Intermediate film for laminated glass, and laminated glass

Abstract

Provided is an interlayer film for laminated glass capable of effectively enhancing the sound insulating property at 6300 Hz while effectively preventing deterioration in sound insulating property at 3150 Hz in laminated glass. An interlayer film for laminated glass according to the present invention has a one-layer structure or a two or more-layer structure and includes a resin layer containing a resin and a plasticizer. The interlayer film has a resonance frequency X of 550 Hz or more and 740 Hz or less, a loss factor Y in a secondary mode of 0.35 or more, and satisfies a formula: Y>0.0008X−0.142 in a measurement of resonance frequency in a secondary mode in a damping test for laminated glass according to a central exciting method of laminated glass, when the laminated glass is obtained by arranging the interlayer film between two glass plates of 25 mm wide, 300 mm long and 2 mm thick.

1 . An interlayer film for laminated glass having a one-layer structure or a two or more-layer structure,
 the interlayer film including a resin layer containing a thermoplastic resin and a plasticizer, and   the interlayer film having a resonance frequency X of 550 Hz or more and 740 Hz or less, a loss factor Y in a secondary mode of 0.35 or more and 0.70 or less, and satisfying a formula: Y>0.0008X−0.142 in a measurement of resonance frequency in a secondary mode in a damping test for laminated glass according to a central exciting method of laminated glass, when the laminated glass is obtained by arranging the interlayer film between two glass plates of 25 mm wide, 300 mm long and 2 mm thick.   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . The interlayer film for laminated glass according to  claim 1 , wherein the thermoplastic resin is a thermoplastic elastomer. 
     
     
         5 . The interlayer film for laminated glass according to  claim 4 , wherein the thermoplastic elastomer is an aliphatic polyolefin. 
     
     
         6 . The interlayer film for laminated glass according to  claim 5 , wherein the aliphatic polyolefin is a saturated aliphatic polyolefin. 
     
     
         7 . The interlayer film for laminated glass according to  claim 1 , wherein the plasticizer is a plasticizer other than an organic ester plasticizer. 
     
     
         8 . The interlayer film for laminated glass according to  claim 1 , wherein the plasticizer is paraffin oil. 
     
     
         9 . The interlayer film for laminated glass according to  claim 1 , comprising:
 a first layer; and   a second layer arranged on a first surface side of the first layer.   
     
     
         10 . The interlayer film for laminated glass according to  claim 9 , wherein when an overall thickness of the interlayer film for laminated glass is T, the first layer has a thickness of 0.25T or less. 
     
     
         11 . The interlayer film for laminated glass according to  claim 9 , further comprising a third layer arranged on a second surface side opposite to the first surface side of the first layer. 
     
     
         12 . The interlayer film for laminated glass according to  claim 11 , wherein
 the second layer contains a thermoplastic resin and a plasticizer, and   the third layer contains a thermoplastic resin and a plasticizer.   
     
     
         13 . The interlayer film for laminated glass according to  claim 1 , which is used for obtaining laminated glass by being arranged between a first glass plate having a thickness of 1.8 mm or more and 3 mm or less, and a second glass plate. 
     
     
         14 . The interlayer film for laminated glass according to  claim 1 , wherein
 the interlayer film is used for obtaining laminated glass by being arranged between a first glass plate and a second glass plate, and   a total of a thickness of the first glass plate and a thickness of the second glass plate is 3.6 mm or more and 6 mm or less.   
     
     
         15 . A laminated glass comprising:
 a first lamination glass member;   a second lamination glass member; and   the interlayer film for laminated glass according to  claim 1 ,   the interlayer film for laminated glass being arranged between the first lamination glass member and the second lamination glass member.   
     
     
         16 . The interlayer film for laminated glass according to  claim 1 , wherein the thermoplastic resin is polystyrene, an ethylene-vinyl acetate copolymer resin, an ethylene-acrylic acid copolymer resin, a polyurethane resin, a polyvinyl alcohol resin, a polyvinyl acetate resin, a polyester resin or a (meth)acryl polymer. 
     
     
         17 . The interlayer film for laminated glass according to  claim 1 , wherein the thermoplastic resin is polystyrene, an ethylene-vinyl acetate copolymer resin, an ethylene-acrylic acid copolymer resin, a polyurethane resin, a polyvinyl alcohol resin, a polyvinyl acetate resin, or a polyester resin. 
     
     
         18 . The interlayer film for laminated glass according to  claim 1 , wherein the plasticizer of the resin layer is in a content of 10 parts by weight or more and 60 parts by weight or less relative to 100 parts by weight of the thermoplastic resin in the resin layer. 
     
     
         19 . The interlayer film for laminated glass according to  claim 1 , further comprising a metal salt selected from the group consisting of an alkali metal salt, an alkali earth metal salt, and a magnesium salt. 
     
     
         20 . The interlayer film for laminated glass according to  claim 1 , further comprising an oxidation inhibitor selected from the group consisting of a phenol-based oxidation inhibitor, a sulfur-based oxidation inhibitor, and a phosphorus-based oxidation inhibitor.