Hydrolytically stabilized polarizer
AssigneeAmerican Hoechst Corporation
InventorsLawrence Bolt, Michael Smith, Ali Tavasolian
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Abstract
A polarizer having increased hydrolytic stability is produced by impregnating a polyvinyl alcohol film with an iodine containing composition and then subjecting the substrate to both concentrated infrared and ultraviolet radiation treatments.
Claims13
A process for producing a hydrolytically stabilized polarizer which comprises staining a polyvinyl alcohol film in a bath of an iodine containing composition and subjecting said film to concentrated sources of infrared and ultraviolet radiation, each of said radiation treatments being conducted for a period of time less than about one minute and in amounts sufficient to substantially increase the hydrolytic stability of the film.
Dependencies are inferred from the claim text.