Abstract: The present invention provides an interlayer film for a laminated glass which can suppress bubble formation and bubble growth in the laminated glass. An interlayer film 1 for a laminated glass includes a first layer 2 and a second layer 3 laminated on one face 2a of the first layer 2. Each of the first layer 2 and the second layer 3 contains a polyvinyl acetal resin and a plasticizer. In the case of measuring viscoelasticity of a resin film (glass transition temperature: Tg(° C.)) formed from the first layer 2 or a resin film (glass transition temperature: Tg(° C.)) formed with 100 parts by weight of the polyvinyl acetal resin contained in the first layer 2 and 60 parts by weight of a plasticizer of triethylene glycol di-2-ethylhexanoate (3GO), the resin film has an elastic modulus of G?(Tg+80) at (Tg+80)° C. and an elastic modulus of G?(Tg+30) at (Tg+30)° C., and provides a ratio (G?(Tg+80)/G?(Tg+30)) of 0.65 or higher.

Abstract: The present invention provides an interlayer film for a laminated glass which can suppress bubble formation and bubble growth in the laminated glass. An interlayer film 1 for a laminated glass includes a first layer 2 and a second layer 3 laminated on one face 2a of the first layer 2. Each of the first layer 2 and the second layer 3 contains a polyvinyl acetal resin and a plasticizer. In the case of measuring viscoelasticity of a resin film (glass transition temperature: Tg (° C.)) formed from the first layer 2 or a resin film (glass transition temperature: Tg (° C.)) formed with 100 parts by weight of the polyvinyl acetal resin contained in the first layer 2 and 60 parts by weight of a plasticizer of triethylene glycol di-2-ethylhexanoate (3GO), the resin film has an elastic modulus of G?(Tg+80) at (Tg+80)° C. and an elastic modulus of G?(Tg+30) at (Tg+30)° C., and provides a ratio (G?(Tg+80)/G?(Tg+30)) of 0.65 or higher.

Abstract: An interlayer film for a laminated glass includes a first layer, a second layer laminated on one face of the first layer. Each of the first layer and the second layer contains a polyvinyl acetal resin and a plasticizer. The hydroxyl content of the polyvinyl acetal resin in the first layer is lower than the hydroxyl content of the polyvinyl acetal resin in the second layer. The difference between the hydroxyl content of the polyvinyl acetal resin in the first layer and the hydroxyl content of the polyvinyl acetal resin in the second layer is at most 9.2 mol %. If the difference in the content is higher than 8.5 mol % and at most 9.2 mol %, a degree of acetylation of the polyvinyl acetal resin of the polyvinyl acetal resin in the first layer is at most 8 mol %.

Abstract: The present invention provides an intermediate film for laminated glass which can improve the sound-insulating property. The intermediate film for laminated glass according to the present invention has a layered structure including at least two layers, comprising: a first layer containing a polyvinyl acetal resin and a plasticizer; and a second layer positioned on a first surface of the first layer.

Abstract: The present invention provides an interlayer film for a laminated glass capable of suppressing bubble formation and bubble growth even if the laminated glass is exposed to relatively high temperatures for a long time. An interlayer film for a laminated glass according to the present invention includes a first layer and a second layer laminated on one face of the first layer, each of the first layer and the second layer contains a polyvinyl acetal resin and a plasticizer, and in the case of measuring the viscoelasticity of the first layer as a resin film (glass transition temperature: Tg(° C.)), or the viscoelasticity of a resin film (glass transition temperature: Tg(° C.)) containing 100 parts by weight the polyvinyl acetal resin in the first layer and 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, the resin film has an elastic modulus of G?(Tg+170) at (Tg+170)° C. and an elastic modulus of G?(Tg+30) at (Tg+30)° C., and provides a ratio (G?(Tg+170)/G?(Tg+30)) of 0.

Abstract: The present invention provides an interlayer film for a laminated glass which can suppress bubble formation and bubble growth in the laminated glass. An interlayer film for a laminated glass according to the present invention includes a first layer and a second layer laminated on one face of the first layer, each of the first layer and the second layer contains a polyvinyl acetal resin, contains a carboxylic acid-modified polyvinyl acetal resin, or contains both a polyvinyl acetal resin and a carboxylic acid-modified polyvinyl acetal resin, each of the first layer and the second layer contains a plasticizer, and when the first layer does not contain the carboxylic acid-modified polyvinyl acetal resin, the first layer contains a compound having a boron atom.

Abstract: The present invention aims to provide an intermediate film for laminated glass which, in the case of being used for constituting a laminated glass, enables to improve the sound-insulating property of a laminated glass to be obtained; and a laminated glass. The intermediate film 1 for laminated glass of the present invention comprises a first layer 2 which contains a polyvinyl acetal resin and a plasticizer and the degree of acetylation of the polyvinyl acetal resin contained in the first layer 2 exceeds 30 mol %; and The laminated glass of the present invention comprises first and second components for laminated glass, and the intermediate film 1 for laminated glass sandwiched between the first and second components for laminated glass.

Abstract: The present invention aims to provide an intermediate film for laminated glass which, in the case of being used for constituting a laminated glass, enables to improve the sound-insulating property in a high frequency range of the obtained laminated glass over a wide range of temperature; and a laminated glass. The intermediate film 1 for laminated glass of the present invention comprises a first layer 2 and a second layer 3 which is laminated on a first surface 2a of the first layer 2, each of the first and second layers 2 and 3 contains a polyvinyl acetal resin and a plasticizer, the absolute value of the difference between SP values of the polyvinyl acetal resin and the plasticizer contained in the first layer 2 is 0.5 or smaller, and the laminated glass of the present invention comprises first and second components for laminated glass and the intermediate layer 1 sandwiched between the first and second components for laminated glass.

Abstract: The present invention aims to provide an intermediate film for laminated glass which, in the case of being used for constituting a laminated glass, enables to improve the sound-insulating property in a high frequency range of the obtained laminated glass over a wide range of temperature. The intermediate film for laminated glass of the present invention 1 has a structure that a first layer 2, a second layer 3, and a third layer 4 are laminated in this order, each of the first, second, and third layers 2, 3, and 4 contains a polyvinyl acetal resin and a plasticizer, the hydroxy group content in the polyvinyl acetal resin contained in the first layer 2 is lower than each of the hydroxy group contents in the polyvinyl acetal resins contained in the second and third layers 3 and 4, and the ratio (T1/(T2+T3)) of the thickness (T1) of the first layer 2 to the total thickness (T2+T3) of the second and third layers 3 and 4 is 0.14 or lower.

Abstract: The present invention aims to provide an intermediate film for laminated glass which, in the case of being used for constituting a laminated glass, enables to improve the sound-insulating property of the obtained laminated glass, and a laminated glass. The intermediate film 1 for laminated glass of the present invention comprises a first layer 2 which contains a polyvinyl acetal resin and a plasticizer, and the polyvinyl acetal resin and the first plasticizer are a polyvinyl acetal resin and a first plasticizer which have a cloud point of 5° C. or lower when the cloud point is measured using a solution prepared by dissolving 8 parts by weight of the polyvinyl acetal resin in 100 parts by weight of the first plasticizer; and the laminated glass 11 of the present invention comprises first and second components for laminated glass, and the intermediate film 1 for laminated glass sandwiched between the first and second components for laminated glass.

Abstract: The present invention provides an interlayer film for laminated glass which can give a laminated glass with better sound insulation when used in the laminated glass. The present invention provides an interlayer film for laminated glass having a monolayer structure comprising only a first layer or a multilayer structure comprising at least two layers including a first layer and a second layer stacked at least on one face of the first layer, wherein the first layer contains a thermoplastic resin and a first plasticizer represented by the formula (1): and the interlayer film has a monolayer structure or a multilayer structure including at least two layers and includes the first layer further containing a second plasticizer that is a diester compound, or the interlayer film has a multilayer structure including at least two layers and includes the second layer containing a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %.

Abstract: The present invention provides an interlayer film for a laminated glass which can suppress bubble formation and bubble growth in the laminated glass, and an interlayer film for the laminated glass. An interlayer film for a laminated glass 1 includes a first layer 2, a second layer laminated on one face 2a of the first layer 2. Each of the first layer 3 and the second layer 3 contains a polyvinyl acetal resin and a plasticizer. The hydroxyl content of the polyvinyl acetal resin in the first layer 2 is lower than the hydroxyl content of the polyvinyl acetal resin in the second layer 3. The difference between the hydroxyl content of the polyvinyl acetal resin in the first layer 2 and the hydroxyl content of the polyvinyl acetal resin in the second layer 3 is at most 9.2 mol %. If the difference in the content is higher than 8.5 mol % and at most 9.2 mol %, a degree of acetylation of the polyvinyl acetal resin of the polyvinyl acetal resin in the first layer is at most 8 mol %.

Abstract: The present invention provides an interlayer film for a laminated glass which has excellent sound insulation and can suppress bubble formation and bubble growth in the laminated glass, and a multilayer interlayer film for the laminated glass including the interlayer film for a laminated glass. An interlayer film for a laminated glass 2 includes a thermoplastic resin and a plasticizer. The ratio of a high molecular weight component with an absolute molecular weight of 1000000 or more in the thermoplastic resin is 7.4% or higher, or the ratio of a high molecular weight component with a polystyrene-equivalent molecular weight of 1000000 or more in the thermoplastic resin is 9% or higher. A first multilayer interlayer film 1 for a laminated glass includes an interlayer film 2 for a laminated glass and an interlayer film 3 for a laminated glass that contains a thermoplastic resin and a plasticizer, and is laminated on one face 2a of the interlayer film 2 for a laminated glass.

Abstract: The present invention provides an interlayer film for a laminated glass which can suppress bubble formation and bubble growth in the laminated glass. An interlayer film 1 for a laminated glass includes a first layer 2 and a second layer 3 laminated on one face 2a of the first layer 2. Each of the first layer 2 and the second layer 3 contains a polyvinyl acetal resin and a plasticizer. The polyvinyl acetal resin in the first layer 2 is obtained by acetalizing a polyvinyl alcohol resin that has a degree of polymerization exceeding 3000.

Abstract: The present invention provides an interlayer film for a laminated glass which can suppress bubble formation and bubble growth in the laminated glass. An interlayer film 1 for a laminated glass includes a first layer 2 and a second layer 3 laminated on one face 2a of the first layer 2. Each of the first layer 2 and the second layer 3 contains a polyvinyl acetal resin and a plasticizer. In the case of measuring viscoelasticity of a resin film (glass transition temperature: Tg (° C.)) formed from the first layer 2 or a resin film (glass transition temperature: Tg (° C.)) formed with 100 parts by weight of the polyvinyl acetal resin contained in the first layer 2 and 60 parts by weight of a plasticizer of triethylene glycol di-2-ethylhexanoate (3GO) , the resin film has an elastic modulus of G?(Tg+80) at (Tg+80)° C. and an elastic modulus of G?(Tg+30) at (Tg+30)° C., and provides a ratio (G?(Tg+80)/G?(Tg+30)) of 0.65 or higher.