Polarizable compact

Abstract

A polarizable compact is provided with high productivity, which makes a polarizing sheet resistant to the occurrence of color unevenness and voids and also resistant to the occurrence of variations in polarization degree accompanying thermal shrinkage and the like of a protective layer (protective film). A polarizable compact is used for glasses. An injection-molded portion made of a transparent plastic material is thermally bonded to the concave surface side of a polarizing sheet having a predetermined curvature radius. The polarizing sheet has a polarizer layer held between first and second protective layers respectively serving as a convex surface side and a concave surface side. Both the first and second protective layers are formed from transparent films by a casting method with retardation (Re)≤50 nm. The transparent films for the first and second protective layers are respectively formed from an acylcellulose-based film and a polyamide-based film.

1 . A polarizable compact used for glasses, characterized in that an injection-molded portion formed from a transparent molding material is thermally bonded to a concave surface side of a polarizing sheet having a predetermined curvature radius, the polarizing sheet having a polarizer layer held between a first protective layer and a second protective layer respectively serving as a convex surface side and a concave surface side,
 the first protective layer and the second protective layer are formed from transparent films by a casting method with retardation (Re)≤50 nm, the transparent films of the first protective layer and the second protective layer being formed from an acylcellulose-based plastic film material and a polyamide-based plastic film material, respectively, and   the second protective layer is directly fused to the injection-molded portion.   
     
     
         2 . The polarizable compact according to  claim 1 , characterized in that the first protective layer is formed from the transparent film that is not stretched or oriented and has Re≤10 nm. 
     
     
         3 . The polarizable compact according to  claim 2 , characterized in that the film materials for the transparent films forming the first protective layer and the second protective layer each exhibit Abbe number (ν)≥44. 
     
     
         4 . The polarizable compact according to  claim 3 , characterized in that the film material for the first protective layer exhibits ν≥54 and has a higher Abbe number than the film material for the second protective layer. 
     
     
         5 . The polarizable compact according to  claim 1 , characterized in that the injection-molded portion is formed from a polyamide-based transparent molding material identical or akin to the film material for the second protective layer, and
 the transparent molding material exhibits ν≥44 and a density (ISO1183) of not more than 1.03 g/cm 3 .   
     
     
         6 . The polarizable compact according to claim  1 , characterized in that the polarizing sheet is inverted after being bent to a predetermined curvature by a bending process using thermal press forming. 
     
     
         7 . The polarizable compact according to  claim 6 , characterized in that the polarizing sheet after the bending process has Re≤50 nm. 
     
     
         8 . The polarizable compact according to  claim 1 , characterized in that a surface on at least one of sides of the polarizable compact is covered with a hard coat film, and the hard coat film is covered thereon with a functional surface treatment film including a vapor deposited film. 
     
     
         9 . The polarizable compact according to  claim 2 , characterized in that the injection-molded portion is formed from a polyamide-based transparent molding material identical or akin to the film material for the second protective layer, and
 the transparent molding material exhibits ν≥44 and a density (ISO1183) of not more than 1.03 g/cm 3 .   
     
     
         10 . The polarizable compact according to  claim 3 , characterized in that the injection-molded portion is formed from a polyamide-based transparent molding material identical or akin to the film material for the second protective layer, and
 the transparent molding material exhibits ν≥44 and a density (ISO1183) of not more than 1.03 g/cm 3 .   
     
     
         11 . The polarizable compact according to  claim 4 , characterized in that the injection-molded portion is formed from a polyamide-based transparent molding material identical or akin to the film material for the second protective layer, and
 the transparent molding material exhibits ν≥44 and a density (ISO1183) of not more than 1.03 g/cm 3 .   
     
     
         12 . The polarizable compact according to  claim 2 , characterized in that the polarizing sheet is inverted after being bent to a predetermined curvature by a bending process using thermal press forming. 
     
     
         13 . The polarizable compact according to  claim 3 , characterized in that the polarizing sheet is inverted after being bent to a predetermined curvature by a bending process using thermal press forming. 
     
     
         14 . The polarizable compact according to  claim 4 , characterized in that the polarizing sheet is inverted after being bent to a predetermined curvature by a bending process using thermal press forming. 
     
     
         15 . The polarizable compact according to  claim 5 , characterized in that the polarizing sheet is inverted after being bent to a predetermined curvature by a bending process using thermal press forming. 
     
     
         16 . The polarizable compact according to  claim 12 , characterized in that the polarizing sheet after the bending process has Re≤50 nm. 
     
     
         17 . The polarizable compact according to  claim 2 , characterized in that a surface on at least one of sides of the polarizable compact is covered with a hard coat film, and the hard coat film is covered thereon with a functional surface treatment film including a vapor deposited film. 
     
     
         18 . The polarizable compact according to  claim 3 , characterized in that a surface on at least one of sides of the polarizable compact is covered with a hard coat film, and the hard coat film is covered thereon with a functional surface treatment film including a vapor deposited film. 
     
     
         19 . The polarizable compact according to  claim 4 , characterized in that a surface on at least one of sides of the polarizable compact is covered with a hard coat film, and the hard coat film is covered thereon with a functional surface treatment film including a vapor deposited film. 
     
     
         20 . The polarizable compact according to  claim 5 , characterized in that a surface on at least one of sides of the polarizable compact is covered with a hard coat film, and the hard coat film is covered thereon with a functional surface treatment film including a vapor deposited film.