A combustion membrane (14) for a gas burner (2) comprises a fabric or mesh (21) of interlaced metal threads (22), having two opposite interlacing surfaces (19, 20) which form a combustion surface (19) and an inner surface (20) of the fabric/mesh (21), respectively, wherein the metal threads (22) are formed by twisted metal fibers (22) to form a yarn and: the individual metal fibers (22) are shorter than the yarn (22) formed therefrom, and free ends (22″) of the metal fibers (22) protrude divergently from the yarn (22) along its longitudinal extension and make the yarn (22) hairy, and the metal thread (22) is a yarn (22) of mass per length in the range from 0.8 g/m to 1.4 g/m.

Provided is an antiviral filter medium. An antiviral filter medium according to one embodiment of the present invention includes a first member provided with an antiviral coating layer formed of fibers and including, on part or all of the outer surface of the fibers, an antiviral fusion protein in which an antiviral motif is bound to an adhesive protein. Accordingly, the antiviral filter medium exhibits antiviral properties, is excellent in filtration efficiency and ventilation amount (or flow rate), and has low pressure loss. In addition, the antiviral filter medium is characterized in that the coating layer exhibiting antiviral properties retains adhesiveness for a long period of time after being attached to the surface. Moreover, the antiviral filter medium can retain antiviral activity for a long time without loss of the antiviral activity due to external conditions during production, storage, and use.

A continuous strand includes a pencil normal (PN) section, two first pencil tapering (PT) sections, two second PT sections, and two pencil connection (PC) sections. The pencil normal (PN) section extends along a longitudinal direction thereof and having a first cross-sectional area of a constant size. The two first pencil tapering (PT) sections are tapered in such a way that cross-sectional areas decrease. Two second PT sections are tapered in such a way that the decreased cross-sectional areas increase again. The two pencil connection (PC) sections connect a first PT section and a second PT section that are adjacent to each other, and have a second cross-sectional area of a constant size. The continuous strand may implement a multi step-pencil tapering (MS-PT) effect that presents significantly improved aesthetic characteristics for a wig, without resorting to a labor-intensive manual operation.

A continuous strand includes a pencil normal (PN) section, two first pencil tapering (PT) sections, two second PT sections, and two pencil connection (PC) sections. The pencil normal (PN) section extends along a longitudinal direction thereof and having a first cross-sectional area of a constant size. The two first pencil tapering (PT) sections are tapered in such a way that cross-sectional areas decrease. Two second PT sections are tapered in such a way that the decreased cross-sectional areas increase again. The two pencil connection (PC) sections connect a first PT section and a second PT section that are adjacent to each other, and have a second cross-sectional area of a constant size. The continuous strand may implement a multi step-pencil tapering (MS-PT) effect that presents significantly improved aesthetic characteristics for a wig, without resorting to a labor-intensive manual operation.

Preforms for open structured (lattice) composite tubular members manufactured from large (i.e. high filament count) prepreg yarns on a conventional maypole braiding machine, and subsequently cured to produce fiber reinforced composites of high strength and light weight.

A metal fiber included in a fiber product includes a tungsten wire having a diameter less than or equal to 22 μm. The tungsten wire may have, for example, a diameter less than or equal to 18 μm. The tungsten wire may have, for example, a diameter within a range from 20% less than 13 μm to 20% greater than 13 μm. In addition, the tungsten wire may have, for example, a diameter greater than or equal to 5 μm. Further, the tungsten wire may include, for example, pure tungsten. Moreover, the metal fiber may be, for example, a metal thread including a false-twisted yarn which is made of a chemical fiber and is wound.

A metal fiber included in a fiber product includes a tungsten wire having a diameter less than or equal to 22 μm. The tungsten wire may have, for example, a diameter less than or equal to 18 μm. The tungsten wire may have, for example, a diameter within a range from 20% less than 13 μm to 20% greater than 13 μm. In addition, the tungsten wire may have, for example, a diameter greater than or equal to 5 μm. Further, the tungsten wire may include, for example, pure tungsten. Moreover, the metal fiber may be, for example, a metal thread including a false-twisted yarn which is made of a chemical fiber and is wound.

Braided composite yarns including one or more functional components such as conductors and one or more structural components such as para-aramid fibers, and methods of manufacture therefor. Bundles of at least one functional component and at least one structural component undergo simultaneous parallel winding under tension onto a single bobbin prior to braiding, thus reducing the mechanical loading forces on the functional components in the final yarn. The yarns can be engineered with application-specific electrical, electronic, electromagnetic, or physical properties that enable their use as electronic components or sensors, and attached to or incorporated into active textiles and composite substrates. The yarns can be directly soldered to without prior removal of insulation or other yarn components. Some yarns, such as those for use as inductors, can include a core with desired electrical properties.

Braided composite yarns including one or more functional components such as conductors and one or more structural components such as para-aramid fibers, and methods of manufacture therefor. Bundles of at least one functional component and at least one structural component undergo simultaneous parallel winding under tension onto a single bobbin prior to braiding, thus reducing the mechanical loading forces on the functional components in the final yarn. The yarns can be engineered with application-specific electrical, electronic, electromagnetic, or physical properties that enable their use as electronic components or sensors, and attached to or incorporated into active textiles and composite substrates. The yarns can be directly soldered to without prior removal of insulation or other yarn components. Some yarns, such as those for use as inductors, can include a core with desired electrical properties.

A woven fabric includes a plurality of warp and weft yarns. The yarn is formed by a combination of extra long staple cotton and Suvin cotton, which is spun together at a low speed on a ring frame. In alternate example embodiments, the yarn is formed by a combination of long staple cotton and Suvin cotton.