Abstract: Films and articles are described comprising a microstructured surface having an array of peak structures and adjacent valleys. For improved cleanability, the valleys preferably have a maximum width ranging from 10 microns to 250 microns and the peak structures have a side wall angle greater than 10 degrees. The peak structures may comprise two or more facets such as in the case of a linear array of prisms or an array of cube-corners elements. The facets form continuous or semi-continuous surfaces in the same direction. The valleys typically lack intersecting walls. Also described are methods of making and methods of use. The microstructured surface of the article can be prepared by various microreplication techniques such as coating, injection molding, embossing, laser etching, extrusion, casting and curing a polymerizable resin; and bonding microstructured film to a surface or article with an adhesive.

Abstract: The present disclosure provides a radiative cooling article including a white diffusely reflective microporous layer and a non-white color reflective mirror film having first and second optical layers. The white diffusely reflective microporous layer has a solar weighted reflectivity at normal incidence of electromagnetic radiation over a majority of wavelengths in a range of 350 nanometers (nm) to 2500 nm of 0.8 or greater, 0.85, 0.9, or 0.95 or greater. The non-white color reflective film is disposed adjacent to a major surface of the white diffusely reflective microporous layer and the non-white color reflective film reflects a wavelength bandwidth of at least 30 nm within a wavelength range of 350 nm to 700 nm. The non-white color reflective film can be tuned to reflect light of a specific color (e.g., blue light, green light, or red light). The radiative cooling article may be useful for applications including commercial graphics located outdoors (e.g., on vehicles or buildings).

Abstract: Pressure sensitive adhesives and tapes having flame-retardant properties include a substrate layer and a layer of pressure sensitive adhesive disposed on the substrate layer. The pressure sensitive adhesive is a UV-cured composition of a curable composition. The curable composition includes a polymerizable (meth)acrylate-based mixture, a polymerizable aromatic (meth)acrylate oligomer, a liquid flame retarding agent, and at least one UV initiator. The UV-cured composition is an optically clear pressure sensitive adhesive with flame retarding properties.

Abstract: An adherable film includes a substrate that is substantially free of a flame retardant material and has a top major surface and a bottom major surface. An adhesive layer disposed on the bottom major surface of the substrate has a continuous pattern. The adhesive layer is made of an adhesive that is substantially free of a flame retardant material. In a plan view, the continuous pattern defines a plurality of discontinuous non-adhesive portions of the substrate without the adhesive. Each discontinuous non-adhesive portion is completely surrounded by the continuous pattern. The adherable film including the adhesive layer having the continuous pattern exhibits an improved flame retarding characteristic relative to a discontinuous adherable film having a substrate with a same material composition as that of the substrate of the adherable film and a discontinuous adhesive layer with a same material composition as that of the adhesive layer of the adherable film.

Abstract: Methods and kits including writable and cleanable articles, wherein in one embodiment, a method of replenishing a hydrophilic surface on a writable and cleanable article is provided. The method comprising: providing a writable and cleanable article that includes a hydrophilic overcoat that has an at least partially depleted (i.e., at least partially exhausted) hydrophilic surface; and applying a cleaning and protecting composition to at least a portion of the hydrophilic overcoat; and drying the cleaning and protecting composition to provide a dried surface having a replenished hydrophilic surface.

Abstract: The present disclosure relates to a low-combustibility film construction. The film construction includes a film layer, a first adhesive layer with a fire-retardant additive of at least 41% by weight and a second adhesive layer. The total thickness of the adhesive layers is in the range of 18.5 to 44.5 microns. The total thickness of the fire retardant adhesive layer is 32% to 85% of the total adhesive thickness.

Abstract: A decorative sheet includes a decorative base layer; an adhesive layer disposed on a surface of the decorative base layer; and transparent layer disposed on an opposing surface of the base layer from the adhesive layer. The base layer may include up to 50 weight percent inorganic non-combustible filler. The sheet has a reduced heat of combustion or reduced flammability relative to currently available decorative sheets.

Abstract: Polymer fibers are formed with concentric alternating layers of different polymer materials. The layers pairs have cross-sectional thicknesses selected for reflecting light at a selected visible wavelength. A cross-sectional dimension of the core is at least ten times an average of the selected thicknesses of the alternating layers. Some articles formed by the fibers are formed by attaching one fiber to another: the color of the fibers at the point of attachment is different from the colors of the fibers elsewhere. The fibers may be deformed to change its color properties by elongating the cross-section of the polymer fiber along a first cross-sectional axis. In some embodiments, the fibers are polarization sensitive.

Abstract: First and second optical films in a stack each have a structured surface defining extended Fresnel lenses. First and second Fresnel lenses of the respective first and second films extend generally parallel to different first and second in-plane axes respectively. The films may be attached together such that light transmitted by one film is intercepted by the other. The film stack may also include a diffuser disposed to scatter light transmitted by the optical film(s). Other disclosed decorative articles include an individual optical film having a structured surface with transmissive facets arranged in a cyclic slope sequence from substantially zero to a maximum positive slope to substantially zero to a maximum negative slope and back to substantially zero, the sequence repeating over some or all of the structured surface. The slope sequence may define alternating focusing and defocusing Fresnel lenses, and the Fresnel lenses may be extended and linear.

Abstract: A decorative film having a wood-like 3-dimensional appearance includes a plurality of Fresnel mirrors extending generally parallel to an in-plane axis, a diffuser disposed to scatter light reflected by the Fresnel mirrors, and wood-grain indicia disposed to cover the Fresnel mirrors. Embodiments of the film can be made to simulate highly figured wood such as flame maple, also called fiddleback maple. Other decorative articles that utilize Fresnel mirrors are also disclosed. At least some of these other articles do not have a wood-like appearance, and they may include a Fresnel mirror film in combination with other components such as a Fresnel lens film or other light-transmissive film(s).

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.

Abstract: Security laminates and articles wherein the security laminate includes a first substrate having a first major surface and a second major surface; a plurality of retroreflective elements affixed along the first major surface of the substrate, the retroreflective elements including a solid spherical core comprising an outer core surface, the outer core surface providing a first interface; a first complete concentric optical interference layer having an inner surface overlying core surface and an outer surface, the outer surface of the first complete concentric optical interference layer providing a second interface; a second complete concentric optical interference having an inner surface overlying the outer surface of the first complete concentric optical interference layer and an outer surface, the outer surface of the second complete concentric optical interference layer providing a third interface; the security laminate is retroreflective.

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.

Abstract: Polymer fibers are formed with concentric alternating layers of different polymer materials. The layers pairs have cross-sectional thicknesses selected for reflecting light at a selected visible wavelength. A cross-sectional dimension of the core is at least ten times an average of the selected thicknesses of the alternating layers. Some articles formed by the fibers are formed by attaching one fiber to another: the color of the fibers at the point of attachment is different from the colors of the fibers elsewhere. The fibers may be deformed to change its color properties by elongating the cross-section of the polymer fiber along a first cross-sectional axis. In some embodiments, the fibers are polarization sensitive.

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.

Abstract: Microlens sheetings with different types of composite images are disclosed, in which the composite image floats above, in, or below the sheeting, or some combination. One type of composite image may be viewable to the unaided eye or an observer and another type of composite image is viewable only to the aided eye of an observer. Methods for providing such an imaged sheeting are also disclosed.