Interlayer for laminated glass, and laminated glass

Abstract

There is provided an interlayer film for laminated glass with which the transparency can be enhanced. The interlayer film for laminated glass according to the present invention is in a sea-island state having a sea-like dark part and a plurality of island-like bright parts to be identified when observed with a transmission electron microscope, a thermoplastic resin is contained in the dark part region and a thermoplastic resin is contained in the bright part region, and the arithmetic average value of major diameters of the bright parts is less than or equal to 400 nm or the median value of major diameters of the bright parts is less than or equal to 400 nm.

1 . An interlayer film for laminated glass, being in a sea-island state having a sea-like dark part and a plurality of island-like bright parts to be identified when observed with a transmission electron microscope; and
 a thermoplastic resin being contained in the dark part region and a thermoplastic resin being contained in the bright part region, and the arithmetic average value of major diameters of the bright parts being less than or equal to 400 nm or the median value of major diameters of the bright parts being less than or equal to 400 urn.   
     
     
         2 . The interlayer film for laminated glass according to  claim 1 , wherein the arithmetic average value of major diameters of the bright parts is greater than or equal to 50 nm and less than or equal to 400 nm or the median value of major diameters of the bright parts is greater than or equal to 50 nm and less than or equal to 400 nm. 
     
     
         3 . The interlayer film for laminated glass according to  claim 1 , wherein the thermoplastic resin contained in the dark part region and the thermoplastic resin contained in the bright part region are different from each other. 
     
     
         4 . The interlayer film for laminated glass according to  claim 1 , wherein the thermoplastic resin contained in the dark part region is a polyvinyl acetal resin and the thermoplastic resin contained in the bright part region is a polyvinyl acetal resin. 
     
     
         5 . The interlayer film for laminated glass according to  claim 4 , wherein the content ratio of the hydroxyl group of the polyvinyl acetal resin contained in the dark pan region is higher than the content ratio of the hydroxyl group of the polyvinyl acetal resin contained in the bright part region. 
     
     
         6 . The interlayer film for laminated glass according to  claim 4 , wherein the content ratio of the hydroxyl group of the polyvinyl acetal resin contained in the dark part region is greater than or equal to 25% by mole. 
     
     
         7 . (canceled) 
     
     
         8 . The interlayer film for laminated glass according to  claim 4 , wherein the content ratio of the hydroxyl group of the polyvinyl acetal resin contained in the bright part region is less than 25% by mole. 
     
     
         9 . The interlayer film for laminated glass according to  claim 1 , wherein the ratio of the area of the bright part region to the total of the area of the dark part region and the area of the bright part region is less than or equal to 7.8%. 
     
     
         10 . The interlayer film for laminated glass according, to  claim 9 , wherein the ratio of the area of the bright part region to the total of the area of the dark part region and the area of the bright part region is greater than or equal to 0.5% and less than or equal to 7.8%. 
     
     
         11 . The interlayer film for laminated glass according to  claim 1 , further comprising a plasticizer. 
     
     
         12 . The interlayer film for laminated glass according to  claim 1 , wherein the arithmetic average value of major diameters of the bright parts is greater than or equal to 50 am and less than or equal to 400 nm. 
     
     
         13 . The interlayer film for laminated glass according to  claim 1 , wherein the median value of major diameters of the bright parts is greater than or equal to 50 nm and less than or equal to 400 nm. 
     
     
         14 . Laminated glass, comprising:
 a. first laminated glass member,   a second laminated glass member; and   an interlayer film for laminated glass according to  claim 1 ,   wherein the interlayer film is arranged between the first laminated glass member and the second laminated glass member.