Membrane elements that use multiple membrane leaves may have a limited total active membrane area due to an increased diameter at the ends of the element. Membrane leaves may comprise a permeate carrier positioned between one or more membrane sheets. Adhesive may be used to seal one or more edges of the membrane leaf. The membrane sheets, permeate carrier and the adhesive contribute to the thickness of the edges of the membrane leaf and the diameter at the ends of the element. A reduced thickness of the edges of the permeate carrier may reduce the diameter at the ends of an element. Another permeate carrier sheet may also be used that is distanced from at least one edge of the membrane sheet so the permeate carrier sheet does not contribute towards the increased diameter at the ends of the element.

The present invention relates to a formaldehyde-free binder composition for mineral fibres comprising: at least one phenol and/or quinone containing compound, at least one protein, at least one fatty acid ester of glycerol.

The present invention concerns a method of producing a moulded mineral wool insulation product, said method comprising the steps of providing a mixture by mixing mineral fibres with a binder composition, and providing said mixture in a mould form, and then curing the binder, wherein the binder composition comprises at least one hydrocolloid, and then removing the moulded product from the mould form.

Embodiments are directed to systems and methods for creating a tubular composite structure. In one embodiment, a device comprises multiple layers of cured composite fabric bonded together to form a tubular composite structure, wherein alternating groups of the multiple layers comprise on-axis fabric and off-axis fabric. The tubular composite structure may form a spar for an aerodynamic component. The composite fabric may comprise one or more of carbon, fiberglass, or other composite materials, or a combination of materials. One or more stacks of the fabric wrap completely around the tubular composite structure, and other stacks of fabric may not wrap completely around the tubular composite structure.

A preform element has a tucked portion in at least a portion of a prepreg composed of a reinforced fiber and a thermosetting resin. The preform element, a preform using the same, and a method of producing the same, provide for the preform element to have excellent mechanical properties or filling characteristics with respect to a cavity and is effective in avoiding problems such as fiber bridging or resin richness or warping, even when a three-dimensional form having thickness variations such as thick parts or projections is obtained through a press molding.

The present invention relates to a laminated film roll body, around which a laminated film is wound, the laminated film including: a first polyimide film; and a second polyimide film laminated on the first polyimide film and made of a fluorine-based, siloxane-based, or amine-based polyamic acid, wherein the second polyimide film has a glass transition temperature of 350 C. or higher when measured by a temperature elevation rate of 20 C./min. The laminated film roll body can be used in a continuous manufacturing process of a flexible device to improve process yield and efficiency.

A method for fabricating emulated wood with pores and fibers, comprising: immersing a plurality of synthetic fibers configured parallel in a plane into a resin so that the resin is coated on the surfaces of the plurality of synthetic fibers and in the gaps between the plurality of synthetic fibers; placing the plurality of synthetic fibers between two sheets, wherein the two sheets are planar sheets made from a uniform composition comprising a thermoplastic elastomer, a foaming agent, and a crosslinking agent; carrying out a heat-press process on the two sheets so that the foaming agent undergoes microcellular foaming and forms dense closed pores in the two sheets, and so that the composition on inner surfaces of the two sheets expands towards the plurality of synthetic fibers and penetrates through the gaps between the plurality of synthetic fibers; and cooling the two sheets to yield an emulated wood board.

An installation for shaping a fiber preform as a body of revolution presenting a profile that varies in radial section, the installation including a storage mandrel for storing a fiber texture, follower rollers, and a mold in the form of a body of revolution on which the fiber texture is to be shaped by winding, the follower roller(s) being placed between the storage mandrel and the mold in the form of a body of revolution. The storage mandrel, each follower roller, and the mold present radii across their axial widths that vary to define outer surfaces having profiles in relief. A follower roller has sectors releasably fastened on the outer surface of the roller, each sector extending over a fraction of the circumference of the roller and over all or part of the axial width of the roller.

A gas turbine engine is provided. The gas turbine engine comprising: a fan section having a fan; and a containment zone encircling the fan, the containment zone comprising: a ballistic liner composed of a plurality of ring segments located radially outward of the fan; wherein each of the plurality of ring segments include two opposing circumferential ends, and wherein the plurality of ring segments are arranged circumferentially around the fan section and the circumferential ends of each of the plurality of ring segments meet at joints to form the ballistic liner.

There is provided a manufacturing method of a tank. The manufacturing method comprises a cooling process of cooling down a resin-adhering fiber bundle that has a resin adhering to a fiber bundle; and a winding process of winding the resin-adhering fiber bundle that is cooled down by the cooling process, on a rotating liner. The cooling process cools down the resin-adhering fiber bundle to make a temperature of the resin-adhering fiber bundle that is being wound on the liner in the winding process, equal to or lower than a set temperature which is set in advance as a temperature to provide a viscosity of the resin that prevents the resin from being splashed from the resin-adhering fiber bundle by rotation of the liner in a course of winding the resin-adhering fiber bundle on the liner.