Sekisui Chemical Co., Ltd.

Yuuma Takeda

Tatsuya Iwamoto

Nami Minakuchi

Kohei Kani

Yuki Ishikawa

Kinryou Chou

Shinji Kawada

Jun Sasaki

Shingo Okazawa

Shougo Yoshida

Provided is an interlayer film for laminated glass capable of suppressing the generation of an optical strain in laminated glass, and enhancing the damping performance of laminated glass. An interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a one-layer or two or more-layer structure, and includes a first layer containing a resin, and when the interlayer film is arranged between two sheets of clear float glass having a thickness of 2.5 mm to obtain a laminated glass X with a size of 150 mm in length and 300 mm in width, and the obtained laminated glass X is subjected to a specific measurement of optical strain, an optical strain value is 3.00 or less, whereas when the interlayer film is arranged between two sheets of clear float glass having a thickness of 2.1 mm to obtain a laminated glass Y having a size of 950 mm in length and 1500 mm in width, and the obtained laminated glass Y is subjected to a specific measurement of damping ratio, a damping ratio at a resonance frequency of 50 Hz or more and 80 Hz or less is 5.0% or more.

Intermediate film for laminated glass, and laminated glass

An interlayer film for laminated glass has enhanced sound insulating properties at 30&#xb0; C., and includes first and second layers each containing a thermoplastic resin and a plasticizer. When an absolute value of a difference in cloud point using the thermoplastic resin and plasticizer in each of the first and second layers is Xa, and a content in parts by weight of the entire plasticizer in the interlayer film relative to 100 parts by weight of the entire thermoplastic resin in the interlayer film Z, the interlayer film satisfies the first constitution: 'Xa&#x2264;115 and Z&#x2264;&#x2212;0.16Xa+59' and/or the second constitution: 'the thermoplastic resin in the first layer is polyvinyl acetal resin, and when the acetylation degree on a mole percent basis of the polyvinyl acetal resin in the first layer is represented by Y, Y&#x2265;2 and Z&#x2264;&#x2212;0.16Xa&#x2212;0.2Y+59'.

Interlayer for laminated glass, and laminated glass

An interlayer film for laminated glass that has a one-layer structure or a two or more layer-structure includes a first layer containing a thermoplastic resin. The first layer may have a glass transition temperature of 10&#xb0; C. or lower and the inter layer film may have an equivalent stiffness of 2.4 MPa or greater at 25&#xb0; C.

Provided is an interlayer film for laminated glass that can improve bending rigidity and sound insulating properties of laminated glass and can inhibit the occurrence and growth of foam in the laminated glass. An interlayer film for laminated glass according to the present invention has a single-layer structure or a two or more-layer structure and includes a first layer containing a polyvinyl acetal resin and a plasticizer, in which a glass transition temperature of the first layer is 10&#xb0; C. or lower, and an elastic modulus of the first layer at 30&#xb0; C. is 285,000 Pa or greater.

An interlayer film for laminated glass includes a first layer containing a polyvinyl acetal resin and a plasticizer; and a second layer containing a polyvinyl acetal resin and a plasticizer, wherein the second layer is laminated on a first surface of the first layer, wherein a concentration of hydroxyl groups of the polyvinyl acetal resin in the first layer is different from a concentration of hydroxyl groups of the polyvinyl acetal resin in the second layer, and wherein at least one of the first layer, the second layer, or a portion of an interface between the first layer and the second layer contains a filler.

An interlayer film for laminated glass having a one-layer structure or a two or more-layer structure includes a first layer containing a polyvinyl acetal resin and a plasticizer, wherein the first layer further contains silica particles, and the ratio of a content of the silica particles in the first layer to a total content of the polyvinyl acetal resin and the plasticizer in the first layer is from 0.03 to 0.4.

An interlayer film for laminated glass that has one-layer structure or a two or more layer-structure includes a first layer containing a polyvinyl acetal resin and a plasticizer, wherein the first layer has a glass transition temperature of 10&#xb0; C. or lower, and has an elastic modulus of 285,000 Pa or greater at 30&#xb0; C.

An interlayer film for laminated glass includes a first layer containing thermoplastic resin and silica particles; and a second layer containing a thermoplastic resin, wherein the first layer has tan &#x3b4; of 0.8 or greater at 200&#xb0; C., and wherein the second layer is disposed on a first surface side of the first layer, and has a glass transition temperature higher than a glass transition temperature of the first layer.

An interlayer film for laminated glass that has a one-layer structure or a two or more layer-structure includes a first layer containing a thermoplastic resin, wherein the first layer has a glass transition temperature of 10&#xb0; C. or lower, and wherein the interlayer film has an equivalent stiffness of 2.4 MPa or greater at 25&#xb0; C.

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Shiga, Japan

Yuuma Takeda