| abstract |
A flat plate made of a cycloolefin polymer comprising at least 30% by weight, based on the cyclopolefin polymer, of repeating units (A) having an alicyclic structure. The repeating units (A) comprises at least 30% by weight, based on the repeating units (A), of repeating units (A-i) having no norbornane structure. The cycloolefin polymer has a weight average molecular weight of 5,000 to 50,000. The flat plate is especially useful as a light guide plate. |