EP1313899B1 - Appareil et procede de production de filaments - Google Patents

Appareil et procede de production de filaments Download PDF

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Publication number
EP1313899B1
EP1313899B1 EP00949790A EP00949790A EP1313899B1 EP 1313899 B1 EP1313899 B1 EP 1313899B1 EP 00949790 A EP00949790 A EP 00949790A EP 00949790 A EP00949790 A EP 00949790A EP 1313899 B1 EP1313899 B1 EP 1313899B1
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EP
European Patent Office
Prior art keywords
filaments
spinneret
shape
drawing device
spinneret plate
Prior art date
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Expired - Lifetime
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EP00949790A
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German (de)
English (en)
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EP1313899A1 (fr
Inventor
Philip Slack
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Autoconcept Ltd
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Autoconcept Ltd
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Classifications

    • 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
    • D04H3/105—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 needling
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D01D5/23—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool by asymmetrical cooling of filaments, threads, or the like, leaving the spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • 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
    • D04H3/16—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 thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • This invention relates to a method of and apparatus for producing fabrics of or including crimped polymeric filaments.
  • the filaments are of polypropylene.
  • this invention relates to the production of so-called "spun bonded" fabrics, which require a pre-determined resilience, as they are used in the manufacture of carpets or floor coverings, filters and wipes, and hygiene and healthcare textile products, and the like.
  • Spun bonded fabrics are also used to produce clothing products which are required to provide warmth to a wearer, and which are required to have good draping qualities and /or flexibility. In some other cases, the fabric has to provide good acoustic qualities.
  • spun bonded fabrics can be used in a wide variety and almost infinite number of applications.
  • the fabrics according to this invention can be used in any of these applications.
  • the filaments issuing from the spinneret orifices are drawn away at high speed traditionally by air jets spaced apart from the spinneret and typically incorporating a venturi nozzle for accelerating the air, and thus the filaments, which also pass through the venturi device, to the desired velocities.
  • This process is known as "draw down", and it is important to note that although air jets incorporating venturi nozzles are typically used, any high speed drawing device could be used, such as high speed rollers which could drag the filaments at high speed away from the spinneret orifices through which the filaments emerge.
  • the filaments are solidified by means of a wide, slow moving flow of air which may be directed from one or both sides of the filament.
  • the cross current of air provides a cooling air environment which solidifies the molten polymer constituting the filaments, and in general this cross-current of air extends from the spinneret plate to the drawing device to ensure the complete solidification of polymer.
  • this cooling of the filaments occurs over a vertical depth beneath the spinneret plate of between 2-4m and air flows through the vertically drawn filament bunch at a speed in the region of 0.5 m/s.
  • the spinneret has a large number of apertures and it is usual to use a plurality of spinnerets arranged relative to one another such that filament bundles issuing from each of the spinnerets overlap to such an extent that a uniform filament web results.
  • the drawing device deposits the cooled filaments onto a moving conveyor, for example in the form of a mesh screen.
  • the drawing device may be caused to oscillate which results in the laying down of a lapped mat of filaments on the conveyor.
  • the thickness of the filament mat may be controlled.
  • the denier of the filaments may be controlled by various means including controlling the rate at which the polymer is forced through the spinneret and the rate of drawing off of the filaments from the spinneret..
  • a number of methods are known to connect the randomly aligned filaments deposited on the conveyor into a stable textile-like fabric.
  • the mat of filaments is passed under pressure continuously between two or more calendar rolls.
  • the calendar rolls is heated and has an embossed surface pattern consisting of raised diamond shapes in staggered rows.
  • the filaments are not only connected, but the mat of filaments is compressed into a sheet material of thickness set by the gap, which is adjustable, between the calendar rolls.
  • the heated calendar roll with the embossed surface pattern co-operates against a cold calendar roller causing the filaments to be spot welded together at the pressure points created between the two calendar rollers creating the spun bonded fabric.
  • the second known method of connecting the filaments laid down on the conveyor is to pass the web of filaments through a barbed needle felting machine in order that the filaments in the web become entangled together such that they do not easily separate and thus define the spun bonded fabric.
  • spun bonded fabrics Uses to which spun bonded fabrics have been successfully put include: surgical dressings, cover stock material for babies disposable nappies, hygienic products, geotextile re-enforcing materials, surgical gowns and hospital operating theatre sheets, agricultural sun screen fabrics, motorway, landfill, and drainage liner fabrics, air filtration fabrics, and hygiene textile products in general.
  • the spun bonded fabric process as described hereinabove has reached a very advanced state of development, there are some serious disadvantages in the material produced by the known methods.
  • the materials lack the aesthetics of traditional woven or knitted textile materials such as drape, three dimensional flexibility, softness and resilience (springiness) .
  • they are often are stiff and in this respect they often have a flexibility feel similar to a sheet of thick cardboard, which has a limiting effect on the use of the spun bonded fabrics.
  • this invention seeks to provide a method and apparatus by which self crimp may be induced into the filaments, so that an improved spun bonded fabric will result.
  • the two polymers used obviously are required to have dissimilar properties, and by careful choice of the two polymers, a self-crimping filament may result.
  • a further disadvantage of this known method of producing self-crimped fibres is the very high up keep costs of the specialised apparatus required to form the filaments.
  • the air flow is at a rate in the order of between 3m/s and 30m/s, and most preferably between 3 and 10 m/s and the depth of the sheet is preferably less than 500mm, but this will to some extend depend upon the filament bundle being extruded and sheet depths of more than 500mm may be required.
  • the air knife is preferably disposed immediately below the exit face of the spinneret from which the filaments exit the apertures.
  • the air flow is of a depth of 50mm.
  • C-shape or substantial C-shape is meant any shape which has a majour peripheral portion between the ends of which is an inwardly directe mouth.
  • a square, rectangular or circular shape with a quadrant or any regular or irregular shape with a single portion removed to define a mouth would approximate a C-shape in accordance with this invention.
  • the at least one orifice comprises: a first portion having a first transverse cross-section defining a discontinuous loop, wherein the loop substantially surrounds a solid portion of a spinneret plate; and a second portion having a second transverse cross-section defining a continuous loop corresponding substantially the discontinuous loop of the first portion, wherein molten thermoplastic plastics material is passed in use through the at least one orifice in a direction from the first portion to the second portion.
  • fabrics of highly crimped, specifically helical three-dimensionally crimped filaments have been produced without having to resort to the use of bi-polymer filaments or additional mechanical treatments such as stretching or mechanical crimping.
  • the fabric has draping properties rather than being stiff, and is flexible.
  • the fabric has greater warmth through air entrapment within the crimped filament structure.
  • the loft, resiliency and springiness of the fabric is also be greatly improved.
  • the filaments must be drawn from the spinneret plate (where they are moving quite slowly) so as to reach a speed at least in the order of 400 metres per minute. Any less draw down results in little or no self crimping of the filaments.
  • the upper limit of draw down speed is a practical one in that if the speed of draw down is too high then the filaments simply break, which of course is unacceptable.
  • the method further comprises a step of heat setting the self-crimped filaments. This ensures that the helical crimp in the filaments is made substantially permanent.
  • the heat treatment takes place immediately after the spinning step, which is after the filaments have passed through the drawing device.
  • an air suction means disposed at the opposite side of the spinneret plate to that on which the air knife is disposed.
  • the addition of a suction means helps to maintain the uniformity of the air flow through the filaments and to restrict the depth of air flow to the depth of the air knife outlet from which the flow emerges. Additionally, the suction means assists in the drawing of the air through the filaments, and ensures that the velocity of air through the filaments does not decrease significantly.
  • apparatus for making spun bonded fabrics from or including filaments of polymeric material comprising
  • an apparatus for forming spun bonded fabric according to the invention is designated generally by the reference numeral 1.
  • the apparatus comprises an extruder 2 for extruding polymer which is introduced into the apparatus via hopper 3 and fed into the spinneret via filter 4, gear pump 5 and spin beam 6.
  • the extruded polymer is forced through apertures (also referred to herein as orifices) in the spinneret 7 and is then subject to a cross current of air in the form of a sheet of air flow produced by air knife 8.
  • the cross current of air provides a rapid cooling air environment.
  • an air suction means 8A for example in the form of a duct in which a vacuum is created, disposed at the opposite side of the spinneret plate to that on which the air knife is disposed.
  • the addition of a suction means helps to maintain the uniformity of the air flow through the filaments and to restrict the depth of air flow to the depth of the air knife outlet from which the flow emerges. Additionally, the suction means 8A assists in the drawing of the air through the filaments, and ensures that the velocity of air through the filaments does not decrease significantly.
  • the filaments issuing from the spinneret orifices are drawn away at high speed by a drawing device in the form of air jet 9 positioned some distance away from the spinneret.
  • the air jet 9 blows the cool filament onto a moving conveyor in the from of mesh belt 10 where the filaments 11 are collected.
  • the drawing speed is such that the filaments as they travel through the air jet 9 are moving at least at a speed of 400 metres per minute.
  • the filaments are deposited onto the moving mesh belt 10 in a randomly aligned mat or web 11.
  • the filaments are consolidated into a stable textile-like fabric by passing the randomly aligned web through two or more calendar rolls 12 which form a bonder.
  • One but preferably each of the calendar rolls is heated and has an embossed surface pattern.
  • the web of filaments 11 is compressed in thickness into a sheet material 13.
  • the thickness of the sheet material is related to the thickness of the mat entering the bonder and the bond area of the patterned roll and preferably the gap between the calendar rolls 12, 14 is fixed to maintain a fixed bonding pressure.
  • the mat, before it enters the bonder is preferably subjected to pre heating at station S to effect pre-shrink of the fibres if necessary.
  • the randomly aligned web of filaments 11 is consolidated by passing the web through a barbed needle felting machine 20 in order that the filaments 11 in the web become entangled together such that they do not easily separate and thus become useful as a textile-like material 22.
  • the filaments as they leave the air jet 9 show a propensity to self crimp to a high degree, and as a result the fabric 13 or 22 which results from the process, has excellent qualities of bulk, drape and flexibility, and is excellent for the various uses of spun bonded fabric as described herein.
  • FIG. 3 a typical orifice having a non-circular cross-section which comprises a full circular cross-section with one quarter of a circle removed is shown.
  • a spinneret with orifices with this shape is particularly effective in the method of the invention.
  • the air flow should be into the mouth M of the cross section of the filaments. This flow can be in the direction of middle of the mouth, but best results have been obtained by blowing the air into the edge of the mouth as indicated by arrows A, where the air flow is tangential to the face 33.
  • the filament is drawn down, so its cross sectional shape will change, and so it is best if the air flow is applied as soon after the filaments emerge from the spinneret plate as possible.
  • This particular orifice shape can be described in more general terms as having an arcuate peripheral portion 31 and two rectilinear portions 32, 33.
  • An orifice shape being a full circle would have a geometric centre at 34, but in the case of the orifice shape shown in Figure 3, the geometric centre will move to a position approximately at 35.
  • the rectilinear portions 32, 33 of the shape 30 therefore approach and recede from the geometric centre 35 in a particular angular sector defined by the dotted lines 36, 37.
  • the base angle ⁇ ° of this sector is 90°, but different angles may be selected.
  • the orifice cross section in any event approximates a C shape, and the invention requires that the orifice has a C shape or an approximate C-shape, again for reasons given below.
  • the C shape can be an exact shape as shown in Fig. 4 (a), or it may be of quite a different form to approximate a C shape as indicated in the other parts of Fig. 4. In each case, the approximate shape of the C is indicated by the dotted line X, and the mouth is indicated by the letter M.
  • the spinneret orifice extends through the spinneret plate at right angles to the plate exit face, but this is not necessary and the orifice could pass through the plate at an angle.
  • spun bonded fabric may be produced without being calendared or needled as described above.
  • a cross-lapping machine (not shown) may additionally be provided immediately after the air jets 9. Said machine oscillates laterally of a translating belt, such as the mesh belt 10 shown in the Figures and thus a web of gossamer-like crimped filaments may be laid on such a belt from side to side at a uniform thickness and subsequently needled, calendared or otherwise processed to connect the filaments into a fabric.
  • the spun bonded fabrics produced according to the invention can be effectively needled whereas the needling of filaments crimped by more conventional methods often results in the tearing and breakage of the filaments. This results from the improved resiliency and elasticity properties possessed by the self-crimping filaments.
  • the head and spinneret pointed in a downwards direction and was so arranged that a cross blowing blast of cooling air could play on the molten filaments as they emerged from the spinneret face.
  • the extruder was set with a temperature profile of 190-220°C and the spinneret and head were maintained at a temperature of 205°C.
  • Some distance away but directly in line with the spinneret was a suction device of the type sold on the UK market under the trade name "Airmover". By connecting a supply of high pressure compressed air to this device a venturi effect is created which enables the filaments issuing from the spinneret face to be sucked away at a high speed.
  • the spinning speed of the filaments could be adjusted.
  • a filament porcelain guide was positioned so that the filament bundle could be collected together and lead away to a precision filament take up winder which was situated nearby.
  • the take up winder was fitted with an askew filament advancing roller so that several wraps of the filament bundle could be taken around it to give a positive traction to the filaments.
  • the askew rollers were fitted with a tachometer calibrated in metres per minute so that the precise speed of spinning or draw off could be ascertained.
  • the charged extruder was started and molten filaments soon emerged from the face of the spinneret which was of the type that creates a stress differential across the diameter of the orifice.
  • the filaments were cooled by applying a stream of cooling air provided by a fan arrangement. The air was at a temperature of 14°C.
  • the cooling filaments were drawn away by the air mover and then passed via the ceramic thread guide to the askew rollers of the precision take up winder, maintained at a speed of 250 metres per minute and collected as a bundle.
  • the extruder was adjusted for output so that the final filaments had a denier of 5 per filament (9000 metres of a single filament weighed 5 grams).
  • the filaments which had not undergone any stretching or drawing process, other than melt draw down were unwound from the collecting bobbin of the winder and were measured in an Instron tensiometer and found to have a tenacity of 2.6 grams per denier with an elongation at break of 60%. Such filament properties are ideal for many textile applications. As the filaments were unwound from the collecting bobbin where they were under a high tension they were seen to have a straight appearance with no crimp present. However, within a few seconds of the winding tension being removed the filaments formed into tight helical crimps. A 90 metre hank of the 60 filament yarn was wound off the take up bobbin on a textile hank winder.
  • the arms of the hank winder swift were collapsed to allow the removal of the hank and immediately the filaments self crimped into a helical crimp formation. These crimped filaments were stressed by hand to virtually their breaking point and then the tension was released. The degree of crimp in the filaments increased and could not be removed by applying high tension. Next a group of filaments were stressed to breaking point but when the broken filaments were examined none of the crimps had been removed and were measured to have increased in frequency.
  • a further 90 metres length hank of filaments was prepared on the swift of the hank winder and removed. on removal, the filaments again reverted into a helical crimp formation. This hank of filaments was then placed in a hot air circulating oven maintained at a temperature of 130°C for a period of three minutes. on removal from the oven the helical crimp of the filaments had not been removed but was even more pronounced.
  • the length of the hank was again measured and found to be 80 metres i.e. the hank had shrunk in length by 10 metres due to the heat setting step.
  • Crimp percent of the heat set filaments was determined to be 60%.
  • Crimp % is defined as: [ ( Original Length of Tensioned Filaments ) - ( Length of Untensioned filaments ) ] ⁇ 100 Original Length of Tensioned filaments
  • No. 1 was repeated but instead of diverting the filament bundle by means of a ceramic thread guide to a take up winder as in experiment 1, the filament array issuing from the air mover was blown directly onto a sheet of perforated metal held 30 centimetres away from the discharge end of the Airmover Nozzle.
  • the perforations in the plate allowed the conveying air stream carrying the filaments to pass through the plate but the filaments were deposited on the surface of the perforated sheet.
  • the sheet of perforated metal was oscillated by hand and an even batt of filaments allowed to built up thereon. It was noticed that immediately the filament array was released from the discharge end of the Airmover they became un-tensioned and the filaments became very voluminous and spontaneously self crimped into a tight helical crimp formation.
  • a stream of heated air (130°C) was blown onto the filaments resting on the perforated plate to heat set the filaments and further develop the helical crimp.
  • the batt of highly crimped filaments was a very suitable material to convert into a textile product either by needling with felting needles, or by consolidating by means of an embossed heated calendar rolls.
  • Example No. 1 was repeated, but the spinneret plate in the extruder was changed for one in which the orifices were arranged to pass through the spinneret plate and an angle, in this case at 45 degees.
  • This spinneret plate had the same number of holes and shape as that shown in Fig 3 with the except that the holes were drilled at an angle of 45° to the exit surface of the spinneret.
  • Example No. 1 was again repeated in all respects with the exception that the polypropylene resin was changed to a grade type XS 6500 made by Montell. This grade is narrow molecular weight distribution polymer with a melt flow index of 35. The resulting filaments crimped spontaneously on become tensionless after exiting from the Airmover used to draw the filaments away from the spinneret.
  • Example No. 1 was again repeated in all respects with the exception that the polypropylene resin was changed to a grade type VS 6100 made by Montell. This grade is a narrow molecular weight distribution polymer with a melt flow index of 25.
  • the helical crimp further increased and was of a permanent nature which could only be removed by heat setting under high tension at a temperature which was substantially higher than the 130°C used to heat set the crimps into the filaments.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Inorganic Fibers (AREA)

Claims (10)

  1. Procédé de fabrication de tissus non tissés à partir de filaments (11) réalisés en une matière polymérique ou incluant de tels filaments, le procédé comprenant les étapes consistant à
    a) extruder (2) le polymère en fusion hors d'ouvertures prévues dans une filière pour produire des filaments
    b) étirer les filaments hors de la filière au moyen d'un dispositif d'étirage (9)
    c) souffler un débit d'air de refroidissement sous forme d'une nappe à partir d'une lame d'air transversale relativement aux filaments (11) pendant leur passage entre la filière et le dispositif d'étirage
    d) déposer les filaments, au fur et à mesure qu'ils émergent du dispositif d'étirage, sur une bande transporteuse (10) pour former un mat de filaments (11), et
    e) traiter le mat pour connecter ensemble les filaments individuels afin de former un tissu, caractérisé en ce que (i) les filaments sont étirés hors de la filière de sorte que, au niveau du dispositif d'étirage, les filaments (11) se déplacent à une vitesse minimum de 400 mètres/minute, (ii) les ouvertures de la filière ont une coupe transversale qui a la forme d'un C ou est proche de cette forme afin d'extruder, au niveau de la filière, des filaments (11) de la même forme de coupe transversale et, (iii) le débit d'air de refroidissement est dirigé vers l'embouchure ouverte de la forme en C de la coupe transversale du filament.
  2. Procédé selon la revendication 1, selon lequel la vitesse du débit d'air est comprise entre 3 et 30 mètres/seconde environ.
  3. Procédé selon la revendication 1 ou 2, selon lequel la nappe d'air a une profondeur de 10 à 75 mm.
  4. Procédé selon la revendication 1, 2 ou 3, selon lequel les ouvertures prévues dans la filière ont une forme transversale qui consiste en un cercle dont un quart a été enlevé.
  5. Procédé selon l'une quelconque des revendications précédentes, selon lequel le débit d'air de refroidissement est dirigé vers un côté de l'embouchure ouverte de la forme en C de la coupe transversale du filament.
  6. Procédé selon l'une quelconque des revendications précédentes, selon lequel la connexion des filaments (11) inclut une application de chaleur.
  7. Procédé selon l'une quelconque des revendications précédentes, selon lequel la connexion des filaments (11) comprend un traitement mécanique.
  8. Procédé selon la revendication 7, selon lequel le traitement mécanique comprend l'aiguilletage.
  9. Procédé selon l'une quelconque des revendications précédentes, qui comprend une étape de préchauffage des fibres entre les étapes d'étirage des filaments (11) et l'exécution du traitement des filaments pour former le tissu.
  10. Dispositif de fabrication de tissus non tissés à partir de filaments réalisés en une matière polymérique ou incluant de tels filaments, comprenant
    a) une filière pour extruder le polymère en fusion hors des ouvertures prévues dans la filière afin de produire des filaments
    b) un dispositif (9) agencé de sorte à étirer les filaments hors de la filière
    c) une lame d'air (8) agencée de sorte à souffler un débit d'air de refroidissement sous forme d'une nappe transversale relativement aux filaments (11), lorsqu'ils passent de la filière au dispositif d'étirage (9)
    d) une bande transporteuse (10) agencée de sorte à ce que les filaments (11) soient déposés sur la bande au fur et à mesure qu'ils émergent hors du dispositif d'étirage (9) pour former un mat de filaments (11) sur la bande transporteuse (10), et
    e) des moyens pour traiter le mat afin de connecter ensemble les filaments individuels pour former un tissu, caractérisé en ce que
    f) (i) le dispositif d'étirage (9) est agencé de sorte à ce que les filaments se déplacent à une vitesse minimum de 400 mètres/minute au niveau du dispositif d'étirage (9), (ii) les ouvertures prévues dans la filière ont une coupe transversale qui consiste en une forme en C ou est proche de cette forme pour extruder, au niveau de la filière, des filaments de la même forme de coupe transversale et (iii) la lame d'air est agencée de sorte à diriger le débit d'air de refroidissement vers l'embouchure ouverte de la forme en C de la coupe transversale du filament.
EP00949790A 1999-08-05 2000-08-03 Appareil et procede de production de filaments Expired - Lifetime EP1313899B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9918376.6A GB9918376D0 (en) 1999-08-05 1999-08-05 Filament production method
GB9918376 1999-08-05
PCT/GB2000/002998 WO2001011119A1 (fr) 1999-08-05 2000-08-03 Appareil et procede de production de filaments

Publications (2)

Publication Number Publication Date
EP1313899A1 EP1313899A1 (fr) 2003-05-28
EP1313899B1 true EP1313899B1 (fr) 2006-05-03

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EP00949790A Expired - Lifetime EP1313899B1 (fr) 1999-08-05 2000-08-03 Appareil et procede de production de filaments

Country Status (6)

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EP (1) EP1313899B1 (fr)
AT (1) ATE325208T1 (fr)
AU (1) AU6305800A (fr)
DE (1) DE60027790D1 (fr)
GB (1) GB9918376D0 (fr)
WO (1) WO2001011119A1 (fr)

Cited By (1)

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JP5241925B2 (ja) 2009-10-16 2013-07-17 三菱電機株式会社 真空断熱材の芯材の製造装置及び真空断熱材の製造方法及び真空断熱材及び冷蔵庫及び機器
WO2011048824A1 (fr) 2009-10-19 2011-04-28 三菱電機株式会社 Matériau d'isolation par le vide, boîtier d'isolation thermique, réfrigérateur, dispositif de congélation/climatisation, dispositif d'alimentation en eau chaude, appareil, et procédé de fabrication de matériau d'isolation par le vide
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EP1313899A1 (fr) 2003-05-28
ATE325208T1 (de) 2006-06-15

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