Provided is a rotor blade that may include a first layer having first plurality of fibers oriented at first angle of about 20 to 30 degrees relative to a long axis of the rotor blade, a second plurality of fibers oriented at a second angle of about 60 to 75 degrees relative to the first plurality of fibers, and a third plurality of fibers oriented at a third angle of about 60 to about 75 degrees relative to the second plurality of fibers.

An anisotropic conductive film 1A includes a conductive particle array layer 4 in which a plurality of conductive particles 2 are arrayed in a prescribed manner and held in an insulating resin layer 3. The anisotropic conductive film 1A has a direction in which a thickness distribution, around the individual conductive particle, of the insulating resin layer 3 holding the array of the conductive particles 2 is asymmetric with respect to the conductive particle 2. The direction in which the thickness distribution is asymmetric is aligned in the same direction in the plurality of conductive particles. When an electronic component is mounted using this anisotropic conductive film 1A, short circuits and conductive failure can be reduced.

A floor panel may include a substrate and a top layer located above the substrate. The substrate may include a closed cell foamed synthetic material layer with fillers, and have an average density of more than 300 kilograms per cubic meter. The top layer may include a back layer, a printed synthetic material film above the back layer, and a transparent or translucent synthetic material wear layer above the printed synthetic material film. The back layer may include a vinyl compound with fillers, and have a thickness of at least 45 percent of the thickness of the top layer. The floor panel may include first mechanical coupling parts at the pair of long edges and second mechanical coupling parts at the pair of short edges. The first mechanical coupling parts may allow horizontal and vertical locking of two of such floor panels using a turning movement along the respective long edges.

A floor panel may include a substrate and a top layer. The top layer may include a printed thermoplastic film and a thermoplastic transparent or translucent layer provided on the printed thermoplastic film. The substrate may be a synthetic material board including a filler. The substrate may include coupling means provided at edges of the synthetic material board. The coupling means may enable locking with a similar floor panel and prevent separation in a horizontal direction using locking parts with horizontally active locking surfaces. The horizontally active locking surfaces may be oriented at an angle A of more than 90 degrees with the horizontal direction. A first one of the locking parts may be an upstanding part at a bottom lip of a first one of the edges. The angle A may be between (a) a tangent of the horizontally active locking surfaces, and (b) a direction in a horizontal plane that points away from an open curved surface of the upstanding part.

Composite structures and methods of their manufacture are provided. In one embodiment, the composite structure includes a substrate which includes a relatively soft material, and nanoparticles which include a relatively hard material and which are embedded (i) within at least a surface region of the substrate, or (ii) uniformly within and throughout the substrate, in an amount effective to improve the wear resistance of the substrate. Methods for forming these composite structures include a hot-rolling process, a roll-bonding process, or a combination thereof.

A stretchable film includes a first region including a plurality of first patterns having a concave polygonal shape. The stretchable film also includes a second region including a plurality of second patterns having a concave polygonal shape. The stretchable film further includes a buffer region between the first region and the second region.

A graphene sheet and a method of manufacturing the graphene sheet are provided. The method includes: growing a graphene sheet on a graphene growth support by applying carbon sources and heat to the graphene growth support, the graphene growth support including a carbonization catalyst; and forming at least one ripple on the graphene sheet by cooling at least one of the graphene growth support and the graphene sheet, wherein the graphene growth support and the graphene sheet have different thermal expansion coefficients.

A method for producing a fiber composite laminate, including the steps of applying pressure and/or heat to a first preform, which has one or more dry fiber layers and a thermoplastic elastomer, such that the thermoplastic portion of the thermoplastic elastomer completely impregnates the dry fiber layers of the first preform in at least one first region and only partially impregnates the dry fiber layers in at least one second region and, in a thermosetting polymer matrix, impregnating and curing the fiber layers of the second region of the first preform that are still dry and have not been impregnated with the thermoplastic portion of the thermoplastic elastomer.

Disclosed are compositions and methods for creating a textured or patterned surface on elastomeric extruded film.

The present invention relates to a honeycomb-structured sitting cushion comprising: a lower seat in which first through holes, which are vertical holes having a regular hexagonal cross-section, are formed and the first through holes, spaced at predetermined intervals from each other by first partitions, are consecutively formed in x-axial and y-axial directions; and an upper seat which is formed on the lower seat, and in which second through holes, which are vertical holes having a regular hexagonal cross-section larger than that of the first through holes, are formed, and the second through holes, spaced at predetermined intervals from each other by second partitions having a thickness (T2) smaller than the thickness (T1) of the first partitions, are consecutively formed in x-axial and y-axial directions, wherein the centers of the first through holes and the first partitions are aligned with the centers of the second through holes and the second partitions.