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Optical thin film with high covering performance

An optical film and covering technology, applied in optics, optical components, instruments, etc., can solve the problems of uniformity of dispersion, small amount of added particles, general covering, etc., to achieve excellent applicability, avoid short scratches, Improve the effect of hiding

Inactive Publication Date: 2019-03-12
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN107422530A discloses a method for preparing an atomized film with high coverage and high brightness. The atomized film includes a transparent substrate layer, a light-gathering layer, and an atomized layer. Particles and inorganic diffusion particles, the thickness of the atomized layer is 1 / 10-2 / 3 of the largest diffusion particles, and the prepared atomized film has better covering and higher brightness performance, which is used to overcome the current diffusion plate Disadvantages of large brightness loss and general hiding
[0004] The technical solutions described in the above patents improve the hiding properties of the diffusion membrane by adjusting the ratio of a large amount of organic diffusion particles and inorganic diffusion particles added in the coating solution, but the preparation process of the coating solution is complicated, and the diffusion membrane coating The amount of organic particles and inorganic particles in the coating is relatively large. If it is used to improve the hiding properties of various hardened films, protective films, composite films and other products, the amount of particles added in the coating is small, and the uniformity of dispersion is limited. some defects

Method used

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  • Optical thin film with high covering performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of coating solution:

[0037] 15.0g aliphatic urethane acrylate prepolymer (Sartomer, CN8000NS, functionality: 6), 25.0g 2-phenoxyethyl acrylate EM210 (Changxing Chemical, monofunctionality, viscosity: 10cps, molecular weight: 192g / mol), 2.4g photoinitiator 1137 (BASF), 0.5g leveling aid BYK307 (manufactured by BYK), 0.1g DMT-1605 (proficient in technology, 1μm, polydisperse), 28.5g butanone (boiling point: 79.6° C., specific volatilization rate: 380), 28.5 g of propylene glycol monomethyl ether (boiling point: 120° C., specific volatilization rate: 70) were placed in a stirring pot, and stirred evenly to obtain a coating liquid.

[0038] (2) Preparation of hardened layer:

[0039] Coat any side of a polycarbonate film with a thickness of 25 μm with the above-prepared coating liquid, and coat it on a transparent substrate by means of micro-gravure roll coating; Respectively set as follows: the temperature of the first-stage oven is 180°C, the temperatu...

Embodiment 2

[0041] (1) Preparation of coating solution:

[0042] 35.0g aliphatic urethane acrylate prepolymer (Changxing Chemical, DR-U591, functionality: 10), 5.0g trimethylolpropane triacrylate EM2280 (Changxing Chemical, bifunctionality, viscosity: 100cps, molecular weight: 296g / mol), 0.5g photoinitiator 184 (Tianjin Tianjiao Chemical), 0.5g leveling aid BYK307 (Bick Chemical), 0.4g MX-500 (Soyan Chemical, 5μm, monodisperse), 29.3g butanone ( Boiling point: 79.6° C., specific volatilization rate: 380), 29.3 g of butyl acetate (boiling point: 126° C., specific volatilization rate: 100) were placed in a stirring pot, and stirred evenly to obtain a coating liquid.

[0043] (2) Preparation of hardened layer:

[0044] Coat any side of a cellulose triacetate film with a thickness of 80 μm with the above-prepared coating solution, and coat it on a transparent substrate by means of micro-gravure roll coating; The temperature is set as follows: the temperature of the first-stage oven is 160°C...

Embodiment 3

[0046] (1) Preparation of coating solution:

[0047] 25.0g aliphatic urethane acrylate prepolymer (Sartomer, CN9013NS, functionality: 9), 7.0g tetrahydrofurfuryl acrylate EM214 (Changxing Chemical, monofunctionality, viscosity: 5cps, molecular weight: 154g / mol ), 2g photoinitiator 1137 (Tianjiao Chemical), 1g leveling aid Levaslip410 (Deqian Chemical), 5g ST-3 (proficient in technology, 3μm, polydisperse), 30.0g isopropanol (boiling point: 82 ° C, specific volatility Velocity: 170), 30.0 g of butyl acetate (boiling point: 126° C., specific volatilization rate: 100) were placed in a stirring pot, and stirred evenly to obtain a coating liquid.

[0048] (2) Preparation of hardened layer:

[0049] Coating the above-prepared coating solution on any side of a polyethylene terephthalate film with a thickness of 125 μm, and coating it on a transparent substrate by micro-gravure roll coating; then drying in a five-stage oven, The temperature of the five-stage oven is set as follows: ...

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Abstract

The invention provides an optical thin film with high covering performance. The optical thin film comprises a transparent supporting body and a hardening layer coating any one surface of the transparent supporting body, organic particles in the hardening layer are exposed out of the outer surface of the hardening layer by a height H1, and the height H1 is 1 / 4-5 / 6 of the average particle size D1 ofthe organic particles. By selectively using monomers, the organic particles and organic solvent in coating liquor of the hardening layer, under specific drying conditions of a drying oven, the particles on the surface of the prepared hardening layer float to improve the covering performance of the thin film, and short scratches, impurity points, dust and other flaws can be effectively prevented from occurring on the surface of the thin film. The prepared optical film can be widely applied to all the fields of all kinds of hardening films, protective films, composite films and others.

Description

technical field [0001] The invention relates to the technical field of films, in particular to a high-covering optical film. Background technique [0002] With the development of display technology, liquid crystal displays can be seen everywhere, and each liquid crystal display uses multiple optical thin film devices, so it is particularly important to optimize the various effects of optical thin films. However, the optical films used in the market have the defect of poor covering performance, and it is difficult to cover tiny defects such as dust and impurity spots between devices, especially some optical films with low haze. [0003] At present, there are different technical directions for improving the covering properties of optical films, among which the mainstream technology is to improve the composition of the coating surface of optical films. Chinese patent CN102759761A discloses a high-covering and high-brightness optical film, which includes a transparent substrate...

Claims

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Application Information

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IPC IPC(8): G02B1/14
CPCG02B1/14
Inventor 王巧刘玉磊李恒范义胜王辉王旭亮
Owner HEFEI LUCKY SCI & TECH IND