Disclosed herein are self-powered and multi-modal sensing wearables. The smart wearables can comprise mechano-luminescence-optoelectronic materials, which can be used for self-powered sensing and energy harvesting.

Techniques for producing an article having hollow structures are described herein. The disclosed techniques include weaving a plurality of yarns to form a woven fabric, wherein the plurality of yarns each comprise a dissolvable core, and the dissolvable core comprises polyvinyl alcohol (PVA) having a water solubility; neutralizing an alkaline before drying the woven fabric to maintain the water solubility of the PVA; and washing the woven fabric or a garment made by the woven fabric to at least partially remove the dissolvable core.

Techniques for producing an article having hollow structures are described herein. The disclosed techniques include weaving a plurality of yarns to form a woven fabric, wherein the plurality of yarns each comprise a dissolvable core, and the dissolvable core comprises polyvinyl alcohol (PVA) having a water solubility; neutralizing an alkaline before drying the woven fabric to maintain the water solubility of the PVA; and washing the woven fabric or a garment made by the woven fabric to at least partially remove the dissolvable core.

The invention addresses the problem of providing a low-breathability woven fabric and a textile product that are excellent not only in downproofness but also in stretchability. As a means for resolution, a low-breathability woven fabric having a breathability of 1.0 cc/sec/cm.sup.2 or less is configured to include a stretch fiber.

An article comprised of tape segments embroidered in place is disclosed. One embodiment includes tape segments embroidered to a self-supporting embroidered structure. Another embodiment includes tape segments embroidered together to form an embroidered lattice structure. In one embodiment, some of the tape segments may expand when exposed to heat and may be used to form cushioning regions for the article.

An article comprised of tape segments embroidered in place is disclosed. One embodiment includes tape segments embroidered to a self-supporting embroidered structure. Another embodiment includes tape segments embroidered together to form an embroidered lattice structure. In one embodiment, some of the tape segments may expand when exposed to heat and may be used to form cushioning regions for the article.

The present invention is directed to a reactive dye-dyeable polyurethane-urea elastic yarn including a reaction product of at least two polyols, a diisocyanate compound, a diamine chain extender, an amine chain terminator, and a diethylenetriamine compound, wherein one of the polyols is polyethylene glycol, which is included in an amount of 20 to 30.0 mol % based on the total amount of the polyols, a polyurethane-urea polymer includes 10 meq/kg to 45 meq/kg of primary amine ends, and the capping ratio (CR) of the diisocyanate to the polyols is 1.8 to 2.0.

A method for producing a polyacetal fiber that presents an improved whiteness unevenness is provided. According to one embodiment, there is provided a polyacetal fiber production method that yields a polyacetal fiber using an oxymethylene copolymer having a melt index, at 190° C. under a load of 2.16 kg, of 5-60 g/10 min, wherein the production method includes taking off the polyacetal fiber from the discharge nozzle of a spinning apparatus, and drawing the taken-off polyacetal fiber. The tensile elongation E1 of the polyacetal fiber after the taking off is 20%-500%; the tensile elongation E2 of the polyacetal fiber after the drawing is 10%-100%; E1≥E2; and the single fiber thickness of the polyacetal fiber after the drawing is 0.7-5.0 denier.

The present invention relates to a swimsuit 23 including an elastic polyurethane yarn. The elastic polyurethane yarn contains; 0.5 to 10 mass % of a cationic high-molecular-weight compound A having a number-average molecular weight of 2000 or more; and an inorganic chlorine deterioration inhibitor B. The mass ratio of the cationic high-molecular-weight compound A to the inorganic chlorine deterioration inhibitor B ranges from 0.3 to 3, and a silicone oil is applied to the elastic polyurethane yarn. A fabric for the swimsuit is treated with water repellent finishing. The swimsuit 23 preferably includes an elastic polyurethane yarn whose ratio of fluorine (F) to carbon (C) on the elastic polyurethane yarn is 0.030 or more in an elemental mass concentration according to scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDX). Thereby, it is possible to provide a swimsuit with high water repellency, low water retention rate, and high buoyancy.

Aspects of the present disclosure describe systems, methods, and structures for distributed acoustic sensing using multi-band time-gated digital orthogonal frequency domain reflectometry.