Sheet stock for dichroic dye light-polarizing means

Claim 1

A LIGHT-POLARIZING FILM MATERIAL OF IMPROVED LIGHTPOLARIZING PROPERTIES INCLUDING A TRANSPARENT BASE LAYER HAVING A HIGH ORDER OF DIMENSIONAL STABILITY, AND AT LEAST A LAYER SUPERIMPOSED THEREUPON HAVING ITS MOLECULES SUBSTANTIALLY ORIENTED IN A GIVEN DIRECTION, SAID SUPERIMPOSED LAYER COMPRISING A TRANSPARENT, HIGH MOLECULAR WEIGHT, HYDROXYL-CONTAINING, VINYL POLMER, AT LEAST A DICHROIC DIRECT COTTON DYE, AND A DYE MORDANT IN THE FROM OF AN ORGANIC COMPOUND COMPRISING A BASIC NITROGEN-CONTAINING POLYAMIDE, THE MOLECULAR ORIENTATION OF SAID SUPERIMPOSED LAYER PROVIDING A HIGH AXIAL RATIO ESSENTIAL TO EFFECTIVE LIGHT POLARIZATION BUT THEREBY ALSO TENDING TO CAUSE A LESSENED DYE RECEPTIVITY, SAID DYE MORDANT HAVING AN AFFINITY FOR SAID DYE SUBSTANTIALLY COMPENSATING FOR SAID LESSENED DYE RECEPTIVITY AND PROVIDING SUBSTANTIAL INSOLUBILIZATION OF SAID DYE, THE COACTION OF SAID VINYL POLYMER, SAID DYE AND SAID DYE MORDANT PROVIDING A DYE DENSITY IN SAID FILM MATERIAL WHICH IS APPRECIABLY HIGHER THAN THAT OF A LIGHT-POLARIZING FILM MATERIAL COMPRISING A SIMILAR VINYL POLMER AND DYE, BUT WHICH IS DEVOID OF SAID DYE MORDANT.