EP0527092B1 - Textile Armierung benutzbar für die Herstellung von geschichteten Zusammenstellungen und Verfahren zu deren Erhalt - Google Patents

Textile Armierung benutzbar für die Herstellung von geschichteten Zusammenstellungen und Verfahren zu deren Erhalt Download PDF

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Publication number
EP0527092B1
EP0527092B1 EP92420224A EP92420224A EP0527092B1 EP 0527092 B1 EP0527092 B1 EP 0527092B1 EP 92420224 A EP92420224 A EP 92420224A EP 92420224 A EP92420224 A EP 92420224A EP 0527092 B1 EP0527092 B1 EP 0527092B1
Authority
EP
European Patent Office
Prior art keywords
yarns
braid
another
series
wires
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.)
Expired - Lifetime
Application number
EP92420224A
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English (en)
French (fr)
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EP0527092A1 (de
Inventor
André Fourezon
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.)
Fils dAuguste Chomarat et Cie SA
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Fils dAuguste Chomarat et Cie SA
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
    • D04C1/02—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof made from particular materials
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
    • D10B2403/02411—Fabric incorporating additional compounds enhancing mechanical properties with a single array of unbent yarn, e.g. unidirectional reinforcement fabrics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/02—Reinforcing materials; Prepregs

Definitions

  • the invention relates to an improvement made to the textile reinforcements used for the production of laminate complexes, that is to say articles based on resin (polyester or others), reinforced by a textile reinforcement structure.
  • Such braided sheaths which are particularly suitable for the production of tubular articles, are constituted, in a known manner, by two series of interlaced wires arranged at an angle with respect to the generator of the braid. During the manufacture of these braids, the wires are generally oriented at 45 ° relative to the generator. This material being deformable, it is therefore possible to play on this deformability in order to obtain laminated complexes of variable shapes and / or to vary the resistance either in the longitudinal direction or in the transverse direction. Thus, it is possible to considerably improve the longitudinal resistance by stretching the braid lengthwise, which causes the tubular sheath to tighten, and directs the wires which compose it in a direction which tends to approach the generator.
  • Such braids made up of two series of crossed threads are generally designated by the expression "bidirectional braids”.
  • braids designated by the expression "three-way braids", in which a third series of wires is arranged parallel to the generator and is trapped between the two series of wires arranged in bias.
  • Such three-way braids can be used either alone or optionally have an internal core as described in FR-A-2 379 376, which can be impregnated with a thermoplastic matrix, which makes it possible to obtain directly on the machine braiding a composite tubular structure as shown in EP-A-0 327 085.
  • such reinforcing structures are suitable for the production of cylindrical elements (tubes, windsurfing masts, tennis rackets, etc.), on the other hand, they are not suitable when it is desired to make materials laminates of small thickness, flat or shaped, obtained in particular according to the technique known as "pultrusion", a technique which, in general, consists in producing profiles continuously by extruding a thermosetting resin and by continuously incorporating a reinforcement therein textile and which therefore involves significant tensioning, and therefore requires the use of non-deformable reinforcements, a property incompatible with that of a braid where, by nature, the threads can be easily moved relative to each other.
  • the three-way frame according to the invention can, for its part, be obtained according to a simple process, on conventional braiding material, without any adaptation of the latter as regards the production of the basic three-way braid entering its realization, and this according to a simple process which is also part of the invention.
  • the reinforcement according to the invention comprises three series of wires oriented differently with respect to each other, two being arranged at an angle, in opposite directions to each other, with respect to the length , and the wires of the third being in turn arranged parallel to the length, and trapped between the two series of wires arranged at an angle, and in which said longitudinal wires consist at least in part of wires having fusible properties, the adhesive characteristics are revealed after completion of the braid, and make it possible to ensure the connection of the bidirectional external layers without the possibility of displacement of the positioning of the wires relative to each other, characterized in that said tubular braid is cut according to one of its generators and then laid flat giving a reinforcement in the form of a flexible sheet constituted by a single layer three-way.
  • a material which not only has the advantages of braided textile reinforcements (orientation of the filaments at an angle relative to the length and this, at a determined angle, which can be easily adjusted during the production of said braid), but which does not have the disadvantages (deformability) which are harmful when it is desired to produce a profiled structure, the wires of the unidirectional sheet being, moreover, kept as flat and as straight as possible, without displacing the relative to each other, a necessary condition for obtaining a good quality laminate complex, especially when it is thin.
  • such a structure makes it possible to produce materials which can either be composed of yarns of the same kind (for example entirely based on son of glass, carbon, boron, silica, aromatic polyamide, etc.), or make a combination of different reinforcing threads, for example alternating glass and carbon threads, both in the bidirectional structure and in the unidirectional ply. It can also be envisaged to incorporate, in one or all of the plies, metallic wires allowing optionally to shape the reinforcement material and / or to give it specific properties.
  • the invention also relates to a method allowing the production of such a material, said method consisting in forming a tubular braid comprising at least two series of threads intertwined with respect to each other, and arranged at an angle with respect to the generator of the braided sheath, to be introduced simultaneously with the formation of the braid, inside the latter, between the threads arranged at an angle, a series of longitudinal, parallel threads, at least part of which consists of threads having fusible properties, the positioning of the transverse and longitudinal wires with respect to each other is fixed on the braiding machine by a heat treatment revealing the properties of the fusible wires, said heat treatment being carried out by keeping the tubular braid in shape, characterized in that, after fixing the wires relative to each other, said braid is cut according to a generator and it is laid flat, thus giving an armature constituted by a single three-way layer.
  • the textile reinforcement according to the invention is therefore in the form of a flat strip, designated by the general reference (1 ), of very long length L compared to its width l . It comprises three series of wires oriented differently from each other. Two of these series of wires (1a, 1b) are arranged at an angle, in opposite directions to each other with respect to the length L of the strip. The wires (2) of the third series are, in turn, arranged parallel to the length L and are trapped between the two series of wires (1a, 1b) which are braided together.
  • the threads (2) of the undirectional sheet consist at least in part of threads having fusible properties revealed by heat treatment.
  • Such threads (2) can be, for example, constituted by threads of the "core / sheath" type, the core being constituted by glass filaments, the sheath by a coating based on a polymer, such as a copolyamide.
  • Such a complex structure is obtained directly on a conventional braiding machine, making it possible to produce a tubular braid comprising two series of wires arranged at an angle (1a, 1b), between which are trapped longitudinal wires (2).
  • the orientation of the wires arranged at an angle is obtained by adjusting, in a known manner, the braiding angle.
  • the braiding angle can be either fixed, which makes it possible to obtain an article of determined width l , or possibly be variable during production, making it possible to obtain a braid of variable section.
  • the tubular braid is subjected to a pressure at the outlet of the machine so that it becomes flat, the heat treatment making it possible to reveal the fusible properties of the longitudinal threads being carried out, either during this flattening phase either after this, which makes it possible to link the different layers of the complex together.
  • the heat treatment revealing the properties of the fusible wires of the unidirectional sheet is carried out by maintaining the braid in its circular form, which then makes it possible to cut it according to a generator to return it to flat and get a larger item.
  • the material according to the invention is produced on a conventional braiding machine, of the "SPIRALTEX” type comprising 96 spindles and therefore making it possible to produce a bidirectional braid having two oriented plies in reverse, and each consisting of 48 wires.
  • the son (2) of the unidirectional sheet are incorporated into the braid in a known manner.
  • the plies forming the threads arranged at an angle (la, lb), consist of wicks of carbon threads, having a titer of 400 tex.
  • the unidirectional sheet (wires 2) is constituted by wires of the core / sheath type, the core being based on a 22 tex glass wire and the sheath constituted by a copolyamide-based coating, the melting point of which is approximately 115 ° C.
  • the material comprises on the one hand, fusible wires (2) of the aforementioned type used as longitudinal element and, on the other hand arranged in parallel with these fusible wires, wires (2a) , made of carbon wicks.
  • the complexes thus produced can be used in numerous applications, such as for example as reinforcements of profiles obtained by pultrusion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Package Frames And Binding Bands (AREA)
  • Reinforced Plastic Materials (AREA)
  • Woven Fabrics (AREA)

Claims (2)

  1. Textile Armierung, die zur Herstellung von insbesondere nach dem "Zieh-Strangpressen" genannten Verfahren gewonnenen Schichtverbundwerkstoffen verwendbar ist, mit drei Sätzen von relativ zueinander unterschiedlich orientierten Fäden (1a, 1b, 2), wobei zwei (1a, 1b) in zueinander entgegengesetzter Richtung schräg zur Längsrichtung angeordnet sind, und wobei die Fäden (2) des dritten Satzes ihrerseits parallel zur Längsrichtung angeordnet und zwischen den beiden Sätzen der schräg angeordneten Fäden (1a, 1b) eingeschlossen sind, und bei der die längsverlaufenden Fäden (2) zumindest teilweise aus Fäden mit einer Warmklebefähigkeit gebildet werden, deren Adhäsionsvermögen nach Herstellung des Geflechts entwickelt wurde, und die die Verbindung der äußeren zweiseitig gerichteten Lagen (1a, 1b) gewährleisten, ohne daß sich die Fäden aus ihrer Lage relativ zueinander verschieben können, dadurch gekennzeichnet, daß das röhrenförmige Geflecht entlang einer Mantellinie aufgeschnitten und anschließend flach ausgebreitet wurde, wodurch eine Armierung in Form einer biegsamen Faserbahn erhalten wird, die aus einer einzigen dreiseitig gerichteten Lage besteht.
  2. Verfahren zur Herstellung eines Materials nach Anspruch 1, bei dem ein röhrenförmiges Geflecht gebildet wird, das zumindest zwei Sätze von ineinander verflochtenen und schräg zur Mantellinie des geflochtenen Schlauches angeordneten Fäden (1a, 1b) aufweist, und bei dem gleichzeitig mit dem Bilden des Geflechts in dieses ein Satz von parallelen längsverlaufenden Fäden (2) zwischen die schräg angeordneten Fäden (1a, 1b) eingefügt wird, die zumindest teilweise aus Fäden mit einer Warmklebefähigkeit gebildet werden, wobei die relative Lage der quer- und längsverlaufenden Fäden auf der Flechtmaschine durch eine thermische Behandlung fixiert wird, durch die die Warmklebefähigkeit der Fäden entwickelt wird, wobei die thermische Behandlung unter Beibehaltung der Form des röhrenförmigen Geflechts durchgeführt wird, dadurch gekennzeichnet, daß das Geflecht entlang einer Mantellinie aufgeschnitten und flach ausgebreitet wird, nachdem die Fäden relativ zueinander fixiert worden sind, wodurch eine Armierung erhalten wird, die aus einer einzigen dreiseitig gerichteten Lage besteht.
EP92420224A 1991-07-31 1992-06-30 Textile Armierung benutzbar für die Herstellung von geschichteten Zusammenstellungen und Verfahren zu deren Erhalt Expired - Lifetime EP0527092B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109972A FR2679931B1 (fr) 1991-07-31 1991-07-31 Armature textile utilisable pour la realisation de complexes stratifies et procede pour son obtention.
FR9109972 1991-07-31

Publications (2)

Publication Number Publication Date
EP0527092A1 EP0527092A1 (de) 1993-02-10
EP0527092B1 true EP0527092B1 (de) 1997-04-23

Family

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Application Number Title Priority Date Filing Date
EP92420224A Expired - Lifetime EP0527092B1 (de) 1991-07-31 1992-06-30 Textile Armierung benutzbar für die Herstellung von geschichteten Zusammenstellungen und Verfahren zu deren Erhalt

Country Status (5)

Country Link
EP (1) EP0527092B1 (de)
AT (1) ATE152192T1 (de)
DE (1) DE69219237T2 (de)
ES (1) ES2101067T3 (de)
FR (1) FR2679931B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2753993B1 (fr) 1996-10-01 1998-11-27 Aerospatiale Structure tubulaire tressee pour piece composite, sa realisation et ses applications
FR2982167B1 (fr) 2011-11-04 2014-06-20 Ifsttar Institut Francais Des Sciences Et Technologies Des Transp De Lamenagement Et Des Reseaux Dispositif de protection de l'articulation du genou apte a cooperer avec une chaussure de ski

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD129340B1 (de) * 1977-01-31 1979-11-28 Harald Perner Naehgewirke aus glasfaserstoffen
GB2067612A (en) * 1980-01-23 1981-07-30 Smith H R Fibre reinforced materials and methods of making and using them
FR2510624A1 (fr) * 1981-07-31 1983-02-04 Verre Tisse Sa Materiau textile tresse pour le renforcement d'articles stratifies
FR2577946B1 (fr) * 1985-02-22 1987-03-27 Chomarat & Cie Armature textile utilisable pour la realisation de complexes stratifies
US4857124A (en) * 1987-12-14 1989-08-15 Plas/Steel Products, Inc. Fiber-reinforced plastic strut connecting link
CA1309283C (en) * 1988-02-02 1992-10-27 Ronald Frank Mcconnell In-line consolidation of braided structures

Also Published As

Publication number Publication date
ES2101067T3 (es) 1997-07-01
EP0527092A1 (de) 1993-02-10
FR2679931A1 (fr) 1993-02-05
FR2679931B1 (fr) 1994-12-23
DE69219237T2 (de) 1997-08-07
DE69219237D1 (de) 1997-05-28
ATE152192T1 (de) 1997-05-15

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