EP0772705A1 - Apparatus for producing fluid jet-bonded non-woven webs - Google Patents

Apparatus for producing fluid jet-bonded non-woven webs

Info

Publication number
EP0772705A1
EP0772705A1 EP96904126A EP96904126A EP0772705A1 EP 0772705 A1 EP0772705 A1 EP 0772705A1 EP 96904126 A EP96904126 A EP 96904126A EP 96904126 A EP96904126 A EP 96904126A EP 0772705 A1 EP0772705 A1 EP 0772705A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
jets
sheet
treatment
water
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.)
Granted
Application number
EP96904126A
Other languages
German (de)
French (fr)
Other versions
EP0772705B1 (en
Inventor
Andre Vuillaume
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.)
ICBT Perfojet SA
Original Assignee
ICBT Perfojet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ICBT Perfojet SA filed Critical ICBT Perfojet SA
Priority to DE29623007U priority Critical patent/DE29623007U1/en
Publication of EP0772705A1 publication Critical patent/EP0772705A1/en
Application granted granted Critical
Publication of EP0772705B1 publication Critical patent/EP0772705B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets

Definitions

  • the present invention relates to an improvement made to installations allowing the production of non-woven fibrous webs, the cohesion of which is obtained by intermingling of fibers in the thickness of said web thanks to the action of jets of fluid, and more particularly of jets of pressurized water.
  • the installations proposed to date for carrying out a treatment on both sides of the basic product are of the type described in US Pat. No. 3,508,308 (see in particular FIGS. 7 and 8 and corresponding description ), and are designed so that the basic fibrous structure passes through a succession of actual interlacing zones each consisting of a rotary perforated cylinder associated with a plurality of injectors (three successive ramps for each rotary cylinder in the example illustrated) which make it possible to act first against one of the faces of the product, then, by means of detour provided between two successive cylinders, to act then on the reverse side and, possibly , to carry out a third treatment on the right side before drying and receiving the product produced.
  • the successive ramps are adjusted to different pressures depending on the articles to be produced, pressure generally between 30 and 100 bars or more.
  • the installation according to the invention also makes it possible to treat fibrous webs of a higher grammage than conventional installations where a series of successive interlacing treatments is carried out on each of the faces of the article.
  • fibrous webs have a weight greater than 100 g / m2, and in particular when they are made of low denier fibers, it has been observed that surface appearance defects are produced (raised and recessed areas) which makes them unsuitable for most applications.
  • the installation according to the invention comprises, in a known manner, means making it possible to compress, and introduce a fibrous sheet inside a treatment zone in which the moving sheet is subjected to the action of a succession of ramps of pressurized water jets which act alternately against the two faces of said sheet, said installation being characterized in that the interleaving means consist of at least one series of perforated cylinders , each cylinder being associated with a ramp (or injector) projecting jets of water under pressure against the surface of said sheet, said ramps being staggered from one treatment cylinder to the next, the jets acting perpendicularly against the surface of the processed product and the peripheral speed of the cylinders increasing slightly from one treatment cylinder to the next.
  • the installation comprises four superposed treatment rollers each associated with a ramp projecting jets of water under pressure against the surface of the material, the first cylinder if we consider the cycle of production- being associated with means making it possible to ensure a densification of the untreated basic fibrous web.
  • Such means for ensuring densification consist essentially of a porous endless conveyor belt which supports the material and which is in tangential abutment against the surface of the first rotary perforated cylinder inside which a partial vacuum is applied and which allows therefore compressing the base ply before it is subjected to the action of the first ramp of pressurized jets; in this embodiment, when the base ply is compressed between the conveyor belt and the rotary perforated cylinder, the said ply is wetted by means of a curtain of water, produced by means of an additional ramp disposed inside the volume defined by the conveyor belt, which is directed against the surface of the latter and which passes successively through said porous belt, the compressed sheet before being sucked through the perforated cylinder.
  • FIG. 2 is a detailed perspective view showing the structure of an elementary interlacing treatment area that includes such a machine.
  • the installation according to the invention comprises, if one follows the direction of production of the article, means designated by the general reference (1) which allow to produce, compress and introduce a fibrous web (2) inside a treatment zone proper designated by the general reference (3), zone in which the moving web (2) is subjected to the action of '' a succession of ramps of pressurized water jets, ramps designated by the same reference (R) assigned an index and which act alternately against the two faces (N) and (S) of said ply (2), ply which, after treatment, is taken up by an evacuation assembly, designated by the general reference (4) where additional treatment may possibly be applied to it.
  • the general reference (1) which allow to produce, compress and introduce a fibrous web (2) inside a treatment zone proper designated by the general reference (3), zone in which the moving web (2) is subjected to the action of '' a succession of ramps of pressurized water jets, ramps designated by the same reference (R) assigned an index and which act alternately against the two faces (N) and (S) of said ply
  • each cylinder being associated with a manifold of injectors (R1, R2, R3, R4) projecting jets of water under pressure against the surface of the sheet (2), said ramps being staggered from one treatment roller to the next and the jets acting perpendicularly against the surface of the product to be treated.
  • the peripheral speed of the cylinders (C1, C2, C3, C4) is adjusted so that it gradually increases from one cylinder to the next in order to ensure the tensioning of the sheet during the various phases of the treatment.
  • a second series of perforated cylinders (C5, C6, C7) associated with ramps (R5, R6, R7) is arranged in parallel and facing the first series.
  • This second series of ramps is not essential and possibly, it could be envisaged to receive the treated product immediately at the exit of the last interlacing treatment zone formed by the cylinder (C4) and the ramp (R4).
  • Each treatment assembly (C) and ramp (R) has a structure as illustrated in FIG. 2.
  • the perforated cylinder (C) consists of a cylinder, preferably of stainless steel, having a diameter between 200 mm and 1000 mm, and is rotated by any suitable means so as to have a peripheral speed equal to the speed d entry of the material (2) into the installation. In general, this speed is between 10 m / min and 200m / min and the increase in speed from one cylinder to the next is of the order of 0.5 to 3%.
  • the perforations (10) that the cylinder comprises are cylindrical or honeycomb, said cylinder advantageously being covered with a fabric of steel or plastic monofilament or of a perforated sheet having a porosity of between 3 and 20% (element not shown in Figure 2).
  • the ramp or injector (R) which is arranged parallel to a generator of the cylinder (C) is a conventional ramp making it possible to create jets or needles of water (11) with a usual pressure of at least 30 bars, sometimes more, so as to cause the elementary fibers of the web (2) to become entangled.
  • Such an injector can be designed in a similar manner to the teachings of 1 ⁇ P-A-0-400 249.
  • a suction box (12) Inside the cylinder (C), there is a suction box (12), fixed, coaxial with the rotary cylinder (C), connected to a suction source making it possible to create a partial vacuum inside the latter.
  • This fixed suction box (12) has in the alignment of the water jets (11) a slot (13) of about 10 mm in width allowing the suction of the water which passes through the fibrous web and the perforated cylinder (10). .
  • the cylinder (Cl) of the first processing assembly is designed not only to allow the interlacing operation as explained above, but also to cooperate in the compression of the ply ( 2) untreated before it is subjected to interlacing treatment.
  • the cylinder (Cl) has a diameter which preferably is greater than the diameter of the other cylinders of the installation, and which is advantageously between 500 mm and 1000 mm.
  • This cylinder is in abutment against an endless porous conveyor belt (14), which allows the introduction of the sheet inside the treatment zone.
  • This porous support has a speed synchronized with that of the cylinder. It therefore makes it possible to achieve compression of the ply (1) between the surface of the cylinder (Cl) and its own surface before it is subjected to the action of the first ramp of high pressure jets (RI). It was found that it was advantageous during this operation of compressing the sheet, to make a wetting of the latter.
  • a ramp (15) creating a curtain of water under slight pressure acting through the porous support assembly (14) / compressed sheet (2) and perforated cylinder (1).
  • a second slot (16) is provided on the fixed suction box (12), and this opposite the water ramp.
  • This discharge slot has a width of between 10 and 20 mm.
  • This mooring ramp (15) forms a continuous curtain of water under slight pressure and is arranged opposite the porous support fabric (14) at a distance between 10 and 100 mm from said porous support.
  • the water pressure from these jets is between 3 and 15 bars, and preferably close to 3 to 8 bars. Below 3 bars, the curtain disperses too quickly and beyond 15 bars, the additional cost is not justified. It is important that the curtain of water from this first ramp acts perpendicularly to the moving base sheet which advances and compresses so as to wet it under optimal conditions.
  • the dried sheet (2) is received in a conventional manner at (4), for example by means of an endless conveyor belt (17).
  • the sheet (2) can undergo an additional treatment, for example a treatment making it possible to produce perforated patterns in the sheet by means of an assembly (16) of the type described in European patent 0400249.
  • a nonwoven web (2) based on polyester fibers is introduced having a titer of 3.3 dtex and a length of 38 mm, weighing 200 g / m2 and the thickness of which is 8 cm.
  • the speed of introduction of the sheet is 20 m / min.
  • This sheet is brought to the zone proper (3) by passing over a conveyor belt (14) having a porosity of 46%.
  • the sheet is compressed between the first rotary cylinder (13) and said conveyor belt and subjected to the action of a curtain of water produced by the ramp (15), the outlet of which is at a distance of 100 mm from the internal surface. of the conveyor belt (14).
  • the pressure of the water coming from the ramp (15) is adjusted to 10 bars.
  • the compressed sheet is then subjected to the action of the water jets from the ramps (R1, R2, R3, R4) which act alternately on the faces (N) and (S) of said sheet.
  • the four ramps (R1-R4) all produce 1250 jets per meter and are adjusted as follows.
  • Such a sheet has a very regular surface condition, identical on both sides, and has the following mechanical characteristics measured on a sample 50 mm wide:
  • the article treated under these conditions has similar mechanical characteristics, but it is found that a portion of the fibers redirected during treatment on the N side appear on the second side S which has a fluffy and not regular appearance.
  • the flatness of the article is less good than that of the article produced on a machine according to the invention.
  • the energy consumption necessary for binding is, in a machine produced in accordance with the invention, of the order of 0.65 Kwh per kilogram of nonwoven, while it amounts to 0.94 Kwh in the case of a conventional installation.
  • the installation according to the invention involves as many cylinders as treatment ramps, the latter however proving to be of a lower cost since for the production of similar articles, it requires a lower number of treatment ramps, lower water consumption with an energy saving of almost 50%, and this to obtain a better final result .
  • the invention is not limited to the embodiment described and illustrated, but covers all the variants produced in the same spirit, in particular those which would include perforated cylinders arranged parallel to each other provided that the ramps projecting the water jets act alternately against the two faces of the treated fibrous web and that the peripheral speed of the cylinders gradually increases from one treatment zone to the next.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

PCT No. PCT/FR96/00227 Sec. 371 Date Mar. 5, 1997 Sec. 102(e) Date Mar. 5, 1997 PCT Filed Feb. 13, 1996 PCT Pub. No. WO96/27040 PCT Pub. Date Sep. 6, 1996Apparatus for the production of a nonwoven material wherein a web of material is drawn over a series of parallelly aligned porous rolls. The web is treated with a jet of pressurized water as it moves in contact over each roll. The web is compressed between the first roll in the series and is wetted by a curtain of water as it is being compressed to increase the density of the web material prior to its being treated with the pressurized jets of water.

Description

INSTALLATION POUR LA REALISATION DE NAPPES NON TISSEES DONT LA COHESION EST OBTENUE PAR L'ACTION DE TETS DE FLUIDE. INSTALLATION FOR THE PRODUCTION OF NONWOVEN TABLECLOTHS WHICH COHESION IS OBTAINED BY THE ACTION OF TETS OF FLUID.
La présente invention concerne un perfectionnement apporté aux installations permettant la réalisation de nappes fibreuses non tissées, dont la cohésion est obtenue par entremêlement des fibres dans l'épaisseur de ladite nappe grâce à l'action de jets de fluide, et plus particulièrement de jets d'eau sous pression.The present invention relates to an improvement made to installations allowing the production of non-woven fibrous webs, the cohesion of which is obtained by intermingling of fibers in the thickness of said web thanks to the action of jets of fluid, and more particularly of jets of pressurized water.
Il a été proposé depuis fort longtemps, ainsi que cela ressort de l'US -A-3 214 819 et de l'US-A-3 508 308, de réaliser des nappes textiles non tissées dans lesquelles la cohésion est donnée par l'entrelacement des fibres élémentaires entre elles, entrelacement obtenu par l'action de jets d'eau sous pression qui agissent sur la structure fibreuse à la manière d'aiguilles et permettent de réorienter une partie des fibres constituant la nappe dans le sens de l'épaisseur.It has been proposed for a very long time, as is apparent from US Pat. No. 3,214,819 and US Pat. No. 3,508,308, to produce nonwoven textile webs in which cohesion is given by interlacing of the elementary fibers therebetween, interlacing obtained by the action of pressurized water jets which act on the fibrous structure in the manner of needles and make it possible to redirect a part of the fibers constituting the sheet in the thickness direction .
Une telle technologie s'est largement développée de nos jours et est utilisée non seulement pour réaliser des étoffes non tissées à usage textile, tel que notamment pour les applications dans des domaines médicaux ou hospitaliers, de l'essuyage, de la filtration, d'enveloppes pour sachets de thé..., mais également pour réaliser de minuscules perforations dans des supports continus, tels que papiers, cartons, films, voire même feuille de matière plastique ou autres, les articles obtenus pouvant éventuellement présenter des motifs en creux ou en relief comme cela ressort notamment du FR-A-2 068 676, FR-A-2 536 432, EP-A -0400 249. Ainsi que cela ressort de l'US-A-3 214 819 qui, à la connaissance du Demandeur, est le brevet de base sur une telle technologie, l'action des jets d'eau peut s'exercer de différentes manières contre l'article que l'on traite, soit par exemple contre une seule de ses faces, soit successivement contre les deux faces. Les enseignements apportés par ce document sont cependant essentiellement théoriques et les indications données concernant les conditions pratiques de traitement ne permettent pas une production industrielle satisfaisante. Ainsi, lorsqu'il est envisagé de réaliser un liage en agissant alternativement contre les deux faces, l'une des phases du traitement se fait au travers de la toile supportant le voile fibreux. Une telle manière de procéder entraîne une très forte absorption d'énergie des jets d'eau par la toile support lorsque celle-ci s'oppose au passage desdits jets ainsi qu'un décollement de la structure fibreuse de la surface de ladite toile support, les jets repoussant la structure fibreuse, entraînant un allongement de cette dernière et la formation de plis.Such technology has been widely developed these days and is used not only for making nonwoven fabrics for textile use, such as in particular for applications in the medical or hospital fields, wiping, filtration, envelopes for tea bags ..., but also for making tiny perforations in continuous supports, such as paper, cardboard, films, or even sheet of plastic or other material, the articles obtained possibly having hollow patterns or in relief as shown in particular from FR-A-2 068 676, FR-A-2 536 432, EP-A -0400 249. As is apparent from US-A-3,214,819 which, to the knowledge of the Applicant, is the basic patent on such technology, the action of water jets can be exerted in different ways against article which one treats, either for example against only one of its faces, or successively against the two faces. The lessons brought by this document are however essentially theoretical and the indications given concerning the practical conditions of treatment do not allow a satisfactory industrial production. Thus, when it is envisaged to carry out a binding by acting alternately against the two faces, one of the phases of the treatment is done through the fabric supporting the fibrous web. Such a procedure results in very high energy absorption of the water jets by the support fabric when the latter opposes the passage of said jets as well as a separation of the fibrous structure from the surface of said support fabric, the jets repelling the fibrous structure, resulting in an elongation of the latter and the formation of folds.
Compte-tenu de ces inconvénients, les installations proposées à ce jour pour réaliser un traitement sur les deux faces du produit de base, sont du type décrit dant l'US-A-3 508 308 (voir notamment figures 7 et 8 et description correspondante), et sont conçues de manière à ce que la structure fibreuse de base passe au travers d'une succession de zones d'entrelaçage proprement dites constituées chacune d'un cylindre perforé rotatif associé à une pluralité d'injecteurs (trois rampes successives pour chaque cylindre rotatif dans l'exemple illustré) qui permettent d'agir tout d'abord contre l'une des faces du produit, puis, grâce à des moyens de détour prévus entre deux cylindres successifs, à agir ensuite sur la face envers et, éventuellement, à effectuer un troisième traitement sur la face endroit avant de sécher et réceptionner le produit réalisé. En général, les rampes successives sont réglées à des pressions différentes en fonction des articles à produire, pression en général comprise entre 30 et 100 bars ou plus.In view of these drawbacks, the installations proposed to date for carrying out a treatment on both sides of the basic product are of the type described in US Pat. No. 3,508,308 (see in particular FIGS. 7 and 8 and corresponding description ), and are designed so that the basic fibrous structure passes through a succession of actual interlacing zones each consisting of a rotary perforated cylinder associated with a plurality of injectors (three successive ramps for each rotary cylinder in the example illustrated) which make it possible to act first against one of the faces of the product, then, by means of detour provided between two successive cylinders, to act then on the reverse side and, possibly , to carry out a third treatment on the right side before drying and receiving the product produced. In general, the successive ramps are adjusted to different pressures depending on the articles to be produced, pressure generally between 30 and 100 bars or more.
De telles installations qui donnent satisfaction d'un point de vue pratique, présentent cependant un certain nombre d'inconvénients parmi lesquels on peut citer :Such installations which give satisfaction from a practical point of view, however have a certain number of drawbacks among which we can cite:
- un encombrement en longueur important,- a large overall length,
- et surtout, la nécessité d'effectuer la première série de traitements d'entrelaçage sur une face avec une pression réduite pour éviter que les fibres ne ressortent sur l'autre face et créent des défauts ; en effet, si la pression est élevée, les fibres de la face non liée ont tendance à pénétrer dans la toile support du premier cylindre ; il est donc nécessaire, pour compenser la moindre efficacité de liage résultant de cette pression réduite, d'augmenter le nombre de rampes de traitement (désignées couramment par l'expression "injecteurs"), ce qui augmente notablement le coût de l'installation, complique la mise en oeuvre industrielle et entraîne une dépense d'énergie et de consommation en eau élevée.- and above all, the need to carry out the first series of interlacing treatments on one side with reduced pressure to prevent the fibers from coming out on the other side and creating defects; in fact, if the pressure is high, the fibers of the unbound face tend to penetrate into the support fabric of the first cylinder; it is therefore necessary, to compensate for the lower binding efficiency resulting from this reduced pressure, to increase the number of treatment ramps (commonly referred to as "injectors"), which significantly increases the cost of the installation, complicates industrial implementation and results in high energy and water consumption.
Or on a trouvé, et c'est ce qui fait l'objet de la présente invention, une installation perfectionnée qui permet de réaliser de tels traitement par jets de fluide permettant de donner de la cohésion à des nappes fibreuses non tissées, pouvant être à base de fibres naturelles, synthétiques, seules ou en mélange, ou constituées par l'association de nappes non tissées et de renfort internes, tels que grilles textiles, tissus, tricots, nappes tramées, renforts longitudinaux.. . L'installation conforme à l'invention permet non seulement d'adapter beaucoup plus facilement les conditions de traitement à chaque type de structure textile, conduit à des aspects de surface après action du fluide beaucoup plus régulier et surtout permet, pour des articles équivalents, de conduire à une consommation en eau réduite ainsi qu'un nombre de passages sous les rampes d'entrelaçage moins important.However, we have found, and this is the subject of the present invention, an improved installation which makes it possible to carry out such treatment by jets of fluid making it possible to give cohesion to nonwoven fibrous sheets, which can be base of natural, synthetic fibers, alone or in mixture, or constituted by the association of nonwoven plies and internal reinforcement, such as textile grids, fabrics, knits, woven plies, longitudinal reinforcements ... The installation in accordance with the invention not only makes it possible to adapt the treatment conditions much more easily to each type of textile structure, leads to surface appearances after the action of the fluid much more regular and above all allows, for equivalent articles, lead to reduced water consumption and a lower number of passages under the interlacing ramps.
Par ailleurs, l'installation conforme à l'invention permet également de traiter des nappes fibreuses d'un grammage plus élevé que les installations conventionnelles où l'on effectue une série de traitements d'entrelaçage successifs sur chacune des faces de l'article. En effet, dans les machines conventionnelles, lorsque les nappes fibreuses ont un poids supérieur à 100 g/m2, et notamment lorsqu'elles sont constituées de fibres de faible denier, on a constaté qu'il se produisait des défauts d'aspect de surface (zones en relief et en creux) qui les rend inappropriées pour la plupart des applications.Furthermore, the installation according to the invention also makes it possible to treat fibrous webs of a higher grammage than conventional installations where a series of successive interlacing treatments is carried out on each of the faces of the article. In fact, in conventional machines, when the fibrous webs have a weight greater than 100 g / m2, and in particular when they are made of low denier fibers, it has been observed that surface appearance defects are produced (raised and recessed areas) which makes them unsuitable for most applications.
D'une manière générale, l'installation conforme à l'invention comporte, de manière connue, des moyens permettant de réaliser, comprimer et introduire une nappe fibreuse à l'intérieur d'une zone de traitement dans laquelle la nappe en mouvement est soumise à l'action d'une succession de rampes de jets d'eau sous pression qui agissent alternativement contre les deux faces de ladite nappe, ladite installation se caractérisant en ce que les moyens d'entrelaçage sont constitués par au moins une série de cylindres perforés, chaque cylindre étant associé à une rampe (ou injecteur) projetant des jets d'eau sous pression contre la surface de ladite nappe, lesdites rampes étant disposées en quinconce d'un cylindre de traitement au suivant, les jets agissant perpendiculairement contre la surface du produit traité et la vitesse périphérique des cylindres croissant légèrement d'un cylindre de traitement au suivant. L'augmentation de vitesse d'un cylindre de traitement au suivant permet de maintenir la nappe sous tension lors de la succession de phases de traitement, et entraîne l'élimination des défauts de surface qui apparaissent sur les machines conventionnelles. A titre indicatif, un accroissement de vitesse compris entre 0,5 et 3 % est adapté pour la plupart des grammages de nappes traitées.In general, the installation according to the invention comprises, in a known manner, means making it possible to compress, and introduce a fibrous sheet inside a treatment zone in which the moving sheet is subjected to the action of a succession of ramps of pressurized water jets which act alternately against the two faces of said sheet, said installation being characterized in that the interleaving means consist of at least one series of perforated cylinders , each cylinder being associated with a ramp (or injector) projecting jets of water under pressure against the surface of said sheet, said ramps being staggered from one treatment cylinder to the next, the jets acting perpendicularly against the surface of the processed product and the peripheral speed of the cylinders increasing slightly from one treatment cylinder to the next. The increase in speed from one treatment cylinder to the next keeps the sheet under tension during the succession of treatment phases, and leads to the elimination of surface defects which appear on conventional machines. As an indication, an increase in speed of between 0.5 and 3% is suitable for most grammages of treated webs.
Selon une forme de réalisation conforme à l'invention, l'installation comporte quatre rouleaux de traitement superposés associés chacun à une rampe projetant des jets d'eau sous pression contre la surface de la matière, le premier cylindre si l'on considère le cycle de production- étant associé à des moyens permettant d' assurer une densification de la nappe fibreuse de base non traitée.According to an embodiment according to the invention, the installation comprises four superposed treatment rollers each associated with a ramp projecting jets of water under pressure against the surface of the material, the first cylinder if we consider the cycle of production- being associated with means making it possible to ensure a densification of the untreated basic fibrous web.
De tels moyens permettant d'assurer la densification sont constitués essentiellement par un tapis transporteur sans fin poreux qui supporte la matière et qui est en appui tangentiel contre la surface du premier cylindre rotatif perforé à l'intérieur duquel on applique un vide partiel et qui permet donc de comprimer la nappe de base avant qu'elle ne soit soumise à l'action de la première rampe de jets sous pression ; dans cette forme de réalisation, lorsque la nappe de base est comprimée entre le tapis transporteur et le cylindre perforé rotatif, on réalise un mouillage de ladite nappe par l'intermédiaire d'un rideau d'eau, produit au moyen d'une rampe additionnelle disposée à l'intérieur du volume défini par le tapis transporteur, qui est dirigé contre la surface de ce dernier et qui traverse successivement ledit tapis poreux, la nappe comprimée avant d'être aspirée au travers du cylindre perforé. Si, pour la plupart des applications, deux traitements successifs sur chacune des faces endroit et envers permet d'obtenir de bons résultats, il peut être envisagé, dans une variante d'une installation conforme à l'invention, de réaliser une seconde série de traitements alternés au moyen d'un second ensemble de cylindres perforés et d'injecteurs superposés disposés en regard de la première série d'éléments de traitement.Such means for ensuring densification consist essentially of a porous endless conveyor belt which supports the material and which is in tangential abutment against the surface of the first rotary perforated cylinder inside which a partial vacuum is applied and which allows therefore compressing the base ply before it is subjected to the action of the first ramp of pressurized jets; in this embodiment, when the base ply is compressed between the conveyor belt and the rotary perforated cylinder, the said ply is wetted by means of a curtain of water, produced by means of an additional ramp disposed inside the volume defined by the conveyor belt, which is directed against the surface of the latter and which passes successively through said porous belt, the compressed sheet before being sucked through the perforated cylinder. If, for most applications, two successive treatments on each of the right and wrong sides allows good results to be obtained, it may be envisaged, in a variant of an installation according to the invention, to carry out a second series of alternating treatments by means of a second set of perforated cylinders and superimposed injectors arranged opposite the first series of treatment elements.
Grâce à une telle conception, il est non seulement possible d'obtenir une installation très compacte permettant de réaliser des traitements d'entrelaçage de la nappe dans lesquels on agit alternativement contre chaque face du produit de base, mais, par ailleurs, il a été constaté que lorsqu'une telle installation comportait des moyens de compactage avec prémouillage, qu'il était possible de réduire le nombre de rampes de traitement par rapport à un produit similaire réalisé sur des installations conventionnelles dans lesquelles on réalise plusieurs traitements successifs d'entrelaçage sur l'une des faces du support, puis sur l'autre face.Thanks to such a design, it is not only possible to obtain a very compact installation making it possible to carry out interlacing treatments of the sheet in which one acts alternately against each face of the basic product, but, moreover, it has been found that when such an installation included compaction means with pre-wetting, it was possible to reduce the number of treatment ramps compared to a similar product produced on conventional installations in which several successive interlacing treatments are carried out on one of the faces of the support, then on the other face.
II est évident que l'on ne sort pas du cadre de l'invention en réalisant une installation dans laquelle les cylindres seraient disposés non pas de manière superposée, mais côte à côte, les rampes ou injecteurs agissant, conformément à l'invention, alternativement contre chaque face de la nappe fibreuse.It is obvious that it is not going beyond the ambit of the invention to produce an installation in which the cylinders would be arranged not in a superimposed manner, but side by side, the ramps or injectors acting, in accordance with the invention, alternately against each side of the fibrous web.
L'invention et les avantages qu'elle apporte seront cependant mieux compris grâce à l'exemple de réalisation donné ci-après à titre indicatif mais non limitatif, et qui est illustré par les figures annexées dans lesquelles : - la figure 1 est une vue schématique en perspective montrant la structure générale d'une installation réalisée conformément à l'invention ;The invention and the advantages which it brings will however be better understood thanks to the embodiment given below for information but not limitation, and which is illustrated by the appended figures in which: - Figure 1 is a view schematic in perspective showing the general structure of an installation carried out in accordance with the invention;
- la figure 2 est une vue de détail en perspective montrant la structure d'une zone élémentaire de traitement d'entrelaçage que comporte une telle machine.- Figure 2 is a detailed perspective view showing the structure of an elementary interlacing treatment area that includes such a machine.
En se reportant aux schémas annexés et plus particulièrement à la figure 1, l'installation conforme à l'invention comporte, si l'on suit le sens de production de l'article, des moyens désignés par la référence générale (1) qui permettent de réaliser, comprimer et introduire une nappe fibreuse (2) à l'intérieur d'une zone de traitement proprement dite désignée par la référence générale (3), zone dans laquelle la nappe (2) en mouvement est soumise à l'action d'une succession de rampes de jets d'eau sous pression, rampes désignées par la même référence (R) affectées d'un indice et qui agissent alternativement contre les deux faces (N) et (S) de ladite nappe (2), nappe qui, après traitement, est reprise par un ensemble d'évacuation, désigné par la référence générale (4) où un traitement complémentaire peut éventuellement lui être appliqué.Referring to the attached diagrams and more particularly to Figure 1, the installation according to the invention comprises, if one follows the direction of production of the article, means designated by the general reference (1) which allow to produce, compress and introduce a fibrous web (2) inside a treatment zone proper designated by the general reference (3), zone in which the moving web (2) is subjected to the action of '' a succession of ramps of pressurized water jets, ramps designated by the same reference (R) assigned an index and which act alternately against the two faces (N) and (S) of said ply (2), ply which, after treatment, is taken up by an evacuation assembly, designated by the general reference (4) where additional treatment may possibly be applied to it.
Ainsi que cela ressort de la figure 1 annexée, selon une caractéristique de l'invention, l'ensemble des cylindres perforésAs can be seen from the appended FIG. 1, according to a characteristic of the invention, all of the perforated cylinders
(C1,C2,C3,C4) de la zone de traitement, sont montés superposés les uns par rapport aux autres, chaque cylindre étant associé à une rampe d'injecteurs (R1,R2,R3,R4) projetant des jets d'eau sous pression contre la surface de la nappe (2), lesdites rampes étant disposées en quinconce d'un rouleau de traitement au suivant et les jets agissant perpendiculairement contre la surface du produit à traiter. Par ailleurs, la vitesse périphérique des cylindres (C1,C2,C3,C4) est réglée pour qu'elle croisse progressivement d'un cylindre au suivant afin d'assurer la mise sous tension de la nappe lors des différentes phases du traitement. Une telle conception de machine permet donc de réaliser aisément un traitement alterné contre les faces (S) et CM) du produit. Dans l'exemple de réalisation illustré, une seconde série de cylindres perforés (C5,C6,C7) associés à des rampes (R5,R6,R7) est disposée parallèlement et en regard de la première série. Cette seconde série de rampes n'est pas indispensable et éventuellement, il pourrait être envisagé de réceptionner le produit traité immédiatement à la sortie de la dernière zone de traitement d'entrelaçage constituée par le cylindre (C4) et la rampe (R4).(C1, C2, C3, C4) of the treatment zone, are mounted superimposed with respect to each other, each cylinder being associated with a manifold of injectors (R1, R2, R3, R4) projecting jets of water under pressure against the surface of the sheet (2), said ramps being staggered from one treatment roller to the next and the jets acting perpendicularly against the surface of the product to be treated. Furthermore, the peripheral speed of the cylinders (C1, C2, C3, C4) is adjusted so that it gradually increases from one cylinder to the next in order to ensure the tensioning of the sheet during the various phases of the treatment. Such a machine design therefore makes it possible to easily carry out an alternating treatment against the faces (S) and CM) of the product. In the exemplary embodiment illustrated, a second series of perforated cylinders (C5, C6, C7) associated with ramps (R5, R6, R7) is arranged in parallel and facing the first series. This second series of ramps is not essential and possibly, it could be envisaged to receive the treated product immediately at the exit of the last interlacing treatment zone formed by the cylinder (C4) and the ramp (R4).
Chaque ensemble de traitement (C) et rampe (R) a une structure telle qu'illustrée à la figure 2.Each treatment assembly (C) and ramp (R) has a structure as illustrated in FIG. 2.
Le cylindre perforé (C) est constitué par un cylindre, en acier inoxydable de préférence, ayant un diamètre compris entre 200 mm et 1000 mm, et est entraîné en rotation par tous moyens appropriés de manière à avoir une vitesse périphérique égale à la vitesse d'entrée de la matière (2) dans l'installation. En général, cette vitesse est comprise entre 10 m/min et 200m/min et l'accroissement de vitesse d'un cylindre au suivant est de l'ordre de 0,5 à 3 %.The perforated cylinder (C) consists of a cylinder, preferably of stainless steel, having a diameter between 200 mm and 1000 mm, and is rotated by any suitable means so as to have a peripheral speed equal to the speed d entry of the material (2) into the installation. In general, this speed is between 10 m / min and 200m / min and the increase in speed from one cylinder to the next is of the order of 0.5 to 3%.
Les perforations (10) que comporte le cylindre sont de forme cylindrique ou en nid d'abeille, ledit cylindre étant avantageusement recouvert d'une toile en monofilament d'acier ou de matière plastique ou d'une tôle perforée présentant une porosité comprise entre 3 et 20 % (élément non représenté à la figure 2). La rampe ou injecteur (R) qui est disposé parallèlement à une génératrice du cylindre (C) est une rampe conventionnelle permettant de créer des jets ou aiguilles d'eau (11) avec une pression habituelle d'au moins 30 bars, parfois plus, de manière à provoquer l'entremêlement des fibres élémentaires de la nappe (2).The perforations (10) that the cylinder comprises are cylindrical or honeycomb, said cylinder advantageously being covered with a fabric of steel or plastic monofilament or of a perforated sheet having a porosity of between 3 and 20% (element not shown in Figure 2). The ramp or injector (R) which is arranged parallel to a generator of the cylinder (C) is a conventional ramp making it possible to create jets or needles of water (11) with a usual pressure of at least 30 bars, sometimes more, so as to cause the elementary fibers of the web (2) to become entangled.
Un tel injecteur peut être conçu d'une manière similaire aux enseignements de 1ΕP-A-0-400 249. A l'intérieur du cylindre (C), est disposée une caisse aspirante (12), fixe, coaxiale au cylindre rotatif (C), reliée à une source d'aspiration permettant de créer un vide partiel à l'intérieur de cette dernière. Cette caisse aspirante fixe (12) présente dans l'alignement des jets d'eau (11) une fente (13) de 10 mm environ de largeur permettant d'aspirer l'eau qui traverse la nappe fibreuse et le cylindre perforé (10).Such an injector can be designed in a similar manner to the teachings of 1ΕP-A-0-400 249. Inside the cylinder (C), there is a suction box (12), fixed, coaxial with the rotary cylinder (C), connected to a suction source making it possible to create a partial vacuum inside the latter. This fixed suction box (12) has in the alignment of the water jets (11) a slot (13) of about 10 mm in width allowing the suction of the water which passes through the fibrous web and the perforated cylinder (10). .
Dans le mode de réalisation illustré à la figure 1, le cylindre (Cl) du premier ensemble de traitement est conçu pour non seulement permettre l'opération d'entrelaçage telle qu'expliquée précédemment, mais également pour coopérer à la compression de la nappe (2) non traitée avant qu'elle ne soit soumise au traitement d'entrelaçage.In the embodiment illustrated in FIG. 1, the cylinder (Cl) of the first processing assembly is designed not only to allow the interlacing operation as explained above, but also to cooperate in the compression of the ply ( 2) untreated before it is subjected to interlacing treatment.
Pour ce faire, le cylindre (Cl) a un diamètre qui de préférence est supérieur au diamètre des autres cylindres de l'installation, et qui est avantageusement compris entre 500 mm et 1000 mm. Ce cylindre est en appui contre un tapis transporteur poreux, sans fin (14), qui permet l'introduction de la nappe à l'intérieur de la zone de traitement. Ce support poreux a une vitesse synchronisée avec celle du cylindre. Il permet donc de réaliser une compression de la nappe (1) entre la surface du cylindre (Cl) et sa propre surface avant qu'il ne soit soumis à l'action de la première rampe de jets haute pression (RI). Il a été constaté qu'il était avantageux lors de cette opération de compression de la nappe, de réaliser un mouillage de cette dernière. Pour ce faire, à l'intérieur du volume défini par le tapis transporteur (14), est disposée une rampe (15) créant un rideau d'eau sous légère pression agissant au travers de l'ensemble support poreux (14)/nappe comprimée (2) et cylindre perforé (1). Pour permettre d'éliminer l'eau traversant les éléments précités, une seconde fente (16) est prévue sur la caisse aspirante fixe (12), et ce en regard de la rampe d'eau. Cette fente d'évacuation a une largeur comprise entre 10 et 20 mm. Cette rampe de mouillage (15) forme un rideau d'eau continu sous légère pression et est disposé en regard de la toile poreuse support (14) à une distance comprise entre 10 et 100 mm dudit support poreux. La pression d'eau issue de ces jets est comprise entre 3 et 15 bars, et de préférence voisine de 3 à 8 bars. En-deça de 3 bars, le rideau se disperse trop rapidement et au-delà de 15 bars, le surcoût n'est pas justifié. Il importe que le rideau d'eau issu de cette première rampe agisse perpendiculairement la nappe de base en mouvement qui avance et se comprime de manière à la mouiller dans des conditions optimales.To do this, the cylinder (Cl) has a diameter which preferably is greater than the diameter of the other cylinders of the installation, and which is advantageously between 500 mm and 1000 mm. This cylinder is in abutment against an endless porous conveyor belt (14), which allows the introduction of the sheet inside the treatment zone. This porous support has a speed synchronized with that of the cylinder. It therefore makes it possible to achieve compression of the ply (1) between the surface of the cylinder (Cl) and its own surface before it is subjected to the action of the first ramp of high pressure jets (RI). It was found that it was advantageous during this operation of compressing the sheet, to make a wetting of the latter. To do this, inside the volume defined by the conveyor belt (14), is arranged a ramp (15) creating a curtain of water under slight pressure acting through the porous support assembly (14) / compressed sheet (2) and perforated cylinder (1). To allow the elimination of water passing through the aforementioned elements, a second slot (16) is provided on the fixed suction box (12), and this opposite the water ramp. This discharge slot has a width of between 10 and 20 mm. This mooring ramp (15) forms a continuous curtain of water under slight pressure and is arranged opposite the porous support fabric (14) at a distance between 10 and 100 mm from said porous support. The water pressure from these jets is between 3 and 15 bars, and preferably close to 3 to 8 bars. Below 3 bars, the curtain disperses too quickly and beyond 15 bars, the additional cost is not justified. It is important that the curtain of water from this first ramp acts perpendicularly to the moving base sheet which advances and compresses so as to wet it under optimal conditions.
En sortie de la zone de traitement (3), la nappe (2) séchée est réceptionnée de manière conventionnelle en (4), par exemple par l'intermédiaire d'un tapis transporteur sans fin (17). Dans la zone de réception, la nappe (2) peut subir un traitement additionnel, par exemple un traitement permettant de réaliser des motifs perforés dans la nappe au moyen d'un ensemble (16) du type décrit dans le brevet européen 0400249.On leaving the treatment zone (3), the dried sheet (2) is received in a conventional manner at (4), for example by means of an endless conveyor belt (17). In the reception area, the sheet (2) can undergo an additional treatment, for example a treatment making it possible to produce perforated patterns in the sheet by means of an assembly (16) of the type described in European patent 0400249.
Les avantages qu'apporte l'installation conforme à l'invention ressortiront cependant mieux de l'exemple concret de mise en oeuvre donné ci-après.The advantages of the installation according to the invention will however emerge more clearly from the concrete example of implementation given below.
ExempleExample
Sur une installation telle que définie précédemment, on introduit une nappe non tissée (2) à base de fibres de polyester ayant un titre de 3,3 dtex et une longueur de 38 mm, pesant 200 g/m2 et dont l'épaisseur est de 8 cm. La vitesse d'introduction de la nappe est de 20 m/min. Cette nappe est amenée à la zone proprement dite (3) par passage sur un tapis transporteur (14) présentant une porosité de 46 %. La nappe est comprimée entre le premier cylindre rotatif (13) et ledit tapis transporteur et soumise à l'action d'un rideau d'eau produit par la rampe (15) dont la sortie est à une distance de 100 mm de la surface interne du tapis transporteur (14). La pression de l'eau issue de la rampe (15) est réglée à 10 bars.On an installation as defined above, a nonwoven web (2) based on polyester fibers is introduced having a titer of 3.3 dtex and a length of 38 mm, weighing 200 g / m2 and the thickness of which is 8 cm. The speed of introduction of the sheet is 20 m / min. This sheet is brought to the zone proper (3) by passing over a conveyor belt (14) having a porosity of 46%. The sheet is compressed between the first rotary cylinder (13) and said conveyor belt and subjected to the action of a curtain of water produced by the ramp (15), the outlet of which is at a distance of 100 mm from the internal surface. of the conveyor belt (14). The pressure of the water coming from the ramp (15) is adjusted to 10 bars.
La nappe comprimée est alors soumise à l'action des jets d'eau issus des rampes (R1,R2,R3,R4) qui agissent alternativement sur les faces (N) et (S) de ladite nappe.The compressed sheet is then subjected to the action of the water jets from the ramps (R1, R2, R3, R4) which act alternately on the faces (N) and (S) of said sheet.
Les quatre rampes (R1-R4) produisent toutes 1250 jets au mètre et sont réglées de la manière suivante.The four ramps (R1-R4) all produce 1250 jets per meter and are adjusted as follows.
Ordre des rampes Diamètre du jet Pression Vitesse en m/min des cylindresOrder of the ramps Diameter of the jet Pressure Speed in m / min of the cylinders
RI : face N 140 μ 150 bars Cl : 20m/minRI: face N 140 μ 150 bars Cl: 20m / min
R2 : face S 140 μm 180 bars C2 : 20,2m/minR2: side S 140 μm 180 bars C2: 20.2m / min
R3 : face N 140 μm 180 bars C3 : 20/4m/minR3: side N 140 μm 180 bars C3: 20 / 4m / min
R4 : face S 140 μm 180 bars C4 : 20,6m /minR4: side S 140 μm 180 bars C4: 20.6m / min
La nappe passe ensuite directement sur le tapis transporteur de réception (4) sans être traitée dans la seconde série d'ensembles cylindres perforé jets illustrée à la figure 1. Une telle nappe présente un état de surface très régulier, identique sur ses deux faces, et a les caractéristiques mécaniques suivantes mesurées sur un échantillon de 50 mm de largeur :The ply then passes directly over the receiving conveyor belt (4) without being treated in the second series of sets of perforated jets cylinders illustrated in FIG. 1. Such a sheet has a very regular surface condition, identical on both sides, and has the following mechanical characteristics measured on a sample 50 mm wide:
- résistance sens long : 418 Newton - résistance sens travers : 1066 Newton.- long direction resistance: 418 Newton - cross direction resistance: 1066 Newton.
A titre indicatif, la réalisation d'un article similaire sur une installation conventionnelle dans laquelle on réalise plusieurs traitements successifs sur une face avant de traiter de manière similaire l'autre face, la vitesse de la matière étant constante et réglée à 20 m/min, nécessite de travailler dans les conditions suivantes :As an indication, the production of a similar article on a conventional installation in which several successive treatments are carried out on one side before treating the other side in a similar manner, the speed of the material being constant and adjusted to 20 m / min , requires working under the following conditions:
Ordre des rampes Diamètre du jet PressionRamp order Jet diameter Pressure
1ère face N no. 1 140 μm 150 bars no. 2 140 μm 180 bars no. 3 140 μm 180 bars1st side N no. 1140 μm 150 bars no. 2 140 μm 180 bars no. 3 140 μm 180 bars
2ème face S no. 1 140 μm 180 bars no. 2 140 μm 180 bars no. 3 140 μm 180 bars2nd side S no. 1140 μm 180 bars no. 2 140 μm 180 bars no. 3 140 μm 180 bars
L'article traité dans ces conditions présente des caractéristiques mécaniques similaires, mais on constate qu'une partie des fibres réorientées lors du traitement sur la face N apparaissent sur la seconde face S qui présente un aspect pelucheux et non pas régulier. De plus, la planéité de l'article est moins bonne que celle de l'article réalisé sur une machine conforme à l'invention. Par ailleurs, la consommation d'énergie nécessaire au liage est, dans une machine réalisée conformément à l'invention, de l'ordre de 0,65 Kwh par kilogramme de non tissé, alors qu'elle s'élève à 0,94 Kwh dans le cas d'une installation conventionnelle.The article treated under these conditions has similar mechanical characteristics, but it is found that a portion of the fibers redirected during treatment on the N side appear on the second side S which has a fluffy and not regular appearance. In addition, the flatness of the article is less good than that of the article produced on a machine according to the invention. Furthermore, the energy consumption necessary for binding is, in a machine produced in accordance with the invention, of the order of 0.65 Kwh per kilogram of nonwoven, while it amounts to 0.94 Kwh in the case of a conventional installation.
De plus, si les installations antérieures ne comportent que deux cylindres perforés associés chacun à une pluralité de rampes de traitement, l'installation conforme à l'invention implique autant de cylindres que de rampes de traitement, cette dernière s'avérant cependant être d'un coût moins élevé puisque pour la production d'articles similaires, elle nécessite un nombre inférieur de rampes de traitement, une consommation d'eau plus faible avec une économie d'énergie de près de 50 %, et ce pour obtenir un meilleur résultat final.In addition, if the previous installations only have two perforated cylinders each associated with a plurality of treatment ramps, the installation according to the invention involves as many cylinders as treatment ramps, the latter however proving to be of a lower cost since for the production of similar articles, it requires a lower number of treatment ramps, lower water consumption with an energy saving of almost 50%, and this to obtain a better final result .
Bien entendu, l'invention n'est pas limitée à l'exemple de réalisation décrit et illustré, mais couvre toutes les variantes réalisées dans le même esprit, notamment celles qui comporteraient des cylindres perforés disposés parallèlement les uns aux autres à condition que les rampes projetant les jets d'eau agissent alternativement contre les deux faces de la nappe fibreuse traitée et que la vitesse périphérique des cylindres augmente progressivement d'une zone de traitement à la suivante. Of course, the invention is not limited to the embodiment described and illustrated, but covers all the variants produced in the same spirit, in particular those which would include perforated cylinders arranged parallel to each other provided that the ramps projecting the water jets act alternately against the two faces of the treated fibrous web and that the peripheral speed of the cylinders gradually increases from one treatment zone to the next.

Claims

REVENDICATIONS
1 / Installation pour la réalisation de nappes non tissées dont la cohésion est obtenue par l'action de jets de fluide, comportant des moyens (1) permettant de réaliser, comprimer et introduire une nappe fibreuse (2) à l'intérieur d'une zone de traitement (3) dans laquelle la nappe (2) en mouvement est soumise à l'action d'une succession de rampes de jets d'eau sous pression qui agissent alternativement contre les deux faces de ladite nappe (2), caractérisée en ce que les moyens d'entrelaçage sont constitués par au moins une série de cylindres perforés (C1,C2,C3,C4), chaque cylindre étant associé à une rampe (R1,R2,R3,R4) projetant dés jets d'eau sous pression contre la surface de ladite nappe (2), lesdites rampes (R1,R2,R3,R4) étant disposées en quinconce d'un cylindre de traitement au suivant, les jets agissant perpendiculairement contre la surface du produit traité et la vitesse périphérique des cylindres augmentant progressivement d'une zone de traitement à la suivante.1 / Installation for the production of nonwoven sheets whose cohesion is obtained by the action of jets of fluid, comprising means (1) making it possible to compress, and introduce a fibrous sheet (2) inside a treatment zone (3) in which the moving sheet (2) is subjected to the action of a succession of ramps of pressurized water jets which act alternately against the two faces of said sheet (2), characterized in that the interleaving means consist of at least one series of perforated cylinders (C1, C2, C3, C4), each cylinder being associated with a ramp (R1, R2, R3, R4) projecting water jets under pressure against the surface of said ply (2), said ramps (R1, R2, R3, R4) being staggered from one treatment cylinder to the next, the jets acting perpendicularly against the surface of the treated product and the peripheral speed of the cylinders gradually increasing from one treatment area to the next next.
2/ Installation selon la revendication 1, caractérisée en ce que les cylindres perforés (C1,C2,C3,C4) sont superposés les uns par rapport aux autres.2 / Installation according to claim 1, characterized in that the perforated cylinders (C1, C2, C3, C4) are superimposed relative to each other.
3/ Installation selon l'une des revendications 1 et 2, caractérisée en ce que l'augmentation de la vitesse d'un cylindre au suivant est comprise entre 0,5 et 3 %.3 / Installation according to one of claims 1 and 2, characterized in that the increase in speed from one cylinder to the next is between 0.5 and 3%.
4/ Installation selon l'une des revendications 1 à 3, caractérisé en ce que le premier cylindre (Cl), si l'on considère le sens de production, est associé à des moyens permettant d' assurer une densification de la nappe (2). 5/ Installation selon la revendication 4, caractérisé en ce que les moyens permettant d'assurer la densification sont constitués par un tapis transporteur sans fin poreux (14) qui supporte la matière et qui est en appui tangentiel contre la surface du premier cylindre rotatif (Cl) perforé à l'intérieur duquel on applique un vide partiel et qui permet de comprimer la nappe de base avant qu'elle ne soit soumise à l'action de la première rampe de jets sous pression, le mouillage de ladite nappe étant réalisé par l'intermédiaire d'un rideau d'eau produit au moyen d'une rampe additionnelle (15) disposée à l'intérieur du volume défini par le tapis transporteur (14), ce rideau d'eau étant dirigé contre la surface dudit tapis et traversant successivement celui-ci, la nappe comprimée avant d'être aspiré au travers du cylindre perforé (Cl).4 / Installation according to one of claims 1 to 3, characterized in that the first cylinder (Cl), if we consider the direction of production, is associated with means for ensuring a densification of the web (2 ). 5 / Installation according to claim 4, characterized in that the means for ensuring the densification consist of a porous endless conveyor belt (14) which supports the material and which is in tangential support against the surface of the first rotary cylinder ( Cl) perforated inside which a partial vacuum is applied and which makes it possible to compress the base ply before it is subjected to the action of the first ramp of pressurized jets, the wetting of said ply being carried out by by means of a curtain of water produced by means of an additional ramp (15) arranged inside the volume defined by the conveyor belt (14), this curtain of water being directed against the surface of said carpet and successively passing through it, the compressed sheet before being sucked through the perforated cylinder (Cl).
6/ Installation selon l'une des revendications 2 à 5, caractérisée en ce qu'elle comporte un second ensemble de cylindres perforés (C5,C6,C7) et d'injecteurs (A5,A6,A7) superposés et disposés en regard de la première série d'éléments de traitement. 6 / Installation according to one of claims 2 to 5, characterized in that it comprises a second set of perforated cylinders (C5, C6, C7) and injectors (A5, A6, A7) superimposed and arranged opposite the first set of processing elements.
EP96904126A 1995-03-02 1996-02-13 Apparatus for producing fluid jet-bonded non-woven webs Expired - Lifetime EP0772705B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29623007U DE29623007U1 (en) 1995-03-02 1996-02-13 Device for producing non-woven cloths, the cohesion of which is produced by the action of liquid jets

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9502665A FR2731236B1 (en) 1995-03-02 1995-03-02 INSTALLATION FOR THE PRODUCTION OF NONWOVEN TABLECLOTHS WHICH COHESION IS OBTAINED BY THE ACTION OF FLUID JETS
FR9502665 1995-03-02
PCT/FR1996/000227 WO1996027040A1 (en) 1995-03-02 1996-02-13 Apparatus for producing fluid jet-bonded non-woven webs

Publications (2)

Publication Number Publication Date
EP0772705A1 true EP0772705A1 (en) 1997-05-14
EP0772705B1 EP0772705B1 (en) 1997-09-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96904126A Expired - Lifetime EP0772705B1 (en) 1995-03-02 1996-02-13 Apparatus for producing fluid jet-bonded non-woven webs

Country Status (8)

Country Link
US (1) US5727292A (en)
EP (1) EP0772705B1 (en)
JP (1) JPH09512596A (en)
AT (1) ATE158619T1 (en)
DE (2) DE772705T1 (en)
ES (1) ES2100147T3 (en)
FR (1) FR2731236B1 (en)
WO (1) WO1996027040A1 (en)

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DE19627256A1 (en) * 1996-07-08 1998-01-15 Fleissner Maschf Gmbh Co Method and device for the hydromechanical interlacing of the fibers of a fiber web
FR2802553B1 (en) * 1999-12-17 2002-01-04 Icbt Perfojet Sa DEVICE FOR TREATING SHEET MATERIALS USING PRESSURE WATER JETS
US6442809B1 (en) * 1997-12-05 2002-09-03 Polymer Group, Inc. Fabric hydroenhancement method and equipment for improved efficiency
DE19852717A1 (en) * 1998-11-16 2000-05-18 Fleissner Maschf Gmbh Co Device for the production of perforated nonwovens by means of hydrodynamic needling
DE19925703A1 (en) * 1999-06-06 2000-12-07 Fleissner Maschf Gmbh Co Suction device on a textile machine, such as in particular a water needling machine
FR2794776B1 (en) * 1999-06-10 2001-10-05 Icbt Perfojet Sa PROCESS FOR THE PRODUCTION OF A NONWOVEN MATERIAL, INSTALLATION FOR ITS IMPLEMENTATION AND NONWOVEN THUS OBTAINED
FR2806426B1 (en) * 2000-03-16 2002-05-31 Rieter Perfojet INSTALLATION FOR THE PRODUCTION OF NONWOVEN TABLECLOTHS WHICH COHESION IS OBTAINED BY THE ACTION OF FLUID JETS
DE10018920A1 (en) * 2000-04-17 2001-10-18 Fleissner Gerold Suction extraction tube, for a water needle jet bonding assembly for nonwoven fabrics, comprises a suction slit kept open by inserted clip(s), with a self-cleaning action to prevent a build-up of fiber debris
WO2002072935A2 (en) * 2000-11-08 2002-09-19 Milliken & Company Hydraulic napping of fancy weave fabrics
US6668435B2 (en) 2001-01-09 2003-12-30 Milliken & Company Loop pile fabrics and methods for making same
FR2838457B1 (en) * 2002-04-12 2004-08-27 Rieter Perfojet DRUM FOR INSTALLATION FOR PRODUCING A NON-WOVEN TABLECLOTH, METHOD FOR PRODUCING A NON-WOVEN TABLECLOTH, AND NON-WOVEN TABLECLOTH OBTAINED
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Also Published As

Publication number Publication date
DE69600069D1 (en) 1997-10-30
ATE158619T1 (en) 1997-10-15
WO1996027040A1 (en) 1996-09-06
EP0772705B1 (en) 1997-09-24
JPH09512596A (en) 1997-12-16
DE772705T1 (en) 1997-09-25
US5727292A (en) 1998-03-17
FR2731236A1 (en) 1996-09-06
ES2100147T1 (en) 1997-06-16
DE69600069T2 (en) 1998-02-05
FR2731236B1 (en) 1997-04-11
ES2100147T3 (en) 1997-12-16

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