WO2022222169A1 - Light diffusion plate having high refractive index and synthesis method therefor - Google Patents

Light diffusion plate having high refractive index and synthesis method therefor Download PDF

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Publication number
WO2022222169A1
WO2022222169A1 PCT/CN2021/090405 CN2021090405W WO2022222169A1 WO 2022222169 A1 WO2022222169 A1 WO 2022222169A1 CN 2021090405 W CN2021090405 W CN 2021090405W WO 2022222169 A1 WO2022222169 A1 WO 2022222169A1
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layer
surface layer
refractive index
particles
light
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PCT/CN2021/090405
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French (fr)
Chinese (zh)
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张建林
张黎明
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苏州三鑫时代新材料股份有限公司
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method

Definitions

  • the invention relates to the field of optoelectronic materials, and more particularly, to a light diffusing plate with a high refractive index and a synthesis method thereof.
  • Light diffusers have been widely used in liquid crystal display, LED lighting and imaging systems to fully diffuse the incident light and achieve a softer and more uniform illumination effect.
  • the light diffusing plate is formed by adding a light diffusing agent to the raw material when producing a solid plate.
  • the diffusing agent is evenly distributed in the plate, so that when the light passes through the plate, it will reflect, refract and scatter when it encounters the particles of the diffusing agent, so that the light can pass through the plate evenly without exposing the light source.
  • Variation of surface light sources It is suitable for direct-lit LED TV backlight modules and LED lighting, with high brightness and high diffusivity, which can improve the even diffusion effect of the luminous distribution of the backlight source.
  • the light diffuser is a diffuser layer that uses PMMA/PC/PE/PS as the plastic substrate. When it encounters diffusing particles with different refractive indices, it will refract, reflect and scatter in multiple directions and angles.
  • the refractive index of the existing optical grade polystyrene is 1.51-1.52; the refractive index of the silicone particles is 1.42-1.45, the refractive index of the PMMA particles is 1.45-1.49, and the refractive index of the titanium dioxide particles is 1.42-1.45, can you find an existing low-cost material with a different refractive index from the above-mentioned materials, so that the light passes through different materials, and the angle of refraction is different, thereby changing the direction of the light, so that the light source passes through the light diffuser plate
  • the large increase in light transmittance has become a problem that needs to be solved at present.
  • the present invention proposes a high-refractive-index light diffusing plate and a method for synthesizing the same, which mainly include three layers, namely a first outer surface layer, a second outer surface layer and an intermediate layer, wherein the above-mentioned three
  • the base material of the layer diffuser is the same, and the functional particles in the first outer surface layer and the second outer surface layer are the same, which are used to enhance the special functions of the surface layer, such as anti-UV, antistatic, foaming and other functions;
  • the innovative point of the invention lies in that the first outer surface layer, the second outer surface layer and the middle layer are all added with hollow microspheres with a mass percentage of 1% to 2%, the main component of the hollow microspheres is silicone, and the The refractive index is 1.
  • the refraction angle of the light is enriched, the possibility of the refraction angle of the light passing through different materials is increased, and the direction of the light is changed more, so that the light source diffuses through the light
  • the light mixing effect is better when the board is used, and the light transmittance is greatly increased, which can meet most market needs and meet the needs and development of TFT-LCD products.
  • a high-refractive-index light diffusing plate comprising: a first outer surface layer, an intermediate layer, and a second outer surface layer, the first outer surface layer is divided into an upper surface and a lower surface, and the intermediate layer is divided into an upper surface and a lower surface.
  • the second outer surface layer is divided into an upper surface and a lower surface, the upper surface of the intermediate layer is combined with the lower surface of the first outer surface layer, and the lower surface of the intermediate layer is It is combined with the upper surface of the second outer surface layer;
  • the base materials of the first outer surface layer, the intermediate layer and the second outer surface layer are the same, and it is characterized in that: the first outer surface layer, the intermediate layer and the second outer surface Silicone particles, titanium dioxide particles, and hollow microspheres are added to the layers, and one or more of anti-UV agents and antistatic agents are added to the first outer surface layer and the second outer surface layer.
  • the main components of the hollow microspheres are: Silicone.
  • the proportion by weight of organosilicon particles, titanium dioxide particles, carbon dioxide particles and hollow microspheres in each layer of the first outer surface layer, the intermediate layer and the second outer surface layer is the same, respectively: 90% to 95% Optical grade polystyrene or PMMA particles, 1%-2% organic silicon particles, 1%-2% titanium dioxide particles, 1%-2% carbon dioxide particles, 1%-2% hollow microspheres.
  • the refractive index of optical grade polystyrene is 1.51-1.52; the refractive index of organic silicon particles is 1.42-1.45, the refractive index of PMMA particles is 1.45-1.49, the refractive index of titanium dioxide particles is 1.42-1.45, and the refractive index of hollow microspheres is 1.42-1.45.
  • the refractive index is 1.0-1.02.
  • the average particle size of the hollow microspheres is 1-20um, the aperture should not be too large nor too small, and the setting of the aperture range can make the light contact the hollow microspheres uniformly.
  • first outer surface layer and the second outer surface layer include one or more functional materials such as anti-UV and anti-static.
  • adding an anti-UV agent to the substrate can make the light diffusing plate have anti-UV effect, which increases the anti-yellowing effect of the product; adding an antistatic agent to the substrate can make the light diffusing plate have anti-static properties
  • the function of making the product is not easy to be contaminated with dust.
  • first outer layer and the second outer layer contain an anti-UV agent
  • the anti-UV agent is at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines.
  • first outer layer and the second outer layer contain an antistatic agent
  • the antistatic agent contains sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives. At least one of them is uniformly dispersed in the first outer layer and the second outer layer, wherein the antistatic agent accounts for 2% to 6% of the total mass of the first outer layer and the second outer layer.
  • the invention also discloses a method for synthesizing the high-refractive-index light diffusing plate, comprising the following steps:
  • Step of preparing the base material select optical grade polystyrene particles or PMMA particles as the base material;
  • Select from the prepared substrates select two feeding bins, namely the first feeding bin and the second feeding bin, and add 95% optical grade polystyrene, 1% silicone particles, The mixture of 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder is uniformly stirred and mixed and then put into the first screw granulator, and melted into a slurry;
  • a mixture of 95% optical grade polystyrene, 1% organosilicon particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder was added in the second feeding bin to be uniform After stirring and mixing, put it into the second screw granulator, and melt it into a slurry;
  • the powder includes one or more of a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubricating dispersing agent;
  • the slurry-like melt extruded from the head of the first screw granulator is transported to the upper and lower layers of the three-layer superimposed die through the distributor, and the slurry-like melt extruded from the head of the second screw granulator is melted.
  • the upper layer, middle layer, The thickness of the lower layer, the thickness of the upper layer, the middle layer and the lower layer of the three-layer stacking die can be adjusted twice by adjusting the gap of the three-layer stacking die.
  • the spit from the layer die forms the middle layer of the diffuser
  • the spit from the lower die forms the second outer surface of the diffuser
  • the first outer surface, the middle layer and the second outer surface of the diffuser are cooled and formed by three-roll rolling
  • the finished diffuser plate is formed.
  • the diffuser plate is conveyed forward through the conveyor belt, and is naturally cooled during the conveying process or cooled to room temperature by the cooling liquid, and then cut to the appropriate finished product size.
  • the granulation temperature in the twin-screw granulator is between 160 and 220 degrees, and the granulation pressure is between 4.5Mpa and 13.5Mpa.
  • the plate forming temperature in the extrusion forming machine is between 170 degrees and 230 degrees, and the plate forming pressure is between 4.5 Mpa and 13.5 Mpa.
  • the high haze, high transmittance light diffusing plate of the present invention uses simple materials, which are relatively easy to obtain raw materials, and the amount used is relatively small, so the raw material cost is relatively low.
  • the refractive index of the hollow microspheres of silicone in the intermediate layer in the present invention is 1.0-1.02, the refractive index of optical-grade polystyrene is 1.51-1.52, and the refractive index of optical-grade polystyrene is 1.51-1.52;
  • the refractive index of silicone particles is 1.42-1.45
  • the refractive index of PMMA particles is 1.45-1.49
  • the refractive index of titanium dioxide particles is 1.42-1.45.
  • Light passes through different materials, and the angle of refraction is different, thereby changing the direction of the light, making the light source
  • the light transmittance is greatly increased through the light diffuser, it can meet most of the market demands and meet the proliferating demands and development of the energy-saving industry.
  • FIG. 1 is a schematic structural diagram of a light diffusing plate with a high refractive index according to a specific embodiment.
  • FIG. 1 it is a schematic structural diagram of a light diffusing plate with a high refractive index.
  • a light diffusing plate with high refractive index which comprises: a first outer surface layer 1, an intermediate layer 2, a second outer surface layer 3, the first outer surface layer 1 is divided into an upper surface and a lower surface, the The intermediate layer 2 is divided into an upper surface and a lower surface, the second outer surface layer 3 is divided into an upper surface and a lower surface, the upper surface of the intermediate layer 2 is combined with the lower surface of the first outer surface layer 1, The lower surface of the intermediate layer 2 is combined with the upper surface of the second outer surface layer 3; the base materials of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3 are the same, and are characterized in that: The first outer surface layer 1, the middle layer 2 and the second outer surface layer 3 are all added with organic silicon particles, titanium dioxide particles, and hollow microspheres 4, and the first outer surface layer 1 and the second outer surface layer 3 are added with anti-UV agents. , one or more of antistatic agents, and the main component of the hollow microspheres 4 is organic silicon.
  • the organosilicon particles, titanium dioxide particles, carbon dioxide particles and hollow microspheres 4 in each layer of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3 have the same proportions by weight, respectively: 90% ⁇ 95% of optical grade polystyrene or PMMA particles, 1% to 2% of silicone particles, 1% to 2% of titanium dioxide particles, 1% to 2% of carbon dioxide particles, 1% to 2% of hollow microspheres4.
  • the refractive index of the optical grade polystyrene is 1.51; the refractive index of the organosilicon particles is 1.42, the refractive index of the PMMA particles is 1.45, the refractive index of the titanium dioxide particles is 1.42, and the refractive index of the hollow microspheres 4 is 1.0.
  • the average particle size of the hollow microspheres 4 is 1-20um, the aperture should not be too large nor too small, and the setting of the aperture range can make the light can contact the hollow microspheres 4 uniformly.
  • the first outer surface layer 1 and the second outer surface layer 3 contain one or more functional materials such as anti-UV and anti-static. Under normal circumstances, adding an anti-UV agent to the substrate can make the light diffusing plate have anti-UV effect, which increases the anti-yellowing effect of the product; adding an antistatic agent to the substrate can make the light diffusing plate have anti-static properties The function of making the product is not easy to be contaminated with dust.
  • the first outer layer and the second outer layer contain an anti-UV agent, and the anti-UV agent is at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines. and uniformly dispersed in the first outer layer and the second outer layer, wherein the anti-UV agent accounts for 3% to 5% of the total mass of the first outer layer and the second outer layer.
  • the first outer layer and the second outer layer contain an antistatic agent, and the antistatic agent is composed of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives. At least one of the first outer layer and the second outer layer is uniformly dispersed in the first outer layer and the second outer layer, wherein the antistatic agent accounts for 2% to 6% of the total mass of the first outer layer and the second outer layer.
  • the invention also discloses a method for synthesizing the high-refractive-index light diffusing plate, comprising the following steps:
  • Step of preparing the base material select optical grade polystyrene particles or PMMA particles as the base material;
  • Select from the prepared substrates select two feeding bins, namely the first feeding bin and the second feeding bin, and add 95% optical grade polystyrene, 1% silicone particles, The mixture of 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder is uniformly stirred and mixed and then put into the first screw granulator, and melted into a slurry;
  • a mixture of 95% optical grade polystyrene, 1% organosilicon particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder was added in the second feeding bin to be uniform After stirring and mixing, put it into the second screw granulator, and melt it into a slurry;
  • the powder includes one or more of a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubricating dispersing agent;
  • the slurry-like melt extruded from the head of the first screw granulator is transported to the upper and lower layers of the three-layer superimposed die through the distributor, and the slurry-like melt extruded from the head of the second screw granulator is melted.
  • the upper layer, middle layer, The thickness of the lower layer, the thickness of the upper layer, the middle layer and the lower layer of the three-layer stacking die can be adjusted twice by adjusting the gap of the three-layer stacking die.
  • the spit from the layer die forms the middle layer of the diffuser
  • the spit from the lower die forms the second outer surface of the diffuser
  • the first outer surface, the middle layer and the second outer surface of the diffuser are cooled and formed by three-roll rolling
  • the finished diffuser plate is formed.
  • the diffuser plate is conveyed forward through the conveyor belt, and is naturally cooled during the conveying process or cooled to room temperature by the cooling liquid, and then cut to the appropriate finished product size.
  • the granulation temperature in the twin-screw granulator is between 160 degrees and 220 degrees, and the granulation pressure is between 4.5Mpa and 13.5Mpa.
  • the plate forming temperature in the extrusion forming machine is between 170 degrees and 230 degrees, and the plate forming pressure is between 4.5 Mpa and 13.5 Mpa.
  • a light diffusing plate with high refractive index which comprises: a first outer surface layer 1, an intermediate layer 2, a second outer surface layer 3, the first outer surface layer 1 is divided into an upper surface and a lower surface, the The intermediate layer 2 is divided into an upper surface and a lower surface, the second outer surface layer 3 is divided into an upper surface and a lower surface, the upper surface of the intermediate layer 2 is combined with the lower surface of the first outer surface layer 1, The lower surface of the intermediate layer 2 is combined with the upper surface of the second outer surface layer 3; the base materials of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3 are the same, and are characterized in that: The first outer surface layer 1, the middle layer 2 and the second outer surface layer 3 are all added with organic silicon particles, titanium dioxide particles, and hollow microspheres 4, and the first outer surface layer 1 and the second outer surface layer 3 are added with anti-UV agents. , one or more of antistatic agents, and the main component of the hollow microspheres 4 is organic silicon.
  • optical grade polystyrene organosilicon particles, PMMA particles, titanium dioxide particles, carbon dioxide particles and hollow microspheres 4 in each layer of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3
  • the proportions are the same, namely: 90% optical grade polystyrene, 2% silicone particles, 1% to 2% PMMA particles, 2% titanium dioxide particles, 2% carbon dioxide particles, and 2% hollow microspheres 4 .
  • the refractive index of optical grade polystyrene is 1.52; the refractive index of silicone particles is 1.45, the refractive index of PMMA particles is 1.49, the refractive index of titanium dioxide particles is 1.45, and the refractive index of hollow microspheres 4 is 1.02.
  • the average particle size of the hollow microspheres 4 is 1-20um, the aperture should not be too large nor too small, and the setting of the aperture range can make the light can contact the hollow microspheres 4 uniformly.
  • the first outer surface layer 1 and the second outer surface layer 3 contain one or more functional materials such as anti-UV and anti-static. Under normal circumstances, adding an anti-UV agent to the substrate can make the light diffusing plate have anti-UV effect, which increases the anti-yellowing effect of the product; adding an antistatic agent to the substrate can make the light diffusing plate have anti-static properties The function of making the product is not easy to be contaminated with dust.
  • the first outer layer and the second outer layer contain an anti-UV agent, and the anti-UV agent is at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines. and uniformly dispersed in the first outer layer and the second outer layer, wherein the anti-UV agent accounts for 3% to 5% of the total mass of the first outer layer and the second outer layer.
  • the first outer layer and the second outer layer contain an antistatic agent, and the antistatic agent is composed of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives. At least one of the first outer layer and the second outer layer is uniformly dispersed in the first outer layer and the second outer layer, wherein the antistatic agent accounts for 2% to 6% of the total mass of the first outer layer and the second outer layer.
  • the invention also discloses a method for synthesizing the high-refractive-index light diffusing plate, comprising the following steps:
  • Step of preparing the base material select optical grade polystyrene particles or PMMA particles as the base material;
  • Select from the prepared substrates select two feeding bins, namely the first feeding bin and the second feeding bin, and add 95% optical grade polystyrene, 1% silicone particles, The mixture of 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder is uniformly stirred and mixed and then put into the first screw granulator, and melted into a slurry;
  • a mixture of 95% optical grade polystyrene, 1% organosilicon particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder was added in the second feeding bin to be uniform After stirring and mixing, put it into the second screw granulator, and melt it into a slurry;
  • the powder includes one or more of a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubricating dispersing agent;
  • the slurry-like melt extruded from the head of the first screw granulator is transported to the upper and lower layers of the three-layer superimposed die through the distributor, and the slurry-like melt extruded from the head of the second screw granulator is melted.
  • the upper layer, middle layer, The thickness of the lower layer, the thickness of the upper layer, the middle layer and the lower layer of the three-layer stacking die can be adjusted twice by adjusting the gap of the three-layer stacking die.
  • the spit from the layer die forms the middle layer of the diffuser
  • the spit from the lower die forms the second outer surface of the diffuser
  • the first outer surface, the middle layer and the second outer surface of the diffuser are cooled and formed by three-roll rolling
  • the finished diffuser plate is formed.
  • the diffuser plate is conveyed forward through the conveyor belt, and is naturally cooled during the conveying process or cooled to room temperature by the cooling liquid, and then cut to the appropriate finished product size.
  • the granulation temperature in the twin-screw granulator is between 160 degrees and 220 degrees, and the granulation pressure is between 4.5Mpa and 13.5Mpa.
  • the plate forming temperature in the extrusion forming machine is between 170 degrees and 230 degrees, and the plate forming pressure is between 4.5 Mpa and 13.5 Mpa.
  • the high haze, high transmittance light diffusing plate of the present invention uses simple materials, which are relatively easy to obtain raw materials, and the amount used is relatively small, so the raw material cost is relatively low.
  • the refractive index of the hollow microspheres 4 of silicone in the intermediate layer 2 in the present invention is 1.02
  • the refractive index of optical grade polystyrene is 1.52
  • the refractive index of optical grade polystyrene is 1.52
  • the refractive index is 1.45
  • the refractive index of PMMA particles is 1.49
  • the refractive index of titanium dioxide particles is 1.45.
  • the refraction angle of light is enriched and the refraction angle of light passing through different materials is increased. It is possible to change the direction of the light more, so that when the light source passes through the light diffusion plate, the light mixing effect is better, and the light transmittance is greatly increased, which can meet most market demands and meet the needs and development of TFT-LCD products.

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  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

The present invention provides a light diffusion plate having a high refractive index and a synthesis method therefor. The plate mainly comprises three layers: a first outer surface layer, a second outer surface layer and an intermediate layer, the base material of the foregoing three layers of the light diffusion plate are the same, and functional particles in the first outer surface layer and second outer surface layer are the same and are used to improve special functions of the surface layers, functions such as anti-UV, anti-static, and foaming. The innovative point of the present invention is that a hollow microsphere having a mass percentage of 1%-2% is added to the first outer surface layer, the second outer surface layer and the intermediate layer, the main component of the hollow microspheres is organic silicone, and the refractive index of the hollow microspheres is 1. By introducing a light diffusion agent having a low refractive index angle, the refractive angle of light is increased and the possibility of light passing through the refractive angle of different materials is increased, so the more changed direction of light enables a better light mixing effect when a light source passes through a light diffusion plate, light transmittance is greatly increased, the majority of market requirements can be satisfied, and requirements and development of TFT-LCD products are satisfied.

Description

一种高折射率的光扩散板及其合成方法A kind of light diffusing plate with high refractive index and its synthesis method 技术领域technical field
本发明涉及光电材料领域，较为具体的，涉及一种高折射率的光扩散板及其合成方法。The invention relates to the field of optoelectronic materials, and more particularly, to a light diffusing plate with a high refractive index and a synthesis method thereof.
背景技术Background technique
光扩散板目前已经广泛应用在液晶显示、LED照明以及成像等***中，使入射光充分散射，实现更柔和、均匀的照射效果。光扩散板是在生产实心板的时候，在原料中添加光扩散剂而形成的。扩散剂通过均匀分布在板材内，使得光线经过板材时，碰到扩散剂颗粒发生反射、折射、散射的效果，从而是光线能够均匀得透过板材但又不会露出光源，达到从点光源到面光源的变化。适用于直下式LED电视机背光模组、LED照明，具有高辉度、高扩散性，提高背光源的发光分布均匀的扩散效果。Light diffusers have been widely used in liquid crystal display, LED lighting and imaging systems to fully diffuse the incident light and achieve a softer and more uniform illumination effect. The light diffusing plate is formed by adding a light diffusing agent to the raw material when producing a solid plate. The diffusing agent is evenly distributed in the plate, so that when the light passes through the plate, it will reflect, refract and scatter when it encounters the particles of the diffusing agent, so that the light can pass through the plate evenly without exposing the light source. Variation of surface light sources. It is suitable for direct-lit LED TV backlight modules and LED lighting, with high brightness and high diffusivity, which can improve the even diffusion effect of the luminous distribution of the backlight source.
光扩散板是光线通过以PMMA/PC/PE/PS等为塑料基材的扩散层，遇到与其折射率相异的扩散粒子时，会发生多方向、多角度的折射、反射以及散射现象，以此获得光学扩散效果，现有的光学级聚苯乙烯的折射率为1.51～1.52；有机硅粒子的折射率为1.42-1.45，PMMA粒子的折射率为1.45-1.49，二氧化钛粒子的折射率为1.42-1.45，能否找到一种现有的成本低的材料且与上述材料的折射率不同，从而使得光通过不同的材料，折射的角度不同，从而改变光的方向，使得光源通过光扩散板时透光率大大增加成了当下需要解决的问题。The light diffuser is a diffuser layer that uses PMMA/PC/PE/PS as the plastic substrate. When it encounters diffusing particles with different refractive indices, it will refract, reflect and scatter in multiple directions and angles. In order to obtain the optical diffusion effect, the refractive index of the existing optical grade polystyrene is 1.51-1.52; the refractive index of the silicone particles is 1.42-1.45, the refractive index of the PMMA particles is 1.45-1.49, and the refractive index of the titanium dioxide particles is 1.42-1.45, can you find an existing low-cost material with a different refractive index from the above-mentioned materials, so that the light passes through different materials, and the angle of refraction is different, thereby changing the direction of the light, so that the light source passes through the light diffuser plate The large increase in light transmittance has become a problem that needs to be solved at present.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明提出一种高折射率的光扩散板及其合成方法，其主要包括三层，分别为第一外表面层、第二外表面层和中间层，其中以上所述的三层扩散板的基材相同，而第一外表面层和第二外表面层中的功能型微粒相同，其用来提升表面层的特殊功能，例如抗UV、抗静电、发泡等功能；本发明的创新点在于在第一外表面层、第二外表面层和中间层中均加入质量百分 比为1％-2％的中空微球，中空微球的主要成分为有机硅，中空微球的折射率为1，通过引入低折射率角度的光扩散剂，丰富了光的折射角度，增加了光通过不同的材料的折射角度的可能性，更多的改变光的方向，使得光源通过光扩散板时混光效果更好，透光率大大增加，可以满足大部分的市场需求，符合TFT-LCD产品的需求和发展。In view of this, the present invention proposes a high-refractive-index light diffusing plate and a method for synthesizing the same, which mainly include three layers, namely a first outer surface layer, a second outer surface layer and an intermediate layer, wherein the above-mentioned three The base material of the layer diffuser is the same, and the functional particles in the first outer surface layer and the second outer surface layer are the same, which are used to enhance the special functions of the surface layer, such as anti-UV, antistatic, foaming and other functions; The innovative point of the invention lies in that the first outer surface layer, the second outer surface layer and the middle layer are all added with hollow microspheres with a mass percentage of 1% to 2%, the main component of the hollow microspheres is silicone, and the The refractive index is 1. By introducing a light diffusing agent with a low refractive index angle, the refraction angle of the light is enriched, the possibility of the refraction angle of the light passing through different materials is increased, and the direction of the light is changed more, so that the light source diffuses through the light The light mixing effect is better when the board is used, and the light transmittance is greatly increased, which can meet most market needs and meet the needs and development of TFT-LCD products.
一种高折射率的光扩散板，其包括：第一外表面层、中间层、第二外表面层，所述的第一外表面层分为上表面和下表面，所述的中间层分为上表面和下表面，所述的第二外表面层分为上表面和下表面，所述的中间层的上表面与第一外表面层的下表面结合，所述的中间层的下表面与第二外表面层的上表面结合；所述的第一外表面层、中间层和第二外表面层的基材相同，其特征在于：第一外表面层、中间层和第二外表面层均添加了有机硅粒子、二氧化钛粒子、中空微球，第一外表面层和第二外表面层中添加抗UV剂、抗静电剂中的一种或多种，中空微球的主要成分为有机硅。A high-refractive-index light diffusing plate, comprising: a first outer surface layer, an intermediate layer, and a second outer surface layer, the first outer surface layer is divided into an upper surface and a lower surface, and the intermediate layer is divided into an upper surface and a lower surface. For the upper surface and the lower surface, the second outer surface layer is divided into an upper surface and a lower surface, the upper surface of the intermediate layer is combined with the lower surface of the first outer surface layer, and the lower surface of the intermediate layer is It is combined with the upper surface of the second outer surface layer; the base materials of the first outer surface layer, the intermediate layer and the second outer surface layer are the same, and it is characterized in that: the first outer surface layer, the intermediate layer and the second outer surface Silicone particles, titanium dioxide particles, and hollow microspheres are added to the layers, and one or more of anti-UV agents and antistatic agents are added to the first outer surface layer and the second outer surface layer. The main components of the hollow microspheres are: Silicone.
进一步的，第一外表面层、中间层和第二外表面层每层中的有机硅粒子、二氧化钛粒子、二氧化碳粒子和中空微球的重量份数配比相同，分别为：90％～95％光学级聚苯乙烯或者PMMA粒子,1％～2％有机硅粒子，1％～2％二氧化钛粒子，1％～2％二氧化碳粒子，1％～2％中空微球。Further, the proportion by weight of organosilicon particles, titanium dioxide particles, carbon dioxide particles and hollow microspheres in each layer of the first outer surface layer, the intermediate layer and the second outer surface layer is the same, respectively: 90% to 95% Optical grade polystyrene or PMMA particles, 1%-2% organic silicon particles, 1%-2% titanium dioxide particles, 1%-2% carbon dioxide particles, 1%-2% hollow microspheres.
进一步的，光学级聚苯乙烯的折射率为1.51～1.52；有机硅粒子的折射率为1.42-1.45，PMMA粒子的折射率为1.45-1.49，二氧化钛粒子的折射率为1.42-1.45，中空微球的折射率为1.0-1.02。Further, the refractive index of optical grade polystyrene is 1.51-1.52; the refractive index of organic silicon particles is 1.42-1.45, the refractive index of PMMA particles is 1.45-1.49, the refractive index of titanium dioxide particles is 1.42-1.45, and the refractive index of hollow microspheres is 1.42-1.45. The refractive index is 1.0-1.02.
进一步的，中空微球的平均粒径为1～20um，孔径不宜过大也不宜过小，通过孔径范围的设置可以使得光可以均匀的与中空微球接触。Further, the average particle size of the hollow microspheres is 1-20um, the aperture should not be too large nor too small, and the setting of the aperture range can make the light contact the hollow microspheres uniformly.
进一步的，第一外表面层和第二外表面层中包含具有抗UV、抗静电等功能材料中的一种或多种。通常情况下，在基材中加入抗UV剂，可以使得光扩散板具有抗UV的效果，使得产品抗黄化的效果增加；在基材中加入抗静电剂，可以使得光扩散板具有抗静电的作用，使得产品上不易沾染灰尘。Further, the first outer surface layer and the second outer surface layer include one or more functional materials such as anti-UV and anti-static. Under normal circumstances, adding an anti-UV agent to the substrate can make the light diffusing plate have anti-UV effect, which increases the anti-yellowing effect of the product; adding an antistatic agent to the substrate can make the light diffusing plate have anti-static properties The function of making the product is not easy to be contaminated with dust.
进一步的，第一外表层和第二外表层中含有抗UV剂，所述的抗UV剂为含苯甲酸类、二苯甲酮类、苯并***类、或部分受阻胺类中的至少一种，且均匀分散在第一外表层和第二外表层中，其中抗UV剂占第一外表层和第二外表层总质量的3％～5％。Further, the first outer layer and the second outer layer contain an anti-UV agent, and the anti-UV agent is at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines. One, and is uniformly dispersed in the first outer layer and the second outer layer, wherein the anti-UV agent accounts for 3% to 5% of the total mass of the first outer layer and the second outer layer.
进一步的，第一外表层和第二外表层中含有抗静电剂，所述的抗静电剂为包含硫酸衍生物、磷酸衍生物、胺类、季铵盐、咪唑类以及环氧乙烷衍生物中的至少一种，且均匀分散在第一外表层和第二外表层中，其中抗静电剂占第一外表层和第二外表层总质量的2％～6％。Further, the first outer layer and the second outer layer contain an antistatic agent, and the antistatic agent contains sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives. At least one of them is uniformly dispersed in the first outer layer and the second outer layer, wherein the antistatic agent accounts for 2% to 6% of the total mass of the first outer layer and the second outer layer.
本发明还公开了所述的高折射率的光扩散板的合成方法，包括如下步骤：The invention also discloses a method for synthesizing the high-refractive-index light diffusing plate, comprising the following steps:
(1)准备基材步骤：选用光学级聚苯乙烯颗粒或者PMMA粒子作为基材；(1) Step of preparing the base material: select optical grade polystyrene particles or PMMA particles as the base material;
(2)制作光学母粒步骤：(2) Steps of making optical masterbatch:
从准备的基材中选取：选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第一螺杆造粒机中，将其融化为浆状；Select from the prepared substrates: select two feeding bins, namely the first feeding bin and the second feeding bin, and add 95% optical grade polystyrene, 1% silicone particles, The mixture of 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder is uniformly stirred and mixed and then put into the first screw granulator, and melted into a slurry;
在第二加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第二螺杆造粒机中，将其融化为浆状；A mixture of 95% optical grade polystyrene, 1% organosilicon particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder was added in the second feeding bin to be uniform After stirring and mixing, put it into the second screw granulator, and melt it into a slurry;
所述粉剂包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂中的一种或多种；The powder includes one or more of a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubricating dispersing agent;
(3)挤出成型步骤：(3) Extrusion molding steps:
将第一螺杆造粒机的机头挤出的浆状熔融物通过分配器后分别输送给三层叠加模头的上层和下层，将第二螺杆造粒机的机头挤出的浆状熔融物输送给三层叠加模头的中间层，通过控制第一螺杆造粒机和第二螺杆造粒机的挤出速率和分配器的分配比例可以一次调节三层叠加模头上层、中间层、下层厚度，通过调节三层叠加摸头的间隙可以二次调节三层叠加摸头上层、中间层、下层厚度，三层叠加模头的上层模头的吐出物形成扩散板的第一外表面层，中间层模头的吐出物形成扩散板的中间层，下层模头的吐出物形成扩散板的第二外表面，扩散板的第一外表面、中间层和第二外表面通过三辊延压冷却成型形成扩散板成品。The slurry-like melt extruded from the head of the first screw granulator is transported to the upper and lower layers of the three-layer superimposed die through the distributor, and the slurry-like melt extruded from the head of the second screw granulator is melted. By controlling the extrusion rate of the first screw granulator and the second screw granulator and the distribution ratio of the distributor, the upper layer, middle layer, The thickness of the lower layer, the thickness of the upper layer, the middle layer and the lower layer of the three-layer stacking die can be adjusted twice by adjusting the gap of the three-layer stacking die. The spit from the layer die forms the middle layer of the diffuser, the spit from the lower die forms the second outer surface of the diffuser, and the first outer surface, the middle layer and the second outer surface of the diffuser are cooled and formed by three-roll rolling The finished diffuser plate is formed.
(4)冷却裁切步骤：(4) Cooling and cutting steps:
经过三辊延压后的扩散板通过传送带向前输送，在输送过程中自然冷却或通过冷却液进行冷却至室温后，裁切至适当的成品尺寸。After the three-roller rolling, the diffuser plate is conveyed forward through the conveyor belt, and is naturally cooled during the conveying process or cooled to room temperature by the cooling liquid, and then cut to the appropriate finished product size.
进一步的，所述制作光学母粒步骤中，所述双螺杆造粒机中的造粒温度 在160度至220度之间，造粒压力在4.5Mpa至13.5Mpa之间。Further, in the step of making optical master batches, the granulation temperature in the twin-screw granulator is between 160 and 220 degrees, and the granulation pressure is between 4.5Mpa and 13.5Mpa.
进一步的，挤出成型步骤中，所述挤出成型机中的板材成型温度在170度至230度之间，板材成型压力在4.5Mpa至13.5Mpa之间。Further, in the extrusion forming step, the plate forming temperature in the extrusion forming machine is between 170 degrees and 230 degrees, and the plate forming pressure is between 4.5 Mpa and 13.5 Mpa.
与现有技术相比，本发明的高雾度、高透光率的光扩散板使用的材料简单，都是较为容易获得的原料，且用量相对较少，故原材料成本相对较低。另外，由于本发明中中间层中有机硅的中空微球的折射率为1.0-1.02，光学级聚苯乙烯的的折射率为1.51～1.52，光学级聚苯乙烯的折射率为1.51～1.52；有机硅粒子的折射率为1.42-1.45，PMMA粒子的折射率为1.45-1.49，二氧化钛粒子的折射率为1.42-1.45，光通过不同的材料，折射的角度不同，从而改变光的方向，使得光源通过光扩散板时透光率大大增加可以满足大部分的市场需求，符合节能产业的增生需求和发展。Compared with the prior art, the high haze, high transmittance light diffusing plate of the present invention uses simple materials, which are relatively easy to obtain raw materials, and the amount used is relatively small, so the raw material cost is relatively low. In addition, since the refractive index of the hollow microspheres of silicone in the intermediate layer in the present invention is 1.0-1.02, the refractive index of optical-grade polystyrene is 1.51-1.52, and the refractive index of optical-grade polystyrene is 1.51-1.52; The refractive index of silicone particles is 1.42-1.45, the refractive index of PMMA particles is 1.45-1.49, and the refractive index of titanium dioxide particles is 1.42-1.45. Light passes through different materials, and the angle of refraction is different, thereby changing the direction of the light, making the light source When the light transmittance is greatly increased through the light diffuser, it can meet most of the market demands and meet the proliferating demands and development of the energy-saving industry.
附图说明Description of drawings
图1为具体实施方式的高折射率的光扩散板的结构示意图。FIG. 1 is a schematic structural diagram of a light diffusing plate with a high refractive index according to a specific embodiment.
主要元器件说明:Description of main components:
第一外表面层first outer surface layer 11
中间层middle layer 22
第二外表面层second outer surface layer 33
中空微球 hollow microspheres 44
如下具体实施方式将结合上述附图进一步说明本发明。The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.
具体实施方式Detailed ways
如图1所示，为高折射率的光扩散板的结构示意图。As shown in FIG. 1 , it is a schematic structural diagram of a light diffusing plate with a high refractive index.
具体实施例1Specific Example 1
一种高折射率的光扩散板，其包括：第一外表面层1、中间层2、第二外表面层3，所述的第一外表面层1分为上表面和下表面，所述的中间层2分为上表面和下表面，所述的第二外表面层3分为上表面和下表面，所述的中间层2的上表面与第一外表面层1的下表面结合，所述的中间层2的下表面与第二外表面层3的上表面结合；所述的第一外表面层1、中间层2和第二外表面层3的基材相同，其特征在于：第一外表面层1、中间层2和第二外表面层3均添加了有机硅粒子、二氧化钛粒子、中空微球4，第一外表面层1 和第二外表面层3中添加抗UV剂、抗静电剂中的一种或多种，中空微球4的主要成分为有机硅。A light diffusing plate with high refractive index, which comprises: a first outer surface layer 1, an intermediate layer 2, a second outer surface layer 3, the first outer surface layer 1 is divided into an upper surface and a lower surface, the The intermediate layer 2 is divided into an upper surface and a lower surface, the second outer surface layer 3 is divided into an upper surface and a lower surface, the upper surface of the intermediate layer 2 is combined with the lower surface of the first outer surface layer 1, The lower surface of the intermediate layer 2 is combined with the upper surface of the second outer surface layer 3; the base materials of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3 are the same, and are characterized in that: The first outer surface layer 1, the middle layer 2 and the second outer surface layer 3 are all added with organic silicon particles, titanium dioxide particles, and hollow microspheres 4, and the first outer surface layer 1 and the second outer surface layer 3 are added with anti-UV agents. , one or more of antistatic agents, and the main component of the hollow microspheres 4 is organic silicon.
所述第一外表面层1、中间层2和第二外表面层3每层中的有机硅粒子、二氧化钛粒子、二氧化碳粒子和中空微球4的重量份数配比相同，分别为：90％～95％光学级聚苯乙烯或者PMMA粒子,1％～2％有机硅粒子，1％～2％二氧化钛粒子，1％～2％二氧化碳粒子，1％～2％中空微球4。The organosilicon particles, titanium dioxide particles, carbon dioxide particles and hollow microspheres 4 in each layer of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3 have the same proportions by weight, respectively: 90% ～95% of optical grade polystyrene or PMMA particles, 1% to 2% of silicone particles, 1% to 2% of titanium dioxide particles, 1% to 2% of carbon dioxide particles, 1% to 2% of hollow microspheres4.
所述光学级聚苯乙烯的折射率为1.51；有机硅粒子的折射率为1.42，PMMA粒子的折射率为1.45，二氧化钛粒子的折射率为1.42，中空微球4的折射率为1.0。The refractive index of the optical grade polystyrene is 1.51; the refractive index of the organosilicon particles is 1.42, the refractive index of the PMMA particles is 1.45, the refractive index of the titanium dioxide particles is 1.42, and the refractive index of the hollow microspheres 4 is 1.0.
所述中空微球4的平均粒径为1～20um，孔径不宜过大也不宜过小，通过孔径范围的设置可以使得光可以均匀的与中空微球4接触。The average particle size of the hollow microspheres 4 is 1-20um, the aperture should not be too large nor too small, and the setting of the aperture range can make the light can contact the hollow microspheres 4 uniformly.
所述第一外表面层1和第二外表面层3中包含具有抗UV、抗静电等功能材料中的一种或多种。通常情况下，在基材中加入抗UV剂，可以使得光扩散板具有抗UV的效果，使得产品抗黄化的效果增加；在基材中加入抗静电剂，可以使得光扩散板具有抗静电的作用，使得产品上不易沾染灰尘。The first outer surface layer 1 and the second outer surface layer 3 contain one or more functional materials such as anti-UV and anti-static. Under normal circumstances, adding an anti-UV agent to the substrate can make the light diffusing plate have anti-UV effect, which increases the anti-yellowing effect of the product; adding an antistatic agent to the substrate can make the light diffusing plate have anti-static properties The function of making the product is not easy to be contaminated with dust.
所述第一外表层和第二外表层中含有抗UV剂，所述的抗UV剂为含苯甲酸类、二苯甲酮类、苯并***类、或部分受阻胺类中的至少一种，且均匀分散在第一外表层和第二外表层中，其中抗UV剂占第一外表层和第二外表层总质量的3％～5％。The first outer layer and the second outer layer contain an anti-UV agent, and the anti-UV agent is at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines. and uniformly dispersed in the first outer layer and the second outer layer, wherein the anti-UV agent accounts for 3% to 5% of the total mass of the first outer layer and the second outer layer.
所述第一外表层和第二外表层中含有抗静电剂，所述的抗静电剂为包含硫酸衍生物、磷酸衍生物、胺类、季铵盐、咪唑类以及环氧乙烷衍生物中的至少一种，且均匀分散在第一外表层和第二外表层中，其中抗静电剂占第一外表层和第二外表层总质量的2％～6％。The first outer layer and the second outer layer contain an antistatic agent, and the antistatic agent is composed of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives. At least one of the first outer layer and the second outer layer is uniformly dispersed in the first outer layer and the second outer layer, wherein the antistatic agent accounts for 2% to 6% of the total mass of the first outer layer and the second outer layer.
本发明还公开了所述的高折射率的光扩散板的合成方法，包括如下步骤：The invention also discloses a method for synthesizing the high-refractive-index light diffusing plate, comprising the following steps:
(1)准备基材步骤：选用光学级聚苯乙烯颗粒或者PMMA粒子作为基材；(1) Step of preparing the base material: select optical grade polystyrene particles or PMMA particles as the base material;
(2)制作光学母粒步骤：(2) Steps of making optical masterbatch:
从准备的基材中选取：选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第一螺杆造粒机中，将其融化为浆状；Select from the prepared substrates: select two feeding bins, namely the first feeding bin and the second feeding bin, and add 95% optical grade polystyrene, 1% silicone particles, The mixture of 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder is uniformly stirred and mixed and then put into the first screw granulator, and melted into a slurry;
在第二加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第二螺杆造粒机中，将其融化为浆状；A mixture of 95% optical grade polystyrene, 1% organosilicon particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder was added in the second feeding bin to be uniform After stirring and mixing, put it into the second screw granulator, and melt it into a slurry;
所述粉剂包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂中的一种或多种；The powder includes one or more of a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubricating dispersing agent;
(3)挤出成型步骤：(3) Extrusion molding steps:
将第一螺杆造粒机的机头挤出的浆状熔融物通过分配器后分别输送给三层叠加模头的上层和下层，将第二螺杆造粒机的机头挤出的浆状熔融物输送给三层叠加模头的中间层，通过控制第一螺杆造粒机和第二螺杆造粒机的挤出速率和分配器的分配比例可以一次调节三层叠加模头上层、中间层、下层厚度，通过调节三层叠加摸头的间隙可以二次调节三层叠加摸头上层、中间层、下层厚度，三层叠加模头的上层模头的吐出物形成扩散板的第一外表面层，中间层模头的吐出物形成扩散板的中间层，下层模头的吐出物形成扩散板的第二外表面，扩散板的第一外表面、中间层和第二外表面通过三辊延压冷却成型形成扩散板成品。The slurry-like melt extruded from the head of the first screw granulator is transported to the upper and lower layers of the three-layer superimposed die through the distributor, and the slurry-like melt extruded from the head of the second screw granulator is melted. By controlling the extrusion rate of the first screw granulator and the second screw granulator and the distribution ratio of the distributor, the upper layer, middle layer, The thickness of the lower layer, the thickness of the upper layer, the middle layer and the lower layer of the three-layer stacking die can be adjusted twice by adjusting the gap of the three-layer stacking die. The spit from the layer die forms the middle layer of the diffuser, the spit from the lower die forms the second outer surface of the diffuser, and the first outer surface, the middle layer and the second outer surface of the diffuser are cooled and formed by three-roll rolling The finished diffuser plate is formed.
(4)冷却裁切步骤：(4) Cooling and cutting steps:
经过三辊延压后的扩散板通过传送带向前输送，在输送过程中自然冷却或通过冷却液进行冷却至室温后，裁切至适当的成品尺寸。After the three-roller rolling, the diffuser plate is conveyed forward through the conveyor belt, and is naturally cooled during the conveying process or cooled to room temperature by the cooling liquid, and then cut to the appropriate finished product size.
所述制作光学母粒步骤中，所述双螺杆造粒机中的造粒温度在160度至220度之间，造粒压力在4.5Mpa至13.5Mpa之间。In the step of making the optical master batch, the granulation temperature in the twin-screw granulator is between 160 degrees and 220 degrees, and the granulation pressure is between 4.5Mpa and 13.5Mpa.
所述挤出成型步骤中，所述挤出成型机中的板材成型温度在170度至230度之间，板材成型压力在4.5Mpa至13.5Mpa之间。In the extrusion forming step, the plate forming temperature in the extrusion forming machine is between 170 degrees and 230 degrees, and the plate forming pressure is between 4.5 Mpa and 13.5 Mpa.
具体实施例2Specific embodiment 2
一种高折射率的光扩散板，其包括：第一外表面层1、中间层2、第二外表面层3，所述的第一外表面层1分为上表面和下表面，所述的中间层2分为上表面和下表面，所述的第二外表面层3分为上表面和下表面，所述的中间层2的上表面与第一外表面层1的下表面结合，所述的中间层2的下表面与第二外表面层3的上表面结合；所述的第一外表面层1、中间层2和第二外表面层3的基材相同，其特征在于：第一外表面层1、中间层2和第二外表面层3均添加了有机硅粒子、二氧化钛粒子、中空微球4，第一外表面层1 和第二外表面层3中添加抗UV剂、抗静电剂中的一种或多种，中空微球4的主要成分为有机硅。A light diffusing plate with high refractive index, which comprises: a first outer surface layer 1, an intermediate layer 2, a second outer surface layer 3, the first outer surface layer 1 is divided into an upper surface and a lower surface, the The intermediate layer 2 is divided into an upper surface and a lower surface, the second outer surface layer 3 is divided into an upper surface and a lower surface, the upper surface of the intermediate layer 2 is combined with the lower surface of the first outer surface layer 1, The lower surface of the intermediate layer 2 is combined with the upper surface of the second outer surface layer 3; the base materials of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3 are the same, and are characterized in that: The first outer surface layer 1, the middle layer 2 and the second outer surface layer 3 are all added with organic silicon particles, titanium dioxide particles, and hollow microspheres 4, and the first outer surface layer 1 and the second outer surface layer 3 are added with anti-UV agents. , one or more of antistatic agents, and the main component of the hollow microspheres 4 is organic silicon.
所述第一外表面层1、中间层2和第二外表面层3每层中的光学级聚苯乙烯、有机硅粒子、PMMA粒子、二氧化钛粒子、二氧化碳粒子和中空微球4的重量份数配比相同，分别为：90％光学级聚苯乙烯,2％有机硅粒子，1％～2％PMMA粒子，2％二氧化钛粒子，2％二氧化碳粒子，2％中空微球4。The parts by weight of optical grade polystyrene, organosilicon particles, PMMA particles, titanium dioxide particles, carbon dioxide particles and hollow microspheres 4 in each layer of the first outer surface layer 1, the intermediate layer 2 and the second outer surface layer 3 The proportions are the same, namely: 90% optical grade polystyrene, 2% silicone particles, 1% to 2% PMMA particles, 2% titanium dioxide particles, 2% carbon dioxide particles, and 2% hollow microspheres 4 .
进一步的，光学级聚苯乙烯的折射率为1.52；有机硅粒子的折射率为1.45，PMMA粒子的折射率为1.49，二氧化钛粒子的折射率为1.45，中空微球4的折射率为1.02。Further, the refractive index of optical grade polystyrene is 1.52; the refractive index of silicone particles is 1.45, the refractive index of PMMA particles is 1.49, the refractive index of titanium dioxide particles is 1.45, and the refractive index of hollow microspheres 4 is 1.02.
所述中空微球4的平均粒径为1～20um，孔径不宜过大也不宜过小，通过孔径范围的设置可以使得光可以均匀的与中空微球4接触。The average particle size of the hollow microspheres 4 is 1-20um, the aperture should not be too large nor too small, and the setting of the aperture range can make the light can contact the hollow microspheres 4 uniformly.
所述第一外表面层1和第二外表面层3中包含具有抗UV、抗静电等功能材料中的一种或多种。通常情况下，在基材中加入抗UV剂，可以使得光扩散板具有抗UV的效果，使得产品抗黄化的效果增加；在基材中加入抗静电剂，可以使得光扩散板具有抗静电的作用，使得产品上不易沾染灰尘。The first outer surface layer 1 and the second outer surface layer 3 contain one or more functional materials such as anti-UV and anti-static. Under normal circumstances, adding an anti-UV agent to the substrate can make the light diffusing plate have anti-UV effect, which increases the anti-yellowing effect of the product; adding an antistatic agent to the substrate can make the light diffusing plate have anti-static properties The function of making the product is not easy to be contaminated with dust.
所述第一外表层和第二外表层中含有抗UV剂，所述的抗UV剂为含苯甲酸类、二苯甲酮类、苯并***类、或部分受阻胺类中的至少一种，且均匀分散在第一外表层和第二外表层中，其中抗UV剂占第一外表层和第二外表层总质量的3％～5％。The first outer layer and the second outer layer contain an anti-UV agent, and the anti-UV agent is at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines. and uniformly dispersed in the first outer layer and the second outer layer, wherein the anti-UV agent accounts for 3% to 5% of the total mass of the first outer layer and the second outer layer.
所述第一外表层和第二外表层中含有抗静电剂，所述的抗静电剂为包含硫酸衍生物、磷酸衍生物、胺类、季铵盐、咪唑类以及环氧乙烷衍生物中的至少一种，且均匀分散在第一外表层和第二外表层中，其中抗静电剂占第一外表层和第二外表层总质量的2％～6％。The first outer layer and the second outer layer contain an antistatic agent, and the antistatic agent is composed of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives. At least one of the first outer layer and the second outer layer is uniformly dispersed in the first outer layer and the second outer layer, wherein the antistatic agent accounts for 2% to 6% of the total mass of the first outer layer and the second outer layer.
本发明还公开了所述的高折射率的光扩散板的合成方法，包括如下步骤：The invention also discloses a method for synthesizing the high-refractive-index light diffusing plate, comprising the following steps:
(1)准备基材步骤：选用光学级聚苯乙烯颗粒或者PMMA粒子作为基材；(1) Step of preparing the base material: select optical grade polystyrene particles or PMMA particles as the base material;
(2)制作光学母粒步骤：(2) Steps of making optical masterbatch:
从准备的基材中选取：选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第一螺杆造粒机中，将其融化为浆状；Select from the prepared substrates: select two feeding bins, namely the first feeding bin and the second feeding bin, and add 95% optical grade polystyrene, 1% silicone particles, The mixture of 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder is uniformly stirred and mixed and then put into the first screw granulator, and melted into a slurry;
在第二加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第二螺杆造粒机中，将其融化为浆状；A mixture of 95% optical grade polystyrene, 1% organosilicon particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder was added in the second feeding bin to be uniform After stirring and mixing, put it into the second screw granulator, and melt it into a slurry;
所述粉剂包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂中的一种或多种；The powder includes one or more of a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubricating dispersing agent;
(3)挤出成型步骤：(3) Extrusion molding steps:
将第一螺杆造粒机的机头挤出的浆状熔融物通过分配器后分别输送给三层叠加模头的上层和下层，将第二螺杆造粒机的机头挤出的浆状熔融物输送给三层叠加模头的中间层，通过控制第一螺杆造粒机和第二螺杆造粒机的挤出速率和分配器的分配比例可以一次调节三层叠加模头上层、中间层、下层厚度，通过调节三层叠加摸头的间隙可以二次调节三层叠加摸头上层、中间层、下层厚度，三层叠加模头的上层模头的吐出物形成扩散板的第一外表面层，中间层模头的吐出物形成扩散板的中间层，下层模头的吐出物形成扩散板的第二外表面，扩散板的第一外表面、中间层和第二外表面通过三辊延压冷却成型形成扩散板成品。The slurry-like melt extruded from the head of the first screw granulator is transported to the upper and lower layers of the three-layer superimposed die through the distributor, and the slurry-like melt extruded from the head of the second screw granulator is melted. By controlling the extrusion rate of the first screw granulator and the second screw granulator and the distribution ratio of the distributor, the upper layer, middle layer, The thickness of the lower layer, the thickness of the upper layer, the middle layer and the lower layer of the three-layer stacking die can be adjusted twice by adjusting the gap of the three-layer stacking die. The spit from the layer die forms the middle layer of the diffuser, the spit from the lower die forms the second outer surface of the diffuser, and the first outer surface, the middle layer and the second outer surface of the diffuser are cooled and formed by three-roll rolling The finished diffuser plate is formed.
(4)冷却裁切步骤：(4) Cooling and cutting steps:
经过三辊延压后的扩散板通过传送带向前输送，在输送过程中自然冷却或通过冷却液进行冷却至室温后，裁切至适当的成品尺寸。After the three-roller rolling, the diffuser plate is conveyed forward through the conveyor belt, and is naturally cooled during the conveying process or cooled to room temperature by the cooling liquid, and then cut to the appropriate finished product size.
所述制作光学母粒步骤中，所述双螺杆造粒机中的造粒温度在160度至220度之间，造粒压力在4.5Mpa至13.5Mpa之间。In the step of making the optical master batch, the granulation temperature in the twin-screw granulator is between 160 degrees and 220 degrees, and the granulation pressure is between 4.5Mpa and 13.5Mpa.
所述挤出成型步骤中，所述挤出成型机中的板材成型温度在170度至230度之间，板材成型压力在4.5Mpa至13.5Mpa之间。In the extrusion forming step, the plate forming temperature in the extrusion forming machine is between 170 degrees and 230 degrees, and the plate forming pressure is between 4.5 Mpa and 13.5 Mpa.
与现有技术相比，本发明的高雾度、高透光率的光扩散板使用的材料简单，都是较为容易获得的原料，且用量相对较少，故原材料成本相对较低。另外，由于本发明中中间层2中有机硅的中空微球4的折射率为1.02，光学级聚苯乙烯的的折射率为1.52，光学级聚苯乙烯的折射率为1.52；有机硅粒子的折射率为1.45，PMMA粒子的折射率为1.49，二氧化钛粒子的折射率为1.45，通过引入低折射率角度的光扩散剂，丰富了光的折射角度，增加了光通过不同的材料的折射角度的可能性，更多的改变光的方向，使得光源通过光扩散板时混光效果更好，透光率大大增加，可以满足大部分的市场需求， 符合TFT-LCD产品的需求和发展。Compared with the prior art, the high haze, high transmittance light diffusing plate of the present invention uses simple materials, which are relatively easy to obtain raw materials, and the amount used is relatively small, so the raw material cost is relatively low. In addition, since the refractive index of the hollow microspheres 4 of silicone in the intermediate layer 2 in the present invention is 1.02, the refractive index of optical grade polystyrene is 1.52, and the refractive index of optical grade polystyrene is 1.52; The refractive index is 1.45, the refractive index of PMMA particles is 1.49, and the refractive index of titanium dioxide particles is 1.45. By introducing a light diffusing agent with a low refractive index angle, the refraction angle of light is enriched and the refraction angle of light passing through different materials is increased. It is possible to change the direction of the light more, so that when the light source passes through the light diffusion plate, the light mixing effect is better, and the light transmittance is greatly increased, which can meet most market demands and meet the needs and development of TFT-LCD products.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (10)

  1. 一种高折射率的光扩散板，其包括：第一外表面层(1)、中间层(2)、第二外表面层(3)，所述的第一外表面层(1)分为上表面和下表面，所述的中间层(2)分为上表面和下表面，所述的第二外表面层(3)分为上表面和下表面，所述的中间层(2)的上表面与第一外表面层(1)的下表面结合，所述的中间层(2)的下表面与第二外表面层(3)的上表面结合；所述的第一外表面层(1)、中间层(2)和第二外表面层(3)的基材相同，其特征在于：第一外表面层(1)、中间层(2)和第二外表面层(3)均添加了有机硅粒子、二氧化钛粒子、中空微球(4)，第一外表面层(1)和第二外表面层(3)中添加抗UV剂、抗静电剂中的一种或多种，中空微球(4)的主要成分为有机硅。A high-refractive-index light diffusing plate, comprising: a first outer surface layer (1), an intermediate layer (2), and a second outer surface layer (3), wherein the first outer surface layer (1) is divided into Upper surface and lower surface, described intermediate layer (2) is divided into upper surface and lower surface, described second outer surface layer (3) is divided into upper surface and lower surface, described intermediate layer (2) The upper surface is combined with the lower surface of the first outer surface layer (1), the lower surface of the intermediate layer (2) is combined with the upper surface of the second outer surface layer (3); the first outer surface layer ( 1), the base material of the intermediate layer (2) and the second outer surface layer (3) is the same, and it is characterized in that: the first outer surface layer (1), the intermediate layer (2) and the second outer surface layer (3) are all Silicone particles, titanium dioxide particles, and hollow microspheres (4) are added, and one or more of anti-UV agents and antistatic agents are added to the first outer surface layer (1) and the second outer surface layer (3), The main component of the hollow microspheres (4) is organosilicon.
  2. 如权利要求1所述的高折射率的光扩散板，其特征在于：第一外表面层(1)、中间层(2)和第二外表面层(3)每层中的有机硅粒子、二氧化钛粒子、二氧化碳粒子和中空微球(4)的重量份数配比相同，分别为：90％～95％光学级聚苯乙烯或者PMMA粒子,1％～2％有机硅粒子，1％～2％二氧化钛粒子，1％～2％二氧化碳粒子，1％～2％中空微球(4)。The light diffusing plate with high refractive index according to claim 1, characterized in that: the organic silicon particles in each layer of the first outer surface layer (1), the intermediate layer (2) and the second outer surface layer (3), Titanium dioxide particles, carbon dioxide particles and hollow microspheres (4) have the same proportions by weight, respectively: 90%-95% optical grade polystyrene or PMMA particles, 1%-2% silicone particles, 1%-2% % titanium dioxide particles, 1% to 2% of carbon dioxide particles, 1% to 2% of hollow microspheres (4).
  3. 如权利要求1所述的高折射率的光扩散板，其特征在于：光学级聚苯乙烯的折射率为1.51～1.52；有机硅粒子的折射率为1.42-1.45，PMMA粒子的折射率为1.45-1.49，二氧化钛粒子的折射率为1.42-1.45，中空微球(4)的折射率为1.0-1.02。The light diffusing plate with high refractive index according to claim 1, wherein the refractive index of optical grade polystyrene is 1.51-1.52; the refractive index of organic silicon particles is 1.42-1.45, and the refractive index of PMMA particles is 1.45 -1.49, the refractive index of the titanium dioxide particles is 1.42-1.45, and the refractive index of the hollow microspheres (4) is 1.0-1.02.
  4. 如权利要求1所述的高折射率的光扩散板，其特征在于：中空微球(4)的平均粒径为1～20um。The light diffusing plate with high refractive index according to claim 1, characterized in that: the average particle size of the hollow microspheres (4) is 1-20um.
  5. 如权利要求1所述的高折射率的光扩散板，其特征在于：第一外表面层(1)和第二外表面层(3)中包含具有抗UV、抗静电等功能材料中的一种或多种。The high-refractive-index light diffusing plate according to claim 1, wherein the first outer surface layer (1) and the second outer surface layer (3) contain one of the functional materials such as anti-UV and anti-static. one or more.
  6. 如权利要求1所述的高折射率的光扩散板，其特征在于：第一外表层和第二外表层中含有抗UV剂，所述的抗UV剂为含苯甲酸类、二苯甲酮类、苯并***类、或部分受阻胺类中的至少一种，且均匀分散在第一外表层 和第二外表层中，其中抗UV剂占第一外表层和第二外表层总质量的3％～5％。The light diffusing plate with high refractive index as claimed in claim 1, characterized in that: the first outer layer and the second outer layer contain an anti-UV agent, and the anti-UV agent is a benzoic acid-containing, benzophenone-containing At least one of amines, benzotriazoles, or partially hindered amines, and uniformly dispersed in the first outer layer and the second outer layer, wherein the anti-UV agent accounts for the total mass of the first outer layer and the second outer layer of 3% to 5%.
  7. 如权利要求1所述的高折射率的光扩散板，其特征在于：第一外表层和第二外表层中含有抗静电剂，所述的抗静电剂为包含硫酸衍生物、磷酸衍生物、胺类、季铵盐、咪唑类以及环氧乙烷衍生物中的至少一种，且均匀分散在第一外表层和第二外表层中，其中抗静电剂占第一外表层和第二外表层总质量的2％～6％。The high-refractive-index light diffusing plate according to claim 1, wherein the first outer surface layer and the second outer surface layer contain an antistatic agent, and the antistatic agent comprises sulfuric acid derivatives, phosphoric acid derivatives, At least one of amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives is uniformly dispersed in the first outer layer and the second outer layer, wherein the antistatic agent accounts for the first outer layer and the second outer layer. 2% to 6% of the total mass of the surface layer.
  8. 如权利要求1所述的高折射率的光扩散板的合成方法，包括如下步骤：The method for synthesizing a light diffusing plate with high refractive index as claimed in claim 1, comprising the steps of:
    (1)准备基材步骤：选用光学级聚苯乙烯颗粒或者PMMA粒子作为基材；(1) Step of preparing the base material: select optical grade polystyrene particles or PMMA particles as the base material;
    (2)制作光学母粒步骤：从准备的基材中选取：选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第一螺杆造粒机中，将其融化为浆状；在第二加料仓中添加质量百分比为95％光学级聚苯乙烯、1％有机硅粒子、1％PMMA粒子、1％二氧化钛粒子、1％二氧化碳粒子、1％中空微球4和粉剂的混合物均匀搅拌混合后投入第二螺杆造粒机中，将其融化为浆状；所述粉剂包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂中的一种或多种；(2) Steps of making optical masterbatch: Select from the prepared base material: select two feeding bins, respectively the first feeding bin and the second feeding bin, and adding a mass percentage of 95% optical grade polymer to the first feeding bin The mixture of styrene, 1% silicone particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and powder is uniformly stirred and mixed and then put into the first screw granulator to melt it It is a slurry; in the second feeding bin, add 95% optical grade polystyrene, 1% silicone particles, 1% PMMA particles, 1% titanium dioxide particles, 1% carbon dioxide particles, 1% hollow microspheres 4 and The mixture of powder is uniformly stirred and mixed and put into the second screw granulator, and it is melted into a slurry; the powder includes one or more of a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubricating dispersing agent ;
    (3)挤出成型步骤：将第一螺杆造粒机的机头挤出的浆状熔融物通过分配器后分别输送给三层叠加模头的上层和下层，将第二螺杆造粒机的机头挤出的浆状熔融物输送给三层叠加模头的中间层，通过控制第一螺杆造粒机和第二螺杆造粒机的挤出速率和分配器的分配比例可以一次调节三层叠加模头上层、中间层、下层厚度，通过调节三层叠加摸头的间隙可以二次调节三层叠加摸头上层、中间层、下层厚度，三层叠加模头的上层模头的吐出物形成扩散板的第一外表面层，中间层模头的吐出物形成扩散板的中间层，下层模头的吐出物形成扩散板的第二外表面，扩散板的第一外表面、中间层和第二外表面通过三辊延压冷却成型形成扩散板成品。(3) extrusion molding step: the slurry melt extruded from the head of the first screw granulator is transported to the upper and lower layers of the three-layer superimposed die after passing through the distributor, and the second screw granulator is The slurry-like melt extruded from the die head is delivered to the middle layer of the three-layer superimposed die, and the three layers can be adjusted at one time by controlling the extrusion rate of the first screw granulator and the second screw granulator and the distribution ratio of the distributor The thickness of the upper, middle and lower layers of the superimposed die head can be adjusted twice by adjusting the gap of the three-layer superimposed die head, and the thickness of the upper layer, middle layer and lower layer of the three-layer superimposed die head can be adjusted twice. The first outer surface layer of the first outer surface layer, the spit of the middle layer die forms the middle layer of the diffusion plate, the spit of the lower layer die forms the second outer surface of the diffusion plate, the first outer surface, the middle layer and the second outer surface of the diffusion plate are formed. The surface is cooled and formed by three-roll rolling to form a finished diffuser plate.
    (4)冷却裁切步骤：经过三辊延压后的扩散板通过传送带向前输送，在输送过程中自然冷却或通过冷却液进行冷却至室温后，裁切至适当的 成品尺寸。(4) Cooling and cutting step: The diffuser plate after being rolled by three rollers is transported forward by a conveyor belt, and is naturally cooled or cooled to room temperature by a cooling liquid during the transport process, and then cut to an appropriate finished product size.
  9. 如权利要求8所述的高折射率的光扩散板的合成方法，其特征在于：所述制作光学母粒步骤中，所述双螺杆造粒机中的造粒温度在160度至220度之间，造粒压力在4.5Mpa至13.5Mpa之间。The method for synthesizing a light diffusing plate with high refractive index as claimed in claim 8, wherein in the step of making optical master batches, the granulation temperature in the twin-screw granulator is between 160 degrees and 220 degrees. During this time, the granulation pressure is between 4.5Mpa and 13.5Mpa.
  10. 如权利要求8所述的高折射率的光扩散板的合成方法，其特征在于：挤出成型步骤中，所述挤出成型机中的板材成型温度在170度至230度之间，板材成型压力在4.5Mpa至13.5Mpa之间。The method for synthesizing a light diffusing plate with high refractive index according to claim 8, wherein in the extrusion molding step, the plate forming temperature in the extrusion forming machine is between 170 degrees and 230 degrees, and the plate forming temperature is between 170 degrees and 230 degrees. The pressure is between 4.5Mpa and 13.5Mpa.
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