A knit fabric production method includes a step of producing a knit fabric K1 from an untwisted yarn Y0 while producing the untwisted yarn Y0 by disposing a fiber bundle FB around a linear core member CP formed of a soluble polymer, falsely twisting the fiber bundle FB by using an air flow swirling in a predetermined first direction and simultaneously causing open end fibers OF to adhere to an outer circumferential surface of the falsely twisted fiber bundle FB by using an air flow swirling in a second direction opposite the first direction, and untwisting the falsely twisted fiber bundle FB.

A tubular woven fabric is useful as a transport hose for a fluid or a powder, as a protective hose for linear bodies such as wires, cables and conduits, as a tubular filter, or as a base material of a vascular prosthesis. The tubular woven fabric includes warp yarns and weft yarns interwoven with each other, the tubular woven fabric having an outer diameter with a variation of within 10% along the warp direction and satisfying the formula:
(L2−L1)/L1≤0.1.

Device for the production of nanofibrous and/or microfibrous layers having an increased thickness uniformity by spinning a liquid material (3), said device comprising: a collecting electrode (6), a spinning nozzle (1) for dispensing the liquid material (3) to be spun, an assembly for guiding the collecting electrode (6) and/or for guiding a base strip (5) along the collecting electrode (6) or adjacent to it, such that—in the area faced by the outlet orifice (10) of the spinning nozzle (1)—the collecting electrode (6) and/or the base strip (5) move(s) in the direction (MD) spaced from the outlet orifice (10) of the spinning nozzle (1), a power supply for generating a voltage of 10 to 150 kV between the collecting electrode (6) and the spinning nozzle (1), at least one body (2), which moves along the liquid surface to destabilize the locations of the points where fibres (4) are formed on the surface of the liquid material (3) at the outlet orifice (10) of the spinning nozzle (1). The nanofibrous and/or microfibrous layers having an increased thickness uniformity are produced by spinning a liquid material (3) in an electrostatic field, wherein a body (2) is moved along the surface of the spun liquid in order to destabilize positions of locations, where the fibers originate.

Described herein are nanofibers and methods for making nanofibers that include any one or more of (a) a non-homogeneous charge density; (b) a plurality of regions of high charge density; and/or (c) charged nanoparticles or chargeable nanoparticles. In one aspect, the present invention fulfills a need for filtration media that are capable of both high performance (e.g., removal of particle sizes between 0.1 and 0.5 μm) with a low pressure drop, however the invention is not limited in this regard.

A composite low-twist towel that is formed of three parts: terry yarn, ground warp yarn and weft yarn. The ground warp yarn and the weft yarn are normal towel yarns and the terry yarn is a composite low-twist yarn. The composite low-twist yarn is composed of two yarns of different thickness, among them, the spun yarn is synthetic fiber spun yarn or filament yarn, and the thick yarn is the pure cotton yarn or the blended yarn of pure cotton and other fibers. The composite low-twist yarn is made into a warp beam through warping and sizing. Then, it interweaves with ground warp yarns and weft yarns through a towel loom or warp loom to form terry fabrics.

Processes for making fibrous structures and more particularly processes for making fibrous structures comprising filaments are provided.

Disclosed are a highly absorbent composite fiber, a highly absorbent non-woven fabric, and an article including the non-woven fabric. The disclosed highly absorbent composite fiber includes: a core including a polyolefin-based resin; and a sheath including ethylene vinyl alcohol (EVOH) resin.

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 provides an enhanced electrospun film made from polyvinylidene fluoride (PVDF) and at least one low-melting-point polymer in a ratio of 99.9:0.1-90:10 by weight, and the low-melting-point polymer having a melting point lower than the polyvinylidene fluoride and a softening point in the range of 110-140 C°. The enhanced electrospun film exhibits excellent mechanical properties, higher moisture permeability and hydrostatic pressure resistance. The invention further provides a method for manufacturing the enhanced PVDF electrospun film, and use of the enhanced PVDF electrospun film in preparing a waterproof and moisture permeable product.

The invention provides an antimicrobial fiber which exhibits excellent antimicrobial properties even without the addition of antimicrobial agents and can remain antimicrobial even after repeated washing. The antimicrobial fiber comprises a fiber having on a surface thereof a polyacetal copolymer (X) containing oxyalkylene groups, the molar amount of oxyalkylene groups in the polyacetal copolymer (X) being 0.2 to 5 mol % relative to the total of the molar amount of oxymethylene groups and the molar amount of oxyalkylene groups.