A composite cooling film (100) comprises an ultraviolet-reflective multilayer optical film (120) and a reflective microporous layer (110) secured thereto. The ultraviolet-reflective multilayer optical film (120) hat is at least 50 percent reflective of ultraviolet radiation over a majority of the wavelength range of at least 340 but less than 400 nanometers. The reflective microporous layer (110) has a continuous phase comprising a nonfluorinated organic polymer and is diffusely reflective of solar radiation over a majority the wavelength range of 400 to 2500 nanometers, inclusive. The composite cooling film (100) has an average absorbance over the wavelength range 8-13 microns of at least 0.85. An article (1200) comprising the composite cooling film (100) adhered to a substrate (1210) is also disclosed.

Infrared reflectors are described. In particular, infrared reflectors with reduced off-axis color are described. Such infrared reflectors may be useful in laminated glass constructions, particularly for applications where the glass may be exposed to water.

Provided are a decorative film including a reflective layer which consists of a dielectric multi-layer film and develops a color due to an optical interference or a structural color, in which the dielectric multi-layer film has a plurality of regions having different reflection performances in an in-plane direction, at least one of the plurality of regions is a region having a specular reflectivity, and at least another one of the plurality of regions is a region having a diffuse reflectivity; and a molded product and an electronic device using the decorative film.

Multilayer infrared (IR) reflecting films are provided. An optical repeating unit of the film include a plurality of optical polymeric layers arranged to reflect light by constructive and destructive interference. Optical layer A is a high refractive index polymeric layer, and optical layer B is a low refractive index isotropic polymeric layer containing fluoropolymers. The film has an average reflectance of about 50% to about 100% in a near infrared wavelength range of about 850 nm to about 1850 nm, and an average transmission of about 70% to about 90% in a visible light range.

An object of the present invention is to provide a method for producing a reflective layer having an excellent diffuse reflectivity and a wide reflection wavelength range. Another object of the present invention is to provide a reflective layer having an excellent diffuse reflectivity and a wide reflection wavelength range. The method for producing a reflective layer of the present invention includes: a step 1 of applying a composition selected from the group consisting of the following composition X and the following composition Y onto a substrate to form a composition layer; a step 2 of heating the composition layer to align a liquid crystal compound in the composition layer into a cholesteric liquid crystalline phase state; a step 3 of cooling or heating the composition layer in a cholesteric liquid crystalline phase state to reduce a helical pitch; and a step 4 of irradiating at least a partial region of the composition layer with light, between the step 1 and the step 2, between the step 2 and the step 3, or after the step 3, to photosensitize a chiral agent A or a chiral agent C in the composition layer. Composition X: a composition including a liquid crystal compound, a chiral agent A whose helical twisting power is changed upon light irradiation, and a chiral agent B whose helical twisting power is increased upon cooling or heating. Composition Y: a composition including a liquid crystal compound and a chiral agent C whose helical twisting power is changed upon light irradiation and whose helical twisting power is increased upon cooling or heating.

Provided is a method for producing a reflective layer having excellent diffuse reflectivity. The method for producing a reflective layer of the present invention includes Step 1 of applying a composition containing a liquid crystal compound and a chiral agent onto a substrate and heating the applied composition to align the liquid crystal compound into a cholesteric liquid crystalline phase state, and Step 2 of forming a reflective layer by cooling or heating the composition so that the helical twisting power of the chiral agent contained in the composition in the cholesteric liquid crystalline phase state increases by 5% or more.

Thermoplastic birefringent multilayer optical films are described. More particularly, thermoplastic multilayer films having alternating first and second layers having a linear layer profile where both outer layers are thinner than 350 nm but thicker than 150 nm are described. Thermoplastic birefringent multilayer optical films with thinner outer protective boundary layers are described.

Reflective stacks including heat spreading layers (320) are described. In particular, reflective stacks including polymeric multilayer reflectors (330). Heat spreading layers (320) may include natural or synthetic graphite or copper.

The present invention is a film having at least one reflection band in which the reflectance is 30% or greater continuously in at least a 100-nm range in a wavelength range of 1200-1800 nm when light is incident from at least one side, the mean transmittance in a wavelength range of 430-600 nm is 70% or greater, and the average value of the axial rigidity of the film in the principal orientation axis direction of the film and in the direction orthogonal thereto is 45 N/m or less.

Optical films are described. In particular, optical films including a reflective polarizer portion and an infrared portion, with no adhesive between these two portions, are described. These optical films may be particularly suitable for combiner applications, including automotive heads up display applications with demanding ambient environments.