WO2022222175A1 - 一种含有氮气球或者二氧化碳气体球的光扩散板 - Google Patents

一种含有氮气球或者二氧化碳气体球的光扩散板 Download PDF

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Publication number
WO2022222175A1
WO2022222175A1 PCT/CN2021/090667 CN2021090667W WO2022222175A1 WO 2022222175 A1 WO2022222175 A1 WO 2022222175A1 CN 2021090667 W CN2021090667 W CN 2021090667W WO 2022222175 A1 WO2022222175 A1 WO 2022222175A1
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layer
carbon dioxide
intermediate layer
surface layer
dioxide gas
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PCT/CN2021/090667
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English (en)
French (fr)
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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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Publication of WO2022222175A1 publication Critical patent/WO2022222175A1/zh

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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
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
    • 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
    • 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 containing nitrogen gas balls or carbon dioxide gas balls.
  • 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 this way, an optical diffusion effect is obtained.
  • Light diffusing plate also known as homogenizing plate and light diffusing plate, has certain characteristics such as high light diffusivity, high light transmittance and high haze.
  • the preparation process of the light diffuser plate is as follows: feeding, heating the barrel, starting the host motor, adjusting the extruder die head, adjusting the spacing of the shaping cooling rollers to achieve the required thickness of the plate, cutting the width, cutting the length of the machine, Diffuser plate stacking inspection and packaging.
  • the existing light diffusing plates are all transparent plates extruded from a single component such as PS, PC, PMMA, etc., and the light diffusing plates are relatively heavy, which increases the weight of the display screen virtually, and also The cost of the light diffusing plate is increased.
  • the present invention proposes a light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls, which mainly includes 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, anti-static, foaming and other functions;
  • the innovation of the present invention is to add gas N 2 or C0 2 in the intermediate layer by means of physical foaming, so that the N 2 or C0 2 gas can be uniformly dispersed in the intermediate layer.
  • the refraction effect of the intermediate layer can be effectively increased, the light mixing is more uniform, and the performance of the light diffusing plate is improved.
  • the density of the intermediate layer is reduced from the original 1.0-1.1 g/cm 3 to 0.7-0.9 g/cm 3 , and the mass of the intermediate layer is reduced when the volume remains unchanged. Lighten by 10%-30%, in line with industry lightweight indicators, and enhance the possibility of application scenarios of diffuser panels.
  • a light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls 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, the The middle 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 middle layer is combined with the lower surface of the first outer surface layer, and the middle The lower surface of the layer 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 intermediate layer is added with hollow microspheres, the hollow The main component of the microspheres is silicone, the hollow microspheres are filled with nitrogen gas or carbon dioxide gas, 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 total thickness of the first outer layer, the middle layer, and the second outer layer is 1.0 mm to 2.5 mm.
  • the sum of the thicknesses of the first outer layer and the second outer layer accounts for 6% to 7% of the total thickness.
  • the materials of the first outer surface layer 1 and the second outer surface layer 3 include one or more functional materials such as anti-UV, anti-static, anti-ash layer, and foaming.
  • adding an anti-UV agent to the masterbatch can make the light diffuser have anti-UV effect; adding an antistatic agent to the masterbatch can make the light diffuser have an antistatic effect; adding an antistatic agent to the masterbatch Dusting agent can make the light diffusing plate have the effect of preventing dust; adding a foaming agent to the master batch can make the light diffusing plate have the effect of foaming.
  • the anti-UV agent includes at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines.
  • the antistatic agent comprises at least one of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives.
  • the intermediate layer masterbatch is polystyrene (PS), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate At least one of glycol ester (PET), acrylic (PMMA), and acrylic acid (MMA).
  • PS polystyrene
  • PC polycarbonate
  • PE polyethylene
  • PP polypropylene
  • PVC polyvinyl chloride
  • PET glycol ester
  • acrylic PMMA
  • MMA acrylic acid
  • the intermediate layer contains a light diffusing agent
  • the light diffusing agent includes one or more of an inorganic light diffusing agent and an organic light diffusing agent.
  • the inorganic light diffusing agent includes nano barium sulfate, calcium carbonate, silicon dioxide, etc.
  • the organic light diffusing agent includes acrylic type, styrene type, acrylic type, and the like.
  • the content of the hollow microspheres in the intermediate layer accounts for 1% to 2% of the mass of the intermediate layer.
  • the refractive index of the hollow microspheres 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.
  • the density of the intermediate layer is 0.8-0.9 g/cm 3 .
  • the hollow microspheres do not contain nitrogen gas or carbon dioxide gas, and the refractive index of the hollow microspheres is 1, which is rich in the refraction path of light in it.
  • the invention also discloses a method for synthesizing the light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls, comprising the following steps:
  • Steps of preparing the substrate choose polystyrene (PS), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate At least one of ester (PET), acrylic (PMMA), and acrylic acid (MMA) is used as the base material;
  • PS polystyrene
  • PC polycarbonate
  • PE polyethylene
  • PP polypropylene
  • PVC polyvinyl chloride
  • PET ester
  • acrylic PMMA
  • MMA acrylic acid
  • Two feeding bins are selected, namely the first feeding bin and the second feeding bin, the base material and the powder are added to the first feeding bin for mixing, and after mixing, the screw extruder is stirred to heat up and melt;
  • a mixture of base material, hollow microspheres and powder is added to the second feeding bin, wherein the mass percentage of the hollow microspheres in the mixture in the second feeding bin is 1% to 2%; continuous feeding into the bottom of the second feeding bin Nitrogen and carbon dioxide, and maintain stirring to make the mixture evenly mixed; after mixing, the mixture in the second feeding bin is sequentially passed through the dynamic mixing section and the static mixing section of the screw extruder to realize the mixing and heating and melting process;
  • the powder mixture includes a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer, and a lubricating dispersing agent;
  • the extruded melt from the first screw extruder is distributed to the upper and lower layers of the three-layer stacking die after passing through the distributor, and the extrusion melt from the second screw extruder is delivered to the middle layer of the three-layer stacking die.
  • the thickness of the upper, middle and lower layers of the three-layer superimposed die can be adjusted at one time, and the gap of the three-layer superimposed die can be adjusted at one time.
  • the thickness of the upper layer, middle layer and lower layer of the three-layer stacking die can be adjusted twice.
  • the spit from the upper die of the three-layer stacking die forms the first outer surface layer of the diffuser plate
  • the spit from the middle layer die forms the middle of the diffuser plate.
  • the second outer surface of the diffuser plate is formed by the spit from the lower layer of the die, and the first outer surface, the middle layer and the second outer surface of the diffuser plate are cooled and formed by three-roll rolling to form the finished diffuser plate.
  • 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 valve opening of the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder controls the valve opening of the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder, the amount of nitrogen or carbon dioxide entering the second feeding bin, and the discharge of liquid nitrogen or carbon dioxide from the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder are controlled. 30-50g/hour.
  • the granulation temperature in the twin-screw granulator is between 160 degrees and 220 degrees, and the granulation pressure is between 4.5 Mpa and 13.5 Mpa.
  • 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 light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls of the present invention adds hollow microspheres with a mass percentage of 1% to 2% in the intermediate layer, and the main component of the hollow microspheres is organic silicon.
  • the refractive index of hollow microspheres is 1, the refractive index of optical grade polystyrene is 1.51-1.52, 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 The refractive index is 1.45-1.49, and the refractive index of titanium dioxide particles is 1.42-1.45.
  • the light passes through different materials, and the angle of refraction is different, thereby changing the direction of the light, so that the light transmittance is greatly increased when the light source passes through the light diffuser. It is in line with the growth needs and development of the energy-saving industry, and liquid nitrogen or carbon dioxide is added to the hollow microspheres in the molten state. When the light diffusion plate becomes normal temperature, the liquid nitrogen or carbon dioxide is completely vaporized, and the middle layer is composed of The density of the original 1.0-1.1g/cm3 is changed to 0.8-0.9g/cm3, and the total mass is reduced by 20% compared to the original light diffusing plate under the condition of the same volume.
  • FIG. 1 is a schematic structural diagram of a light diffusing plate containing nitrogen gas or carbon dioxide gas balls according to a specific embodiment.
  • FIG. 1 it is a schematic diagram of the structure of a light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls.
  • a light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls 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 an upper surface and a lower surface Surface, 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 and the first outer surface layer 1 The lower surface is combined, 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, It is characterized in that: the intermediate layer 2 is added with hollow microspheres 4, the main component of the hollow microspheres 4 is silicone, the hollow microspheres 4 are filled with nitrogen or carbon dioxide gas, the first outer surface layer 1 and the second outer surface layer 3. One or more of anti-UV agent and anti-static agent are added in the medium.
  • the total thickness of the first outer layer 1 , the intermediate layer 2 and the second outer layer 3 is 1.0 mm to 2.5 mm.
  • the sum of the thicknesses of the first outer skin layer 1 and the second outer skin layer 3 accounts for 6% to 7% of the total thickness.
  • the materials of the first outer surface layer 1 and the second outer surface layer 3 include one or more of functional materials such as anti-UV, anti-static, anti-ash layer, and foam.
  • adding an anti-UV agent to the masterbatch can make the light diffuser have anti-UV effect; adding an antistatic agent to the masterbatch can make the light diffuser have an antistatic effect; adding an antistatic agent to the masterbatch Dusting agent can make the light diffusing plate have the effect of preventing dust; adding a foaming agent to the master batch can make the light diffusing plate have the effect of foaming.
  • the anti-UV agent includes at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines.
  • the antistatic agent comprises at least one of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives.
  • the intermediate layer contains a light diffusing agent
  • the light diffusing agent includes one or more of an inorganic light diffusing agent and an organic light diffusing agent.
  • the inorganic light diffusing agent includes nano barium sulfate, calcium carbonate, silicon dioxide, etc.
  • the organic light diffusing agent includes acrylic type, styrene type, acrylic type, and the like.
  • the content of the hollow microspheres 4 in the intermediate layer 2 accounts for 1% by mass of the intermediate layer 2 .
  • 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 density of the intermediate layer 2 is 0.8 g/cm3.
  • the hollow microspheres 4 do not contain nitrogen gas or carbon dioxide gas, and the refractive index of the hollow microspheres 4 A value of 1 enriches the refraction paths of light in it.
  • the invention also discloses a method for synthesizing the light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls, comprising the following steps:
  • Steps of preparing the base material choose polystyrene (PS) as the base material;
  • Two feeding bins are selected, namely the first feeding bin and the second feeding bin, the base material and the powder are added to the first feeding bin for mixing, and after mixing, the screw extruder is stirred to heat up and melt;
  • a mixture of base material, hollow microspheres and powder is added to the second feeding bin, wherein the mass percentage of the hollow microspheres in the mixture in the second feeding bin is 1% to 2%; continuous feeding into the bottom of the second feeding bin Nitrogen and carbon dioxide, and maintain stirring to make the mixture evenly mixed; after mixing, the mixture in the second feeding bin is sequentially passed through the dynamic mixing section and the static mixing section of the screw extruder to realize the mixing and heating and melting process;
  • the powder mixture includes a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer, and a lubricating dispersing agent;
  • the extruded melt from the first screw extruder is distributed to the upper and lower layers of the three-layer stacking die after passing through the distributor, and the extrusion melt from the second screw extruder is delivered to the middle layer of the three-layer stacking die.
  • the thickness of the upper, middle and lower layers of the three-layer superimposed die can be adjusted at one time, and the gap of the three-layer superimposed die can be adjusted at one time.
  • the thickness of the upper layer, middle layer and lower layer of the three-layer stacking die can be adjusted twice.
  • the spit from the upper die of the three-layer stacking die forms the first outer surface layer of the diffuser plate
  • the spit from the middle layer die forms the middle of the diffuser plate.
  • the second outer surface of the diffuser plate is formed by the spit from the lower layer of the die, and the first outer surface, the middle layer and the second outer surface of the diffuser plate are cooled and formed by three-roll rolling to form the finished diffuser plate.
  • the diffuser plate is conveyed forward through the conveyor belt, cooled naturally during the conveying process or cooled to room temperature by cooling liquid, and then cut to the appropriate finished product size.
  • the valve opening of the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder controls the valve opening of the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder, the amount of nitrogen or carbon dioxide entering the second feeding bin, and the discharge of liquid nitrogen or carbon dioxide from the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder are controlled. 30-50g/hour.
  • 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.
  • hollow microspheres 4 with a mass percentage of 1% are added in the intermediate layer 2, and the main component of the hollow microspheres 4 is silicone,
  • the refractive index of the hollow microspheres 4 is 1, the refractive index of optical grade polystyrene is 1.51-1.52, 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
  • the refractive index of TiO2 is 1.45-1.49, and the refractive index of titanium dioxide particles is 1.42-1.45;
  • the innovation of the present invention lies in adding gas N 2 or CO 2 in the intermediate layer by means of physical foaming, so that the N 2 or CO 2 gas can be Evenly dispersed in the middle layer.
  • the refraction effect of the intermediate layer can be effectively increased, the light mixing is more uniform, and the performance of the light diffusing plate is improved.
  • the density of the middle layer is reduced from the original 1.0-1.1g/cm3 to 0.7-0.9g/cm3, and the mass of the middle layer is reduced by 10 when the volume remains unchanged. %-30%, in line with the industry's lightweight indicators, and enhances the possibility of diffuser plate application scenarios.
  • a light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls 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 an upper surface and a lower surface Surface, 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 and the first outer surface layer 1 The lower surface is combined, 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, It is characterized in that: the intermediate layer 2 is added with hollow microspheres 4, the main component of the hollow microspheres 4 is silicone, the hollow microspheres 4 are filled with nitrogen or carbon dioxide gas, the first outer surface layer 1 and the second outer surface layer 3. One or more of anti-UV agent and anti-static agent are added in the medium.
  • the total thickness of the first outer layer 1 , the intermediate layer 2 and the second outer layer 3 is 1.0 mm to 2.5 mm.
  • the sum of the thicknesses of the first outer skin layer 1 and the second outer skin layer 3 accounts for 6% to 7% of the total thickness.
  • the materials of the first outer surface layer 1 and the second outer surface layer 3 include one or more of functional materials such as anti-UV, anti-static, anti-ash layer, and foam.
  • adding an anti-UV agent to the masterbatch can make the light diffuser have anti-UV effect; adding an antistatic agent to the masterbatch can make the light diffuser have an antistatic effect; adding an antistatic agent to the masterbatch Dusting agent can make the light diffusing plate have the effect of preventing dust; adding a foaming agent to the master batch can make the light diffusing plate have the effect of foaming.
  • the anti-UV agent includes at least one of benzoic acids, benzophenones, benzotriazoles, or partially hindered amines.
  • the antistatic agent comprises at least one of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives.
  • the intermediate layer contains a light diffusing agent
  • the light diffusing agent includes one or more of an inorganic light diffusing agent and an organic light diffusing agent.
  • the inorganic light diffusing agent includes nano barium sulfate, calcium carbonate, silicon dioxide, etc.
  • the organic light diffusing agent includes acrylic type, styrene type, acrylic type, and the like.
  • the content of the hollow microspheres 4 in the interlayer 2 accounts for 2% of the mass of the interlayer 2 .
  • the refractive index of the 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 density of the intermediate layer 2 is 0.9 g/cm3.
  • the hollow microspheres 4 do not contain nitrogen gas or carbon dioxide gas, and the refractive index of the hollow microspheres 4 A value of 1 enriches the refraction paths of light in it.
  • the invention also discloses a method for synthesizing the light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls, comprising the following steps:
  • a mixture of base material, hollow microspheres and powder is added to the second feeding bin, wherein the mass percentage of the hollow microspheres in the mixture in the second feeding bin is 1% to 2%; continuous feeding into the bottom of the second feeding bin Nitrogen and carbon dioxide, and maintain stirring to make the mixture evenly mixed; after mixing, the mixture in the second feeding bin is sequentially passed through the dynamic mixing section and the static mixing section of the screw extruder to realize the mixing and heating and melting process;
  • the powder mixture includes a diffusing agent, an anti-UV agent, an oxidizing agent, a light stabilizer, and a lubricating dispersing agent;
  • the extruded melt from the first screw extruder is distributed to the upper and lower layers of the three-layer stacking die after passing through the distributor, and the extrusion melt from the second screw extruder is delivered to the middle layer of the three-layer stacking die.
  • the thickness of the upper, middle and lower layers of the three-layer superimposed die can be adjusted at one time, and the gap of the three-layer superimposed die can be adjusted at one time.
  • the thickness of the upper layer, middle layer and lower layer of the three-layer stacking die can be adjusted twice.
  • the spit from the upper die of the three-layer stacking die forms the first outer surface layer of the diffuser plate
  • the spit from the middle layer die forms the middle of the diffuser plate.
  • the second outer surface of the diffuser plate is formed by the spit from the lower layer of the die, and the first outer surface, the middle layer and the second outer surface of the diffuser plate are cooled and formed by three-roll rolling to form the finished diffuser plate.
  • 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 valve opening of the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder controls the valve opening of the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder, the amount of nitrogen or carbon dioxide entering the second feeding bin, and the discharge of liquid nitrogen or carbon dioxide from the high-pressure nitrogen cylinder or the high-pressure carbon dioxide cylinder are controlled. 30-50g/hour.
  • the granulation temperature in the twin-screw granulator is between 160 degrees and 220 degrees, and the granulation pressure is between 4.5 Mpa and 13.5 Mpa.
  • 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 light diffusing plate containing nitrogen gas balls or carbon dioxide gas balls of the present invention adds hollow microspheres 4 with a mass percentage of 2% in the intermediate layer 2, and the main component of the hollow microspheres 4 is organic silicon,
  • the refractive index of the hollow microspheres 4 is 1, the refractive index of optical grade polystyrene is 1.51-1.52, 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
  • the refractive index of TiO2 is 1.45-1.49, and the refractive index of titanium dioxide particles is 1.42-1.45;
  • the innovation of the present invention lies in adding gas N 2 or CO 2 in the intermediate layer by means of physical foaming, so that the N 2 or CO 2 gas can be Evenly dispersed in the middle layer.
  • the refraction effect of the intermediate layer can be effectively increased, the light mixing is more uniform, and the performance of the light diffusing plate is improved.
  • the density of the middle layer is reduced from the original 1.0-1.1g/cm3 to 0.7-0.9g/cm3, and the mass of the middle layer is reduced by 10 when the volume remains unchanged. %-30%, in line with the industry's lightweight indicators, and enhances the possibility of diffuser plate application scenarios.

Abstract

一种含有氮气球或者二氧化碳气体球的光扩散板，分别为第一外表面层（1）、第二外表面层（3）和中间层（2），其中以上的三层扩散板的基材相同，而第一外表面层（1）和第二外表面层（3）中的功能型微粒相同，用来提升表面层的特殊功能；中间层（2）中通过物理起泡的方式加入气体N 2或CO 2，使得N 2或CO 2气体能够均匀分散在中间层（2）中。由于引入低折射率的N 2或CO 2气体球，可以有效增加中间层（2）的折射效果，使得混光更加均匀，提升光扩散板性能。由于中间层（2）引入N 2或CO 2气体球，使得中间层（2）的密度由原来的1.0-1.1g/cm3降低为0.7-0.9g/cm3，在体积不变的情况下，使得中间层（2）的质量减轻10％-30％，符合行业轻量化指标，增强了扩散板应用场景的可能性。

Description

一种含有氮气球或者二氧化碳气体球的光扩散板 技术领域
本发明涉及光电材料领域，较为具体的，涉及一种含有氮气球或者二氧化碳气体球的光扩散板。
背景技术
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。光扩散板又称匀光板、扩光板，具有一定的高光扩散性、高光透光率以及高雾度等特征。通常情况下，光扩散板的制备流程为：加料、料筒加温、开始主机马达、调节挤出机模头、调节定形冷却辊筒的间距达到板材所需厚度、宽度切断、长度切断机、扩散板堆放检查、包装。
在现有技术中，现有的光扩散板都是采用PS、PC、PMMA等单一成份单层挤压而成的透明板材，光扩散板比较重，无形之中增加显示屏的重量，同时也增加了光扩散板的成本。
发明内容
有鉴于此，本发明提出一种含有氮气球或者二氧化碳气体球的光扩散板，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中间层中通过物理起泡的方式加入气体N 2或C0 2，使得N 2或C0 2气体能够均匀分散在中间层中。由于引入低折射率的N 2或C0 2气体球，可以有效增加中间层的折射效果，使得混光更加均匀，提升光扩散板性能。由于中间层引入N 2或C0 2气体球，使得中间层的密度由原来的1.0-1.1g/cm 3降低为0.7-0.9g/cm 3，在体积不变的情况下，使得中间层的质量减轻10％-30％，符合行业轻量化指标，增强了扩散板应用场景的可能性。
一种含有氮气球或者二氧化碳气体球的光扩散板，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：中间层添加了中空微球，中空微球的主要成分为有机硅，中空微球内部充有氮气或者二氧化碳气体，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。
进一步的，通常情况下，第一外表层、中间层、第二外表层的总厚度在1.0mm～2.5mm。优选的是，第一外表层和第二外表层的厚度和占总厚度的6％～7％。
进一步的，第一外表层1和第二外表层3的材质中包含具有抗UV、抗静电、抗灰层、发泡等功能材料中的一种或多种。通常情况下，在母料中加入抗UV剂，可以使得光扩散板具有抗UV的效果；在母料中加入抗静电剂，可以使得光扩散板具有抗静电的作用；在母料中加入防尘剂，可以使得光扩散板具有防止灰尘的作用；在母料中加入发泡剂，可以使得光扩散板具有发泡的作用。
进一步的，所述的抗UV剂包含苯甲酸类、二苯甲酮类、苯并三唑类、或部分受阻胺类中的至少一种。
进一步的，所述的抗静电剂包含硫酸衍生物、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。
进一步的，所述的中间层母粒为聚苯乙烯(PS)、聚碳酸酯(PC)、聚乙烯(PE)、聚丙烯(PP)、聚氯乙烯(PVC)、聚对苯二甲酸乙二醇酯(PET)、压克力(PMMA)、丙烯酸(MMA)中的至少一种。
更进一步的，所述的中间层中包含有光扩散剂，所述的光扩散剂包含无机光扩散剂和有机光扩散剂中的一种或多种。具体的，所述的无机光扩散剂包含纳米硫酸钡，碳酸钙，二氧化硅等，所述的有机光扩散剂包含压克力型，苯乙烯型，丙烯酸型等。
进一步的，中间层的中空微球的含量占中间层的质量比为1％～2％。
进一步的，中空微球的折射率为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。
进一步的，中间层的的密度是0.8-0.9g/cm 3。
进一步的，第一外表面层和第二外表面层的其中一层或者两层中加入中空微球的，中空微球中不含有氮气球或者二氧化碳气体，中空微球的折射率为1，丰富了光在其中的折射路径。
本发明还公开了所述的含有氮气球或者二氧化碳气体球的光扩散板的合成方法，包括如下步骤：
(1)准备基材步骤：选用聚苯乙烯(PS)、聚碳酸酯(PC)、聚乙烯(PE)、聚丙烯(PP)、聚氯乙烯(PVC)、聚对苯二甲酸乙二醇酯(PET)、压克力(PMMA)、丙烯酸(MMA)中的至少一种作为基材；
(2)制作光学母粒步骤：
选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中加入基材和粉剂进行混合，混合均匀后经过螺杆挤出机进行搅拌升温融化；
在第二加料仓中加入基材、中空微球和粉剂的混合物，其中空微球占第二加料仓中混合物的质量百分比为1％～2％；向第二加料仓的底部持续不断通入氮气和二氧化碳，并维持搅拌使得混合物混合均匀；混合均匀后将第二加料仓的混合物依次经过螺杆挤出机的动态混合段和静态混合段，实现混合和升温熔融过程；
所述粉剂混合物包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂；
(3)挤出成型步骤：
将第一螺杆挤出机的挤出熔融物通过分配器后分配给三层叠加模头的上层和下层，将第二螺杆挤出机的挤出熔融物输送至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。
(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。
进一步的，通过控制高压氮气瓶或者高压二氧化碳气瓶的阀门开度，来控制氮气或二氧化碳进入到第二加料仓中的量，高压氮气瓶或高压二氧化碳气瓶中的液态氮或二氧化碳的排出量为30-50g/小时。
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。
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。
与现有技术相比，本发明的含有氮气球或者二氧化碳气体球的光扩散板在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，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，且在熔融状态下的中空微球中加入液态的氮气或者二氧化碳，当光扩散板变为常温时，液态的氮气或者二氧化碳完全汽化，中间层由原来的1.0-1.1g/cm3变为0.8-0.9g/cm3的密度，在体积不变的情况下，使得总质量相对于原有的光扩散板减轻20％。
附图说明
图1为具体实施方式的含有氮气球或者二氧化碳气体球的光扩散板的结构示意图。
主要元器件说明:
第一外表面层 1
中间层 2
第二外表面层 3
中空微球 4
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
如图1所示，为含有氮气球或者二氧化碳气体球的光扩散板的结构示意图。
具体实施例1
一种含有氮气球或者二氧化碳气体球的光扩散板，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：中间层2添加了中空微球4，中空微球4的主要成分为有机硅，中空微球4内部充有氮气或者二氧化碳气体，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。
所述通常情况下，第一外表层1、中间层2、第二外表层3的总厚度在1.0mm～2.5mm。优选的是，第一外表层1和第二外表层3的厚度和占总厚度的6％～7％。
所述第一外表层1和第二外表层3的材质中包含具有抗UV、抗静电、抗灰层、发泡等功能材料中的一种或多种。通常情况下，在母料中加入抗UV剂，可以使得光扩散板具有抗UV的效果；在母料中加入抗静电剂，可以使得光扩散板具有抗静电的作用；在母料中加入防尘剂，可以使得光扩散板具有防止灰尘的作用；在母料中加入发泡剂，可以使得光扩散板具有发泡的作用。
所述的抗UV剂包含苯甲酸类、二苯甲酮类、苯并三唑类、或部分受阻胺类中的至少一种。
所述的抗静电剂包含硫酸衍生物、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。
所述的中间层中包含有光扩散剂，所述的光扩散剂包含无机光扩散剂和有机光扩散剂中的一种或多种。具体的，所述的无机光扩散剂包含纳米硫酸钡，碳酸钙，二氧化硅等，所述的有机光扩散剂包含压克力型，苯乙烯型，丙烯酸型等。
所述中间层2的中空微球4的含量占中间层2的质量比为1％。
所述中空微球4的折射率为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。
所述中间层2的的密度是0.8g/cm3。
所述第一外表面层1和第二外表面层3的其中一层或者两层中加入中空微球4的，中空微球4中不含有氮气球或者二氧化碳气体，中空微球4的折射率为1，丰富了光在其中的折射路径。
本发明还公开了所述的含有氮气球或者二氧化碳气体球的光扩散板的合成方法，包括如下步骤：
(1)准备基材步骤：选用聚苯乙烯(PS)作为基材；
(2)制作光学母粒步骤：
选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中加入基材和粉剂进行混合，混合均匀后经过螺杆挤出机进行搅拌升温融化；
在第二加料仓中加入基材、中空微球和粉剂的混合物，其中空微球占第二加料仓中混合物的质量百分比为1％～2％；向第二加料仓的底部持续不断通入氮气和二氧化碳，并维持搅拌使得混合物混合均匀；混合均匀后将第二加料仓的混合物依次经过螺杆挤出机的动态混合段和静态混合段，实现混合和升温熔融过程；
所述粉剂混合物包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂；
(3)挤出成型步骤：
将第一螺杆挤出机的挤出熔融物通过分配器后分配给三层叠加模头的上层和下层，将第二螺杆挤出机的挤出熔融物输送至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。
(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。
进一步的，通过控制高压氮气瓶或者高压二氧化碳气瓶的阀门开度，来控制氮气或二氧化碳进入到第二加料仓中的量，高压氮气瓶或高压二氧化碳气瓶中的液态氮或二氧化碳的排出量为30-50g/小时。
所述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。
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。
与现有技术相比，本发明的含有氮气球或者二氧化碳气体球的光扩散板在中间层2中均加入质量百分比为1％的中空微球4，中空微球4的主要成分为有机硅，中空微球4的折射率为1，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；本发明的创新点在于在中间层中通过物理起泡的方式加入气体N 2或C0 2，使得N 2或C0 2气体能够均匀分散在中间层中。由于引入低折射率的N 2或C0 2气体球，可以有效增加中间层的折射效果，使得混光更加均匀，提升光扩散板性能。由于中间层引入N 2或C0 2气体球，使得中间层的密度由原来的1.0-1.1g/cm3降低为0.7-0.9g/cm3，在体积不变的情况下，使得中间层的质量减轻10％-30％，符合行业轻量化指标，增强了扩散板应用场景的可能性。
具体实施例2
一种含有氮气球或者二氧化碳气体球的光扩散板，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：中间层2添加了中空微球4，中空微球4的主要成分为有机硅，中空微球4内部充有氮气或者二氧化碳气体，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。
所述通常情况下，第一外表层1、中间层2、第二外表层3的总厚度在1.0mm～2.5mm。优选的是，第一外表层1和第二外表层3的厚度和占总厚度的6％～7％。
所述第一外表层1和第二外表层3的材质中包含具有抗UV、抗静电、抗灰层、发泡等功能材料中的一种或多种。通常情况下，在母料中加入抗UV剂，可以使得光扩散板具有抗UV的效果；在母料中加入抗静电剂，可以使得光扩散板具有抗静电的作用；在母料中加入防尘剂，可以使得光扩散板具有防止灰尘的作用；在母料中加入发泡剂，可以使得光扩散板具有发泡的作用。
所述的抗UV剂包含苯甲酸类、二苯甲酮类、苯并三唑类、或部分受阻胺类中的至少一种。
所述的抗静电剂包含硫酸衍生物、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。
所述的中间层中包含有光扩散剂，所述的光扩散剂包含无机光扩散剂和有机光扩散剂中的一种或多种。具体的，所述的无机光扩散剂包含纳米硫酸钡，碳酸钙，二氧化硅等，所述的有机光扩散剂包含压克力型，苯乙烯型，丙烯酸型等。
所述间层2的中空微球4的含量占中间层2的质量比为2％。
所述中空微球4的折射率为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。
所述中间层2的的密度是0.9g/cm3。
所述第一外表面层1和第二外表面层3的其中一层或者两层中加入中空微球4的，中空微球4中不含有氮气球或者二氧化碳气体，中空微球4的折射率为1，丰富了光在其中的折射路径。
本发明还公开了所述的含有氮气球或者二氧化碳气体球的光扩散板的合成方法，包括如下步骤：
(1)准备基材步骤：选用压克力(PMMA)作为基材；
(2)制作光学母粒步骤：
选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中加 入基材和粉剂进行混合，混合均匀后经过螺杆挤出机进行搅拌升温融化；
在第二加料仓中加入基材、中空微球和粉剂的混合物，其中空微球占第二加料仓中混合物的质量百分比为1％～2％；向第二加料仓的底部持续不断通入氮气和二氧化碳，并维持搅拌使得混合物混合均匀；混合均匀后将第二加料仓的混合物依次经过螺杆挤出机的动态混合段和静态混合段，实现混合和升温熔融过程；
所述粉剂混合物包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂；
(3)挤出成型步骤：
将第一螺杆挤出机的挤出熔融物通过分配器后分配给三层叠加模头的上层和下层，将第二螺杆挤出机的挤出熔融物输送至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。
(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。
进一步的，通过控制高压氮气瓶或者高压二氧化碳气瓶的阀门开度，来控制氮气或二氧化碳进入到第二加料仓中的量，高压氮气瓶或高压二氧化碳气瓶中的液态氮或二氧化碳的排出量为30-50g/小时。
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。
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。
与现有技术相比，本发明的含有氮气球或者二氧化碳气体球的光扩散板在中间层2中均加入质量百分比为2％的中空微球4，中空微球4的主要成分为有机硅，中空微球4的折射率为1，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；本发明的创新点在于在中间层中通过物理起泡的方式加入气体N 2或C0 2，使得N 2或C0 2气体能够均匀分散在中间层中。由于引入低折射率的N 2或C0 2气体球，可以有效增加中间层的折射效果，使得混光更加均匀，提升光扩散板性能。由于中间层引入N 2或C0 2气体球，使得中间层的密度由原来的1.0-1.1g/cm3降低为0.7-0.9g/cm3，在体积不变的情况下，使得中间层的质量减轻10％-30％，符合行业轻量化指标，增强了扩散板应用场景的可能性。
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。

Claims (10)

  1. 一种含有氮气球或者二氧化碳气体球的光扩散板，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)分包含上表面和下表面，所述的中间层(2)分包含上表面和下表面，所述的第二外表面层(3)分包含上表面和下表面，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：中间层(2)添加了中空微球(4)，中空微球(4)的主要成分包含有机硅，中空微球(4)内部充有氮气或者二氧化碳气体，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。
  2. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特征在于：第一外表层(1)、中间层(2)、第二外表层(3)的总厚度在1.0mm～2.5mm。
  3. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特征在于：第一外表层(1)和第二外表层(3)的材质中包含具有抗UV、抗静电、抗灰层、发泡等功能材料中的一种或多种。
  4. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特征在于：所述的抗UV剂包含苯甲酸类、二苯甲酮类、苯并三唑类、或部分受阻胺类中的至少一种。
  5. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特征在于：所述的抗静电剂包含硫酸衍生物、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。
  6. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特征在于：中间层(2)的中空微球(4)的含量占中间层(2)的质量比包含1％～2％。
  7. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特征在于：中空微球(4)的折射率包含1.0-1.02。
  8. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特 征在于：中空微球(4)的平均粒径包含1～20um，中间层(2)的的密度是0.8-0.9g/cm 3。
  9. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板，其特征在于：第一外表面层(1)和第二外表面层(3)的其中一层或者两层中加入中空微球(4)的，中空微球(4)中不含有氮气球或者二氧化碳气体，中空微球(4)的折射率包含1。
  10. 如权利要求1所述的含有氮气球或者二氧化碳气体球的光扩散板的合成方法，其特征在于：
    (1)准备基材步骤：选用聚苯乙烯(PS)、聚碳酸酯(PC)、聚乙烯(PE)、聚丙烯(PP)、聚氯乙烯(PVC)、聚对苯二甲酸乙二醇酯(PET)、压克力(PMMA)、丙烯酸(MMA)中的至少一种作为基材；
    (2)制作光学母粒步骤：选取两个加料仓，分别为第一加料仓和第二加料仓，在第一加料仓中加入基材和粉剂进行混合，混合均匀后经过螺杆挤出机进行搅拌升温融化；在第二加料仓中加入基材、中空微球和粉剂的混合物，其中空微球占第二加料仓中混合物的质量百分比为1％～2％；向第二加料仓的底部持续不断通入氮气和二氧化碳，并维持搅拌使得混合物混合均匀；混合均匀后将第二加料仓的混合物依次经过螺杆挤出机的动态混合段和静态混合段，实现混合和升温熔融过程；所述粉剂混合物包括扩散剂、抗UV剂、氧化剂、光稳定剂和润滑分散剂；
    (3)挤出成型步骤：将第一螺杆挤出机的挤出熔融物通过分配器后分配给三层叠加模头的上层和下层，将第二螺杆挤出机的挤出熔融物输送至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。
    (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。
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