Long-lasting anti-fogging optically transparent sheet

Abstract

The application provides a long-acting anti-fog transparent optical plate, and relates to the technical field of optics. The long-acting anti-fog transparent optical plate comprises a transparent layer, a glue layer and a functional plastic layer. The transparent layer is arranged on the outer side, the two sides of the glue layer are connected with the transparent layer and the functional plastic layer respectively, and the functional plastic layer is arranged on the inner side. The long-acting anti-fog transparent optical plate comprises an anti-fog film piece, and the thickness of the anti-fog film piece is 10-1000 microns. A mold is arranged on one side of the functional plastic layer to perform solidification treatment, the shape of the anti-fog film piece is reshaped through the mold, and the long-acting anti-fog optical transparent plate meeting the optical requirements is obtained after the mold is removed. Through the arrangement of the mold, the firmness of the transparent layer, the glue layer and the functional plastic layer is improved. The obtained product is light in weight, high in strength, good in safety, has good long-acting anti-fog effect, and has a long service life. The anti-fog time reaches 0.5-12 hours.

Description

Technical Field

[0001] This invention relates to the field of optical technology, and more specifically, to a long-lasting anti-fog optical transparent plate. Background Technology

[0002] With technological advancements, consumers' needs for automotive window glass have expanded beyond the basic function of "protecting from wind and rain." In recent years, various functional window glass products have been developed, such as those with heat insulation and color-changing properties, representing a growing trend in window glass product variety and functionality. To date, most new functional window glass utilizes a laminated glass structure, with a functional film sandwiched between two layers of glass. However, this method is unsuitable for windows requiring anti-fog functionality, as the anti-fog film between the laminated glass layers is ineffective. It is well known that when the saturated vapor pressure of water inside a car is higher than outside, water vapor inside the car condenses on the window glass, forming fog. For example, fogging of car windows frequently occurs during summer storms or in cold weather. Currently, automotive anti-fog measures typically involve coating the inside of the window with an anti-fog layer or applying anti-fog film. However, coated anti-fog layers have poor anti-fog performance and a short lifespan. Anti-fog film generally performs better than anti-fog coatings; however, it is more difficult to apply and is prone to deformation during application, failing to meet usage requirements. Furthermore, air bubbles tend to form after a period of use, rendering it unusable. Multiple film replacements are necessary during the car's lifespan, causing significant inconvenience and financial loss for customers. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a long-lasting anti-fog optical transparent plate.

[0004] This invention is implemented as follows:

[0005] A long-lasting anti-fog optical transparent plate includes a transparent layer, an adhesive layer, and a functional plastic layer. The transparent layer is disposed on the outer side, and the two sides of the adhesive layer are respectively connected to the transparent layer and the functional plastic layer. The functional plastic layer is disposed on the inner side and includes an anti-fog film. A mold is disposed on one side of the functional plastic layer for curing treatment. The shape of the anti-fog film is reshaped by the mold so that a long-lasting anti-fog optical transparent plate that meets optical requirements is obtained after removing the mold.

[0006] Furthermore, in a preferred embodiment of the present invention, the mold includes a plate and a release film, the release film being disposed between the plate and the functional plastic layer; the mold is separated by the release film.

[0007] Furthermore, in a preferred embodiment of the present invention, the surface of the mold near the functional plastic layer has the same curvature as the transparent layer.

[0008] Furthermore, in a preferred embodiment of the present invention, the thickness of the anti-fog film is 1~500 μm.

[0009] Furthermore, in a preferred embodiment of the present invention, the thickness of the anti-fog film is 10~500 μm.

[0010] Furthermore, in a preferred embodiment of the present invention, the light transmittance of the anti-fog film is 70-95%.

[0011] Furthermore, in a preferred embodiment of the present invention, the hardness of the anti-fog film is 3B~9H.

[0012] Furthermore, in a preferred embodiment of the present invention, the haze of the anti-fog film is ≤2%, and the haze difference caused by wear is ≤2%.

[0013] Furthermore, in a preferred embodiment of the present invention, the transparent layer comprises one or more transparent plates, the transparent plates being made of plexiglass, inorganic glass, plastic, or a plastic-glass composite material, and the multiple transparent plates are fixed together by an adhesive.

[0014] Furthermore, in a preferred embodiment of the present invention, the functional plastic layer further includes an additional functional film disposed between the anti-fog film and the adhesive layer; the additional functional film is one or more of the following: privacy film, sunscreen film, color-changing film, heat insulation film, sound insulation film, projection film, and heating film.

[0015] Further, in a preferred embodiment of the present invention, the step of setting a mold on one side of the functional plastic layer for curing includes: setting a mold on one side of the functional plastic layer, sealing both sides of the transparent layer, adhesive layer, functional plastic layer and mold with a sealing ring, vacuuming, preheating, high temperature and high pressure treatment, and then cooling, depressurizing and removing the sealing ring; or,

[0016] Furthermore, in a preferred embodiment of the present invention, a mold is provided on one side of the functional plastic layer, and the transparent layer, adhesive layer, functional plastic layer and mold are cured by irradiation under an ultraviolet light source.

[0017] Furthermore, in a preferred embodiment of the present invention, the preheating temperature is 30~80℃ and the preheating time is 5~60 min; the high temperature and high pressure treatment temperature is 100~145℃ and the pressure is 10~13 atmospheres.

[0018] Furthermore, in a preferred embodiment of the present invention, the thickness T of the anti-fog film satisfies the following formula:

[0019] T=D×144.4×M×t×(Se / Sa) / (S×N H Where T is the thickness of the functional plastic layer in μm; D is the adjustment coefficient; M is the vehicle's maximum passenger capacity; t is the fogging time in min; and Se is the water overflow rate per minute in g / (cm³). 2 Sa is the rate of water per minute of percolation, expressed in g / (cm³). 2 ·min); S is the area of ​​the functional plastic layer, in cm² 2 N H The number of hydrogen bonds per unit volume N H The unit is mol / cm 3 .

[0020] The beneficial effects of the present invention include at least the following: the long-lasting anti-fog optically transparent plate obtained by the present invention through the above design has the following advantages:

[0021] (1) The functional plastic layer includes an anti-fog film. The anti-fog film is set on the inner side and has a long-lasting anti-fog effect. The anti-fog time can reach 0.5~12 h. After setting a mold on one side of the anti-fog film, it is cured. Through the action of the mold, the anti-fog film can be reshaped so that the anti-fog film and the transparent layer are perfectly bonded to obtain a transparent plate that meets the optical requirements.

[0022] (2) Because the material of the functional plastic layer is relatively light, when it is applied to car windows, it can greatly reduce the weight of the car, save energy and reduce emissions. Especially when applied to new energy vehicles, it can effectively increase the effective mileage of the car.

[0023] (3) The transparent plate has a transparent layer and a functional plastic layer. The rigid transparent layer and the flexible functional plastic layer make the product less prone to breakage.

[0024] (4) Using a transparent layer as the surface of the product provides a better tactile experience. The transparent layer and the functional plastic layer are fixed together by an adhesive layer to form an integrated structure. Compared with film products, it will not have adverse consequences such as product peeling or bubbles after long-term use. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a long-lasting anti-fog optical transparent plate provided in one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a long-lasting anti-fog optical transparent plate provided in another embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the mold for setting a long-lasting anti-fog optical transparent plate according to one embodiment of the present invention;

[0029] Figure 4 This is the preparation method flow of the long-lasting anti-fog optical transparent plate provided in the embodiments of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure for vacuuming during the curing of a long-lasting anti-fog optical transparent plate according to one embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the long-lasting anti-fog optical transparent plate provided in Embodiment 1 of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the long-lasting anti-fog optical transparent plate provided in Embodiment 2 of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the long-lasting anti-fog optical transparent plate provided in Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the structure of the long-lasting anti-fog optical transparent plate provided in Embodiment 4 of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] See Figure 1 As shown, this embodiment provides a long-lasting anti-fog optical transparent plate, including a transparent layer 10, an adhesive layer 20, and a functional plastic layer 30. The transparent layer 10 is disposed on the outer side, the functional plastic layer 30 is disposed on the inner side, and the adhesive layer 20 is disposed between the transparent layer 10 and the functional plastic layer 30 for connecting and fixing the transparent layer 10 and the functional plastic layer 30.

[0038] In this embodiment of the invention, the transparent layer 10 includes one or more transparent plates. Specifically, the transparent plate 11 can be made of plexiglass, inorganic glass, plastic, or glass-plastic composite material, etc. For example, in one embodiment, the transparent layer is a single layer of plexiglass or a single layer of inorganic glass.

[0039] In another embodiment of the invention, the transparent layer is a laminated glass plate, which can be prepared by coating an adhesive onto a glass plate, placing another glass plate on top, and then curing it. The laminated glass plate can also be a commercially available product. Using a laminated glass plate as the transparent layer can effectively improve the strength and safety of the product.

[0040] It is understood that in other embodiments, the transparent layer 10 may also be one or more layers of transparent plastic sheet or glass-plastic composite transparent sheet, or the transparent layer 10 may also include multiple layers of glass sheet and multiple layers of transparent plastic sheet. The glass-plastic composite material is specifically a composite sheet of glass sheet and plastic. For example, a plastic layer is coated on a glass sheet.

[0041] Furthermore, in embodiments of the present invention, the transparent layer 10 can be a planar transparent layer, a single-curved transparent layer, or a double-curved transparent layer. Transparent layers 10 with different curvatures allow the product to be used in different application scenarios, such as automotive windows and eyeglass lenses, effectively expanding the product's application range. The curvature of the functional plastic layer 30 is consistent with that of the transparent layer 10 to ensure that the transparent layer 10, the adhesive layer 20, and the functional plastic layer 30 form an integrated structure, improving the product's strength and rigidity. If the curvature of the functional plastic layer 30 differs from that of the transparent layer 10, it will cause refraction of the incident light, resulting in a transparent plate that does not meet optical requirements.

[0042] Specifically, in one embodiment of the present invention, the adhesive layer 20 may be polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), olefin elastomer (POE), thermoplastic polyurethane (TPU), ionic polymer, optically transparent adhesive (OCA), liquid optically transparent adhesive (LOCA), or optically transparent resin (OCR).

[0043] Using the aforementioned material as the adhesive layer 20, the two sides of the adhesive layer 20 are respectively bonded to the transparent layer 10 and the functional plastic layer 30, which can effectively fix the transparent layer 10 and the functional plastic layer 30 and improve the durability of the product.

[0044] See Figure 1 In an embodiment of the present invention, the functional plastic layer 30 includes an anti-fog film 31, the thickness of which is 1~1000 μm. More preferably, the thickness of the anti-fog film is 10~500 μm, for example, 100 μm, 200 μm, 350 μm, 400 μm, etc. At a thickness of 100~500 μm, the anti-fog time is longer and a better anti-fog effect can be achieved.

[0045] It is understandable that the anti-fog film 31 can be homemade or a commercially available product. The anti-fog film can be obtained by adding an anti-fog agent to polyethylene or polyvinyl chloride material. The anti-fog agent is hydrophilic, and the tiny liquid particles generated by atomization are absorbed by the anti-fog film 31, achieving the anti-fog effect.

[0046] Specifically, in one embodiment of the present invention, the surface layer of the anti-fog film is a superhydrophilic material. After absorbing water mist, a thin layer of water forms on the surface of the anti-fog film, preventing further penetration into the film. The thickness of the anti-fog film can be 1~100 μm, and can be adjusted according to actual usage requirements. Specifically, the superhydrophilic material is a material with a water contact angle θ less than or equal to 10°, such as a polymer material. The anti-fog agent can be obtained from the prior art, and this disclosure does not impose specific limitations.

[0047] Specifically, in another embodiment of the present invention, the anti-fogging agent in the anti-fogging film is a hydrophilic material, and this material has a saturation point for absorbing water mist. After reaching saturation, the anti-fogging film will no longer be able to absorb water mist. Specifically, the hydrophilic material is a material with a water contact angle θ between 10° and 60°. The anti-fogging agent can be obtained from the prior art, and this disclosure does not impose specific limitations.

[0048] Specifically, under saturation, the following equation (1) is satisfied:

[0049] S×T × 10 -4 ×N H ×M H ×(S a / S e =M×W×t+△W (1)

[0050] In this equation (1), the right-hand side is S, which represents the area of ​​the functional plastic layer, in cm². 2 T represents the thickness of the functional plastic layer, in μm; N H The number of hydrogen bonds per unit volume, expressed in mol / cm³. 3 S e The overflow rate of water per minute, expressed in g / (cm³). 2 ·min); M H This represents the relative molecular mass of a water molecule, specifically 18 g / mol; S a The rate of water permeation per minute, expressed in g / (cm³). 2 ·min); S e The overflow rate of water per minute, expressed in g / (cm³). 2 ·min). Among them, 144.4 is the dimension conversion and matching constant, used to unify the dimensions and match the thickness design requirements.

[0051] On the right side of equation (1): M is the number of passengers M, in p; W is the average exhaled water volume per person, with a value of 0.26 g / p·min; t is the fogging time, in min; the fogging time t is the time it takes for the anti-fog diaphragm to reach saturation. DW is the change in water volume caused by temperature difference.

[0052] During prolonged use, the change in water volume caused by temperature difference is much smaller than the change in water volume caused by occupant exhalation, and DW can be ignored. Therefore, the thickness T of the anti-fog diaphragm 31 satisfies the following formula:

[0053] T= D×144.4×M×t×(Se / Sa) / (S×N HWhere T is the thickness of the functional plastic layer in μm; M is the vehicle's passenger capacity; t is the fogging time in min; and Se is the water overflow rate per minute in g / (cm³). 2 Sa is the rate of water per minute of percolation, expressed in g / (cm³). 2 (·min); S is the area of ​​the functional plastic layer, in cm² 2 N H The number of hydrogen bonds per unit volume N H The unit is mol / cm 3 .

[0054] In equation (2), D is the adjustment coefficient, which ranges from 0.8 to 1.4. The adjustment coefficient can be determined based on experience. For example, when the application environment of the transparent plate is a long-term high temperature and high humidity environment (e.g., relative humidity greater than 80%), a higher value of adjustment coefficient can be selected, such as 1.3 to 1.4. If the application environment of the transparent plate is a long-term dry environment (e.g., relative humidity less than 30%), a lower value of adjustment coefficient can be selected, such as 0.8 to 1.0. When the application environment is a suitable humidity environment (e.g., relative humidity of 40 to 70%), the adjustment coefficient is selected as 1.0 to 1.3.

[0055] It should be noted that when calculating equation (2), the unit values ​​listed in equation (1) should be used.

[0056] The thickness of the anti-fog membrane can be determined by considering parameters such as the number of passengers allowed in the application scenario, the water overflow rate per minute, the water permeation rate per minute, and the area. This allows for the determination of the optimal membrane thickness and ensures long-lasting anti-fog performance.

[0057] Furthermore, in an embodiment of the present invention, the visible light transmittance of the anti-fog film 31 is 70-95%. The visible light transmittance can be measured, for example, according to the method in GB / T 5137.2-2002. At this visible light transmittance, the light transmission function of the transparent plate is ensured, meeting the usage requirements of applications such as automotive windows.

[0058] Further, in embodiments of the present invention, the haze of the anti-fog film 31 is less than or equal to 2%, more preferably 1.4-1.5%. Haze can be calculated, for example, as follows: when a beam of parallel light from a standard "C" light source is perpendicularly incident on transparent or translucent glass, the haze is the percentage of the scattered light flux Td (which deviates from the incident direction by more than 2.5º due to scattering within and on the surface of the material) to the light flux T2 transmitted through the material. Further, the haze difference caused by wear of the anti-fog film is ≤2%. That is, the haze of the anti-fog film after wear is ≤4%. Wear can be performed according to the method in GB5137.1.

[0059] Furthermore, in an embodiment of the present invention, the hardness of the functional plastic layer 30 is 3B to 9H. For example, the hardness of the functional plastic layer can be pencil hardness such as 3B, 2H, 4H, 6H, or 9H. This ensures that the functional plastic layer 30 has sufficient rigidity.

[0060] Furthermore, because the present invention employs a transparent layer-adhesive layer-functional plastic layer structure, when the outermost transparent layer is damaged, the broken transparent sheet will be blocked by the adhesive layer and the functional plastic layer, thus greatly improving the safety of the product.

[0061] Further, see Figure 2 In another embodiment of the present invention, the functional plastic layer 30 further includes an additional functional film 32, which is disposed between the anti-fog film 31 and the adhesive layer 20, ensuring that the anti-fog film 31 is on the inside to achieve the anti-fog effect. Specifically, the additional functional film 32 can be a privacy film, a sunscreen film, a color-changing film, a heat-insulating film, a sound-insulating film, a projection film, a heating film, etc. The specific materials of the aforementioned privacy film, sunscreen film, color-changing film, heat-insulating film, sound-insulating film, projection film, and heating film can be found in the prior art, and will not be described in detail here.

[0062] By adding an additional functional film 32 to the functional plastic layer 30, the long-lasting anti-fog optical transparent plate is endowed with more functions, such as privacy protection, heat insulation, and color-changing functions, thereby expanding the application scenarios of the optical transparent plate.

[0063] like Figure 3 As shown, in an embodiment of the present invention, a mold 40 is provided on one side of the functional plastic layer 30 for curing treatment. The mold 40 is used to reshape the shape of the anti-fog film so that a long-lasting anti-fog optical transparent plate that meets optical requirements can be obtained after removing the mold 40.

[0064] The anti-fog film 31 is made of a relatively soft material. If the bonding is unbalanced or shifts during the application of the anti-fog film, light will refract within the transparent plate, affecting its optical effect. By setting up a mold 40 and then curing the transparent layer 10, adhesive layer 20, functional plastic layer 30, and mold 40, the transparent layer 10, adhesive layer 20, and functional plastic layer 30 are firmly bonded together. Under the pressure of the mold 40, the anti-fog film 31 can be shaped to obtain a three-dimensional structure that meets optical requirements, ensuring the optical effect of the transparent plate.

[0065] Specifically, the mold 40 includes a plate 42 and a release film 41. The release film 41 is sandwiched between the plate 42 and the functional plastic layer 30, separating the mold 40 and the functional plastic layer 30 to facilitate separation of the mold 40 in subsequent steps. The release film 41 can be a PVC release film or a PET release film. Further, the release film can be of different specifications, such as a low-force release film with a release force of less than 10 g / inch, a medium-force release film with a release force of 10 to 50 g / inch, a heavy-force release film with a release force of 50 to 100 g / inch, and an ultra-heavy-force release film with a release force of 100 to 200 g / inch. The release film can be a silicone oil release film, a non-silicone release film, an antistatic release film, etc. The thickness of the PET substrate can be 25 to 100 micrometers, for example, 25, 50, 75, 100 micrometers, etc., and this invention does not impose specific limitations.

[0066] Specifically, please refer to Figure 4 The present invention provides a method for preparing the above-mentioned long-lasting anti-fog optical transparent plate, comprising:

[0067] S1, providing a transparent layer, the transparent layer comprising one or more transparent plates;

[0068] S2, Lay adhesive on the transparent layer to form an adhesive layer;

[0069] S3, an anti-fog film is placed on the adhesive layer to form a functional plastic layer, wherein the thickness of the anti-fog film is 10~1000 μm;

[0070] S4, place a mold on the functional plastic layer to obtain a preform;

[0071] S5, the preform is cured;

[0072] S6. Separate the mold to obtain a long-lasting anti-fog optical transparent plate.

[0073] Specifically, in one embodiment, in step S1, the transparent layer can be prepared by spreading adhesive on a first transparent plate and placing a second transparent plate on top to obtain the transparent layer.

[0074] Alternatively, in another embodiment, the transparent layer can be laminated glass. The laminated glass sheet can be formed by coating an adhesive layer on a glass sheet, placing another glass sheet on top, and then curing it. The laminated glass sheet can also be a commercially available product. Or, in yet another embodiment, the transparent layer can be a vehicle window. An adhesive layer, a functional plastic film, and a mold can be directly applied to the inner side of the vehicle window. After curing, the mold can be removed to obtain a long-lasting anti-fog vehicle window.

[0075] Furthermore, in this step, the adhesive used to fix the multilayer transparent panel can be one of PVB (polyvinyl butyral), EVA (ethylene-vinyl acetate copolymer), or POE (olefin elastomer). In automotive window applications, PVB or EVA is preferred as the adhesive. In photovoltaic transparent panel applications, EVA and POE are preferred as the adhesive.

[0076] Specifically, in one embodiment, in step S2, adhesive is laid flat on the transparent layer. It is necessary to keep the adhesive flat, for example, by using an electrostatic roller or other means to flatten the adhesive and remove the release film on the adhesive, so that an adhesive layer can be formed on the transparent layer.

[0077] Specifically, in this step, the adhesive can be polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), olefin elastomer (POE), thermoplastic polyurethane (TPU), ionic polymer, optically transparent adhesive (OCA), liquid optically transparent adhesive (LOCA), or optically transparent resin (OCR). Using the above materials as adhesives, the two sides of the adhesive layer are bonded to the transparent layer and the functional plastic film respectively, effectively fixing the transparent layer and the functional plastic film and improving the product's durability. Specifically, in one embodiment, in step S3, the functional plastic layer may further include an additional functional film, which can be a privacy film, sunscreen film, color-changing film, heat-insulating film, sound-insulating film, projection film, heating film, electrochromic film, etc. Step S3 may include: placing the additional functional film on the adhesive layer, then coating it with an adhesive layer, and then placing an anti-fog film to form the functional plastic layer.

[0078] Specifically, in one embodiment, in step S4, a mold is placed on the functional plastic layer to obtain a preform. Specifically, the mold can be a transparent mold or an opaque mold. Specifically, the transparent mold can be a glass mold, a transparent high-temperature resistant plastic mold, etc. The opaque mold can be a metal or plastic mold, etc. Preferably, in this embodiment, the mold is a transparent mold, which allows for better observation of the product. More preferably, the curvature of the mold and the transparent layer is the same in all directions, and the corresponding surfaces are parallel everywhere; the error is less than 1 micrometer. When the transparent layer is a curved surface, the smoothness of the curved surface of the transparent plate mold is ensured.

[0079] By adding a transparent mold to form the preform, the functional plastic layer can be better protected during subsequent curing steps, preventing damage to the functional plastic layer. Furthermore, in one embodiment, the transparent mold can form a concave-convex matching relationship with the transparent layer. The transparent mold can reshape the geometry of the anti-fog film, making it parallel to the transparent layer, forming a perfectly optically high-quality sandwich transparent panel. Through the contact between the transparent mold and the anti-fog film, the transparent layer / adhesive layer / anti-fog film / release film / panel form a complete whole during processing, preventing detachment and ensuring a high yield. After product molding, the transparent mold can be perfectly peeled off using the release film, ensuring a smooth surface for the anti-fog film and strictly controlling the optical distortion of the sandwich glass within enterprise, national, or international standards.

[0080] Furthermore, in one embodiment, step S5 involves curing the preform, including:

[0081] S51, the preform is sealed with a sealing ring, vacuumed, and preheated to obtain a semi-finished product. Specifically, as follows... Figure 5 As shown, the sealing ring is a rubber sealing ring 50 with a nozzle. The rubber sealing ring 50 completely seals the transparent layer 10, the adhesive layer 20, the functional plastic layer 30, and the mold 40. Vacuuming and preheating are performed through the nozzle on the rubber sealing ring 50, causing partial melting of the adhesive layer. The preheating temperature can be, for example, 30~80℃, and the preheating time can be, for example, 5~60 minutes. Vacuuming and preheating effectively remove air between the layers, improving the curing effect.

[0082] S52, the semi-finished product is subjected to high-temperature and high-pressure treatment. Preferably, in one embodiment, in step S52, the semi-finished product is placed in an autoclave for high-temperature and high-pressure treatment, wherein the temperature is 100~145℃ and the pressure is 10~13 atmospheres. For example, high-temperature and high-pressure treatment is performed at 125℃ and 12 atmospheres.

[0083] S53, after cooling and depressurization, remove the sealing ring.

[0084] In another embodiment of the present invention, step S5 can also be performed by photocuring. For example, when the adhesive layer is one or more of transparent optical adhesive, liquid transparent optical adhesive, and optically transparent resin, step S5, the step of curing the preform specifically includes: irradiating the preform under an ultraviolet light source to cure the adhesive layer.

[0085] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0086] Example 1

[0087] Please see Figure 6 This embodiment provides a long-lasting anti-fog optical transparent plate, which is obtained according to the following steps:

[0088] (1) Place the first piece of glass 61 on the assembly platform in the cleanroom, visually inspect it and blow, wipe and remove dust, and remove the static electricity with an electrostatic roller;

[0089] (2) Place PVB adhesive on the first piece of glass 61 and use an electrostatic roller to spread the adhesive as flat as possible to form an adhesive layer 62;

[0090] (3) Remove the protective film on the adhesive layer 62;

[0091] (4) Place an anti-fog film 63 (release film facing outwards) on the adhesive layer 62, aligning the edges;

[0092] (5) After removing the release film on the anti-fog film 63, place a transparent plate mold on the anti-fog film 63. The transparent plate mold includes a release film 64 and a glass plate 65.

[0093] (6) Use a rubber sealing ring with a nozzle to completely seal the glass 61-adhesive layer 62-anti-fog film 63-transparent plate mold;

[0094] (7) Vacuuming and preheating are performed, and the adhesive layer partially melts to form a semi-finished workpiece;

[0095] (8) Place the semi-finished workpiece into an autoclave, heat it to 125°C, and pressurize it to 12 atmospheres, and maintain it for 20 minutes;

[0096] (9) Cool, depressurize, and remove the rubber seal. Trim and check for defects such as bubbles.

[0097] (10) Separate the transparent plate mold from the release film 64 to obtain the long-lasting optical anti-fog transparent plate 60.

[0098] Example 2

[0099] Please refer to Figure 7 This embodiment provides a long-lasting anti-fog optical transparent plate, which is obtained according to the following steps:

[0100] (1) Place the first piece of glass 71 on the assembly platform in the cleanroom, visually inspect it and blow, wipe and remove dust, and remove the static electricity with an electrostatic roller;

[0101] (2) Place PVB adhesive on the first piece of glass 71 and use an electrostatic roller to spread the film as flat as possible to form an adhesive layer 72;

[0102] (3) Remove the protective film on the adhesive layer 72;

[0103] (4) Place the second piece of glass 73;

[0104] (5) Place PVB adhesive on the second glass 73 and use an electrostatic roller to spread the adhesive as flat as possible to form an adhesive layer 74;

[0105] (3) Remove the protective film on the adhesive layer 74;

[0106] (4) Place an additional functional film 75 (a color-changing film in this embodiment) on the adhesive layer 74, then apply PVB adhesive, flatten the film, and then place an anti-fog film 76 (release film facing outwards) with the edges aligned;

[0107] (5) After removing the release film on the anti-fog film 76, place a transparent plate mold on the anti-fog film 76. The transparent plate mold includes a release film 77 and a glass plate 78.

[0108] (6) Use a rubber sealing ring with a nozzle to completely seal the mold of the first glass 71-adhesive layer 72-second glass 73-adhesive layer 74-additional functional film 75-anti-fog film 76-transparent plate;

[0109] (7) Vacuuming and preheating are performed, and the adhesive layer partially melts to form a semi-finished workpiece;

[0110] (8) Place the semi-finished workpiece into an autoclave, heat it to 125°C, and pressurize it to 12 atmospheres, and maintain it for 20 minutes;

[0111] (9) Cool, depressurize, and remove the rubber seal. Trim and check for defects such as bubbles.

[0112] (10) Separate the transparent plate mold from the release film 77 to obtain the long-lasting optical anti-fog transparent plate 70.

[0113] Example 3

[0114] Please see Figure 8 This embodiment provides a long-lasting anti-fog optical transparent plate, which is obtained according to the following steps:

[0115] (1) Place the formed laminated glass 81 on the lamination platform in the cleanroom, visually inspect it and blow, wipe and remove dust, and remove static electricity with an electrostatic roller;

[0116] (2) Place PVB adhesive on the laminated glass and use an electrostatic roller to spread the film as flat as possible to form an adhesive layer 82;

[0117] (3) Remove the protective film on the adhesive layer 82;

[0118] (4) Place the anti-fog film 83 (release film facing outwards) on the adhesive layer 82, aligning the edges;

[0119] (5) After removing the release film on the anti-fog film 83, place a transparent plate mold on the anti-fog film 83. The transparent plate mold includes a release film 84 and a glass plate 85.

[0120] (6) Use a rubber sealing ring with a nozzle to completely seal the mold of laminated glass 81-adhesive layer 82-anti-fog film 83-transparent plate;

[0121] (7) Vacuuming and preheating are performed, and the adhesive layer partially melts to form a semi-finished workpiece;

[0122] (8) Place the semi-finished workpiece into an autoclave, heat it to 110°C, and pressurize it to 12 atmospheres, and maintain it for 20 minutes;

[0123] (9) Cool, depressurize, and remove the rubber seal. Trim and check for defects such as bubbles.

[0124] (10) Separate the transparent plate mold from the release film 84 to obtain the long-lasting optical anti-fog transparent plate 80.

[0125] Example 4

[0126] Please see Figure 9 This embodiment provides a long-lasting anti-fog optical transparent plate, which is obtained according to the following steps:

[0127] (1) Place glass 91 on the assembly platform in the cleanroom, visually inspect it and blow, wipe and remove dust, and remove static electricity with an electrostatic roller;

[0128] (2) Place OCA adhesive on glass 91 and use an electrostatic roller to spread the adhesive film as flat as possible to form an adhesive layer 92;

[0129] (3) Place the anti-fog film 93 (release film facing out) on the adhesive layer 92, aligning the edges;

[0130] (5) After removing the release film on the anti-fog film 93, place a transparent plate mold on the anti-fog film 93. The transparent plate mold includes a release film 94 and a glass plate 95.

[0131] (6) Turn on the ultraviolet light source switch to cure the light;

[0132] (7) Trim edges and check for defects such as bubbles;

[0133] (8) Separate the transparent plate mold from the release film 94 to obtain the long-lasting optical anti-fog transparent plate 90.

[0134] Long-lasting anti-fog optical transparent plates can be prepared using the above method and applied in fields such as automotive windows, eyeglasses, swimming goggles, and shopping mall windows. The preparation method is simple, and various parameters are easy to control, resulting in long-lasting anti-fog optical transparent plates with excellent performance. The anti-fog film has a light transmittance of 70-95%, a thickness of 10-1000 micrometers, a haze of <2%, a hardness of 3B-9H, an anti-fog time of 0.5-12 hours, and an anti-fog lifespan of more than 10 years. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A long-lasting anti-fog optical transparent plate, characterized in that, The system comprises a transparent layer, an adhesive layer, and a functional plastic layer. The transparent layer is disposed on the outer side. The adhesive layer is connected to the transparent layer and the functional plastic layer on both sides, respectively. The functional plastic layer is disposed on the inner side and includes an anti-fog film. The transparent layer is a single-curved or double-curved transparent layer. The curvature of the functional plastic layer is consistent with that of the transparent layer to ensure that the transparent layer, adhesive layer, and functional plastic layer form an integral structure. A mold is placed on one side of the functional plastic layer for curing. The shape of the anti-fog film is reshaped using the mold, so that a long-lasting anti-fog optical transparent plate meeting optical requirements is obtained after removing the mold. The mold includes a plate and a release film, the release film being disposed between the plate and the functional plastic layer; the mold is separated by the release film; the step of setting the mold on one side of the functional plastic layer for curing includes: setting the mold on one side of the functional plastic layer, sealing both sides of the transparent layer, adhesive layer, functional plastic layer and mold with sealing rings, vacuuming, preheating, high temperature and high pressure treatment, then cooling, depressurizing and removing the sealing rings; or, setting the mold on one side of the functional plastic layer, and curing the transparent layer, adhesive layer, functional plastic layer and mold under ultraviolet light. The thickness T of the anti-fog film satisfies the following formula: T = D × 144.4 × M × t × (S) e / S a ) / (S×N H ), where T is the thickness of the functional plastic layer, in μm; D is the adjustment coefficient; M is the vehicle's maximum passenger capacity; t is the fogging time, in min; S e The overflow rate of water per minute, expressed in g / (cm³). 2 ·min); S a The rate of water permeation per minute, expressed in g / (cm³). 2 ·min); S is the area of ​​the functional plastic layer, in cm² 2 N H The number of hydrogen bonds per unit volume N H The unit is mol / cm 3 ; where 144.4 is a dimension conversion and constant, used to unify dimensions and match thickness design requirements.

2. The long-lasting anti-fog optical transparent plate according to claim 1, characterized in that, The surface of the mold near the functional plastic layer maintains the same curvature as the transparent layer.

3. The long-lasting anti-fog optical transparent plate according to claim 1, characterized in that, The thickness of the anti-fog film is 1~1000 μm.

4. The long-lasting anti-fog optical transparent plate according to claim 3, characterized in that, The thickness of the anti-fog film is 10~500 μm.

5. The long-lasting anti-fog optical transparent plate according to claim 1, characterized in that, The light transmittance of the anti-fog film is 70-95%; and / or the hardness of the anti-fog film is 3B-9H; and / or the haze of the anti-fog film is ≤2%, and the haze difference caused by wear is ≤2%.

6. The long-lasting anti-fog optical transparent plate according to claim 1, characterized in that, The functional plastic layer further includes an additional functional film disposed between the anti-fog film and the adhesive layer; the additional functional film is one or more of the following: privacy film, sun protection film, color-changing film, heat insulation film, sound insulation film, projection film, and heating film.

7. The long-lasting anti-fog optical transparent plate according to claim 6, characterized in that, The preheating temperature is 30~80℃ and the preheating time is 5~60 min; the high temperature and high pressure treatment temperature is 100~145℃ and the pressure is 10~13 atmospheres.

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