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WO2025087981A1 - Fibres de cellulose profilées à force de traction améliorée et procédés de fabrication correspondants - Google Patents

Fibres de cellulose profilées à force de traction améliorée et procédés de fabrication correspondants Download PDF

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Publication number
WO2025087981A1
WO2025087981A1 PCT/EP2024/079971 EP2024079971W WO2025087981A1 WO 2025087981 A1 WO2025087981 A1 WO 2025087981A1 EP 2024079971 W EP2024079971 W EP 2024079971W WO 2025087981 A1 WO2025087981 A1 WO 2025087981A1
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WO
WIPO (PCT)
Prior art keywords
cellulose
range
profiled
fibers
tex
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PCT/EP2024/079971
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German (de)
English (en)
Inventor
Dominik Mayer
Josef SCHACHTNER
Antje Ota
Frank Hermanutz
Ronald BEYER
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Kelheim Fibres GmbH
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Kelheim Fibres GmbH
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Filing date
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Publication of WO2025087981A1 publication Critical patent/WO2025087981A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/02—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from solutions of cellulose in acids, bases or salts

Definitions

  • the present invention relates to profiled cellulose fibers having an aspect ratio of the largest to the smallest cross-sectional thickness of the cellulose fiber of at least 1.25, a fineness of at most 50 dtex, and a maximum tensile strength of at least 22 cN/tex.
  • the present invention further relates to processes for producing such profiled cellulose fibers, devices adapted for producing such cellulose fibers, and uses of the cellulose fibers according to the invention for producing yarns, woven fabrics, or nonwovens, or as reinforcing material in building materials.
  • multi-link viscose filaments Compared to conventional viscose filaments with a circular cross-section, multi-link viscose filaments have a larger volume because the circumferential area of the multi-link filaments or fibers is larger than their actual cross-sectional area. Such viscose fibers are therefore preferred in textile applications where bulkiness is desired, such as pile fabrics.
  • a filament yarn consisting of X- or Y-shaped continuous viscose filaments is described, for example, in Japanese patent application JPS-61-113812.
  • profiled viscose filaments are their increased absorbency compared to filaments with a round cross-section.
  • Profiled filaments processed as staple fibers can therefore be used to produce absorbent products such as tampons, wipes, and swabs.
  • UK Patent 1 333 047 describes an absorbent viscose fiber in which the filaments have a collapsed hollow structure and a multi-segmented cross-section.
  • these filaments have a relatively high absorbency compared to conventional viscose filaments, they have the disadvantage of being complicated are difficult to produce, as the filaments must be formed with an inflated, hollow structure and then collapsed.
  • the process specified in UK-1 333 047 also has the disadvantage that fiber collapse is difficult to control to achieve a uniform filament cross-section, so that the resulting filaments usually have irregular, multi-segmented cross-sectional shapes.
  • US 5,458,835 describes a process for producing viscose filaments in staple fiber form, which have a fineness of at least 5.0 dtex and a multi-segment cross-section, for example, with a Y, X, H, or T-shaped configuration.
  • viscose is extruded to produce the fibers and introduced into a bath of aqueous sulfuric acid, zinc sulfate, and sodium sulfate.
  • the fibers are then drawn at a ratio of 50%, made into a staple fiber yarn, and washed and dried.
  • the fibers thus produced have a filament tenacity of approximately 15 to 19 cN/tex.
  • the present invention addresses this need.
  • such profiled cellulose fibers can be produced by a process in which the Cellulose is dissolved in an ionic liquid (as a direct solvent) for spinning, and the strands generated by extrusion are precipitated into cellulose filaments in an aqueous coagulation medium.
  • the profile structure initially created by the extrusion dies undergoes some changes due to the intense stretching, but remains intact to such an extent that a desired profile structure can be specifically realized by adjusting the die geometry.
  • the present invention accordingly relates to a profiled cellulose fiber having an aspect ratio of the largest to the smallest cross-sectional thickness of the cellulose fiber of at least 1.25, a fineness of at most 50 dtex and a maximum tensile strength (dry) of at least 22 cN/tex.
  • the aspect ratio is determined as the average of the aspect ratio from the cross-section of 10 randomly selected fibers.
  • the specified aspect ratio is a measure of the deviation of the profile shape of the specified cellulose fibers from a round profile shape, for which the aspect ratio is "1.0".
  • the larger the aspect ratio the greater the deviation of the profile shape from a round profile shape.
  • an aspect ratio that deviates more from a round profile shape is preferred, whereby it has proven advantageous if the cellulose fiber has an aspect ratio in the range of 1.3 to 5, in particular in the range of 1.5 to 4.0, and more preferably in the range of 1.7 to 4.0.
  • regenerator cellulose fiber refers to a cellulose fiber that is not of natural origin and that can have a thickness and length not achieved in natural fibers.
  • cellulose fiber and regenerated cellulose fiber have a synonymous meaning when they refer to products and fibers to be produced according to the invention, since the profiled cellulose fibers according to the invention are regenerated cellulose fibers.
  • the fineness is a measure of the thickness of the fibers and is limited to a maximum of 50 dtex.
  • the ranges that can be conveniently achieved and adjusted for the maximum tensile strength (dry) are from 25 to 50 cN/tex, in particular in the range from 25 to 32 cN/tex, and more preferably in the range from 25 to 30 cN/tex.
  • the cellulose fibers according to the invention have a maximum tensile strength (wet) in the range of 10-30 cN/tex and in particular 15-25 cN/tex.
  • “Dry” here refers to the fact that the maximum tensile strength is determined for dry fibers (with respect to water).
  • Wet on the other hand, means that the fibers were wet during the determination, in the sense of water present on the fiber surface. Such tensile properties ensure sufficient load-bearing capacity, which is important for the use of the fibers for reinforcement purposes.
  • the elongation of the cellulose fibers according to the invention is in the range of 3 to 18%, preferably 5 to 10%, more preferably 5 to 8%.
  • the elongation and maximum tensile force are determined in the context of the invention described here using DIN EN ISO 5079: 2020.
  • modulus which for an elongation in the range of 0.2 to 0.4% is preferably in the range of 500 to 2500 cN/tex, in particular 800 to 2000 cN/tex, and more preferably 600 to 1600 cN/tex.
  • the modulus is measured according to BISFA at 5% elongation.
  • the cellulose fibers according to the invention are not subject to any relevant restrictions, provided that they do not exceed the stated fineness of 50 dtex.
  • the fiber diameter has a certain correlation with the fineness of the cellulose fibers, although the profile shape of the cross section results in deviations from round fibers.
  • the "largest fiber diameter" is also specified for the cellulose fibers according to the invention. This diameter is obtained by placing a circle that completely encloses the fiber cross-section around it and determining its diameter. For this largest fiber diameter, it is preferred if the cellulose fibers according to the invention is set in a range from 11 to 150 pm, and in particular 12 to 70 pm.
  • the cellulose fibers according to the invention are characterized in that they can be produced in virtually unlimited lengths (i.e., as continuous fibers or "filaments"). Accordingly, in a preferred embodiment, the cellulose fibers according to the invention are formed as continuous fibers. In a preferred embodiment, the filament is wound up, e.g., on a spool.
  • the fibers can, on the other hand, be cut to any desired length or be formed as staple fibers. For such staple fibers, it is particularly preferred if they have a length of 3 to 150 mm, in particular of 15 to 120 mm, and even more preferably 30 to 80 mm.
  • the specified profiled cellulose fibers are distinguished from cellulose fibers with a round cross-section (with the same dtex fineness) by their favorable water retention capacity, determined according to DIN 53184. For this purpose, it is particularly preferred if it is in the range of 45 to 120% and preferably 60 to 90%.
  • the significance of this advantageous water retention capacity lies in its close relationship with the amorphous components and the void system between the crystalline regions. This pore system has a decisive influence on the sorption properties of the fibers and plays an important role, for example, in dyeing processes.
  • the profile with which the cellulose fiber according to the invention is formed this is also not subject to any relevant restrictions, provided that the profile ensures an aspect ratio of at least 1.25.
  • the cellulose fiber according to the invention can be ribbon-shaped, wherein "arms" of the profile extending from the center of the cross-section can be arranged in a plane or at an angle to one another, preferably in the range of 90° to 170°.
  • the cellulose fiber can also be C-shaped.
  • the cellulose fiber can be formed with a trilobal structure, wherein the angles between the "arms" of the profile extending from the center of the cross-section can be the same or different, resulting, for example, in a Y-shape.
  • the cellulose fiber can be formed with a tetralobal structure (i.e., with four "arms" of the profile extending from the center of the cross-section).
  • the angles between the arms of the profile can be the same (as a "+” shape) or different (e.g. as an X-shape).
  • even more global profile shapes are possible.
  • the profile shape may be H-shaped or H-like, with “arms” of the profile extending from a linear part of the profile and extending from the linear profile part at an angle of preferably in the range of 50° to 140°.
  • the cellulose fibers may have profile shapes as described in EP 2732080 B1 (insofar as these are not already covered by the shapes specified above).
  • the present invention relates to a process for producing profiled cellulose fibers as specified above.
  • This process comprises at least the following steps: (i) preparing a dope of cellulose and an ionic liquid; (ii) spinning the dope through a profiled die at a temperature at which the crossover is in a range of 5 to 55 rad/s; (iii) introducing extruded fibers into a coagulation bath; and (iv) drawing the produced fibers to a maximum draw of at least 100%.
  • maximum stretch refers to the percentage by which a given section is longer after stretching than before.
  • a stretch of at least 100% means that the fiber has been stretched to twice its original length (by 100%).
  • the "crossover” refers to the point at which the elastic modulus is equal to the viscous modulus during a frequency sweep.
  • the crossover of the spinning solution is specified here as the angular frequency with the unit rad/s and is determined using a rotational rheometer.
  • the crossover is temperature-dependent; the person skilled in the art can determine the temperature at which the crossover of the spinning solution lies in the range of 5 to 55 rad/s by a series of measurements in which the temperature is systematically varied.
  • the temperature in step (ii) is preferably adjusted so that the crossover lies in the range of 8 to 50 rad/s, in particular in the range of 10 to 40 rad/s, and more preferably 13 to 35 rad/s.
  • there is the zero shear viscosity of the spinning solution which can be conveniently adjusted to a range of 1500 to 9000 Pa.s and preferably in the range of 2000 to 8000 Pa.s.
  • suitable spinning temperatures for most spinning solutions are above 25°C.
  • Particularly favorable spinning temperatures are, for example, in the range of 50 to 85°C and, in particular, 55 to 75°C.
  • the spinning dope After passing through the profiled nozzle, is passed through an air gap into a coagulation bath.
  • phase inversion can be significantly delayed and homogeneous regeneration of the cellulose can be achieved.
  • these conditions prevent the formation of a fibrillar fiber structure and thus reduce the tendency of fibers spun with an air gap to fibrillate.
  • the length of the air gap is preferably adjusted to ensure that the extruded fibers are in contact with air for an optimal period of time before being introduced into the coagulation bath.
  • the present invention is not subject to any significant limitations. It is preferably present as fibrous cellulose, in particular wood pulp, linters, paper, and/or in the form of other natural cellulose fibers.
  • natural cellulose fibers hemp, flax, coconut, jute, bamboo, and/or sisal fibers can be cited as advantageous.
  • the cellulose is partially derivatized, with esters or ethers being preferred derivatives.
  • esters or ethers being preferred derivatives.
  • the esters can be, for example, phosphoric acid and/or nitrogen-containing esters, such as cellulose carbamate or allophonate, cellulose carboxylates, such as cellulose acetate, cellulose propionate, and cellulose butyrate, and the ethers can be carboxymethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose, or, for example, cellulose 2,5-acetate. Accordingly, cellulose derivatives are also suitable according to the invention.
  • Mw molecular weight of 100,000 to 500,000 g/mol, and preferably 200,000 to 400,000 g/mol, determined in each case by GPC (gel permeation chromatography) using suitable standards.
  • GPC gel permeation chromatography
  • additives can be used at various points in the process according to the invention.
  • they can The additives can be added to the coagulation medium, the spinning solution containing the cellulose, and/or in a subsequent step, for example, in a modification medium.
  • These additives can be, for example, microcapsules, pore formers, plasticizers, matting agents, marking agents, flame retardants, bactericides, crosslinking agents, hydrophobic agents, antistatic agents, and/or colorants.
  • the ionic liquid which is one of the essential components in the process according to the invention as a direct solvent, is not subject to any significant restrictions, provided that in combination with the cellulose, a homogeneous solution with suitable processing properties can be formed. It is particularly advantageous if the ionic liquid is a compound that can be characterized by the general formula [Q + ] n [Z] n ", where [Q + ] denotes the cation of the ionic liquid, and as a quaternized ammonium [R 1 R 2 R 3 R 4 N + ], phosphonium [R 1 R 2 R 3 R 4 P+] or sulfonium [R 1 R 2 R 3 S + ] cation or an analogous quaternized nitrogen, phosphorus or sulfur heteroaromatic of the following formulas (I), (II), (III), (IV), (V) and (VI) In these compounds, the radicals R 1 , R 2 , R 3 , R 4 and the radicals R 1 to R 8 in the formulas
  • the above-described alkyl radical is in the form of a C 1 -C 18 alkyl radical, in particular an alkyl radical having 1 to 4 carbon atoms, preferably a methyl, ethyl, 1-propyl, 2-propyl, 1-butyl or 2-butyl radical
  • the cyclic alkyl radical is in the form of a C 3 -C 10 cycloalkyl radical, in particular in the form of a cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl radical
  • the unsaturated alkyl radical is in the form of a vinyl, 2-propenyl, 3-butenyl, cis-2-butenyl, trans-2-butenyl radical
  • the aromatic radical is in the form of a phenyl or naphthyl radical which is substituted with 1 to 3 halogen atoms, alkyl radicals having 1 to 4 carbon atoms or phenyl radicals
  • imidazolium carboxylates in the form of [EMIM] [acetate], [EMIM] [propionate], [EMIM] [butyrate], [EMIM] [pentanoate], [EMIM] [hexanoate], [EMIM] [heptanoate], [EMIM] [octanoate], [EMIM] [nonanoate], [EMIM] [decanate] and/or imidazolium phosphates [MMIM] [DMP], [MMIM] [DEP], [EMIM] [DEP].
  • EMIM denotes 1-ethyl-3-methylimidazolium, [MMIM] 1,3-dimethylimidazolium, [DEP] diethyl phosphate, and [DMP] dimethyl phosphate.
  • EMIM denotes 1-ethyl-3-methylimidazolium, "MMIM” 1,3-dimethylimidazolium, "DMP” dimethyl phosphate, and "DEP” diethyl phosphate.
  • a particularly preferred ionic liquid in the context of the present invention is [EMIM] [octanoate].
  • the concentration of cellulose in the ionic liquid is within the usual range for the production of spinning solutions from ionic liquids and cellulose, i.e. in the molecular weight range of the cellulose-based polymers specified above, cellulose solutions can be processed in the concentration range between about 4 and 16, in particular between about 6 and 14 wt.% cellulose in the direct solvent, in particular in the ionic liquids.
  • the profile structure is partially impaired by the high degree of stretching, i.e., the profile structure is less pronounced after stretching than when the spinning dope exits the nozzle.
  • spinning in step (ii) preferably takes place through a die with a slot-shaped, trilobal, tetralobal, or especially cross-shaped outlet opening.
  • the "die” refers to the component of the extruder through which the spinning mass leaves the extruder, while “outlet opening” refers to the opening itself.
  • the die in the process according to the invention has a plurality of outlet openings, for example 50 or more, preferably 100 or more, and even more preferably 150 to 500 outlet openings.
  • the spinning dope is introduced into a coagulation medium, where the ionic liquid can pass into the liquid phase of the coagulation medium; this coagulates the cellulose into filaments and fibers.
  • the coagulation medium is generally not subject to any particular restrictions, although for cost reasons it is preferred to use at least a portion of water as the coagulation medium; water acts as a non-solvent for the cellulose fibers produced. In addition to water, a quantity of another solvent can be present in the coagulation medium to optimize the coagulation rate.
  • the temperature can be adjusted for an optimal processing result, which can be determined by a professional depending on the substances contained in the coagulation medium.
  • the coagulation medium be formed from a protic solvent or a mixture of protic solvents, such as, in particular, water and/or alcohols.
  • protic solvents such as, in particular, water and/or alcohols.
  • alcohols methanol, ethanol, and/or isopropanol are particularly preferred.
  • the coagulation medium it is possible for the coagulation medium to further contain one or more carbohydrates; for details on a favorable process procedure for this purpose, reference can be made to DE 10 2013 002 833 B4, and for carbohydrates to be used appropriately, reference can be made to [0028] of this patent.
  • the spinning solution is discharged from the extruder and transferred into the coagulation medium at a speed that ensures a good compromise between processing speed and contact time of the spinning solution with the air in the air gap.
  • this speed is preferably set to a range of 2 to 3 m/min, and in particular 2.2 to 2.5 m/min.
  • the stretching is not restricted to a relevant extent in that it can be carried out directly in the coagulation medium by making the filaments drawn off than introduced.
  • the temperature in the coagulation medium for optimum drawing depends on various conditions which can be determined by a professional depending on the composition of the coagulation medium.
  • the drawing takes place in a bath containing a coagulation medium which is arranged downstream of a first bath containing a coagulation medium, so that the drawing only takes place at a stage at which part of the ionic liquid has already been dissolved out of the spun mixture.
  • the drawing itself can be achieved, for example, by introducing the fiber into a drawing area at a slower speed, e.g. via the roller, and drawing it out of this area more quickly.
  • the present invention relates to cellulose fibers that were produced or can be produced by the process described above.
  • Such cellulose fibers, or cellulose fibers as specified above can be used for a variety of purposes, for example in textile materials such as threads, yarns, twisted yarns, and the like, as well as textile fabrics, in particular wovens, knitted fabrics, scrims, nonwovens, and batting.
  • These textiles, and in particular the fibers or yarns can be advantageously used as reinforcing materials in fiber-based composites.
  • a further aspect of the present invention relates to a device for producing profiled cellulose fibers, in particular profiled cellulose fibers as specified above, wherein the device comprises a device part for passing a spinning solution through a heatable nozzle head with at least one profiled outlet opening, a coagulation bath arranged downstream of this device part, an air gap arranged between the coagulation bath and the outlet opening and a conveyor device for drawing the cellulose fibers generated via the profiled outlet opening, wherein the profiled outlet opening Aspect ratio of the largest to the smallest cross-sectional thickness of the exit opening in the range of 1.5 to 15.
  • Yet another aspect of the present invention relates to the use of cellulose fibers as specified above for producing a yarn, woven fabric, or nonwoven fabric, wherein a woven fabric is produced by knitting, weaving, warp knitting, embroidery, or braiding, and the nonwoven fabric is preferably formed as a carded nonwoven fabric, in particular as a needle-punched or spunlaced nonwoven, a thermobonded nonwoven, or as a nonwoven stitchbonded fabric.
  • the cellulose fibers can be processed using a paper, wetlaid, or airlaid process, or by combined processes such as combined carded-wetlaid or carded-airlaid technologies.
  • thermoplastic polymers for this purpose may include, in particular, saturated polyester-based resins such as polylactic acid resins; olefin resins such as polyethylene-based resins and polypropylene-based resins; cellulose-based resins such as triacetylated cellulose and diacetylated cellulose; nylon resins, vinyl chloride resins, styrene resins, (meth)acrylic resins, vinyl ether resins, polyvinyl alcohol resins, polyamide-based resins, polycarbonate-based resins, polysulfonate-based resins, and the like.
  • saturated polyester-based resins such as polylactic acid resins
  • olefin resins such as polyethylene-based resins and polypropylene-based resins
  • cellulose-based resins such as triacetylated cellulose and diacetylated cellulose
  • nylon resins vinyl chloride resins, styrene resins, (meth)acrylic resins, vinyl ether resins, poly
  • thermoplastic resins may be used alone or may be used as mixed resins of two or more types.
  • Curable polymers that can be used include photocurable resins or thermosetting resins, such as epoxy resins, phenolic resins, urea resins, melamine resins, unsaturated polyester resins, diallyl phthalate resins, polyurethane resins, silicon-containing resins, polyimide resins, elastomeric resins, and the like.
  • Thermosetting resins can also be used as a single resin or as a combination of two or more types of the aforementioned resins.
  • Yet another aspect of the present invention relates to the use of cellulose fibers as described above as reinforcing material in building materials.
  • the following examples serve to further explain the invention:
  • Pulp with a weight-average molecular weight of approximately 600,000 g/mol was irradiated with electron beams at a radiation dose of 80 kGy to obtain cellulose with a weight-average molecular weight of approximately 300,000 g/mol.
  • the Mw/Mn ratio of the resulting cellulose was 8.8.
  • a spinning solution or mass with a cellulose concentration of 12 wt.% was prepared by mixing it with l-ethyl-2-methyl-imidazolium octanoate using a thin-film evaporator from VTA at 110°C.
  • Frequency sweep measurements were first performed on this spinning dope at different temperatures using a plate-on-plate rheometer (Anton Paar MCR 301 Rheometer) to determine the optimal spinning temperature.
  • the frequency range was from 100 to 1 rads at a constant strain of 3%; the temperature was varied in 10°C increments from 110°C to 20°C.
  • the 10 measurements obtained were mathematically combined into a master curve. For each temperature, the zero-shear viscosity and crossover were determined using the Carreau-Yasuda model (see Table 1).
  • a crossover in the range of 10–50 rad s represents ideal spinning conditions for the production of profiled cellulose fibers.
  • the corresponding zero-shear viscosities were between 1000 and 5000 Pa-s.
  • the resulting spinning solutions were processed in an extruder through various cross-profile nozzles. These nozzles had different leg lengths and widths (see Table 2 below). The air gap to the coagulation medium was set at 10 mm. The resulting fibers were then drawn at 65°C. The various processing parameters are shown in Table 2 below:
  • the maximum drawability could be influenced by varying the spinning temperature. By modulating the spinning temperature of fibers produced using nozzle 2, maximum draws in the range of 350% (at 55°C), 700% (at 65°C), and 1250% (at 70°C) could be achieved.
  • Table 6 shows that the water retention capacity of all manufactured fibers is within a comparable range, regardless of fiber cross-section, fiber surface area, or fiber diameter.
  • the water retention capacity of lyocell fibers is approximately 60-70%, and that of hydrophilic cotton fibers is approximately 40-60%.
  • the overview in Table 6 thus shows that, depending on the drawing and nozzle geometry, a water retention capacity comparable to that of such fibers can be achieved.
  • the elastic modulus of commercial lyocell fibers is only approximately 700 cN/tex; through special spinning, elastic moduli of up to 1800 cN/tex can be achieved.
  • Cotton fibers have an elastic modulus in the range of 300-600 cN/tex.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)

Abstract

La présente invention concerne des fibres de cellulose profilées présentant un rapport d'aspect de la plus grande à la plus petite épaisseur de section des fibres de cellulose d'au moins 1,25, une finesse d'au plus 50 dtex et une force de traction maximale d'au moins 22 cN/tex. De telles fibres peuvent être utilisées de manière avantageuse pour des applications requérant une résistance mécanique élevée et une capacité de rétention d'eau élevée. La présente invention concerne en outre des procédés de fabrication de telles fibres de cellulose profilées, des dispositifs qui sont adaptés à la fabrication de telles fibres de cellulose et des utilisations des fibres de cellulose selon l'invention pour la fabrication de fils, de tissus ou de non-tissés ou en tant que matériau de renforcement dans des matériaux de construction.
PCT/EP2024/079971 2023-10-26 2024-10-23 Fibres de cellulose profilées à force de traction améliorée et procédés de fabrication correspondants Pending WO2025087981A1 (fr)

Applications Claiming Priority (2)

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DE102023129562.4A DE102023129562A1 (de) 2023-10-26 2023-10-26 Profilierte Zellulosefaser mit verbesserter Zugkraft und Verfahren zu ihrer Herstellung
DE102023129562.4 2023-10-26

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1333047A (en) 1969-11-27 1973-10-10 Courtaulds Ltd Process for making filaments
JPS61113812A (ja) 1985-09-25 1986-05-31 Asahi Chem Ind Co Ltd 嵩高性ビスコ−スレ−ヨンフイラメント
EP0301874B1 (fr) * 1987-07-30 1992-06-17 Courtaulds Plc Fibre cellulosique
US20110200783A1 (en) * 2004-12-10 2011-08-18 Lenzing Aktiengesellschaft Cellulosic staple fiber and its use
EP2732080B1 (fr) 2011-07-15 2015-06-17 Kelheim Fibres GmbH Fibre cellulosique régénérée
EP2785899B1 (fr) 2011-11-29 2017-01-04 Kelheim Fibres GmbH Fibre de cellulose régénérée
DE102013002833B4 (de) 2013-02-19 2017-03-23 Deutsche Institute Für Textil- Und Faserforschung Denkendorf Verfahren zur Herstellung von Celluloseregeneratfasern und Verwendung der nach dem Verfahren hergestellten Celluloseregeneratfasern
US20170121857A1 (en) * 2014-03-31 2017-05-04 Kolon Industries, Inc. Lyocell fiber
US20170156394A1 (en) * 2014-06-30 2017-06-08 Kolon Industries, Inc. Modified cross-section lyocell material for tobacco filter, and preparation method therefor
EP2732980B1 (fr) 2012-11-14 2018-04-18 Thomas Kostulski Jeu de carreaux
US20190024263A1 (en) * 2015-12-30 2019-01-24 Kolon Industries, Inc. Lyocell fiber and manufacturing method therefor
US20190048490A1 (en) * 2016-02-11 2019-02-14 Deutsche Instutute fur Textil-und Faserforschung Process for the preparation of polymer fibers from polymers dissolved in ionic liquids by means of an air gap spinning process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3732980A1 (fr) 2019-04-30 2020-11-04 Viscofan, S.A. Film comestible et procédé de fabrication

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1333047A (en) 1969-11-27 1973-10-10 Courtaulds Ltd Process for making filaments
JPS61113812A (ja) 1985-09-25 1986-05-31 Asahi Chem Ind Co Ltd 嵩高性ビスコ−スレ−ヨンフイラメント
EP0301874B1 (fr) * 1987-07-30 1992-06-17 Courtaulds Plc Fibre cellulosique
US5458835A (en) 1987-07-30 1995-10-17 Courtaulds Plc Process of making viscose staple fibers
US20110200783A1 (en) * 2004-12-10 2011-08-18 Lenzing Aktiengesellschaft Cellulosic staple fiber and its use
EP2732080B1 (fr) 2011-07-15 2015-06-17 Kelheim Fibres GmbH Fibre cellulosique régénérée
EP2785899B1 (fr) 2011-11-29 2017-01-04 Kelheim Fibres GmbH Fibre de cellulose régénérée
EP2732980B1 (fr) 2012-11-14 2018-04-18 Thomas Kostulski Jeu de carreaux
DE102013002833B4 (de) 2013-02-19 2017-03-23 Deutsche Institute Für Textil- Und Faserforschung Denkendorf Verfahren zur Herstellung von Celluloseregeneratfasern und Verwendung der nach dem Verfahren hergestellten Celluloseregeneratfasern
US20170121857A1 (en) * 2014-03-31 2017-05-04 Kolon Industries, Inc. Lyocell fiber
US20170156394A1 (en) * 2014-06-30 2017-06-08 Kolon Industries, Inc. Modified cross-section lyocell material for tobacco filter, and preparation method therefor
US20190024263A1 (en) * 2015-12-30 2019-01-24 Kolon Industries, Inc. Lyocell fiber and manufacturing method therefor
US20190048490A1 (en) * 2016-02-11 2019-02-14 Deutsche Instutute fur Textil-und Faserforschung Process for the preparation of polymer fibers from polymers dissolved in ionic liquids by means of an air gap spinning process

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