A method of forming an antireflection optical body (16a) includes: an application step of applying an adhesive (12) other than an epoxy adhesive onto an adherend (11); a fixing step of pressing a substrate film (15) having a fine structure body (16) at one surface side thereof against the adherend (11) from an opposite surface side to the one surface side to fix the adherend (11) and the fine structure body (16) through the adhesive (12); and a peeling separation step of releasing the pressing of the substrate film (15) and peeling fixed fine structure body (16) that is fixed to the adherend (11) through the adhesive (12) from the substrate film (15) while separating the fixed fine structure body (16) from fine structure body (16) on the substrate film (15) at a location where the fine structure body (16) is fixed to the adherend (11) such that the fixed fine structure body (16) is formed on the adherend (11) as an antireflection optical body (16a).

The present invention aims to provide an interlayer film for a laminated glass that can, even when having a thickness at the thickest portion of 850 μm or more, exhibit sufficient deaeration properties in production of a laminated glass to provide a laminated glass with high transparency, 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 (μm) measured in conformity with JIS K-6732 (1996) and a maximum height roughness Ry (μm) 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′):

Ry≥0.020×T+16.6   (1),

T≥850   (1′).

A polymer film comprising polyvinyl acetal and a laminated glass manufactured using the same are provided. The polymer film has a 45-100° C. dimensional variability ranging from 20 μm to 50 μm, and at least one surface of the polymer film has a surface roughness Rz ranging from 30 μm to 55 μm.

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 2 μm.sup.3/μm.sup.2 to 18 μm.sup.3/μm.sup.2, wherein the void volume (Vv) and material ratio are defined in accordance with ISO 25178-2:2012.

The present invention aims to provide an interlayer film for a laminated glass having recesses in the shape of engraved lines on both surfaces to exhibit excellent deaeration properties in production of a laminated glass and suppressing formation of a moire pattern when unwound from a rolled body thereof. The present invention also aims to provide a laminated glass including the interlayer film for a laminated glass, a method for producing an embossing roll suitably used for production of the interlayer film for a laminated glass, and a method for producing the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses on both surfaces, the recesses each having a groove shape with a continuous bottom and being regularly adjacent and parallel to each other, the interlayer film having a glossiness on a surface with the large number of recesses measured in conformity with JIS Z 8741-1997 of higher than 3% or a haze value measured in conformity with JIS K 7105-1981 of 87% or lower.

An antireflection optical body formed on an adherend includes an adhesive other than an epoxy adhesive applied on the adherend, and a fine structure body fixed to the adherend by the adhesive. A thickness of the adhesive and the fine structure body is 5.5 μm or more and 8.6 μm or less.

A method of forming an antireflection optical body includes: an application step of applying a photocurable resin onto one surface side of an adherend; a pressing step of pressing a substrate film having a fine structure body at one surface side against the photocurable resin from an opposite surface side by a light guide; a curing step of curing the photocurable resin by transmitting light through the light guide; and a peeling separation step of releasing the pressing of the substrate film and peeling fixed fine structure body that is fixed to the adherend through the cured photocurable resin substrate film while separating the fixed fine structure body from fine structure body on the substrate film other than at a location fixed through the photocurable resin such that the fixed fine structure body is formed on the adherend as an antireflection optical body.

A film for laminated glass, the film including a surface embossing pattern formed on at least a portion of one side of the film, wherein the surface embossing pattern comprises convexities, and concavities separating the convexities from one another, each of the convexities is surrounded by some of the concavities, and an average area of the convexities is 0.01 mm.sup.2 to 4.00 mm.sup.2.

A polymer film comprising polyvinylacetal 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 m.sup.3/m.sup.2 to 34.3 m.sup.3/m.sup.2, wherein the void volume (Vv) and material ratio are defined in accordance with ISO 25178-2:2012.

The present invention aims to provide an interlayer film for a laminated glass having recesses in the shape of engraved lines on both surfaces to exhibit excellent deaeration properties in production of a laminated glass and suppressing formation of a moire pattern when unwound from a rolled body thereof. The present invention also aims to provide a laminated glass including the interlayer film for a laminated glass, a method for producing an embossing roll suitably used for production of the interlayer film for a laminated glass, and a method for producing the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses on both surfaces, the recesses each having a groove shape with a continuous bottom and being regularly adjacent and parallel to each other, the interlayer film having a glossiness on a surface with the large number of recesses measured in conformity with JIS Z 8741-1997 of higher than 3% or a haze value measured in conformity with JIS K 7105-1981 of 87% or lower.