Abstract: An optical system includes a partial reflector having an average optical reflectance of at least 30% in a plurality of wavelengths, an image source disposed to emit image light toward the partial reflector, and a reflective polarizer disposed proximate the partial reflector. The reflective polarizer is curved about two orthogonal axes and can include at least one layer substantially optically uniaxial at at least one location. The image light may be transmitted by the reflective polarizer after it is first reflected by the reflective polarizer. Substantially any chief light ray having at least first and second wavelengths at least 150 nm apart in the plurality of wavelengths and emitted by the image source and transmitted by a stop surface or exit pupil of the optical system has a color separation distance of less than 1.5 percent of a field of view.

Abstract: A method comprises: providing a layer of curable adhesive material (4) on a substrate (2); forming a pattern of microstructures (321) on the layer of curable adhesive material (4); curing a first region (42) of the layer of curable adhesive material (4) at a first level and a second region (44) of the layer of curable adhesive material (4) at a second level greater than the first level; providing a solid circuit die (6) to directly attach to a major surface of the first region (42) of the layer of curable adhesive material (4); and further curing the first region (42) of the layer of curable adhesive material (4) to anchor the solid circuit die (6) on the first region (42) by forming an adhesive bond therebetween.

Abstract: Methods of forming an array of patterns on a substrate are provided. An array of protective tiles formed from a protectant resin is provided to cover an array of sub-regions on the substrate. An array of patterns is formed on the substrate by sequentially repeating steps (i) and (ii) for each sub-region: (i) removing the protective tile from one of the sub-regions to expose the first major surface underneath; and (ii) forming a pattern on the exposed first major surface within the one of the sub-regions.

Abstract: The present invention provides a pressure-sensitive adhesive composition, including: an acrylic copolymer and a crosslinking agent. The acrylic copolymer is a reaction product of a mixture of the following monomers: a first alkyl (meth)acrylate, an alkyl group in the first alkyl (meth)acrylate having at least 6 carbon atoms; a second alkyl (meth)acrylate, an alkyl group in the second alkyl (meth)acrylate having 1 to 5 carbon atoms; and a vinyl carboxylic acid, the weight ratio of the vinyl carboxylic acid to the mixture being 4% to 5%. The crosslinking agent is an organometallic chelating agent. The weight ratio of the organometallic chelating agent to the mixture is 0.05% to 0.25%. The pressure-sensitive adhesive composition does not contain an effective amount of a tackifier. The present invention further provides a pressure-sensitive adhesive solution, a pressure-sensitive adhesive tape, and a method for preparing the same.

Abstract: The invention seeks to provide a communication system, a data transmitting device, a communication device, and a communication method capable of exchanging a sufficient capacity of data in a simple configuration without reducing the speed of a vehicle. The invention provides a communication system for transmitting data by a data transmitting device provided on a route of a moving body to the moving body having a plurality of vehicles in one formation; each of the plurality of vehicles being provided with a receiving unit that receives data transmitted from the data transmitting device; and the data transmitting device being configured to transmit mutually different data to the receiving units of the plurality of vehicles. The moving body may be a train such as the Shinkansen, or a transport vehicle such as a truck to which a plurality of cargo vehicles are connected.

Abstract: Described herein is fluorinated dye comprising: a fluorescing coumarin-derived moiety connected to an oligomer of hexafluoropropylene oxide via a non-fluorinated divalent linking group. Such fluorinated dyes are soluble in fluorinated fluids and may be used to detect leaks in various systems such as refrigerant, air conditioning and/or heat transfer systems.

Abstract: The tape incudes a water vapor-permeable air and water barrier article and a pressure sensitive adhesive layer. The air and water barrier article includes a fibrous layer having first and second major surfaces and a polymeric layer on a first major surface of the fibrous layer that penetrates into the fibrous layer but leaves at least some fibers exposed on the second major surface. The pressure sensitive adhesive layer is on the polymeric layer of the air and water barrier article. The tape can retain greater than 50 percent by weight of mortar applied according to the Vertical Mortar Receptivity Evaluation. The article includes a substrate, the tape, and a composite layer comprising at least one of gypsum, lime, or cement. The composite layer is at least one of dried or cured on the second major surface of the fibrous layer. Methods of making the article are also described.

Abstract: A wireless communication system includes a transmitter configured to transmit at least first and second radio waves having respective different frequencies F1 and F2, an electrically conductive first passive substantially linear medium, an electrically conductive first passive substantially nonlinear medium disposed proximate the first passive substantially linear medium, and a first magnetic film covering at least a portion of the first passive substantially linear medium. When the transmitter transmits the first and second radio waves, the first passive substantially linear and nonlinear media receive the first and second radio waves and generate first and second signals propagating therein at the respective frequencies F1 and F2. At least one intermodulation signal having a frequency F3 equal to nF1+mF2, where m and n positive or negative integers, is generated in the first passive substantially nonlinear medium. The first magnetic film reduces the at least one intermodulation signal by at least 2 dB.

Abstract: A retroreflective article comprises a binder layer and a plurality of retroreflective elements, each retroreflective element comprising a transparent microsphere partially embedded in the binder layer. At least some of the retroreflective elements comprise a first locally laminated layer and a second locally laminated layer that may be reflective layers. A transfer article comprises a disposable carrier layer in which the retroreflective article is detachably disposed with at least some of the transparent microspheres in contact with the disposable carrier layer.

Abstract: The disclosure relates to an abrasive article comprising: a fabric substrate comprising strands forming first void spaces between the strands; a laminate joined to the fabric substrate; a cured resin composition joined to the laminate opposite the fabric substrate; abrasive particles joined to the cured resin composition; and a plurality of second void spaces extending through the laminate coinciding with first void spaces in the fabric substrate. The disclosure also relates to methods of making such abrasive articles.

Abstract: A conformable, unframed pleated air filter, comprising a plurality of bridging filaments on at least one face of the pleated air filter.

Abstract: A composition includes a compound having structural formula (I): Rf—S—Rh (I) wherein (i) Rf is a partially fluorinated or perfluorinated group having 2 to 6 carbon atoms and optionally comprises one or more catenated heteroatoms, and (ii) Rh is a non-fluorinated hydrocarbon group having 1-3 carbon atoms and optionally comprises one or more catenated heteroatoms. The composition further includes an organic lubricant contaminant.

Abstract: An expandable structural adhesive film for bonding metal parts. The adhesive film comprises at least one first epoxy compound; at least one epoxy curing agent; at least one blowing agent; at least one film-forming agent; and at least one impact modifier. The structural adhesive film exhibits an elongation at break of at least 300% according to tensile test DIN EN ISO 527 and a free expansion rate according to EN 2667-3 of at least 45%.

Abstract: Methods and systems of using pocket roller (110, 130) to place objects on a continuously moving web (2) are provided. The objects are received in an array of pockets (124) on a major surface of a roller sleeve (120). The roller sleeve (120) engages with an adhesive surface (22) of the continuously moving web (2) to place the objects on the web (2).

Abstract: A structured optical surface and an optical imaging system including the structured optical surface is described. The structured optical surface includes a plurality of structures formed by an intersection of at least first and second Fresnel patterns, such that when the structured optical surface is incorporated in an optical imaging system comprising a pixelated display surface with at least one pixel comprising at least two sub-pixels spaced apart by a gap, the structured optical surface images the at least two sub-pixels onto an image surface as at least two corresponding imaged sub-pixels spaced apart by a corresponding imaged gap, and the structured optical surface diffracts light so that the diffracted light at least partially fills the imaged gap without substantially overlapping any of the at least two imaged sub-pixels.

Abstract: [Problem] To provide a thermally expandable adhesive sheet which is tack-free in the state prior to use and exhibits high workability using a different means than that of related art. [Solution] The present invention provides a thermally expandable adhesive sheet (1) including: a substrate (3); two thermally expandable adhesive layers (5) each provided on either side of the substrate; and two adhesive permeable layers (7) each provided on a surface of the two adhesive layers, the adhesive permeable layers being permeable to the adhesive at the time of the thermal expansion of the adhesive. By heating the adhesive sheet, it is possible to expand the adhesive sheet while simultaneously allowing the adhesive to emerge on the outermost surface of the adhesive sheet.