DICHROIC POLARIZING FILM AND OPTICAL POLARIZER CONTAINING THE FILM,申请号WO1999US00466-传众专利搜索

DICHROIC POLARIZING FILM AND OPTICAL POLARIZER CONTAINING THE FILM

申请公布号：WO9936814(A1)

申请号：WO1999US00466

申请日期：1999.01.08

申请公布日期：1999.07.22

申请人：

MINNESOTA MINING AND MANUFACTURING COMPANY

发明人：KAUSCH, WILLIAM, L.;WILLIAMS, BRIAN, H.;MERRILL, WILLIAM, W.

分类号：C08J5/18;C08K3/02;C08L29/04;C08L39/06;C08L67/00;G02B5/30;(IPC1-7):G02B5/30;G02B1/08

主分类号：C08J5/18

摘要：<p>A dichroic polarizing film is made, for example, by first, dissolving polyvinyl alcohol and a second polymer such as polyvinyl pyrrolidone or a sulfonated polyester, in a solvent. The ratio of polyvinyl alcohol to second polymer is between about 5:1 to 100:1 by weight. The film is coated on a substrate, dried, and then stretched to orient at least a portion of the film. The film incorporates a dichroic dye material, such as iodine, to form a dichroic polarizer. This polarizer may be used in conjunction with a multilayer optical film, such as a reflective polarizer, to form an optical polarizer. The multilayer optical film may contain two or more sets of polyester films, where at least one of the sets is birefringent and orientable by stretching. The polyvinyl alcohol/second polymer film and the multilayer optical film may be simultaneously stretched to orient both polymer films.</p>