Cellulose acetate films prepared by coating methods
AssigneeEastman Kodak Company
InventorMarcus Bermel
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Abstract
A method of film fabrication is taught that uses a coating and drying apparatus to fabricate resin films suitable for optical applications. In particular, cellulose acetate films are prepared by simultaneous application of multiple liquid layers to a moving carrier substrate. After solvent removal, the cellulose acetate films are peeled from the sacrificial carrier substrate. Cellulose acetate films prepared by the current invention exhibit good dimensional stability and low birefringence.
Claims29
-20. (canceled)
A composite film comprising:
- a cellulose aceteate film coated on a discontinuous carrier substrate, the cellulose acetate film having a thickness in the range of from about 1 to about 500 μm, the cellulose acetate film having an in-plane retardation that is less than 10 nm, the cellulose acetate film being adhered to the carrier substrate with an adhesive strength of less than about 250 N/m.
A cellulose acetate film made by the method of claim 1 wherein:
- the in-plane retardation is less than 10 nm.
A cellulose acetate film comprising:
- a layer of cellulose acetate formed by a coating operation, the cellulose acetate film having a thickness in the range of from about 1 to about 500 μm, the cellulose acetate film having an in-plane retardation that is less than 10 nm.
(canceled)
A display device including a cellulose acetate film therein made by the method of claim 1.
A cellulose acetate film comprising:
- a layer of cellulose, acetate formed by a coating operation, the cellulose acetate film having an in-plane retardation that is less than about 10 nm.
-42. (canceled)
An electronic display device having view screen comprising:
- a cellulose acetate film having an in-plane retardation that is less than about 5 nm.
An cellulose acetate film comprising:
- a coated layer of cellulose acetate having an in-plane retardation that is less than about 10 nm.
-48. (canceled)
-54. (canceled)
Dependencies are inferred from the claim text.