CN107840982B - High-definition anti-dazzle optical hardening film - Google Patents
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Abstract
The invention discloses a high-definition anti-dazzle optical hardening film, which comprises a transparent support and an anti-dazzle layer coated on any surface of the transparent support; the anti-glare layer is formed by curing a coating liquid consisting of acrylate resin, a photoinitiator, a flatting agent, a dispersing agent, nano silicon dioxide dispersion liquid, ammonium salt and an organic solvent; the high-definition anti-dazzle optical hardening film has the haze of 1-50% and the thickness of an anti-dazzle layer of 0.5-8 mu m; the particles in the anti-dazzle layer grow from nano silicon dioxide particles in the coating liquid for the anti-dazzle layer into silicon dioxide micron-sized particles with controllable and uniform particle size. The high-definition anti-dazzle optical hardening film prepared by the invention can be widely applied to various fields of various protective films, polaroids, LCD backlight modules and the like.
Description
Technical Field
The invention relates to a film, in particular to an anti-dazzle optical hardening film.
Background
The glare is mainly due to the fact that a light source with extremely high brightness in the environment forms strong brightness contrast through reflection, and the glare is generated by human eyes in the whole body. At present, the proportion of glare generated by liquid crystal display equipment is very large, the glare of the liquid crystal display equipment generally acts on human eyes by mutually overlapping light emitted by the liquid crystal display equipment and light reflected by a light source in an environment on a display screen, long-term glare can not only cause uncomfortable feeling in vision, but also strong glare can damage vision and even cause blindness. Therefore, the surfaces of various liquid crystal display devices in the market are all adhered with the hard films with the anti-dazzle effect, and the hard films also have the characteristic of high definition.
Most of the existing anti-dazzle optical hardening films are formed by adding particles into a coating liquid, and when a light source irradiates the surface of the hardening film and the particles pass through, diffused reflection occurs, so that glare is reduced. However, particles added to a conventional antiglare optical hardening film tend to agglomerate during storage, resulting in a larger secondary particle size. When in use, the particles need to be dispersed for a long time, and even the particles need to be ball-milled to disperse the secondary particle size into the primary particle size. The particle size stability of the dispersed particles is poor, part of agglomerated particles exist in the coating liquid, and the agglomerated particles stably exist on the surface of the coating after curing, so that the particle size of the particles on the surface of the coating is not uniform, the scattering of light is intensified, the definition of a display is reduced, and the visual impression is influenced.
Disclosure of Invention
The invention aims to solve the technical problem in the prior art and provides a high-definition anti-dazzle optical hardening film.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a high-definition anti-dazzle optical hardening film comprises a transparent support body and an anti-dazzle layer coated on any surface of the transparent support body, wherein the anti-dazzle layer is prepared by preparing coating liquid from the following components and coating and curing the coating liquid:
the high-definition anti-dazzle optical hardening film is characterized in that the transparent support is one of a cellulose triacetate film, a polyethylene terephthalate film, a polycarbonate film, a polymethyl methacrylate film or a cycloolefin film, and the thickness of the transparent support is 25-300 mu m.
The functionality of the polyurethane acrylate resin is 4-10.
In the high-definition anti-dazzle optical hardening film, the primary particle size of the silicon dioxide in the nano silicon dioxide dispersion liquid is 10 nm-100 nm.
The thickness of the anti-dazzle layer of the high-definition anti-dazzle optical hardening film is 0.5-8 mu m.
The high-definition anti-dazzle optical hardening film has the haze of 1-50%.
The coating liquid used for the anti-glare layer is prepared by the following steps:
firstly, putting polyurethane acrylate resin into a container, adding a solvent for dilution, stirring at a low speed of 300 r/min-500 r/min by a stirrer, sequentially adding a photoinitiator, a leveling agent and a dispersing auxiliary agent after the polyurethane acrylate resin is completely dissolved, stirring for 20 min-30 min, and stopping the machine for standby application;
secondly, placing the nano silicon dioxide dispersion liquid into another container, dropwise adding the mixed liquid prepared in the first step at the speed of 1-4 g/min, and stirring at the rotating speed of a stirrer of 300-500 r/min until the dropwise adding is finished;
thirdly, dropping ammonium salt into the mixed liquid container prepared in the second step, wherein the rotating speed of the mixer is increased to 1000 r/min-1500 r/min and stirring is carried out for 30 min-50 min during dropping; finally, the speed of the stirrer is reduced to 100 r/min-300 r/min, and the mixture is stirred for 1 h-1.5 h.
The mass ratio of ammonium salt to nano silicon dioxide dispersion liquid in the coating liquid for the anti-glare layer is 1: 1.5-1: 0.75, and the secondary particle size of silicon dioxide in the nano silicon dioxide dispersion liquid is 1-4.5 microns.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, by selecting the formula components of the coating liquid for the anti-glare layer and controlling the secondary particle size of the silicon dioxide particles in the coating liquid, the anti-glare optical hardening film with various haze can be prepared; in addition, the silica particles growing up in the coating liquid have large surface area and good particle size uniformity, and have better anti-dazzle effect compared with the traditional film added with the particles.
2. The high-definition anti-dazzle optical hardening film prepared by the invention has high degree of dispersion homogenization of silicon dioxide particles in the anti-dazzle layer, and compared with anti-dazzle optical hardening films prepared by other methods, the anti-dazzle optical hardening film prepared by the invention has high reduction degree of picture color, no flash point and higher definition when in use.
Drawings
FIG. 1 is a schematic view of the interlayer structure of the present invention.
In the drawings, the reference numerals denote: 1: a transparent support; 2: an anti-glare layer; 3: silica particles.
Detailed Description
In order to enable the anti-glare film to have certain hardness and wear resistance, the selected polyurethane acrylate resin is an aliphatic polyurethane acrylate prepolymer or an aromatic polyurethane acrylate prepolymer with the functionality of 4-10, such as: 4-functional aliphatic urethane acrylate, 5-functional aliphatic urethane acrylate, 6-functional aliphatic urethane acrylate, 7-functional aliphatic urethane acrylate, 8-functional aliphatic urethane acrylate, 9-functional aliphatic urethane acrylate, 10-functional aliphatic urethane acrylate, 4-functional aromatic urethane acrylate, 5-functional aromatic urethane acrylate, 6-functional aromatic urethane acrylate, 7-functional aromatic urethane acrylate, 8-functional aromatic urethane acrylate, 9-functional aromatic urethane acrylate, 10-functional aromatic urethane acrylate, and the like. The amount of the urethane acrylate resin is controlled to be 20 to 60 parts by weight.
The photoinitiator in the invention is a free radical polymerization photoinitiator, and the common free radical polymerization photoinitiators comprise: 1-hydroxycyclohexylphenylketone (184), 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone (907), benzoin dimethyl ether (651), 2, 4, 6 (trimethylbenzoyl) diphenylphosphine oxide (TPO), 2-Isopropylthioxanthone (ITX), and the like. These photoinitiators may be used alone or in combination of two or more, and the amount of the photoinitiator added is controlled to 0.50 to 5 parts by weight.
In order to improve the flatness of the coating, the invention adds a leveling agent into the coating liquid, and the commonly used leveling agent is selected from a commercially available acrylic leveling agent or organic silicon leveling agent, such as: BYK-307, BYK-377, BYK-354, BYK-306, BYK-333 in Pico chemistry, Levaslip 407, Levaslip410, Levaslip 411, Levaslip432, Levaslip 466 in Somi chemistry, and the like. The amount of the leveling agent is preferably 0.50 to 1 part by weight.
In the invention, in order to make the distribution of coating particles more uniform, a dispersing agent is added into the coating liquid, and the commonly used dispersing agent is selected from BYK-2000, BYK-111, BYK-2008, BYK-108, BYK-1008 and the like of Pico chemistry. The amount of the dispersant is preferably 0.50 to 5 parts by weight.
The nano silicon dioxide dispersion used in the invention is a dispersion of silicon dioxide particles in an organic solvent, the initial particle size of the silicon dioxide is 10 nm-100 nm, and the content of the silicon dioxide is 25% -50%. The solvent in the common nano silicon dioxide dispersion liquid is alcohols and ketones, and the common alcohols are methanol and isopropanol; ketones such as acetone, butanone, methyl ethyl ketone. The amount of the nano-silica dispersion is preferably 0.75 to 10 parts by weight based on the isopropyl alcohol as a solvent.
In order to control the secondary particle size of the nano-silicon dioxide, the common ammonium salts comprise: triethanolamine (TEA), 2-amino-2-methyl-1-propanol (AMP-5), Dimethylethanolamine (DMAE), Monoethanolamine (MAE), Diethanolamine (DEA), Triethanolamine (TEA). The amount of the ammonium salt added is preferably 0.50 to 10 parts by weight.
The coating composition of the present invention may contain an organic solvent, which is added in consideration of the boiling point of the solvent and the surface tension. The organic solvent is selected from alcohols, ketones, aromatic hydrocarbons, alcohols such as methanol, ethanol, propanol and butanol; ketones such as acetone, butanone, methyl ethyl ketone, 2-pentanone, and isophorone; esters such as ethyl acetate and butyl acetate; aromatic hydrocarbons such as toluene and xylene. The organic solvent can be used singly or in a mixture of two or more kinds according to a certain proportion, and the adding amount is controlled to be 20 to 60 parts by weight.
The preparation of the coating liquid for an antiglare layer of the present invention can be prepared by: firstly, in an indoor environment with the temperature and humidity of 23-26 ℃ and 50-55% RH, taking a certain amount of polyurethane acrylate resin, putting the polyurethane acrylate resin into a container, adding a solvent for dilution, stirring at a low speed of 300-500 r/min by a stirrer, sequentially adding a photoinitiator, a leveling agent and a dispersing aid after the polyurethane acrylate resin is completely dissolved, stirring for 20-30 min, and stopping for later use; secondly, placing the nano silicon dioxide dispersion liquid into another container in an indoor environment with the temperature and humidity of 23-26 ℃ and 50-55% RH, dropwise adding the mixed liquid prepared in the first step at the speed of 1-4 g/min, and stirring at the rotating speed of a stirrer of 300-500 r/min until the dropwise adding is finished; thirdly, ammonium salt with a preset proportion is dripped into the mixed liquid container prepared in the second step, and the rotation speed of a mixer is increased to 1000 r/min-1500 r/min to be stirred for 30 min-50 min when the ammonium salt is dripped; finally, the speed of the stirrer is reduced to 100 r/min-300 r/min, and the mixture is stirred for 1 h-1.5 h for standby.
The secondary particle size of the silicon dioxide particles in the coating liquid for the anti-glare layer is controlled by the proportion of the amount of ammonium salt in the coating liquid to the nano silicon dioxide dispersion liquid; the ratio of the amount of ammonium salt to the nano-silica dispersion is controlled to be 1:1.5, the secondary particle size of the silicon dioxide particles is 1-1.5 μm and accounts for more than 95 percent, and when the silicon dioxide particles are used for preparing the low-haze anti-dazzle optical hardening film, the thickness of the coating can be reduced, and the definition is higher; the ratio of the amount of ammonium salt to the nano-silica dispersion is controlled to be 1: when the particle size is 1.25, the secondary particle size of the silicon dioxide particles is 2-2.5 μm and accounts for more than 95 percent; the ratio of the amount of ammonium salt to the nano-silica dispersion is controlled to be 1:1, the particle size of the grown silicon dioxide particles is more than 95 percent between 3 and 3.5 microns; the ratio of the amount of ammonium salt to the nano-silica dispersion is controlled to be 1: when the particle diameter is 0.75, the secondary particle diameter of the silicon dioxide particles is 4-4.5 μm and accounts for more than 95 percent, and the silicon dioxide particles can be used for preparing an anti-dazzle optical hardening film with high haze. According to the haze and the thickness of the anti-dazzle layer of different anti-dazzle optical hardening films, the growth of the nano silicon dioxide particles in the coating liquid can be regulated and controlled to form adaptive micron-sized particles, and the overall controllable range of the secondary particle size of the silicon dioxide particles in the coating liquid is between 1 and 4.5 micrometers.
The preparation of the high-definition anti-dazzle optical hardening film needs to be completed step by step through the preparation of coating liquid, coating, drying and Ultraviolet (UV) curing. Preparing a coating liquid, and coating the coating liquid on a transparent base material in a gravure roll coating mode; and drying the coating for 1-5 min in a drying oven, and curing the dried coating in an Ultraviolet (UV) curing stage to obtain the high-definition anti-dazzle optical hardening film with the haze of 1-50% and the thickness of 0.5-8 mu m.
The transparent support is one of a cellulose triacetate film, a polyethylene terephthalate film, a polycarbonate film, a polymethyl methacrylate film and a cycloolefin film, and the thickness range of the transparent support is 25-300 mu m. Preferred are cellulose triacetate films and polyethylene terephthalate films.
The present invention will be described in more detail with reference to the following examples, but the embodiments of the present invention are not limited to the following examples.
Example 1
(1) Preparation of anti-glare coating liquid:
firstly, putting 32.25 g of aliphatic polyurethane acrylate DRU-029 (Changxing chemical materials Co., Ltd., functionality of 4) into a 500ml beaker in an indoor environment with the temperature and humidity of 25 ℃ and 50% RH, adding 48 g of ethyl acetate and 17 g of butanone solvent for dilution, stirring at a low speed of 400r/min by a stirrer, sequentially adding 0.5 g of photoinitiator 184 (Tianjin Tianjiao chemical industries Co., Ltd.), 0.5 g of flatting agent BYK-377 (Bike chemistry), 0.5 g of dispersant BYK-2000 (Bike chemistry), stirring for 20min after resin is completely dissolved, and stopping the machine for standby; secondly, in an indoor environment with the temperature and humidity of 25 ℃ and 50% RH, 0.75 g of nano silicon dioxide dispersion liquid [ Yuguo pigment, the initial particle size is 10nm and the silicon dioxide content is 25% ] is placed in another 500ml beaker, the mixed liquid prepared in the first step is added dropwise at the speed of 2g/min, and the stirring is carried out at the rotating speed of a stirrer of 400r/min until the dropwise addition is finished; thirdly, 0.5 g of triethanolamine (Jinan jun recycling) is dripped into the mixed liquid container prepared in the second step, and the rotation speed of a mixer is increased to 1000r/min and the mixed liquid is stirred for 30min when the triethanolamine is dripped; and finally, reducing the speed of the stirrer to 200r/min, and stirring for 1h to ensure that the secondary particle size of the silicon dioxide particles is 1-1.5 microns for later use.
Coating the coating liquid prepared above on any one side of a polycarbonate film with a thickness of 25 μm, placing in a drying oven with a set temperature of 85 ℃ for drying for 2min, and then applying energy of 400mJ/cm2The high-definition anti-glare hardened film with the thickness of 0.5 mu m and the haze of 1% can be prepared by irradiating the film with the UV light source and curing the film twice, and the evaluation results are listed in Table 1.
Example 2
(1) Preparation of anti-glare coating liquid:
firstly, in an indoor environment with the temperature and humidity of 23 ℃ and 50% RH, 20 g of aromatic urethane acrylate CN975NS [ sartomer, functionality of 6] is put into a 500ml beaker, 64.5 g of toluene solvent is added for dilution, the mixture is stirred at a low speed of 500r/min by a stirrer, after the resin is completely dissolved, 3.5 g of photoinitiator 184[ Tianjin Tianjiao Jiaojiao chemical Co., Ltd ], 1.5 g of photoinitiator 907[ Tianjin Tianjiao chemical Co., Ltd ], 0.5 g of flatting agent Levaslip432[ Delhi chemical Co., 5 g of dispersant BYK-171[ Bike chemical ], the mixture is stirred for 20min and stopped for standby application; secondly, in an indoor environment with the temperature and humidity of 25 ℃ and 50% RH, 3g of nano silicon dioxide dispersion liquid (Yuguo pigment, the initial particle size is 30nm and the silicon dioxide content is 30%) is placed in another 500ml beaker, the mixed liquid prepared in the first step is dripped at the speed of 4g/min, and the stirring is carried out at the rotating speed of a stirrer of 500r/min until the dripping is finished; thirdly, 2g of dimethylethanolamine (namely the Jinan jun chemical industry) is dripped into the mixed liquid container prepared in the second step, and the rotating speed of a mixer is increased to 1500r/min to be stirred for 30min when the dimethylethanolamine is dripped; finally, the speed of the stirrer is reduced to 100r/min, and the mixture is stirred for 1.5h, so that the secondary particle size of the silicon dioxide particles is 1-1.5 μm for later use.
Coating the coating liquid prepared above on any one side of a cycloolefin film having a thickness of 80 μm, placing in a drying oven set at 85 deg.C for drying for 2min, and then applying energy of 400mJ/cm2The high-definition anti-glare hardened film with the thickness of 1 mu m and the haze of 3% can be prepared by irradiating the film with the UV light source and curing the film twice, and the evaluation results are listed in Table 1.
Example 3
(1) Preparation of anti-glare coating liquid:
firstly, in an indoor environment with the temperature and humidity of 25 ℃ and 55% RH, taking 40 g of aliphatic polyurethane acrylate CN9013NS [ Saduoma, functionality of 9] and putting into a 500ml beaker, adding 46.5 g of butanone solvent for dilution, stirring at a low speed of 500r/min by a stirrer, after the resin is completely dissolved, sequentially adding 5 g of photoinitiator 1173[ Tianjin Tianjiao chemical Co., Ltd ], 1g of flatting agent Levaslip410[ Delhi chemical Co., Ltd ], 3g of dispersant BYK-2008[ Bikechemistry ], stirring for 30min, and stopping the machine for standby; secondly, placing 2.5 g of nano silicon dioxide dispersion liquid [ Yuguo pigment, the initial particle size is 50nm, and the silicon dioxide content is 40% ] in another 500ml beaker in an indoor environment with the temperature and humidity of 25 ℃ and 50% RH, dropwise adding the mixed liquid prepared in the first step at the speed of 3g/min, and stirring at the rotating speed of a stirrer of 500r/min until the dropwise adding is finished; thirdly, 2g of diethanolamine (chemical industry of Jinnanjian) is dripped into the mixed liquid container prepared in the second step, and the rotating speed of a mixer is increased to 1000r/min during dripping, and the mixture is stirred for 40 min; finally, the speed of the stirrer is reduced to 300r/min, and the mixture is stirred for 1h, so that the secondary particle size of the silicon dioxide particles is 2-2.5 microns for later use;
coating the coating liquid prepared above on any one side of a cellulose triacetate film having a thickness of 130 μm, drying in a drying oven set at 85 deg.C for 2min, and applying energy of 400mJ/cm2The high-definition anti-glare hardened film with the thickness of 3 mu m and the haze of 25% can be prepared by irradiating the film with the UV light source and curing the film twice, and the evaluation results are listed in Table 1.
Example 4
(1) Preparation of anti-glare coating liquid:
step one, in an indoor environment with the temperature and humidity of 25 ℃ and 53% RH, 60 g of aliphatic polyurethane acrylate 6145-100 (Changxing chemical materials Co., Ltd., functionality of 6) is placed into a 500ml beaker, 10 g of methyl isobutyl ketone solvent is added for dilution, the mixture is stirred at the low speed of 300r/min by a stirrer, after the resin is completely dissolved, 5 g of photoinitiator TPO (Tianjin Tianjia chemical Co., Ltd.), 1g of flatting agent BYK-350[ Bike chemistry ], 4g of dispersant BYK-108[ Bike chemistry ] are sequentially added for stirring for 30min, and the machine is stopped for standby; secondly, in an indoor environment with the temperature and humidity of 25 ℃ and 50% RH, 10 g of nano silicon dioxide dispersion liquid (Yuguo pigment, the initial particle size is 50nm and the silicon dioxide content is 50%) is placed in another 500ml beaker, the mixed liquid prepared in the first step is dripped at the speed of 2g/min, and the stirring is carried out at the rotating speed of a stirrer of 300r/min until the dripping is finished; thirdly, 10 g of butyl diethanol amine (Jinan jun recycling industry) is dripped into the mixed liquid container prepared in the second step, the rotating speed of a mixer is increased to 1200r/min during dripping, and the stirring is carried out for 50 min; finally, the speed of the stirrer is reduced to 100r/min, and the mixture is stirred for 1h, so that the secondary particle size of the nano silicon dioxide particles is 3-3.5 microns for later use;
coating the coating liquid prepared above on any one side of a polymethyl methacrylate film with a thickness of 250 μm, placing in a drying oven with a set temperature of 85 ℃ for drying for 2min, and then applying energy of 400mJ/cm2The high-definition anti-glare hardened film with the thickness of 8 mu m and the haze of 25% can be prepared by irradiating the film with the UV light source and curing the film twice, and the evaluation results are listed in Table 1.
Example 5
(1) Preparation of anti-glare coating liquid:
firstly, in an indoor environment with the temperature and humidity of 25 ℃ and 50% RH, taking 45 g of aliphatic polyurethane acrylate DR-U195[ Changxing chemical materials Co., Ltd., functionality of 10] and putting the aliphatic polyurethane acrylate DR-U195 into a 500ml beaker, adding 28 g of toluene for dilution, stirring at a low speed of 500r/min by a stirrer, after the resin is completely dissolved, sequentially adding 5 g of photoinitiator 651[ Tianjin Tianjiao chemical Co., Ltd ], 1g of flatting agent BYK-333[ bike chemistry ], 3.5 g of dispersant BYK-161[ bike chemistry ], stirring for 20min, and stopping the machine for standby application; secondly, in an indoor environment with the temperature and humidity of 25 ℃ and 50% RH, 7.5 g of nano silicon dioxide dispersion liquid [ Yuguo pigment, the initial particle size is 100nm and the silicon dioxide content is 40% ] is placed in another 500ml beaker, the mixed liquid prepared in the first step is added dropwise at the speed of 1g/min, and the stirring is carried out at the rotating speed of a stirrer of 500r/min until the dropwise addition is finished; thirdly, 10 g of triethanolamine (chemical industry of Jinnantianjiao) is dripped into the mixed liquid container prepared in the second step, the rotating speed of a mixer is increased to 1500r/min during dripping, and the mixture is stirred for 30 min; finally, the speed of the stirrer is reduced to 300r/min, and the mixture is stirred for 1.5h, so that the secondary particle size of the silicon dioxide particles is 4-4.5 microns for later use;
coating the coating liquid prepared above on any one side of a polyethylene terephthalate film with the thickness of 300 μm, placing in a drying oven with the set temperature of 85 ℃ for drying for 2min, and then applying energy of 400mJ/cm2The high-definition anti-glare hardened film with the thickness of 4 mu m and the haze of 50% can be prepared by irradiating the film with the UV light source and curing the film twice, and the evaluation results are listed in Table 1.
Comparative example 1
(1) Preparation of anti-glare coating liquid:
dissolving 30 g of urethane acrylate CN7011NS [ sartomer, functionality 2] into 64.95 g of ethyl acetate solvent, adding 1.5 g of photoinitiator TPO [ Tianjin Jiaozi chemical Co., Ltd ], 0.05 g of flatting agent BYK-377[ Bike chemistry ], 1.5 g of dispersant BYK-171[ Bike chemistry ], fully stirring and dissolving, adding 2g of silicon dioxide particles [ average particle size 2 mu m ], stirring for 30min at 1000r/min by a high-speed stirrer; and finally, reducing the speed of the stirrer to 200r/min, and stirring for 1h to obtain the hard coating liquid for later use.
Coating the coating liquid prepared above on any one side of a cellulose triacetate film with the thickness of 80 μm, drying in a drying oven with the set temperature of 85 deg.C for 2min, and applying energy of 400mJ/cm2The anti-dazzle hardening film with the thickness of 3 mu m and the haze of 25 percent can be prepared by irradiating the film by the UV light source and curing the film for two times.
Comparative example 2
(1) Preparation of anti-glare coating liquid:
dissolving 40 g of urethane acrylate CN8200[ sartomer, functionality of 3] into 40.25 g of toluene solvent, adding 2.5 g of photoinitiator 651[ Tianjin Jiaozhi chemical Co., Ltd ], 0.75 g of flatting agent BYK-333[ Bike chemistry ], 1.5 g of dispersant BYK-1008[ Bike chemistry ], fully stirring and dissolving, adding 10 g of silicon dioxide particles [ average particle size of 5 mu m ], stirring for 30min at 1000r/min by a high-speed stirrer; and finally, reducing the speed of the stirrer to 200r/min, and stirring for 1h to obtain the hard coating liquid for later use.
Coating the coating liquid prepared above on any one side of a polyethylene terephthalate film with a thickness of 250 μm, placing in a drying oven set at 85 deg.C for drying for 2min, and then applying energy of 400mJ/cm2The anti-dazzle hardening film with the thickness of 4 mu m and the haze of 50 percent can be prepared by irradiating the film by the UV light source and curing the film for two times.
Table 1: test data sheet for each example
The test methods for the properties in the table are as follows:
(1) particle diameter of particles in coating liquid
The particle size distribution of the particles in the coating liquid was measured by a laser particle sizer (Baite instruments, Inc., Danto, model: BT-9300S).
(2) Haze, transmittance, clarity test
The haze, the light transmittance and the clarity were measured by a transmission haze imaging instrument (ByK-4725, model number, Germany).
(3) Pencil hardness test
A coating hardness tester (Haipanshi chemical machinery Co., Ltd., model number: BY) GB/T6739-1996 standard measures pencil hardness BY using a pencil scraping coating mode.
The high-definition anti-dazzle optical hardened film prepared by the invention can be widely applied to various fields of various protective films, polaroids, LCD backlight modules and the like, and as shown in Table 1, the anti-dazzle optical hardened film prepared by the technical scheme of the invention has the characteristics of high hardness, high definition, wide haze range and the like. Comparing example 3 with comparative example 1, and example 5 with comparative example 2, it can be seen that the anti-glare optical hardening film prepared by the preparation method of the present invention has higher definition, better anti-glare effect and higher picture color reduction degree than the anti-glare optical hardening film prepared by directly adding silica particles.
Claims (5)
1. A high-definition anti-dazzle optical hardening film comprises a transparent support and an anti-dazzle layer coated on any surface of the transparent support, and is characterized in that the coating liquid for the anti-dazzle layer is prepared by coating and curing the following components:
20 to 60 parts by weight of urethane acrylate resin,
0.50 to 5 parts by weight of a photoinitiator,
0.50 to 1 weight portion of flatting agent,
0.50 to 5 parts by weight of a dispersant,
0.75 to 10 parts by weight of nano-silica dispersion,
0.50 to 10 parts by weight of ammonium salt,
10-65 parts by weight of an organic solvent;
the polyurethane acrylate resin is an aliphatic polyurethane acrylate prepolymer or an aromatic polyurethane acrylate prepolymer with the functionality of 4-10;
the mass ratio of ammonium salt to nano silicon dioxide dispersion liquid in the coating liquid for the anti-glare layer is 1: 1.5-1: 0.75, and the secondary particle size of silicon dioxide in the nano silicon dioxide dispersion liquid is 1-4.5 mu m;
when the coating liquid is prepared: firstly, in an indoor environment with the temperature and humidity of 23-26 ℃ and 50-55% RH, taking a certain amount of polyurethane acrylate resin, putting the polyurethane acrylate resin into a container, adding a solvent for dilution, stirring at a low speed of 300-500 r/min by a stirrer, sequentially adding a photoinitiator, a leveling agent and a dispersing aid after the polyurethane acrylate resin is completely dissolved, stirring for 20-30 min, and stopping for later use; secondly, placing the nano silicon dioxide dispersion liquid into another container in an indoor environment with the temperature and humidity of 23-26 ℃ and 50-55% RH, dropwise adding the mixed liquid prepared in the first step at the speed of 1-4 g/min, and stirring at the rotating speed of a stirrer of 300-500 r/min until the dropwise adding is finished; thirdly, ammonium salt with a preset proportion is dripped into the mixed liquid container prepared in the second step, and the rotation speed of a mixer is increased to 1000 r/min-1500 r/min to be stirred for 30 min-50 min when the ammonium salt is dripped; finally, the speed of the stirrer is reduced to 100 r/min-300 r/min, and the mixture is stirred for 1 h-1.5 h to obtain the coating liquid.
2. The high-definition antiglare optical hardened film according to claim 1, wherein the transparent support is one of a triacetylcellulose film, a polyethylene terephthalate film, a polycarbonate film, a polymethyl methacrylate film, a cycloolefin film, and has a thickness of 25 to 300 μm.
3. The high-definition anti-glare optical hardening film according to claim 2, wherein the primary particle size of silica in the nano silica dispersion is 10nm to 100 nm.
4. The high-definition antiglare optically-hardened film according to claim 3, wherein the antiglare layer has a thickness of 0.5 to 8 μm.
5. The high-definition anti-glare optical hardening film according to claim 4, wherein the anti-glare hardening film has a haze of 1% to 50%.
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| CN111100314B (en) * | 2019-12-19 | 2022-05-03 | 合肥乐凯科技产业有限公司 | Preparation method of anti-glare hardened film for polarizer |
| CN113671608B (en) * | 2020-06-24 | 2024-07-09 | 明基材料有限公司 | Antiglare film and polarizing plate having the same |
| CN113655554B (en) * | 2020-06-24 | 2024-03-26 | 明基材料有限公司 | Antiglare film and polarizing plate having the same |
| CN112480454A (en) * | 2020-11-17 | 2021-03-12 | 合肥乐凯科技产业有限公司 | Anti-dazzle hardening film for liquid crystal display |
| CN112562887B (en) * | 2020-11-18 | 2022-07-15 | 深圳市华科创智技术有限公司 | Nano silver wire transparent conductive film with excellent bending resistance |
| CN112724818B (en) * | 2020-12-25 | 2022-04-22 | 湖南松井新材料股份有限公司 | AG glass effect-imitated UV coating and preparation method and application thereof |
| CN114854302B (en) * | 2021-01-20 | 2023-06-06 | 宁波安特弗新材料科技有限公司 | Hardened layer coating liquid, hardened film and preparation method thereof |
| CN115850803B (en) * | 2022-11-27 | 2024-02-13 | 合肥乐凯科技产业有限公司 | Antifog anti-dazzle hardening film |
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