WO2016087503A1 - Demi-produit textile - Google Patents

Demi-produit textile Download PDF

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Publication number
WO2016087503A1
WO2016087503A1 PCT/EP2015/078333 EP2015078333W WO2016087503A1 WO 2016087503 A1 WO2016087503 A1 WO 2016087503A1 EP 2015078333 W EP2015078333 W EP 2015078333W WO 2016087503 A1 WO2016087503 A1 WO 2016087503A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
textile
product according
thermoplastic
reinforcing
Prior art date
Application number
PCT/EP2015/078333
Other languages
German (de)
English (en)
Inventor
Norbert Brunk
Roy GLUTHMANN
Egon Gründig
Original Assignee
Hermes Schleifkörper Gmbh
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 Hermes Schleifkörper Gmbh filed Critical Hermes Schleifkörper Gmbh
Priority to EP15808128.1A priority Critical patent/EP3227484A1/fr
Priority to CN201580066011.2A priority patent/CN107208334A/zh
Publication of WO2016087503A1 publication Critical patent/WO2016087503A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
    • D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/10—Open-work 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
    • 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
    • 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
    • D10B2403/02412—Fabric incorporating additional compounds enhancing mechanical properties including several arrays of unbent yarn, e.g. multiaxial 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 a textile semi-finished product, with at least one reinforcing layer, which stretched substantially ver ⁇ current, as a standing threads and / or as a full shot (parallel shot) formed filaments or groups of filaments, and in holding at least one individual threads or thread groups connecting thread, the mesh forms.
  • thermoplastic fiber composite structures which are produced by pressing under the influence of temperature. Thereby melting the thermoplastic matrix component and combines with the United ⁇ reinforcement layers to a high-strength composite material.
  • This manufacturing process is used for a large number of industrial parts produced in large series, in particular for those in shipbuilding, aircraft construction and vehicle construction.
  • Layers are each formed of juxtaposed, not interwoven threads and in these layers, a matrix component is introduced. This may con- sist of thermoplastic ⁇ plastic or thermosetting resin, metal or ceramic and advertising introduced in the form of threads, tapes, sheet-like layers, woven or nonwoven materials the. Finally, the reinforcing layers and the matrix components are sewn together.
  • DE 10 2008 063 545 A1 discloses a multiaxial fabric consisting of several layers of fiber strands. These run in a straight line and parallel to each other and have a different orientation in each position.
  • the fiber strands can consist of reinforcing fibers or thermoplastic threads or of mixtures of the same and are connected to one another by thermoplastic connecting threads. Because the thermoplastic tie yarns are made of the same material as the matrix precursor component, they both melt into a unitary composite material. Thus, the fiber composite material produced in the ⁇ se ne contains by no more connecting threads.
  • the invention is based on the object to provide a semi-textile ⁇ zeug of the type mentioned, from which can be produced composite structures with high strength and defined properties.
  • thermo ⁇ plastic matrix thread is provided which is fixed by stitches of the connecting thread and deflected thereto.
  • An inventive textile semi-finished product is a Halbfertigpro ⁇ domestic product, from which can be manufactured in a fiber composite workpiece or -Material under the action of pressure and / or temperature with melting thermoplastic constituents.
  • the reinforcing layer gives the semifinished product and a workpiece produced therefrom strength, in particular tensile strength in the axial direction of the elongated individual threads or suture courses. These are stretched and can thus absorb high tensile forces.
  • the semi-finished product according to the invention is thus not a woven fabric, but preferably a knitted fabric.
  • the elongated monofilaments or filament bundles are inventively formed as standing threads and / or as a full shot (parallel shot) from ⁇ .
  • the term Stehfaden is a technical term known from the terminology of warp knitting and refers to a linearly extending in the longitudinal direction, between two wales incorporated thread line without limitation by stitches or handles thereof.
  • the term full shot or parallel shot refers in transverse or oblique direction duri ⁇ fende thread sections that are not limited by meshes of the same thread. As a full shot the thread line runs over the entire width of the knitted fabric.
  • a group of threads usually comprises a plurality of individual threads, which may be the same or different and may consist of different materials in order to a total of a plurality of characteristics embossed by the respective thread materials properties.
  • the connecting thread holds monofilaments or thread bundles and connects them. Holding means that the connection thread at least contributes to the threads in question are spatially fixed to each other or be ⁇ limited in their freedom of movement.
  • the connecting thread pierces neither individual threads nor a group of threads and thus can not weaken their structure and strength.
  • the connecting thread can in particular cover and / or wrap around threads and thus contribute to the holding function.
  • the connecting thread can perform the holding function alone or in cooperation with other thread systems.
  • the connecting thread forms stitches.
  • the basic textile structure of a semifinished product according to the invention is that of a warp knitted fabric. Warp knitted fabrics are familiar to the person skilled in the art and are preferably produced on so-called Raschel machines for this application.
  • the inventively provided matrix thread is thermoplas ⁇ table.
  • the term thermoplastic is to be understood in the context of the invention as the property of a fabric or a thread material to melt in the course of further processing of the semifinished product under pressure and / or temperature to produce a composite.
  • the matrix thread completely or partially loses its thread structure and merges into a matrix material that binds and / or embeds the reinforcing fibers.
  • Suitable thermoplastic mate ⁇ materials preferably melt at temperatures between 150 and 300 ° C.
  • Suitable are thermoplastic polymers such. As polyester, polyamide or polypropylene. These materials can be introduced in all usual in textile technology and suitable for processing filamentary designs.
  • the reinforcing fibers or the filaments of the reinforcing layer do not melt under the processing conditions, or at most only to a small extent, substantially retain their shape and structure, thus causing the fiber reinforcement of the resulting fiber composite structure.
  • thermoplastic matrix thread is fixed by stitches of the connecting thread and deflected there. This means that the matrix thread in the warp knit is defined positio ⁇ ned.
  • the matrix thread can thus be selectively arranged so that it is at the desired location during melting and gives the desired effect, for example the defined and targeted embedding and / or bonding of two or more reinforcing layers arranged one above the other.
  • the state of the art is based on webs or nonwovens of reinforcing fibers, which are often unstable and materially inhomogeneous (for example with respect to the fiber density) and can lead to properties varying in properties in the finished product. Also, it may be problematic due to these fluctuations, the fibers largely largely and uniformly admit ⁇ bind in a thermoplastic matrix component. Incompletely wetted or penetrated by the matrix component fibers often form defects and starting ⁇ points for structural breaks or cracks in the composite material.
  • the reinforcing fibers of connecting threads are needled or sewn, while a bundle of threads forming a unit in principle can be pierced and weakened in their structure.
  • thermoplastic matrix filaments so that these are fixed by loops of thread compound thereto and vice ⁇ deflected causes a defined and uniform positioning of the arrangement and which melt the matrix material relative to the reinforcing layers and the fiber sheets.
  • a homogeneous matrix can form during the melting, which ensures a reliable and complete covering of all reinforcing fibers or threads by means of short flow paths.
  • the textile semifinished product has a reinforcing layer.
  • thermoplastic matrix thread in addition to the at least one thermoplastic matrix thread has a second, substantially parallel to the threads of the reinforcing layer extending thermoplastic thread, wherein the thermoplastic matrix thread between the reinforcing layer and the second thermoplastic thread runs.
  • the textile semifinished product has at least two reinforcement layers which run in planes which are substantially parallel to one another.
  • the filaments of these two reinforcing layers may be substantially parallel to each other when particularly high uniaxial strength in one direction is desired.
  • the yarns from we ⁇ juris two of the reinforcement layers to one another enclose an angle, preferably substantially orthogonal to each other ⁇ . In this way one obtains a biaxial structure with high strength in different directions.
  • At least one thermoplastic matrix thread runs between two planes of reinforcing layers. This causes the two reinforcing layers do not rest directly on each other, but rather they each have contact with the matrix thread and can be particularly homogeneously incorporated into the matrix material during melting. At least one thermoplastic matrix ⁇ plastic thread can be inventively designed as part of income.
  • thermoplastic matrix thread is preferably guided predominantly through intersection regions of yarn bundles of the at least two reinforcing layers. This causes just takes place when Aufschmel ⁇ zen in these intersection regions a good connection and embedding of the threads into the matrix in the area of the important for the structural strength of crossing points.
  • the connecting thread may also be formed thermoplastic and melt completely or partially in the course of further processing of the semifinished product into a composite workpiece. It can then be It can be It can be It can be seen that the melting temperatures of the thermoplastic matrix thread and the thermoplastic connecting thread differ from each other.
  • the melting temperature of the thermoplastic compound yarn is less than that of the thermoplastic matrix ⁇ plastic thread. In this way, melting of the connecting thread can first be achieved with a corresponding temperature control, the thermoplastic matrix thread being retained in its shape.
  • the composite of the yarn layer dissolves and the threads can in the sense of improved flexibility and adaptability to the
  • thermoplastic matrix thread takes place at a higher temperature and the textile structure has significantly lower stresses at this point in time.
  • thermoplasti ⁇ shear connecting thread has to be chosen, the melting temperature exceeds the melting temperature of the matrix yarn.
  • thermoplastic matrix thread between the mesh of the connecting thread partially rectilinear
  • the individual threads or bundles of threads contain fibers selected from the group consisting of glass fibers, carbon fibers, basalt fibers, high-strength polymer fibers and mixtures thereof.
  • the fibers or filament bundles are processed with commercially available textile machines.
  • the invention further fiber composite workpieces or -Werkstoffe, obtainable by heating and forming a textile semi-finished product according to the invention.
  • these workpieces have a materially and mechanically homogeneous structure and can be reliably reproduced. Random strength losses due to heavily or less heavily damaged reinforcement layers or variations in the thermoplastic matrix content can largely be ruled out.
  • Figures 1-3 Schematically the structure of three
  • FIG. 1 shows a semifinished product according to the invention with two reinforcing layers arranged one above the other, namely warp threads and weft threads. These are formed from rectilinear and stretched, formed as standing threads 2 or as a full shot (parallel shot) 4 filaments or yarn sheets 2, 4. They are approximately orthogonal to each other and together form the reinforcing structure.
  • thermoplastic yarn 3 forms the thermoplastic matrix ⁇ component. He always runs between warp and weft thread, partially wraps around the stitches of the connecting thread 1 and is thereby fixed, but also deflected. Depending on machine NEN adjustment and choice of stitching, the course between the deflection points can be straight or curved, furthermore, the length between these points can be varied. Thereby, and by means of the choice of the fineness of the matrix thread, the proportion of matrix component can be varied and thus adapted to the requirements of the intended specific use.
  • the present embodiment forms a stable, largely distortion-free, consisting of exactly positioned textile elements multi-layer composite. It enables Drapie ⁇ ren in three-dimensional shapes and during the melting a good sliding of the reinforcement layers independently.
  • Raschelmaschinen are suitable with Magazinschuss issued and at least 3 guide bars, wherein a guide bar forms stitches.
  • the product shown in FIG. 1 was produced on a Raschel machine with weft insertion RS2 (3) MSUN 150 "18E year 1993 of the company Karl Mayer Textilmaschinenfabrik GmbH.
  • Guide bar 1 knitting thread connecting thread
  • Guide bar 2 reinforcement roving, textile glass 300 tex
  • Basis weight of the semi-finished textile product approx. 642 g / m 2
  • thermoplastic matrix thread (L3) By opposing LI (guide bar 1) to L3, the thermoplastic matrix thread (L3) is caught by the knitting line (LI) so as to be under 2 reinforcing rovings of the L2, covering a reinforcing roving in the weft per change of direction.
  • a change of direction of the thermoplastic Ma ⁇ trixfadens (L3) is always after the completion of a mesh ⁇ row instead. Due to the arrangement of the guide bar L3 of the thermoplastic matrix thread is always placed between the reinforcement rovings ⁇ L2 and the shot Verstärkungsrovings.
  • the knitting thread of the guide bar LI connects the reinforcement rovings (L2 and weft) and the thermoplastic matrix thread (L3) into a flat structure. Due to the selected machine and raw material parameters, a fiber volume fraction of the reinforcing fibers of approx. 40% can be achieved in the textile semi-finished product.
  • FIG. 2 Darge ⁇ represents. In comparison to the structure shown in FIG. 1, an additional thermoplastic thread is introduced in the warp direction 5. As a result, the proportion of thermoplastic material can be increased independently of the thermoplastic matrix thread 3 as part shot.
  • the reinforcing fiber strand in the warp direction 2 runs approximately at right angles to the reinforcing fiber strand in the weft direction 4, wherein both fiber strands are fixed by the connecting thread 1 which is thermoplastic in this embodiment. Since the additional thermoplastic thread 5 is held by the thermoplastic matrix thread 3 between the reinforcing strand in the weft 4 and the reinforcing strand in the warp direction 2, a reliable penetration of the reinforcing layers with thermoplastic material is ensured at their crossing points.
  • thermoplastic yarn 3 extends as a matrix component Zvi ⁇ rule the reinforcing fiber strands. Because the thermoplastic connecting thread 1 does not fix the reinforcing fiber strand 6, another thermoplastic thread 7 is introduced as a partial weft.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Reinforced Plastic Materials (AREA)
  • Woven Fabrics (AREA)

Abstract

L'invention concerne un demi-produit textile comprenant au moins une couche de renforcement qui possède des fils individuels ou des portées de fil (2, 4, 6) qui s'étendent sensiblement tendus, et comprenant au moins un fil de jonction (1) maintenant les fils individuels ou des portées de fil, lequel forme des mailles. Selon l'invention, il existe au moins un fil de matrice thermoplastique (3) qui est fixé par les mailles du fil de jonction (1) et qui change de direction sur celui-ci.
PCT/EP2015/078333 2014-12-03 2015-12-02 Demi-produit textile WO2016087503A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15808128.1A EP3227484A1 (fr) 2014-12-03 2015-12-02 Demi-produit textile
CN201580066011.2A CN107208334A (zh) 2014-12-03 2015-12-02 纺织半成品

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14196134 2014-12-03
EP14196134.2 2014-12-03

Publications (1)

Publication Number Publication Date
WO2016087503A1 true WO2016087503A1 (fr) 2016-06-09

Family

ID=52102467

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/078333 WO2016087503A1 (fr) 2014-12-03 2015-12-02 Demi-produit textile

Country Status (3)

Country Link
EP (1) EP3227484A1 (fr)
CN (1) CN107208334A (fr)
WO (1) WO2016087503A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336230A1 (fr) * 2016-12-19 2018-06-20 Tietex International Ltd. Produits renforcés de manière directionnelle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304345A1 (de) * 1983-02-09 1984-08-16 Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen Kettenwirkmaschine mit verstaerkungsfaeden
EP0383953A1 (fr) * 1988-09-02 1990-08-29 Gunze Limited Procédé pour le façonnement thermique et tricot à utiliser dans un tel procédé
WO2002057527A1 (fr) * 2001-01-19 2002-07-25 Bae Systems Plc Tissus sans frisures
WO2007014145A1 (fr) * 2005-07-25 2007-02-01 Nfa Corporation Guide-broche tricote avec maille de blocage servant de support a un profile d'etancheite

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692777A (en) * 1995-04-27 1997-12-02 Minnesota Mining And Manufacturing Company Low permeability inflatable restraint fabric
US5795835A (en) * 1995-08-28 1998-08-18 The Tensar Corporation Bonded composite knitted structural textiles
AU7944998A (en) * 1998-05-15 1999-12-20 Eng-Tex Ab Laid-yarn fabric
CN103572493A (zh) * 2012-07-27 2014-02-12 东莞超盈纺织有限公司 用以制造超强抗疲劳弹性织物的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304345A1 (de) * 1983-02-09 1984-08-16 Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen Kettenwirkmaschine mit verstaerkungsfaeden
EP0383953A1 (fr) * 1988-09-02 1990-08-29 Gunze Limited Procédé pour le façonnement thermique et tricot à utiliser dans un tel procédé
WO2002057527A1 (fr) * 2001-01-19 2002-07-25 Bae Systems Plc Tissus sans frisures
WO2007014145A1 (fr) * 2005-07-25 2007-02-01 Nfa Corporation Guide-broche tricote avec maille de blocage servant de support a un profile d'etancheite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3227484A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336230A1 (fr) * 2016-12-19 2018-06-20 Tietex International Ltd. Produits renforcés de manière directionnelle

Also Published As

Publication number Publication date
EP3227484A1 (fr) 2017-10-11
CN107208334A (zh) 2017-09-26

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