Anti-glare and anti-reflection optical film

Abstract

The utility model discloses an anti-dazzle and anti-reflection optical film which comprises a base material layer, an anti-dazzle coating, a high-refractive-index coating and a low-refractive-index coating which are sequentially stacked. The elongation at break of the anti-dazzle coating is smaller than 5%, the water drop angle is smaller than 80 degrees, the dyne value is larger than 34, the wear resistance of steel wool is larger than or equal to 1000 times, the haze is 5%-8%, the indentation modulus is larger than 7 GPa, the refractive index of the high-refractive-index coating is 1.64-1.75, the water drop angle is smaller than 80 degrees, and the dyne value is larger than 34. The refractive index of the low-refractive-index coating is 1.35-1.45, and the surface water drop angle is larger than or equal to 110 degrees. The anti-dazzle and anti-reflection optical film provided by the utility model has better anti-reflection performance and excellent anti-dazzle performance, can resist wear for more than 2000 times, greatly prolongs the service life of a mobile phone protective film, can better meet the requirement of folding a mobile phone screen protective film, and has a very good application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of optical film, especially relates to a kind of anti-glare anti-reflection optical film. BACKGROUND

[0002] With the development demand of folding mobile phone, higher demand is put forward to the anti-glare, anti-reflection performance of screen protection film.Anti-reflection film forms some interfaces, so that the light waves reflected by each interface destructively interfere with each other, increase the glass transmittance, reduce the reflectivity, thereby reducing image distortion, so that users enjoy clearer image quality, to achieve the phenomenon of reducing glare.The reflectivity of ordinary optical protection film (general anti-glare coating optical film) is about 5%, which will affect the viewing comfort of screen, and it is difficult to meet the application requirements.In addition, during use, mobile phone screen is prone to scratching, collision, etc.The wear resistance level of the steel wool of the prior art can only reach 1000 times, the wear resistance level of the steel wool of the present application can be improved to more than 2000 times, the service life of the screen protection film is prolonged, and the use satisfaction of customers is improved. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide an anti-glare anti-reflection optical film in view of the above-mentioned deficiencies in the prior art.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of an anti-glare anti-reflection optical film, which comprises a substrate layer, an anti-glare coating, a high refractive index coating and a low refractive index coating arranged in sequence.

[0005] Preferably, the refractive index of the high refractive index coating is 1.64-1.75.

[0006] Preferably, the water drop angle of the high refractive index coating is less than 80°, and the daoyin value is greater than 34.

[0007] Preferably, the refractive index of the low refractive index coating is 1.35-1.45.

[0008] Preferably, the surface water drop angle of the low refractive index coating is greater than or equal to 110°.

[0009] Preferably, the elongation at break of the anti-glare coating is less than 5%, the water drop angle is less than 80°, the daoyin value is greater than 34, the steel wool wear resistance is greater than or equal to 1000 times, the haze is 5%-8% (not including the end value), and the indentation modulus is greater than 7GPa.

[0010] Preferably, the thickness of the anti-glare coating is 4-6μm.

[0011] Preferably, the thickness of the high refractive index coating is 100-120nm.

[0012] Preferably, the thickness of the low refractive index coating is 100-120 nm.

[0013] Preferably, the substrate layer is a PET optical film with a thickness of 50-100 μm, a water droplet angle of <80°, and a dyne value of >34.

[0014] The beneficial effects of this utility model are:

[0015] The anti-glare and anti-reflective optical film provided by this utility model includes a substrate layer, an anti-glare coating, a high refractive index coating, and a low refractive index coating stacked in sequence. The existing technology can only achieve a wear resistance level of 1,000 times, while this solution can improve the surface wear resistance level to more than 2,000 times, extend the service life of the screen protector, improve customer satisfaction, and has a very good application prospect.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the anti-glare and anti-reflection optical film of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1—Substrate layer; 2—Anti-glare coating; 3—High refractive index coating; 4—Low refractive index coating. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement it based on the description.

[0021] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0022] like Figure 1 As shown, this utility model provides an anti-glare and anti-reflection optical film, comprising a substrate layer 1, an anti-glare coating 2, a high refractive index coating 3, and a low refractive index coating 4, which are stacked sequentially.

[0023] In a preferred embodiment, the substrate layer 1 is a common optical substrate film, specifically a PET optical film with a thickness of 50-100μm.

[0024] In the preferred embodiment, the anti-glare coating 2 has an elongation at break < 5%, a water drop angle < 80°, a dyne value > 34, a steel wool abrasion resistance ≥ 1000 times, a haze 5%-8% (not including the end value), an indentation modulus > 7 GPa, and a thickness of the anti-glare coating 2 is 4-6 μm. The anti-glare effect can be provided by limiting the haze of the anti-glare coating 2; the elongation at break < 5% can ensure that the screen is bent and combined with the limitation of the indentation modulus (the indentation modulus > 7 GPa means that the elastic modulus is greater than 7 GPa at the indentation depth of 100 nm), the steel wool abrasion resistance of the final product can reach more than 2000 times; the water drop angle < 80° and the dyne value > 34 can ensure the bonding force between the coatings and good abrasion resistance stability.

[0025] In the preferred embodiment, the high refractive index coating 3 has a refractive index of 1.64-1.75, a water drop angle < 80°, a dyne value > 34, and a thickness of 100-120 nm. The high refractive index coating 3 provides high refractive index performance, as an intermediate coating, still needs to be a repeatable coating, so the water drop angle needs to be < 80°, the dyne value > 34, which can meet the requirements of the intermediate layer.

[0026] In the preferred embodiment, the low refractive index coating 4 has a refractive index of 1.35-1.45, a surface water drop angle ≥ 110°, and a thickness of 100-120 nm. The performance requirements of the low refractive index coating 4 are anti-glare, high water drop angle, low reflectivity, high abrasion resistance, and the coating is directly contacted with the user, which needs good smooth feeling, and the above parameters can better meet the requirements.

[0027] In the preferred embodiment, the anti-glare coating 2, the high refractive index coating 3 and the low refractive index coating 4 can be coated by polyurethane acrylate, epoxy acrylate, polyester acrylate glue, and the appropriate conventional glue product is selected according to the above parameter requirements of each coating, and the conventional coating process can be obtained, but it needs to be understood that the focus of the utility model is to provide an anti-glare anti-reflection optical film with the above structure and the above parameter characteristics, and the specific material used for the anti-glare anti-reflection optical film is not improved, and the specific preparation process is not limited. For example, the raw glue of each coating can be conventionally selected according to the following requirements:

[0028] The raw glue of the anti-glare coating 2 has a refractive index of 1.5-1.55, a solid content of 20%-40%, and a viscosity ≤ 100 cps (25 °C); the raw glue of the high refractive index coating 3 has a refractive index of 1.64-1.75, a solid content of 1%-5%, and a viscosity ≤ 50 cps (25 °C); and the raw glue of the low refractive index coating 4 has a refractive index of 1.35-1.45, a solid content of 1%-5%, and a viscosity ≤ 50 cps (25 °C).

[0029] The above is the overall concept of the present application, and the following provides detailed examples to further illustrate the present application. It should be noted that the specific preparation process of the anti-glare anti-reflective optical film is provided in the following examples, but this process is only a conventional choice to obtain the optical film with this structure, and does not improve the process itself.

[0030] Example One

[0031] On a 50μm PET optical film (Japan Toyo Rosh), a re-coatable anti-glare glue with a refractive index of 1.5 from Tai'er Chemical Co., Ltd. with a model number of Z-754R was coated, and was heat-cured by an oven and UV light-cured to form an anti-glare coating layer (anti-glare coating layer 2) with a thickness of 4μm; on this coating layer, HR glue with a refractive index of 1.67 from Japan Catalyst with a model number of HR-301 and DPHA and IGM 184 initiator from Sartomer were coated again, and were heat-cured by an oven and UV light-cured to form an HR coating layer (high refractive index coating layer 3) with a thickness of 110nm; finally, LR glue with a refractive index of 1.40 from Goryong Chemical Co., Ltd. with a model number of LINC-273R was coated, and was heat-cured by an oven and UV light-cured to form an LR coating layer (low refractive index coating layer 4) with a thickness of 110nm, to obtain an anti-glare anti-reflective optical film.

[0032] Example Two

[0033] On a 50μm PET optical film (Japan Toyo Rosh), a re-coatable anti-glare glue with a refractive index of 1.5 from Guangzhou Shenwei New Material Co., Ltd. with a model number of SWAG3C-0521 was coated, and was heat-cured by an oven and UV light-cured to form an anti-glare coating layer (anti-glare coating layer 2) with a thickness of 4μm; on this coating layer, HR glue with a refractive index of 1.67 from Japan Catalyst with a model number of HR-301 and DPHA and IGM 184 initiator from Sartomer were coated again, and were heat-cured by an oven and UV light-cured to form an HR coating layer (high refractive index coating layer 3) with a thickness of 110nm; finally, LR glue with a refractive index of 1.40 from Goryong Chemical Co., Ltd. with a model number of LINC-273R was coated, and was heat-cured by an oven and UV light-cured to form an LR coating layer (low refractive index coating layer 4) with a thickness of 110nm, to obtain an anti-glare anti-reflective optical film.

[0034] Example Three

[0035] In 50 pm PET optical film (Japan Toyo Rosh), the anti-glare glue with the refractive index of 1.5 and the type of SWAG10-0003 from Guangzhou Shenwei New Material Co., Ltd. was coated, and the anti-glare coating (anti-glare coating 2) with the thickness of 4 pm was formed through oven heat curing and UV light curing; HR glue with the refractive index of 1.67 and the type of HR-301 from Japan Catalyst and DPHA and IGM 184 initiator from Sartomer were coated on the coating, and the HR coating (high refractive index coating 3) with the thickness of 110 nm was formed through oven heat curing and UV light curing; finally, LR glue with the refractive index of 1.40 and the type of LINC-273R from Kyoeisha Chemical Co., Ltd. was coated, and the LR coating (low refractive index coating 4) with the thickness of 110 nm was formed through oven heat curing and UV light curing, to obtain an anti-glare anti-reflective optical film.

[0036] Comparative Example 1

[0037] In 50 pm PET optical film (Japan Toyo Rosh), the anti-glare glue with the refractive index of 1.5 and the type of SWAG10-0003 from Guangzhou Shenwei New Material Co., Ltd. was coated, and the anti-glare coating (anti-glare coating 2) with the thickness of 4 pm was formed through oven heat curing and UV light curing; HR glue with the refractive index of 1.67 and the type of HR-301 from Japan Catalyst and DPHA and IGM 184 initiator from Sartomer were coated on the coating, and the HR coating (high refractive index coating 3) with the thickness of 110 nm was formed through oven heat curing and UV light curing; finally, LR glue with the refractive index of 1.40 and the type of LINC-273R from Kyoeisha Chemical Co., Ltd. was coated, and the LR coating (low refractive index coating 4) with the thickness of 110 nm was formed through oven heat curing and UV light curing, to obtain an anti-glare anti-reflective optical film.

[0038] Comparative Example 2

[0039] In 50 pm PET optical film (Japan Toyo Rosh), the anti-glare glue with the refractive index of 1.5 and the type of SWAG10-0003 from Guangzhou Shenwei New Material Co., Ltd. was coated, and the anti-glare coating (anti-glare coating 2) with the thickness of 4 pm was formed through oven heat curing and UV light curing; HR glue with the refractive index of 1.67 and the type of HR-301 from Japan Catalyst and DPHA and IGM 184 initiator from Sartomer were coated on the coating, and the HR coating (high refractive index coating 3) with the thickness of 110 nm was formed through oven heat curing and UV light curing; finally, LR glue with the refractive index of 1.40 and the type of LINC-273R from Kyoeisha Chemical Co., Ltd. was coated, and the LR coating (low refractive index coating 4) with the thickness of 110 nm was formed through oven heat curing and UV light curing, to obtain an anti-glare anti-reflective optical film.

[0040] The optical films prepared in the examples and comparative examples were subjected to the following performance tests:

[0041] Reflectivity, test method or standard: tested using optical spectrophotometer CM-3600A;

[0042] Haze tester, test method or standard: tested using optical spectrophotometer CM-3600A;

[0043] Steel wool resistance, test method or standard: using a special steel wool (steel wool model: Bonstar #0000), applying a load of 1 kg, a 2*2 cm platen, at a speed of 40-60 times per minute, with a stroke of about 40 mm, rubbing back and forth on the sample surface for 1000 cycles.

[0044] Elongation at break, test method or standard: prepare a sample bar, sample size 10 mm*100 mm, set the gauge length of the tensile machine to 50 mm, pre-set the strain value, after tensile test, observe whether the coating has cracks, record the data.

[0045] Indentation modulus test method: tested using nanoindenter Hysitron TI 980, indentation depth set to 100 nm.

[0046] Bending resistance test: tested using multifunctional profiling bending machine WS4-M-MFS01 at room temperature, bending radius 3 mm.

[0047] The test results of the anti-glare coating examples and comparative examples are shown in Table 1 below

[0048] Table 1

[0049]

[0050] The test results of the finished product examples and comparative examples are shown in Table 2

[0051] Table 2

[0052]

[0053] From the test results, examples one to three can all obtain qualified products, and can achieve the effect of low reflectivity and steel wool resistance.

[0054] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0055] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form; any person skilled in the art can implement the utility model according to the drawings and the above; however, any equivalent changes, modifications and evolutions made by those skilled in the art within the scope of the technical scheme of the utility model, using the technical content disclosed above, are equivalent embodiments of the utility model; meanwhile, any equivalent changes, modifications and evolutions made to the above embodiments according to the essence of the utility model are still within the protection scope of the technical scheme of the utility model.

Claims

1. An anti-glare anti-reflective optical film, characterized by, The anti-glare coating layer, the high-refractive coating layer and the low-refractive coating layer are sequentially stacked on the substrate layer; the high-refractive coating layer has a thickness of 100-120 nm, a water drop angle of <80° and a da Vinci value of >34; the low-refractive coating layer has a thickness of 100-120 nm; the anti-glare coating layer has a thickness of 4-6 μm, an elongation at break of <5%, a water drop angle of <80°, a da Vinci value of >34, a steel wool abrasion resistance of ≥1000 times, a haze of 5%-8% and an indentation modulus of >7 GPa; and the substrate layer has a water drop angle of <80° and a da Vinci value of >34.

2. The anti-glare, anti-reflective optical film according to claim 1, wherein The high-refractive coating layer has a refractive index of 1.64-1.

75.

3. The anti-glare, anti-reflective optical film according to claim 1, wherein The low-refractive coating layer has a refractive index of 1.35-1.

45.

4. The anti-glare, anti-reflective optical film according to claim 1, wherein The low-refractive coating layer has a water drop angle of ≥110°.

5. The anti-glare, anti-reflective optical film according to any one of claims 1 to 4, wherein The substrate layer is a PET optical film with a thickness of 50-100 μm.

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