Sekisui Chemical Co., Ltd.

Nami Minakuchi

Tatsuya Iwamoto

Yuuma Takeda

Daizou Ii

Yuji Uchimura

Kohei Kani

Jun Sasaki

There is provided an inter layer film for laminated glass with which the flexural rigidity of laminated glass can be enhanced. The interlayer film for laminated glass according to the present invention has a one-layer structure or a two or more-layer structure and is provided with a first layer containing a polyvinyl acetal resin and a plasticizer, and the half-value width of the hydroxyl group of the polyvinyl acetal resin contained in the first layer is less than or equal to 250 cmand the content of the plasticizer contained in the first layer relative to 100 parts by weight of the polyvinyl acetal resin contained in the first layer is greater than or equal to 5 parts by weight and less than 30 parts by weight, or the half-value width of the hydroxyl group of the polyvinyl acetal resin contained in the first layer is greater than 250 cm.

Interlayer 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.

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 obtained by mixing a first film material containing a first polyvinyl acetal resin and a second film material containing a second polyvinyl acetal resin and a plasticizer, and the absolute value of the difference between the content of the hydroxyl group of the first polyvinyl acetal resin and the content of the hydroxyl group of the second polyvinyl acetal resin contained together with the plasticizer in the second film material is less than or equal to 13% by mole.

Intermediate film for laminated glasses, method for producing intermediate film for laminated glasses, and laminated glass

There is provided an interlayer film for laminated glass with which the sound insulating properties in a high frequency area of 2000 Hz or more can be effectively enhanced. The interlayer film for laminated glass according to the present invention has a two or more-layer structure and is provided with a first layer containing a thermoplastic resin and a second layer containing a thermoplastic resin, the second layer is arranged on a first surface side of the first layer, and the interlayer film is provided with Constitution A: 'the glass transition temperature of the second layer being 32&#xb0; C. or more, the glass transition temperature of the first layer being lower than the glass transition temperature of the second layer, and the thickness of the interlayer film being more than 787 &#x3bc;m and 950 &#x3bc;m or less' or Constitution B: 'the glass transition temperature of the second layer being 25&#xb0; C. or more, the glass transition temperature of the first layer being lower than the glass transition temperature of the second layer, and the thickness of the interlayer film being more than 950 &#x3bc;m'.

There is provided an interlayer film for laminated glass with which the flexural rigidity of laminated glass can be enhanced and the sound insulating properties of laminated glass can be enhanced. The interlayer film for laminated glass according to the present invention includes first, second, and third layers containing a polyvinyl acetal resin and a plasticizer, the content of the hydroxyl group of the polyvinyl acetal resin in the first layer is lower than the content of the hydroxyl group of the polyvinyl acetal resin in each of the second and third layers, when absolute values of a difference between the content of the hydroxyl group of the polyvinyl acetal resin in the second and third layers and the content of the hydroxyl group of the polyvinyl acetal resin in the first layer are defined as XA and XB, respectively, each of the absolute values XA and XB is 9% by mole or more and 11% by mole or less, and when a content of the plasticizer in the interlayer film relative to 100 parts by weight of the polyvinyl acetal resin in the interlayer film is defined as Y, XA, XB, and Y satisfy the equations of Y&#x2264;&#x2212;1.68XA+56 and Y&#x2264;&#x2212;1.68XB+56.

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.

There is provided an interlayer film for laminated glass with which the flexural rigidity of laminated glass can be enhanced. The interlayer film for laminated glass according to the present invention has a one-layer structure or a two or more-layer structure and is provided with a first layer containing a polyvinyl acetal resin and a plasticizer, and the half-value width of the hydroxyl group of the polyvinyl acetal resin contained in the first layer is less than or equal to 250 cmand the content of the plasticizer contained in the first layer relative to 100 parts by weight of the polyvinyl acetal resin contained in the first layer is greater than or equal to 5 parts by weight and less than 30 parts by weight, or the half-value width of the hydroxyl group of the polyvinyl acetal resin contained in the first layer is greater than 250 cm.

There is provided an interlayer film for laminated glass with which the production efficiency of laminated glass can be heightened. The interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a one-layer structure or a two or more-layer structure and includes a first layer containing a thermoplastic resin, the softening point of the first layer is 60&#xb0; C. or more, the interlayer film has an MD direction and a TD direction, and with regard to thermal shrinkage ratios obtained when the first inside portion, the second inside portion and the central portion are heated for 20 minutes at 140&#xb0; C. respectively, all of the thermal shrinkage ratio MD1MAX, the thermal shrinkage ratio MD2MAX and the thermal shrinkage ratio MD3MAX are 45% or less.

There is provided an interlayer film for laminated glass with which the production efficiency of laminated glass can be heightened. The interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a one-layer structure or a two or more-layer structure and includes a first layer containing a thermoplastic resin, the softening point of the first layer is 60&#xb0; C. or more, the interlayer film has an MD direction and a TD direction, and with regard to thermal shrinkage ratios obtained when the first inside portion, the second inside portion and the central portion are heated for 2 minutes at 80&#xb0; C. respectively, all of the thermal shrinkage ratio MD1MAX, the thermal shrinkage ratio MD2MAX and the thermal shrinkage ratio MD3MAX are 18% or less.

An interlayer film for laminated glass includes first, second, and third layers containing a thermoplastic resin and a plasticizer. The cloud point of the first layer is lower than both the cloud point of the second layer and the cloud point of the third layer. Both the absolute value XA of a difference between the cloud point of the first layer and the cloud point of the second layer and the absolute value XB of a difference between the cloud point of the first layer and the cloud point of the third layer are 118&#xb0; C. or more, and when a content of the plasticizer in the interlayer film for laminated glass relative to 100 parts by weight of the thermoplastic resin in the interlayer film for laminated glass is defined as Y, Y&#x2264;&#x2212;0.16 XA+60 and Y&#x2264;&#x2212;0.16XB+60.

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Kouka, Japan

Nami Minakuchi