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WO2024251769A1 - Procédé et système de production de fibres libériennes pouvant être filées ou d'un fil libérien - Google Patents

Procédé et système de production de fibres libériennes pouvant être filées ou d'un fil libérien Download PDF

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Publication number
WO2024251769A1
WO2024251769A1 PCT/EP2024/065394 EP2024065394W WO2024251769A1 WO 2024251769 A1 WO2024251769 A1 WO 2024251769A1 EP 2024065394 W EP2024065394 W EP 2024065394W WO 2024251769 A1 WO2024251769 A1 WO 2024251769A1
Authority
WO
WIPO (PCT)
Prior art keywords
bast
fibers
fiber bundles
washing system
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/065394
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German (de)
English (en)
Inventor
Christian Meyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz Kuesters GmbH
Original Assignee
Andritz Kuesters GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Andritz Kuesters GmbH filed Critical Andritz Kuesters GmbH
Publication of WO2024251769A1 publication Critical patent/WO2024251769A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01B—MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING
    • D01B1/00—Mechanical separation of fibres from plant material, e.g. seeds, leaves, stalks
    • D01B1/10—Separating vegetable fibres from stalks or leaves
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
    • D01C1/00—Treatment of vegetable material
    • D01C1/02—Treatment of vegetable material by chemical methods to obtain bast fibres

Definitions

  • the present invention relates to a method for producing spinnable bast fibers, a method for producing a bast thread and a plant for producing spinnable bast fibers or a bast thread, wherein bast fibers are provided as bast fiber bundles.
  • bast fibers are becoming increasingly popular for the production of fiber webs and spinnable bast fibers.
  • the bast fibers are typically obtained from flax, linen, hemp or nettles. These plants are very sustainable as a source of raw materials because they have few demands on their habitat.
  • bast fibers After the bast fibers have been harvested, they are typically delivered in the form of bast fiber bundles. Before the bast fibers are processed, any impurities that come with the harvest, such as soil, plant residues, and the like, must be removed. In addition, the fibers, which are typically up to 1200 mm long, must be shortened for further use of the bast fibers as bast thread and later as fiber web.
  • One solution from the state of the art involves placing the bast fiber bundles in a pot-like container during or after combing and then applying fluids, such as water, to them and cleaning them. This allows combing to be stopped at the desired fiber length and the desired purity to be achieved by cleaning.
  • the disadvantage of this is that the cleaning process is extremely discontinuous. Cleaning the bast fiber bundles, in particular removing the fiber bast, inline with continuous further processing of the bast fibers is not possible.
  • a cyclic washing system in the sense of the present invention includes cyclic washing systems in the narrower sense, such as those used in the industrial laundry of textiles.
  • cyclic washing systems in the sense of the present invention also include machines which continuously transport and clean bast fiber bundles from an input side, where the bast fiber bundles are fed into the machine, to an output side, where the bast fibers are discharged from the machine.
  • a dissolving drum, in particular for recycling cardboard can be understood as a cyclic washing system in the sense of the present invention.
  • a cyclic washing system in the narrower sense has several washing drums which can be rotated synchronously with one another around a common axis of rotation.
  • the bast fiber bundles are placed in a first washing drum of the cyclic washing system.
  • a fluid such as water
  • the bast fiber bundles are wetted.
  • the bast fiber bundles are preferably transported by a partial or complete rotation of the washing drums into a second washing drum of the cyclic washing system, which is arranged adjacent to the first washing drum.
  • a slide-like guide track is preferably provided which connects the first washing drum to the second washing drum.
  • the bast fiber bundles pass via the guide track into the second washing drum. It is conceivable that the second washing drum synchronously with the first washing drum and synchronously with all other washing drums in the cyclic washing system.
  • the bast fiber bundles are gradually transported from washing drum to washing drum, and the impurities to be removed, in particular the bast fiber enveloping the bast fibers, enter the surrounding fluid, the so-called washing liquor.
  • the impurities separated from the fiber bundles and bast fibers can then be discharged from the cyclic washing system, for example with the liquor, and the bast fibers can be cleaned with it. Finally, the isolated bast fibers can be discharged from the cyclic washing system at the last washing drum in the cyclic washing system.
  • additives for example for cleaning the bast fiber bundles and/or for breaking down the bast fiber, are added to the water used to apply pressure to the bast fiber bundles in the washing drum(s). It is also conceivable that the water is tempered, in particular heated. It is conceivable that the bast fiber bundles or bast fibers are exposed to water in all washing drums.
  • the bast fiber bundles or the bast fibers are not exposed to water in all washing drums. It is also conceivable that the bast fiber bundles or the bast fibers are not exposed to a liquid in some washing drums or are exposed to a liquid other than water.
  • a bast thread For the production of a bast thread according to the invention, it is provided that in a third step the bast fibers of the processed bast fiber bundles are spun into the bast thread, wherein the processed bast fibers (1) are preferably fed continuously to the third step
  • a method for producing a fiber web is also disclosed, wherein spinnable bast fibers are provided according to a method according to claim 1 and laid to form the fiber web, preferably a nonwoven fabric web.
  • the laying of the bast fibers to form the fiber web is preferably carried out dry. It is conceivable, for example, that the bast fibers are laid using an airlaid process. However, it is also conceivable that the bast fibers are wetlaid in a wetlaid process.
  • the bast fibers can also be laid as a carded layer or as pulp.
  • impurities in the bast fiber bundles and/or fiber accompanying substances in the bast fiber bundles are removed.
  • This enables the bast fibers to be safely processed further into high-quality bast fibers, bast threads and fiber webs.
  • the cyclic washing system the cleanliness from washing drum to washing drum is increased as the bast fiber bundles pass through.
  • good removal of impurities and fiber accompanying substances can be achieved by using surfactants, for example, and by mechanical processing within the washing drums.
  • surfactants for example, and by mechanical processing within the washing drums.
  • mechanical processing it can be provided, for example, that impact surfaces are provided in the washing drums, which collide with the bast fiber bundles when the washing drums swing. Colloidal contamination in particular can be dissolved in this way and carried away with the water.
  • the bast fibers of the bast fiber bundles are shortened for further processing in the third step.
  • the bast fibers are preferably shortened to a fiber length of 1 mm to 50 mm and particularly preferably to a fiber length of 5 mm to 25 mm.
  • the bast fibers are shortened in the cyclic washing system.
  • the bast fibers of the bast fiber bundles are typically too long to be spun into a bast thread or laid into a nonwoven fabric web.
  • the fiber length can be determined by programming the cyclic washing system.
  • the combination of the amplitude and frequency of the vibrations of the washing drums and the passage time of the bast fibers through the cyclic washing system is important here, as is the amount of water added, which influences the degree of cleaning and the achieved fiber length can be taken.
  • fiber lengths of 1 mm to 50 mm and especially from 5 mm to 25 mm the bast fibers can be processed well and easily.
  • the bast fibers of the bast fiber bundles are degumming.
  • Experts also refer to this as degumming, i.e. the removal of lignin and dyes from the bast fiber bundle. This separates the bast fibers from the bast fiber bundle so that the bast fibers are cottonized.
  • sodium carbonate and/or caustic soda are added to the bast fiber bundles in the cyclic washing system for degumming.
  • the bast fibers are degumming in a sustainable manner without causing environmental pollution, by bringing about an enzymatic degradation of the fiber bast instead of the previously mentioned chemicals.
  • enzymes are added to the bast fiber bundles in the cyclic washing system for this purpose.
  • the bast fibres are bleached in the cyclic washing system, for example by adding sodium chloride and/or hydrogen peroxide to the debasted bast fibres in the cyclic washing system.
  • the bast fiber bundles are delivered for provision. No cleaning of the bast fiber bundles takes place between delivery and the second step.
  • the bast fiber bundles therefore do not undergo discontinuous cleaning in a pot-like container. This enables very efficient production of the bast fibers, the bast thread and the fiber web.
  • the bast fiber bundles are mechanically pre-cleaned in a pre-treatment room connected to the cyclic washing system before they pass through the cyclic washing system.
  • an air stream is used for this purpose. This advantageously ensures that less dirt is introduced into the cyclic washing system. Coarse dirt can be removed before the cyclic washing system passes through, but directly at the cyclic washing system and in particular inline.
  • the pre-cleaning The air flow protects the bast fibres so that, despite pre-cleaning, the desired fibre length can be achieved with the programmed cycle washing system.
  • the bast fibers are continuously fed into the third step, which results in a significant increase in the efficiency of the manufacturing process.
  • the efficiency of the manufacturing process is preferably further increased by carrying out the second step inline with the third step.
  • a further object for solving the problem set at the beginning is a system for producing a bast thread according to the method according to the invention.
  • the system has a cyclic washing system for processing bast fiber bundles and a unit for spinning the bast fibers, arranged downstream of the cyclic washing system in the processing direction. It is preferably provided that the cyclic washing system is arranged inline with the unit for spinning the bast fibers. This makes it possible for bast fibers to be continuously transferred to the unit for spinning the bast fibers.
  • the system for producing a fiber web has a cyclic washing system for processing bast fiber bundles and a unit for laying the fiber web arranged downstream of the cyclic washing system in the processing direction.
  • the cyclic washing system is arranged inline with the unit for laying the fiber web. This makes it possible for bast fibers to be continuously transferred to the unit for laying the fiber web.
  • a pre-treatment room is arranged in the processing direction before the cyclic washing system, which is intended to mechanically pre-clean the bast fiber bundles before they pass through the cyclic washing system.
  • the pre-treatment room is a washing drum of the cyclic washing system, in which the bast fiber bundles are not exposed to water. It is also conceivable that the pre-treatment room is a separate unit in the processing direction before the cyclic washing system, which is connected to the cyclic washing system, for example via a conveyor belt.
  • a dewatering unit for dewatering the bast fibers is provided in the processing direction after the cyclic washing system and before the unit for spinning the bast fibers.
  • the dewatering unit has a press and/or a centrifuge and/or a sieve belt with suction boxes arranged underneath.
  • Fig. 1 a schematic view of a system according to an exemplary
  • Fig. 2 a schematic view of a plant for producing a fiber web according to an exemplary embodiment of the above disclosure for carrying out a method for producing a fiber web disclosed above.
  • Figure 1 shows a system 100 according to exemplary embodiments of the present invention for carrying out a method according to an exemplary embodiment of the present invention.
  • the system 100 is intended for producing a bast thread 10 from spinnable bast fibers 1.
  • bast fiber bundles 2 are delivered directly from the field and fed to a pre-treatment room 3, for example via a conveyor belt (not designated).
  • a second step II of producing the fiber web 10 begins in the preparation room 3.
  • the bast fiber bundles 2 are mechanically pre-cleaned.
  • an air stream inside the pre-treatment room 3 captures coarse dirt particles and foreign substances and removes them from the fiber bundles 2. This pre-cleaning serves to introduce less dirt into subsequent cleaning steps of the second step II.
  • the cyclic washing system 4 has several washing drums 4.1, 4.2, 4.3, 4.4, 4.5, which are arranged adjacent to one another along the processing direction Z.
  • the washing drums 4.1, ..., 4.5 can be rotated synchronously or independently of one another about a rotation axis D.
  • the bast fiber bundles 2 enter a first washing drum 4.1 of the cyclic washing system 4.
  • the first washing drum 4.1 oscillates about the rotation axis D. Inside the first washing drum 4.1, the bast fiber bundles 2 are exposed to water.
  • the bast fiber bundles 2 come into contact with stop surfaces 7 inside the first washing drum 4.1.
  • the mechanical processing also shortens the bast fibers 1 of the bast fiber bundles 2.
  • the washing drums 4.1, ..., 4.5 rotate in such a way that the bast fiber bundles 2 or the bast fibers 1 are transported with a guide track 8 from the first washing drum 4.1 along the processing direction Z into a second washing drum 4.2.
  • the bast fiber bundles 2 or the bast fibers 1 are also processed by swinging the second washing drum 4.2 and, at the appropriate time, are transported along the processing direction Z into the next washing drum 4.3 of the cyclic washing system 4.
  • the bast fibers 1 thus pass through all of the washing drums 4.1, ..., 4.5 of the entire cyclic washing system 4. It is conceivable that the bast fiber bundles 2 are degummed in the cyclic washing system 4.
  • the cyclic washing system 4 can be adjusted so that a desired cleaning performance of the bast fiber bundles 2, a desired de-basting and a desired shortening of the fiber length of the bast fibers 1 is achieved. For this purpose, corresponding vibration frequencies, vibration amplitudes, water levels in the washing drums 4.1, ..., 4.5 or water temperatures are adjusted.
  • the bast fibres 1 After passing through the cycle washing system 4, the bast fibres 1 are fed to a dewatering unit 5.
  • the Bast fibres 1 are mechanically dewatered. This can be done, for example, by pressing, centrifuging or by suction in the dewatering unit 5.1.
  • the dewatering unit 5.1 is followed by the drying unit 5.2.
  • the drying unit 5.2 the dewatered bast fibers 1 are dried by heating. The heating ensures that adhering surface water from the bast fibers 1, which cannot be removed mechanically, evaporates.
  • the cyclic washing system 4 it is possible to continuously pass cleaned and shortened bast fibers 1 to the unit 6 for spinning the bast fibers 1 for further processing without major interruptions.
  • the cleaning of the bast fiber bundles 2, the debasting of the bast fiber bundles 2 into bast fibers 1 and the shortening of the bast fibers 1 to a length that is suitable for further processing take place inline. This makes the production process of the fiber web 10 significantly more efficient.
  • Figure 2 shows a system 101 for producing a fiber web 11 as disclosed above and with which a method for producing a fiber web 11 is carried out as disclosed above.
  • the system 101 for producing the fiber web 11 corresponds to the system 100 shown in Fig. 1 except for the feature that instead of a unit for spinning the bast fibers, a unit 9 for laying the fiber web 11 is provided in a further third step IIIa.
  • the unit 9 for laying the fiber web 11 can be designed to lay the fiber web 10 dry, for example using an airlaid process. However, it is also conceivable that the unit 9 for laying the fiber web 11 is designed to lay the fiber web 11 wet.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Molecular Biology (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention concerne un procédé de production de fibres libériennes pouvant être filées et un procédé de production d'un fil libérien (10) où, dans une première étape, des fibres libériennes (1) sont fournies sous la forme de faisceaux de fibres libériennes (2) et, dans une seconde étape, les faisceaux de fibres libériennes (2) sont traités dans un système de lavage par lots (4). L'invention concerne également un système.
PCT/EP2024/065394 2023-06-05 2024-06-05 Procédé et système de production de fibres libériennes pouvant être filées ou d'un fil libérien Pending WO2024251769A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023114715.3 2023-06-05
DE102023114715.3A DE102023114715A1 (de) 2023-06-05 2023-06-05 Verfahren und Anlage zum Herstellen von verspinnbaren Bastfasern bzw. eines Bastfadens

Publications (1)

Publication Number Publication Date
WO2024251769A1 true WO2024251769A1 (fr) 2024-12-12

Family

ID=91431275

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/065394 Pending WO2024251769A1 (fr) 2023-06-05 2024-06-05 Procédé et système de production de fibres libériennes pouvant être filées ou d'un fil libérien

Country Status (2)

Country Link
DE (1) DE102023114715A1 (fr)
WO (1) WO2024251769A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317681B1 (fr) * 1987-11-19 1993-06-16 Lin Developpement S.A. Procédé de préparation en continu de tiges de végétaux et installation de préparation permettant la mise en oeuvre dudit procédé
BE1014496A3 (nl) * 2001-11-28 2003-11-04 Dommele Engineering Nv Van Inrichting voor het winnen van vezels uit bastvezels.
CN101451274A (zh) * 2007-12-07 2009-06-10 李朝康 苎麻脱胶、梳理连续化生产工艺
WO2011088750A1 (fr) * 2010-01-22 2011-07-28 汉麻产业投资控股有限公司 Chaîne de production de fibre du liber du chanvre
CN102939414A (zh) * 2010-06-03 2013-02-20 佩莱若林·米尔诺公司 连续批量隧道式洗衣机及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE823022C (de) * 1949-10-04 1951-11-29 Dr Emil Gminder Verfahren und Vorrichtung zum Waschen, Entwaessern und Aufloesen von nassbehandeltenFasern, insbesondere Bastfasern
DE3730687C2 (de) * 1987-09-12 1996-07-18 Claas Saulgau Gmbh Verfahren zur Aufbereitung von Flachs
EP0706585B1 (fr) * 1993-06-30 1997-08-27 WINDI WINDERLICH GmbH Procede de traitement de fibres de sclerenchyme, notamment du lin
DE19831433A1 (de) * 1998-07-06 2000-01-13 Lothar Rauer Verfahren und Anordnung zur Gewinnung von Naturfasern, insbesondere Bambusfasern, die den Zweck der Verstärkung erfüllen
DE102013009526A1 (de) * 2013-06-07 2014-12-11 Spengler Technology UG (haftungsbeschränkt) Anlage zur herstellung von fasern aus bambus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317681B1 (fr) * 1987-11-19 1993-06-16 Lin Developpement S.A. Procédé de préparation en continu de tiges de végétaux et installation de préparation permettant la mise en oeuvre dudit procédé
BE1014496A3 (nl) * 2001-11-28 2003-11-04 Dommele Engineering Nv Van Inrichting voor het winnen van vezels uit bastvezels.
CN101451274A (zh) * 2007-12-07 2009-06-10 李朝康 苎麻脱胶、梳理连续化生产工艺
WO2011088750A1 (fr) * 2010-01-22 2011-07-28 汉麻产业投资控股有限公司 Chaîne de production de fibre du liber du chanvre
CN102939414A (zh) * 2010-06-03 2013-02-20 佩莱若林·米尔诺公司 连续批量隧道式洗衣机及方法

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Publication number Publication date
DE102023114715A1 (de) 2024-12-05

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