Wear-resistant anti-fog polarizer and preparation method thereof

Abstract

The present invention discloses a wear-resistant anti-fog polarizer and a preparation method thereof, wherein the preparation method comprises providing a polarizer; washing the polarizer in an alkaline solution, then washing and drying the polarizer to obtain an alkaline-washed polarizer; dipping the alkaline-washed polarizer in a hardening liquid, then pulling and heat-curing the polarizer to obtain a hardened polarizer; washing the hardened polarizer with a plasma device to obtain an activated polarizer; applying a super-hydrophilic anti-fog liquid on the activated polarizer, then curing the polarizer to obtain a wear-resistant anti-fog polarizer. This application prepares a hardening layer on the polarizer and applies a super-hydrophilic anti-fog liquid on the hardening layer. The anti-fog layer is chemically bonded to the substrate, so that the polarizer has good wear resistance and long-lasting anti-fog performance.

Description

Technical Field

[0001] The present invention relates to the technical field of polarizers, and in particular to a wear-resistant anti-fog polarizer and a preparation method thereof. Background Art

[0002] Polarized lenses are optical lenses with polarizing properties, typically made from a multilayer polymer composite of polyvinyl alcohol (PVA) and triacetyl cellulose (TAC) films. They are widely used in electronics, sports, healthcare, automotive, photography, optical instruments, security, and other fields. Polarizers are not only the primary raw material for liquid crystal displays (LCDs), but are also used in polarized swimming goggles, sunglasses, 3D glasses, anti-glare goggles, filters for photographic equipment, anti-glare treatment for car headlights, polarizing microscopes, and specialized medical eyewear. Polarized lenses are globally recognized as the most suitable lenses for driving, effectively eliminating glare, improving vision and increasing safety. Traditional polarizers easily fog in cold temperatures (especially in winter), affecting performance and even rendering them unusable. Currently, there are two methods for preventing polarizers from fogging: spraying a disposable anti-fog agent and applying an anti-fog film.

[0003] However, the anti-fog agent sprayed on the existing polarizer has insufficient adhesion. When the surface of the polarizer is touched, rubbed, or cleaned, the anti-fog agent easily falls off. When the anti-fog film is affixed to the polarizer, there is also a risk of it falling off due to contact or friction. In other words, the anti-fog function is added to the existing polarizer by physically attaching a coating or film layer, which has poor wear resistance and is easy to fall off, and cannot maintain the anti-fog effect for a long time.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a wear-resistant anti-fog polarizer and a preparation method thereof, aiming to solve the problem that the existing polarizers have insufficient wear resistance and cannot maintain the anti-fog effect for a long time.

[0006] The technical solutions of the present invention are as follows:

[0007] A method for preparing a wear-resistant anti-fog polarizer, comprising:

[0008] providing a polarizer;

[0009] Washing the polarizer in an alkaline solution, and then washing and drying to obtain an alkaline-washed polarizer;

[0010] Dipping the alkali-washed polarizer into a hardening solution, and then pulling and thermally curing the polarizer to obtain a hardened polarizer;

[0011] Cleaning the hardened polarizer with a plasma device to obtain an activated polarizer;

[0012] The activated polarizer is coated with a super-hydrophilic anti-fog liquid, which is then cured to obtain a wear-resistant anti-fog polarizer.

[0013] The method for preparing the wear-resistant anti-fog polarizer, wherein the steps of washing the polarizer in an alkaline solution, and then washing and drying to obtain an alkaline-washed polarizer specifically include:

[0014] The polarizer is placed in an alkaline solution with a mass fraction of 1% to 30% at a temperature of 20-80° C., ultrasonically cleaned for 1-15 minutes, then rinsed with pure water, and then placed in an oven for drying at a temperature of 40-80° C. for 5-20 minutes to obtain an alkali-washed polarizer.

[0015] In the method for preparing the wear-resistant anti-fog polarizer, the alkaline solution includes at least one of a sodium hydroxide solution and a potassium hydroxide solution.

[0016] The method for preparing the wear-resistant anti-fog polarizer, wherein the steps of placing the alkali-washed polarizer into a hardening solution for dipping, and then pulling and heat-curing to obtain a hardened polarizer specifically include:

[0017] The alkali-washed polarizer is dipped into the hardening solution for 10-60 seconds, then pulled at a speed of 0.5-8 mm / s, and then placed in an oven for heat curing at a temperature of 40-80° C. for 3-24 hours to obtain a hardened polarizer.

[0018] The method for preparing the wear-resistant anti-fog polarizer, wherein the method for preparing the hardening liquid comprises:

[0019] 1-10 parts by weight of ethyl orthosilicate, 5-15 parts of silane coupling agent, 0.1-1 parts of guanidine hydrochloride auxiliary agent, and 100-200 parts of isopropyl alcohol solvent are added at 30-80°C, and hydrogen chloride is used as a catalyst to adjust the pH value of the system to 2-5. The mixture is stirred for 3-8 hours, and then allowed to stand and age at room temperature for 10-24 hours to obtain a hardening solution.

[0020] The method for preparing the wear-resistant anti-fog polarizer, wherein the silane coupling agent includes one or more of aminopropyltriethoxysilane, glycidoxypropyltrimethoxysilane, methacryloxypropyltrimethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, vinyltriethoxysilane and isocyanate silane.

[0021] The method for preparing the wear-resistant anti-fog polarizer, wherein the step of cleaning the hardened polarizer with a plasma device to obtain an activated polarizer specifically comprises:

[0022] A radio frequency power plasma device with a processing power of 300-800W and a background vacuum of 10-35Pa is used. A mixed gas of oxygen and nitrogen with a flow rate of 200-350sccm and a volume ratio of 1:1.5 to 1:5 is introduced into the plasma device for 200-500s to obtain an activated polarizer.

[0023] The method for preparing the wear-resistant anti-fog polarizer, wherein the coating method of the super-hydrophilic anti-fog liquid includes at least one of spraying, dipping, and shower coating;

[0024] The curing temperature is 40-80° C., and the curing time is 3-24 hours.

[0025] The method for preparing the wear-resistant anti-fog polarizer, wherein the method for preparing the super-hydrophilic anti-fog liquid comprises:

[0026] 1-10 parts by weight of polyvinyl alcohol with a degree of alcoholysis of 87%-89% are added to 100 parts of hot water at 40-90°C for dissolution; then 5-15 parts of γ-mercaptopropyltrimethoxysilane, 5-10 parts of aminopropyltriethoxysilane and 3-10 parts of ethyl orthosilicate are added, and the mixture is stirred at 45-90°C for 1-24 hours; then 5-15 parts of 20% hydrogen peroxide and 1-5 parts of sodium dodecylsulfonate are added, the mixture is stirred evenly, and aged for 1-24 hours to obtain a super hydrophilic anti-fog liquid.

[0027] The present application also discloses a wear-resistant anti-fog polarizer, which is prepared using any of the above methods for preparing a wear-resistant anti-fog polarizer; the wear-resistant anti-fog polarizer includes a polarizing layer, and a hardening layer and a super-hydrophilic anti-fog layer sequentially arranged on the polarizing layer.

[0028] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0029] The method for preparing a wear-resistant anti-fog polarizer disclosed in the present invention comprises the following steps: alkali-washing the polarizer to achieve alkaline saponification treatment, so that the surface ester of the triacetyl cellulose layer of the polarizer is decomposed to generate hydroxyl groups, thereby improving adhesion, so as to form a firmly connected hardened layer on the polarizer and improve the hardness of the polarizer. Furthermore, the hardened layer is chemically bonded with a super-hydrophilic anti-fog liquid after plasma activation, so that the structure of the prepared wear-resistant anti-fog polarizer is stable, which is different from the physical adsorption mode of conventional anti-fog liquid on the market, thereby increasing the wear resistance of the polarizer and facilitating the extension of the effective service life of the polarizer. In addition, the plasma activation also has an etching effect on the hardened layer, thereby increasing the surface roughness and further enhancing the hydrophilicity of the polarizer surface, thereby facilitating the preparation of a wear-resistant, super-hydrophilic anti-fog polarizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 Flowchart of the method for preparing the wear-resistant anti-fog polarizer of the present invention;

[0032] Figure 2 Schematic diagram of the structure of the wear-resistant anti-fog polarizer of the present invention;

[0033] Figure 3 Graph showing the test results of the contact angle of the wear-resistant anti-fog polarizer of the present invention to water;

[0034] Figure 4 This is an anti-fog test effect diagram of the wear-resistant anti-fog polarizer of the present invention;

[0035] Figure 5 This is an anti-fog effect diagram of the wear-resistant anti-fog polarizer in the present invention after 3000 wet friction tests.

[0036] Among them, 10, polarizing layer; 20, hardening layer; 30, super hydrophilic anti-fog layer. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] See Figure 1 In one embodiment of the present invention, a method for preparing a wear-resistant anti-fog polarizer is disclosed, which comprises:

[0039] S100, providing a polarizer;

[0040] S200, washing the polarizer in an alkaline solution, and then washing and drying to obtain an alkaline-washed polarizer;

[0041] S300, placing the alkali-washed polarizer into a hardening solution for dipping, and then performing pulling and heat curing to obtain a hardened polarizer;

[0042] S400, cleaning the hardened polarizer with a plasma device to obtain an activated polarizer;

[0043] S500 , coating the activated polarizer with a super-hydrophilic anti-fog liquid, and then curing the liquid to obtain a wear-resistant anti-fog polarizer.

[0044] The method for preparing a wear-resistant anti-fog polarizer disclosed in this embodiment involves alkaline saponification treatment of the polarizer by alkali washing. This decomposes the surface ester of the triacetyl cellulose layer of the polarizer to produce hydroxyl groups, thereby improving adhesion and forming a firmly connected hardened layer on the polarizer, thereby increasing the hardness of the polarizer. Furthermore, the hardened layer is chemically bonded with the super-hydrophilic anti-fog liquid after plasma activation, thereby making the structure of the wear-resistant anti-fog polarizer stable. The chemical connection between the anti-fog layer and the hardened layer is different from physical adsorption, which increases the wear resistance of the polarizer and helps extend the effective service life of the polarizer.

[0045] Specifically, in this embodiment, plasma activation also produces an etching effect on the hardened layer, thereby increasing the surface roughness and further enhancing the hydrophilicity of the polarizer surface, which is conducive to producing a wear-resistant, super-hydrophilic anti-fog polarizer and extending the service life of the anti-fog polarizer.

[0046] Specifically, as an implementation of this embodiment, step S200 is disclosed to include:

[0047] The polarizer is placed in an alkaline solution with a mass fraction of 1% to 30% at a temperature of 20-80° C., ultrasonically cleaned for 1-15 minutes, then rinsed with pure water, and then placed in an oven for drying at a temperature of 40-80° C. for 5-20 minutes to obtain an alkali-washed polarizer.

[0048] In the actual manufacturing process, due to the poor heat resistance of the polarizer, it is easy to deform and discolor when exposed to high temperature, which affects its use. Therefore, in this embodiment, the temperature of alkaline washing and drying is set not to exceed 80°C to maintain the original shape and normal optical properties of the polarizer; the TAC layer of the polarizer is treated with an alkaline solution, and the surface ester of the polarizer is decomposed through a saponification reaction to produce a large number of hydroxyl groups, which facilitates subsequent chemical bonding with the hardened layer and increases the adhesion of the hardened layer; then ultrasonic cleaning and pure water rinsing are used to reduce the residual alkaline solution on the surface to avoid affecting subsequent preparation and processing.

[0049] In addition, the drying temperature and drying time disclosed in this embodiment are adjusted in coordination. If the drying temperature is low, the drying time can be extended, and if the drying temperature is high, the drying time can be shortened. For example, a drying temperature of 40°C and a drying time of 20 minutes can achieve similar drying effects as a drying time of 80°C and a drying time of 5 minutes, and both can meet the requirements of the technical solution disclosed in this application.

[0050] Specifically, as another implementation of this embodiment, it is disclosed that the alkaline solution includes at least one of a sodium hydroxide solution and a potassium hydroxide solution.

[0051] Specifically, as another implementation of this embodiment, step S300 is disclosed to specifically include:

[0052] The alkali-washed polarizer is dipped into the hardening solution for 10-60 seconds, then pulled at a speed of 0.5-8 mm / s, and then placed in an oven for heat curing at a temperature of 40-80° C. for 3-24 hours to obtain a hardened polarizer.

[0053] In this embodiment, the alkali-washed polarizer is dipped in a hardening liquid so that the hardening liquid combines with the hydroxyl groups on the surface of the polarizer to form a hardening layer to increase the hardness of the polarizer. In addition, the drying temperature does not exceed 80°C to reduce the chance of discoloration or bending of the polarizer. The drying temperature is set to be no less than 40°C to avoid prolonged drying time and increased time costs.

[0054] Specifically, as another implementation of this embodiment, a method for preparing the hardening liquid is disclosed, comprising:

[0055] 1-10 parts by weight of ethyl orthosilicate, 5-15 parts of silane coupling agent, 0.1-1 parts of guanidine hydrochloride auxiliary agent, and 100-200 parts of isopropyl alcohol solvent are added at 30-80°C, and hydrogen chloride is used as a catalyst to adjust the pH value of the system to 2-5. The mixture is stirred for 3-8 hours, and then allowed to stand and age at room temperature for 10-24 hours to obtain a hardening solution.

[0056] The hardening liquid disclosed in this embodiment includes organic and inorganic materials. During the preparation of the hardening layer, the organic part is combined with the surface of the TAC layer by a non-polar force, and the final hardening layer is an organic-inorganic hybrid material layer, so that the inorganic part of the hardening layer can be chemically combined with the super hydrophilic anti-fog liquid through plasma activation in subsequent processing; that is, the hardening layer processed in this embodiment can, first, form a protective layer, increase the hardness of the polarizer, and improve the scratch resistance of the polarizer; second, it can serve as a transition layer, one side of which is firmly combined with the surface of the polarizer, and the other side is firmly combined with the super hydrophilic film layer, so that the wear resistance of the polarizer is enhanced, and the anti-fog layer formed on the surface by the super hydrophilic anti-fog liquid is not easy to fall off. The preparation method disclosed in this embodiment can obviously obtain a wear-resistant anti-fog polarizer with a more stable structure, which is conducive to maintaining the long-term and effective use of the polarizer.

[0057] Specifically, in this embodiment, adding guanidine hydrochloride as an auxiliary agent to the hardening liquid can promote the low-temperature curing of the hardening liquid. That is, in order to perform processing below 80°C and reduce the risk of deformation or discoloration of the polarizer, the curing of the hardening liquid is promoted by adding guanidine hydrochloride as an auxiliary agent to form a hardened layer.

[0058] Specifically, as another implementation of this embodiment, it is disclosed that the silane coupling agent includes one or more of aminopropyltriethoxysilane, glycidoxypropyltrimethoxysilane, methacryloxypropyltrimethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, vinyltriethoxysilane and isocyanate silane.

[0059] Specifically, as another implementation of this embodiment, step S400 is disclosed to include:

[0060] A radio frequency power plasma device is used with a processing power of 300-800W and a background vacuum of 10-35Pa; a mixed gas of oxygen and nitrogen with a flow rate of 200-350sccm and a volume ratio of 1:1.5 to 1:5 is introduced into the plasma device for 200-500s to obtain an activated polarizer.

[0061] In this embodiment, plasma equipment is used to generate plasma gas for surface cleaning, which has significant advantages such as low cost, no waste, and no pollution. In addition, the treatment can be performed in a low-temperature environment without causing deformation of the polarizer.

[0062] Specifically, as another implementation of this embodiment, it is disclosed that the coating method of the super hydrophilic anti-fog liquid includes at least one of spraying, dipping, and shower coating;

[0063] The curing temperature is 40-80° C., and the curing time is 3-24 hours.

[0064] The super-hydrophilic anti-fog liquid disclosed in the present embodiment can be applied to the surface of the activated polaroid by spraying, dipping or pouring. The spraying or pouring method can increase the fluidity of the super-hydrophilic anti-fog liquid during the coating process, so as to quickly cover the entire contact surface, speed up the coating efficiency, and save the amount of super-hydrophilic anti-fog liquid. The dip coating method can ensure that the surface of the entire activated polaroid can be exposed to the super-hydrophilic anti-fog liquid, ensuring the coating quality to prevent the surface of the super-hydrophilic layer from being defective. In addition, the curing temperature is set to be lower than 80°C to reduce the risk of deformation or discoloration of the polaroid. By adjusting the temperature, the drying time can be adaptively adjusted to obtain a good drying effect and make a good quality wear-resistant anti-fog polaroid.

[0065] Specifically, as another implementation of this embodiment, a method for preparing the super-hydrophilic anti-fog liquid is disclosed, comprising:

[0066] 1-10 parts by weight of polyvinyl alcohol with a degree of alcoholysis of 87%-89% are added to 100 parts of hot water at 40-90°C for dissolution; then 5-15 parts of γ-mercaptopropyltrimethoxysilane, 5-10 parts of aminopropyltriethoxysilane and 3-10 parts of ethyl orthosilicate are added, and the mixture is stirred at 45-90°C for 1-24 hours; then 5-15 parts of 20% hydrogen peroxide and 1-5 parts of sodium dodecylsulfonate are added, the mixture is stirred evenly, and aged for 1-24 hours to obtain a super hydrophilic anti-fog liquid.

[0067] The super-hydrophilic anti-fog liquid disclosed in this embodiment contains hydrophilic groups such as sulfonic acid groups and hydroxyl groups. Water droplets will not gather on the surface of the prepared super-hydrophilic anti-fog film layer. Once the surface of the anti-fog polarizer comes into contact with water during use, the water will quickly spread on the surface of the anti-fog polarizer to form a water film. The transparent water film will not affect the optical properties of the polarizer. The super-hydrophilic anti-fog liquid can form a -Si-O-Si- chemical bond with the inorganic part of the hardened layer, thereby forming a super-hydrophilic anti-fog layer on the hardened layer, so that the polarizer has excellent wear resistance and blister resistance, and the polarizer has long-lasting anti-fog properties, forming a wear-resistant super-hydrophilic anti-fog polarizer, and reducing the risk of injury to the user caused by the shedding of the super-hydrophilic anti-fog layer.

[0068] like Figure 2 As shown, the present application also discloses a wear-resistant anti-fog polarizer, which is prepared using any of the preparation methods of the wear-resistant anti-fog polarizer described above; the wear-resistant anti-fog polarizer includes a polarizing layer 10, and a hardening layer 20 and a super hydrophilic anti-fog layer 30 sequentially arranged on the polarizing layer 10.

[0069] The wear-resistant anti-fog polarizer disclosed in this embodiment is provided with a hardened layer and a super-hydrophilic anti-fog layer. The anti-fog layer is chemically bonded to the substrate, and the structure is stable. Unlike physical adsorption, the wear resistance of the polarizer is increased, which is beneficial to extending the effective service life of the polarizer.

[0070] Specifically, in another embodiment of the present invention, a preparation process of a wear-resistant anti-fog polarizer is disclosed: the polarizer is placed in a sodium hydroxide aqueous solution with a temperature of 60°C and a mass fraction of 10%, ultrasonically cleaned for 8 minutes, rinsed with pure water, and dried in an oven at 60°C; then, the polarizer is immersed in a hardening liquid for 30 seconds, pulled at a speed of 4mm / s, and placed in an oven for thermal curing at a temperature of 60°C for 12 hours; then, the surface of the polarizer is cleaned with a plasma device to etch the surface to form a rough microstructure, which also plays an activation role; finally, the super-hydrophilic anti-fog agent is sprayed on the polarizer, and then placed in an oven for curing at a curing temperature of 60°C and a curing time of 12 hours to obtain a wear-resistant anti-fog polarizer. Performance testing of the wear-resistant anti-fog polarizer:

[0071] (1) Contact angle detection of water

[0072] The contact angle of water droplets on anti-fog polarized lenses is measured using the GB / T30447-2013 method. Figure 3 As shown in the test results, the contact angle between the wear-resistant anti-fog polarizer surface and water is less than 5°, which is a super hydrophilic surface.

[0073] (2) Anti-fog test

[0074] Use GB / T31726-2015 plastic film anti-fog test method, place the polarized lens above 85℃ saturated water vapor, if there is no fog for 30 seconds, the anti-fog is qualified. Figure 4 As shown, the left lens is the control group, and the right lens is the wear-resistant anti-fog polarizer. In the test results, the wear-resistant anti-fog polarizer did not fog during the test, and the anti-fog level was level 1.

[0075] (3) Friction resistance test

[0076] Wet the ultra-fine polyester fiber dust-free cloth with water, wring it out, fold it into four layers, and wrap it on the friction head; add a weight of 750G to the friction tool, with a total weight of 820g. The sample is subjected to a pressure of about 100,000Pa. Set the speed to 80 rpm. One round of friction is counted as one time. After 3,000 times of friction, perform the anti-fog test as described above. Figure 5 As shown, the area between the two marking lines on the lens is the friction area. In the test results, the wear-resistant anti-fog polarizer still does not fog, and the anti-fog level is still level 1.

[0077] (4) Water blister resistance test

[0078] The wear-resistant anti-fog polarizer was placed in water and soaked for 12 hours, then taken out and dried, and the anti-fog test as described above was performed. According to the test results, the wear-resistant anti-fog polarizer still did not fog, and the anti-fog level was level 2.

[0079] (5) Hardness test

[0080] The hardness of anti-fog polarized lenses was measured using the GB6739-1996 coating pencil test method. The test results showed that the hardness grade of the wear-resistant anti-fog polarized film was HB.

[0081] (6) Adhesion test

[0082] The adhesion of anti-fog polarized lenses was measured using the GB / T9286-1998 100-grid method. The test results showed that the adhesion level of the wear-resistant anti-fog polarized film was level 1.

[0083] In summary, the wear-resistant anti-fog polarizer disclosed in this embodiment has good hydrophilic properties, can achieve an anti-fog effect, and has good abrasion resistance and blister resistance, high hardness, and strong adhesion, which is conducive to extending the service life and achieving a long-lasting anti-fog function.

[0084] In summary, the present application discloses a method for preparing a wear-resistant anti-fog polarizer, which comprises:

[0085] S100, providing a polarizer;

[0086] S200, washing the polarizer in an alkaline solution, and then washing and drying to obtain an alkaline-washed polarizer;

[0087] S300, placing the alkali-washed polarizer into a hardening solution for dipping, and then performing pulling and heat curing to obtain a hardened polarizer;

[0088] S400, cleaning the hardened polarizer with a plasma device to obtain an activated polarizer;

[0089] S500 , coating the activated polarizer with a super-hydrophilic anti-fog liquid, and then curing the liquid to obtain a wear-resistant anti-fog polarizer.

[0090] The method for preparing a wear-resistant anti-fog polarizer disclosed in this embodiment involves alkaline saponification treatment of the polarizer by alkali washing. This decomposes the surface ester of the triacetyl cellulose layer of the polarizer to produce hydroxyl groups, thereby improving adhesion. This allows for a firmly attached hardened layer to be formed on the polarizer, thereby increasing the hardness of the polarizer. Furthermore, the hardened layer is chemically bonded with the super-hydrophilic anti-fog liquid after plasma activation, thereby achieving a stable structure for the resulting wear-resistant anti-fog polarizer. This, unlike physical adsorption, increases the wear resistance of the polarizer and helps extend the effective service life of the anti-fog polarizer.

[0091] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0092] It should be noted that the present invention uses a wear-resistant anti-fog polarizer as an example to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to wear-resistant anti-fog polarizers, and can also be applied to the production and use of other similar workpieces.

[0093] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a wear-resistant anti-fog polarizer, characterized in that: include: providing a polarizer; The polarizer is placed in an alkaline solution with a mass fraction of 1% to 30% at a temperature of 20-80° C., ultrasonically cleaned for 1-15 minutes, then rinsed with pure water, and then placed in an oven for drying at a temperature of 40-80° C. for 5-20 minutes to obtain an alkali-washed polarizer; the TAC layer of the polarizer is treated with an alkaline liquid to decompose the ester on the surface of the polarizer to produce hydroxyl groups through a saponification reaction, which are subsequently chemically bonded to the hardened layer; The alkali-washed polarizer is dipped into the hardening solution for 10-60 seconds, then pulled at a speed of 0.5-8 mm / s, and then placed in an oven for heat curing at a temperature of 40-80° C. for 3-24 hours to obtain a hardened polarizer having a hardened layer on its surface; The preparation method of the hardening liquid comprises: 1-10 parts by weight of tetraethyl orthosilicate, 5-15 parts of a silane coupling agent, 0.1-1 parts of a guanidine hydrochloride auxiliary agent, and 100-200 parts of an isopropyl alcohol solvent are added at 30-80° C., hydrogen chloride is used as a catalyst to adjust the pH value of the system to 2-5, and the mixture is stirred for 3-8 hours, and then allowed to stand and age at room temperature for 10-24 hours to obtain a hardening solution; the hardened polarizer is cleaned with a plasma device to obtain an activated polarizer, specifically using a radio frequency power plasma device with a processing power of 300-800 W and a background vacuum of 10-35 Pa, and a mixed gas of oxygen and nitrogen with a flow rate of 200-350 sccm and a volume ratio of 1:1.5 to 1:5 is introduced into the plasma device for 200-500 seconds to obtain an activated polarizer; A super-hydrophilic anti-fog liquid is applied to the activated polarizer, and then cured to obtain a wear-resistant anti-fog polarizer, wherein the surface of the polarizer has a super-hydrophilic film layer; a hardened layer is chemically bonded with the super-hydrophilic anti-fog liquid after plasma activation, and the hardened layer serves as a transition layer, with one side firmly bonded to the surface of the polarizer and the other side firmly bonded to the super-hydrophilic film layer; The coating method of the super hydrophilic anti-fog liquid includes at least one of spraying, dipping and shower coating, the curing temperature is 40-80° C., and the curing time is 3-24 hours; The preparation method of the super hydrophilic anti-fog liquid comprises: 1-10 parts by weight of polyvinyl alcohol with a degree of alcoholysis of 87%-89% are added to 100 parts of hot water at 40-90°C for dissolution; then 5-15 parts of γ-mercaptopropyltrimethoxysilane, 5-10 parts of aminopropyltriethoxysilane and 3-10 parts of ethyl orthosilicate are added, and the mixture is stirred at 45-90°C for 1-24 hours; then 5-15 parts of 20% hydrogen peroxide and 1-5 parts of sodium dodecylsulfonate are added, the mixture is stirred evenly, and aged for 1-24 hours to obtain a super hydrophilic anti-fog liquid.

2. The method for preparing a wear-resistant anti-fog polarizer according to claim 1, wherein: The alkaline solution includes at least one of a sodium hydroxide solution and a potassium hydroxide solution.

3. The method for preparing a wear-resistant anti-fog polarizer according to claim 1, wherein: The silane coupling agent includes one or more of aminopropyltriethoxysilane, glycidoxypropyltrimethoxysilane, methacryloxypropyltrimethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, vinyltriethoxysilane and isocyanate silane.

4. A wear-resistant anti-fog polarizer, characterized in that: The wear-resistant anti-fog polarizer is prepared by the preparation method of any one of claims 1 to 3; the wear-resistant anti-fog polarizer comprises a polarizing layer, and a hardening layer and a super-hydrophilic anti-fog layer sequentially arranged on the polarizing layer.

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