EP2162577B1 - Dispositif et procédé de traitement d'une pâte fibreuse - Google Patents

Dispositif et procédé de traitement d'une pâte fibreuse Download PDF

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Publication number
EP2162577B1
EP2162577B1 EP08756838.2A EP08756838A EP2162577B1 EP 2162577 B1 EP2162577 B1 EP 2162577B1 EP 08756838 A EP08756838 A EP 08756838A EP 2162577 B1 EP2162577 B1 EP 2162577B1
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EP
European Patent Office
Prior art keywords
fiber
fiber mass
pressure chamber
treatment fluid
treatment
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.)
Not-in-force
Application number
EP08756838.2A
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German (de)
English (en)
Other versions
EP2162577A1 (fr
Inventor
Christoph Schrempf
Werner Richardt
Heidrun Fuchs
Rudolf Aigner
Helmut Fuchs
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.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
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Publication of EP2162577A1 publication Critical patent/EP2162577A1/fr
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Publication of EP2162577B1 publication Critical patent/EP2162577B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/02—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fibres, slivers or rovings
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B5/00—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating
    • D06B5/02—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating through moving materials of indefinite length
    • D06B5/04—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating through moving materials of indefinite length through slivers or rovings

Definitions

  • the present invention relates to a device and a method for treating a fiber mass during its transport with a treatment fluid.
  • Fibers often have to be treated with fluid substances during their manufacture or further processing. These substances are generally liquids, vapors or gases needed for washing, bleaching, dyeing, impregnating, applying auxiliary agents such as finishes, sizings or surface finishes, as well as for intermediate treatments such as heating, drying or wetting.
  • the fibers are in particular artificial fibers based on cellulose, such as viscose, cellulose carbamate or lyocell fibers or synthetic polymers such as polyesters, polyolefins, aramids, polyimides, fluoropolymers and others. These fibers are usually cut, ie with a defined single fiber length. But the treatment of natural fibers such as cotton, wool, flax and other fibers of plant or animal origin is possible.
  • a large amount of these fibers is to be treated continuously at the same time.
  • Widely used are methods in which a plurality of individual filaments, a so-called fiber cable, extruded from a spinneret and further cut into staple fibers. These staple fibers are floated to a nonwoven fabric. Comparable non-woven fabrics are formed in the course of processing of natural fibers such as wool or cotton. These can also be treated with the device according to the invention and the method according to the invention.
  • Known fiber treatment processes consist for example in that fiber cables are cut to the desired length, the fibers are floated to form a fiber fleece and deposited on a wire belt.
  • a general description of nonwoven fabrics can be found in Götze, "Chemiefasern nach den Viskoseclar", 1967, pages 881-884 , The homogeneous web is drizzled, sprayed or poured from above with a treatment liquid in countercurrent flow. The treatment liquid penetrates by its own weight through the fleece through and washes the fleece out. In the fleece, a diffusion process takes place between the mobile fleet, which flows vertically in total, and the fleet immobilized in the fiber. At the end or between different washing fields, a desired nonwoven moisture can be adjusted by means of a pair of rollers. In order to achieve a better washout result, nonwoven fabric and washing liquid are usually passed in countercurrent. Such methods are also in the WO 00/18991 , of the AT 413286 B as well as in the AT 413285 B described.
  • a nonwoven fabric In principle, similar methods are also suitable for the impregnation of a nonwoven fabric.
  • the homogeneous fiber fleece is drizzled with the impregnating solution, sprayed or poured and then pressed to the desired degree of moisture. This process can also take place in several sequences.
  • an emulsion or suspension can be applied to the fiber.
  • An example of this is the so-called softening, wherein a lubricant is applied to the fiber.
  • Avivages are excipients that are used, among other things, to give the fiber better processing properties. They are to improve, for example, the thread closure, the winding capacity and the handle, reduce the thread friction and impart antistatic properties.
  • These lubricants are generally available as emulsions or suspensions.
  • a homogeneous nonwoven fabric it may be sprayed from above and / or from below with steam or passed along steam heated convection radiant panels.
  • a method in which a rotating press roll presses liquid initially contained from an incoming fiber mass in a compression zone by compacting the fiber mass and then drawing in a treatment fluid during reexpansion of the fiber mass in an expansion zone.
  • a high mechanical pressure must be applied by the press roll to densify the web.
  • rapid absorption of the treatment fluid is dependent on the suction effect of the nonwoven and thus, inter alia, on the expansion speed of the nonwoven.
  • Another disadvantage is that only a comparatively small amount of treatment fluid can be sucked in.
  • treatment fluid may already be injected into the densified nonwoven web to rinse out an earlier treatment fluid from the previous treatment step. Due to the fiber mass, which is already highly compressed at this point, the possible backmixing into the preceding press-off operation and the sealing problem in the press roll, this embodiment appears rather disadvantageous.
  • gaseous or vapor treatment fluids the method of WO 03/004750 not suitable.
  • the DE-A-2307554 discloses the treatment of fiber masses with fluids through a substantially stationary pressure chamber through which the pulp is passed. Here, appropriate sealing measures are taken.
  • DE-A-2307554 Although it mentions two chamber walls moving with the material, this refers to the lower and upper conveyor belt. At the same time, however, the chamber should also contain stationary side walls. Another limitation of the Chamber of DE-A-2307554 is the necessary for sealing, also stationary pressure roller pair.
  • the pressure chamber according to the DE-A-2307554 is thus formed by a complex interaction of movable and stationary wall elements in which different types of sealing must be combined.
  • the DE-A-1269586 describes a device in which the fiber mass is filled in an endless chain of containers and these containers are then passed through a pressure chamber in which the pulp is treated.
  • This solution is very complicated, since it requires a large number of individual containers, which are mechanically connected to one another in an intricately complicated manner for receiving the fiber mass, and additionally a pressure chamber with corresponding sealing devices to the containers.
  • special devices for filling and emptying the containers are needed.
  • the device of DE-A-1269586 requires a large number of containers, each with a lid and in addition a pressure chamber and is therefore very expensive to produce.
  • the object of the present invention was to provide a device and a method with which a fiber mass can be treated faster and more homogeneously with a treatment fluid in order to increase the quality and production capacity and save as much as possible chemicals so that, for example, when converting an existing fiber treatment plant, the production capacity can be significantly increased or when building a new fiber treatment plant compared to a system according to the prior art lower investment and less space are needed.
  • the solution to this problem is a device for treating a fiber mass (1) with a treatment fluid according to claim 1.
  • the terms "pulp” and “nonwoven” are used as synonymous. In it, the fibers are disordered.
  • the at least one pressure chamber towards the fiber mass is designed to be open.
  • the fact that the pressure chamber is designed to open towards the pulp mass means that the side of the pressure chamber facing the pulp mass has no wall.
  • the pressure chamber may have a coarse mesh grid on its open side to prevent the Fiber mass penetrates too far into the pressure chamber during treatment.
  • a perforated plate with large holes or a similar permeable partition can be used.
  • the fiber transport device and thus also the fiber mass to be treated several meters wide generally between about 1 m and 4.6 m.
  • the distributor is about 1 m long in the fiber transport direction.
  • the entry of the treatment fluid into a pressure chamber can be done by a simple, usually centrally located in the top opening (5). Since the fluid for rapid filling of the pressure chamber usually flows at a higher speed, a device is preferably attached to the inlet opening, with which the fluid can be distributed within the pressure chamber. Such a device may for example be a baffle plate. Likewise, annular or other distribution systems are possible. They are intended to prevent the fluid from hitting the batt directly at high speed and changing its structure, for example by creating pits.
  • the required chamber size and the clear height depend strongly on the product type and on the homogeneity of the nonwoven. Inhomogeneous nonwovens require a smaller area of the single chamber. Wet-rigid nonwovens swell up more and require larger chamber height. On the one hand, the pressure chamber should be able to be filled quickly, so it must not have too much volume. On the other hand, the chamber must not be so flat that it is completely filled by the swelling fiber mass. For cellulosic fibers a clear height of the pressure chamber of about 1 - 5 cm is best. The area of a single pressure chamber can be between 100 and 40,000 cm 2 .
  • the distribution device generates a surface pressure on the nonwoven fabric by means of the treatment fluid.
  • the overpressure of the treatment fluid in the pressure chamber is usually between 0.2 and 1 bar.
  • the vapor pressure is established over the nonwoven, which corresponds to the balance between nonwoven resistance, tightness of the pressure chamber and the amount of steam supplied.
  • the pressure chamber was supplied with a 15 bar steam. In this case, between 62 and 1250 kg of steam were injected per m 2 . About the fleece while a temperature of max. 131 ° C measured. This corresponds to an overpressure of 1.7 bar.
  • the residence time in a treatment field can be in conventional cases about 10 to 70 s, preferably even only 15 to 40 s.
  • the ratio of the flow rate (expressed as mass) of the treatment fluid to the mass of the nonwoven may be referred to as the liquor ratio.
  • This liquor ratio depends on the pressure of the treatment fluid, the thickness and swelling behavior of the web, and other factors. It can, in particular, when the treatment fluid is a liquid, easily flow rates can be achieved, which correspond to 40 times and more of the mass of the web, so liquor ratios of 40 and more. Also liquor ratios of more than 100 are conceivable with appropriate pressure of the treatment fluid.
  • the device according to the invention and the method according to the invention are, in particular, if the treatment fluid is a Gas or steam is also suitable for very low liquor ratios. Due to the homogeneous, rapid distribution of the treatment fluid in the fiber mass in these cases often only liquor ratios of less than 2.0 and in particular less than 1.0 may be necessary to achieve the desired effect. Likewise, the uniformity of the distribution of the treatment fluid between upper, middle and lower layers of the web is significantly improved.
  • the distributor is movable parallel to the direction of movement of the fiber mass and vertically to the direction of movement of the fiber mass ( FIG. 1 ).
  • the distribution device can be placed on the current fiber transport device at a predetermined location (step (A)) and is guided with the fiber mass for a defined time (steps (B) to (C)).
  • the treatment of the fiber mass with the treatment fluid is carried out by treatment fluid is passed through a supply line in the distribution device.
  • the treatment fluid is passed under pressure into the distributor.
  • the distribution device is lifted at a likewise predetermined point of the fiber transport device (step ( D )) and returned at a distance from the fiber mass back to the Aufsetzstelle.
  • the distributor must be moved so that in the cycle which has now begun, it treats the surface of the fiber fleece which lies exactly behind the surface which was treated in the preceding cycle.
  • the distribution device can also be designed so that it has several units of pressure chambers and that these units can be moved independently. These units may be arranged side by side so that a strip of the nonwoven fabric can be treated with the pressure chambers of each unit. In this case, a unit can be moved on the fiber fleece, while a unit arranged next to it is being lifted.
  • Such a plurality of units is conceivable, in particular, when the nonwoven to be treated is so wide that a single unit would be so large and heavy that it would have mechanical disadvantages compared with a number of smaller units.
  • a preferred embodiment of the device according to the invention is designed so that the pressure chamber can be brought so close to the fiber transport device that the side walls of the pressure chamber touch the fiber mass.
  • the fiber mass is strongly compressed, as z. B. happens at a press roll.
  • the fiber mass would be strongly compressed, so that the treatment fluid could no longer flow unhindered and fast enough through the fiber mass and thus rather prolongs the treatment time or the treatment result, such as washing out, would be worsened.
  • Such a strong swelling occurs, for example, when treating cellulosic fibers such as viscose or lyocell with aqueous media, while no significant swelling of the nonwoven fabric is observed when treating polyester fibers with water. This must be taken into account, for example, in the design of the mechanical guidance of the distributor.
  • the side walls of the pressure chamber are designed to seal the pressure chamber from the atmosphere upon contact with the pulp. For this purpose, it is generally sufficient that these side walls have a closed, round running, lower flat surface or edge (6).
  • This sealing surface or edge which is placed on the fiber mass, may additionally be profiled, for example. Additional elastic sealing materials are generally not necessary because the pulp itself, which is mostly swollen, is the elastic counterpart. It is not necessary to prevent any escape of treatment fluid. This would be possible only by strong pressing the pressure chamber on the pulp, but this is not desirable. The small amounts of laterally exiting treatment fluids can be easily detected by the anyway necessary collection system with.
  • This support plate is preferably provided continuously and at defined locations with drainage openings (8), which allow the outflow of the treatment fluid. In segments without drainage openings, the treatment fluid can not flow away, so that a longer treatment time is achieved there. Instead of openings in a long support plate and open spaces between shorter support plates can allow the flow of treatment fluid from the pulp and the wire belt.
  • a fiber transport device or screen belt for both embodiments, all suitable to those skilled appear devices, in particular belts, belts, link chains ("tank chain”), nonwoven belts, knitted or woven bands of metals, plastics, plastic-coated metals or the like in question. Also, continuous conveyor belts with corresponding perforations, for example, fabric-reinforced rubber bands may be suitable depending on the application.
  • the invention also provides a process for treating a fiber mass (1) on a fiber transport device (4) with a treatment fluid according to claim 3.
  • the pressure chamber which is designed to be open towards the fiber mass, is placed on the fiber mass (A) at the beginning of the treatment time, while the treatment time moves at substantially the same speed as the fiber mass in the fiber transport direction (B) - ( C), lifted at the end of the treatment time of the fiber mass (D) and placed again on a not yet treated portion of the fiber mass.
  • the fiber transport device or the wire belt corresponds to that already described for the device according to the invention.
  • the pulp is preferably a staple fiber fleece.
  • a fleece made of lyocell staple fiber was treated with aqueous sodium hydroxide solution. Also at the end of this treatment field, the sodium hydroxide content was determined in each case in the liquor and in the fiber in different layers of the nonwoven by sampling and subsequent titration. Table 1 shows the deviations from the average value. Table 1: Deviation of the NaOH content from the average value in [%] example 1 2 sampling fleet fiber fleet fiber Above +44 +47 +2 +7 center -3 -4 +0.5 +4 Below -40 -43 -2.5 -11
  • Example 2 On a fiber treatment device according to the prior art as in Example 1 or according to the present invention as in Example 2, a Lyocell staple fiber nonwoven fabric having a basis weight of 6 kg / m 2 was first pressed with a press roller and then treated with fresh water.
  • Table 2 shows the treatment time required in each case, which is substantially shorter than in accordance with Example 3 according to the prior art, despite in some cases considerably higher wash liquid throughputs in the device according to the invention of Examples 4 to 6.
  • Table 2 Treatment time with liquid treatment device default pressure chamber example 3 4 5 6 Fleet ratio (m / m) 18 25 44 55 swelling factor 1.6 2.1 2.5 2.7 Overpressure [bar] No 0.3 0.5 0.7 Treatment time [s] 107 20 20 20 20 20 20
  • Example 1 On a fiber treatment device according to the present invention as in Example 1, a Lyocell staple fiber nonwoven fabric having a basis weight of 6 kg / m 2 was first pressed with a press roll and then treated with saturated steam.
  • Table 3 shows the treatment times each needed to heat the web uniformly around 85 ° C everywhere. With the device according to the invention of Example 8, this succeeded in a much shorter time than in Example 7 according to the prior art. Nevertheless, in the device according to the invention considerably less steam, based on the amount of fiber was required than in the device according to the prior art. Table 3: treatment time with saturated steam default pressure chamber example 7 8th liquor ratio 1.7 0.4 swelling factor 1.05 1.05 Overpressure [bar] No 1.2 Treatment time for heating at 85 ° C [s] 52 23

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (6)

  1. Dispositif destiné au traitement d'une masse de fibres (1) avec un fluide de traitement, comprenant
    • un dispositif de distribution (2) du fluide de traitement avec au moins une chambre de compression (3) et
    • un dispositif de transport des fibres (4) pour la masse de fibres (1) qui soit perméable au fluide de traitement,
    la largeur de l'ensemble des chambres de compression (3) correspondant en substance à la largeur prévue pour la masse de fibres (1) sur le dispositif de transport des fibres (4), lequel présente au moins une chambre de compression (3) ouverte en direction de la masse de fibres (1), la chambre de compression (3) pouvant être rapprochée du dispositif de transport des fibres (4) de manière à ce que les parois latérales de la chambre de compression (3) touchent la masse de fibres (1), les parois latérales étant conçues de manière à rendre la chambre de compression (3) étanche à l'atmosphère au contact de la masse de fibres (1), caractérisé en ce que le dispositif de distribution (2) est mobile parallèlement au sens de déplacement de la masse de fibres (1) et à la verticale du sens du déplacement de la masse de fibres (1).
  2. Dispositif selon la revendication 1, le dispositif de transport des fibres (4) étant une bande, une bande filtrante, une bande à maillons, une chaîne à maillons, une étoffe non-tissée, une étoffe tricotée, un tissu ou un tapis de transport continu perforé.
  3. Procédé de traitement d'une masse de fibres (1) sur un dispositif de transport des fibres (4) avec un fluide de traitement, le fluide de traitement étant pressé par surpression dans la masse de fibres (1) via une chambre de compression (3), au moins une chambre de compression (3) étant ouverte en direction de la masse de fibres (1) et le fluide de traitement pouvant s'écouler de la masse de fibres (1), la chambre de compression (3) pouvant être rapprochée du dispositif de transport des fibres (4) de manière à ce que les parois latérales de la chambre de compression (3) touchent la masse de fibres (1), et les parois latérales étant conçues de manière à rendre la chambre de compression (3) étanche à l'atmosphère au contact de la masse de fibres (1),
    caractérisé en ce que la chambre de compression (3) est pressée sur la masse de fibres (1) au début du temps de traitement, se déplace dans le sens de transport des fibres à une vitesse en substance identique à celle de la masse de fibres (1) pendant le temps de traitement, et se soulève de la masse de fibres (1) à la fin du temps de traitement, avant de se poser à nouveau sur une partie non encore traitée de la masse de fibres (1).
  4. Procédé selon la revendication 3, le fluide de traitement étant un liquide, une émulsion, une suspension, un gaz ou une vapeur.
  5. Procédé selon la revendication 3, le dispositif de transport des fibres (4) étant une bande filtrante.
  6. Procédé selon la revendication 3, la masse de fibres (1) étant un non-tissé de fibres discontinues.
EP08756838.2A 2007-07-11 2008-06-25 Dispositif et procédé de traitement d'une pâte fibreuse Not-in-force EP2162577B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0107907A AT504649B1 (de) 2007-07-11 2007-07-11 Vorrichtung und verfahren zur behandlung einer fasermasse
PCT/AT2008/000228 WO2009006653A1 (fr) 2007-07-11 2008-06-25 Dispositif et procédé de traitement d'une pâte fibreuse

Publications (2)

Publication Number Publication Date
EP2162577A1 EP2162577A1 (fr) 2010-03-17
EP2162577B1 true EP2162577B1 (fr) 2018-11-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08756838.2A Not-in-force EP2162577B1 (fr) 2007-07-11 2008-06-25 Dispositif et procédé de traitement d'une pâte fibreuse

Country Status (6)

Country Link
EP (1) EP2162577B1 (fr)
CN (1) CN101802286B8 (fr)
AT (1) AT504649B1 (fr)
BR (1) BRPI0814222B1 (fr)
TW (1) TWI461584B (fr)
WO (1) WO2009006653A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106948078B (zh) * 2017-03-24 2018-12-11 嘉兴万源时装有限公司 一种针织物的处理装置
CN110344188B (zh) * 2019-07-09 2021-11-19 张家港市金立纳米高弹材料有限公司 一种编织曲丝的蒸丝装置及方法
CN113752354B (zh) * 2021-09-23 2022-11-11 福建军翔复合材料科技有限公司 一种植物纤维毯编织设备

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BE361086A (fr) * 1928-06-11
NL61117C (nl) * 1946-03-27 1948-05-15 Algemene Kunstzijde Unie Nv Werkwijze en inrichting voor het continu nabehandelen van textielvezels met vloeistoffen door besproeiing alsmede de volgens deze werkwijze behandelde producten
US2724955A (en) * 1949-11-08 1955-11-29 Spooner William Wycliffe Apparatus for washing loose wool
DE1145297B (de) * 1955-06-30 1963-03-14 Courtaulds Ltd Vorrichtung zum Weiterfuehren von losen Stapelfasern durch eine Behandlungsfluessigkeit
US3393537A (en) * 1965-12-06 1968-07-23 Unisearch Ltd Apparatus for the treatment of fibre assemblies with fluids
DE1635171B2 (de) * 1966-08-27 1977-02-24 Clermont Vinas, Maria Teresa, Sabadell, Barcelona (Spanien) Vorrichtung zum durchfuehren einer mehrzahl von behandlungen mit unterschiedlichen behandlungsmitteln an fortlaufend im strang gefoerdertem fasergut
DE2031475A1 (de) * 1969-07-02 1971-03-18 Iwanowskoje spesialnoje konstruk torskoje büro krasilno otdelotschnowo oborudowanija, SSSR Iwanowo (Sowjet union) Einrichtung zur Flussigkeitsbe handlung eines sich im Strom kontinuier hch bewegenden Fasergutes
FR2660942B1 (fr) * 1990-04-11 1994-09-09 Kaysersberg Sa Procede d'impregnation en continu d'une nappe textile.
DE4211055C2 (de) * 1992-04-02 1997-01-23 Kuesters Eduard Maschf Breitwaschmaschine zum kontinuierlichen Waschen eines bahnförmigen textilen Gewebes
AT406588B (de) * 1998-09-29 2000-06-26 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer fasern
DE10132214A1 (de) * 2001-06-30 2002-06-06 Zimmer Ag Verfahren und Vorrichtung zum Behandeln einer Fasermasse

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Title
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Also Published As

Publication number Publication date
EP2162577A1 (fr) 2010-03-17
BRPI0814222B1 (pt) 2021-02-02
TWI461584B (zh) 2014-11-21
AT504649A4 (de) 2008-07-15
CN101802286A (zh) 2010-08-11
CN101802286B8 (zh) 2017-06-16
AT504649B1 (de) 2008-07-15
TW200932984A (en) 2009-08-01
WO2009006653A1 (fr) 2009-01-15
CN101802286B (zh) 2013-02-06
BRPI0814222A2 (pt) 2015-01-06

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