CN113093320A - Light diffusion plate with high refractive index and synthesis method thereof - Google Patents
Light diffusion plate with high refractive index and synthesis method thereof Download PDFInfo
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Abstract
The invention provides a high refractive index light diffusion plate and a synthesis method thereof, which mainly comprises three layers, namely a first outer surface layer, a second outer surface layer and a middle layer, wherein the base materials of the three diffusion plates are the same, and functional particles in the first outer surface layer and the second outer surface layer are the same, so that the special functions of the surface layers, such as UV resistance, static resistance, foaming and the like, are improved; the invention has the innovation points that 1-2% of hollow microspheres by mass are added in the first outer surface layer, the second outer surface layer and the middle layer, the main component of the hollow microspheres is organic silicon, the refractive index of the hollow microspheres is 1, the refraction angle of light is enriched by introducing the light diffusant with the low refractive index angle, the possibility of the light passing through the refraction angles of different materials is increased, the direction of the light is changed more, the light mixing effect of a light source passing through the light diffusion plate is better, the light transmittance is greatly increased, most market requirements can be met, and the requirements and the development of TFT-LCD products are met.
Description
Technical Field
The invention relates to the field of photoelectric materials, in particular to a light diffusion plate with high refractive index and a synthesis method thereof.
Background
The light diffusion plate is widely applied to systems such as liquid crystal display, LED illumination and imaging at present, so that incident light is fully scattered, and a softer and more uniform illumination effect is realized. The light diffusion plate is formed by adding a light diffusing agent to a raw material in the production of a solid plate. The diffusant is uniformly distributed in the board, so that when light passes through the board, the light touches the diffusant particles to have the effects of reflection, refraction and scattering, and the light can uniformly penetrate through the board without exposing a light source, so that the change from a point light source to a surface light source is achieved. The LED backlight module is suitable for direct type LED television backlight modules and LED illumination, has high brightness and high diffusivity, and improves the diffusion effect of uniform light emission distribution of the backlight source.
The light diffusion plate is characterized in that light rays pass through a diffusion layer which takes PMMA/PC/PE/PS and the like as plastic base materials, and when the light rays encounter diffusion particles with different refractive indexes, multi-direction and multi-angle refraction, reflection and scattering phenomena can occur, so that an optical diffusion effect is obtained, and the refractive index of the existing optical-grade polystyrene is 1.51-1.52; the refractive index of the organic silicon particles is 1.42-1.45, the refractive index of the PMMA particles is 1.45-1.49, the refractive index of the titanium dioxide particles is 1.42-1.45, and whether an existing low-cost material can be found and the refractive index of the material is different from that of the existing low-cost material can be determined, so that light passes through different materials, the refraction angles are different, the light direction is changed, and the light transmittance is greatly increased when a light source passes through the light diffusion plate, so that the problem which needs to be solved at present is solved.
Disclosure of Invention
In view of the above, the present invention provides a high refractive index light diffuser plate and a method for synthesizing the same, which mainly includes three layers, namely a first outer surface layer, a second outer surface layer and an intermediate layer, wherein the three layers have the same base material, and the first outer surface layer and the second outer surface layer have the same functional particles, which are used to improve the special functions of the surface layers, such as UV resistance, static resistance, foaming, etc.; the invention has the innovation points that 1-2% of hollow microspheres by mass are added in the first outer surface layer, the second outer surface layer and the middle layer, the main component of the hollow microspheres is organic silicon, the refractive index of the hollow microspheres is 1, the refraction angle of light is enriched by introducing the light diffusant with the low refractive index angle, the possibility of the light passing through the refraction angles of different materials is increased, the direction of the light is changed more, the light mixing effect of a light source passing through the light diffusion plate is better, the light transmittance is greatly increased, most market requirements can be met, and the requirements and the development of TFT-LCD products are met.
A high index light diffuser plate, comprising: the composite plate comprises a first outer surface layer, a middle layer and a second outer surface layer, wherein the first outer surface layer is divided into an upper surface and a lower surface, 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 lower surface of the middle layer is combined with the upper surface of the second outer surface layer; the base materials of the first outer surface layer, the middle layer and the second outer surface layer are the same, and the method is characterized in that: the first outer surface layer, the middle layer and the second outer surface layer are all added with organic silicon particles, titanium dioxide particles and hollow microspheres, one or more of an anti-UV agent and an antistatic agent are added into the first outer surface layer and the second outer surface layer, and the main component of the hollow microspheres is organic silicon.
Further, the weight parts of the organic silicon particles, the titanium dioxide particles, the carbon dioxide particles and the hollow microspheres in each of the first outer surface layer, the middle layer and the second outer surface layer are the same, and the weight parts are respectively as follows: 90 to 95 percent of optical-grade polystyrene or PMMA particles, 1 to 2 percent of organic silicon particles, 1 to 2 percent of titanium dioxide particles, 1 to 2 percent of carbon dioxide particles and 1 to 2 percent of hollow microspheres.
Furthermore, the refractive index of the optical-grade polystyrene is 1.51-1.52; the refractive index of the organic silicon particles is 1.42-1.45, the refractive index of the 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 is 1.0-1.02.
Further, the average particle size of the hollow microspheres is 1-20 um, the pore diameter is not too large or too small, and light can uniformly contact with the hollow microspheres through the arrangement of the pore diameter range.
Further, one or more of materials having functions of UV resistance, antistatic property, etc. are contained in the first outer surface layer and the second outer surface layer. In general, the anti-UV agent is added into the base material, so that the light diffusion plate has an anti-UV effect, and the anti-yellowing effect of the product is increased; the antistatic agent is added into the base material, so that the light diffusion plate has an antistatic effect, and the product is not easy to be stained with dust.
Furthermore, the first outer surface layer and the second outer surface layer contain an anti-UV agent, the anti-UV agent contains at least one of benzoic acid, benzophenone, benzotriazole or partially hindered amine, and is uniformly dispersed in the first outer surface layer and the second outer surface layer, wherein the anti-UV agent accounts for 3% -5% of the total mass of the first outer surface layer and the second outer surface layer.
Furthermore, the first outer surface layer and the second outer surface layer contain antistatic agents, the antistatic agents contain at least one of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives, and are uniformly dispersed in the first outer surface layer and the second outer surface layer, and the antistatic agents account for 2% -6% of the total mass of the first outer surface layer and the second outer surface layer.
The invention also discloses a synthesis method of the light diffusion plate with high refractive index, which comprises the following steps:
(1) a step of preparing a base material: selecting optical-grade polystyrene particles or PMMA particles as a base material;
(2) the optical master batch manufacturing step:
selecting from the prepared substrates: selecting two feeding bins, namely a first feeding bin and a second feeding bin respectively, adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a mass percentage into the first feeding bin, uniformly stirring and mixing, putting into a first screw granulator, and melting into a slurry state;
adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a second feeding bin, uniformly stirring and mixing, then putting into a second screw granulator, and melting into slurry;
the powder comprises one or more of a dispersing agent, an anti-UV agent, an oxidant, a light stabilizer and a lubricating dispersant;
(3) an extrusion molding step:
the pulpiness melt extruded by the machine head of the first screw granulator is respectively conveyed to the upper layer and the lower layer of the three-layer superposed die head through a distributor, the pulpiness melt extruded by the machine head of the second screw granulator is conveyed to the middle layer of the three-layer superposed die head, the thicknesses of the upper layer, the middle layer and the lower layer of the three-layer superposed die can be adjusted at one time by controlling the extrusion rates of the first screw granulator and the second screw granulator and the distribution ratio of the distributor, the thickness of the upper layer, the middle layer and the lower layer of the three-layer superposed die head can be adjusted for the second time by adjusting the gap of the three-layer superposed die head, the discharge of the upper layer die head of the three-layer superposed die head forms the first outer surface layer of the diffusion plate, the discharge of the middle layer die head forms the middle layer of the diffusion plate, the discharge of the lower layer die head forms the second outer surface of the diffusion plate, and the first outer surface, the middle layer and the second outer surface of the diffusion plate are formed into a finished diffusion plate product through three-roller extension.
(4) Cooling and cutting:
and the diffusion plate after the three-roller rolling is conveyed forwards through a conveying belt, naturally cooled or cooled to room temperature through cooling liquid in the conveying process, and then cut to a proper finished product size.
Further, in the step of manufacturing the optical master batch, the granulation temperature in the twin-screw granulator is 160-220 ℃, and the granulation pressure is 4.5-13.5 Mpa.
Further, in the step of extrusion molding, the molding temperature of the plate in the extrusion molding machine is between 170 and 230 ℃, and the molding pressure of the plate is between 4.5 and 13.5 Mpa.
Compared with the prior art, the light diffusion plate with high haze and high light transmittance is made of simple materials which are easily available, and the consumption is relatively low, so that the cost of raw materials is relatively low. In addition, the refractive index of the hollow microspheres of the organic silicon in the intermediate layer is 1.0-1.02, the refractive index of the optical-grade polystyrene is 1.51-1.52, and the refractive index of the optical-grade polystyrene is 1.51-1.52; the refractive index of the organic silicon particles is 1.42-1.45, the refractive index of the PMMA particles is 1.45-1.49, the refractive index of the titanium dioxide particles is 1.42-1.45, light passes through different materials, and the refraction angles are different, so that the light direction is changed, the light transmittance is greatly increased when the light source passes through the light diffusion plate, most market requirements can be met, and the proliferation requirements and development of the energy-saving industry are met.
Drawings
Fig. 1 is a schematic structural view of a light diffuser plate with a high refractive index according to an embodiment.
Description of main components:
| a first |
1 |
| Intermediate layer | 2 |
| Second |
3 |
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4 |
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Fig. 1 is a schematic structural view of a light diffuser plate with a high refractive index.
Detailed description of the preferred embodiment 1
A high index light diffuser plate, comprising: the composite material comprises a first outer surface layer 1, a middle 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, the middle 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 middle layer 2 is combined with the lower surface of the first outer surface layer 1, and the lower surface of the middle 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 middle layer 2 and the second outer surface layer 3 are the same, and the method is 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, one or more of an anti-UV agent and an antistatic agent are added into the first outer surface layer 1 and the second outer surface layer 3, and the main component of the hollow microspheres 4 is organic silicon.
The weight parts of the organic silicon particles, the titanium dioxide particles, the carbon dioxide particles and the hollow microspheres 4 in each of the first outer surface layer 1, the middle layer 2 and the second outer surface layer 3 are the same, and the weight parts are respectively as follows: 90 to 95 percent of optical-grade polystyrene or PMMA particles, 1 to 2 percent of organic silicon particles, 1 to 2 percent of titanium dioxide particles, 1 to 2 percent of carbon dioxide particles and 1 to 2 percent of hollow microspheres 4.
The optical-grade polystyrene has a refractive index of 1.51; the refractive index of the silicone particles was 1.42, the refractive index of the PMMA particles was 1.45, the refractive index of the titanium dioxide particles was 1.42, and the refractive index of the hollow microspheres 4 was 1.0.
The average particle size of the hollow microspheres 4 is 1-20 um, the aperture is not too large or too small, and the light can be uniformly contacted with the hollow microspheres 4 through the arrangement of the aperture range.
The first outer surface layer 1 and the second outer surface layer 3 contain one or more materials with functions of UV resistance, static resistance and the like. In general, the anti-UV agent is added into the base material, so that the light diffusion plate has an anti-UV effect, and the anti-yellowing effect of the product is increased; the antistatic agent is added into the base material, so that the light diffusion plate has an antistatic effect, and the product is not easy to be stained with dust.
The first outer surface layer and the second outer surface layer contain an anti-UV agent, the anti-UV agent contains at least one of benzoic acid, benzophenone, benzotriazole or partially hindered amine, and is uniformly dispersed in the first outer surface layer and the second outer surface layer, wherein the anti-UV agent accounts for 3% -5% of the total mass of the first outer surface layer and the second outer surface layer.
The antistatic agent is at least one of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives, and is uniformly dispersed in the first outer surface layer and the second outer surface layer, wherein the antistatic agent accounts for 2-6% of the total mass of the first outer surface layer and the second outer surface layer.
The invention also discloses a synthesis method of the light diffusion plate with high refractive index, which comprises the following steps:
(1) a step of preparing a base material: selecting optical-grade polystyrene particles or PMMA particles as a base material;
(2) the optical master batch manufacturing step:
selecting from the prepared substrates: selecting two feeding bins, namely a first feeding bin and a second feeding bin respectively, adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a mass percentage into the first feeding bin, uniformly stirring and mixing, putting into a first screw granulator, and melting into a slurry state;
adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a second feeding bin, uniformly stirring and mixing, then putting into a second screw granulator, and melting into slurry;
the powder comprises one or more of a dispersing agent, an anti-UV agent, an oxidant, a light stabilizer and a lubricating dispersant;
(3) an extrusion molding step:
the pulpiness melt extruded by the machine head of the first screw granulator is respectively conveyed to the upper layer and the lower layer of the three-layer superposed die head through a distributor, the pulpiness melt extruded by the machine head of the second screw granulator is conveyed to the middle layer of the three-layer superposed die head, the thicknesses of the upper layer, the middle layer and the lower layer of the three-layer superposed die can be adjusted at one time by controlling the extrusion rates of the first screw granulator and the second screw granulator and the distribution ratio of the distributor, the thickness of the upper layer, the middle layer and the lower layer of the three-layer superposed die head can be adjusted for the second time by adjusting the gap of the three-layer superposed die head, the discharge of the upper layer die head of the three-layer superposed die head forms the first outer surface layer of the diffusion plate, the discharge of the middle layer die head forms the middle layer of the diffusion plate, the discharge of the lower layer die head forms the second outer surface of the diffusion plate, and the first outer surface, the middle layer and the second outer surface of the diffusion plate are formed into a finished diffusion plate product through three-roller extension.
(4) Cooling and cutting:
and the diffusion plate after the three-roller rolling is conveyed forwards through a conveying belt, naturally cooled or cooled to room temperature through cooling liquid in the conveying process, and then cut to a proper finished product size.
In the step of manufacturing the optical master batch, the granulation temperature in the double-screw granulator is 160-220 ℃, and the granulation pressure is 4.5-13.5 Mpa.
In the extrusion molding step, the molding temperature of the plate in the extrusion molding machine is between 170 and 230 ℃, and the molding pressure of the plate is between 4.5 and 13.5 MPa.
Specific example 2
A high index light diffuser plate, comprising: the composite material comprises a first outer surface layer 1, a middle 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, the middle 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 middle layer 2 is combined with the lower surface of the first outer surface layer 1, and the lower surface of the middle 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 middle layer 2 and the second outer surface layer 3 are the same, and the method is 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, one or more of an anti-UV agent and an antistatic agent are added into the first outer surface layer 1 and the second outer surface layer 3, and the main component of the hollow microspheres 4 is organic silicon.
The weight parts of the optical polystyrene, the organic silicon particles, the PMMA particles, the titanium dioxide particles, the carbon dioxide particles and the hollow microspheres 4 in each of the first outer surface layer 1, the middle layer 2 and the second outer surface layer 3 are the same, and the weight parts are respectively as follows: 90% of optical-grade polystyrene, 2% of organic silicon particles, 1% -2% of PMMA particles, 2% of titanium dioxide particles, 2% of carbon dioxide particles and 2% of hollow microspheres 4.
Further, the optical-grade polystyrene has a refractive index of 1.52; the refractive index of the silicone particles was 1.45, the refractive index of the PMMA particles was 1.49, the refractive index of the titanium dioxide particles was 1.45, and the refractive index of the hollow microspheres 4 was 1.02.
The average particle size of the hollow microspheres 4 is 1-20 um, the aperture is not too large or too small, and the light can be uniformly contacted with the hollow microspheres 4 through the arrangement of the aperture range.
The first outer surface layer 1 and the second outer surface layer 3 contain one or more materials with functions of UV resistance, static resistance and the like. In general, the anti-UV agent is added into the base material, so that the light diffusion plate has an anti-UV effect, and the anti-yellowing effect of the product is increased; the antistatic agent is added into the base material, so that the light diffusion plate has an antistatic effect, and the product is not easy to be stained with dust.
The first outer surface layer and the second outer surface layer contain an anti-UV agent, the anti-UV agent contains at least one of benzoic acid, benzophenone, benzotriazole or partially hindered amine, and is uniformly dispersed in the first outer surface layer and the second outer surface layer, wherein the anti-UV agent accounts for 3% -5% of the total mass of the first outer surface layer and the second outer surface layer.
The antistatic agent is at least one of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives, and is uniformly dispersed in the first outer surface layer and the second outer surface layer, wherein the antistatic agent accounts for 2-6% of the total mass of the first outer surface layer and the second outer surface layer.
The invention also discloses a synthesis method of the light diffusion plate with high refractive index, which comprises the following steps:
(1) a step of preparing a base material: selecting optical-grade polystyrene particles or PMMA particles as a base material;
(2) the optical master batch manufacturing step:
selecting from the prepared substrates: selecting two feeding bins, namely a first feeding bin and a second feeding bin respectively, adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a mass percentage into the first feeding bin, uniformly stirring and mixing, putting into a first screw granulator, and melting into a slurry state;
adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a second feeding bin, uniformly stirring and mixing, then putting into a second screw granulator, and melting into slurry;
the powder comprises one or more of a dispersing agent, an anti-UV agent, an oxidant, a light stabilizer and a lubricating dispersant;
(3) an extrusion molding step:
the pulpiness melt extruded by the machine head of the first screw granulator is respectively conveyed to the upper layer and the lower layer of the three-layer superposed die head through a distributor, the pulpiness melt extruded by the machine head of the second screw granulator is conveyed to the middle layer of the three-layer superposed die head, the thicknesses of the upper layer, the middle layer and the lower layer of the three-layer superposed die can be adjusted at one time by controlling the extrusion rates of the first screw granulator and the second screw granulator and the distribution ratio of the distributor, the thickness of the upper layer, the middle layer and the lower layer of the three-layer superposed die head can be adjusted for the second time by adjusting the gap of the three-layer superposed die head, the discharge of the upper layer die head of the three-layer superposed die head forms the first outer surface layer of the diffusion plate, the discharge of the middle layer die head forms the middle layer of the diffusion plate, the discharge of the lower layer die head forms the second outer surface of the diffusion plate, and the first outer surface, the middle layer and the second outer surface of the diffusion plate are formed into a finished diffusion plate product through three-roller extension.
(4) Cooling and cutting:
and the diffusion plate after the three-roller rolling is conveyed forwards through a conveying belt, naturally cooled or cooled to room temperature through cooling liquid in the conveying process, and then cut to a proper finished product size.
In the step of manufacturing the optical master batch, the granulation temperature in the double-screw granulator is 160-220 ℃, and the granulation pressure is 4.5-13.5 Mpa.
In the extrusion molding step, the molding temperature of the plate in the extrusion molding machine is between 170 and 230 ℃, and the molding pressure of the plate is between 4.5 and 13.5 MPa.
Compared with the prior art, the light diffusion plate with high haze and high light transmittance is made of simple materials which are easily available, and the consumption is relatively low, so that the cost of raw materials is relatively low. In addition, the refractive index of the hollow microspheres 4 of the organic silicon in the intermediate layer 2 is 1.02, the refractive index of the optical-grade polystyrene is 1.52, and the refractive index of the optical-grade polystyrene is 1.52; the refractive index of organosilicon particle is 1.45, the refractive index of PMMA particle is 1.49, the refractive index of titanium dioxide particle is 1.45, through introducing the light diffusant of low refractive index angle, the refraction angle of light has been richened, the probability of the refraction angle of light through different materials has been increased, more change the direction of light, it is better to mix the light effect when making the light source pass through the light diffuser plate, the luminousness greatly increased can satisfy most market demands, accord with TFT-LCD product's demand and development.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A high index light diffuser plate, comprising: the composite material comprises a first outer surface layer (1), a middle 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, the middle 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 middle layer (2) is combined with the lower surface of the first outer surface layer (1), and the lower surface of the middle 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 middle layer (2) and the second outer surface layer (3) are the same, and the method is characterized in that: organosilicon particles, titanium dioxide particles and hollow microspheres (4) are added into the first outer surface layer (1), the middle layer (2) and the second outer surface layer (3), one or more of an anti-UV agent and an antistatic agent are added into the first outer surface layer (1) and the second outer surface layer (3), and the main component of the hollow microspheres (4) is organosilicon.
2. The high-refractive-index light diffuser plate according to claim 1, wherein: the weight parts of the organic silicon particles, the titanium dioxide particles, the carbon dioxide particles and the hollow microspheres (4) in each of the first outer surface layer (1), the middle layer (2) and the second outer surface layer (3) are the same, and the weight parts are respectively as follows: 90 to 95 percent of optical-grade polystyrene or PMMA particles, 1 to 2 percent of organic silicon particles, 1 to 2 percent of titanium dioxide particles, 1 to 2 percent of carbon dioxide particles and 1 to 2 percent of hollow microspheres (4).
3. The high-refractive-index light diffuser plate according to claim 1, wherein: the refractive index of the optical-grade polystyrene is 1.51-1.52; the refractive index of the organic silicon particles is 1.42-1.45, the refractive index of the 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. The high-refractive-index light diffuser plate according to claim 1, wherein: the average particle size of the hollow microspheres (4) is 1-20 um.
5. The high-refractive-index light diffuser plate according to claim 1, wherein: the first outer surface layer (1) and the second outer surface layer (3) contain one or more of materials with functions of UV resistance, static resistance and the like.
6. The high-refractive-index light diffuser plate according to claim 1, wherein: the first outer surface layer and the second outer surface layer contain an anti-UV agent, the anti-UV agent is at least one of benzoic acid, benzophenone, benzotriazole or partially hindered amine, and is uniformly dispersed in the first outer surface layer and the second outer surface layer, wherein the anti-UV agent accounts for 3% -5% of the total mass of the first outer surface layer and the second outer surface layer.
7. The high-refractive-index light diffuser plate according to claim 1, wherein: the first outer surface layer and the second outer surface layer contain antistatic agents, the antistatic agents contain at least one of sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles and ethylene oxide derivatives, and are uniformly dispersed in the first outer surface layer and the second outer surface layer, and the antistatic agents account for 2% -6% of the total mass of the first outer surface layer and the second outer surface layer.
8. The method for synthesizing a light diffusion plate of high refractive index as claimed in claim 1, comprising the steps of:
(1) a step of preparing a base material: selecting optical-grade polystyrene particles or PMMA particles as a base material;
(2) the optical master batch manufacturing step: selecting from the prepared substrates: selecting two feeding bins, namely a first feeding bin and a second feeding bin respectively, adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a mass percentage into the first feeding bin, uniformly stirring and mixing, putting into a first screw granulator, and melting into a slurry state; adding a mixture of optical-grade polystyrene, 1% of organic silicon particles, 1% of PMMA particles, 1% of titanium dioxide particles, 1% of carbon dioxide particles, 1% of hollow microspheres 4 and powder in a second feeding bin, uniformly stirring and mixing, then putting into a second screw granulator, and melting into slurry; the powder comprises one or more of a dispersing agent, an anti-UV agent, an oxidant, a light stabilizer and a lubricating dispersant;
(3) an extrusion molding step: the pulpiness melt extruded by the machine head of the first screw granulator is respectively conveyed to the upper layer and the lower layer of the three-layer superposed die head through a distributor, the pulpiness melt extruded by the machine head of the second screw granulator is conveyed to the middle layer of the three-layer superposed die head, the thicknesses of the upper layer, the middle layer and the lower layer of the three-layer superposed die can be adjusted at one time by controlling the extrusion rates of the first screw granulator and the second screw granulator and the distribution ratio of the distributor, the thickness of the upper layer, the middle layer and the lower layer of the three-layer superposed die head can be adjusted for the second time by adjusting the gap of the three-layer superposed die head, the discharge of the upper layer die head of the three-layer superposed die head forms the first outer surface layer of the diffusion plate, the discharge of the middle layer die head forms the middle layer of the diffusion plate, the discharge of the lower layer die head forms the second outer surface of the diffusion plate, and the first outer surface, the middle layer and the second outer surface of the diffusion plate are formed into a finished diffusion plate product through three-roller extension.
(4) Cooling and cutting: and the diffusion plate after the three-roller rolling is conveyed forwards through a conveying belt, naturally cooled or cooled to room temperature through cooling liquid in the conveying process, and then cut to a proper finished product size.
9. A method of synthesizing a high refractive index light diffuser plate as recited in claim 8, wherein: in the step of manufacturing the optical master batch, the granulation temperature in the double-screw granulator is 160-220 ℃, and the granulation pressure is 4.5-13.5 Mpa.
10. A method of synthesizing a high refractive index light diffuser plate as recited in claim 8, wherein: in the extrusion molding step, the molding temperature of the plate in the extrusion molding machine is between 170 and 230 ℃, and the molding pressure of the plate is between 4.5 and 13.5 MPa.
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| CN202110434558.0A CN113093320A (en) | 2021-04-22 | 2021-04-22 | Light diffusion plate with high refractive index and synthesis method thereof |
| PCT/CN2021/090405 WO2022222169A1 (en) | 2021-04-22 | 2021-04-28 | Light diffusion plate having high refractive index and synthesis method therefor |
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