Polarizing film made of semicrystalline polyolefine
AssigneeDsm N.V.
InventorCornelis W. M. Bastiaansen
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Abstract
Process for the manufacture of a polarizing film by drawing a polymer film containing a dichroic dye at a temperature above the glass transition temperature of the polymer, the polymer film consisting mainly of a semicrystalline polyolefine and being drawn at a temperature below the crystalline melting point of the polyolefine, the dye being present in liquid form at that drawing temperature, and a polarizing dye-containing polyolefine film having a dichroic ratio of at least 15.
Claims3
Process for the manufacture of a polarizing film by drawing a polymer film containing a dichroic dye at a temperature above the glass transition temperature of the polymer, wherein the polymer film consists essentially of a semicrystalline polyolefin, said drawing is conducted at a temperature below the crystalline melting point of the polyolefin, and the dye in the film is present in the liquid state at that drawing temperature.
Dependencies are inferred from the claim text.