EP0344650B1 - Procédé de fabrication d'un fil multifilamentaire inorganique - Google Patents

Procédé de fabrication d'un fil multifilamentaire inorganique Download PDF

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Publication number
EP0344650B1
EP0344650B1 EP89109563A EP89109563A EP0344650B1 EP 0344650 B1 EP0344650 B1 EP 0344650B1 EP 89109563 A EP89109563 A EP 89109563A EP 89109563 A EP89109563 A EP 89109563A EP 0344650 B1 EP0344650 B1 EP 0344650B1
Authority
EP
European Patent Office
Prior art keywords
fibre bundle
main
fibres
accompanying
fiber bundle
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
EP89109563A
Other languages
German (de)
English (en)
Other versions
EP0344650A3 (en
EP0344650A2 (fr
Inventor
Wolfgang Noelle
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.)
Oerlikon Barmag AG
Original Assignee
Barmag AG
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 Barmag AG filed Critical Barmag AG
Publication of EP0344650A2 publication Critical patent/EP0344650A2/fr
Publication of EP0344650A3 publication Critical patent/EP0344650A3/de
Application granted granted Critical
Publication of EP0344650B1 publication Critical patent/EP0344650B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
    • D02G3/402—Yarns in which fibres are united by adhesives; Impregnated yarns or threads the adhesive being one component of the yarn, i.e. thermoplastic yarn
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • D02G1/165—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam characterised by the use of certain filaments or yarns

Definitions

  • the invention relates to the method for producing a multifilament, inorganic thread according to the preamble of claim 1 and a fiber-reinforced composite material.
  • This method is known and customary for the production of threads with a glass fiber core.
  • a main fiber bundle made of the inorganic glass fibers is replaced by a guide made of thermoplastic material, e.g. Polyamide, polyethylene, polypropylene, wrapped.
  • thermoplastic material e.g. Polyamide, polyethylene, polypropylene
  • the object of the invention is to develop the method according to the preamble of claim 1 so that an immediately usable inorganic thread with a round and compact cross-section as possible can be produced in a fast and relatively inexpensive process with regard to the technical equipment required.
  • the main fiber bundle is also subjected to transverse forces when subjected to tensile loads, which lead to breakage in particular with glass threads and carbon fibers.
  • the heating of the combined fiber bundle provided according to the invention can take place after winding up or before winding up in a further intermediate process step.
  • the fibers of the thermoplastic companion fiber bundle shrink as a result of the heating, and at the same time they melt and attach themselves to the surface of the main fiber bundle.
  • the fibers of the main fiber bundle are held together and at the same time are fixed in an essentially round, compact cross section.
  • the thermoplastic fibers of the accompanying fiber bundle also melt at least on their surface. This strengthens the cohesion of the main fiber bundle and also the thermoplastic fibers form a protective layer that protects the sensitive inorganic fibers.
  • a particularly dense, compact position of the fibers of the main fiber bundle can also be achieved by leading the combined fiber bundle through the heating zone with tension.
  • fiber-reinforced composite bodies which consist of a matrix with fiber insert
  • the adhesion between inorganic fibers and the matrix is often inadequate when the matrix material is under bending or tensile stress.
  • the advantage of the invention is that the fibers of the thermoplastic companion fiber bundle modify the surface of the main fiber bundle, the thermoplastic fibers imparting good adhesion.
  • composite materials whose matrix is a thermoset or thermoplastic It can e.g. are printed circuit boards, heat protection plates, grinding wheels and all fiber-reinforced plastic parts.
  • the drawing shows schematically an apparatus for performing the method.
  • a chemical fiber bundle is treated as an inorganic, multifilament thread.
  • the glass fiber bundle 2 is unwound from the supply spool 1.
  • the supply spool is driven on its circumference by a drive roller 3 with a drive motor 4.
  • the glass fiber bundle 2 then passes through the delivery unit 5 and then through a humidification device 11.
  • the glass fiber bundle can be impregnated with water through the moistening device 11.
  • An accompanying fiber bundle 7 is drawn off overhead from the supply spool 6 by means of delivery unit 8.
  • a moistening device 12 connects to the delivery unit 8.
  • the accompanying fiber bundle can also be saturated with water in the moistening device 12.
  • the glass fiber bundle hereinafter also referred to as the main fiber bundle, is then guided into the texturing nozzle 10 together with the companion fiber bundle, which consists of thermoplastic material and withdrawn together from the texturing nozzle by means of delivery unit 13 as total thread 14 by delivery unit 13.
  • the entire thread is then passed through a convection heater 15.
  • the convection heating device 15 has above all a heating tube 16 through which the entire thread 14 is guided.
  • the heating tube 16 is heated from the outside.
  • the entire thread 14 is withdrawn from the heating device 15 by the delivery mechanism 17.
  • the entire thread 14 is then wound up into a bobbin 20.
  • the winding device is only shown schematically and consists of the drive roller 21, which drives the bobbin 20 on its circumference, a reversing thread shaft 18 and a traversing thread guide 19, which guides the entire thread back and forth along the bobbin, and a drive motor 22 for the drive roller 21. All driven parts of the device, that is to say the drive roller 3, the delivery mechanism 5, the delivery mechanism 8, the delivery mechanism 13, the delivery mechanism 17, the drive roller 21 can be driven at a selectable speed. Depending on the design of the respective drives, adjustable gears or adjustable frequency transmitters 9, 23, 24, 25, 26 are provided for this purpose.
  • the delivery mechanism 5 prevents the resulting fluctuations in the tensile force of the glass fiber bundle 2 from continuing into the texturing nozzle 10.
  • the speed ratio between the delivery unit 5 in front of the texturing nozzle and the delivery unit 13 behind the texturing nozzle sets the thread tension with which the glass fiber bundle 2 is guided through the texturing nozzle 10.
  • the glass fiber bundle which is the main fiber bundle
  • the texturing nozzle 10 under relatively great tension. This prevents the air forces which act on the main fiber bundle in the texturing nozzle 10 from increasing Deformation of the filaments. This is advantageous because the inorganic fibers of the main fiber bundle are not very suitable for absorbing transverse forces. It is therefore important that they essentially maintain their alignment in the longitudinal direction of the thread.
  • the speed ratio between the delivery unit 8 in front and the delivery unit 13 behind the texturing nozzle determines the thread tension with which the thermoplastic accompanying thread 7 is guided into the texturing nozzle 10 and mixed with the main fiber bundle 2.
  • the delivery speed of the delivery unit 8 is preferably greater than the take-off speed of the delivery unit 13. This ensures that the filaments of the accompanying fiber bundle are subjected to a change of place by the air forces and form arches which penetrate the main fiber bundle. With an even greater delivery speed 8 relative to the take-off speed 13, it is also achieved that the air forces also lead to the filaments of the accompanying fiber bundle forming loops, loops which penetrate the main fiber bundle.
  • the delivery ratio of the delivery speed 8 to the take-off speed 13
  • the texturing nozzle 10 can be a swirling nozzle, as is usually used for the production of air-textured yarns (exemplary embodiments, for example in: “Textile Practice” 1969, p. 515 (Lünensch Stamm et al .: “Texturing of chemical threads in an air stream”)).
  • Tangel nozzle which is only used to make knots.
  • Exemplary embodiments of such nozzles result, for example, from CH-A-415 939 (DuPont).
  • the entire thread 14 is removed from the texturing zone by the delivery mechanism 13 at a uniform speed.
  • the main thread is preferably fed into the texturing zone with only a small overdelivery, which is between 0 and 5%.
  • the thermoplastic thread has a tradition between 10 and 100%. Because the glass thread runs fairly tight through the texturing nozzle 10, the air forces are not sufficient to completely dissolve the glass thread. Rather, only the outer filaments cause changes of place. The consequence of this is that the filaments of the thermoplastic accompanying thread are only interwoven or blown in any other way with these glass filaments which change places. The filaments of the thermoplastic accompanying thread therefore lay around the glass thread in the manner of a sheath.
  • the speed ratio between the feed mechanism 13 and the feed mechanism 17 determines the thread tension of the entire thread in the heating tube 16.
  • the temperature of the heating tube 16 is set so high that the polymer of the companion fiber bundle at least shrinks, preferably also softens. Due to the heat shrinkage of the polymer, the fiber pieces of the filaments of the companion fiber bundle, which lie transversely to the thread axis, i.e. the loops, loops, arches and the like, compact the outer cross section of the entire thread. At the same time, especially the filament pieces that protrude beyond the outer surface of the entire thread are softened. As a result, these filament pieces permanently bind the filaments of the main fiber bundle. Furthermore, the vibrations of the entire fiber bundle in the heating tube result in contact with the heating tube 16 on all areas of the circumference of the entire fiber bundle.
  • the polymer filaments projecting beyond the circumference of the overall thread come to the surface of the Total thread "ironed". This also increases the involvement. It cannot be ruled out and it is not only harmless, but in special cases it is also desirable that the temperature of the heating tube is so high that the polymer filament pieces that protrude above the surface of the entire thread melt.
  • the temperature of the heating tube can also be above the melting temperature of the polymer. It must only be avoided that the polymer is destroyed by the action of temperature.
  • the entire fiber bundle is led through the heating tube with a relatively high tension. This means that the take-off speed of the feed mechanism 17 is slightly higher, equal or slightly less than the feed speed of the feed mechanism 13. If the feed mechanism 13 is advanced by 0 to 5%, it is still ensured that the entire thread is under sufficient tension, whereby the shrinking forces can have an impact especially in the transverse direction.
  • the invention has the advantage over the known air jet treatment of the glass fiber bundle that the glass fiber bundle does not participate or only takes part to a small extent in the change of location. Therefore, in contrast to the known air jet treatment, there is little or no loss of strength.
  • Inorganic e.g. Glass threads that have a kind of sheath made of thermoplastic material. They are therefore very suitable for further processing and have a good connection to the material matrix, especially in fiber-reinforced materials. When manufacturing sheet-like structures such as fabrics or the like, it is possible to wash out the polymer component again using solvents.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Nonwoven Fabrics (AREA)
  • Inorganic Fibers (AREA)
  • Woven Fabrics (AREA)

Claims (5)

  1. Procédé de fabrication d'un fil multifilaire inorganique en liant les fibres inorganiques, en particulier des fibres de verre, des fibres de carbone, des fibres métalliques, d'un paquet principal de fibres au moyen d'un paquet secondaire de fibres composé de filaments thermoplastiques, caractérisé en ce que le paquet principal de fibres est amené avec le paquet secondaire de fibres non tendu à travers la zone de tourbillonnement d'une buse à gaz et y est soumis à des jets de gaz et/ou à un tourbillon de gaz de manière telle que des fibres du paquet secondaire de fibres pénètrent par morceaux sous la forme de lacets, de boucles, d'arcs et analogues dans le paquet principal et soient mélangées au paquet principal de fibres et en ce que le paquet de fibres combiné est ensuite chauffé à une température suffisante pour ramollir le paquet secondaire de fibres.
  2. Procédé selon la revendication 1, caractérisé en ce que le paquet principal de fibres est amené à travers la zone de tourbillonnement en étant tendu.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le paquet de fibres combiné est amené dans la zone de chauffage en étant tendu.
  4. Matériau composite renforcé par fibres, caractérisé par des fils de renforcement qui sont composés d'un paquet principal de fibres multifilaires inorganiques qui est lié à un paquet secondaire de fibres thermoplastiques de manière telle que les fibres du paquet secondaire de fibres pénètrent dans le paquet principal de fibres sous la forme de lacets, de boucles, d'arcs et analogues et soient mélangées au paquet principal de fibres et en ce que des fibres du paquet secondaire de fibres se trouvent à la surface du paquet principal de fibres sous forme de lacets, de boucles, d'arcs et analogues et l'entourent.
  5. Procédé de fabrication d'un corps composite renforcé par fibres, caractérisé par l'utilisation d'un fil de verre, d'un fil de carbone, d'un fil métallique fabriqué selon les revendications 1 à 3.
EP89109563A 1988-06-01 1989-05-26 Procédé de fabrication d'un fil multifilamentaire inorganique Expired - Lifetime EP0344650B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818606A DE3818606A1 (de) 1988-06-01 1988-06-01 Verfahren zum herstellen eines multifilen, anorganischen fadens
DE3818606 1988-06-01

Publications (3)

Publication Number Publication Date
EP0344650A2 EP0344650A2 (fr) 1989-12-06
EP0344650A3 EP0344650A3 (en) 1990-09-26
EP0344650B1 true EP0344650B1 (fr) 1992-12-02

Family

ID=6355589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109563A Expired - Lifetime EP0344650B1 (fr) 1988-06-01 1989-05-26 Procédé de fabrication d'un fil multifilamentaire inorganique

Country Status (3)

Country Link
EP (1) EP0344650B1 (fr)
DE (2) DE3818606A1 (fr)
ES (1) ES2036297T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013946A1 (de) * 1990-04-30 1991-10-31 Hoechst Ag Verwirbeltes multifilamentgarn aus hochmodul-einzelfilamenten und verfahren zum herstellen eines solchen garnes
EP0579082B1 (fr) * 1992-07-10 1998-08-26 Hoechst Aktiengesellschaft Méthode pour le traitement thermique de fils en mouvement et dispositif pour effectuer ce traitement
EP0586951B1 (fr) * 1992-08-26 1999-10-06 Hoechst Aktiengesellschaft Fil à deux composants bouclé de titre fin et à haute résistance, procédé de sa production et l'utilisation comme fil à coudre et fil à broder
EP1108806A1 (fr) * 1999-12-14 2001-06-20 Andreas Bodmer Texturation par jet d'air ou entrelacement pneumatique de fil hybride multifilament ou monofilament
DE102020105167A1 (de) 2020-02-27 2021-09-02 Thüringisches Institut für Textil- und Kunststoff-Forschung e. V. Rudolstadt Verfahren zur Herstellung eines Hybridgarnes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB916293A (en) * 1960-07-26 1963-01-23 British Nylon Spinners Ltd Improvements in or relating to the production of core yarns
US2985995A (en) * 1960-11-08 1961-05-30 Du Pont Compact interlaced yarn
FR1302030A (fr) * 1961-07-26 1962-08-24 British Nylon Spinners Ltd Perfectionnements à la fabrication de fils à âme

Also Published As

Publication number Publication date
EP0344650A3 (en) 1990-09-26
DE58902859D1 (de) 1993-01-14
ES2036297T3 (es) 1993-05-16
EP0344650A2 (fr) 1989-12-06
DE3818606A1 (de) 1989-12-14

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