申请人:Mochizuki Noriaki
                            
                            
                                公开号:US20140218797A1
                            
                            
                                公开(公告)日:2014-08-07
                            
                            [Object] A polarizing element and polarizing plate having improved optical properties and durability.
[Solution] A polarizing element characterized in comprising a polyvinyl alcohol resin film adsorbing at least one dichromatic pigment that is a compound represented by formula (I) or a salt thereof as a free acid, and being stretched, wherein the polyvinyl alcohol resin has a degree of polymerization of 5,000 to 10,000:
(wherein A represents a phenyl group or a naphthyl group having a substituent; R
1
-R
6
each independently represent a hydrogen atom, a hydroxyl group, a lower alkyl group, a lower alkoxy group, a sulfo group, or a lower alkoxy group having a sulfo group; X represents an amino group optionally having a substituent, a benzoylamino group optionally having a substituent, a phenylamino group optionally having a substituent, a phenylazo group optionally having a substituent, or a naphthotriazole group optionally having a substituent; and m represents 0 or 1).