Patent ID: 6183829
Filing Date: 2001-02-06
Classification: B29C,B29L,C09K,Y10S,Y10T

Abstract:
An optical storage medium comprising one or more layers of high quality plastic sheet; a reflective or semireflective layer disposed on at least one side of the sheet; and optionally a protective layer disposed on at least one side of the sheet; wherein the plastic sheet is produced by the process comprising the steps of:a) providing molten plastic resin;b) directing the molten plastic resin to an overflow die having an inlet and an outlet;c) shaping the molten plastic resin into a molten web using said overflow die;d) guiding said molten web away from said overflow die; ande) cooling said molten web to form a solid sheet; andwherein the sheet has a sheet waviness of less than or equal to 2.0.mu..