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Resin extruded plate for optical use and method for manufacturing same

A manufacturing method and resin technology, applied in optics, optical components, nonlinear optics, etc., can solve problems such as irregular cut surfaces, inability to strictly remove chips, and high turnover costs, and achieve the effect of improving luminous efficiency

Inactive Publication Date: 2007-10-24
ASAHI KASEI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But any kind of device is very troublesome and not only expensive, but also has the following problems: 1) the blade of the shearing cutting machine is easy to become blunt, because the turnover cost of replacing the blade is large, 2) the laser cutting machine is especially for thicker In the case of the board, the cut surface is not uniform, and the molten resin mist is easy to adhere to the board, and the turnover cost is high due to the replacement of the reflector, 3) The cut surface of the water jet shear is not uniform, etc.
[0010] Although the method of cutting the resin board with a saw is the most suitable for safe and stable production, there is no method that can strictly remove the generated chips.
Even after the resin plate is cut, the chips attached to the surface protection film are blown off with compressed air through the nozzle, and it is difficult to remove about 0.1mm 2 Not only such fine chips, but also chips that have been blown away for a while may adhere to the surface protection film again
There are suction nozzles on the surface and back of the board to remove chips, and it is difficult to sufficiently absorb fine chips. If the suction is too strong, the board itself will also be sucked, hindering stable production.
[0011] There is also a method in which the protective film is thick enough to be, for example, more than 90 microns, so that even if chips are attached, no dents or scratches are produced on the surface of the board, but it is also difficult to completely prevent

Method used

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  • Resin extruded plate for optical use and method for manufacturing same
  • Resin extruded plate for optical use and method for manufacturing same
  • Resin extruded plate for optical use and method for manufacturing same

Examples

Experimental program
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Effect test

Embodiment 1

[0070] A mixture of 50 parts by weight of polymer-A and 50 parts by weight of polymer-B (calculated as 100 parts by weight) is supplied to 1) the raw material funnel of Figure 4, and the temperature of the barrel is adjusted to 210°C from one side of the funnel to the side of the mold using , 210, 240, 250, 260, 260°C 150mmφ single-screw extruder 2) for melting, with an output of 780kg / hour and a resin temperature of 281°C from a die width of 1250mm and a die opening of 10mm 3)T Die extrusion, pass between four 4) polished rollers placed horizontally (the temperature is 89, 94, 95, 95°C in sequence), and the extruded plate on the 5) guide roller is cooled while being pulled by the 6) traction roller . The air temperature around the extrusion line was 49°C. In order to cool the inside and outside of the board, fans and air blowing devices are installed above and below the guide rollers, and by adjusting the temperature distribution in the center and end of the board and the in...

Embodiment 2

[0076] A resin extruded sheet B was obtained in the same manner as in Example 1, except that the swarf suction brush roller was not used, and the swarf was sucked and removed by sandwiching the sheet between two upper and lower adhesive rollers. Table 1 shows the measurement results of dents or bruises, chips, bright spots, and brightness.

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Abstract

Disclosed is a resin extruded plate for light guide plates which is suitable for displays used in office automation equipment such as personal computers and word processors, various monitors for displaying image signals such as panel monitors and television monitors as well as displays or advertising displays used in illuminating devices for indoor or outdoor spaces. Specifically disclosed is a resin extruded plate which is characterized in that it comprises surface protection films bonded to both sides of a plate having a thickness of 2-15 mm, there is no cutting dust having a size of 0.1 mm<2> or more on the films, and there is no recess and / or dent having a size of 0.1 mm<2> or more in the plate surface. Also disclosed is a method for manufacturing such a resin extruded plate.

Description

technical field [0001] The present invention relates to a resin extruded plate suitable for a light guide plate, which is suitable for notebook or desktop personal computers, portable information terminals, game machines, workstations, image monitors, or display devices such as televisions In liquid crystal displays, it is used in a backlight device that illuminates liquid crystal from the back. The present invention also relates to a method for producing a resin extruded plate suitable for a light guide plate suitable for producing a backlight device that does not impair the brightness and picture quality of a liquid crystal display. Background technique [0002] As information and image display devices, CRTs, so-called cathode ray tubes, have been used for a long time in the past, but in recent years, liquid crystal displays have gradually begun to be used instead of cathode ray tubes to meet the needs of thinner and smaller display devices. For liquid crystal displays, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/04B29K33/00B26D7/18B29K45/00G02B6/00B29K69/00G02F1/13357B29L7/00F21V8/00B29C48/07B29C48/08B29C48/16B29C48/305G02F1/1335
CPCB29C47/0019G02B6/0065B29C47/04B29C47/0021B29C48/07B29C48/08B29C48/16
Inventor 鹤田严一神谷俊儿
Owner ASAHI KASEI CHEM CORP