An object of the present invention is to provide a coloring technique for fiber substrates, the technique being capable of imparting metallic luster and further reducing discoloration. The object can be achieved by a laminated sheet comprising a fiber substrate and a metal element- or metalloid element-containing layer, the fiber substrate holding a sealing material.

A polymer film having a laminated structure is provided. The polymer film includes a plurality of first overlapping film units and a plurality of second overlapping film units disposed in an alternately-laminated manner with the first overlapping film units. Each of the first overlapping film units includes a first lower film and a first upper film, and each of the first overlapping film units is configured to reflect visible light in a first visible light wavelength range. Each of the second overlapping film units includes a second lower film and a second upper film, and each of the second overlapping film units is configured to reflect visible light in a second visible light wavelength range. The first visible light wavelength range is different from the second visible light wavelength range.

The present disclosure provides a process. The process includes (A) providing at least 6 film layers, each film layer being a pearlized biaxially oriented polypropylene; (B) applying a solvent-less adhesive at a coat weight of 2.0 g/m.sup.2 to 3.5 g/m.sup.2 between each film layer; and (C) forming a laminate, the laminate having a thickness of at least 300 μm. The solvent-less adhesive contains (i) a polyol component including at least one polyol selected from a polyester polyol, a polyether polyol, and combinations thereof; and (ii) an isocyanate component including an isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from a polyester polyol, a polyether polyol, and combinations thereof. The present disclosure also provides a laminate formed by said process.

The present disclosure describes covers for electronic devices, electronic devices, and methods of making covers for the electronic devices. In an example, a cover for an electronic device can comprise: a rigid substrate; a high refraction polymeric film adherable on the rigid substrate; a semitransparent polymeric film adherable on the high refraction polymeric film, wherein the high refraction polymeric film comprises: polyacrylic, polycarbonate, cyclic olefin copolymer, or combinations thereof, and high refractive nanoparticles, and wherein the semi-transparent polymeric film comprises: polyester, polyacrylic, polycarbonate, polyvinyl chloride, silicone rubber, or combinations thereof, and at least one colorant.

An ink contains a water-soluble organic solvent, a glittery pigment having a median size less than 300 nm, and a polycarbonate-based urethane resin.

An optical security feature comprising a visually deformable layer disposed between two polymer layers, which are fused together by heating, thereby yielding an embossed appearance to the visually deformable layer.

One or more aspects of the present disclosure are directed to components having an optical element that imparts structural color to the component or article. The present disclosure is also directed to articles of manufacture including the component having an optical element, and methods for making components and articles having an optical element that imparts structural color.

One or more aspects of the present disclosure are directed to bladders that incorporate a multi-layer optical film that impart a structural color to the bladder. The present disclosure is also directed to articles including the bladders having a multi-layer optical film, and methods for making articles and bladders having a multi-layer optical film.

Components of articles that include an optical element that imparts structural color to the component are provided. Methods of making the components including the optical element, and methods of using the components such as to make an article of manufacture are provided.

As described above, one or more aspects of the present disclosure provide articles having structural color, and methods of making articles having structural color. The article can include the optical element (e.g., a single layer reflector, a single layer filter, a multilayer reflector or a multilayer filter) including one or more layers (e.g., a reflective layer(s), a constituent layer(s), and the like). The surface of the article can include areas of the surface that are at different relative heights from one another and can impart different structural colors.