Systems and methods for fibrous material manufacturing are provided. The methods include dispensing a first stream of a solution (that includes a crosslinkable material) from first nozzle(s) into a bath containing a liquid (that includes a first material). The first nozzle(s) are submerged in the liquid. The methods include dispensing a second stream from second nozzle(s) also submerged in the liquid. The second stream(s) are configured to elongate and thin the first stream(s). The second stream contain a liquid. The liquid includes a second material, which may be the same, or may be different, form the first material. The methods include forming a fibrous material by crosslinking the crosslinkable material in the first stream (e.g., using a light source to cross-link a photo-crosslinkable material in the stream).

Systems and methods for fibrous material manufacturing are provided. The methods include dispensing a first stream of a solution (that includes a crosslinkable material) from first nozzle(s) into a bath containing a liquid (that includes a first material). The first nozzle(s) are submerged in the liquid. The methods include dispensing a second stream from second nozzle(s) also submerged in the liquid. The second stream(s) are configured to elongate and thin the first stream(s). The second stream contain a liquid. The liquid includes a second material, which may be the same, or may be different, form the first material. The methods include forming a fibrous material by crosslinking the crosslinkable material in the first stream (e.g., using a light source to cross-link a photo-crosslinkable material in the stream).

In a nanofiber structure in which a nanofiber A and a nanofiber B are tangled with each other, the softening point of the nanofiber A is different from that of the nanofiber B, a cross-section along a surface of the nanofiber A orthogonal to a longitudinal direction thereof has a shape having a concave portion, and the nanofiber A and the nanofiber B are fused with each other at this concave portion.

A composition for producing a fiber, containing (A) a polymer compound containing a unit structure represented by the formula (1) and a unit structure represented by the formula (2), (B) a crosslinking agent, (C) an acid compound, and (D) a solvent

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wherein each symbol in the formulas (1) and (2) is as described in the DESCRIPTION.

A composition for producing a fiber, containing (A) a polymer compound containing a unit structure represented by the formula (1) and a unit structure represented by the formula (2), (B) a crosslinking agent, (C) an acid compound, and (D) a solvent

##STR00001##

wherein each symbol in the formulas (1) and (2) is as described in the DESCRIPTION.

Methods of making polycationic nanofibers by grafting cationic polymers onto electrospun neutral nanofibers and polycationic nanofibers produced by the methods are provided herein. In addition, methods of using the polycationic nanofibers to reduce inflammation, to adsorb anionic compounds such as heparin or nucleic acids, to inhibit the growth of microbes or inhibit the formation of a biofilm are also provided. The polycationic nanofibers may be in a mesh and may be included in a medical device, wound dressing, bandage, or as part of a graft.

The present disclosure relates to a flame-retardant fabric that includes a modacrylic fiber and a cellulose fiber. The cellulose fiber is one or more selected from a regenerated cellulose fiber and a natural cellulose fiber. The flame-retardant fabric contains the modacrylic fiber in an amount of 65 to 90 wt % and the cellulose fiber in an amount of 10 to 35 wt % with respect to the overall weight of the fabric. The modacrylic fiber contains a magnesium compound inside the fiber. The flame-retardant fabric contains the magnesium compound in an amount of 2.5 to 4.5 wt %. Afterflame time and afterglow time of the flame-retardant fabric measured using a flammability test based on ISO 15025: 2000 are 2 seconds or less and 2 seconds or less, respectively.

The present disclosure relates to a flame-retardant fabric that includes a modacrylic fiber and a cellulose fiber. The cellulose fiber is one or more selected from a regenerated cellulose fiber and a natural cellulose fiber. The flame-retardant fabric contains the modacrylic fiber in an amount of 65 to 90 wt % and the cellulose fiber in an amount of 10 to 35 wt % with respect to the overall weight of the fabric. The modacrylic fiber contains a magnesium compound inside the fiber. The flame-retardant fabric contains the magnesium compound in an amount of 2.5 to 4.5 wt %. Afterflame time and afterglow time of the flame-retardant fabric measured using a flammability test based on ISO 15025: 2000 are 2 seconds or less and 2 seconds or less, respectively.

The present invention relates to the field of textiles, in particular shape-memory polymeric fibers (SMPF) for textile applications or medical applications where shape fixity and recovery can be kept constant over multiple shape-memory cycles. The present invention relates to a covered shape-memory polymeric fiber (cSMPF) (1) having a core fiber (10) comprising a shape-memory polymer fiber and a substantially unstretchable covering yarn (20) wound around the core fiber (10) in a manner that the maximum engineering strain (.sub.max) of the core shape-memory fiber is reduced to at most the strain at the yield point (.sub.yield) of the uncovered core fiber (10) thus limiting the stretchability or deformation of the core shape-memory fibers and/or textiles and/or fabrics comprising a covered shape-memory fiber during programming or use so as to ensure maximum recoverable strain. Also disclosed is a process for producing a covered shape-memory polymeric fiber (cSMPF) (1), a shape-memory fiber and a shape-memory textile comprising a covered shape-memory polymeric fiber (cSMPF).

The present invention relates to the field of textiles, in particular shape-memory polymeric fibers (SMPF) for textile applications or medical applications where shape fixity and recovery can be kept constant over multiple shape-memory cycles. The present invention relates to a covered shape-memory polymeric fiber (cSMPF) (1) having a core fiber (10) comprising a shape-memory polymer fiber and a substantially unstretchable covering yarn (20) wound around the core fiber (10) in a manner that the maximum engineering strain (.sub.max) of the core shape-memory fiber is reduced to at most the strain at the yield point (.sub.yield) of the uncovered core fiber (10) thus limiting the stretchability or deformation of the core shape-memory fibers and/or textiles and/or fabrics comprising a covered shape-memory fiber during programming or use so as to ensure maximum recoverable strain. Also disclosed is a process for producing a covered shape-memory polymeric fiber (cSMPF) (1), a shape-memory fiber and a shape-memory textile comprising a covered shape-memory polymeric fiber (cSMPF).