Polarizing sheet and polarizing lens provided with same

Abstract

Provided is a polarizing sheet that can precisely impart a desired curved shape without causing whitening when bending is carried out. A polarizing sheet of an embodiment of the present invention having a structure in which a polyamide resin film (1), a polarizing film, and a polyamide resin film (2) are laminated in this order, wherein a retardation value of the polyamide resin film (1) is from 10 to 3000 nm, and the retardation value of the polyamide resin film (1) and a retardation value of the polyamide resin film (2) satisfy Formula (r): [Retardation Value of Polyamide Resin Film (1)]−[Retardation Value of Polyamide Resin Film (2)]≥10 nm  (r).

1 . A polarizing sheet comprising a polyamide resin film (1), a polarizing film and a polyamide resin film (2), the polarizing sheet having a structure in which the polyamide resin film (1), the polarizing film and the polyamide resin film (2) are laminated in this order, wherein a retardation value of the polyamide resin film (1) is from 10 to 3000 nm, and the retardation value of the polyamide resin film (1) and a retardation value of the polyamide resin film (2) satisfy Formula (r):
   [Retardation Value of Polyamide Resin Film (1)]−[Retardation Value of Polyamide Resin Film (2)]≥10 nm  (r)
   
     
     
         2 . The polarizing sheet according to  claim 1 , wherein a thickness of the polyamide resin film (2) is from 10 to 2000 μm. 
     
     
         3 . The polarizing sheet according to  claim 1 , wherein a polyamide resin composing the film (1) is an alicyclic polyamide resin. 
     
     
         4 . The polarizing sheet according to  claim 3 , wherein the alicyclic polyamide resin has a repeating unit represented by Formula (ad) below: 
       
         
           
           
               
               
           
         
         where X represents a single bond or a divalent hydrocarbon group, L represents a divalent hydrocarbon group, R 1  and R 2  each represent an alkyl group, and m and n each represent an integer from 0 to 4. 
       
     
     
         5 . The polarizing sheet according to  claim 1 , wherein the polarizing sheet has a curved shape. 
     
     
         6 . A polarizing lens comprising a structure in which a polyamide resin-molded layer is laminated on a surface of the polyamide resin film (2) of the polarizing sheet described in  claim 1 . 
     
     
         7 . Spectacles comprising a polarizing lens described in  claim 6 . 
     
     
         8 . The polarizing sheet according to  claim 1 , wherein a polyamide resin composing the film (1) is a polycondensation product of a compound represented by Formula (a) and a compound represented by Formula (c) below;
   H 2 N-L 1 -NH 2   (a)
   where L 1  is a substituent obtained by removing two hydrogen atoms from a ring selected from the group consisting of a cycloalkene, crosslinking ring, and a linked ring
 where the linked ring has a structure in which two or more rings selected from the group consisting of the cycloalkene rings and the crosslinking rings are bonded through a single bond or a linking group
   HOOC-L 2 -COOH  (c)
 
 
   Where L 2  is a straight-chain or branched alkylene group having from 1 to 20 carbons or a straight-chain or branched alkenylene group having from 2 to 20 carbons.   
     
     
         9 . The polarizing sheet according to  claim 1 , wherein a melting temperature or a glass transition temperature of the polyamide resin is from 100 to 350° C. 
     
     
         10 . The polarizing sheet according to  claim 1 , wherein a polyamide resin composing the film (1) is a polycondensation product of a compound represented by Formula (a) and a compound represented by Formula (c) below,
   H 2 N-L 1 -NH 2   (a)
   where L 1  is a substituent obtained by removing two hydrogen atoms from a ring selected from the group consisting of a cycloalkene, crosslinking ring, and a linked ring
 where the linked ring has a structure in which two or more rings selected from the group consisting of the cycloalkene rings and the crosslinking rings are bonded through a single bond or a linking group
   HOOC-L 2 -COOH  (c)
 
 
   Where L 2  is a straight-chain or branched alkylene group having from 1 to 20 carbons or a straight-chain or branched alkenylene group having from 2 to 20 carbons.   and a melting temperature or a glass transition temperature of the polyamide resin is from 100 to 350° C.   
     
     
         11 . The polarizing sheet according to  claim 1 , wherein the retardation value of the polyamide resin film (1) is from 1000 to 3000 nm. 
     
     
         12 . The polarizing sheet according to  claim 1 , the retardation value of the polyamide resin film (2) is from 0 to 500 nm. 
     
     
         13 . The polarizing sheet according to  claim 1 , wherein the retardation value of the polyamide resin film (1) is from 1000 to 3000 nm, and the retardation value of the polyamide resin film (2) is from 0 to 500 nm. 
     
     
         14 . A method for producing a polarizing sheet, the method comprising using a sheet having a structure in which the polyamide resin film (1), the polarizing film, and the polyamide resin film (2) are laminated in this order, wherein a retardation value of the polyamide resin film (1) is from 10 to 3000 nm, and the retardation value of the polyamide resin film (1) and a retardation value of the polyamide resin film (2) satisfy Formula (r):
   [Retardation Value of Polyamide Resin Film (1)]−[Retardation Value of Polyamide Resin Film (2)]≥10 nm  (r)
   
     
     
         15 . The method for producing a polarizing sheet according to  claim 14 , wherein a melting temperature or a glass transition temperature of the polyamide resin is from 100 to 350° C. 
     
     
         16 . The method for producing a polarizing sheet according to  claim 14 , wherein the polyamide resin composing the film (1) is a polycondensation product of a compound represented by Formula (a) and a compound represented by Formula (c) below,
   H 2 N-L 1 -NH 2   (a)
   where L 1  is a substituent obtained by removing two hydrogen atoms from a ring selected from the group consisting of a cycloalkene, crosslinking ring, and a linked ring
 where the linked ring has a structure in which two or more rings selected from the group consisting of the cycloalkene rings and the crosslinking rings are bonded through a single bond or a linking group
   HOOC-L 2 -COOH  (c)
 
 
   Where L 2  is a straight-chain or branched alkylene group having from 1 to 20 carbons or a straight-chain or branched alkenylene group having from 2 to 20 carbons.   and a melting temperature or a glass transition temperature of the polyamide resin is from 100 to 350° C.   
     
     
         17 . The method for producing a polarizing sheet according to  claim 14 , the retardation value of the polyamide resin film (2) is from 0 to 500 nm. 
     
     
         18 . The method for producing a polarizing sheet according to  claim 14 , wherein the retardation value of the polyamide resin film (1) is from 1000 to 3000 nm, and the retardation value of the polyamide resin film (2) is from 0 to 500 nm. 
     
     
         19 . The spectacles according to  claim 7 , wherein the spectacles are at least a pair of spectacles, sunglasses, and goggles.