There is provided an interlayer film for laminated glass with which a low yellow index value, low excitation purity and high heat shielding properties can be achieved in spite of the thickness varying with places. The interlayer film for laminated glass according to the present invention has a two or more-layer structure, has a thickness of one end thinner than a thickness of the other end at the opposite side of the one end and includes a first layer containing a thermoplastic resin and a second layer containing a thermoplastic resin, the difference between the maximum thickness and the minimum thickness in the first layer is smaller than the difference between the maximum thickness and the minimum thickness in the second layer, and the first layer contains a heat shielding compound.

A polymer film comprising polyvinyl acetal and a laminated glass manufactured using the same are provided. At least one surface of the polymer film has a void volume (Vv) value at a material ratio of 10% ranging from 3 μm.sup.3/μm.sup.2 to 34.3 μm.sup.3/μm.sup.2, wherein the void volume (Vv) and material ratio are defined in accordance with ISO 25178-2:2012.

Resin compositions, layers, and interlayers comprising a poly(vinyl acetal) resin that includes residues of an aldehyde other than n-butyraldehyde are provided. Such compositions, layers, and interlayers can exhibit enhanced or optimized properties as compared to those formulated with comparable poly(vinyl n-butyral) resins.

An interlayer film for laminated glass has enhanced sound insulating properties at 30° 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≤115 and Z≤−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≥2 and Z≤−0.16Xa−0.2Y+59”.

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° C. or lower, and an elastic modulus of the first layer at 30° C. is 285,000 Pa or greater.

A film for laminating including an embossed surface, wherein the embossed surface includes a plurality of convex parts and a plurality of concave parts disposed between the plurality of convex parts, wherein each of the plurality of convex parts is surrounded by the plurality of concave parts and does not include a convex part, wherein each of the plurality of convex parts has an average area of 4.0 mm.sup.2 or less, wherein an absolute value of Skewness (Ssk) of the embossed surface is more than 0, and 1 or less, and wherein Ar of the embossed surface is 1.001 to 2, where Ar is calculated by the following Formula 1:

[00001]$\begin{array}{cc}\mathrm{Ar}=\frac{\mathrm{As}}{\mathrm{Ac}}& \left[\mathrm{Formula}1\right]\end{array}$ where, in the Formula 1, As is an average surface area of surface profiles of the plurality of convex parts comprised in a unit area (1 cm.sup.2) of the embossed surface and Ac is an average area occupied by the plurality of convex parts comprised in a unit area (1 cm.sup.2) of the embossed surface, is disclosed.

Resin compositions, layers, and interlayers comprising two or more thermoplastic polymers and at least one RI balancing agent for adjusting the refractive index of at least one of the resins or layers is provided. Such compositions, layers, and interlayers exhibit enhanced optical properties while retaining other properties, such as impact resistance and acoustic performance.

There is provided an interlayer film for laminated glass with which the rigidity of laminated glass can be enhanced, the sound insulating properties of laminated glass can be heightened and the recyclability of the interlayer film can be enhanced. The interlayer film for laminated glass according to the present invention includes a first layer and a second layer arranged on a first surface side of the first layer, the first layer contains a polyvinyl acetal resin and a second resin component, the second layer contains a polyvinyl acetal resin, the peak temperature of the loss tangent exhibited by the second resin component in the first layer is −30° C. or higher and 10° C. or lower, and the refractive index of the second resin component in the first layer is 1.47 or higher and 1.51 or lower.

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.

An interlayer structure having a cellulose ester layer for use in structural laminates is described herein. The cellulose ester layer provides rigidity and support to multilayer interlayers comprising an array of different layers. Due to the diverse properties of the cellulose ester layers, the present interlayers can be useful in producing structural laminates having high stiffness and which possess good optical clarity for a variety of applications, including outdoor structural applications.