EP2113041B1 - Vorrichtung und verfahren zur herstellung einer matte aus faser- oder filamentbasis - Google Patents

Vorrichtung und verfahren zur herstellung einer matte aus faser- oder filamentbasis Download PDF

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Publication number
EP2113041B1
EP2113041B1 EP08761782A EP08761782A EP2113041B1 EP 2113041 B1 EP2113041 B1 EP 2113041B1 EP 08761782 A EP08761782 A EP 08761782A EP 08761782 A EP08761782 A EP 08761782A EP 2113041 B1 EP2113041 B1 EP 2113041B1
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EP
European Patent Office
Prior art keywords
transport member
projection
fluid
fibers
jet
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EP08761782A
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English (en)
French (fr)
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EP2113041A2 (de
Inventor
Frédéric NOELLE
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Andritz Perfojet SAS
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Andritz Perfojet SAS
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Publication of EP2113041A2 publication Critical patent/EP2113041A2/de
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet

Definitions

  • the present invention relates to a novel method of forming webs, sheets, webs or ribbons by spraying fibers for the production of nonwovens.
  • nonwovens there is already at least one method of forming sheets, webs or webs by spraying fibers.
  • airlay dry-forming technique to defibrate, by means of a rotating drum provided with fine teeth, a continuously fed sheet of fibers, and to project these fibers against another rotating drum or carpet to form a web or a veil of fibers.
  • This projection technique is for example marketed by the American company Rando under the brand Rando Webber.
  • Other machines more advanced and also using the principle of fiber projection by a drum lined with fine teeth, such as the Turbo Card of the German company Spinnbau or Air Web of the French company Thibeau are also proposed.
  • the new method of projection formation overcomes the disadvantages of known methods.
  • the same machine is suitable for all types of fibers, natural, artificial or synthetic fibers and artificial or synthetic continuous filaments. It allows, in a single jet, to project at the same time fibers of very different length, having an average length ratio of long fibers compared to short fibers of 10 or even 15 and more.
  • It is a universal jet spray method of forming web in terms of the type of fibers that can be used. It is also universal in terms of mass per square meter of sail or sheet formed, from less than 10 g / m2 to more than 500 g / m2, and this at high productivity, 300 kg / h and per meter of jet and more. It also makes it possible to form webs having ratios of the resistance in the machine direction to the resistance in the very wide transverse direction of 1 to 10 on the same machine.
  • the new training method first consists of dividing the process of forming a sheet, veil or sheet into two stages.
  • an assembly of fibers and / or filaments is held together so that it can be defibrated by a jet of liquid on a first conveying element through which fluid can pass.
  • the first step is to form a regular and unconsolidated layer, without melting points, fibers, or even more layers of fibers superimposed by one or more known forming techniques.
  • This may be for example one or more machines dry, wet or molten, such as for example cards, cards followed by lappers, cards followed by lappers and stretchers, paper-type head boxes, crates head to foam, spunbond towers and any other known training device.
  • the fiber web or layers deposited on the first transport element must be able to be defibrinated under the action of the jet. Tablecloths or leaves that have undergone strong consolidation should be avoided. Good results are obtained with webs or webs of fibers having a breaking length of less than 50 m. It is the free length for which is obtained the breaking of the sheet when it is subjected only to the action of its own weight.
  • the EDANA ERT 20.2-89 standard gives an accurate method for calculating the breaking length from the value measured with a dynamometer of the tensile strength of the sheet. However the use of a dynamometer is not always possible given the poor cohesion of some layers.
  • wet-laid sheets their breaking length is evaluated when they are impregnated with at least 300% water by weight.
  • the second step is to defibrate with a jet of fluid, preferably a water jet, the regular layer disposed on the first transport element, and at the same time as the defibering, to project with the same jet of fluid the fibers against a second transport element arranged facing the first transport element at the injection zone of the fluid jet at a distance greater than the thickness of the web.
  • the fibers are deposited on the surface of the second transport element in a regular layer.
  • the invention also relates to a production plant as described in claim 1 of a fiber-based web and / or filament, comprising a first endless transport element defining an interior space and through which fluid can pass, a device for projecting fluid jets onto the first transport element in the direction of a second transport element, characterized in that the distance from the first transport element to the jets projection point thereon and counted perpendicular to the first element at this point, the second transport element is greater than the thickness of the web, and the projection device is in the inner space.
  • the first transport element is preferably a woven conveyor, permeable to air, water and gases. And the jet of fluid is injected through the first transport element.
  • the first transport element is preferably a conveyor made of a synthetic or metallic fabric. It preferably has a permeability of between 100 and 1400 CFM, and preferably between 200 and 800 CFM. When it is a fabric, it consists of synthetic or metallic threads, 0.1 mm in diameter and preferably between 0.10 and 0.6 mm in diameter.
  • the fabric consists of 2 to 60 threads per cm in warp and weft direction, and preferably 10 to 40 threads per cm in in the warp and in the weft direction.
  • the fabric may be a single layer or multilayer fabric. In multilayer fabrics, generally two or three layer fabrics are found.
  • the first transport element may also be a thin microperforated metal or synthetic sheet, supported or not by a rigid and permeable structure such as a rotating drum.
  • a device for retaining a sheet of fibers for example by vacuum suction through a suction slot, is arranged in the interior space of the first transport element and immediately upstream of the fluid projection zone.
  • the device for retaining the fiber ply by vacuum suction disposed in the interior space of the first transport element and immediately upstream of the fluid projection zone.
  • the fluid projection zone preferably water jets
  • the suction zone downstream of the fluid projection zone no longer retains the fiber web, but only has the role of evacuating the water from the rebounds of the water jet on the first transport element.
  • the fiber retainer is disposed on the same side of the first conveying member as the fluid jet projecting device.
  • a fiber retainer is disposed on the same side of the first transport element that the device for projecting the jet of fluid, preferably water jets, and at the same time a suction device is disposed inside the second transport element to suck up most of the delivered water on the sheet by the water projection device. In the presence of suction inside the second transport element only bounces of the water jet can escape suction.
  • the fiber web retaining device may be made in a different manner, by mechanical means, in the form of a thin and flexible blade which plates the fibers against the first one. transport element immediately upstream of the jet device of the fluid jet.
  • a preferred way is to use the two devices for retaining the web, by air vacuum and by mechanical means to better press the sheet of fibers against the first transport element and immediately upstream of the jet projection device. fluid, in order to better defibrate it.
  • the blade which may be metal, stainless steel, nickel or plastic, is fixed directly to the frame in the vicinity of the point of projection of the water jet.
  • a mechanical compression device of the fiber web is disposed upstream of the jet point of the jet of fluid.
  • the device for mechanically compressing the web comprises means for wetting the web, for example an injector delivering jets of water.
  • the device for compressing and wetting the sheet is chosen from known devices and used for the production of non-woven fabrics consolidated by jets of water, such as those proposed by the company Rieter Perfojet - France.
  • the jet of fluid can be homogeneous over the entire useful width, as for example in the case of a thin blade of water, but it can also be generated by one or more rows of close jets, such as jets of water.
  • cylindrical water from an injector such as those used in the technique of consolidation by water jets and delivering from 100 to 5000 jets per meter, diameter of 50 to 1000 microns and preferably between 80 and 400 microns.
  • the water pressure is between 5 bars and 400 bars, and preferably between 10 bars and 250 bars.
  • the jet of fluid may also consist of divergent water jets, such as jets from jet nozzles. In this case, the jets intersect to ensure the continuity of the jet over the width of the machine.
  • the fluid jets or jets are preferably jets of liquid such as jets of water, it can also be jets of solvent, steam jets, jets of air or gas jets. It can also be a combination of different fluids.
  • the shape and the density of jets can also vary according to the transverse direction of the machine in number of jets, in diameter and in density of the jets, for example to form nonwovens having bands of appearance and of different structure in the machine direction.
  • the second transport element may be of the same type as the first or different.
  • This may for example be a rotating drum is covered with a metal or plastic fabric or covered with the micro-perforated sleeve and flat surface. It may be a drum presenting openings with or without a sub-canvas. It may also be a drum or carpet having geometric patterns in relief and / or hollow to produce patterned nonwovens or whose surface has areas of different shapes, relief and / or density.
  • the second transport element may be a microperforated drum whose surface is bristling with reliefs for producing nonwovens having openings or perforations in the direction of the thickness.
  • the first transport member is an endless belt made of a polyester yarn fabric
  • the second transport member is a rotating drum covered with a micro-perforated nickel sleeve such as those employed by the Company.
  • Rieter Perfojet for the production of nonwovens by entanglement by jets of water.
  • an aspirating device is disposed behind the second conveying element, at the level of the fiber receiving zone, for collecting and discharging the fluid from the jet of fluid which has projected the fibers onto the second transport element.
  • the suction is carried out inside the drum and the evacuation of the fluid is done from behind. The fluid can be filtered and recycled.
  • the speed of the second transport element may be greater than the speed of the first transport element. In this case, the mass per square meter of the nonwoven obtained will be less than that of the web or sheets superimposed on the first transport element.
  • the speed of the second transport element may be less than the speed of the first transport element, in this case the mass per square meter of the nonwoven obtained will be greater than the mass per square meter of the fibers present on the first transport element.
  • the speeds of the first and second transport elements may be identical.
  • the optionally adjustable speed of the first and second transport element is between 1 and 2000 m / min.
  • the ratio of the speed of the second transport element to the speed of first transport element is between 0.01 and 100 and preferably between 0.1 and 10.
  • the direction of movement of the fibers on the second transport element may be the same as on the first transport element or in the opposite direction.
  • a displacement in the opposite direction allows a reorientation of the fibers particularly interesting when one wants to obtain a good reorientation of the fibers in the transverse direction, starting with preferentially oriented fibers in the machine direction.
  • the displacement of the fibers on the second transport element may be in a direction not parallel to the first transport element.
  • the direction of movement of the second transport element may for example make an angle of 5 ° to 90 ° with the direction of movement of the first transport element.
  • the second transport element of the first device becomes the first transport element of the second device and a new jet of fluid is injected through the second transport element to project the fibers onto a third transport element.
  • the directions of movement may vary from the first to the second transport element, from the second to the third, and so on.
  • the directions of movement can also vary from one element to the next.
  • the distance between the first transport element and the second transport element depends on the thickness of the fiber web on the first transport element and the fluid used for the jet. It also depends on the power of the jet. In general, the greater the distance, the wider the area of removal of the fibers on the second transport element. The fiber mixture is improved by a large distance.
  • the distance from the first transport element to the second transport element at the point of injection of the fluid is generally between 2 and 500 mm, and preferably between 5 and 200 mm and more preferably between 20 and 100 mm.
  • the distance between the two movable elements is adjustable for example by a means of displacement of one relative to the other.
  • this layer or layers of continuous filaments can be previously consolidated by spot melting or by other methods, it can also be simply compacted with little cohesion, or can be deposited without cohesion at all. filaments being totally free. It can also be a non-woven spunbond or a composite with meltblown that has been treated with water jets to soften or perforate before the projection of other components on its surface and in its thickness.
  • the substrate can either be used as it is or undergo a complementary mechanical consolidation by means of jets of fluid. or by another mechanical process such as compression, needling, or by melting of one of the components by spot or smooth roll calendering, or by melting one of the components in a through-air oven, or by the addition of chemical binders.
  • This list of consolidation techniques is not limiting and all the consolidation techniques can be used either directly on the second transport element or downstream from it. It is also planned to perform finishing, coating, perforation, rolling with other non-woven after the formation of the non-woven and or consolidation.
  • the first injectors are preferably installed opposite the second transport element supporting the fibers, that is to say on him.
  • the jets have diameters between 80 and 200 microns and there are 500 to 5000 jets per meter of machine width.
  • the water pressure is between 20 and 400 bar, and preferably between 30 bar and 250 bar. If necessary, it is also planned to carry out additional consolidation steps of the same type or different.
  • the nonwoven may for example be dried in a through air oven and then calendered hot to confer resistance or aesthetic reasons. The drying is carried out at temperatures of preferably between 80 ° C. and 250 ° C.
  • FIGs 1 to 5 are diagrams of installations according to the invention.
  • a first transport element 1 is arranged facing a second transport element 2.
  • a fluid ejection device 3 in a jet is disposed behind the first transport element 1.
  • a suction device 4 is disposed behind the second element transport and facing the fluid ejection zone through the first transport element.
  • the non-consolidated sheet of fibers or filaments 5 originating from a not shown forming machine advances on the first transport element 1 and the fibers 6 constituting the web 5 are projected onto the surface of the second transport element 2 in the fluid ejection zone.
  • a new ply of fibers 8 is thus formed. It differs from the web 5 by the orientation of its fibers, possibly its mass per square meter if the speed of the first transport element differs from the speed of the second transport element. It also differs from the sheet 5 by the degree of mixing of its constituent fibers if there are several or if there were several constituent layers in the sheet 5.
  • the double arrow F symbolizes the means for moving the two elements 1 and 2 relative to each other so as to modify the distance between the upper strand of the element 1 and the lower strand of the element 2, which are opposite.
  • a web of fibers 9 advances on a first transport element 10. It is first compressed by a compression device 11 conveyor. Then it is wetted by an injector 12 delivering jets of water 13.
  • a device 14 consists of a suction box terminated by a slot 15 holds the fibers of the sheet 9 immediately before the fluid ejection device 16.
  • the fibers are projected by the jet of water 18 on the surface of a drum 19 covered a micro-perforated sleeve such as those used in the consolidation of nonwovens by jets of water.
  • a suction 20 disposed inside the drum 19 discharges a portion of the jet water.
  • Two injectors 21 delivering jets of water consolidate the nonwoven 22 by the known technique of consolidation by jets of water.
  • a suction roll 23 expresses a portion of the water contained in the nonwoven and then it is dried in a not shown through air oven.
  • the installation of the figure 1 is completed by the fact that it is provided on the upper run of the conveyor 2, which is permeable to a jet of water, a device 24 for projecting water jets which defibers the sheet 8 and projects the fibers 25, with using an aspirating device 26 on a conveyor 27.
  • the fibers form a new web 28.
  • the web 8 advances from the right to the left while at the same location and downstream from it on the conveyor 27, the web 28 advances from the left. to the right.
  • a fiber web 29 advances on a first transport element 30.
  • a device 31 for retaining the web on the first transport element holds the fibers of the web 29 immediately upstream of the waterjet projection device 32.
  • fibers are projected by the water jet 33 on the surface of a drum 34, covered with a micro-perforated sleeve such as those used in the consolidation of nonwovens by jets of water, in the form of a tablecloth 35.
  • a suction 36 disposed inside the drum 34 discharges most of the water from the jet 33. Bounces 37 of the water jet which remain after the suction 36, are discharged by the additional suction 38 downstream of the fluid projection zone and which prolongs the suction 31.
  • a ply of fibers 40 advances on a first transport element 41.
  • a device 42 for retaining the ply on the first transport element holds the fibers of the ply 40 immediately upstream of the fluid spraying device 43.
  • a thin and flexible blade 44 is used to press the fibers against the first transport element 41 immediately upstream of the device 43. are projected by the jet of water 45 on the surface of a drum 46 in the form of a sheet of fibers 47.
  • the suction 48 inside the drum 46 evacuates most of the water from the jet 45, except the rebounds 49 of the water jet, are evacuated by the additional suction 50 downstream of the water projection zone and which extends the suction 42.
  • the first transport member is an 800 CFM polyester permeability polyester fabric having 22 yarns per cm in a 0.25 mm diameter warp direction and having 17.5 yarns per cm in a 0 diameter weft direction. , 27 mm.
  • a fiber holding device is disposed under the first transport element and consists of a suction slot of width 10 mm and having an adjustable depression of -10 mbar to -80 mbar.
  • an injector delivers a single row of jets of water. There are 2000 jets of water per meter of machine width. The jets have a diameter of 120 microns.
  • the jets simultaneously defibrate and continuously project the fibers of the first transport element to the surface of a second transport element arranged facing the first transport element at the jet injection point which is also the projection point of the fibers.
  • the second transport element is a rotating drum covered with a sleeve microperforated with holes 300 microns in diameter and having 100 holes per cm2 of surface.
  • a vacuum of -80 mbar is applied inside the microperforated sleeve and over a width of 25 mm facing the projection zone of the fibers of the first transport element.
  • two water jet consolidation injectors of the same type as those used for the consolidation of nonwovens by the so-called Spunlace technique. They deliver 1666 jets per meter.
  • the jets have a diameter of 120 microns.
  • Suction slots in which a vacuum of -80 mbar is applied are arranged facing each injector inside the rotary drum.
  • Two sails of a mixture of 50% viscose fibers and 50% polyester fibers of 30 g / m 2 each are produced in line at 166 m / min with two conventional cards of the carding type for nonwovens with three combers .
  • the viscose fibers have a length of 40 mm and a pull of 1.7 dtex.
  • the polyester fibers have a length of 38 mm and a title of 1.7 dtex.
  • the two webs of 30 g / m2 are superimposed in a 60 g / m2 web and the web of 60 g / m2 is continuously deposited at a speed of 166 m / min on the first transport element. Depression in the holding device is -30 mbar.
  • the pressure in the projection injector is 30 bar.
  • the second transport element has a speed of 250 m / min.
  • the consolidation injectors on the second transport element have pressures of respectively 60 bar and 100 bar.
  • the nonwoven thus formed and consolidated is dried in a through-air oven at a temperature of 130 ° C. It is uniform and resistant. It has a mass per square meter of 40 g / m2. It was produced at 250 m / min. This is a speed 50% higher than the maximum speed that the same two cards can achieve with this mixture of fibers and a total mass per unit area of 40 g / m2 or 20 g / m2 per card.
  • Example 1 is repeated. Two carded veils of 15 g / m 2 each are produced. With an airlaid type machine, a layer of wood fibers of 3 mm average length and 35 g / m2 is deposited between the two carded webs of 15 g / m2. The three superposed layers of fibers are deposited at a speed of 100 m / min on the first transport element. The depression of the holding device is -40 mbar. The formation jet has a pressure of 30 bar. The speed of the second transport element is 100 m / min. The pressure of the injectors facing the second transport element and respectively 40 bar and 70 bar. The nonwoven thus formed and consolidated is dried in a through air oven at a temperature of 150 ° C.
  • the wood fibers are mixed with the fibers of the carded veils.
  • the nonwoven obtained has a mass per square meter of 63 g / m2. A small proportion of very short wood fibers was washed away by the water flow, which explains the loss of mass per square meter between the inlet and the outlet.
  • Example 2 is repeated with a speed of the second transport element of 160 m / min.
  • the nonwoven is uniform and resistant.
  • the wood fibers are mixed with the fibers of the carded veils.
  • the nonwoven obtained has a mass per square meter of 39 g / m2.
  • Example 2 is repeated with a speed of the second transport element of 40 m / min.
  • the nonwoven is uniform and resistant.
  • the wood fibers are mixed with the fibers of the carded veils.
  • the nonwoven obtained has a mass per square meter of 161 g / m2.
  • Example 2 is repeated replacing the upper carded web, that is to say the one that is above the wood fibers, with a web of 15 g / m 2 of continuous polypropylene filaments of 1.8 dtex resulting from a spunbond tower.
  • the nonwoven obtained is uniform and resistant.
  • the wood fibers were mixed with the fibers of the carded fleece as well as with the continuous filaments.
  • the nonwoven obtained has a mass per square meter of 63 g / m2.
  • Example 5 is repeated with a speed of the second transport element of 130 m / min.
  • the nonwoven is uniform and resistant.
  • the wood fibers were mixed with the fibers of the carded fleece as well as with the continuous filaments.
  • the nonwoven obtained has a mass per square meter of 48 g / m2.

Claims (14)

  1. Vorrichtung zur Herstellung einer Bahn auf Faser- und/oder Fädenbasis, mit
    - einem ersten endlosen Transportelement (1), wie einer Fördereinrichtung oder einer gewebten oder microperforierten Trommel, welches einen ersten Innenraum definiert und durch welches Fluid hindurch gelangen kann
    - eine Einrichtung (3) zur Projektion von Fluidstrahlen, wie Wasserstrahlen, auf das erste Transportelement (1) in Richtung eines zweiten Transportelements (2),
    dadurch gekennzeichnet, dass die Entfernung vom ersten Transportelement, an der Stelle der Projektion der Strahlen auf dieses und senkrecht gegenüber dem ersten Element an dieser Stelle betrachtet, zum zweiten Transportelement (2) größer ist als die Dicke der Bahn, und dass die Projektionseinrichtung (3) sich in dem Innenraum befindet.
  2. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine Einrichtung zum Zurückhalten einer Faserbahn auf dem ersten Transportelement, welche in Bezug auf die Verlagerungsrichtung des ersten Transportelementes stromauf von der Projektionseinrichtung sowie in dem Innenraum angeordnet ist.
  3. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine Einrichtung (31) zum Zurückhalten der Faserbahn, die durch eine zusätzliche Ansaugung (38) stromab von dem Bereich zur Projektion von Fluid verlängert ist, wobei der Bereich zur Projektion von Fluid mit umfasst ist, und wobei der Fluidstrahl (33) eine Abgrenzung zwischen den beiden Ansaugbereichen bildet.
  4. Vorrichtung nach einem der vorangehenden Ansprüche, gekennzeichnet durch mechanische Mittel (44) zum Zurückhalten der Faserbahn auf dem ersten Transportelement (40) unmittelbar stromauf von der Einrichtung zur Projektion von Fluidstrahlen (45), wobei die mechanischen Mittel (44) zum Zurückhalten der Faserbahn bevorzugt in Form einer dünnen und flexiblen Schneide vorliegen, um die Faserbahn (40) an das erste Transportelement (41) zu drücken.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch die Verwendung einer Einrichtung zum Zurückhalten der Faserbahn (40) auf dem ersten Transportelement (41) durch einen Ansaugbereich mittels Unterdruck (42) zur gleichen Zeit wie mechanische Mittel zum Zurückhalten der Bahn (44).
  6. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine Einrichtung zur mechanischen Kompression stromauf von der Projektionseinrichtung in Bezug auf die Verlagerungsrichtung des ersten Transportelementes, wobei die Kompressionseinrichtung bevorzugt ein Mittel zum Anfeuchten aufweist und die Projektionseinrichtung bevorzugt Strahlen in variabler Form und/oder eine variable Anzahl von Strahlen in Abhängigkeit der Stellen zur Projektion der Strahlen auf das erste Transportelement abgibt.
  7. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine Ansaugeinrichtung an den Projektionsstellen im Inneren des zweiten Transportelements.
  8. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine Einrichtung zum Zurückhalten der Faserbahn auf dem ersten Transportelement in dem Innenraum und einer Ansaugeinrichtung, welche im Inneren des zweiten Transportelements angeordnet ist.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch ein Mittel zum Regeln der Geschwindigkeit des zweiten Transportelements in Bezug auf jene des ersten in einem Verhältnis, welches zwischen 0,01 und 100, bevorzugt zwischen 0,1 und 10, liegt.
  10. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch ein Mittel zum Regeln der Entfernung zwischen den beiden Transportelementen.
  11. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch Mittel zum Verlagern des ersten und des zweiten Transportelements in dieselbe Richtung, in die entgegengesetzte Richtung oder in solcher Art, dass die Verlagerungsrichtungen einen Winkel zwischen sich bilden, welcher zwischen 5 und 90 Grad liegt.
  12. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zweite Transportelement so beschaffen ist, dass Fluid durch ihn hindurch gelangen kann, und dass ein drittes Transportelement sowie eine zweite Einrichtung zur Projektion von Fluidstrahlen vorgesehen sind, wobei das zweite Transportelement in der Richtung der Strahlen der zweiten Projektionseinrichtung betrachtet zwischen der zweiten Projektionseinrichtung und dem dritten Transportelement an der Stelle der Projektion der Strahlen auf das zweite Transportelement angeordnet ist.
  13. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Abstand zwischen dem ersten und dem zweiten Transportelement an der Strahlenprojektionsstelle zwischen 2 und 500 Millimetern liegt, bevorzugt zwischen 5 und 200 Millimetern und besser noch zwischen 20 und 100 Millimetern.
  14. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine Verfestigungseinrichtung auf dem zweiten Transportelement selbst, oder falls es ein drittes oder weiteres gibt, auf dem letzten Transportelement selbst, wobei die Verfestigungseinrichtung bevorzugt stromab vom zweiten oder, falls es mehrere gibt, vom letzten Transportelement vorgesehen ist.
EP08761782A 2007-01-19 2008-01-18 Vorrichtung und verfahren zur herstellung einer matte aus faser- oder filamentbasis Active EP2113041B1 (de)

Applications Claiming Priority (2)

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FR0700363A FR2911616B1 (fr) 2007-01-19 2007-01-19 Installation et procede de production d'une nappe a base de fibres ou de filaments
PCT/FR2008/000064 WO2008107549A2 (fr) 2007-01-19 2008-01-18 Installation et procede de production d'une nappe a base de fibres ou de filaments

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DE102013107237A1 (de) 2013-07-09 2015-01-15 TRüTZSCHLER GMBH & CO. KG Vorrichtung und Verfahren zum hydrodynamischen Verfestigen von Vliesen, Geweben und Gewirken

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DE102009016996A1 (de) 2009-04-08 2010-10-14 Fleissner Gmbh Vorrichtung zum Verfestigen einer Faserbahn
WO2010115400A1 (de) 2009-04-08 2010-10-14 Fleissner Gmbh Vorrichtung zum verfestigen einer faserbahn
DE102009017729A1 (de) 2009-04-11 2010-10-14 Fleissner Gmbh Vorrichtung zum Verfestigen einer Faserbahn
DE102015106490B3 (de) * 2015-04-28 2016-09-29 TRüTZSCHLER GMBH & CO. KG Anlage und Verfahren zur Verfestigung und Strukturierung von Fasern zu einem Vlies
DE102021107902A1 (de) * 2021-03-29 2022-09-29 Andritz Küsters Gmbh Anlage zur Verfestigung mindestens einer nass- oder trockengelegten Faserlage zu einer Vliesbahn, mit einem Förderer, der ein umlaufendes Band mit einem oberen Trum umfasst, auf welches die mindestens eine Faserlage ablegbar und in einer Produktionsrichtung verlagerbar ist

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CN101589186A (zh) 2009-11-25
DE602008005713D1 (de) 2011-05-05
ATE503050T1 (de) 2011-04-15
WO2008107549A2 (fr) 2008-09-12
FR2911616A1 (fr) 2008-07-25
WO2008107549A3 (fr) 2008-12-31
EP2113041A2 (de) 2009-11-04
FR2911616B1 (fr) 2009-07-03

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