27results about "Monocomponent cellulose artificial filament" patented technology

This disclosure relates to lyocell materials, smoking articles including the thereof, and methods for preparing said lyocell materials, wherein the lyocell materials can be prepared from a stock solution comprising a cellulose slurry and N-methylmorpholine-N-oxide (NMMO), wherein the cellulose slurry can have a CED viscosity of 4.0 to 11.0, a hemicellulose content of less than 5% by weight, an Fe content of at least 1 ppm and less than 30 ppm by weight, and a Si content of at least 1 ppm and less than 100 ppm by weight.

The application discloses high-whiteness lignin-rich cellulose nanofiber and a preparation method and application thereof. The method comprises the following steps: pretreating wood fiber raw materials by dilute sulfuric acid, removing at least part of hemicellulose and amorphous carbohydrates in the raw materials, relatively enriching lignin in the solid phase; then, performing bleaching treatment by alkaline hydrogen peroxide, reducing the content of color groups in the lignin and retaining more lignin structure; finally, performing mechanical nanofibrillation treatment, obtaining high-whiteness lignin-rich cellulose nanofiber with a lignin content of 15% to 30% and a whiteness of 60 to 90. The obtained nanofiber has the ultraviolet shielding capability in the 200-400 nm wave band while improving the whiteness and maintaining a high lignin content, and when about 5% of the nanofiber is added into a sunscreen composition, the sunscreen index of the sunscreen composition is 34-40, and the nanofiber has the dispersion performance in a non-polar solvent. The material can be used for preparing a barrier film, an ultraviolet shielding film and a sunscreen composition.

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.

This invention relates to the field of functional fabric technology, specifically to a hybrid fiber with phase change temperature control fiber and its preparation method. The raw materials for preparing the hybrid fiber, by weight, consist of 70-80 parts polymer matrix, 13-21 parts phase change material, 3-5 parts polyethylene glycol-b-polyglycidyl methacrylate (PEG-b-GMA), 0.6-1.5 parts KH-580, 0.3-1 parts thermally conductive reinforcing phase, and 0.5-1.2 parts functional auxiliaries; the thermally conductive reinforcing phase is micron-sized boron nitride modified with a silane coupling agent using a wet process. This invention, through the synergistic effect of PEG-b-GMA and the anchoring agent KH-580, can simultaneously solve the problems of poor dispersion, easy leakage of phase change material, and poor mechanical properties in existing blended spinning phase change temperature control fibers. The improved fiber properties can meet the requirements of industrial weaving. This invention uses conventional blended spinning processes, requires no additional specialized equipment, has controllable auxiliary agent costs, is simple to operate, and is easy to implement on existing production lines.

Systems and methods are provided that involve a subcritical water reaction to recycle the cellulose and polyester components of waste cotton and cotton / polyester blend textiles that would otherwise be discarded or disposed of. Specifically, the disclosed methods provide for treatment of the waste textiles to produce advanced materials including cellulose and terephthalic acid (TPA) with a low environmental impact. The cellulose and TPA that are produced are of a high quality allowing for production of regenerated cellulose and regenerated polyethylene terephthalate (PET) suitable for fiber spinning and textile applications.

A material for manufacturing addition-extrusion-based parts, comprising a volume percent of a sinterable filler, b volume percent of thermoplastic cellulose, and c volume percent of an additive, where a is in the range of 20-70, b is in the range of 75-30, and c = (100-ab).

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.

This utility model discloses a system for preparing lyocell fiber spinning dope by modifying wood pulp, including an enzymatic purification kettle, a first washing kettle, a bleaching and impurity removal kettle, a second washing kettle, a pulverizer, a pulper, and a thin-film evaporator. The enzymatic purification kettle is connected to a first connecting pipe, which is equipped with a first delivery pump and a first press. The first press is connected to the first washing kettle, which is connected to a second connecting pipe. The second connecting pipe is equipped with a second delivery pump and a second press, which is connected to the bleaching and impurity removal kettle. The bleaching and impurity removal kettle is connected to a third connecting pipe, which is equipped with a third delivery pump and a third press. The third press is connected to the second washing kettle, which is connected to a fourth connecting pipe. The fourth connecting pipe is equipped with a fourth delivery pump and a fourth press. The fourth press, pulverizer, and pulper are connected in sequence. The pulper is connected to a fifth connecting pipe, which is connected to the thin-film evaporator via a screw delivery pump.

The application discloses a preparation method of regenerated cellulose fibers, and belongs to the technical field of regenerated cellulose fibers. In view of the problems of easy fibrillation of existing fibers, brittleness caused by cross-linking modification, and insufficient strength and heat resistance, the application adopts an eight-arm hyperbranched polyhedral oligomeric silsesquioxane cross-linking modifier to blend with cellulose pulp, N-methyl morpholine-N-oxide aqueous solution, antioxidant and spinning aid to prepare a spinning dope, and the fibers are prepared through dry-jet wet spinning and post-processing. The modifier is cross-linked with the hydroxyl groups of cellulose through the epoxy groups to form a three-dimensional network, and the rigid POSS core and the flexible polyether arm are combined, so that the fibrillation is inhibited while the flexibility is maintained, the wet strength and heat resistance are significantly improved, and the technical bottleneck that the traditional modification cannot simultaneously consider the strength and toughness is solved.

The invention relates to a method for manufacturing cellulosic slurry for man-made cellulosic fiber production having a main process (100), the main process (100) comprising method steps of -providing pulp slurry (101), -dewatering (102) the pulp slurry at least partly to form pulp mass, -opening (108) the pulp mass for producing pulp with loosened cellulosic fibers, -drying (109) the pulp with loosened cellulosic fibers in a flash dryer (11-17) to form fluffy pulp, -mixing (107) the fluffy pulp in a mixer (18; 20) with a cellulose-swelling or dissolving medium to form cellulosic slurry for man-made cellulosic fiber production. The invention relates also to an apparatus (10) for manufacturing cellulosic slurry for man-made cellulosic fiber production.

The application discloses a multifunctional resin microsphere and a preparation method and application thereof. In the field of functionalization of regenerated cellulose fiber blending spinning, in view of the problems of high raw material cost, complex synthesis process, poor dispersibility, low process adaptability and the like of functional additives, the application takes cheap and readily available melamine, amino-containing organic acid, hindered amine and aldehyde compound as raw materials, and under the condition of not adding a surfactant, a series of resin microspheres with controllable particle size and regular morphology are conveniently and efficiently synthesized by one-pot method. The microspheres are excellent in acid and alkali resistance, solvent resistance and heat resistance, and have high Zeta potential in a wide pH range, so that the dispersion stability of the microspheres in water is outstanding. In the process of spinning of regenerated cellulose fiber, the microspheres have good dispersibility and are not prone to agglomeration, and are especially suitable for lyocell spinning process. The melamine resin skeleton and the organic acid group cooperated with the hindered amine structure simultaneously endow the fiber with functions such as antibacterial property, flame retardancy and odor removal.

The present application relates to the field of regenerated cellulose fiber preparation, in particular to a use of a polymer in the preparation of lyocell fiber. The polymer is used to stabilize the cellulose spinning solution with N-methylmorpholine-N-oxide (NMMO) as solvent, so as to improve the thermal stability and / or color of the cellulose spinning solution under heating conditions. The polymer is a lactone polymer or a salt thereof, comprising at least one specific structure of repeating units (I), (II), (III) and / or (IV), and the number average molecular weight is 500 Da-500,000 Da. By adding the polymer to the cellulose spinning solution in the cellulose dissolution stage and / or the spinning solution maturation stage, the cellulose main chain rupture, the thermal degradation and / or oxidative degradation of NMMO solvent and the free radical initiated degradation reaction can be effectively inhibited, so as to reduce the spinning solution viscosity attenuation and the color increase, and improve the stability of the lyocell fiber preparation process and the consistency of the finished fiber quality.

This invention discloses a plant-based cellulose nanofiber, its green preparation method, and its application, belonging to the field of biomass cellulose nanofiber preparation technology. The cellulose nanofiber is obtained by pretreating plant raw materials with a eutectic solvent and Fenton's reagent, followed by high-intensity ultrasonic treatment. The plant-based cellulose nanofiber has a surface carboxyl group content >0.4 mmol / g and a crystallinity >50%. The zeta potential of the plant-based cellulose nanofiber suspension is <-35 mV. The cellulose nanofiber prepared by this invention has a high surface carboxyl group content and can increase crystallinity by more than 3 times. When applied to nanofiber films, it can significantly increase the mechanical properties of the films and impart good water stability and biodegradability. The preparation method is simple, easy to implement, and uses mild reaction conditions. The eutectic solvent used is environmentally friendly and can be reused more than 7 times after simple recycling, enabling continuous industrial production with low production input.

The application discloses aile lyocell fiber, a preparation method and application, wherein the preparation method comprises the following steps: obtaining ailao powder from fresh ail leaves; under fermentation conditions, the ailao powder is fermented by microorganisms to selectively degrade lignin and hemicellulose in the ail leaves, and an ail leaf cellulose pulp rich in active ingredients is obtained; the ail leaf cellulose pulp is subjected to auxiliary hydrolysis by sodium chlorite and sodium hydroxide to obtain purified ail leaf cellulose; the purified ail leaf cellulose is dissolved in N-methyl morpholine-N-oxide aqueous solution, an antioxidant and an alkaline adjusting agent are added, and a spinning dope is obtained; and the spinning dope is subjected to post-treatment to obtain the ail lyocell fiber. The application provides the ail lyocell fiber, the preparation method and the application, adopts a microbial fermentation technology as a core, and realizes efficient extraction of cellulose and in-situ reservation of natural active ingredients under mild conditions by screening of efficient composite microbial flora for directional degradation of lignin and hemicellulose in the ail leaves.

The application provides a kind of identifiable traceable regenerated cellulose fiber and its preparation method, relating to the field of regenerated cellulose fiber.The preparation method of the identifiable traceable regenerated cellulose fiber includes the following steps: preparing identification traceable marker dispersion system, preparing blending spinning dope, preparing identifiable traceable regenerated cellulose fiber;The preparation of the identification traceable marker dispersion system includes the following steps: preparing carbon quantum dots composite acetylacetone terbium, grinding and dispersing, microcapsule coating.The identifiable traceable regenerated cellulose fiber of the application can not only be qualitatively identified, but also effectively realize quantitative detection of regenerated cellulose fiber, and can determine the amount of regenerated cellulose fiber in downstream woven or non-woven products;It can also maintain good qualitative identification and quantitative traceability performance for a long time.

The application belongs to the technical field of fiber preparation, and particularly relates to a coagulation bath and application method and regeneration method thereof. The application provides a coagulation bath, which comprises coagulation bath 1 or coagulation bath 2; the coagulation bath 1 comprises H2CO3 and / or X2CO3; the coagulation bath 2 comprises H2SO3 and / or Y2SO3; X and Y independently comprise at least one of Li, Na, K, Rb, Cs, Fr and NH4. The coagulation bath provided by the application has moderate coagulation speed, low reagent cost and small corrosion, and is beneficial to the formation of regular structure of fibers in the coagulation process, thereby improving the quality of fibers.

The present invention pertains to a recycled cellulose fiber that includes recycled natural cellulose microparticles, the median diameter of the recycled natural cellulose microparticles being 0.5-10 µm, inclusive. The recycled cellulose fiber including the recycled natural cellulose microparticles can be produced, for example, by extruding in a spinning bath, using a nozzle, a spinning solution obtained by adding an aqueous dispersion of the recycled natural cellulose microparticles having a median diameter of 0.5-10 µm, inclusive, to a spinning raw solution including cellulose, spinning and coagulating the solution, and generating the fiber. It is thereby possible to conserve resources and provide a recycled cellulose fiber including recycled natural cellulose that has good spinning properties, a method for manufacturing same, and a fiber structure including said fiber.

This invention relates to the field of fiber preparation, specifically disclosing a method for preparing high-purity regenerated cellulose fibers from waste cotton textiles. The method includes: washing and crushing the waste cotton textiles, followed by sequential low-temperature plasma surface activation treatment and enzymatic oxidation decolorization using a laccase-mediator system to obtain activated and decolorized cotton fiber raw materials; then dissolving the raw materials in an ionic liquid solvent at below 80°C to obtain a spinning solution; and finally, through spinning and post-treatment, obtaining regenerated cellulose fibers. This invention achieves deep chemical degradation of covalently bound dyes through the synergistic effect of low-temperature plasma and the laccase-mediator system, while simultaneously effectively inhibiting the thermal degradation of cellulose through low-temperature ionic liquid dissolution. The resulting fibers have high purity and excellent mechanical properties, and the solvent can be recycled, making the process green and environmentally friendly.

The present application discloses a kind of regenerated cellulose fiber containing melanin and a preparation method thereof.The regenerated cellulose fiber of the present application contains uniformly dispersed melanin inside, and the mass ratio of melanin to cellulose is preferably 0.005-0.2:1.The present application creatively disperses and firmly combines melanin inside the fiber, and for the first time solves the technical problem that the color fastness of the melanin coating and color master batch in the prior art gradually loses with use and washing.The anti-ultraviolet performance of the fiber does not gradually decrease during use, and the influence of the medium material on the appearance, color and texture of the fiber is also avoided.The regenerated cellulose fiber of the present application is particularly suitable for preparing high-performance biomass fiber materials with anti-ultraviolet and anti-radiation effects.

The application discloses a method for preparing Lyocell fiber by using low polymerization degree pulp and the fiber, and comprises the following steps: (1) preparing low polymerization degree pulp with an average polymerization degree of 200-450 by carrying out depolymerization treatment on pulp with high polymerization degree; (2) mixing the low polymerization degree pulp with NMMO aqueous solution, and controlling high solid-liquid ratio, low temperature and low vacuum pressure to carry out dissolution, so as to prepare high-fiber-concentration spinning dope; (3) carrying out defoaming and filtering on the high-fiber-concentration spinning dope, and carrying out spinning by means of dry-jet wet process at high spinning speed, so as to prepare Lyocell fiber; the cellulose concentration of the high-fiber-concentration spinning dope is 13%-20%. By lowering the polymerization degree of the pulp, the application increases the dissolution activity of the cellulose, so that the cellulose concentration and the spinning speed are improved to improve the production efficiency, and the production cost of the Lyocell fiber is greatly reduced.

Various techniques for generating nanocellulose are described. An example method includes generating a first material by performing alkaline peroxide pulping on heterogenous biomass; generating a second material by removing at least a portion of a dissolved lignin fraction from the first material; and generating a third material by performing mechanical fibrillation on the second material. A fourth material is generated by performing an oxidation pretreatment on the third material. A fifth material is generated by performing mechanical fibrillation on the fourth material. The fifth material includes lignocellulosic microfibrils (LCMF) having a dimension in a range of about 10 to about 1,000 nanometers (nm) and / or lignocellulosic nanofibrils (LCNF) having a dimension in a range of about 1 to about 10 nm.

This invention provides a method for producing regenerated cellulose from a mixture of superabsorbent resin and pulp fibers, which are generated as so-called scraps in the manufacturing process of absorbent materials for absorbent articles. [Solution] The present invention provides a method for producing regenerated cellulose, comprising the steps of: dissolving the pulp fibers by mixing a mixture of a water-absorbent resin and pulp fibers with an ionic liquid; preparing a pulp fiber solution by separating the water-absorbent resin from a liquid containing the water-absorbent resin and dissolved pulp fibers; and regenerating cellulose from the pulp fiber solution, wherein the ionic liquid is a salt made of an acid with an acid dissociation constant of 4.26 or higher at 25°C in water, and the mixture of the water-absorbent resin and pulp fibers is characterized in that when the mixture containing the water-absorbent resin and pulp fibers is sucked onto the outer surface of a suction drum and deposited to produce an absorbent body, the material that falls out from the outer surface of the suction drum is used.

According to an example aspect of the present invention, there is provided a method for producing bimodal and / or multimodal cellulose materials, such as films and filaments, which combine the benefits of cellulosic raw materials having different average molecular weight distribution and / or side chain length.

The present invention relates to a composite material comprising at least one textile commodity polymer and protein fibers comprising at least one amyloid structure. The invention also relates to a method for preparing such a material, as well as to the use of such a material for adsorbing a pollutant or extracting metal ions.

According to an example aspect of the present invention, there is provided a method for producing bimodal and / or multimodal cellulose materials, such as films and filaments, which combine the benefits of cellulosic raw materials having different average size (degree of polymerization) and / or molecular weight distribution.

The present application relates to lyocell material, filter for smoking articles comprising lyocell material, and smoking articles. The lyocell material and filter for smoking articles according to the present application can replace the cellulose acetate material and filter in the prior art.

The present invention relates to a process for obtaining cellulose pulp from textiles, to the cellulose pulp obtained by the disclosed process, and to the further processing and use thereof.