EP0969131A1 - Dispositif et procédé pour le traitement des textiles - Google Patents

Dispositif et procédé pour le traitement des textiles Download PDF

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Publication number
EP0969131A1
EP0969131A1 EP99202091A EP99202091A EP0969131A1 EP 0969131 A1 EP0969131 A1 EP 0969131A1 EP 99202091 A EP99202091 A EP 99202091A EP 99202091 A EP99202091 A EP 99202091A EP 0969131 A1 EP0969131 A1 EP 0969131A1
Authority
EP
European Patent Office
Prior art keywords
transducer
interference
ultrasonic vibrations
vibration cavity
textile substrate
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.)
Withdrawn
Application number
EP99202091A
Other languages
German (de)
English (en)
Inventor
René Breeuwer
Karel Frieling
Hendrik Gooijer
Jeroen Dunnewijk
Jan Willem Gerritsen
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.)
Stork Brabant BV
Original Assignee
Stork Brabant BV
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
Priority claimed from NL1009525A external-priority patent/NL1009525C2/nl
Application filed by Stork Brabant BV filed Critical Stork Brabant BV
Publication of EP0969131A1 publication Critical patent/EP0969131A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • D06B13/00—Treatment of textile materials with liquids, gases or vapours with aid of vibration

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a device of this nature is known from Austrian patent AT 402 076 B.
  • wet treating processes are often used. Examples of such processes are dyeing, finishing, enzymatic processes, pretreatment processes, washing and rinsing.
  • the liquid used is water with an added agent which is suitable for the desired treating process, or possibly without any added agent.
  • the said Austrian patent describes a device in which a textile substrate is conveyed through a treatment liquid bath. Inside the bath a transducer is present for transmitting ultrasonic vibrations towards a reflection surface laying opposite of the transducer. The textile substrate is conveyed between the transducer and the reflection surface in such a way, that the substrate is essentially in contact with the transducer.
  • This known device has the drawback that the mechanical contact between transducer and substrate may have an adverse effect on the conveying of the substrate and that the working surface of the transducer may become worn. Moreover, this known device has the drawback that owing to the minimal distance between transducer and substrate it is difficult to make the working area of adjacent transducers overlap correctly in the width direction of the substrate. A band of reduced ultrasonic action may be formed between two adjacent transducers. Particularly in the case of relatively wide substrates, many such interruption bands may be formed. It will be clear that this is undesirable.
  • the object of the invention is to provide a device for treating textile, in which these drawbacks are eliminated, and in particular to provide a compact treating device with which, at very short process times and minimum energy supply, textile substrates can be treated efficiently and satisfactory.
  • the device comprises a tank with a treatment liquid in which a vibration cavity is present which is delimited by a transducer and an interference element laying opposite the transducer.
  • the transducer and the interference element are designed to generate together an interference pattern of ultrasonic vibrations amplifying each other in the vibration cavity. Thereby a location of intensified vibration energy of the interference pattern occurs in a concentration area which lies in the vibration cavity at a distance from the transducer and from the interference element.
  • Conveyor means are provided for guiding a textile substrate to be treated free from the transducer and free from the interference element through the concentration area.
  • the energy coming from the ultrasonic vibrations is destined to dissipate by means of cavitation in the concentration area at the location of the textile substrate and thus to accelerate and improve the treatment of the textile substrate conveyed through the concentration area.
  • the pressure maxima and pressure minima occurring in the concentration area are able to lower the pressure in the liquid so strongly that vapour bubbles are formed far beneath the boiling point, which implode at a subsequent compression.
  • a brushing effect at the surface of the textile substrate to be treated and a so-called secondary flow in the yarns arises.
  • the process can be carried out at a lower process temperature and with a shorter process time.
  • the shorter process time makes it possible for the treating device to be of a compact design.
  • the concentration of the soundwaves in the concentration area makes it possible to convey the substrate at a certain distance from the transducer while nevertheless obtaining a sufficient intensity of the ultrasonic vibrations at the location of the substrate. Cavitation only has to take place in the concentration area, with the result that energy losses caused by cavitation elsewhere in the liquid can be limited. Moreover, in this case the working areas of the transducers will overlap one another more successfully.
  • the transducer together with the interference element is adapted to generate a standing wave in the vibration cavity, in which an antinode of the standing wave comes to lie in the concentration area.
  • the vibration frequency of the transducer must be adapted to the natural frequency of the vibration cavity, or the distance between the transducer and the interference element must be adapted to the ultrasonic vibration generated by the transducer.
  • the distance between the transducer and the interference element is such, for example equal to a half or whole wavelength, that only one antinode occurs in the vibration cavity.
  • the interference element is a fixed reflection element.
  • the ultrasonic longitudinal waves produced by the transducer shall as a result of reflection against the reflection element cause a back running wave, which together with the forward running wave may produce a standing or stationary wave.
  • the interference element is a second transducer, which is designed to generate ultrasonic vibrations with a vibration frequency which is substantially equal to the ultrasonic vibration generated by the first transducer.
  • a standing wave may occur, which is a superposition of two running waves with equal vibration frequency and amplitude, but opposite propagation direction.
  • the device 1 for treating textile which is illustrated diagrammatically, purely by way of example, in fig. 1, comprises a tank 2 for holding liquid 3. With the aid of rollers 4, a substrate 7 which is to be treated is conveyed through the tank 2 in the direction of the arrows T. An ultrasound unit 9 is attached to the tank 2, the interior of which unit is in open communication with the tank 2, so that liquid 3 is also present in the interior of the ultrasound unit 9.
  • a feedline 5 is arranged above the ultrasound unit 9, in such a manner that liquid 3 can flow into the inlet funnel (16 in fig. 2).
  • a discharge line 6 is arranged on that side of the tank 2 where the substrate 7 enters the tank. Due to the difference in height ⁇ H between the top side of (the inlet funnel 16 of) the ultrasound unit 9 and the discharge line 6, the liquid 3 is made to flow, specifically in the opposite direction to the conveying direction T of the substrate 7. It will be clear that a plurality of feed and/or discharge lines 5 and 6, respectively, may be provided and that these lines may be arranged one behind the other, in a transverse direction with respect to the plane of the drawing.
  • the ultrasound unit 9 comprises a number of ultrasonic transducers 8 and opposite interference elements 19, which are also formed by ultrasonic transducers here.
  • the transducers 8 and the interference elements 19 are disposed in such a manner that the ultrasonic energy which they generate is concentrated within a vibration cavity 13 at or in the vicinity of the substrate 7 by means of a suitable interference of ultrasonic vibrations amplifying each other.
  • the substrate 7 it is possible for the substrate 7 to be conveyed not directly along the transducers 8 but at a certain distance therefrom. This will be explained in more detail below with reference to fig. 2.
  • the ultrasound unit 9 is situated at the end of the conveying path of the substrate 7 through the treatment liquid, so that air which is attached to the substrate is as far as possible released to the liquid 3 before the substrate 7 reaches the vibration cavity 13.
  • the transducers 8 which lie on both sides of the substrate 7 may, for example, be actuated in phase in order to generate a standing wave.
  • the control unit 20 may comprise a microprocessor and may be designed in such a manner that the way in which the transducers are actuated can be varied by the user of the device 1.
  • Fig. 2 shows part of the ultrasound unit 9 of fig. 1 in more detail.
  • a vibration cavity 13 is situated inside the ultrasound unit 9.
  • the vibration cavity 13 which in operation is filled with liquid, is enclosed by concentration surfaces 12, which here form both focusing means 10 and the walls of the vibration cavity 13.
  • the vibration cavity 13 ends by merging into inlet and outlet funnels 16 and 17, respectively, which are delimited by guide surfaces 14 and 15, for the liquid 3.
  • the liquid 3 flows in a direction opposite to the direction T in which the substrate 7 is conveyed through the vibration cavity 13 in fig. 1.
  • the concentration surfaces 12 extend perpendicularly with respect to the plane of the drawing.
  • a plurality of transducers 8 are distributed in the longitudinal direction for each concentration surface 12, in order to be able to treat a substrate which is to be treated with ultrasound over its entire width.
  • the concentration surfaces 12 are straight, but obviously it is also possible to use curved concentration surfaces.
  • the substantially flat concentration surfaces 12 advantageously make it possible to use flat transducers, which can be produced more easily and more economically.
  • the effectiveness of the ultrasound unit 9 is enlarged because the several concentration surfaces 12 are flexibly connected to one another, for example by means of bellows 18. A further improvement can be achieved if each concentration surface 12 in the longitudinal direction at both sides is also provided with a flexible connection, for example by a pair of bends in the wall of the concentration surface 12. With this also the flexibility of the concentration surface 12 is enlarged.
  • a transducer 8 is positioned against each concentration surface 12, specifically in such a manner that (ultrasonic) energy generated by the transducer 8 reaches the vibration cavity 13 via the concentration surface 12.
  • the concentration surfaces are disposed in such a way with respect to one another that the ultrasonic energy which is generated by the transducers 8 is concentrated in a concentration area 11 which lies in the centre of the vibration cavity 13.
  • the centres of the concentration surfaces 12 are in each case situated at a radius R from a centre point M, and specifically the concentration surfaces on the right-hand side in fig. 2 are situated at a distance R from a first centre point M 1 , and the concentration surfaces on the left-hand side in fig.
  • concentration surfaces on the right-hand side form a first partial concentration area which is defined by the near and/or far field of the ultrasonic soundwaves and has a maximum intensity at a point which does not coincide with the centre of the vibration cavity 13 but nonetheless lies close to this centre.
  • concentration surfaces on the left-hand side form a second partial concentration area with a maximum intensity at a symmetrically opposite point.
  • a transducer is arranged on all the concentration surfaces 12, it will be clear that this is not necessary and that, by way of example, a transducer may be arranged on just one or two concentration surfaces. In this case, it is also possible for only the left-hand and/or only the right-hand half of the concentration surfaces illustrated to be provided with a transducer.
  • the transducers are preferably formed by piezoelectric transducers, although transducers of a different type, such as for example magneto-restrictive transducers, may also be used.
  • the transducers are designed to produce ultrasonic vibration frequencies at which cavitation will readily occur, preferably frequencies of between 16 kHz and 100 kHz.
  • the substrate 7 is guided through the vibration cavity 13 in the vertical direction.
  • the advantage of this is that in this way air bubbles can easily be discharged from the vibration cavity 13.
  • the configuration may be of modular design, so that the vibration cavity (13 in Figure 2) can in each case be expanded using a length of concentration surfaces and associated transducers.
  • the ultrasound unit in fig. 3 comprises four transducers 30 and four opposite interference elements 31 which together delimit a vibration cavity 32.
  • the vibration cavity 32 is filled with treatment liquid.
  • a textile substrate 33 conveyed through the vibration cavity 32 is shown in the figure with an interrupted line.
  • the transducers 30 each can be steered towards the generation of an ultrasonic vibration in the treatment liquid.
  • the transducers 30 are positioned straight beneath one another onto a wall plate 35.
  • the wall plate 35 passes the vibration to the liquid and at the same time protects the transducers 30 against corrosion by the liquid.
  • the propagation directions of the respective produced ultrasonic vibrations lie substantially parallel to each other in a direction perpendicular to the wall plate 35 and perpendicular to the conveying direction of the textile substrate 33.
  • the interference elements 31 lie face to face with the transducers 30 and provide for the reflection of the vibrations arriving there.
  • the interference elements are also positioned straight beneath one another at a wall plate 36.
  • the distance L between each transducer 30 and corresponding interference element 31 is substantially equal to a whole wavelength of the ultrasonic vibration generated by the transducer 30.
  • a standing wave pattern occurs, with antinodes at the location of the wall plates 35 and 36 and the middle of the vibration cavity 32.
  • the antinodes lying in the middle of the vibration cavity 32 of the several transducer interference element pairs together define an elongated concentration area 38 through which the textile substrate 33 is conveyed.
  • the imaginary concentration area 38 is substantially located at and nearby the textile substrate 33 and is diagrammatically shown with an interrupted line.
  • the pressure differences occurring in the concentration area are large enough for the formation of cavitation vapour bubbles at both sides of and in the textile substrate 33, which bubbles subsequently implode.
  • the cavitation causes local secondary flow, and accelerates and improves the treating process.
  • cavitation advantageously mostly occurs in the middle of the vibration cavity 32. Instead off a whole wavelength, the distance L can also be equal to a multiple thereof, the concentration area through which the substrate is conveyed, then optionally can be defined at the location of one or several of the occurring antinodes.
  • the interference elements 31 can be formed by fixed reflection elements which reflects waves running against it.
  • the interference elements 31 are, however, formed by transducers which are designed to generate ultrasonic vibrations with a vibration frequency which is substantially equal to the ultrasonic vibrations generated by the opposite transducers 30.
  • the two ultrasonic vibrations generated in opposite directions can amplify each other and produce an interference pattern with pressure maxima and pressure minima in the vibration cavity 32.
  • resonance may occur and a standing wave interference pattern may be achieved.
  • the distance between the transducers 30 and interference elements 31 is larger than 4 mm, and in particular larger than 10 mm. With such mutual distances the textile substrate can be conveyed with some play through the vibration cavity 32, without the risk that the substrate runs against one of the wall plates 35, 36.
  • transducers and interference elements placed behind one another, only one transducer and one opposite interference element may also suffice.
  • the arrangement with several transducers and interference elements has the advantage that, with a particular conveying speed, the substrate can be subjected to a longer process time.
  • fig. 4 an alternative embodiment of fig. 3 is shown, in which the transducers 40 are mounted with a centre plane onto a wall plate 41. This is the neutral plane of the transducer 40.
  • a foil 42 is placed before the frontside of the transducers 40.
  • the foil is as thin as possible, and for example 0,1 mm thick.
  • the foil is corrosion resistant foil, which is chemically resistant, but it may also be aluminium foil.
  • the foil 42 can vibrate freely, as a result of which, in the case of the occurrence of a standing wave interference pattern, a node may occur at the location of the foil 42.
  • the concentration area in which the first antinode lies lies at a quarter of a wavelength from the foil 42.
  • the distance M between each transducer 40 and opposite interference element 43 must at least be equal to half a wavelength or a multiple thereof.
  • the wall plates 35, 36 respectively 41 can be constructed segmented, in which the segments are connected to one another by means of flexible connection pieces.
  • a treating device in which efficient use is being made from interference patters of ultrasonic waves, in order to generate cavitation phenomena at a desired conveying location.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP99202091A 1998-06-30 1999-06-28 Dispositif et procédé pour le traitement des textiles Withdrawn EP0969131A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL1009525 1998-06-30
NL1009525A NL1009525C2 (nl) 1998-06-30 1998-06-30 Inrichting en werkwijze voor het veredelen van textiel.
NL1012194 1999-05-31
NL1012194 1999-05-31

Publications (1)

Publication Number Publication Date
EP0969131A1 true EP0969131A1 (fr) 2000-01-05

Family

ID=26642835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99202091A Withdrawn EP0969131A1 (fr) 1998-06-30 1999-06-28 Dispositif et procédé pour le traitement des textiles

Country Status (1)

Country Link
EP (1) EP0969131A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2430203A (en) * 2005-09-16 2007-03-21 Ten Cate Advanced Textiles Bv Apparatus for enzymatic and ultrasound treatment of textiles and method of treatment thereof
US7674300B2 (en) 2006-12-28 2010-03-09 Kimberly-Clark Worldwide, Inc. Process for dyeing a textile web
US7740666B2 (en) 2006-12-28 2010-06-22 Kimberly-Clark Worldwide, Inc. Process for dyeing a textile web
US8182552B2 (en) 2006-12-28 2012-05-22 Kimberly-Clark Worldwide, Inc. Process for dyeing a textile web
US8632613B2 (en) 2007-12-27 2014-01-21 Kimberly-Clark Worldwide, Inc. Process for applying one or more treatment agents to a textile web
WO2017025867A1 (fr) * 2015-08-08 2017-02-16 VYAS, Himalibahen K. Appareil destiné au traitement du textile, et procédé de fabrication
WO2021165121A1 (fr) * 2020-02-21 2021-08-26 Weber Ultrasonics AG Vibrateur de surface ultrasonore pour finition textile, dispositif de finition textile et procédé de finition textile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950725A (en) * 1958-03-26 1960-08-30 Detrex Chem Ind Ultrasonic cleaning apparatus
FR1562461A (fr) * 1967-04-17 1969-04-04
DE1810290A1 (de) * 1968-11-22 1970-06-04 Kaesler Klaus Peter Verfahren und Vorrichtung zur kontinuierlichen Reinigung und gegebenenfalls gleichzeitiger Veredlung von Textilien,synthetischer oder nativer Meterware
US3688527A (en) * 1970-07-13 1972-09-05 Stam Instr Apparatus for cleaning resilient webs
AT402076B (de) * 1995-03-09 1997-01-27 Mertinat Hans Dieter Verfahren und vorrichtung zur ultraschallbehandlung von textilgut

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950725A (en) * 1958-03-26 1960-08-30 Detrex Chem Ind Ultrasonic cleaning apparatus
FR1562461A (fr) * 1967-04-17 1969-04-04
DE1810290A1 (de) * 1968-11-22 1970-06-04 Kaesler Klaus Peter Verfahren und Vorrichtung zur kontinuierlichen Reinigung und gegebenenfalls gleichzeitiger Veredlung von Textilien,synthetischer oder nativer Meterware
US3688527A (en) * 1970-07-13 1972-09-05 Stam Instr Apparatus for cleaning resilient webs
AT402076B (de) * 1995-03-09 1997-01-27 Mertinat Hans Dieter Verfahren und vorrichtung zur ultraschallbehandlung von textilgut

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2430203A (en) * 2005-09-16 2007-03-21 Ten Cate Advanced Textiles Bv Apparatus for enzymatic and ultrasound treatment of textiles and method of treatment thereof
US7674300B2 (en) 2006-12-28 2010-03-09 Kimberly-Clark Worldwide, Inc. Process for dyeing a textile web
US7740666B2 (en) 2006-12-28 2010-06-22 Kimberly-Clark Worldwide, Inc. Process for dyeing a textile web
US8182552B2 (en) 2006-12-28 2012-05-22 Kimberly-Clark Worldwide, Inc. Process for dyeing a textile web
US8632613B2 (en) 2007-12-27 2014-01-21 Kimberly-Clark Worldwide, Inc. Process for applying one or more treatment agents to a textile web
WO2017025867A1 (fr) * 2015-08-08 2017-02-16 VYAS, Himalibahen K. Appareil destiné au traitement du textile, et procédé de fabrication
WO2021165121A1 (fr) * 2020-02-21 2021-08-26 Weber Ultrasonics AG Vibrateur de surface ultrasonore pour finition textile, dispositif de finition textile et procédé de finition textile

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