Anti-reflective optical film

Abstract

The invention discloses an anti-reflection optical film, wherein the anti-reflection optical film comprises: a base film and an anti-reflection coating applied to the surface of the base film; wherein the anti-reflection coating comprises the following components: 10-14 parts by weight of acrylate, 5-10 parts by weight of silicate, 7-14 parts by weight of UV curing resin, 4-12 parts by weight of reactive diluent, 1-5 parts by weight of photoinitiator, 0.2-0.6 parts by weight of surfactant, 0.1-0.4 parts by weight of polar organic solvent, 10-30 parts by weight of deionized water. The present invention is cured and polymerized by acrylate and UV curing resin, and silicate, surfactant and polar organic solvent are subjected to gelation reaction to generate porous silicon polymer, and porous silicon polymer is cross-linked with acrylic acid cured product, the texture of the prepared low refractive index layer is more uniform, and porous refractive particles are evenly distributed, so the prepared reflective film has excellent properties such as lower refractive index.

Description

Technical Field

[0001] The invention relates to the technical field of optical film preparation, in particular to an anti-reflection optical film. Background Art

[0002] In recent years, various new flat panel display (LCD, OLED, EL, PDP) technologies and products have developed rapidly. The flat panel display industry has become an important part of the information industry. The flat panel display industry and market are growing rapidly around the world. The strong light reflected from the outer surface of various flat panel displays or the strong light generated inside the display enters the human eye, which can easily cause glare and blur, and make it difficult to read the content on the display screen clearly. Watching the display screen or transparent panel in these harsh environments for a long time can easily cause visual fatigue and damage to the human eye. Therefore, anti-reflection film is applied to the display screen or transparent panel to reduce reflection.

[0003] The existing anti-reflection film usually includes a base film and a low refractive index layer coated on the base film, and reduces the intensity of reflected light through optical interference. The low refractive index layer is mostly made of low refractive index optical pressure-sensitive adhesive, which has problems such as uneven components after molding, affecting the optical properties. In addition, the existing preparation process is mostly carried out manually step by step, lacking high-integration process control, so that the prepared anti-reflection film has problems such as high refractive index. Summary of the invention

[0004] To achieve the above object, the present invention discloses an anti-reflection optical film, comprising:

[0005] A base film and an anti-reflection coating applied on the surface of the base film;

[0006] The anti-reflective coating comprises the following components:

[0007] 10-14 parts by weight of acrylate, 5-10 parts by weight of silicate, 7-14 parts by weight of UV curable resin, 1-5 parts by weight of photoinitiator, 0.2-0.6 parts by weight of surfactant, 0.1-0.4 parts by weight of polar organic solvent, 10-30 parts by weight of deionized water.

[0008] Preferably, the photoinitiator is a phthalate-type photoinitiator; the surfactant is an alkyl sulfonate or a quaternary ammonium salt; and the polar organic solvent is N,N-dimethylformamide or tetrahydrofuran.

[0009] Preferably, the base film is a PET substrate.

[0010] Beneficial effects of the present invention: The present invention uses acrylate and UV curable resin for curing polymerization, and silicate, surfactant and polar organic solvent for gelation reaction to generate porous silicon polymer, and the porous silicon polymer is cross-linked with the acrylic acid curing material. The texture of the prepared low refractive index layer is more uniform, and porous refractive particles are evenly distributed. Therefore, the prepared reflective film has excellent properties such as a low refractive index.

[0011] Furthermore, the present invention adds inorganic nanoparticles and silane coupling agents. The silane coupling agent can serve as a "connector" to more evenly connect acrylate and silicate, making the texture of the prepared low refractive index layer more uniform. The inorganic nanoparticles are also evenly distributed and can also serve as refractive particles. When combined with porous refractive particles, the prepared reflective film has excellent properties such as a lower refractive index. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the structure of the anti-reflection optical film of the present invention.

[0014] Figure 2 The optical film processing flow chart of the present invention;

[0015] Figure 3 It is a schematic diagram of the coating unit structure of the present invention;

[0016] Figure 4 It is a schematic diagram of the coating roller unit structure of the present invention;

[0017] Figure 5 It is a cross-sectional view of the glue collecting tank of the present invention;

[0018] Figure 6 It is a schematic diagram of the structure of the glue thickness self-adjusting unit of the present invention;

[0019] Figure 7 It is a cross-sectional view of the brake unit of the present invention.

[0020] In the figure: 1. stirring unit; 2. coating unit; 3. drying unit; 4. winding unit; 21. material trough; 22. glue thickness self-adjusting unit; 23. coating roller unit; 24. driving unit; 25. coating roller; 26. central rotating column; 27. rotating gear; 28. driving gear; 29. ​​brake rotating groove; 20. bracket; 31. glue collecting groove; 32. opening; 33. glue scraping inclined plate; 34. telescopic adjustment rod; 35. reset shaft; 36. base film; 37. anti-reflective coating; 41. brake seat; 42. horizontal chamber; 43. reset spring; 44. weight block; 45. transmission plug; 46. push rod; 47. brake block. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, the present invention provides an anti-reflection optical film, comprising: a base film 36 and an anti-reflection coating 37 coated on the surface of the base film; wherein the anti-reflection coating comprises the following components: 10-14 parts by weight of acrylate, 5-10 parts by weight of silicate, 7-14 parts by weight of UV curable resin, 4-12 parts by weight of active diluent, 1-5 parts by weight of photoinitiator, 0.2-0.6 parts by weight of surfactant, 0.1-0.4 parts by weight of polar organic solvent, and 10-30 parts by weight of deionized water. Among them, the acrylate can be methyl 2-methacrylate or ethyl 2-methacrylate; the silicate can be tetrakis (2-methoxy-1-methylethyl) silicate or phenylpropyldimethylsiloxy silicate.

[0024] The porous silicon polymer is generated by curing and polymerizing acrylate and UV curing resin, and gelling reaction of silicate, surfactant and polar organic solvent. The porous silicon polymer is cross-linked with acrylic curing material. The texture of the low refractive index layer prepared is more uniform, and porous refractive particles are evenly distributed. Therefore, the prepared reflective film has excellent properties such as low refractive index.

[0025] Preferably, the photoinitiator is a phthalate-type photoinitiator; the surfactant is an alkyl sulfonate or a quaternary ammonium salt; and the polar organic solvent is N,N-dimethylformamide or tetrahydrofuran. Preferably, the anti-reflective coating further comprises 2-8 parts by weight of inorganic nanoparticles and 0.5-1.5 parts by weight of a silane coupling agent. Preferably, the inorganic nanoparticles are nano-silicon dioxide or nano-titanium dioxide.

[0026] By adding inorganic nanoparticles and silane coupling agents, the silane coupling agent can act as a "connector" to connect acrylates and silicates more evenly, making the texture of the prepared low refractive index layer more uniform. The inorganic nanoparticles are also evenly distributed and can also act as refractive particles. When combined with porous refractive particles, the prepared reflective film has excellent properties such as a lower refractive index.

[0027] Preferably, the anti-reflective coating further comprises 2-8 parts by weight of inorganic nanoparticles and 0.5-1.5 parts by weight of a silane coupling agent.

[0028] Preferably, the inorganic nanoparticles are nanoparticles modified by a silane coupling agent. The nanoparticles modified by a silane coupling agent are prepared by the following steps: adding 1-3 g of nanoparticles to a mixture of 10-30 ml of water and 200-300 ml of ethanol to obtain a nanoparticle dispersion; adding a silane coupling agent to the nanoparticle dispersion, wherein the amount of the silane coupling agent is 3-5% of the mass of the nanoparticles, and then drying at 105-115° C. for 2-5 hours to obtain the nanoparticles modified by the silane coupling agent.

[0029] Preferably, the nano-silicon dioxide is modified by a silane coupling agent or the nano-titanium dioxide is modified by a silane coupling agent.

[0030] Preferably, the anti-reflective coating comprises: 13-14 parts by weight of acrylate, 5-6 parts by weight of silicate, 10-12 parts by weight of UV curable resin, 2-3 parts by weight of photoinitiator, 0.3-0.4 parts by weight of surfactant, 0.3-0.4 parts by weight of polar organic solvent, 20-30 parts by weight of deionized water, 6-8 parts by weight of inorganic nanoparticles, and 1.3-1.5 parts by weight of silane coupling agent.

[0031] The present invention modifies nanoparticles by using a silane coupling agent, so that the silane coupling agent is grafted onto the surface of the nanoparticles, and the silane coupling agent groups on the surface of the nanoparticles are further connected with acrylate and silicate, so that the texture of the prepared low refractive index layer is more uniform.

[0032] The anti-reflection optical film provided by the present invention is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, comprising: various components of the anti-reflection coating, including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier, are stirred and mixed according to their corresponding weight parts to obtain glue liquid, then the glue liquid is coated on the base film, and then baked at 80-120°C for 10-30 minutes to solidify the glue liquid on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0033] With respect to the above preparation steps, the present invention finds that the existing preparation equipment has low integration and poor performance. In order to better prepare the anti-reflection optical film, the present invention also develops the preparation equipment and proposes to use integrated equipment to integrate the stirring unit, coating unit, drying unit and winding unit together, thereby improving the operation integration and further improving the performance of the prepared reflective film by controlling the coating of the coating unit.

[0034] Specifically, Figure 2 As shown, the present invention also provides an optical film processing device for processing the above anti-reflection optical film, comprising:

[0035] Stirring unit 1, each component of the anti-reflection coating is added into the stirring unit according to its corresponding weight portion to obtain a glue solution;

[0036] A coating unit 2, which is used to coat the glue on the base film 36;

[0037] A drying unit 3, into which the coated base film 36 is fed to complete the curing of the glue solution;

[0038] The winding unit 4 is used for winding the optical film.

[0039] The working principle and beneficial effects of the above technical solution are:

[0040] The present invention further discloses an optical film processing device, wherein the components of the anti-reflective coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are added into a stirring unit 1 according to their corresponding weight parts for stirring and mixing, the coating unit 2 coats the glue on the base film 36, the drying unit 3 solidifies the glue on the base film 36, and the winding unit 4 is used to complete the winding of the optical film.

[0041] like Figure 3 As shown, in one embodiment, the coating unit 2 includes:

[0042] A material tank 21, wherein the glue solution is stored in the material tank 21;

[0043] A glue thickness self-adjusting unit 22, wherein the glue thickness self-adjusting unit 22 is installed on the material tank 21 through a bracket 20;

[0044] A coating roller unit 23, the coating roller unit 23 is installed on the glue thickness self-adjusting unit 22, the base film 36 runs on the coating roller unit 23, and the glue thickness self-adjusting unit 22 is used to adjust the thickness of the glue attached to the coating roller unit 23;

[0045] A driving unit 24 is installed on the bracket 20 , and is used to control the rotation of the coating roller unit 23 .

[0046] The working principle and beneficial effects of the above technical solution are:

[0047] The driving unit 24 works, thereby driving the coating roller 23 connected to the driving unit 24 to rotate, and the coating roller 23 coats the glue in the material tank 21 on the base film 36. The glue thickness self-adjusting unit 22 is used to scrape out the glue attached to the coating roller 23 to supply glue of the required coating thickness. When there is too much glue attached to the coating roller 23, the glue thickness self-adjusting unit 22 scrapes out the excess glue, and under the weight of the excess glue, the glue thickness self-adjusting unit 22 is driven to descend, and the relative distance between the glue thickness self-adjusting unit 22 and the coating roller unit 23 remains unchanged. Under the premise of , the glue thickness self-adjusting unit 22 has a braking effect on the coating roller unit 23, reducing the rotation speed of the coating roller unit 23, thereby providing more falling time for the glue adhering to the coating roller unit 23, so as to reduce the amount of glue adhering to the coating roller unit 23, so as to quickly remove excess glue by reducing the rotation speed of the coating roller unit 23. When the excess glue has completely leaked out of the glue thickness self-adjusting unit 22, the glue thickness self-adjusting unit 22 is lifted back to its original position, and the glue thickness self-adjusting unit 22 releases the brake on the coating roller unit 23.

[0048] like Figure 4 As shown, in one embodiment, the coating roller unit 23 includes:

[0049] A coating roller 25, the bottom end of which contacts the glue in the material tank 21, and the base film 36 moves on the coating roller 25;

[0050] A central rotating column 26, wherein the central rotating column 26 is coaxially mounted on both ends of the coating roller 25;

[0051] A rotating gear 27, wherein the rotating gear 27 is mounted on the central rotating column 26;

[0052] A driving gear 28, the driving gear 28 is installed at the output end of the driving unit 24, and the driving gear 28 is meshed with the rotating gear 27;

[0053] The brake groove 29 is provided at the end of the central rotating column 26 away from the coating roller 25 , and the glue thickness self-adjusting unit 22 is brake-connected in the brake groove 29 .

[0054] The working principle and beneficial effects of the above technical solution are:

[0055] The driving unit 24 installed on the bracket 20 works, thereby driving the driving gear 28 installed on the output end of the driving unit 24 to rotate. The driving gear 28 drives the central rotating column 26 connected to the rotating gear 27 to rotate through the rotating gear 27 meshing with it. The central rotating column 26 drives the coating roller 25 to rotate in the bracket 20 to complete the contact between the surface of the coating roller 25 and the glue in the material tank 21.

[0056] like Figure 5 , Figure 6 As shown, in one embodiment, the glue thickness self-adjusting unit 22 includes:

[0057] A glue collecting tank 31, wherein the glue collecting tank 31 is arranged close to the coating roller 25 and is located above the material tank 21;

[0058] An opening 32, the opening 32 is opened at the end of the glue collecting tank 31 close to the coating roller 25;

[0059] A scraper inclined plate 33, the scraper inclined plate 33 is installed in the opening 32, and the lower end of the scraper inclined plate 33 is arranged close to the coating roller 25;

[0060] Glue outlet holes, a plurality of the glue outlet holes are provided at the bottom end of the glue collecting tank 31;

[0061] Telescopic adjustment rods 34, two telescopic adjustment rods 34 are mounted one by one at both ends of the glue collecting groove 31 in the length direction;

[0062] A shaft mounting groove, the shaft mounting groove is provided at the inner end of the bracket 20;

[0063] The reset shaft 35 has one end installed in the shaft installation groove through a reset coil spring, and the other end of the reset shaft 35 is installed in the brake groove 29 through a brake unit. The telescopic adjustment rod 34 is connected to the reset shaft 35 at the end away from the glue collecting groove 31.

[0064] The working principle and beneficial effects of the above technical solution are:

[0065] The distance between the coating roller 25 and the scraper 33 is increased according to the required coating thickness of the glue. The distance between the scraper 33 and the coating roller 25 is increased, so that a large amount of glue is reserved on the coating roller 25. Conversely, when the thickness of the glue to be coated decreases, the distance between the scraper 33 and the coating roller 25 is decreased, so that a small amount of glue is reserved on the coating roller 25. The bottom end of the coating roller 25 contacts the glue in the material tank 21, which is limited by the liquid level of the glue in the material tank 21. The higher the liquid level of the glue in the material tank 21 is, the larger the contact area between the bottom end of the coating roller 25 and the glue is. When the amount of glue pumped into the material tank 21 is too much, causing the liquid level of the glue in the material tank 21 to be too high, the bottom end of the coating roller 25 is stained with too much glue, and as the coating roller 25 rotates clockwise, the glue is scraped off. The inclined plate 33 scrapes the excess glue along the bottom end of the scraping inclined plate 33 into the glue collecting groove 31. As the excess glue in the glue collecting groove 31 cannot leak out from the glue outlet hole, the weight of the glue collecting groove 31 increases, and the glue collecting groove 31 presses down the telescopic adjustment rod 34. The glue collecting groove 31 rotates with the central rotating column 26 as the center and the telescopic adjustment rod 34 as the radius. The distance between the scraping inclined plate 33 and the coating roller 25 remains unchanged, and the reset shaft 35 connected to the telescopic adjustment rod 34 drives the brake unit to rotate in the brake rotating groove 29, thereby generating a braking force on the central rotating column 26, reducing the rotation speed of the central rotating column 26 and the coating roller 25 connected to the central rotating column 26, thereby providing more falling time for the glue attached to the coating roller unit 23. At this time, the reset coil spring is stressed, and as the excess glue leaks out of the collecting groove 31, the weight of the glue collecting groove 31 decreases, and the glue collecting groove 31 is lifted again under the return action of the reset coil spring.

[0066] That is to say, the thickness of the coated glue is controlled by controlling the amount of glue attached to the coating roller 25. If the amount of glue attached to the coating roller 25 is large, the amount of glue attached to the base film when it moves on the coating roller 25 will be large, so the thickness of the glue will be thick.

[0067] like Figure 6 , Figure 7 As shown, in one embodiment, the braking unit includes:

[0068] A brake seat 41, the brake seat 41 is installed at the other end of the reset shaft 35, the cross section of the brake seat 41 is set to be a circular shape with a notch, and the brake seat 41 is rotatably connected to the inner wall of the brake groove 29;

[0069] A horizontal chamber 42, wherein the horizontal chamber 42 is located in the brake seat 41;

[0070] A return spring 43, the return spring 43 is installed on the inner wall of the horizontal chamber 42 away from the notch;

[0071] A weight block 44, the weight block 44 is slidably located in the horizontal chamber 42, and the weight block 44 is connected to the return spring 43;

[0072] A transmission plug body 45, wherein the transmission plug body 45 is slidably located in the horizontal chamber 42, and the transmission plug body 45 is located at an end of the weight block 44 away from the return spring 43;

[0073] A push rod 46, the push rod 46 extends from the notch into the horizontal chamber 42, and the push rod 46 is connected to the transmission plug body 45;

[0074] A brake block 47, the brake block 47 is located in the notch, the brake block 47 is connected to the push rod 46, and the brake block 47 is against the inner wall of the brake groove 29;

[0075] Positive pressure gas is stored in the horizontal chamber 42 between the weight block 44 and the transmission plug body 45 .

[0076] The working principle and beneficial effects of the above technical solution are:

[0077] When the deadweight of the rubber collecting groove 31 is too large, the telescopic adjusting rod 34 is pressed down, thereby driving the reset shaft 35 connected to the downward pressing telescopic rod 34 to rotate counterclockwise, thereby driving the brake seat 41 connected to the reset shaft 35 to rotate counterclockwise in the brake rotating groove 29. At this time, the horizontal chamber 42 is in a state of lower left and higher right. The weight block 44 in the horizontal chamber 42 slides toward the direction close to the transmission plug body 45 under the action of gravity, the reset spring 43 is stretched by force, and the weight block 44 presses the positive pressure gas, so that the transmission plug body 45 is in the water. The horizontal chamber 42 transmits the transmission in the reverse direction away from the weight block 44, and the transmission plug 45 drives the brake block 47 to press against the inner wall of the brake rotating groove 29 through the push rod 46, thereby generating a braking force on the central rotating column 26 to reduce the rotation speed of the coating roller 25 connected to the central rotating column 26. When the self-weight of the rubber collecting roller 31 returns to normal and is lifted, the horizontal chamber 42 in the brake seat 41 returns to a horizontal state. Under the return action of the reset spring 43, the weight block 44 returns, and the brake block 47 releases the braking force on the inner wall of the brake rotating groove 29.

[0078] In one embodiment, the driving unit 24 is a driving motor.

[0079] The anti-reflection optical film provided by the present invention is further described below with reference to the embodiments.

[0080] Example 1

[0081] The anti-reflection optical film provided in this embodiment includes: a PET base film and an anti-reflection coating coated on the surface of the PET base film; wherein the anti-reflection coating includes the following components: 10 parts by weight of ethyl 2-methacrylate, 5 parts by weight of tetrakis(2-methoxy-1-methylethyl) silicate, 7 parts by weight of UV-curable polyurethane acrylic resin, 1 part by weight of phthalic acid ester type photoinitiator, 0.2 parts by weight of quaternary ammonium salt surfactant, 0.1 parts by weight of N,N-dimethylformamide, and 10 parts by weight of deionized water.

[0082] The anti-reflection optical film provided in this embodiment is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, including: the components of the anti-reflection coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are stirred and mixed according to their corresponding weight parts to obtain a glue solution, and then the glue solution is coated on the base film, and then baked at 80°C for 30 minutes to solidify the glue solution on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0083] Example 2

[0084] The anti-reflection optical film provided in this embodiment includes: a PET base film and an anti-reflection coating coated on the surface of the PET base film; wherein the anti-reflection coating includes the following components: 14 parts by weight of ethyl 2-methacrylate, 10 parts by weight of tetrakis(2-methoxy-1-methylethyl) silicate, 14 parts by weight of UV-curable polyurethane acrylic resin, 5 parts by weight of phthalic acid ester type photoinitiator, 0.6 parts by weight of quaternary ammonium salt surfactant, 0.4 parts by weight of N,N-dimethylformamide, and 30 parts by weight of deionized water.

[0085] The anti-reflection optical film provided in this embodiment is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, including: the components of the anti-reflection coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are stirred and mixed according to their corresponding weight parts to obtain a glue solution, and then the glue solution is coated on the base film, and then baked at 120°C for 10 minutes to solidify the glue solution on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0086] Example 3

[0087] The anti-reflection optical film provided in this embodiment includes: a PET base film and an anti-reflection coating coated on the surface of the PET base film; wherein the anti-reflection coating includes the following components: 13 parts by weight of ethyl 2-methacrylate, 6 parts by weight of tetrakis(2-methoxy-1-methylethyl) silicate, 10 parts by weight of UV-curable polyurethane acrylic resin, 2 parts by weight of phthalic acid ester type photoinitiator, 0.3 parts by weight of quaternary ammonium salt surfactant, 0.3 parts by weight of N,N-dimethylformamide, and 20 parts by weight of deionized water.

[0088] The anti-reflection optical film provided in this embodiment is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, including: the components of the anti-reflection coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are stirred and mixed according to their corresponding weight parts to obtain a glue solution, and then the glue solution is coated on the base film, and then baked at 100° C. for 20 minutes to solidify the glue solution on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0089] Example 4

[0090] The anti-reflection optical film provided in this embodiment comprises: a PET base film and an anti-reflection coating coated on the surface of the PET base film; wherein the anti-reflection coating comprises the following components: 13 parts by weight of ethyl 2-methacrylate, 6 parts by weight of tetrakis(2-methoxy-1-methylethyl) silicate, 10 parts by weight of UV curable polyurethane acrylic resin, 2 parts by weight of phthalic acid ester type photoinitiator, 0.3 parts by weight of quaternary ammonium salt surfactant, 0.3 parts by weight of N,N-dimethylformamide, 20 parts by weight of deionized water, 2 parts by weight of nano silicon dioxide (154m 2 / g), 0.5 parts by weight of silane coupling agent KH550.

[0091] The anti-reflection optical film provided in this embodiment is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, including: the components of the anti-reflection coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are stirred and mixed according to their corresponding weight parts to obtain a glue solution, and then the glue solution is coated on the base film, and then baked at 100° C. for 20 minutes to solidify the glue solution on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0092] Example 5

[0093] The anti-reflection optical film provided in this embodiment comprises: a PET base film and an anti-reflection coating coated on the surface of the PET base film; wherein the anti-reflection coating comprises the following components: 13 parts by weight of ethyl 2-methacrylate, 6 parts by weight of tetrakis(2-methoxy-1-methylethyl) silicate, 10 parts by weight of UV curable polyurethane acrylic resin, 2 parts by weight of phthalic acid ester type photoinitiator, 0.3 parts by weight of quaternary ammonium salt surfactant, 0.3 parts by weight of N,N-dimethylformamide, 20 parts by weight of deionized water, 8 parts by weight of nano silicon dioxide (154m 2 / g), 1.5 parts by weight of silane coupling agent KH550.

[0094] The anti-reflection optical film provided in this embodiment is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, including: the components of the anti-reflection coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are stirred and mixed according to their corresponding weight parts to obtain a glue solution, and then the glue solution is coated on the base film, and then baked at 100° C. for 20 minutes to solidify the glue solution on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0095] Example 6

[0096] The anti-reflection optical film provided in this embodiment includes: a PET base film and an anti-reflection coating coated on the surface of the PET base film; wherein the anti-reflection coating includes the following components: 13 parts by weight of 2-ethyl methacrylate, 6 parts by weight of tetrakis(2-methoxy-1-methylethyl) silicate, 10 parts by weight of UV-curable polyurethane acrylic resin, 2 parts by weight of phthalic acid ester type photoinitiator, 0.3 parts by weight of quaternary ammonium salt surfactant, 0.3 parts by weight of N,N-dimethylformamide, 20 parts by weight of deionized water, 6 parts by weight of silane coupling agent modified nano-silica, and 1.3 parts by weight of silane coupling agent KH550.

[0097] The silane coupling agent modified nanoparticles are prepared by the following steps: adding 1g of nanoparticles to a mixture of 10ml of water and 200ml of ethanol to obtain a nanoparticle dispersion; adding a silane coupling agent to the nanoparticle dispersion, wherein the amount of the silane coupling agent is 3% of the mass of the nanoparticles, and then drying at 105°C for 5 hours to obtain silane coupling agent modified nanoparticles.

[0098] The anti-reflection optical film provided in this embodiment is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, including: the components of the anti-reflection coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are stirred and mixed according to their corresponding weight parts to obtain a glue solution, and then the glue solution is coated on the base film, and then baked at 100° C. for 20 minutes to solidify the glue solution on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0099] Example 7

[0100] The anti-reflection optical film provided in this embodiment includes: a PET base film and an anti-reflection coating coated on the surface of the PET base film; wherein the anti-reflection coating includes the following components: 13 parts by weight of 2-ethyl methacrylate, 6 parts by weight of tetrakis(2-methoxy-1-methylethyl) silicate, 10 parts by weight of UV-curable polyurethane acrylic resin, 2 parts by weight of phthalic acid ester type photoinitiator, 0.3 parts by weight of quaternary ammonium salt surfactant, 0.3 parts by weight of N,N-dimethylformamide, 20 parts by weight of deionized water, 6 parts by weight of silane coupling agent modified nano-silica, and 1.3 parts by weight of silane coupling agent KH550.

[0101] The silane coupling agent modified nanoparticles are prepared by the following steps: adding 3 g of nanoparticles to a mixture of 30 ml of water and 300 ml of ethanol to obtain a nanoparticle dispersion; adding a silane coupling agent to the nanoparticle dispersion, wherein the amount of the silane coupling agent is 5% of the mass of the nanoparticles, and then drying at 115° C. for 5 hours to obtain silane coupling agent modified nanoparticles.

[0102] The anti-reflection optical film provided in this embodiment is prepared by the following steps: first, a base film is provided; then, an anti-reflection coating is prepared on the base film, including: the components of the anti-reflection coating including deionized water, acrylic emulsion, UV curing resin, active diluent, auxiliary agent and modifier are stirred and mixed according to their corresponding weight parts to obtain a glue solution, and then the glue solution is coated on the base film, and then baked at 80-120° C. for 10-30 minutes to solidify the glue solution on the base film to obtain the anti-reflection coating; finally, the anti-reflection optical film is obtained after rolling.

[0103] Comparative Example

[0104] The anti-reflection optical film provided in this comparative example includes: a PET base film and a nitrogen-free dielectric anti-reflection coating coated on the surface of the PET base film.

[0105] The refractive index of Examples 1-9 and the comparative example was measured by ellipsometry using an ellipsometer of model UVISEL-ER produced by HORIBA. The test results are as follows.

[0106] Refractive Index Example 1 1.44 Example 2 1.44 Example 3 1.43 Example 4 1.40 Example 5 1.41 Example 6 1.33 Example 7 1.32 Comparative Example 1.58

[0107] It can be seen from the above data that the anti-reflection optical film prepared by the embodiment of the present invention has a refractive index of 1.32-1.44, which is much lower than 1.58 of the comparative example, proving that the reflective film prepared by the present invention has excellent properties such as a lower refractive index. In particular, in Examples 6 and 7, the performance is significantly better due to the use of silane coupling agent to modify nano-silicon dioxide. It should be noted that Examples 1-7 are all carried out using existing preparation equipment. It can be expected that the reflective film prepared by the subsequent preparation equipment provided by the present invention will have better performance.

[0108] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An anti-reflection optical film, characterized in that: include: A base film and an anti-reflection coating applied on the surface of the base film; The anti-reflective coating comprises the following components: 10-14 parts by weight of acrylate, 5-10 parts by weight of silicate, 7-14 parts by weight of UV curable resin, 1-5 parts by weight of photoinitiator, 0.2-0.6 parts by weight of surfactant, 0.1-0.4 parts by weight of polar organic solvent, 10-30 parts by weight of deionized water; The photoinitiator is a phthalate-type photoinitiator; the surfactant is an alkyl sulfonate or a quaternary ammonium salt; the polar organic solvent is N,N-dimethylformamide or tetrahydrofuran; The anti-reflective coating further comprises 2-8 parts by weight of inorganic nanoparticles and 0.5-1.5 parts by weight of a silane coupling agent; The silicate is tetrakis(2-methoxy-1-methylethyl) silicate.

2. The anti-reflection optical film according to claim 1, characterized in that: The acrylic acid ester is methyl 2-methacrylate or ethyl 2-methacrylate.

3. The anti-reflection optical film according to claim 1, characterized in that: The base film is a PET base material.

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