| 摘要 |
An epoxy optical sheet having a thickness of 500 mum or less, a high thickness accuracy, a small retardation and an excellent heat resistance; and a process by which the optical sheet can be efficiently produced. An epoxy optical sheet (8) comprises a hardened sheet (62) comprising an epoxy resin, and another resin layer (31) formed on one side thereof, wherein the sheet has a retardation of 5 nm or less, an average thickness of 500 mum or less, a thickness accuracy of ±10% or less and a glass transition temperature of 170° C. or above, and the sheet has a smooth surface; and a process for continuously producing the epoxy optical sheet (8), which comprises successively forming a strippable resin layer (31) on a support (1) having a smooth surface, successively spreading an epoxy resin coating solution (6) comprising an epoxy resin, a hardener, a hardening accelerator and a leveling agent on the resin layer in the form of a sheet, followed by hardening treatment, thereby forming a hardened sheet adhering to the resin layer; and, at the same time, recovering the hardened sheet together with the resin layer from the support.
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