Polarizing lens, eyewear, and method for manufacturing polarizing lens

Abstract

A method for manufacturing a polarizing lens that includes a polarizing polyvinyl alcohol film arranged between two pieces of a lens base material. The method includes subjecting the polarizing lens to edging processing to prepare a polarizing lens where the polarizing polyvinyl alcohol film is exposed at least at a part of an edge surface of the lens, and applying hydrophobization treatment to the polarizing polyvinyl alcohol film exposed at the edge surface of the lens.

1 . A method comprising:
 subjecting a polarizing lens to edging processing, wherein the polarizing lens includes a polarizing polyvinyl alcohol film arranged between two pieces of a lens base material, and the polarizing polyvinyl alcohol film is exposed at least at a part of an edge surface of the lens; and   applying hydrophobization treatment to the polarizing polyvinyl alcohol film exposed at the edge surface of the lens.   
     
     
         2 . The method according to  claim 1 , wherein the hydrophobization treatment is applied after the edging processing. 
     
     
         3 . The method according to  claim 1 , wherein the hydrophobization treatment includes immersing the polarizing lens in a solution containing a hydrophobizing agent having a functional group that reacts with a hydroxyl group. 
     
     
         4 . The method according to  claim 3 , wherein the solution further includes a reaction catalyst, an acid, or a base. 
     
     
         5 . The method according to  claim 1 , wherein the hydrophobization treatment is performed by contacting the polarizing polyvinyl alcohol film exposed at the edge surface of the lens with a hydrophobizing agent having a functional group that reacts with a hydroxyl group. 
     
     
         6 . The method according to  claim 5 , wherein the hydrophobizing agent is a compound that reacts with polyvinyl alcohol via a reaction selected from the group consisting of a cross-linking reaction, a dehydration reaction, and a halogenation reaction. 
     
     
         7 . The method according to  claim 6 , wherein the hydrophobizing agent is a hydrogen halide. 
     
     
         8 . The method according to  claim 6 , wherein the hydrophobizing agent is at least one selected from the group consisting of an alcohol, a carboxylic acid, and a silanol. 
     
     
         9 . The method according to  claim 6 , wherein the hydrophobizing agent is a cross-linking agent. 
     
     
         10 . The method according to  claim 9 , wherein the cross-linking agent is aldehyde, and the cross-linking reaction is acetalization. 
     
     
         11 . The method according to  claim 10 , wherein the aldehyde is at least one selected from the group consisting of formaldehyde, acetaldehyde, glyoxal, and glutaraldehyde. 
     
     
         12 . The method according to  claim 11 , wherein the aldehyde is formaldehyde. 
     
     
         13 . The method according to  claim 10 , wherein the acetalization occurs in the presence of an acid. 
     
     
         14 . The method according to  claim 13 , further comprising, after the hydrophobization treatment, treating the polarizing lens with a base.