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US 6,183,829 B2Granted
Process and apparatus for forming plastic sheet
AssigneeRohm and Haas Company
InventorsJeffrey Lawrence Daecher, Steven David Fields, Garo Khanarian, Alan Daniel Stein
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Abstract
Disclosed is an apparatus for formation of high quality plastic sheet in a continuous fashion. Also disclosed are a variety of optical and electronic display applications for high quality plastic sheet produced in a continuous fashion.
Claims16
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;
- and
- e) cooling said molten web to form a solid sheet;
- and
- wherein the sheet has a sheet waviness of less than or equal to 2.0μ.
8 more elements
Dependencies are inferred from the claim text.