109results about "Wet spinning methods" patented technology

A manufacturing device of a fiber-type electrode includes: a bath including a coagulant; a transport portion including a supply roll provided outside the bath, a take-up roll provided inside the bath to be immersed in the coagulant, and a winding roll provided outside the bath, and configured to transport a fiber-type substrate; and a nozzle between the supply roll and the take-up roll. The nozzle includes a guide pipe that provides a moving passage of the fiber-type substrate, an inner main body around the guide pipe and that provides a central axis space in which an active material solution is supplied, and an outer main body around the inner main body and that provides a peripheral space in which a polymer solution is supplied.

Disclosed are improved methods for crimping tow and / or measuring the crimp of the tow (e.g., the crimp level and / or uncrimp energy). Also disclosed is tow produced using such methods. The methods can result in tow (e.g., cellulose acetate tow) that has more consistent and precise crimp than has been previously achieved.

The present invention relates to a method for air jet texturizing or air entangling a silk filament or multifilament. Further, the present invention relates to a texturized or entangled silk filament or multifilament obtained by this method. Furthermore, the present invention relates to a yarn comprising the texturized or entangled silk filament or multifilament. In addition, the present invention relates to the use of the silk filament, multifilament, or yarn in the textile industry.

The present invention relates to elastomer materials, and more precisely to an elastomer material blend of at least one polyisoprene polymer and at least one natural or synthetic polymer. The invention also relates to the method for preparing the blend and to the processing thereof by means of an electro-hydrodynamic process or an aero-hydrodynamic process, or to the combination of both processes.

To provide a method for producing cellulose fibers that can produce high-strength regenerated cellulose fibers. [Solution] A method for producing cellulose fibers, characterized by comprising: a dissolution step of dissolving cellulose in a tetraalkylammonium hydroxide solution at a temperature of less than 45°C to produce a solution; and a spinning step of extruding the solution produced in the dissolution step into a coagulation solution at a temperature of less than 15°C to spin the fibers. Furthermore, it is preferable that the content of tetraalkylammonium hydroxide in the tetraalkylammonium hydroxide solution is 50% by mass or more and 60% by mass or less, and the content of water in the tetraalkylammonium hydroxide solution is 40% by mass or more and 50% by mass or less.

A method for improving a surface structure of a regenerated cellulose fiber, including: subjecting a mixture of 3-halopropene and an imidazole-type reagent to substitution reaction to obtain an imidazole-type hydrogen bond acceptor; mixing a hydrogen bond donor, a hydrogen bond acceptor enhancer and the imidazole-type hydrogen bond acceptor to obtain a dissolving system; mixing a wood pulp and the dissolving system, and dissolving cellulose of the wood pulp to obtain a cellulose solution; and subjecting the cellulose solution to spinning with dry-jet wet spinning process to obtain a regenerated product, and drying the regenerated product to obtain the regenerated cellulose fiber; where the imidazole-type reagent has a structural formula ofR being selected from the group consisting of H, alkyl, and alkenyl.

The present application relates to the technical field of high-performance fiber materials, and particularly relates to a high-strength and high-elongation meta-aramid short-cut fiber and a preparation method thereof, the preparation method being as follows: meta-phenylenediamine, 1,3-bis(4'-aminophenoxy)benzene and isophthaloyl chloride are reacted in a solvent to obtain an oligomer A solution; p-phenylenediamine, 1,4-bis(4'-aminophenoxy)benzene and terephthaloyl chloride are reacted in a solvent to obtain an oligomer B solution; meta-phenylenediamine, the oligomer A, the oligomer B and isophthaloyl chloride are subjected to a polymerization reaction in a solvent to obtain a polymerization stock solution; an alkaline earth metal hydroxide is used to adjust the pH of the polymerization stock solution to weak alkalinity to obtain a spinning stock solution; and the spinning stock solution is subjected to wet spinning and cutting treatment to obtain the meta-aramid short-cut fiber. The meta-aramid short-cut fiber simultaneously achieves excellent performance of a breaking strength of greater than or equal to 4.5 cN / dtex and an elongation at break of greater than or equal to 40%.

The application provides a polyacrylonitrile fiber and a preparation method thereof, and the preparation method comprises the following steps: a coagulation forming step: a spinning stream is subjected to a coagulation forming treatment to obtain a nascent fiber; a washing and hot water drawing step: the nascent fiber is subjected to washing treatment and hot water drawing treatment; a post-treatment: the fiber after the hot water drawing treatment is subjected to post-treatment to obtain the polyacrylonitrile fiber; wherein the nascent fiber is guided into a washing tank by a first driving roller before the washing step; and in the washing and hot water drawing step: the nascent fiber is subjected to washing treatment and hot water drawing treatment under the traction of a second driving roller. The application produces synergy between the drawing process and equipment, improves the drawing effect, and prepares the polyacrylonitrile fiber with good compactness and high orientation.

A method for producing biodegradable fibers containing inorganic filler particles by wet spinning, prepared by dissolving a mixture of inorganic filler particles and biodegradable resin in a weight ratio of 50-80:50-20 in a good solvent and stirring the solution is filled into a syringe of a wet spinning machine and extruded downward from the discharge port of the injection needle into a collector container. The collector vessel is filled with a first poor solvent having a dissolution parameter value with a small deviation from the good solvent and a second poor solvent having a specific gravity greater than the first poor solvent and a dissolution parameter value with a large deviation from the good solvent, in two layers, top and bottom. The spinning solution extruded from the syringe outlet enters the first poor solvent in the collector container by its own weight in fibrous form, and then continuously enters the second poor solvent filled below the first poor solvent. The fibrous spinning solution injected into the second poor solvent becomes continuous long fibers and is deposited floating on the bottom of the collector container to form a cotton shape.

The application discloses a preparation method of low-grain-size polyacrylonitrile precursor. The method comprises the following steps: drying and densifying the fiber after hot water drawing and oiling through 10-25 hot rollers, wherein the hot roller pressure is 0.45-0.55 MPa, the temperature interval is 146-167 DEG C, the temperature gradient between the hot rollers is 3-5 DEG C, and then the fiber after the drying and densifying treatment is subjected to steam drawing under the steam pressure of 0.30-0.60 MPa, and the drawing ratio is 4.0-4.5 times, so as to obtain the low-grain-size polyacrylonitrile precursor. The application uses steam as the heating medium, and realizes the effective regulation of the grain size of the precursor by the low-temperature long-time drying and densifying technology and the high-multiple steam drawing technology, the regulation of the drying temperature and time of the precursor bundle, the gradual removal of the water molecules in the bundle by the outward diffusion, and the crystal rupture of the grains under the high stress by the high-multiple steam drawing.

A manufacturing process includes combining a liquid resin with a liquid reactive cross-linking composition to form a reactive core composition. The manufacturing also includes contacting the reactive core composition with a sheath composition including a carrier polymer in a solvent. The manufacturing process further includes wet spinning the reactive core composition with the sheath composition to form a sheath-core fiber including a core including at least one continuous fiber of a reaction product of the liquid resin and liquid cross-linking composition and a sheath surrounding the core. The cross-linking composition reacts with the resin during the wet spinning. The sheath includes the carrier polymer. A continuous poly(glycerol sebacate) urethane (PGSU) fiber comprising PGSU and a continuous PGSU fiber forming system are also disclosed.

The application provides a preparation method of carbon nanotube composite fiber, comprising the following steps: S1, preparation of core layer fiber: mixing to obtain polymer / carbon nanotube composite raw material, dispersing in chlorosulfonic acid to form a spinning stock solution; preparing a flexible high-thermal-conductivity core layer fiber with densification and high-orientation structure through wet spinning; S2, preparation of sheath layer: vacuum plating film is carried out on the fiber prepared in S1 to deposit a layer of insulating film on the surface of the fiber through monomer polymerization, and the carbon nanotube composite fiber is prepared. The carbon nanotube composite fiber prepared by the application has flexibility, high thermal conductivity and high resistivity, and has a very broad application prospect in the fields of thermal interface materials and electronic device thermal management materials.

The present application relates to the technical field of fiber production process control, especially to a preparation method of a high-spinnable flame-retardant lyocell fiber with precipitation resistance, comprising the following steps: S1. treating cellulose pulp and regulating hemicellulose through a low-temperature activation process; S2. selecting a flame retardant and adjusting the crystal face exposure ratio of the flame retardant; S3. uniformly mixing the treated cellulose pulp and the flame retardant; S4. then performing free radical scavenging treatment to prepare stable spinning solution; S5. performing spinning through a dry-jet wet spinning process to ensure uniformity of the yarn formation; S6. performing crosslinking treatment on the nascent fiber; and S7. performing quality detection on the finished fiber and screening qualified products. The present application precisely controls the uniform distribution of the crosslinking agent in the fiber cross section through a radial penetration lag gradient formula of the crosslinking agent, ensures the dispersion stability of the flame retardant in the spinning solution, makes the flame retardant and the cellulose molecules form a firm crosslinking combination, effectively locks the flame-retardant components, meets the long-term use requirements of textiles, and improves the safety of the products.

The present application belongs to the field of textile application, and particularly relates to a preparation method of porous (homogeneous porous) polyurethane fiber, namely, a method for constructing porous polyurethane fiber through a precipitation-induced phase separation method and normal pressure drying. The present application comprises the following steps: using a polyurethane solution as polyurethane spinning solution, using an alcohol / water mixed solution as mixed coagulation bath, and then spraying the polyurethane spinning solution into the mixed coagulation bath at a set injection speed to perform wet spinning, completing phase separation, and finally obtaining porous (homogeneous porous) polyurethane fiber with high elasticity and high thermal insulation through normal pressure drying of the obtained polyurethane gel fiber.

A method for producing biodegradable fibers containing inorganic filler particles by wet spinning, prepared by dissolving a mixture of inorganic filler particles and biodegradable resin in a weight ratio of 50-80:50-20 in a good solvent and stirring the The solution is filled into a syringe of a wet spinning machine and extruded downward from the discharge port of the injection needle into a collector container. The collector vessel is filled with a first poor solvent having a dissolution parameter value with a small deviation from the good solvent and a second poor solvent having a specific gravity greater than the first poor solvent and a dissolution parameter value with a large deviation from the good solvent, in two layers, top and bottom. The spinning solution extruded from the syringe outlet enters the first poor solvent in the collector container by its own weight in fibrous form, and then continuously enters the second poor solvent filled below the first poor solvent. The fibrous spinning solution injected into the second poor solvent becomes continuous long fibers and is deposited floating on the bottom of the collector container to form a cotton shape.

The present invention relates to antimicrobial acrylic artificial hair fibers which comprise chitosan and a nonionic surfactant, wherein: the content of chitosan extracted with diluted acetic acid is 0.005-0.4 wt%, or the content of chitosan extracted with concentrated hydrochloric acid is 0.013-1.3 wt%; the nonionic surfactant is a sorbitan fatty acid ester and a polyoxyethylene triglyceride; the content of the nonionic surfactant is 0.1-0.9 wt%; and the proportion of the sorbitan fatty acid ester in the nonionic surfactant is 20-90 wt%.

The present disclosure relates to a method for producing keratin fibers, for example, a continuous production method. In some embodiments, the production method described herein may include extruding a keratin solution into a first solution to form a first fiber, stretching the first fiber and oxidizing the first fiber to form a treated fiber, stretching the treated fiber one or more times and oxidizing the treated fiber, and curing the treated fiber to form the keratin fiber. Such a production method may be useful for producing keratin fibers with a high draw ratio.

A method for producing a cellulose fiber includes dissolving cellulose in a tetraalkylammonium hydroxide solution having a temperature of less than 45° C. to form a dissolution liquid and spinning the dissolution liquid by discharging the dissolution liquid formed by the dissolving into a coagulation liquid having a temperature of less than 15° C.

An alginate-based fiber is made of a composition comprising an alginate, a cellulose and a polyol plasticizer, such as glycerol. The fiber is produced through extrusion in a curing bath containing calcium. The fiber provides excellent strength and flexibility in its unhydrated state for textile applications. The fiber can be used to produce textiles as compostable alternatives to petrochemical based polymers.

The present disclosure is directed to systems and methods for synthesizing a spidroin. In some embodiments, the methods comprise synthesizing a monomer in vivo in a heterologous host, the monomer comprising an N-terminus IntC domain and a C-terminus IntN domain, and post-translationally polymerizing the synthesized monomer via in vitro split-intein mediated polymerization.

The present application relates to the technical field of functional fiber material, in particular to a preparation method of double-core moisture-conducting functional fiber, comprising the following steps: S1, preparing inner core spinning solution, outer core spinning solution and skin layer spinning solution respectively; S2, first, the inner core spinning solution obtained in step S1 is subjected to wet spinning, and then the obtained inner core fiber is subjected to cooling, stretching and heat setting to obtain the inner core fiber; the inner core fiber is passed through the center of a ring-shaped jet orifice covering head of a single-screw extruder, the outer core spinning solution obtained in step S1 is subjected to melt extrusion, and then the obtained outer core layer is subjected to cooling, stretching and heat setting to obtain a double-core fiber; the double-core fiber is introduced into the center of the ring-shaped jet orifice covering head again, the skin layer spinning solution obtained in step S1 is subjected to melt extrusion and uniformly coated on the surface of the double-core fiber, and then the obtained double-core fiber is subjected to cooling, stretching and heat setting to obtain a double-core moisture-conducting functional fiber. The double-core moisture-conducting functional fiber prepared by the present application has the advantages of high moisture-conducting efficiency and strong one-way transmission capacity.

The present invention relates to a method for producing fibers, comprising the steps of preparing a dope containing lignin dissolved in a dope solvent and an additive polymer, wherein the dope solvent contains an ionic liquid and water; and extruding the spinning dope into a coagulation bath to obtain one or more fibers.

The present invention relates to a method for producing fibers, which includes a step of preparing a spinning dope containing a dope solvent, lignin dissolved in the dope solvent, and a carbon nanomaterial dispersed in the dope solvent, wherein the dope solvent contains an ionic liquid and optionally further contains water; and a step of extruding the spinning dope into a coagulation liquid to obtain one or more fibers.

This invention relates to the field of chemical fiber manufacturing technology, and particularly to a polyacrylonitrile precursor fiber and its preparation method, as well as polyacrylonitrile-based pre-oxidized fibers and polyacrylonitrile-based carbon fibers. The method for preparing polyacrylonitrile precursor fiber provided by this invention involves dissolving polyacrylonitrile in a solvent to obtain a spinning solution; mixing dimethyl sulfoxide with water to prepare a basic coagulation bath, and introducing a zinc source and an ammonia-based coagulation agent to maintain the pH of the coagulation bath at 9.5-10.5, obtaining a zinc-ammonia coordination coagulation bath; spraying the spinning solution into the above zinc-ammonia coordination coagulation bath to coagulate and form nascent fibers; then washing, hot water drawing, oiling, drying and densifying, and steam drawing of the nascent fibers to obtain polyacrylonitrile precursor fiber. This invention can effectively improve the mechanical properties, structural stability, and pre-oxidation effect of polyacrylonitrile precursor fiber.