A polyphenylene sulfide monofilament has a phenylene sulfide unit as a main structural unit and satisfies (1) to (5): (1) a fineness of 6 to 35 dtex; (2) a breaking strength of 3.4 cN/dtex or more; (3) a breaking elongation of 24% to 45%; (4) a 5% modulus of 1.0 to 1.6 cN/dtex; and (5) a 10% modulus of 1.4 to 2.3 cN/dtex.

A fabric for a thermal protective application includes: 5-40 weight % PBI-p fiber and the balance being conventional fibers, where the fabric has equal or better flame-resistant and/or heat-resistant properties, and a fabric weight less than an equivalent fabric made with a like amount of PBI-s fiber in place of the PBI-p fibers. The fabric for a thermal protective application includes: 5-40 weight % of a blend of PBI-p fiber and PBI-s fiber, and the balance being conventional fibers, where the fabric has equal or better flame-resistant and/or heat-resistant properties and a fabric weight less than an equivalent fabric made with a like amount of PBI-s fiber in place of the PBI-p fibers.

A coaxial nanocomposite including a core, which includes fibers of a first organic polymer, and a shell, which includes fibers of a second organic polymer, the first polymer and the second polymer forming a heterojunction.

Provided is a hydrogen-dispensing hose. At least two reinforcing layers are coaxially layered between an inner surface layer of a thermoplastic resin having a dry hydrogen gas permeability coefficient at 90 C. of 110.sup.8 cc.Math.cm/cm.sup.2.Math.sec..Math.cmHg or less and an outer surface layer of a thermoplastic resin. A wire braided layer formed by braiding metal wires is used as the outermost reinforcing layer. Fiber braided layers formed by braiding high-strength fibers such as polyparaphenylene benzobisoxazole fibers are used as the other reinforcing layers.

A method of manufacturing a high-strength synthetic fiber utilizing high-temperature multi-sectional drawing, two-stage high-temperature multi-sectional drawing, or multi-stage high-temperature multi-sectional drawing. The method comprises the following steps: performing, on a synthetic resin, melt spinning or melt extrusion, cooling, multi-sectional high-temperature drawing, heat setting and a fiber surface treatment, wherein the multi-sectional high-temperature drawing comprises independently adjusting temperatures at a front section and a rear section of an furnace, and the temperature at the rear section is higher than that at the front section. The temperature adjustment is performed on different locations in the furnace and according to a crystallization orientation of a fiber molecular chain, significantly increasing fiber strength. The method is widely applicable to manufacturing of various types of fibers, enhancing application performance of the fibers.

The present application provides methods for producing polybenzimidazole carbon fiber that does not require infusibilization treatment.

A problem to be solved by the present invention is to provide a resin composition suitable for spinning, particularly electrospinning, and in addition, to provide a heat-resistant non-woven fabric having excellent strength and a method of producing the same. A main object of the present invention is: to provide a resin composition including: (a) at least one heat-resistant resin or a precursor thereof, the heat-resistant resin being selected from the group consisting of a heat-resistant resin containing a nitrogen atom and a heat-resistant resin containing, in the main chain, a group selected from the group consisting of ether group, ketone group, sulfone group, and sulfide group; (b) a solvent; and (c) a surfactant having a fluoroalkyl group; and to form a non-woven fabric using the resin composition by an electrospinning method.

Protective garments are disclosed having fabric treated with a water resistant treatment. The water resistant treatment includes a combination of a water resistant concentrate and a solvent. In accordance with the present disclosure, the water resistant treatment is substantially free of fluorocarbon chemicals and yet provides not only excellent water resistance, but also excellent breathability and comfort. The water resistant treatment may be particularly applicable for use in reapplications.

A fiber composite material includes: a heat resistant layer and a liquid guiding layer that are stacked. A material of the heat resistant layer includes a heat resistant fiber and a hydrophilic fiber. A material of the liquid guiding layer includes a hydrophilic fiber. The heat resistant fiber includes a polyimide fiber. The hydrophilic fiber includes a Tencel fiber.

A fabric for reinforcing a power transmission belt including fibers of polyarylene sulfide and a belt utilizing the fabric. The fabric may have textured or elastic core wrapped stretch yarns in the longitudinal direction. Longitudinal yarns may include PPS and textured transverse yarns include nylon. Yarns may include blends of high performance fibers and nylon or other fibers.