Steady-state low-light-transmittance dimming film and dimming glass

Abstract

According to the technical scheme, the steady-state low-light-transmittance dimming film is characterized by comprising a first transparent substrate, a first transparent conducting layer, a first active layer, a bonding layer, a second active layer, a second transparent conducting layer and a second transparent substrate which are arranged in a stacked mode, and the steady-state light transmittance of the dimming film formed by the components is smaller than or equal to 0.5%. By changing the internal structure of the light adjusting film, the whole light adjusting film has low-steady-state light transmittance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a light adjusting technology field especially is related to a steady state low transmittance light adjusting film and light adjusting glass. BACKGROUND

[0002] The light adjusting film is a light control device, mainly setting the light adjusting active layer in the middle of two transparent conductive films, and the light adjusting film types include the suspended particle (SPD) light adjusting film, the polymer dispersed liquid crystal (PDLC) light adjusting film and the electrochromic (EC) light adjusting film.

[0003] Although the light adjusting film has been developed for many years, for the UV curing type light adjusting film, the steady state of the light adjusting film is dark state, the dark state transmittance is higher, generally more than 0.5%, the shielding light transmittance performance of the light adjusting film is poor, thereby limiting the application field of the light adjusting film.

[0004] It can be seen that the steady state transmittance of the UV curing type light adjusting film with steady state dark state is higher in the prior art. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model aims at providing a steady state low transmittance light adjusting film to change the problem of high steady state transmittance of the light adjusting film.

[0006] The technical scheme of the utility model is a steady state low transmittance light adjusting film, characterized by comprising the first transparent substrate, the first transparent conductive layer, the first active layer, the adhesive layer, the second active layer, the second transparent conductive layer and the second transparent substrate which are arranged in layers, and the steady state transmittance of the light adjusting film formed by the above components is less than or equal to 0.5%.

[0007] Preferably, the steady state transmittance of the light adjusting film is less than or equal to 0.3%.

[0008] Preferably, the bright state transmittance of the light adjusting film is greater than or equal to 5%.

[0009] Preferably, the light state transmittance of the light control film is ≥15%.

[0010] Preferably, the light state transmittance of the light control film is ≥20%.

[0011] Preferably, the thickness of the adhesive layer is 0.5-20 μm.

[0012] Preferably, the thickness of the adhesive layer is 1-10 μm.

[0013] Preferably, the first active layer and the second active layer are each independently selected from one of a suspended particle active layer, a polymer dispersed liquid crystal active layer, and an electrochromic layer.

[0014] Preferably, the first active layer and the second active layer are each independently selected from a suspended particle active layer.

[0015] Preferably, the first transparent conductive layer and the second transparent conductive layer are each independently selected from one of an ITO conductive layer, an FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano-Ag wire conductive layer, conductive graphene, a conductive polymer, and a nano-Cu wire conductive layer.

[0016] Preferably, the first transparent substrate and the second transparent substrate are transparent plastic sheets.

[0017] A steady-state low transmittance light control glass, characterized in that it comprises a first transparent glass, a second transparent glass, and the above steady-state low transmittance light control film arranged between the first transparent glass and the second transparent glass.

[0018] Preferably, a first adhesive layer is arranged between the first transparent glass and the light control film, and / or a second adhesive layer is arranged between the second transparent glass and the light control film.

[0019] Preferably, the material of the first adhesive layer and the second adhesive layer is selected from one of an EVA adhesive film, a TPU adhesive film, and a PVB adhesive film.

[0020] Preferably, the first transparent glass and the second transparent glass are selected from one of inorganic glass and organic glass.

[0021] The present utility model discloses a kind of steady-state low transmittance light control films, including first transparent glass, second transparent glass and the light control film arranged between first transparent glass and second transparent glass. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a kind of structural schematic diagram of the light control film of the present utility model;

[0023] Figure 2 It is a kind of structural schematic diagram of the light control glass of the present utility model;

[0024] Wherein: 1 - first transparent substrate; 2 - first transparent conductive layer; 3 - first active layer; 4 - adhesive layer; 5 - second active layer; 6 - second transparent conductive layer; 7 - second transparent substrate; 8 - first transparent glass; 9 - second transparent glass; 10 - first interlayer; 11 - second interlayer. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail in connection with the drawings.

[0026] As Figure 1 Indicated, the utility model provides a steady state low light transmittance dimming film, including laminatedly arranged first transparent substrate 1, first transparent conductive layer 2, first active layer 3, adhesive layer 4, second active layer 5, second transparent conductive layer 6, second transparent substrate 7, the steady state light transmittance of the dimming film of above-mentioned component constitutes is 0.5%.

[0027] Specifically, the steady state light transmittance of the dimming film is less than or equal to 0.3%.

[0028] In the above-mentioned scheme, the bright state light transmittance of the dimming film is greater than or equal to 5%.

[0029] Specifically, the bright state light transmittance of the dimming film is greater than or equal to 15%.

[0030] Specifically, the bright state light transmittance of the dimming film is greater than or equal to 20%.

[0031] Wherein, the thickness range of the adhesive layer 4 is 0.5-20 μm.

[0032] Wherein, the thickness range of the adhesive layer 4 is 1-10 μm.

[0033] In addition, the first active layer 3 and the second active layer 5 are each independently selected from one of a suspended particle active layer, a polymer dispersed liquid crystal active layer and an electrochromic active layer.

[0034] Specifically, the first active layer and the second active layer are each independently selected from a suspended particle active layer.

[0035] In addition, the first transparent conductive layer 2 and the second transparent conductive layer 6 are each independently selected from one of an ITO conductive layer, an FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano Ag wire conductive layer, conductive graphene, conductive polymer and a nano Cu wire conductive layer.

[0036] Further, the first transparent substrate 1 and the second transparent substrate 7 are transparent plastic sheets.

[0037] As Figure 2The utility model provides a kind of steady-state low light transmittance light control glass, comprising: first transparent glass 8, second transparent glass 9, the above-mentioned steady-state low light transmittance light control film being arranged between the first transparent glass 8 and second transparent glass 9, the steady-state light transmittance of the light control film of the above-mentioned component constitutes is 0.5%.

[0038] On the basis of the above-mentioned scheme, the first transparent glass 8 and the light control film are provided with the first interlayer 10, and / or the second transparent glass 9 and the light control film are provided with the second interlayer 11.

[0039] Specifically, the material of the first interlayer 10 and the second interlayer 11 is selected from one of EVA adhesive film, TPU adhesive film and PVB adhesive film.

[0040] Specifically, the first transparent glass 8 and the second transparent glass 9 are selected from one of inorganic glass and organic glass.

[0041] In the utility model, the following terms used have the meanings as defined below.

[0042] The steady state of the light control film is the light transmittance state of the light control film without applying electric field / current. Generally, the steady state of the suspended particle light control film and the polymer dispersed liquid crystal light control film is dark state, and the steady state of the electrochromic light control film is bright state. Of course, the steady state of the suspended particle light control film and the polymer dispersed liquid crystal light control film can also be bright state, and the steady state of the electrochromic light control film can also be dark state.

[0043] The dark state of the light control film is the state with the minimum light transmittance.

[0044] The bright state of the light control film is the state with the maximum light transmittance.

[0045] The transition state of the light control film is the state with the light transmittance between the dark state and the bright state.

[0046] The transparent conductive film is the laminate of the transparent substrate and the transparent conductive layer.

[0047] In addition, the preparation method of the steady-state low light transmittance light control film in the utility model comprises the following steps:

[0048] Step a, on the transparent conductive layer side of a piece of transparent conductive film, coat the active layer precursor, and UV cure the active layer precursor to obtain the laminate of the transparent conductive film and the active layer,

[0049] Step b, coating an adhesive layer precursor on the active layer side of the active layer precursor obtained in step a,

[0050] Step c, laminating the active layer precursor obtained in step b and the adhesive layer precursor obtained in step a,

[0051] Step d, heat curing the laminated product of step c;

[0052] Or,

[0053] Step a, coating an active layer precursor on the transparent conductive layer side of a transparent conductive film, coating an adhesive layer precursor, UV curing the active layer precursor, obtaining a laminated product of the transparent conductive film, the active layer and the adhesive layer precursor,

[0054] Step b, coating an active layer precursor on the transparent conductive layer side of a transparent conductive film,

[0055] Step c, laminating the active layer precursor obtained in step b and the adhesive layer precursor obtained in step a,

[0056] Step d, UV curing the active layer precursor of step c, heat curing the adhesive layer of step c.

[0057] In the above preparation method, the active layer precursor is selected from a suspended particle active layer precursor, a polymer dispersed liquid crystal active layer precursor, and an electrochromic active layer precursor.

[0058] In the above preparation method, the adhesive layer precursor is selected from a heat-curable transparent optical adhesive.

[0059] In the above preparation method, the refractive index of the adhesive layer precursor matches the refractive index of the active layer precursor, and the difference between the refractive indices is not more than 0.01.

[0060] In the above preparation method, the coating method is independently selected from one of a doctor blade coating, a spin coating, a spray coating, a screen coating, a comma coating, a slot coating, a gravure coating, a light roll coating, a curtain coating, a reverse roll coating, a knife roll coating, a metering bar coating, a slot die coating, an immersion coating, and an air knife coating.

[0061] In addition, the preparation method of the steady-state low-transmittance light modulation glass in the utility model, include: after the each layer of steady-state low-transmittance light modulation glass is placed in sequence laminated, carry out the gluing treatment, obtain light modulation glass.

[0062] Wherein, the temperature of the gluing treatment is 90~130 DEG C, and the pressure is 0.1~1.5 MPa.

[0063] The kind of the first transparent glass and the second transparent glass is not specially limited, and the transparent glass for conventional light-adjusting glass known to those skilled in the art can be used, which can be ordinary glass such as inorganic glass and organic glass, or functional glass such as UV blocking glass, IR blocking glass, Low-E glass, tempered glass or antibacterial glass, and can also be selected from colored glass such as gray glass and tea-colored glass.

[0064] The kind of the first interlayer and the second interlayer is not specially limited, and the interlayer for conventional light-adjusting glass known to those skilled in the art can be used, which can be EVA adhesive film, TPU adhesive film and PVB adhesive film, or functional adhesive film such as UV blocking EVA adhesive film, UV blocking TPU adhesive film and UV blocking PVB adhesive film, or colored adhesive film such as gray EVA adhesive film, gray TPU adhesive film and gray PVB adhesive film.

[0065] The manufacturing mode of the light-adjusting glass is not specially limited, and the conventional interlayer mode of light-adjusting glass can be used, such as interlayer in a laminator or interlayer in a high-pressure kettle or interlayer box / furnace.

[0066] Finally, the light-adjusting glass prepared by the utility model can be applied to automobile window glass, sky screen glass or glass curtain wall.

[0067] Generally, the production process of the light-adjusting film is coating film first and then curing, and when the steady state of the light-adjusting film is dark state and the light transmittance is very low, for the UV curing type light-adjusting film, the UV light transmittance is poor due to the low light transmittance, so that the active layer UV curing is incomplete, which affects the product quality of the light-adjusting film.

[0068] The utility model discloses a kind of light-adjusting films, which are prepared by laminating a transparent conductive layer and an active layer precursor with high UV curing light transmittance, and then bonding two active layers by adhesive after curing the laminated material of the transparent conductive layer and the active layer, to solve the problem of low UV curing difficulty due to low light transmittance.

[0069] The utility model calculates the curing rate of the light-adjusting film according to FT-IR test results:

[0070] FT-IR data of the active layer precursor (before curing) and the active layer (after curing) are tested respectively,

[0071] Curing rate%= (1-(M1 / R1) / (M0 / R0))*100

[0072] M1 / R1 is the ratio of the peak area of 1406cm -1 to the peak area of 1740cm -1 in the FT-IR spectrum of the active layer (after curing).

[0073] M0 / R0 is the 1406 cm⁻¹ in the FT-IR spectrum of the active layer precursor (before curing). -1 The peak area is 1740 cm⁻¹ -1 The ratio of peak area.

[0074] A higher percentage of curing rate indicates a better curing effect.

[0075]

Example 1

[0076] The preparation steps of the steady-state low transmittance dimming film are as follows:

[0077] Step a: Prepare the suspended particle active layer precursor according to the method in Example 5 of CN112882258A.

[0078] Step b: Using a doctor blade type automatic coating machine (MSK-AFA-III type, MTI Corporation), the suspended particle active layer precursor prepared in step a is coated onto the ITO side of the ITO / PET transparent conductive film, and the coating thickness of the suspended particle active layer precursor is controlled to be 50 μm.

[0079] Step c: Curing the wet film prepared in step b under a nitrogen atmosphere using a UV curing machine (Aventk X200-150) for 1 minute with a UV lamp power of 700 W / m. 2 ,

[0080] Step d: On the active layer side prepared in step c, apply the adhesive layer precursor thermosetting epoxy adhesive according to the method in step b, controlling the coating thickness of the adhesive layer precursor to be 1 μm.

[0081] Step e: The precursor side of the adhesive layer prepared in step d is stacked face-to-face with another active layer side prepared in step c.

[0082] Step f: Heat cure the laminate from step e at 90°C for 1 hour to obtain the product shown below. Figure 1 The test results for the dimming film shown are shown in Table 1.

[0083]

Example 2

[0084] Same as [Example 1], except for step b, the coating thickness of the suspended particle active layer precursor is controlled to be 40 μm, and the test results are shown in Table 1.

[0085]

Example 3

[0086] The suspended particle dimming film prepared in [Example 2] using two ultra-white glass layers and two EVA interlayers is processed according to... Figure 2The structures are placed in sequence in a high-pressure kettle for lamination, the lamination temperature is 110 DEG C, the relative pressure of lamination is 0.6 MPa, and the lamination time is 60 minutes, to obtain the dimming glass, and the test results are shown in Table 1.

[0087] Comparative Example 1

[0088] The preparation steps of the dimming film are as follows:

[0089] Step a, the suspended particle active layer precursor is prepared according to the method of Example 5 in CN112882258A,

[0090] Step b, using a scraper type automatic film coating machine (MSK-AFA-III type, MTI Corporation), the suspended particle active layer precursor prepared in step a is coated on the ITO side of the ITO / PET transparent conductive film, and the coating thickness of the suspended particle active layer precursor is controlled to be 20 μm,

[0091] Step c, another piece of ITO / PET transparent conductive film is overlaid on the wet film of step b, and the ITO side is in contact with the wet film,

[0092] Step d, the wet film prepared in step c is cured by a UV curing machine (X200-150 produced by Aventk Company) under a nitrogen atmosphere, UV curing for 1 min, and the UV lamp power is 700 W / m 2 , and the test results are shown in Table 1.

[0093] Comparative Example 2

[0094] The same as Comparative Example 1, except that the coating thickness of the suspended particle active layer precursor in step b is controlled to be 100 μm, and the test results are shown in Table 1.

[0095] Table 1

[0096] Example Total coating thickness μm Dark state light transmittance Bright state light transmittance Curing rate Example 1 100 0.03% 39.0% 98.1% Example 2 80 0.15% 40.1% 99.2% Example 3 Not applicable 0.10% 38.7% Not applicable Comparative Example 1 20 20.80% 71.8% 99.8% Comparative Example 2 100 0.06% 39.6% 56.7%

[0097] # Power supply: voltage effective value 110V, 60Hz

[0098] As can be seen from the results in Table 1, the preparation method of the utility model can obtain a UV curing type dimming film with very low steady-state dark-state light transmittance. Since the active layer is divided into two layers, the single-layer coating thickness is thin, and the influence on the penetration of UV light is small, the expected curing effect can be achieved. Comparative Example 2 is compared with Example 1, and it can be seen that the one-time coating and one-time curing of Comparative Example 2 leads to very poor curing rate, which seriously affects the use of the dimming film.

[0099] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Any simple modification, equivalent change or modification made according to the technical principle of the present application to the above embodiments still falls within the scope of the present application.

Claims

1. A steady state low light transmittance switchable film characterized by: The light-adjustable film comprises a first transparent substrate (1), a first transparent conductive layer (2), a first active layer (3), an adhesive layer (4), a second active layer (5), a second transparent conductive layer (6), and a second transparent substrate (7) arranged in a stack, and the steady-state light transmittance of the light-adjustable film is less than or equal to 0.5%.

2. The steady state low light transmittance switchable film according to claim 1, wherein: The steady-state light transmittance is less than or equal to 0.3%.

3. The steady state low light transmittance switchable film according to claim 1, wherein: The bright-state light transmittance of the light-adjustable film is greater than or equal to 5%.

4. The steady state low light transmittance switchable film according to claim 1, wherein: The bright-state light transmittance of the light-adjustable film is greater than or equal to 15%.

5. The steady state low light transmittance switchable film according to claim 1, wherein: The bright-state light transmittance of the light-adjustable film is greater than or equal to 20%.

6. The steady state low light transmittance switchable film according to claim 1, wherein: The thickness of the adhesive layer (4) is in the range of 0.5-20 μm.

7. The steady state low light transmittance switchable film according to claim 1, wherein: The thickness of the adhesive layer (4) is in the range of 1-10 μm.

8. The steady state low light transmittance switchable film according to claim 1, wherein: The first active layer (3) and the second active layer (5) are each independently selected from one of a suspended particle active layer, a polymer dispersed liquid crystal active layer, and an electrochromic active layer.

9. The steady state low light transmittance switchable film according to claim 1, wherein: The first active layer (3) and the second active layer (5) are each independently selected from a suspended particle active layer.

10. The steady state low light transmittance switchable film according to claim 1, wherein: The first transparent conductive layer (2) and the second transparent conductive layer (6) are each independently selected from one of an ITO conductive layer, an FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano-Ag wire conductive layer, conductive graphene, a conductive polymer, and a nano-Cu wire conductive layer.

11. The steady state low light transmittance switchable film according to claim 1, wherein: The first transparent substrate (1) and the second transparent substrate (7) are transparent plastic sheets.

12. A steady state low light transmittance switchable glass, characterized by: The light-adjustable film comprises: a first transparent glass (8), a second transparent glass (9), and a steady-state low light transmittance light-adjustable film as claimed in any one of claims 1-10 arranged between the first transparent glass (8) and the second transparent glass (9).

13. The steady state low light transmittance switchable glass according to claim 12, wherein: A first interlayer adhesive layer (10) is arranged between the first transparent glass (8) and the light-adjustable film, and / or a second interlayer adhesive layer (11) is arranged between the second transparent glass (9) and the light-adjustable film.

14. The steady state low light transmittance switchable glass according to claim 13, wherein: The material of the first interlayer adhesive layer (10) and the second interlayer adhesive layer (11) is selected from one of an EVA adhesive film, a TPU adhesive film, and a PVB adhesive film.

15. The steady state low light transmittance switchable glass according to claim 12, wherein: The first transparent glass (8) and the second transparent glass (9) are selected from one of an inorganic glass and an organic glass.

Images