The present invention aims to provide an interlayer film for a laminated glass which enables production of a laminated glass with suppressed occurrence of optical distortion, a method for producing the interlayer film for a laminated glass, and a laminated glass produced using the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass produced by an extrusion lip embossing method utilizing melt fracture, the interlayer film for a laminated glass including a laminate that includes two or more resin layers in a stack and having a large number of protrusions and recesses on at least one surface, a maximum height Ry (m) and an average interval Sm (m) of the protrusions and recesses measured in conformity with JIS B 0601 (1994) on the surface with protrusions and recesses satisfying a formula (1):
(RySm)/23,500(1).

A multilayer laminating film contains at least one first and one second layer of plasticized polyvinyl acetal, wherein the first layer comprises a first plasticizer and a first polyvinyl acetal with a degree of acetalization of 75.1-84.0 mol % and a molar ratio of continuous sequences of vinyl alcohol groups with 5 members with a stereochemical sequence of rrrr of more than 0.23 based on the total amount of continuous syndiotactic sequences of vinyl alcohol groups with 3 members in the polyvinyl acetal, and the second layer comprises a second plasticizer and a second polyvinyl acetal with a degree of acetalization of 60-84 mol %.

The present invention aims to provide an interlayer film for a laminated glass that adheres sufficiently to glass at peripheral portions of the glass to prevent occurrence of a sealing failure at the peripheral portions and also to contribute to improved production efficiency of laminated glass in production of laminated glass, even when having a thickness at the thickest portion of 850 m or more, and a laminated glass produced using the interlayer film for a laminated glass. Provided is an interlayer film for a laminated glass having a large number of recesses on at least one surface, the interlayer film for a laminated glass having a thickness T (m) measured in conformity with JIS K-6732 (1996) and a maximum height roughness Ry (m) measured in conformity with JIS B-0601 (1994) at a thickest portion, the thickness T and the maximum height roughness Ry satisfying the following expressions (1) and (1):

Ry0.0195T+33.2(1),

T850(1).

Embodiments relate to a resin film for laminated glass, laminated glass comprising the resin film, and a process for manufacturing the laminated glass. The resin film for laminated glass comprises a resin layer comprising a polyvinyl acetal resin and a contact surface in direct contact with glass, wherein the contact surface has an Rz roughness of 25 to 90 m and a maximum static friction coefficient at 20 C. of 0.85 to 1.60, and the compressive elastic deformation index measured in the perpendicular direction from the contact surface at 35 C. is 40 to 310 m/N.

There is provided an interlayer film for laminated glass with which an air bubble can be made difficult to be left behind between a lamination glass member and the interlayer film when laminated glass is obtained. The interlayer film for laminated glass according to the present invention contains a thermoplastic resin and has a portion where the amount of increase in the thickness is increased in a direction from one end to the other end in the region where the thickness is increased, has a portion where the amount of increase in the thickness is decreased in a direction from one end to the other end in the region where the thickness is increased, has a portion where the wedge angle is increased in a direction from one end to the other end in the region where the sectional shape in the thickness direction is a wedge-like shape, or has a portion where the wedge angle is decreased in a direction from one end to the other end in the region where the sectional shape in the thickness direction is a wedge-like shape, and the ten-point average roughness Rz of the surface at a center position of the portion where the amount of increase in the thickness is increased, the portion where the amount of increase in the thickness is decreased, the portion where the wedge angle is increased, or the portion where the wedge angle is decreased is 20 m or more.

The present invention aims to provide an interlayer film for a laminated glass which enables production of a laminated glass with suppressed occurrence of optical distortion, a method for producing the interlayer film for a laminated glass, and a laminated glass produced using the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass produced by an extrusion lip embossing method utilizing melt fracture, the interlayer film for a laminated glass including a laminate that includes two or more resin layers in a stack and having a large number of protrusions and recesses on at least one surface, a maximum height Ry (m) and an average interval Sm (m) of the protrusions and recesses measured in conformity with JIS B 0601 (1994) on the surface with protrusions and recesses satisfying a formula (1):

(RySm)/23,500(1).

An interlayer comprised of a high flow, low molecular weight thermoplastic resin, and at least one plasticizer is disclosed. The use of a high flow, low molecular weight thermoplastic resin, and a plasticizer creates synergy allowing the flow of the interlayer to be increased without sacrificing other characteristics typically associated with an increased flow (e.g., increased blocking, decreased mechanical strength, and decreased manufacturing capability). In this regard, the high flow, low molecular weight thermoplastic resin provides a flow improvement, resulting in a high flow interlayer. As a result, a thinner interlayer can be utilized in forming multiple layer panels because the resulting thinner interlayer has improved flow properties.

The present invention aims to provide an interlayer film for a laminated glass, which includes two or more stacked resin layers including a colored layer, exhibits excellent deaeration properties in a production process of a laminated glass, and is capable of preventing poor appearance of a colored portion, and a laminated glass including the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a laminated structure including two or more layers, at least including: an outer layer disposed on the outermost surface of the interlayer film for a laminated glass and having a large number of recesses on one surface; and a colored layer containing a colorant, a minimum distance between an outer layer side surface of the colored layer and the surface having a large number of recesses of the outer layer being 150 m or longer.

A polymer interlayer that resists optical defects. The polymer interlayer comprises a first polymer layer and a second polymer layer. The first polymer layer is disposed on a first side of the second polymer layer. A non-embossed surface of the first side of the second polymer layer includes a surface roughness. defined by an Rz value, of greater than 40 microns. The polymer interlayer has a mottle value of less than 1.0.

This disclosure is related to the field of polymer interlayers for multiple layer glass panels and multiple layer glass panels having at least one polymer interlayer sheet. Specifically, this disclosure is related to the field of polymer interlayers comprising multiple thermoplastic layers which resist the formation of optical defects.