming film where the overlapping region is located is the same as the size of the first transparent substrate and the second transparent substrate, as shown in Figures 5 and 6; or, the POE edge-sealing layer, TPO edge-sealing layer, or TPU edge-sealing layer provided in the overlapping region can also reduce the size difference between the layer size of the dimming film where the overlapping region is located and the size difference between the first transparent substrate and the second transparent substrate, as shown in Figure 8, where the difference is reduced but d ≤ 5mm still exists. Further, the edge-sealing layer is preferably POE or TPO.

[0058] In one specific embodiment of the present invention, the size of the first interlayer and / or the second interlayer is greater than or equal to the size of the dimming film, and the size of the first interlayer and / or the second interlayer is less than or equal to the size of the first transparent substrate and the second transparent substrate; in this scheme, the setting of the overlap region and / or the edge sealing layer is the same as the setting of the overlap region and / or the edge sealing layer when the size of the dimming film is less than the size of the first transparent substrate and the second transparent substrate. Specifically, the dimensions of the first and second interlayer adhesive layers are equal to the dimensions of the dimming film and smaller than the dimensions of the first and second transparent substrates. In this scheme, there may also be a stacking difference region and / or an edge sealing layer, as shown in Figures 6 and 7. The stacking difference region exists on both sides of the dimming film, the first interlayer adhesive layer, and the second interlayer adhesive layer, or on one side of the dimming film, the first interlayer adhesive layer, and the second interlayer adhesive layer, or around the dimming film, the first interlayer adhesive layer, and the second interlayer adhesive layer. Furthermore, the stacking difference region is also provided with a POE edge sealing layer, a TPO edge sealing layer, or a TPU edge sealing layer so that the layer dimensions of the first interlayer adhesive layer, the second interlayer adhesive layer, and the dimming film where the stacking difference region is located are the same as the dimensions of the first and second transparent substrates. Alternatively, the POE edge sealing layer, TPO edge sealing layer, or TPU edge sealing layer provided in the stacking difference region can also reduce the difference between the layer dimensions of the first interlayer adhesive layer, the second interlayer adhesive layer, and the dimming film where the stacking difference region is located and the dimensions of the first and second transparent substrates, where the difference is reduced, and the remaining d ≤ 5mm.

[0059] In this application, the overlap d of the overlap region has a significant impact on the high temperature and high humidity stability of the dimming component. The larger the d, the better the water vapor blocking performance, which is in line with the general rules of film materials. However, considering that the larger the d, the larger the non-dimming area at the edge of the dimming component, the more it affects the application range of the dimming component. In this invention, d can be greater than 20mm, which will result in better water vapor blocking performance, but it loses the significance of reducing the width of the non-dimming area. Therefore, in this invention, the range of d is 1mm≤d≤20mm, preferably 3mm≤d≤10mm. For example, in this application, d is 3mm, 4mm, 5mm, 6mm, 7mm, 9mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, and 19mm.

[0060] In this invention, if d≤5mm, an edge sealing layer is not required; if 5mm≤d≤20mm, an edge sealing layer is preferred to prevent damage to the glass edges due to thickness differences during the lamination process of making the dimming glass; as shown in Figure 8.

[0061] The total thickness of the first or second interlayer is independently 0.1 mm to 2 mm, preferably 0.2 mm to 1 mm; for example, in this application, the thickness of the first or second interlayer is independently 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, or 1.9 mm.

[0062] The thickness of film A is 10-60% of the total thickness of the composite film, and the thickness of film B is 40-90% of the total thickness of the composite film; preferably, the thickness of film A is 20-50% of the total thickness of the composite film, and the thickness of film B is 50-80% of the total thickness of the composite film; more specifically, the thickness of film A is 30-40% of the total thickness of the composite film, and the thickness of film B is 60-70% of the total thickness of the composite film.

[0063] The A-layer composite film also includes color masterbatch. Preferably, the b* value of the AB double-layer composite film is between -10 and 10, and more preferably, the b* value is between -1 and 5. The color particles are those well known to those skilled in the art, and this application does not impose any particular restrictions on them. The content of the color masterbatch is 0.1-5 wt%; specifically, the content of the color masterbatch is 0.5-4 wt%; for example, the content of the color masterbatch is 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, and 5 wt%.

[0064] Furthermore, the A-film also includes one or more of the following: ultraviolet absorber, infrared absorber, antioxidant, and light stabilizer; wherein the ultraviolet absorber is selected from one or more of salicylates, benzophenones, benzotriazoles, triazines, trimethoxybenzoates, p-aminobenzoic acid, phenyl cinnamates, camphor derivatives, benzamides, and benzoxazines; the infrared absorber is selected from one or more of Fe2O3, SiC, SiO2, Si3N4, Al2O3, CaCO3, TiO2, Nb2O5, ZnO, mica, graphite, tungsten bronze, indium tin oxide, antimony tin oxide, and copper sulfide with oxygen vacancies; the antioxidant... The oxidant is selected from one or more of pentaerythritol tetrakis[β-(3,5-di-tert-butylphenyl)propionate], tris(2,4-di-tert-butylphenyl)phosphite, octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, vinylbis(oxyvinyl)bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate], triphenyl phosphite, and triphenyl phosphate; the light stabilizer is selected from one or more of bis(2,2,6,6-tetramethyl-4-piperidine) sebacate, 1-methyl-8-(1,2,2,6,6-pentamethyl-5-piperidine) sebacate, and 2-(2'-hydroxy-5'-methylphenyl)-benzotriazole.

[0065] In the A-film, the content of the ultraviolet absorber is 0.1-5 wt%, specifically, the content of the ultraviolet absorber is 1-3 wt%; for example, in this application, the content of the ultraviolet absorber is 0.5 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, and 4.5 wt%.

[0066] The infrared absorber content is 0.1-5 wt%, specifically, the infrared absorber content is 1-2.5 wt%; for example, the infrared absorber content is 0.5 wt%, 1.5 wt%, 2 wt%, 3 wt%, 3.5 wt%, 4 wt%, and 4.5 wt%.

[0067] The antioxidant content is 0.1-5 wt%, specifically, the antioxidant content is 0.5-4 wt%; for example, the antioxidant content is 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, and 4.5 wt%.

[0068] The light stabilizer content is 0.1-5 wt%, specifically, the light stabilizer content is 0.5-4 wt%; for example, the light stabilizer content is 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, or 4.5 wt%.

[0069] In this application, when the A-film comprises PVB, the A-film also includes a plasticizer; the plasticizer includes phthalate plasticizers and / or triphthalate plasticizers. The content of the plasticizer is 10wt% to 35wt%, specifically, the content of the plasticizer is 15% to 32wt%; for example, the content of the plasticizer in this application is 11wt%, 12wt%, 13wt%, 14wt%, 16wt%, 17wt%, 18wt%, 19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 31wt%, 32wt%, 33wt%, and 34wt%.

[0070] In this application, the dimming film is selected from at least one of suspended particle dimming film, polymer-dispersed liquid crystal dimming film, and electrochromic dimming film; specifically, the dimming film is selected from suspended particle dimming film, polymer-dispersed liquid crystal dimming film, or electrochromic dimming film.

[0071] In the aforementioned dimming assembly, the dimensions can represent the length direction, the width direction, or both. In the above description of dimensions, the comparison of dimensions refers to a comparison within the same direction. For example, the length of the dimming film is compared to the length of the first and / or second interlayer adhesive layers, the width of the dimming film is compared to the width of the first and / or second interlayer adhesive layers, and the length and width of the dimming film are compared simultaneously with the length and width of the first and / or second interlayer adhesive layers. A comparison cannot be made between the width of the dimming film and the length of the composite adhesive film. In this application, the dimensions do not include the thickness direction.

[0072] This application also provides a method for fabricating a dimming component, including:

[0073] The dimming components are obtained by stacking the layers of the dimming component in sequence and then laminating them together.

[0074] The dimming component is obtained by sequentially stacking and bonding the first transparent substrate, the first interlayer, the dimming film, the second interlayer, and the second transparent substrate.

[0075] In the above preparation process, the adhesive bonding treatment is a well-known technique in the art, and this application does not have any particular limitations on it; specifically, the temperature of the adhesive bonding treatment is 90 to 130°C, and the adhesive bonding pressure is 0.1 MPa to 1.5 MPa; preferably, the temperature of the adhesive bonding treatment is 100 to 120°C, and the adhesive bonding pressure is 0.2 kPa to 1.0 MPa.

[0076] This application also provides the application of dimming components in glass products, more specifically in automotive windows, skylights, or glass curtain walls.

[0077] To further understand the present invention, the dimming component, its preparation method and its application provided by the present invention will be described in detail below with reference to the embodiments. The scope of protection of the present invention is not limited by the following embodiments.

[0078] Example 1: Composite film of adhesive film A and adhesive film B

[0079] Film A is PVB, and film B is POE. Film A and film B are combined to obtain a composite film. The thickness of PVB accounts for 10% of the total thickness of the composite film, which is 0.19 mm, and the thickness of POE accounts for 90% of the total thickness, which is 1.71 mm. The total thickness of the composite film is 1.90 mm.

[0080] Example 2: Composite film of adhesive film A and adhesive film B

[0081] Film A is PVB, and film B is TPO. Film A and film B are combined to obtain a composite film. The thickness of PVB accounts for 50% of the total thickness of the composite film, which is 0.38 mm. The thickness of TPO accounts for 50% of the total thickness of the composite film, which is 0.38 mm. The total thickness of the composite film is 0.76 mm.

[0082] Example 3: Composite film of adhesive film A and adhesive film B

[0083] Film A is made of PVB, and film B is made of POE. Films A and B are laminated to obtain a composite film. The PVB thickness accounts for 30% of the total thickness of the composite film, which is 0.20 mm, and the POE thickness accounts for 70% of the total thickness, which is 0.47 mm. The total thickness of the composite film is 0.67 mm. Film A also includes an infrared absorber and an ultraviolet absorber. The infrared absorber is Nb₂O₅ particles, with a content of 3.0 wt%; the ultraviolet absorber is UV-328, with a content of 2.5 wt%.

[0084] Example 4: Composite film of adhesive film A and adhesive film B

[0085] Film A is PVB, and film B is TPO. Films A and B are combined to obtain a composite film. The PVB thickness accounts for 40% of the total thickness of the composite film (0.10 mm), and the TPO thickness accounts for 60% (0.15 mm), resulting in a total composite film thickness of 0.25 mm. Film A also includes an infrared absorber, an ultraviolet absorber, an antioxidant, and a light stabilizer. The infrared absorber is TiO2 particles with a content of 2.0 wt%; the ultraviolet absorber is UV-328 with a content of 4.5 wt%; the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butylphenyl)propionate] with a content of 0.5 wt%; and the light stabilizer is bis(2,2,6,6-tetramethyl-4-piperidine) sebacate with a content of 0.5 wt%.

[0086] Example 5: Composite film of adhesive film A and adhesive film B

[0087] Film A is made of PVB, and film B is made of TPO. Films A and B are combined to obtain a composite film. The thickness of PVB accounts for 40% of the total thickness of the composite film, which is 0.38 mm, and the thickness of TPO accounts for 60% of the total thickness of the composite film, which is 0.57 mm. The total thickness of the composite film is 0.95 mm. Film A also contains color masterbatch, with a content of 3.3 wt%. The b* value of the composite film is 3.2.

[0088] Example 6: Composite film of adhesive film A and adhesive film B

[0089] Film A is made of EVA, and film B is made of POE. Film A and film B are combined to obtain a composite film. The thickness of EVA accounts for 40% of the total thickness of the composite film, which is 0.38 mm, and the thickness of POE accounts for 60% of the total thickness of the composite film, which is 0.57 mm. The total thickness of the composite film is 0.95 mm.

[0090] Example 7: Composite film of adhesive film A and adhesive film B

[0091] Film A is EVA, and film B is TPO. Film A and film B are combined to obtain a composite film. The thickness of EVA accounts for 50% of the total thickness of the composite film, which is 0.10 mm, and the thickness of TPO accounts for 50% of the total thickness of the composite film, which is 0.10 mm. The total thickness of the composite film is 0.20 mm.

[0092] Example 8: Composite film of adhesive film A and adhesive film B

[0093] Film A is made of EVA, and film B is made of POE. Films A and B are combined to obtain a composite film. The thickness of EVA accounts for 30% of the total thickness of the composite film, which is 0.30 mm, and the thickness of POE accounts for 70% of the total thickness of the composite film, which is 0.70 mm. The total thickness of the composite film is 1.00 mm. Film A also includes an infrared absorber and an ultraviolet absorber. The infrared absorber is Fe2O3 particles with a content of 3.0 wt%; the ultraviolet absorber is UV-328 with a content of 2.5 wt%.

[0094] Example 9: Composite film of adhesive film A and adhesive film B

[0095] Film A is EVA, and film B is TPO. Films A and B are laminated to obtain a double-layer composite film. The EVA thickness accounts for 20% of the total thickness of the composite film, which is 0.10 mm, and the TPO thickness accounts for 80% of the total thickness, which is 0.40 mm, resulting in a total composite film thickness of 0.50 mm. Film A also includes an infrared absorber, an ultraviolet absorber, an antioxidant, and a light stabilizer. The infrared absorber is TiO2 particles, with a content of 2.0 wt%; the ultraviolet absorber is UV-328, with a content of 4.5 wt%; the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butylphenyl)propionate], with a content of 0.5 wt%; and the light stabilizer is bis(2,2,6,6-tetramethyl-4-piperidine) sebacate, with a content of 0.5 wt%.

[0096] Example 10: Composite film of adhesive film A and adhesive film B

[0097] Film A is made of EVA, and film B is made of TPO double-layer composite film. The thickness of EVA accounts for 40% of the total thickness of the composite film, which is 0.38 mm, and the thickness of TPO accounts for 60% of the total thickness of the composite film, which is 0.57 mm. The total thickness of the composite film is 0.95 mm. Film A also contains color masterbatch, with a content of 3.3 wt%. The b* value of the composite film is 6.3.

[0098] Example 11 Dimming Component

[0099] Using two composite films from Example 1, a suspended particle dimming film, and ordinary white glass, the layers are stacked according to the structure of the dimming component shown in Figure 4, and then laminated in a laminator to obtain the dimming component. The lamination conditions are: temperature 110℃, vacuum for 10 minutes, gradually pressurized to 450kPa, and delayed for 30 minutes. There is an overlap difference of d of 2mm between the dimming film and the edge of the dimming component, and there is no sealing layer.

[0100] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0101] Example 12 Dimming Component

[0102] Using two composite films from Example 2, a suspended particle dimming film, and gray glass, the layers are stacked according to the structure of the dimming component shown in Figure 5, and then laminated to obtain the dimming component. The lamination conditions are the same as in Example 11, except that the lamination pressure is 350 kPa, there is an overlap difference of d 10 mm from the edge of the dimming component, and the sealing layer is TPO.

[0103] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0104] Example 13 Dimming Component

[0105] Using two composite films from Example 3, a polymer-dispersed liquid crystal dimming film, and a PC board, the layers are stacked according to the structure of the dimming component shown in Figure 4, and then a lamination process is performed to obtain the dimming component. The lamination conditions are the same as in Example 11, except that the lamination temperature is 115°C, there is an overlap difference of d 2 mm from the edge of the dimming component, and there is no sealing layer.

[0106] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0107] Example 14 Dimming Component

[0108] Using two composite films from Example 4, a polymer-dispersed liquid crystal dimming film, and Low-E glass, the layers are stacked according to the structure of the dimming assembly shown in Figure 5, and then laminated to obtain the dimming assembly. The lamination conditions are the same as in Example 11, except that an autoclave is used, and there is an overlap difference of d 5 mm from the edge of the dimming assembly to the dimming film. The sealing layer is TPU.

[0109] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0110] Example 15 Dimming Component

[0111] Using two composite films from Example 5, an electrochromic dimming film, and Low-E glass, the layers are stacked according to the structure of the dimming assembly shown in Figure 4, and then laminated to obtain the dimming assembly. The lamination conditions are the same as in Example 14, with a 2mm overlap between the dimming film and the edge of the dimming assembly, and no sealing layer.

[0112] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0113] Example 16 Dimming Component

[0114] Using two composite films from Example 6, an electrochromic dimming film, and ordinary white glass, the layers are stacked according to the structure of the dimming component shown in Figure 4, and then laminated to obtain the dimming component. The lamination conditions are the same as in Example 14, except that the lamination temperature is 120°C, there is an overlap difference of d 3 mm from the edge of the dimming component, and there is no sealing layer.

[0115] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0116] Example 17 Dimming Component

[0117] Using two composite films from Example 7, a suspended particle dimming film, and ordinary white glass, the layers are stacked according to the structure of the dimming component shown in Figure 5, and then laminated to obtain the dimming component. The lamination conditions are the same as in Example 14, except that the lamination pressure is 1.0 MPa, there is an overlap difference of d 4 mm from the edge of the dimming component, and the sealing layer is POE.

[0118] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0119] Example 18 Dimming Component

[0120] Using two composite films from Example 8, a suspended particle dimming film, and ordinary white glass, the layers are stacked according to the structure of the dimming component shown in Figure 4, and then laminated to obtain the dimming component. The lamination conditions are the same as in Example 11, with a 1mm overlap between the dimming film and the edge of the dimming component, and no sealing layer.

[0121] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0122] Example 19 Dimming Component

[0123] Using two composite films from Example 9, a polymer-dispersed liquid crystal dimming film, and ordinary white glass, the layers are stacked according to the structure of the dimming component shown in Figure 4, and then laminated to obtain the dimming component; the lamination conditions are the same as in Example 13, the dimming film has an overlap difference of 1 mm around the edge of the dimming component, and there is no sealing layer.

[0124] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0125] Example 20: Dimming Component

[0126] Using two composite films from Example 10, an electrochromic dimming film, and ordinary white glass, the layers are stacked according to the structure of the dimming component shown in Figure 7, and then laminated to obtain the dimming component; the lamination conditions are the same as in Example 15, the dimming film has an overlap difference of 1 mm around the edge of the dimming component, and there is no sealing layer.

[0127] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0128] Example 21 Dimming Component

[0129] Same as Example 11, except that the overlap is approximately 0 mm.

[0130] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0131] Example 22 Dimming Component

[0132] Similar to Example 12, except that the layers are stacked according to the structure of the dimming assembly shown in Figure 6.

[0133] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0134] Example 23 Dimming Component

[0135] Similar to Example 14, except that the layers are stacked according to the structure of the dimming assembly shown in Figure 6.

[0136] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0137] Comparative Example 1: Dimming Component

[0138] Same as Example 11, except that the composite film of Example 1 is replaced with a conventional PVB film.

[0139] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0140] Comparative Example 2: Dimming Components

[0141] Similar to Example 11, except that the composite film of Example 11 is replaced with a conventional EVA film, and the edge sealing layer is conventional EVA.

[0142] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0143] Comparative Example 3 Dimming Components

[0144] Same as Example 11, except that the composite film of Example 11 is replaced with a conventional POE film.

[0145] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0146] Comparative Example 4 Dimming Components

[0147] Same as Example 11, except that the composite film of Example 11 is replaced with a conventional TPO film.

[0148] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0149] Comparative Example 5 Dimming Components

[0150] Similar to Example 12, except that the composite film of Example 2 is replaced with a conventional PVB film, and the edge sealing layer is conventional PVB.

[0151] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0152] Comparative Example 6 Dimming Components

[0153] Similar to Example 12, except that the composite film in Example 2 is replaced with a conventional EVA film, the dimming film has an overlap difference around the edge of the dimming component, d is 20mm, and the sealing layer is EVA.

[0154] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0155] Comparative Example 7 Dimming Component

[0156] Similar to Example 11, except that: in the composite film, film A is closer to the dimming film end and film B is closer to the glass end.

[0157] The impact value of the dimming component was tested, and the size of the edge failure of the dimming film after the high temperature and high humidity test was measured. Detailed parameters and test results are shown in Table 1.

[0158] Comparative Example 8 Dimming Components

[0159] Same as Comparative Example 5, except that d is 25mm.

[0160] The adhesion and high-temperature and high-humidity stability of the dimming components prepared in the above embodiments and comparative examples were tested using the following specific testing methods:

[0161] Test method for adhesion of dimming components: Sample preparation and testing shall be carried out in accordance with the tapping value test in 5.4.6 of GB / T 32020-2015. The larger the tapping value, the stronger the adhesion.

[0162] High temperature and high humidity stability test method for dimming components: Place a 30cm×30cm dimming component in a high temperature and high humidity test chamber at 85℃ and 85% humidity for 48 hours. Measure the size of the deterioration at the edge of the dimming film of the dimming component after aging with a ruler. The larger the size of the deterioration, the worse the moisture barrier performance of the adhesive layer.

[0163] The d-value, edge sealing layer settings, and impact value of the dimming components provided in the above embodiments and comparative examples, as well as the dimensions of edge failure of the dimming film after high temperature and high humidity tests, detailed parameters, and test results are shown in Table 1.

[0164] Table 1. Partial parameters and performance data of the dimming components provided in the embodiments and comparative examples.

[0165] Comparing Example 11 with Comparative Example 1, it can be seen that the impact value of the dimming component made with the composite film of the present invention is comparable to that of conventional PVB film; the high temperature and high humidity aging stability is greatly improved. After the high temperature and high humidity aging test in Example 11, the width of the edge performance failure zone of the dimming film caused by water vapor is <0.5mm, while in Comparative Example 1, which uses conventional PVB film, the width of the edge performance failure zone of the dimming film caused by water vapor is 6.0mm.

[0166] Comparing Example 11 with Comparative Example 2, it can be seen that the impact value of the dimming component made with the composite film of the present invention is comparable to that of conventional EVA film, but the high temperature and high humidity aging stability is greatly improved. After the high temperature and high humidity aging test in Example 11, the width of the edge performance failure zone of the dimming film caused by water vapor is <0.5mm, while in Comparative Example 2, which uses conventional EVA film, the width of the edge performance failure zone of the dimming film caused by water vapor is 4.0mm.

[0167] A comparison of Example 11 with Comparative Example 3 or Comparative Example 4 shows that the dimming component made using the composite film of the present invention has a higher impact value than conventional POE or TPO films; its high temperature and high humidity aging stability is also slightly better.

[0168] Comparing Example 12 with Comparative Example 5, it can be seen that the impact value of the dimming component made with the composite film of the present invention is comparable to that of conventional PVB film, but the high temperature and high humidity aging stability is greatly improved. After the high temperature and high humidity aging test in Example 12, there is basically no failure area at the edge of the dimming film, while in Comparative Example 5, which uses conventional PVB film, the width of the failure area at the edge of the dimming film caused by moisture is 2.0 mm.

[0169] The overlap d has a significant impact on the high temperature and high humidity stability of the dimming component. The larger the d, the better the performance of blocking water vapor, which is in line with the general rule of film materials. However, considering that the larger the d, the larger the non-dimming area at the edge of the dimming component, it affects the application range of the dimming component.

[0170] In Example 21, the dimming component made using the composite film of the present invention had an edge failure size of 0.5 mm and d of 0 after a high temperature and high humidity test. In Comparative Example 8, the edge failure size of the dimming film was also 0.5 mm after a high temperature and high humidity test, but d was 25 mm. It can be seen that the composite film of the present invention can significantly reduce d while maintaining a similar water-blocking effect. This means that the width of the non-dimming functional area around the dimming component can be significantly reduced, which can expand the application scenarios of the dimming component.

[0171] Comparing Example 11 with Comparative Example 7, it can be seen that the dimming component made using the composite film of the present invention, with the outer surface of layer A facing the first transparent substrate or the second transparent substrate and the outer surface of layer B facing the dimming film, can obtain a higher tapping value and has better mechanical properties.

[0172] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0173] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dimming component, characterized in that, include: A first transparent substrate, a second transparent substrate, and a dimming film disposed between the first transparent substrate and the second transparent substrate; A first adhesive layer is provided between the first transparent substrate and the dimming film, and / or a second adhesive layer is provided between the second transparent substrate and the dimming film; The first adhesive layer and / or the second adhesive layer are composite adhesive films of adhesive film A and adhesive film B; The A film in the first interlayer is close to the end of the first transparent substrate, and the B film in the first interlayer is close to the end of the dimming film; And / or, the A film in the second interlayer is close to the end of the second transparent substrate, and the B film in the second interlayer is close to the end of the dimming film; The A film includes PVB or EVA, and the B film includes POE or TPO.

2. The dimming component according to claim 1, characterized in that, The thickness of the first adhesive layer and / or the second adhesive layer is 0.1 mm to 2 mm.

3. The dimming component according to claim 1, characterized in that, The thickness of film A is 10-60% of the total thickness of the composite film, and the thickness of film B is 40-90% of the total thickness of the composite film.

4. The dimming component according to claim 1, characterized in that, The first transparent substrate and the second transparent substrate have the same size. The size of the dimming film is smaller than that of the first transparent substrate and the second transparent substrate. At least one end of the dimming film has an overlap region with the corresponding position of the first transparent substrate and the second transparent substrate. The width of the overlap region is represented by d, and 1mm≤d≤20mm.

5. The dimming component according to claim 4, characterized in that, The overlapping area is provided with a POE, TPO or TPU sealing layer so that the layer size of the dimming film where the overlapping area is located is the same as the size of the first transparent substrate and the second transparent substrate, or so that the size difference between the layer size of the dimming film where the overlapping area is located and the size difference between the first transparent substrate and the second transparent substrate is reduced, and the difference still exists d≤5mm after reduction.

6. The dimming component according to claim 1, characterized in that, The size of the first interlayer and / or the second interlayer is equal to or greater than the size of the dimming film, and the size of the first interlayer and / or the second interlayer is equal to or less than the size of the first transparent substrate and the second transparent substrate.

7. The dimming component according to claim 1, characterized in that, The A-film also includes one or more of the following: ultraviolet absorber, infrared absorber, antioxidant, and light stabilizer; The ultraviolet absorber is selected from one or more of the following: salicylates, benzophenones, benzotriazoles, triazines, trimethoxybenzoates, p-aminobenzoic acid, phenyl cinnamates, camphor derivatives, benzamides, and benzoxazines. The infrared absorber is selected from one or more of Fe2O3, SiC, SiO2, Si3N4, Al2O3, CaCO3, TiO2, Nb2O5, ZnO, mica, graphite, tungsten bronze, indium tin oxide, antimony tin oxide, and copper sulfide with oxygen vacancies. The antioxidant is selected from one or more of the following: pentaerythritol tetrakis[β-(3,5-di-tert-butylphenyl)propionate], tris(2,4-di-tert-butylphenyl) phosphite, octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, vinylbis(oxyvinyl)bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate], triphenyl phosphite, and triphenyl phosphate. The light stabilizer is selected from one or more of bis(2,2,6,6-tetramethyl-4-piperidine) sebacate, 1-methyl-8-(1,2,2,6,6-pentamethyl-5-piperidine) sebacate and 2-(2'-hydroxy-5'-methylphenyl)-benzotriazole.

8. The dimming component according to claim 7, characterized in that, The content of the ultraviolet absorber is 0.1-5 wt%, and / or the content of the infrared absorber is 0.1-5 wt%, and / or the content of the antioxidant is 0.1-5 wt%, and / or the content of the light stabilizer is 0.1-5 wt%.

9. The dimming component according to claim 1, characterized in that, The A-film also includes color masterbatch, and / or the content of the color masterbatch is 0.1-5 wt%.

10. The dimming assembly according to claim 1, characterized in that, When the A-film includes PVB, the A-film also includes a plasticizer.

11. The dimming assembly according to claim 10, characterized in that, The plasticizer includes phthalate plasticizers and / or triphthalate plasticizers, and / or the content of the plasticizer is 10wt% to 35wt%.

12. The dimming component according to claim 1, characterized in that, The first transparent substrate and / or the second transparent substrate are transparent glass plates or transparent plastic sheets.

13. The dimming component according to claim 1, characterized in that, The dimming film is selected from at least one of suspended particle dimming film, polymer-dispersed liquid crystal dimming film, and electrochromic dimming film.

14. A method for preparing the dimming component according to any one of claims 1 to 13, comprising: The dimming components are obtained by stacking the layers of the dimming component in sequence and then laminating them together. The dimming component is the dimming component according to any one of claims 1 to 13.

15. The preparation method according to claim 14, characterized in that, The temperature of the lamination process is 90–130°C, and the pressure is 0.1–1.5 MPa.

16. Application of a dimming component in glass products, wherein the dimming component is the dimming component according to any one of claims 1 to 13 or the dimming component prepared by the preparation method according to any one of claims 14 to 15.

17. The application according to claim 16, characterized in that, The glass products are automotive window glass, panoramic glass, or glass curtain walls.

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