| 摘要 |
A resin extruded plate for light guide plate suitable for a display employed in office automation apparatuses, e.g. a personal computer and a word processor, various monitors for displaying an image signal, e.g. a panel monitor and a television monitor, and for a display or a signboard employed in an indoor and outdoor illuminators, and its production method. The resin extruded plate has a thickness of 2-15 mm wherein floating of four corners and four sides is 0.5 mm or less when a plate having a size of 1000×1000 mm is placed on a lapping plate, 0.2 mm or less when a sample produced by cutting the plate into a piece having a size of 330 mm in the width direction and 280 mm in the extruding direction is placed on the lapping plate, and 0.3 mm or less when the sample is stood in an oven with the long side at the bottom, heated at 90°C for 60 min, taken out from the oven and left standing, as it is, for 4 hours at room temperature and then placed on the lapping plate. The method for producing such resin extruded plate is also provided. |
