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Production process of continuous polystyrene diffuser plate and polystyrene diffuser plate

A polystyrene, production process technology, applied in the field of diffusion plate production process, can solve the problems of affecting the display effect of the liquid crystal display device, affecting the luminous effect of the liquid crystal display device, and poor light scattering effect, so as to achieve good light scattering ability and eliminate Yellowing phenomenon, soft and uniform light output

Active Publication Date: 2020-05-05
天津仁泰新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional diffusion plates are made of polymethyl methacrylate. However, due to the special chemical structure of polymethyl methacrylate, it is very fragile to moisture. Poor stability, prone to bending, affecting the picture display effect of the liquid crystal display device
[0004] Now someone has developed a polystyrene diffusion plate, which is processed by physical mixing of polystyrene masterbatch and diffusion powder, followed by melt plasticization, extrusion and calendering. However, during the processing of polystyrene masterbatch, due to equipment Due to the limitations of the venue and the site, it is difficult to make the uniform distribution of the diffusion powder in the polystyrene resin and the complete melting and plasticization uniform, and some polystyrene will be carbonized during the melting and plasticization process, making the polystyrene resin produced There are not only crystal points formed by a small amount of insufficiently plasticized rigid material on the vinyl diffusion plate, but also yellow light due to the presence of carbonized polystyrene, which leads to poor light scattering effect and affects the soft and uniform luminous effect of the liquid crystal display device

Method used

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  • Production process of continuous polystyrene diffuser plate and polystyrene diffuser plate
  • Production process of continuous polystyrene diffuser plate and polystyrene diffuser plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment provides a modified polystyrene diffusion plate, which is prepared according to the following process, such as figure 1 Shown:

[0070] (a) Put the diffusion powder and styrene monomer into the reaction kettle 101 and mix them evenly, the mass ratio of the two is 0.2:100, carry out the polymerization reaction, control the polymerization temperature to 110°C, and obtain a homogeneous compound with a number average molecular weight of 50,000 Polystyrene melt distributed with diffusion powder, wherein the diffusion powder is silicon dioxide with a particle size of 8-10 μm;

[0071] (s) after the polystyrene melt that is uniformly distributed with the diffusion powder is discharged from the bottom of the reaction kettle 101, the devolatilizer 102 and the filter 103 are passed through the devolatilizer 102 and the filter 103 to carry out devolatilization and filtration treatment, and the low temperature discharged from the devolatilizer 102 The boiling point...

Embodiment 2

[0074] This embodiment provides a polystyrene diffusion plate, which is prepared according to the following process:

[0075] (a) Add diffusion powder and styrene monomer into the reactor and mix evenly, the mass ratio of the two is 1.2:100, carry out polymerization reaction, control the polymerization temperature to 160°C, and obtain a uniform distribution with a number average molecular weight of 200,000 Polystyrene melt with diffusing powder, wherein the diffusing powder is silicon dioxide with a particle size of 8-10 μm;

[0076] (s) Pass the polystyrene melt evenly distributed with diffusion powder through the devolatilizer and filter for devolatilization and filtration treatment, and continue to discharge the low components discharged from the devolatilizer and buffer tank into the reaction recycling in kettles;

[0077](b) The filtered polystyrene melt evenly distributed with diffusion powder is transported to the plate forming system at 250°C and then passed through t...

Embodiment 3

[0079] This embodiment provides a polystyrene diffusion plate, which is prepared according to the following process:

[0080] (a) Add the diffusion powder and styrene monomer into the reactor and mix them evenly. The mass ratio of the two is 0.6:100. Polymerize. Polystyrene melt with diffusing powder, wherein the diffusing powder is silicon dioxide with a particle size of 8-10 μm;

[0081] (s) Pass the polystyrene melt evenly distributed with diffusion powder through the devolatilizer and filter for devolatilization and filtration treatment, and continue to discharge the low components discharged from the devolatilizer and buffer tank into the reaction recycling in kettles;

[0082] (b) The filtered polystyrene melt evenly distributed with diffusion powder is transported to the plate forming system at 220°C and then passed through the first mixer, gear pump, second mixer, extrusion die, and three-roll calendering Machine and water-cooled cooler, that is, a polystyrene diffus...

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Abstract

The invention provides continuous polystyrene diffuser plate production technology, and a polystyrene diffuser plate, and belongs to the technical field of diffuser plate production. The continuous polystyrene diffuser plate production technology comprises following steps: styrene monomer and a diffusion powder are introduced into a reaction kettle for uniform mixing, and styrene polymerization iscarried out so as to obtain a polystyrene melt containing uniformly dispersed diffusion powder; the polystyrene melt containing uniformly dispersed diffusion powder is introduced into a sheet material moulding system through thermal insulation conveying. In the prior art, the polystyrene diffuser plate is prepared via heating melting plasticizing of polystyrene master batch with the diffusion powder, crystal points and partially carbonized polystyrene are left on the obtained polystyrene diffuser plate because of existing of unreacted materials on the polystyrene diffuser plate, and technicalproblems in the prior art that light penetration is uniform, and plate surface yellow light is generated are solved. The polystyrene diffuser plate is excellent in light scattering capacity, and softand uniform in light penetration; plate surface yellow light generation is avoided; a large amount of energy consumption is saved; and the production cost of the polystyrene diffuser plate is reduced.

Description

technical field [0001] The invention relates to the technical field of diffuser plate production technology, in particular to a continuous polystyrene diffuser plate production process and the polystyrene diffuser plate. Background technique [0002] As the industrial society develops into a highly information-based society, the importance of electronic display devices as a medium for displaying and transmitting various information is increasing. In particular, liquid crystal display devices combined with liquid crystal and semiconductor technology are widely used in various fields, but the liquid crystal itself of this liquid crystal display device cannot emit light, so it is necessary to install a light source behind the device, and diffuse the light from the light source through a diffuser plate. Make the LCD display soft and uniform light, display a variety of clear picture quality. [0003] Most of the traditional diffusion plates are made of polymethyl methacrylate. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/08C08F2/44C08K3/36
CPCC08F112/08C08K3/36C08K2201/003C08F2/44
Inventor 何爱平徐月宏邹若东吴敬标
Owner 天津仁泰新材料股份有限公司
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