| 摘要 |
PURPOSE:To improve the polarizing characteristics, dimensional stability and tear resistance of a polarizing film by specifying the difference between the coefft. of orientation of polymer segments in all the amorphous regions of the film and the coefft. of orientation of dye molecules. CONSTITUTION:The difference (DELTAF) between the coefft. of orientation of polymer segments in all the amorphous regions of a polarizing film and the coefft. (>=0.75) of orientation of dye molecules is adjusted to >=0.15. In the film, highly oriented polymer segments forming amorphous regions having adsorbed dye molecules coexist with slightly oriented polymer segments forming amorphous regions in a well-balanced state. The film has >=100% elongation in the stretching direction, superior polarizing characteristics, dimensional stability and tear resistance. The film is obtd. by allowing a dichroic dye to be adsorbed on a hydrophilic polymer film at <=30 deg.C and by orienting the film by stretching in a water bath at <=20 deg.C, especially 0-15 deg.C. |
