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Continuous production technology of polystyrene light guide plate and polystyrene light guide plate

A polystyrene, production process technology, applied in the direction of light guides, optics, optical components, etc., can solve problems such as difficulty in plasticizing and melting uniformly, poor dimensional stability of light guide plates, and affecting the display effect of liquid crystal display devices, etc., to reduce preparation And melt plasticization process, eliminate crystal point and yellowing phenomenon, ensure the effect of image quality display clarity

Active Publication Date: 2018-06-22
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 light guide plates are made of polymethyl methacrylate. However, due to the special chemical structure of polymethyl methacrylate, it is very fragile to moisture. Dimensional stability is poor, prone to bending, affecting the display effect of the liquid crystal display device
[0004] Now someone has developed a polystyrene light guide plate, which is processed by plasticizing polystyrene masterbatch, but it is difficult for polystyrene masterbatch to be plasticized and melted evenly during the plasticization process, and some polystyrene is plasticized. The process will be carbonized, so that not only there are crystal points formed by a small amount of insufficiently plasticized rigid material on the polystyrene light guide plate, but also the surface of the plate is yellowed due to the existence of partially carbonized polystyrene, resulting in uneven light emission and light transmission. The rate is poor, and the picture quality and clarity of the liquid crystal display device cannot be guaranteed

Method used

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  • Continuous production technology of polystyrene light guide plate and polystyrene light guide plate
  • Continuous production technology of polystyrene light guide plate and polystyrene light guide plate
  • Continuous production technology of polystyrene light guide plate and polystyrene light guide plate

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Effect test

Embodiment 1

[0064] This embodiment provides a polystyrene light guide plate prepared according to the following process, such as figure 1 Shown:

[0065] (a) adding styrene monomer into the reaction kettle 101 to carry out polymerization reaction, controlling the polymerization temperature to 120° C. to obtain a polystyrene melt with a number average molecular weight of 50,000;

[0066] (s) After the polystyrene melt is discharged from the reaction kettle 101, it is sequentially passed through the devolatilizer 102 and the filter 103 for devolatilization and filtration treatment, and then sent to the plate manufacturing process. And the oligomer component and the low boiling point component discharged from the devolatilizer 102 are first passed through the impurity separator 115 to separate and remove the oligomer component, and then the low boiling point component is delivered to the low component cooler 111 after cooling, continue to be discharged into the reactor 101 for recycling; in...

Embodiment 2

[0069] This embodiment provides a polystyrene light guide plate, which is prepared according to the following process:

[0070] (a) adding styrene monomer into the reaction kettle to carry out polymerization reaction, controlling the polymerization temperature to be 110° C., and obtaining a polystyrene melt with a number average molecular weight of 200,000;

[0071] (s) carry out devolatilization and filtration treatment by polystyrene melt through devolatilizer and filter successively, and continue to discharge the low-boiling point component that discharges from devolatilizer and buffer tank into the reactor for recycling;

[0072] (b) The filtered polystyrene melt is transported to the plate forming system at 230°C with heat preservation, and then passes through the first mixer, gear pump, second mixer, extrusion die, three-roll calender and water-cooled cooler , that is, a polystyrene light guide plate with a thickness of 2 mm was prepared. Among them, one calender roller...

Embodiment 3

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

[0075] (a) adding styrene monomer into the reaction kettle to carry out polymerization reaction, controlling the polymerization temperature to be 125° C., and obtaining a polystyrene melt with a number average molecular weight of 100,000;

[0076] (s) carry out devolatilization and filtration treatment by polystyrene melt through devolatilizer and filter successively, and continue to discharge the low-boiling point component that discharges from devolatilizer and buffer tank into the reactor for recycling;

[0077] (b) The filtered polystyrene melt is transported to the plate forming system at 220°C with heat preservation, and then passes through the first mixer, gear pump, second mixer, extrusion die, three-roll calender and water-cooled cooler in sequence , that is, a polystyrene light guide plate with a thickness of 2 mm was prepared. Among them, one cal...

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Abstract

The invention provides a continuous production technology of a polystyrene light guide plate and a polystyrene light guide plate and relates to the field of light guide plate production technologies.The continuous production technology comprises the following steps: first feeding styrene monomers into a reactor to carry out polymerization reaction and make polystyrene melt; and then, carrying outheat preservation on the polystyrene melt, conveying the polystyrene melt to a plate molding system, and processing the polystyrene melt into the polystyrene light guide plate through the plate molding system. The problem that the picture cleanliness of a liquid crystal display cannot be ensured as the existing light guide plate prepared by the heating melting plasticization of a polystyrene master batch has fish eyes due to the existence of trace defective materials not fully plasticized, and non-even light emitting and poor light transmittance are caused by the yellowing of the plate surface due to the existence of part of carbonized polystyrene is solved. The fish eye and yellowing phenomena of the plate surface due to the existence of the defective materials are eliminated, and a technical effect of ensuring the picture display cleanliness of the liquid crystal display device is realized.

Description

technical field [0001] The invention relates to the technical field of light guide plate production technology, in particular to a continuous polystyrene light guide plate production process and the polystyrene light guide 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. It is necessary to install a light source behind the device, and convert the line light source into a surface light source through a light guide plate. , so that the device can emit light evenly and display various clear picture quality. [0003] Most of the traditional light guide plates are made of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D11/00C08F112/08G02B6/00
CPCB29D11/00663C08F112/08G02B6/0033G02B6/0065
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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