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69 results about "Lyocell" patented technology
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Lyocell is a form of rayon which consists of cellulose fibre made from dissolving pulp (bleached wood pulp) using dry jet-wet spinning. It was developed beginning in 1972 by a team at the now defunct American Enka fibers facility at Enka, North Carolina. This development was recognised by the American Association of Textile Chemists and Colorists (AATCC) in 2003 by the awarding of their Henry E. Millson Award for Invention. The operating name for the fibre inside the Enka Organization was "Newcell", and the development was carried through pilot plant scale before the work was stopped. The fibre was developed further as Tencel in the 1980s by Courtaulds Fibres in Coventry, UK and at the Grimsby, UK pilot plant. The process was first commercialised at Courtaulds rayon factories at Mobile, Alabama (1990) and at the Grimsby plant (1998). In 1998, Courtaulds was acquired by Akzo Nobel, who combined the Tencel division with other fibre divisions under the Accordis banner, prior to selling them off to private equity (CVC Partners). In 2000, CVC sold the Tencel division to Lenzing AG, who combined it with their "Lenzing Lyocell" business but maintained the brand name Tencel. As of 2017, Lenzing's Tencel brand is perhaps the most widely known lyocell fiber producer throughout the world.
Plied yarns constructed from different fiber types and methods of forming the plied yarns
Plied yarns and methods of constructing plied yarns from two different yarns, manufactured using different fibers wherein the plied yarns possess enhanced properties. The yarns developed and described herein are plied yarns, rather than, and in direct contrast to intimately blended yarns. Examples of the fibers and / or yarns utilized in forming the yarns of different fibers described herein, include but are not limited to 100% cotton, Modal, and Lyocell. The yarns described herein can be used for various end uses, including but not limited to formation of terry fabric for use in towels, robes, apparel, and the like.
Owner:TARGET BRANDS INC
A low-alkali mercerizing method for improving the dimensional stability of lyocell fabric
This application relates to a low-alkali wet mercerizing treatment method for improving the dimensional stability of Tencel fabrics, comprising the following steps: S1, cold piling desizing and refining treatment; S2, low-alkali wet mercerizing treatment; S3, washing and drying; S4, dyeing. The desizing rate, wicking effect, dimensional stability, strength, and various fastness properties of the Tencel fabrics obtained by this treatment method are effectively improved.
Owner:CHANGZHOU DONGHENG PRINTING & DYEING CO LTD
A lyocell ultrafine fiber preparation method based on supercritical carbon dioxide induced fibrillation
This invention belongs to the field of textile materials technology, and relates to a lyocell ultrafine fiber based on supercritical carbon dioxide-induced fibrillation and its preparation method. This invention combines supercritical carbon dioxide finishing with mechanical finishing, achieving efficient and controllable ultrafine lyocell fiber processing by controlling the temperature (50-70℃), pressure (28-32MPa), treatment time (90-120min), and depressurization rate (30-60s) of supercritical CO2. The entire lyocell fiber splits into countless ultrafine fibers, and the microcracks generated inside the fibers are fine and uniform, while maximizing the preservation of the fiber's inherent strength.
Owner:HAOTAI (JIANGSU) NEW MATERIAL TECHNOLOGY CO LTD
Environmentally friendly filters for biodegradable smoking articles
The present invention provides a filter for smoking articles and a smoking article containing the same. The filter for the smoking article contains lyocell tow containing lyocell fibers, and is characterized in that it has a biodegradation degree of 80% or more after 3 months (12 weeks) under industrial composting conditions of 58°C ± 2°C and 50% ± 2% humidity as defined in EN 13432, and the biodegradation degree is defined by the following formula. D = {(m1 - m2) / m1} * 100 (Here, D is the degree of biodegradation (%), m1 is the initial weight of the smoking article filter (g), and m2 is the weight of the upper residue on the standard sieve after the specified period (g).)
Owner:KT&G CO LTD +1
A method for preparing lyocell fiber by using corn stalk as raw material
The present application relates to a kind of preparation lyocell fiber with corn stalk as raw material method, comprising:1) organic solvent pretreatment: corn stalk particles are placed in the mixed solvent of ethanol and water and are handled to obtain pretreated particles;2) alkali oxygen synergistic treatment: pretreated particles are added to the mixed solution containing sodium hydroxide and hydrogen peroxide to obtain alkali oxygen treated material;3) high temperature hot water treatment to obtain corn stalk cellulose;4) washing and drying to obtain corn stalk cellulose pulp;5) pulp swelling to obtain swollen material;6) vacuum heating dissolution: reduced pressure distillation concentration, to obtain spinning dope;7) spinning coagulation and post-processing.The quality of corn stalk cellulose pulp obtained by the method is good, the prepared lyocell fiber has excellent mechanical properties, and has the advantages of high softness, good dyeing degree, high hygroscopicity, etc.;The process is green and environmentally friendly, and meets the requirements of clean production;Realize the high-value conversion of agricultural waste corn stalk, and have good economic and social benefits.
Owner:YIXIANG PERSONAL HOME CARE HEALTH RESEARCH (HENAN) CO LTD
Lyocell material, smoking article and method of manufacturing thereof
PendingCN122270602ATobacco smoke filtersMonocomponent cellulose artificial filamentPolymer scienceSlurry
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.
Owner:KOLON INDUSTRIES INC +1
Lyocell material, filter for smoking articles, smoking article and method of manufacturing thereof
PendingCN122270605ATobacco smoke filtersArtificial filaments from cellulose derivativesAcetic acidPolymer science
The present application relates to lyocell material, filters for smoking articles comprising the lyocell material and smoking articles. The lyocell material and filters for smoking articles of the present application can replace conventional cellulose acetate material and filters for smoking articles comprising the cellulose acetate material.
Owner:KOLON INDUSTRIES INC +1
Machine vision driven real-time detection method for defects in the carding of lyocell fibers
The application relates to a machine vision driven real-time detection method for a lyocell fiber carding defect, and relates to the technical field of machine vision detection, and comprises the following steps: acquiring a surface image sequence of a lyocell fiber sliver through a first industrial camera; determining a pixel gray abnormal threshold based on a real-time production condition parameter set, judging a suspected defect area, and immediately generating a trigger signal and a position code and sending the same to a second industrial camera; acquiring a second sliver surface image through single-frame image acquisition of the suspected defect area by the second industrial camera; inputting the second sliver surface image into a motion blur denoiser for image enhancement to obtain a second enhanced sliver surface image, and obtaining a carding defect detection result through a defect detection model. The application solves the problems that the traditional fiber sliver defect detection is difficult to consider the detection speed and precision, the process is greatly affected by the working condition and imaging quality, and the detection effect is poor and the stability is low.
Owner:JIANGSU CHINA TEXTILE UNITED KNITTING CO LTD
Lyocell material, filter for smoking articles, smoking article and method of manufacturing thereof
PendingCN122270604ATobacco smoke filtersArtificial filaments from cellulose derivativesPolymer scienceCellulose acetate
The present disclosure relates to lyocell material and filters for smoking articles and smoking articles comprising lyocell material. According to the present application, lyocell material and filters for smoking articles can replace conventional cellulose acetate material and filters for smoking articles comprising the same.
Owner:KOLON INDUSTRIES INC +1
Hydrophobized modified-cellulose-containing material and method for producing same
PCT designated stageWO2026110849A1Non-fibrous pulp additionNon-woven fabricsPolymer scienceNatural fiber
[Problem] To provide a method for hydrophobizing cellulose that can be used as a substitute for plastic, and hydrophobized modified cellulose. [Solution] The aforementioned problem is solved by a method in which a cellulose-containing material is immersed in or brought into contact with a lignin / PVA solution or a lignin / hemicellulose solution, a complex of the lignin and the PVA or the hemicellulose is adsorbed onto a hydrophilic surface of the cellulose-containing material, and the lignin is adsorbed onto a hydrophobic surface of the cellulose-containing material. Examples of the modified-cellulose-containing material include: natural cellulose, such as paper materials; and regenerated cellulose fibers, such as viscose rayon, cupra, and Tencel (Lyocell).
Owner:SHINSHU UNIVERSITY +1
Enhanced pvc-based floor covering with a foamed backing layer
PendingCN122257270ASynthetic resin layered productsCellulosic plastic layered productsCelluloseFiberglass mesh
A floor covering is provided that includes a top layer, a foam backing layer, and a composite reinforcement between the top layer and the foam backing layer, wherein the composite reinforcement includes cellulose veil, lyocell veil, or viscose veil chemically bonded to a fiberglass grid.
Owner:GERFUL FLOORING (CHINA) CO LTD
Lyocell material, filter for smoking articles, smoking articles, and method for manufacturing the same.
The present invention relates to a lyocell material, a filter for smoking articles containing the lyocell material, and a method for manufacturing the same. The lyocell material and the filter for smoking articles containing the same manufactured by the present invention replace conventional cellulose acetate materials and filters, and not only have excellent electrostatic properties, but also provide excellent filter manufacturing processability and excellent tobacco properties (e.g., uniform filtering performance).
Owner:KOLON INDUSTRIES INC +1
Preparation method of high-spinnable flame-retardant lyocell fiber with high precipitation resistance
PendingCN122147558AFlame-proof filament manufactureMonocomponent cellulose artificial filamentYarnPolymer science
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.
Owner:SHANDONG ZHONGFIBER TEXTILE TECHNOLOGY CO LTD
Tourmaline modified lyocell fiber with high efficiency negative ion releasing function and preparation and application thereof
The application relates to a tourmaline modified Lyocell fiber with a high-efficiency negative ion release function and preparation and application thereof. A tourmaline powder / NMMO dispersion liquid with uniform distribution and stability is prepared in a wet ball milling mode by taking NMMO aqueous solution as a dispersion medium for spinning the Lyocell fiber, and the whole process is simple and environment-friendly in combination with a conventional Lyocell process. The prepared tourmaline modified Lyocell fiber has the high-efficiency negative ion release function.
Owner:DONGHUA UNIV
Spin dope, lyocell material, filter for smoking articles, smoking article and method of manufacture thereof
The present application relates to lyocell material, filter for smoking articles comprising the lyocell material and smoking articles. The lyocell material and filter for smoking articles according to the present application can replace cellulose acetate material and filter for smoking articles comprising the same in the art.
Owner:KOLON INDUSTRIES INC +1
A method for identifying ramie fibers and mixed fibers thereof based on long-life room temperature phosphorescence
This invention relates to a method for identifying ramie fibers and their mixed fibers based on long-lifetime room-temperature phosphorescence. The method establishes luminescence characteristic information for a lyocell fiber control sample, a ramie fiber control sample treated with a 15% NaOH solution, and a mixed fiber control sample of the two. The method acquires the fiber sample to be tested and prepares it as a test sample. The photoluminescence emission spectrum of the test sample is acquired under 365 nm excitation conditions to obtain emission peak position information. After UV excitation stops, the long-lifetime room-temperature phosphorescence decay information of the test sample is acquired to obtain lifetime information. The emission peak position information and lifetime information are compared with the corresponding information of the control sample to identify whether the fiber sample to be tested is ramie fiber or a mixture of lyocell and ramie fibers. This invention utilizes the differences in photoluminescence and long-lifetime room-temperature phosphorescence caused by changes in the crystal structure of ramie fibers for identification, providing an auxiliary detection method based on luminescence characteristics for fiber composition identification.
Owner:KEYI COLLEGE OF ZHEJIANG SCI TECH UNIV
System for preparing Lyocell fiber spinning dope by modifying wood pulp
ActiveCN224280567UFully swollenAdjust the degree of polymerizationArtificial thread manufacturing machinesMonocomponent cellulose artificial filamentPulp and paper industryLyocell
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.
Owner:YIBIN GRACE GROUP CO LTD
A method for preparing an anti-fibrillation crosslinking agent emulsion and an anti-fibrillation lyocell fabric
This invention discloses an anti-fibrillation crosslinking agent emulsion and a method for preparing anti-fibrillation lyocell fabric. The emulsion consists of the following components by mass percentage: 30-40% anti-fibrillation crosslinking agent, 5-10% emulsifier, 1-3% anti-settling agent, and the remainder being water. The anti-fibrillation crosslinking agent is one or more multifunctional triazine compounds used in combination. The fabric fibers undergo saturated crosslinking via the triazine compound, and the lyocell fabric is primarily treated using a cold pad-batch process. The specific method is as follows: a working solution containing the anti-fibrillation crosslinking agent emulsion is prepared; the lyocell fabric is padded with the working solution, controlling the liquid carry-over rate, and then rolled and piled; the treated lyocell fabric is washed with hot water soap, then washed with cold water, and dried to obtain the final product. The above preparation method is applicable to lyocell fabrics and their blended fabrics, shortening the processing flow, reducing mechanical friction between the fabric and equipment, and lowering the tendency for fibrillation.
Owner:BEIJING CTA TEX CHEM
Lotus leaf extract functionalized lyocell fiber, and preparation method and application thereof
This invention discloses a functionalized lyocell fiber based on lotus leaf extract, its preparation method, and its application, belonging to the field of functional regenerated cellulose fiber technology. The method first prepares porous starch microcapsules from lotus leaf extract, then pre-treats cellulose pulp with enzymes, subsequently mixing it with N-methylmorpholine-N-oxide, sericin, and nano-zinc oxide to form a spinning solution. The solution is then spun using a dry-jet wet spinning method, coagulated, washed, and dried to obtain the target fiber, which can be further processed into an anti-inflammatory and repairing mask base fabric. This invention significantly improves the retention rate of active ingredients in lotus leaves through microcapsule encapsulation and low-temperature gentle spinning, achieving long-lasting sustained release. The resulting fiber possesses excellent mechanical properties, skin-friendliness, and anti-inflammatory and soothing effects, making it suitable for high-end mask base fabrics, medical dressings, and intimate textiles.
Owner:EAST CHINA UNIV OF SCI & TECH +1
High-strength low-deformation composite natural antibacterial spunlace cloth and preparation method and application thereof
This invention provides a high-strength, low-deformation composite natural antibacterial spunlace fabric, its preparation method, and its application, belonging to the field of hygiene product technology. It includes straw pulp fiber, wood pulp fiber, and regenerated cellulose fiber, wherein the wood pulp fiber is bleached softwood pulp fiber; the regenerated cellulose fiber is lyocell fiber and / or viscose fiber; the lengths and diameters of the straw pulp fiber, wood pulp fiber, and regenerated cellulose fiber are complementary and matched to construct a multi-level reinforcing fiber network structure. This invention improves existing spunlace fabrics in terms of both materials and structure. The straw pulp fiber, wood pulp fiber, and regenerated cellulose fiber form a ternary synergistic fiber system, with filling fiber units embedded in the network pores formed by the regenerated cellulose fiber and entangled reinforcing fiber units, forming a wedge-shaped filling that significantly improves the strength of the spunlace fabric.
Owner:YIXIANG PERSONAL HOME CARE HEALTH RESEARCH (HENAN) CO LTD
Antibacterial and bacteriostatic skin-friendly school uniform fabric and preparation method thereof
The application discloses a kind of based on antibacterial bacteriostatic skin-friendly school uniform fabric and preparation method thereof, specifically related to textile technical field, related to a kind of based on antibacterial bacteriostatic skin-friendly school uniform fabric and preparation method thereof;Based on antibacterial bacteriostatic skin-friendly school uniform fabric is prepared by using the antibacterial finishing liquor and quick-drying finishing liquor of antibacterial microcapsule containing rhizoma coptidis extract, dipotassium glycyrrhizinate and paeonol component by lyocell base cloth, polyester cotton knitted cloth, outer fabric, by middle layer fabric preparation, inner layer fabric preparation, three-layer point glue composite, final setting preparation is obtained;The application is wrapped in microcapsule by natural antibacterial active ingredient, and is covalently bonded with lyocell fiber base cloth by using reactive polyurethane crosslinking agent, so that the resistance of antibacterial function layer is improved, so as to improve its antibacterial bacteriostatic effect.
Owner:NINGBO EVERGREEN GARMENTS CO LTD
A knit shirt of lyocell and wool
The utility model relates to a kind of Tencel wool blended knitwear, and the main body of knitwear is constituted by rectangular blended fabric, and the left and right ends of the front side of blended fabric are respectively provided with oblique pocket, and the left and right sides of the front part of blended fabric are respectively shaped with short sleeve that is inclined to left front and right front, and the cuff of short sleeve is inserted in oblique pocket;The left and right sides of the back side of blended fabric are respectively shaped with left lapel edge and right lapel edge that extend rearward, and the side of left lapel edge close to the middle part of blended fabric is respectively fixedly connected with the sub button of a plurality of snap fasteners, and the side of right lapel edge close to the middle part of blended fabric is respectively fixedly connected with the female button of a plurality of snap fasteners opposite to sub button.The present knitwear has multifunctional structure, and can be used as knitwear in daily life, and can be changed into blanket after unfolding, so as to increase the use of knitwear.
Owner:SHAOXING JINDESHENG GARMENT CO LTD
Energy consumption prediction and rolling optimization control method and system for lyocell fiber drying process
ActiveCN122085722Asmall fluctuationImprove stabilityAdaptive controlControl engineeringProcess engineering
This invention relates to the field of fiber drying optimization control technology, and in particular to a method and system for predicting and rolling optimization control of energy consumption in the drying process of lyocell fibers. The method includes the following steps: collecting multi-source process data and downstream packaging terminal data of the drying process; obtaining cluster-level terminal records, cluster-level discharge time windows, and cluster-level operating condition feature vectors through time-delay alignment and package-level traceability mapping; and then obtaining the cluster-level unit oven-dry fiber energy consumption assessment value; constructing a prediction model for moisture regain and unit energy consumption, using a future control quantity sequence and the current cluster-level operating condition feature vector sequence as inputs to predict the future cluster-level equivalent moisture regain and the cluster-level unit oven-dry fiber energy consumption assessment value; using the future control quantity sequence as control instructions, obtaining real results to evaluate model performance and update model parameters. This invention can balance energy consumption and terminal moisture regain control under conditions of terminal moisture regain feedback lag, and can effectively suppress the high incidence of over-wet re-drying and the irreversible quality risk of over-drying.
Owner:DONGHUA UNIV
Lyocell material, filter for a smoking article, smoking article, and method of manufacturing the same
The present application relates to lyocell material, filter for smoking articles comprising the lyocell material and smoking articles comprising the filter. The lyocell material and filter for smoking articles according to the present application can replace conventional cellulose acetate material and filter for smoking articles comprising the same.
Owner:KOLON INDUSTRIES INC +1
Lyocell material, filter for a smoking article, smoking article and method of manufacturing thereof
The present application relates to lyocell material, filter for smoking articles comprising the lyocell material and smoking articles. The lyocell material and filter for smoking articles according to the present application can replace conventional cellulose acetate material and filter for smoking articles comprising the same.
Owner:KOLON INDUSTRIES INC +1
Lyocell yarn surface antigen fibrillation treatment method
This invention belongs to the field of textile technology, specifically relating to a method for surface antigen fiberization treatment of lyocell yarn. An anionic antigen fiberization auxiliary agent, soda ash, and water are prepared into a working solution. After unwinding, the yarn passes through the reaction tank of a single-yarn continuous antigen fiberization treatment device, where the yarn surface reacts with the working solution. After being extruded by an extrusion device and air-dried by rotation in a drum, it is wound into loose cones by a digital winding device. The treated loose cones are then fixed in color using a steamer. The fixed cones are then neutralized, washed, and dried using a cone dyeing machine. By strictly controlling the time the yarn passes through the reaction tank to within 0.1 seconds, instantaneous surface adsorption of the working solution is achieved. This ensures that the auxiliary agent reacts only on the outer layer of the yarn, forming a robust protective shell, while the core fibers remain in an unreacted, natural state, thus fully preserving the flexibility of the lyocell fiber core.
Owner:LUTAI TEXTILE
An ultra-thin corduroy fabric and its preparation process
This invention provides an ultra-thin corduroy fabric and its preparation process. First, a lyocell / polyimide blended yarn is prepared as the warp, and lyocell yarn or a lyocell / cotton blended yarn is used as the ground weft. The ground weft and warp interweave to form a base layer with a fixed pile. Lyocell yarn or a lyocell / cotton blended yarn is used as the pile weft, interweaving with the warp to form a floating weft. Low-temperature soluble vinylon is woven between the base layer and the pile weft to obtain the grey fabric. The vinylon is then removed by washing. Finally, the fabric undergoes cutting and post-processing to obtain the ultra-thin corduroy fabric. This invention uses lyocell yarn as the main material, improving the strength and lightness of the corduroy; uses lyocell / polyimide blended yarn as the warp to resist the damage to strength during the cutting and brushing processes; and introduces low-temperature soluble vinylon to compensate for the problem of high-count lyocell yarn's smooth surface making it prone to slippage and difficult to cut. The final result is an ultra-thin corduroy fabric with significant market application value.
Owner:XINXIANG CITY (CHINA ACAD OF TEXTILE SCI) ZHONGYUAN BRANCH
Preparation method of regenerated protein lyocell fiber based on ionic liquid dissolution and recovery of wool and silk
ActiveCN121826936BArtificial filament recoveryConjugated cellulose/protein artificial filamentsPolymer scienceSpinning
The application discloses a preparation method of a regenerated protein lyocell fiber based on ionic liquid dissolution and recovery of plush and silk fibroin, and comprises the following operation steps: S1, after waste plush or silk fibers are crushed, washed and bleached, the fibers are dissolved in a dissolving kettle by using a double-component composite ionic liquid solvent to obtain a protein ionic solution; S2, after the protein ionic solution is filtered, pre-crushed wood pulp and a thermoplastic polyurethane elastomer (TPU) are added and blended and stirred to form a uniform spinning dope; S3, the spinning dope is extruded through a circular spinneret and enters a coagulating bath to obtain a regenerated protein fiber; and S4, the regenerated protein fiber is subjected to secondary water washing, drafting, oiling, drying and cutting to obtain a regenerated protein lyocell fiber. The application prepares a double-component composite solvent by preparing a composite of N-methylmorpholine N-oxide bromide and 1-ethyl-3-methyl imidazole bromide salt, and applies the double-component composite solvent to dissolution of waste plush or silk fibers and preparation of a high-protein-content regenerated protein lyocell fiber.
Owner:NINGBO BOYANG HOME TEXTILE GRP CO LTD
Method for constructing fluid-structure thermal coupling dynamics model of thin film evaporator and related device
ActiveCN122113314Aquick calculationimprove fidelityGeometric CADDesign optimisation/simulationDynamic modelsNon linear methods
The embodiment of the application relates to the technical field of lyocell fiber equipment, and provides a thin film evaporator fluid-thermal coupling dynamics model construction method and related devices, the method comprises the following steps: a scraper force model under multiple working conditions is established; a nonlinear normal contact force model of a thrust self-aligning roller bearing is established; a flexible body model of a main shaft and a scraper plate is established; a flexible body model of a cylinder is established; the scraper force model, the nonlinear normal contact force model, the flexible body model of the main shaft and the scraper plate and the flexible body model of the cylinder are integrated into a multi-body dynamics simulation platform to construct a thin film evaporator fluid-thermal coupling dynamics model of a complete machine, and the method can ensure key deformation precision while greatly reducing calculation load in the process of large-scale thin film evaporator dynamics modeling.
Owner:DONGHUA UNIV
Use of a polymer in the production of cellulosic fibres
PendingCN122147556AMonocomponent cellulose artificial filamentSpinning solutions preparationPolymer scienceSpinning
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.
Owner:SHANGHAI NOVIKA CHEMICAL CO LTD