A braid includes a plurality of metal-plated bundles braided to each other, each of the metal-plated bundle having a flattened shape. Each of the metal-plated bundle includes a plurality of tensile strength fibers, a plurality of first metal plating portions that are formed on the tensile strength fibers respectively, and a second metal plating portion including the first metal plating portions therein, the first metal plating portions having the tensile strength fibers respectively.

A nonwoven fabric useful for forming composite panels includes specific amounts of reinforcing fibers, a polyimide, and a block polyestercarbonate-polysiloxane. The nonwoven fabric has a density of 0.03 to 0.2 gram/centimeter.sup.3, an areal density of 100 to 400 gram/meter.sup.2, and a tensile modulus of 50 to 1000 megapascals. Also described are a method of forming the nonwoven fabric, a composite formed from the nonwoven fabric, and a method of forming the composite.

A method for producing a woven heat exchanger, includes providing a plurality of microchannel tubes for insertion into a weaving apparatus and weaving the plurality of microchannel tubes within a central region of the heat exchanger by the weaving apparatus. The method further includes merging the plurality of woven microchannel tubes within a first and second end region arranged on the central region for producing a first and second end portion having a circular cross-section. The method further includes gluing the plurality of woven and merged microchannel tubes within the first and second end region and shortening the plurality of weaved, merged, and glued microchannel tubes within the first and second end region.

A method for preparing an asymmetric wettable polyimide fiber-based photothermal aerogel is provided. The method includes the steps: uniformly mixing polyimide powder and a solvent, then, performing electrostatic spinning, and cutting an obtained fiber felt into pieces for later use; mixing the broken fibers, polyamic acid and tert-butyl alcohol, then, performing shearing to form a stable dispersion liquid for low-temperature directional freezing, and performing freeze-drying and high-temperature thermal imidization to obtain a polyimide fiber-based aerogel material; and soaking the above aerogel material in a hydrophilic monomer solution for a polymerization reaction, and then performing low-temperature directional freezing and freeze-drying to obtain a hydrophilic polyimide fiber-based aerogel. The aerogel is placed under light source irradiation, and dropwise coating is performed on an upper surface of the aerogel with a hydrophobic filler resin mixed solution to obtain the asymmetric wettable fiber-based photothermal aerogel.

The invention relates to a woven fabric comprising a weft yarn and at most two warp yarns A and B, wherein the weft yarn comprises a high performance fiber; the warp yarn A comprises at least 50 wt % of a natural fiber; the warp yarn B comprises a high performance fiber; and wherein the fabric has an outside layer comprising the warp yarn A and an inside layer comprising the warp yarn B and said outside and inside layers being at least partially interconnected by the weft yarn. The invention also relates to products comprising said woven fabric such as clothing, lining, sport apparel, gloves, curtains, upholstery fabric and floor covering.

A protective woven fabric of the present invention includes super fiber yarns. The warp of the woven fabric is a covered yarn (1, 4, 5) composed of two or more twisted inorganic filament yarns as core yarns (2a, 2b) and one or more super fiber yarns (3, 3a, 3b, 3c) as covering yarns that are wound and twisted around the core yarns (2a, 2b), and a weft thereof is a super fiber yarn. Preferably, the covered yarn is a W covered yarn in which a twist coefficient K of the covering yarns with respect to the core yarns is 2000 to 30000. Due to this, it is possible to provide a protective woven fabric that, even when the warp and the weft is squeezed or rubbed by the reed, heddles, etc., of a loom, has few defects such as fluff or fiber aggregates and which has a satisfactory weaving pattern while retaining a high protective function. A force required to cut this woven fabric is 50 N or more, preferably 60 N or more, as measured through a cutting test in accordance with JIS-T8052, even when the fabric is a monolayer woven fabric.

Provided is a flame-retardant fabric having a color that satisfies the criteria required by the international standard for high visibility ISO20471. The fabric includes polyetherimide-based fibers that contain a white pigment.

A composite comprises a reinforcing fabric and an at least partially cured composition at least partially coating the reinforcing fabric, wherein the reinforcing fabric comprises first fibers wrapped with, woven with, or wrapped and woven with polyimide fibers, and the at least partially cured composition comprises the product of 30 to 70 weight percent of a poly(phenylene ether) having a number average molecular weight of 600 to 2000 AMU, 30 to 70 weight percent of a curable component, and a curing agent, wherein weight percent is based on the combined weight of poly(phenylene ether) and the curable component.

Disclosed is a method for preparation and activation of a super hydrophobic electret nanofibrous filter material for cleaning PM2.5, comprising the steps as follows: (1) dissolving polymer powders and resin into a corresponding solvent so as to prepare a polymer solution, then stirring on a magnetic stirrer and standing for use; (2) in order to reinforce the electrostatic effect of the fiber, before preparing the polymer solution, adding in organic electret nanoparticles into the solvent, then oscillating with an ultrasonic oscillator; (3) in order to reinforce the super hydrophobic effect of the filter, spraying a low surface energy solution on the prepared nanofiber with a designed nozzle to carry out modification.

An article comprising a fabric comprising: (a) a blended yarn comprising: (i) from about 10% to about 85% by weight of at least one biregional fiber comprising an oxidized polymer selected from the group consisting of acrylonitrile based homopolymers, acrylonitrile based copolymers, acrylonitrile based terpolymers, and combinations thereof; (ii) at least one companion fiber selected from the group consisting of FR polyester, FR nylon, FR rayon, FR treated cellulose, m-aramid, p-aramid, modacrylic, novoloid, melamine, wool, nylon, regenerated cellulose, polyvinyl chloride, antistatic fiber, poly(p-phenylene benzobisoxazole) (PBO), polybenzimidazole (PBI), polysulphonamide (PSA), and combinations thereof; and (b) optionally including a companion yarn different from said blended yarn; wherein said companion yarn includes p-aramid in an amount less than 20% of the fabric weight; and wherein the fabric has a weight from about 3 oz/yd.sup.2 to about 12 oz/yd.sup.2.