Vehicle skylight sunshade curtain device

Abstract

The invention provides a vehicle skylight sunshade curtain device which comprises photochromic glass, glass rotating bearings are installed and connected to the two ends of the photochromic glass, a glass rotating connecting rod is installed between the glass rotating bearings, and a glass rotating motor is installed on the rear portions of the glass rotating bearings. A motor driving power supply is mounted at the rear part of the glass rotating motor; according to the sunshade curtain device, a primary sunshade curtain is achieved through photochromism, then complete sunshade is achieved through storage and release of sunshade curtain cloth, skylight glass is improved to be split photochromic glass, strong light can be prevented from entering the interior of an automobile while ventilation is achieved, illumination in the automobile can be achieved only by filtering part of light intensity, and the sunshade curtain device is convenient to use. Complete sun shading of the skylight is achieved through the electric sun shading curtain, the two-layer structure is matched with photochromism, the actual requirement of the skylight sun shading curtain is greatly met, illumination is guaranteed, meanwhile, damage of strong light to automobiles and personnel is avoided, and the technical application value is remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of skylight components, and particularly to a vehicle skylight sunshade device. Background Art

[0002] The skylight sunshade assembly is a mechanism applied to automobiles to block the sunlight entering through the skylight glass for passengers near the skylight. Especially, panoramic skylights are increasingly adopted by more and more automobiles. The sunlight will directly shine on the entire interior of the vehicle. Especially in sunny weather, it will cause discomfort to passengers. Here, the application of the skylight sunshade assembly is very necessary.

[0003] Conventionally used sunshades all use the roller blind mode to completely block sunlight. However, some sunlight is still needed for lighting and even ventilation inside the vehicle. This requires using glass with a certain light transmittance instead of a roller blind. However, the conventionally used glass cannot automatically change color to change the light transmittance to achieve the sunshade effect. Therefore, it is urgent to design a kind of chromogenic glass to achieve the light transmission and sunshade effects. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the main purpose of the present invention is to provide a vehicle skylight sunshade device. The sunshade device achieves preliminary sunshading through photochromism, and then achieves complete sunshading through the storage and release of the sunshade cloth. By improving the skylight glass into a split-type photochromic glass, it can block strong light from entering the vehicle interior while realizing ventilation, and only filter part of the light intensity, which is beneficial to realizing the lighting inside the vehicle. The complete sunshading of the skylight is achieved through an electric sunshade. The two-layer structure is combined with photochromism, greatly improving the actual demand of the skylight sunshade, ensuring lighting while avoiding the harm of strong light to the vehicle and personnel, and having significant technical application value.

[0005] To achieve the purpose of the present invention, the technical solution adopted is: A vehicle sunroof sunshade device includes a photochromic glass. Both ends of the photochromic glass are installed and connected with glass rotating bearings. A glass rotating connecting rod is installed between the glass rotating bearings. A glass rotating motor is installed at the rear of the glass rotating bearing, and a motor driving power supply is installed at the rear of the glass rotating motor. The photochromic glass includes a photochromic film plate arranged in the middle. An ultraviolet light polarization upper film plate and an ultraviolet light polarization lower film plate are respectively attached to the upper and lower sides of the photochromic film plate. High-purity light-transmitting glass plates are attached to the upper side of the ultraviolet light polarization upper film plate and the lower side of the ultraviolet light polarization lower film plate. A color-changing glass protective film is wrapped around the outer surface of the high-purity light-transmitting glass plate. A retractable sunshade is installed at the lower part of the photochromic glass. A sunshade protective edge is wrapped around the outer peripheral side of the retractable sunshade. One end of the retractable sunshade is installed with a sunshade storage box, and the other end is installed with a traction rope storage box. The traction rope storage box is directly connected to the sunshade protective edge through a sunshade traction.

[0006] Preferably, a color-changing glass installation card sleeve is wrapped around the outer peripheral side of the photochromic glass, and the photochromic glass is installed on the sunroof sunshade installation frame through the color-changing glass installation card sleeve.

[0007] Preferably, color-changing glass buffer protection adhesives are installed on both sides of the color-changing glass protective film, and the color-changing glass protective film is fixedly connected to the color-changing glass installation card sleeve through the color-changing glass buffer protection adhesives.

[0008] Preferably, a sunshade installation frame is connected between the traction rope storage box and the sunshade storage box, and the sunshade installation frame is fixedly connected to the lower side of the sunroof sunshade installation frame.

[0009] Preferably, a sunshade storage reel is installed in the sunshade storage box, and a sunshade rotating connecting rod is installed in the sunshade storage reel.

[0010] Preferably, the sunshade rotating connecting rod in the sunshade storage reel in the sunshade storage box is directly connected to the sunshade rotating storage motor, and the sunshade rotating connecting rod in the sunshade storage reel in the traction rope storage box is directly connected to the traction rope rotating storage motor.

[0011] Preferably, the photochromic film plate includes the following components in parts by weight: 10-40 parts of poly(4-methyl-1-pentene), 10-30 parts of polymethyl methacrylate, 10-20 parts of polyethylene terephthalate, 10-30 parts of liquid silicone rubber, 20-50 parts of fluorinated ethylene propylene, 1-5 parts of spiropyran-based photochromic dye, 1-5 parts of diarylethene-based photochromic dye, 0.1-0.2 part of AgCl, 0.1-0.15 part of AgBr, 0.1-0.15 part of CuCl, and 10-50 parts of organic solvent.

[0012] Preferably, the method for preparing the photochromic template comprises the following steps: First, an organic solvent is mixed with poly(4-methyl-1-pentene), polymethyl methacrylate, polyethylene terephthalate, liquid silicone rubber, fluorinated ethylene propylene in a dissolution tank, and then heated to 70 - 80 °C and stirred until completely dissolved. Then, it is transferred to an ultrasonic kettle at a constant temperature for ultrasonic mixing. Next, pyran-based photochromic dyes and diarylethene-based photochromic dyes are added thereto while ultrasonicating to completely dissolve the color-changing dyes. Finally, AgCl, AgBr, and CuCl are added and ultrasonicated until the solution is completely mixed and homogenized into a transparent suspension; 95 - 98% by weight of the suspension is transferred to a smelting machine for low-temperature smelting. During low-temperature smelting, it is ensured that the organic solvent does not volatilize. After smelting, it is extruded by low-temperature melting and a photochromic film is prepared through a double-sided stretching process. After polishing and modification, the remaining suspension is uniformly coated on the surface of the photochromic film to form a photochromic template.

[0013] The present invention provides a vehicle sunroof sunshade curtain device, which has the following advantages: The sunshade curtain device of the present invention realizes a preliminary sunshade curtain through photochromism, and then realizes complete sunshading through the storage and release of the sunshade curtain cloth. By improving the sunroof glass into a split-type photochromic glass, it can block strong light from entering the car interior while achieving ventilation, and only filter part of the light intensity, which is beneficial to realizing the illumination inside the car. The complete sunshading of the sunroof is realized through an electric sunshade curtain. The two-layer structure is combined with photochromism, which greatly improves the actual demand of the sunroof sunshade curtain, ensures illumination while avoiding the harm of strong light to the car and personnel, and has significant technical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a top view structural schematic diagram of the first layer of the vehicle sunroof sunshade curtain device of the present invention.

[0015] Figure 2 is a top view structural schematic diagram of the second layer of the vehicle sunroof sunshade curtain device of the present invention Figure 2 .

[0016] Figure 3 is a side view structural schematic diagram of the photochromic glass of the vehicle sunroof sunshade curtain device of the present invention.

[0017] Figure 4 is a cross-sectional view structural schematic diagram of the photochromic glass of the vehicle sunroof sunshade curtain device of the present invention.

[0018] In the figure: 1. Installation bracket of sunshade curtain for skylight; 2. Motor drive power supply; 3. Photochromic glass; 4. Installation cartridge for chromatic glass; 5. Glass rotation motor; 6. Glass rotation connecting rod; 7. Glass rotation bearing; 8. Photochromic film plate; 9. Upper ultraviolet polarization film plate; 10. Lower ultraviolet polarization film plate; 11. High-clear light-transmitting glass plate; 12. Protective film for chromatic glass; 13. Buffer protection glue for chromatic glass; 14. Installation bracket of sunshade curtain; 15. Storage box for towing rope; 16. Storage box for sunshade curtain; 17. Storage reel for sunshade curtain; 18. Sunshade curtain rotation connecting rod; 19. Sunshade curtain rotation storage motor; 20. Towing rope rotation storage motor; 21. Towing rope for sunshade curtain; 22. Protective edging for sunshade curtain; 23. Retractable sunshade curtain. Detailed implementation mode

[0019] The present invention will be further described and explained below in conjunction with specific embodiments and the accompanying drawings of the specification.

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Embodiment 1

[0022] As Figure 1 、 2 shown, a sunshade curtain device for a vehicle skylight includes a photochromic glass 3. Both ends of the photochromic glass 3 are installed and connected with glass rotation bearings 7. A glass rotation connecting rod 6 is installed between the glass rotation bearings 7. A glass rotation motor 5 is installed at the rear of the glass rotation bearing 7. A motor drive power supply 2 is installed at the rear of the glass rotation motor 5; A chromatic glass installation cartridge 4 is wrapped around the outer peripheral side of the photochromic glass 3, and the photochromic glass 3 is installed on the skylight sunshade curtain installation bracket 1 by being clamped through the chromatic glass installation cartridge 4.

[0023] As Figure 3As shown in the figure, a sunshade curtain device for a vehicle sunroof. The photochromic glass 3 includes a photochromic film plate 8 disposed in the middle. An ultraviolet light polarizing upper film plate 9 and an ultraviolet light polarizing lower film plate 10 are respectively adhered to the upper and lower sides of the photochromic film plate 8. High-purity light-transmitting glass plates 11 are adhered to the upper side of the ultraviolet light polarizing upper film plate 9 and the lower side of the ultraviolet light polarizing lower film plate 10. A color-changing glass protective film 12 is wrapped around the outer surface of the high-purity light-transmitting glass plate 11. Color-changing glass buffer protection adhesives 13 are installed on both sides of the color-changing glass protective film 12. The color-changing glass protective film 12 is fixedly connected to the color-changing glass mounting card sleeve 2 through the color-changing glass buffer protection adhesives 13.

[0024] As Figure 4 shown in the figure, a sunshade curtain device for a vehicle sunroof. A retractable sunshade curtain 23 is installed at the lower part of the photochromic glass 3. A sunshade curtain protective edging 22 is wrapped around the outer peripheral side of the retractable sunshade curtain 23. A sunshade curtain storage box 16 is installed at one end of the retractable sunshade curtain 23, and a traction rope storage box 15 is installed at the other end. The traction rope storage box 15 is directly connected to the sunshade curtain protective edging 22 through a sunshade curtain traction rope 21. A sunshade curtain mounting bracket 14 is connected between the traction rope storage box 15 and the sunshade curtain storage box 16.

[0025] As Figure 4 shown in the figure, a sunshade curtain device for a vehicle sunroof. The sunshade curtain mounting bracket 14 is fixedly connected to the lower side of the sunroof sunshade curtain mounting bracket 1. A sunshade curtain storage reel 17 is installed in the sunshade curtain storage box 16. A sunshade curtain rotating link 18 is installed in the sunshade curtain storage reel 17. The sunshade curtain rotating link 18 in the sunshade curtain storage reel 17 in the sunshade curtain storage box 16 is directly connected to a sunshade curtain rotating storage motor 19. The sunshade curtain rotating link 18 in the sunshade curtain storage reel 17 in the traction rope storage box 15 is directly connected to a traction rope rotating storage motor 20.

[0026] Furthermore, the photochromic film plate 8 includes the following components in parts by weight: 10 parts of poly(4-methyl-1-pentene), 10 parts of polymethyl methacrylate, 10 parts of polyethylene terephthalate, 10 parts of liquid silicone rubber, 20 parts of fluorinated ethylene propylene, 2.4 parts of spiropyran-based photochromic dye, 2.3 parts of diarylethene-based photochromic dye, 0.1 part of AgCl, 0.1 part of AgBr, 0.1 part of CuCl, and 35 parts of organic solvent.

[0027] Furthermore, the preparation method of the photochromic film plate 8 includes the following steps: First, mix the organic solvent with poly(4-methyl-1-pentene), polymethyl methacrylate, polyethylene terephthalate, liquid silicone rubber, fluorinated ethylene propylene in a dissolution tank, then heat it up to 70 - 80 °C, stir until completely dissolved, and transfer it to an ultrasonic reactor at a constant temperature for ultrasonic mixing. Then, add pyran-based photochromic dyes and diarylethene-based photochromic dyes while ultrasonicating to make the chromogenic dyes completely dissolved. Finally, add AgCl, AgBr, and CuCl, and ultrasonicate until the solution is completely mixed and homogenized into a transparent suspension; Transfer 95% by weight of the suspension to a smelting machine for low-temperature smelting. During low-temperature smelting, ensure that the organic solvent does not volatilize. After smelting, extrude it at low temperature and prepare a chromogenic film through a biaxial stretching process. After polishing and modification, evenly coat the remaining suspension on the surface of the chromogenic film to form a photochromic film plate 8.

[0028] During operation, when the skylight sunshade needs to be activated, first start the glass rotation motor 5 installed on the skylight sunshade mounting bracket 1. The glass rotation motor 5 is provided with rotational power by the motor drive power supply 2. The glass rotation motor 5 drives the glass rotation connecting rod 6 to rotate in the glass rotation bearing 7, and the glass rotation bearing 7 drives the photochromic glass 3 to rotate. The rotation angle of the glass rotation connecting rod 6 is 0 - 180°. When the glass rotation connecting rod 6 rotates to 90°, all the photochromic glasses 3 will be perpendicular to the automobile skylight. At this time, the skylight is equivalent to being opened, and ventilation can be achieved; The photochromic film plate 8 inside the photochromic glass 3 changes color under the action of sunlight, making the photochromic film plate 8 darker, which is beneficial to blocking sunlight from passing through the photochromic glass 3 into the interior of the automobile. At the same time, start the sunshade rotation and storage motor 19 and the traction rope rotation and storage motor 20 on the lower side sunshade mounting bracket 14 of the skylight sunshade mounting bracket 1. The sunshade rotation and storage motor 19 rotates clockwise, and stores the sunshade protection edge 22 and the retractable sunshade 23 on the sunshade storage reel 17 in the sunshade storage box 16. The traction rope rotation and storage motor 20 rotates clockwise synchronously, and releases the sunshade traction rope 21 in the traction rope storage box 15 to realize the opening of the sunshade. At this time, air can completely enter the interior of the automobile; When the sunshade needs to be closed, the glass rotation motor 5 drives the glass rotation connecting rod 6 to rotate in the glass rotation bearing 7, rotating all the photochromic glass 3 to the horizontal position. At this time, the color-changing glass buffer protection glue 13 on the photochromic glass 3 plays a buffering role between the photochromic glass 3, and the photochromic film plate 8 inside it changes color under the action of sunlight, making the photochromic film plate 8 darker, which is beneficial to blocking sunlight. If complete sunshade is required, start the sunshade rotation storage motor 19 and the traction rope rotation storage motor 20 to rotate counterclockwise. The traction rope rotation storage motor 20 drives the sunshade traction rope 21 in the traction rope storage box 15 to be stored, and then drives the sunshade protection edge 22 on the sunshade storage reel 17 in the sunshade storage box 16 and the retractable sunshade 23 to be released to achieve complete sunshade. Example 2

[0029] The difference between this embodiment and Embodiment 1 is as follows: The photochromic film plate 8 comprises the following components in parts by weight: 10 parts of poly(4-methyl-1-pentene), 10 parts of polymethyl methacrylate, 10 parts of polyethylene terephthalate, 10 parts of liquid silicone rubber, 30 parts of fluorinated ethylene propylene, 4 parts of spiropyran-based photochromic dye, 2.5 parts of diarylethene-based photochromic dye, 0.2 part of AgCl, 0.15 part of AgBr, 0.15 part of CuCl, and 33 parts of organic solvent.

[0030] Furthermore, the preparation method of the photochromic film plate 8 comprises the following steps: First, mix the organic solvent with poly(4-methyl-1-pentene), polymethyl methacrylate, polyethylene terephthalate, liquid silicone rubber, and fluorinated ethylene propylene in a dissolution tank, then heat it up to 70 - 80 °C, stir until completely dissolved, transfer it to an ultrasonic kettle at a constant temperature for ultrasonic mixing, and then add the spiropyran-based photochromic dye and diarylethene-based photochromic dye while ultrasonicating to make the color-changing dyes completely dissolved. Finally, add AgCl, AgBr, and CuCl, and ultrasonicate until the solution is completely mixed and uniform to form a transparent suspension; Transfer 98% by weight of the suspension to a smelting machine for low-temperature smelting, ensuring that the organic solvent does not volatilize during low-temperature smelting. After smelting, extrude it at a low temperature and prepare a color-changing film through a double-sided stretching process. After polishing and modification, evenly coat the remaining suspension on the surface of the color-changing film to form the photochromic film plate 8. Example 3

[0031] The difference between this embodiment and Embodiments 1 and 2 is as follows: The photochromic template 8 comprises the following components in parts by weight: 20 parts of poly(4-methyl-1-pentene), 10 parts of polymethyl methacrylate, 10 parts of polyethylene terephthalate, 10 parts of liquid silicone rubber, 20 parts of fluorinated ethylene propylene, 3 parts of spiropyran-based photochromic dye, 2.6 parts of diarylethene-based photochromic dye, 0.2 part of AgCl, 0.1 part of AgBr, 0.1 part of CuCl, and 34 parts of organic solvent.

[0032] Furthermore, the preparation method of the photochromic template 8 comprises the following steps: First, the organic solvent is mixed with poly(4-methyl-1-pentene), polymethyl methacrylate, polyethylene terephthalate, liquid silicone rubber, and fluorinated ethylene propylene in a dissolution tank, and then the temperature is raised to 70-80 °C and stirred until completely dissolved. Then, it is transferred to an ultrasonic reactor at a constant temperature for ultrasonic mixing. Next, the spiropyran-based photochromic dye and the diarylethene-based photochromic dye are added while ultrasonicating to make the color-changing dyes completely dissolve. Finally, AgCl, AgBr, and CuCl are added and ultrasonicated until the solution is completely mixed and homogenized into a transparent suspension. 96% by weight of the suspension is transferred to a smelting machine for low-temperature smelting. During low-temperature smelting, it is ensured that the organic solvent does not volatilize. After smelting, it is extruded by low-temperature melting, and a color-changing film is prepared by a double-sided stretching process. After polishing and modification, the remaining suspension is evenly coated on the surface of the color-changing film to form the photochromic template 8.

[0033] In the present invention, the sunshade device achieves a preliminary sunshade through photochromism, and then achieves a complete sunshade through the storage and release of the sunshade cloth. By improving the skylight glass into a split-type photochromic glass, it can block strong light from entering the interior of the car while achieving ventilation, and only filters part of the light intensity, which is beneficial to realizing the illumination inside the car. The complete sunshade of the skylight is achieved through an electric sunshade. The two-layer structure is combined with photochromism, greatly improving the actual demand for the skylight sunshade, ensuring illumination while avoiding the harm of strong light to the car and personnel, and having significant technical application value.

[0034] The technical solutions disclosed in the embodiments of the present invention have been introduced in detail above. Specific embodiments are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A vehicle sunroof sunshade device, characterized in that: The invention comprises a photochromic glass (3), wherein glass rotating bearings (7) are installed and connected at both ends of the photochromic glass (3), a glass rotating connecting rod (6) is installed between the glass rotating bearings (7), a glass rotating motor (5) is installed at the rear of the glass rotating bearing (7), and a motor driving power supply (2) is installed at the rear of the glass rotating motor (5); The photochromic glass (3) comprises a photochromic film plate (8) arranged in the middle, an upper ultraviolet polarizing film plate (9) and a lower ultraviolet polarizing film plate (10) are respectively bonded to the upper and lower sides of the photochromic film plate (8), a high-clear light-transmitting glass plate (11) is bonded to the upper side of the upper ultraviolet polarizing film plate (9) and the lower side of the lower ultraviolet polarizing film plate (10), and a photochromic glass protective film (12) is wrapped around the outer surface of the high-clear light-transmitting glass plate (11); A retractable sunshade (23) is installed at the lower part of the photochromic glass (3); the outer peripheral side of the retractable sunshade (23) is wrapped with a sunshade protective edging (22); a sunshade storage box (16) is installed at one end of the retractable sunshade (23); and a traction rope storage box (15) is installed at the other end; the traction rope storage box (15) is directly connected to the sunshade protective edging (22) via a sunshade traction rope (21).

2. The vehicle sunroof sunshade device according to claim 1, characterized in that: The outer peripheral side of the photochromic glass (3) is wrapped with a photochromic glass installation sleeve (4), and the photochromic glass (3) is mounted on the skylight sunshade installation frame (1) by means of the photochromic glass installation sleeve (4).

3. The vehicle sunroof sunshade device according to claim 1 or 2, characterized in that: Color-changing glass buffer protection glue (13) is installed on both sides of the color-changing glass protection film (12), and the color-changing glass protection film (12) is fixedly connected to the color-changing glass installation sleeve (2) through the color-changing glass buffer protection glue (13).

4. The vehicle sunroof sunshade device according to claim 1 or 2, characterized in that: A sunshade curtain mounting frame (14) is connected between the traction rope storage box (15) and the sunshade curtain storage box (16), and the sunshade curtain mounting frame (14) is fixedly connected to the lower side of the skylight sunshade curtain mounting frame (1).

5. The vehicle sunroof sunshade device according to claim 4, characterized in that: A sunshade storage drum (17) is installed in the sunshade storage box (16), and a sunshade rotating connecting rod (18) is installed in the sunshade storage drum (17).

6. The vehicle sunroof sunshade device according to claim 5, characterized in that: The sunshade rotating connecting rod (18) in the sunshade storage drum (17) in the sunshade storage box (16) is directly connected to the sunshade rotating storage motor (19), and the sunshade rotating connecting rod (18) in the sunshade storage drum (17) in the traction rope storage box (15) is directly connected to the traction rope rotating storage motor (20).

7. The vehicle sunroof sunshade device according to claim 1, characterized in that: The photochromic film (8) comprises the following components in parts by weight: 10-40 parts of poly-4-methyl-1-pentene, 10-30 parts of polymethyl methacrylate, 10-20 parts of polyethylene terephthalate, 10-30 parts of liquid silicone rubber, 20-50 parts of fluorinated ethylene propylene, 1-5 parts of spiropyran photochromic dye, 1-5 parts of diarylethene photochromic dye, 0.1-0.2 parts of AgCl, 0.1-0.15 parts of AgBr, 0.1-0.15 parts of CuCl, and 10-50 parts of an organic solvent.

8. The vehicle sunroof sunshade device according to claim 7, characterized in that: The method for preparing the photochromic film plate (8) comprises the following steps: First, an organic solvent is mixed with poly-4-methyl-1-pentene, polymethyl methacrylate, polyethylene terephthalate, liquid silicone rubber, and fluorinated ethylene propylene in a dissolving tank, and then the temperature is raised to 70-80°C, and the mixture is stirred until completely dissolved. The mixture is then transferred to an ultrasonic kettle at a constant temperature for ultrasonic mixing, and then pyran photochromic dyes and diarylethene photochromic dyes are added thereto while ultrasonicating to completely dissolve the photochromic dyes. Finally, AgCl, AgBr, and CuCl are added, and the mixture is ultrasonicated until the solution is completely mixed and uniformly becomes a transparent suspension. 95-98% by weight of the suspension is transferred to a melting machine for low-temperature melting, while ensuring that the organic solvent does not volatilize. After melting, it is low-temperature melted and extruded, and a photochromic film is prepared by a double-sided stretching process. After polishing and modification, the remaining suspension is evenly coated on the surface of the photochromic film to form a photochromic film plate (8).

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