The present disclosure relates to an optical film includes (A) an optical functional layer and (B) a block layer, and (B) the block layer has a cured product of a resin composition containing (B-1) a thermoplastic resin and (B-2) an ultraviolet curable resin.

Provided is an interlayer film for laminated glass capable of enhancing the interlayer adhesive force, and enhancing the sound insulating property after a lapse of a certain period of time from production of the interlayer film. An interlayer film for laminated glass according to the present invention is an interlayer film for laminated glass having a one-layer or a two or more-layer structure, a compound obtained by trimethylsilylating the polyvinyl acetate in the presence of N,O-bis(trimethylsilyl)trifluoroacetamide shows a hydrogen peak of trimethylsilyl group existing at 0.06 ppm or more and 0.3 ppm or less in .sup.1H-NMR measurement in chloroform-d, and a ratio of peak intensity of all peaks existing at 0.06 ppm or more and 0.3 ppm or less, to intensity of all peaks existing at 4.5 ppm or more and 5.3 ppm or less satisfies 0.02 or more and 3 or less.

Provided is an interlayer film for laminated glass with which the penetration resistance of laminated glass can be heightened. An interlayer film for laminated glass according to the present invention includes one end and the other end on an opposite side of the one end, the other end has a thickness larger than a thickness of the one end, the interlayer film does not contain or contains alkali metal, the interlayer film does not contain or contains alkali earth metal, and the interlayer film contains magnesium. Further in the interlayer film for laminated glass, a content of magnesium in a surface portion of a first region on the one end side of the interlayer film after heated at 150 C. for 30 minutes, a total content of alkali metal, alkali earth metal and magnesium in the surface portion of the first region on the one end side of the heated interlayer film, a content of magnesium in a surface portion of a second region on the other end side of the heated interlayer film, and a total content of alkali metal, alkali earth metal and magnesium in the first or second region of the interlayer film after heat satisfy specific relationships.

Plasiticized polyvinylacetal films with greater film-to-film uniformity are produced by a process of extruding a melt stream containing a polyvinyl acetal and a plasticizer at 150-250 C., the film having a predefined melt viscosity at 60-170 C., by providing a first melt stream of at least a first plasticizer and a first polyvinyl acetal resin and measuring its melt viscosity at 60-170 C. online; and adjusting the 60-170 C. melt viscosity by adding a second plasticizer and/or a second polyvinyl acetal resin to the first melt stream in an amount to provide a second melt stream with a melt viscosity at 60-170 C. having a difference of at most 20% to the predefined melt viscosity at 60-170 C.

Provided is an interlayer film for a laminated glass capable of obtaining laminated glass having excellent unity of appearance. An interlayer film for a laminated glass according to the present invention has one end, and the other end, and when the interlayer film is arranged between two sheets of clear glass conforming to JIS R3202:1996 to obtain a laminated glass X, the interlayer film has a colored region where visible light transmittance of the laminated glass X is 1% to 50%, the colored region has a plane area of 95% or more in 100% of a total plane area of the interlayer film, the laminated glass X has a first visible light transmittance at a position of 5 cm from the one end toward the other end of the interlayer film, and a second visible light transmittance at a position of 5 cm from the other end toward the one end of the interlayer film, the first visible light transmittance being smaller than the second visible light transmittance, the first visible light transmittance is 1% to 20%, the second visible light transmittance is 5% to 50%, and an absolute value of difference between the first visible light transmittance and the second visible light transmittance is 2% to 45%.

Provided is a laminated glass having an achromatic color or a color close to achromatic color despite the use of colored glass. A laminated glass according to the present invention includes: a first lamination glass member which is colored glass; a second lamination glass member; and a colored interlayer film, the colored interlayer film is arranged between the first lamination glass member and the second lamination glass member, and the laminated glass has a color coordinate a* in L*a*b* color system of 5 or more and 5 or less, and a color coordinate b* in L*a*b* color system of 5 or more and 5 or less.

Provided is an interlayer film for laminated glass capable of enhancing the heat shielding property, suppressing multiple images, and satisfactorily displaying an image. An interlayer film for laminated glass according to the present invention includes: an infrared reflective layer, a first resin layer containing a thermoplastic resin, and a second resin layer containing a thermoplastic resin, the first resin layer is arranged on a first surface side of the infrared reflective layer, the second resin layer is arranged on a second surface side opposite to the first surface of the infrared reflective layer, the first resin layer has a wedge angle of 0.1 mrad or more, and a light reflectance at a wavelength of 480 nm to 680 nm at an incident angle of 60 degrees is 15% or less when a clear glass is arranged outside the first resin layer of the interlayer film, and a green glass is arranged outside the second resin layer of the interlayer film to obtain a laminated glass, and light is applied from outside the green glass of the laminated glass.

Provided is a laminated glass having excellent heat shielding property, capable of suppressing multiple images in a head-up display, and providing better image display. The laminated glass according to the present invention includes a first lamination glass member, a first resin layer, an infrared reflective layer, and a second lamination glass member, and a laminate of the infrared reflective layer and the second lamination glass member has a small thickness, or a laminate of the infrared reflective layer and the second lamination glass member is wedge-like, or the laminated glass includes a first lamination glass member, a first resin layer, an infrared reflective layer, a second resin layer, and a second lamination glass member, and a laminate of the infrared reflective layer, the second resin layer and the second lamination glass member has a small thickness, or a laminate of the infrared reflective layer, the second resin layer and the second lamination glass member is wedge-like.

Provided is an interlayer film for laminated glass with which distortion in the appearance of the laminated glass can be significantly suppressed. The interlayer film for laminated glass according to the present invention has one end, and the other end being at the opposite side of the one end, the other end has a thickness that is larger than a thickness of the one end, the interlayer film as a whole has a wedge angle of 0.1 mrad or more, and the following absolute value A in all sections A located every 150 mm in the following measurement of partial wedge angles is 0.4 mrad or less.

To provide laminated glass for a vehicle, which is excellent in heat-shielding properties and which is capable of maintaining visible light transmittance to be high even when used for a long period of time. Laminated glass for a vehicle, which is laminated glass comprising a pair of glass plates and an intermediate film sandwiched between the pair of glass plates, wherein in a laminated glass specimen of 1 cm.sup.2 cut out from the laminated glass in the thickness direction, the content of CeO.sub.2 is at most 0.4 mg, and the content of total iron converted to Fe.sub.2O.sub.3 is at least 6.0 mg and at most 10.0 mg; and the intermediate film is made of a resin film containing tin-doped indium oxide fine particles having an average particle diameter of at most 0.1 m.