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EP0390025A2 - Sewing thread made from polyetherketone - Google Patents

Sewing thread made from polyetherketone Download PDF

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Publication number
EP0390025A2
EP0390025A2 EP90105692A EP90105692A EP0390025A2 EP 0390025 A2 EP0390025 A2 EP 0390025A2 EP 90105692 A EP90105692 A EP 90105692A EP 90105692 A EP90105692 A EP 90105692A EP 0390025 A2 EP0390025 A2 EP 0390025A2
Authority
EP
European Patent Office
Prior art keywords
twist
din
sewing
thread
sewing thread
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
EP90105692A
Other languages
German (de)
French (fr)
Other versions
EP0390025A3 (en
EP0390025B1 (en
Inventor
Hermann Dr. Buchert
Rainer Dr. Neuberg
Hans Georg Dr. Matthies
Karl-Heinz Butzheinen
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BASF SE
Original Assignee
BASF SE
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Priority to AT90105692T priority Critical patent/ATE101664T1/en
Publication of EP0390025A2 publication Critical patent/EP0390025A2/en
Publication of EP0390025A3 publication Critical patent/EP0390025A3/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/66—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyethers
    • 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
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/46—Sewing-cottons or the like
    • 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
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/06—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers
    • D10B2331/061—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers polyetherketones, polyetheretherketones, e.g. PEEK
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]

Definitions

  • the invention relates to sewing thread made from at least one multifilament thread whose twisted individual filaments consist of a thermoplastic material.
  • Sewing threads made from aromatic polyamide have a higher temperature resistance.
  • their production is quite complex; in addition, their mechanical properties are determined by the manufacturing process (solution spinning), so that they are variable only within narrow limits and cannot be adapted to changing requirements. In addition, they are very difficult to dye. Such sewing threads have therefore not become very important in practice.
  • polyether ketones melt as fibers into fibers and can then be stretched.
  • a suitable spinning process is e.g. in EP-A-202 082.
  • the multifilament yarns obtained have a wide range of properties.
  • the individual titer is between 2.8 and 100 denier (corresponding to 2.5 to 90 dtex) and the elongation at break can be 15 to 200%.
  • sewing threads can be produced from such fibers and which multifilament threads are particularly well suited for this.
  • the object of the invention was to develop thermoplastic-based sewing threads which have a tear strength, elongation at break and dyeability equal to polyester and which are also resistant to hydrolysis and solvents and which permit high sewing speeds even with modern sewing machines.
  • thermoplastic is a polyether ketone and the multifilament yarn has a single filament titer (according to DIN 53 830) of 1.0 to 10 dtex, an elongation at break (according to DIN 53 815) of 3 to 30% and a boiling shrinkage ( according to DIN 53 866) of less than 10%.
  • the sewing threads according to the invention have good mechanical properties, such as tensile strength, modulus of elasticity and elongation at break, and low shrinkage, and also excellent resistance to acids, alkalis and solvents.
  • the good heat resistance which allows high sewing speeds, is particularly advantageous.
  • Suitable thermoplastics are polyether ketones, preferably high molecular weight polymers with a relative viscosity, measured 0.5% in 96% sulfuric acid at 25 ° C. of more than 1.0, preferably more than 1.3.
  • Preferred polyether ketones are those with the structural units
  • Copolymers are also suitable in which up to 50% of the -CO groups by -SO2 groups or are replaced.
  • multifilament yarns are particularly suitable for the production of sewing threads which have a single filament titer (according to DIN 53 830) between 1.0 and 10, in particular between 1.5 and 6 dtex and their elongation at break (according to DIN 53 815) 3 to 30%, in particular 5 to 20%.
  • the tensile strength of the yarn should preferably be between 4 and 10 cN / dtex.
  • Their shrinkage, measured in boiling water according to DIN 53 866, should be less than 10%, preferably less less than 2%.
  • the heat shrinkage at 180 ° C. should preferably be below 20%, in particular below 8%.
  • the multifilament yarns preferably consist of 10 to 1000, in particular 20 to 300 individual filaments.
  • the multifilament yarns are preferably drawn immediately after the spinning process, the drawing ratio advantageously being between 1.5 and 5.
  • the multifilaments can also be brought to the required high strengths and low elongation at break values in a rapid spinning process using high winding speeds.
  • the sewing threads according to the invention are produced in the usual way from these multifilament threads.
  • a twisted multifilament thread can already be used as a sewing thread.
  • the direction of rotation S / Z is preferred for pre-twisting and untwisting.
  • the ratio of ⁇ to ⁇ from front is expediently chosen so that the finished sewing thread is balanced udn kringel free.
  • the twist (according to DIN 53 832) is defined by the equation where T / m means the turns per m.
  • the sewing threads according to the invention can be given the usual processing preparations during the spinning process, for example lubricants such as mineral oils, ester oils and alkylene oxide adducts; Emulsifiers such as soaps and ionic or nonionic surface-active substances; also antistatic agents such as phosphoric acid esters of ethoxylated fatty alcohols and ethoxylated fatty acid derivatives. They can also be subsequently equipped with paraffins, paraffin waxes or silicone waxes to improve the sliding properties.
  • lubricants such as mineral oils, ester oils and alkylene oxide adducts
  • Emulsifiers such as soaps and ionic or nonionic surface-active substances
  • antistatic agents such as phosphoric acid esters of ethoxylated fatty alcohols and ethoxylated fatty acid derivatives.
  • paraffins, paraffin waxes or silicone waxes to improve the sliding properties.
  • a particular advantage of using polyether ketone fibers is that the sewing threads can also be processed without heat equipment.
  • the melt spinning apparatus consisted of a single-shaft extruder with 3 el. Heated heating zones, an electrically heated spinneret with 30 holes with a diameter of 0.4 mm, spinning pump (gear type), post-heating zone, blow chute and winding device.
  • the heating zones of the extruder and the spinning head were set to a temperature such that the melt reached a temperature of 415 ° C.
  • the throughput was 1.6 kg / h.
  • the threads passed through an electrically heated post-heater and an air-operated blowing shaft. They were drawn off at a winding speed of 850 m / min and then drawn in a ratio of 1: 3.0, the godet of the drawing device being heated to a temperature of 130 ° C. and the heating plate in the drawing field to 250 ° C.
  • the threads had the following properties: Total titre: 109/30 dtex Individual titer: 3.6 dtex Tear resistance: 5.4 cN / dtex Elongation at break: 11.4% Cooking shrinkage: 0.5% Hot air shrinkage: 3.5% Modulus of elasticity: 45.1 cN / dtex
  • Example 2 A polyether ketone with the repeating units and a relative solution viscosity of 1.98 was spun in the apparatus described in Example 1.
  • the temperature of the melt was 375 ° C.
  • the spinneret had 30 holes, each 0.3 mm in diameter, and the winding speed was 700 m / min at a throughput of 1.2 kg / h.
  • the spun threads were then hot drawn in a ratio of 1: 2.9 at temperatures of 160 or 210 ° C and then had the following properties: Total titre: 110/30 dtex Individual titer: 3.7 dtex Tear resistance: 5.9 cN / dtex Elongation at break: 14.0% E-module: 68.0 cN / dtex Cooking shrinkage: 2.0% Hot air shrinkage (180 ° C): 5.0%
  • a multifilament yarn according to example A2 is wound in parallel on a high-speed winding machine on disc spools.
  • 3 of these disc spools are plugged onto the upper level of a thread-thread-twisting machine and first provided with a pre-wire in the S direction.
  • the 3 twisted multifilament yarns are folded and twisted three times in the Z direction by means of a ring spindle.
  • 530 turns per meter 3 Z, corresponding to ⁇ out 100, were selected for the subsequent unwrapping.
  • the sewing thread can be dyed using the customary dyeing processes, but at an elevated temperature in the range from 180 ° to 200 ° C.
  • the thermal properties of the present colored sewing thread are extraordinarily good due to the high melting point of 334 ° C for polyether ketone and a maximum temperature for continuous loading of 250 ° C. This would make it possible to dispense with special sewing thread equipment. For reasons of better sliding properties when pulling through the thread guide elements of the sewing machine and when pulling into the material, additional equipment is recommended.
  • silicone-containing waxes or emulsions are applied to the dyed sewing thread via a net roller, or other known finishing methods for sewing threads, e.g. Equipment used in the dyeing machine.
  • the sewing thread produced by this process has excellent sewing properties compared to conventional sewing thread. It was found in a sewing test that the sewing thread according to the invention has a seam length twice as long as that of breakage compared to polyester filament threads. The significantly better thermal and sewing properties are complemented by excellent hydrolysis resistance and resistance to chemicals, e.g. Hydrochloric acid, sulfuric acid, nitric acid, potassium hydroxide solution and trichlorethylene.
  • chemicals e.g. Hydrochloric acid, sulfuric acid, nitric acid, potassium hydroxide solution and trichlorethylene.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
  • Materials For Medical Uses (AREA)

Abstract

The invention relates to sewing thread made from a polyether ketone, prepared from multifilament yarn having a filament linear density of from 1.0 to 10 dtex, a breaking extension of 3 to 30% and a boil shrinkage of less than 10%.

Description

Die Erfindung betrifft Nähgarn aus mindestens einem Multifilamentgarn, dessen miteinander verzwirnte Einzelfilamente aus einem thermoplastischen Kunststoff bestehen.The invention relates to sewing thread made from at least one multifilament thread whose twisted individual filaments consist of a thermoplastic material.

Beim Nähen von technischen Materialien, wie Planen, Sitzbezügen, Glas­geweben, aber auch von Leder und Kunststoff, werden üblicherweise Garne auf Basis von Polyestern verwendet.When sewing technical materials such as tarpaulins, seat covers, glass fabrics, but also leather and plastic, yarns based on polyesters are usually used.

Solche Nähgarne haben jedoch den Nachteil, daß sie schon bei verhältnis­mäßig niedrigen Temperaturen schmelzen, so daß sie mit schnellaufenden Nähmaschinen, insbesondere mit Nähautomaten, wo bei abruptem Wechsel der Nähgeschwindigkeit die Nähgarne sehr heiß werden können, nur dann ver­arbeitbar sind, wenn sie eine besondere Ausrüstung haben. Außerdem weisen Polyesterfasern eine für viele Anwendungszwecke nicht ausreichende Hydro­lyse- und Lösungsmittelbeständigkeit auf.However, such sewing threads have the disadvantage that they melt even at relatively low temperatures, so that they can only be processed with high-speed sewing machines, in particular with automatic sewing machines, where the sewing threads can become very hot when the sewing speed changes abruptly if they have special equipment to have. In addition, polyester fibers are not sufficiently resistant to hydrolysis and solvents for many purposes.

Eine höhere Temperaturbeständigkeit haben Nähgarne aus aromatischem Poly­amid (Kevlar®). Ihre Herstellung ist jedoch recht aufwendig; außerdem sind ihre mechanischen Eigenschaften durch den Herstellprozeß (Lösungsspinnen) festgelegt, so daß sie nur in engen Grenzen variabel sind und wechselnden Anforderungen nicht angepaßt werden können. Darüber hinaus sind sie sehr schwer anfärbbar. Derartige Nähgarne haben daher in der Praxis keine große Bedeutung erlangt.Sewing threads made from aromatic polyamide (Kevlar®) have a higher temperature resistance. However, their production is quite complex; in addition, their mechanical properties are determined by the manufacturing process (solution spinning), so that they are variable only within narrow limits and cannot be adapted to changing requirements. In addition, they are very difficult to dye. Such sewing threads have therefore not become very important in practice.

Es ist bekannt, daß Polyetherketone als Schmelze zu Fasern vorsponnen und anschließend verstreckt werden können. Ein geeignetes Spinnverfahren ist z.B. in der EP-A-202 082 beschrieben. Die dabei erhaltenen Multifilament­garne weisen ein breites Eigenschaftsspektrum auf. So kann z.B. der Einzeltiter zwischen 2,8 und 100 denier (entsprechend 2,5 bis 90 dtex) liegen und die Bruchdehnung kann 15 bis 200 % betragen. Es findet sich jedoch keine Aussage darüber, daß aus derartigen Fasern Nähgarne hergestellt werden können und welche Multifilamentgarne dafür besonders gut geeignet sind.It is known that polyether ketones melt as fibers into fibers and can then be stretched. A suitable spinning process is e.g. in EP-A-202 082. The multifilament yarns obtained have a wide range of properties. For example, the individual titer is between 2.8 and 100 denier (corresponding to 2.5 to 90 dtex) and the elongation at break can be 15 to 200%. However, there is no statement that sewing threads can be produced from such fibers and which multifilament threads are particularly well suited for this.

Der Erfindung lag die Aufgabe zugrunde, Nähgarne auf Thermoplast-Basis zu entwickeln, die eine mit Polyester ebenbürtige Reißfestigkeit, Bruch­dehnung und Anfärbbarkeit aufweisen und darüber hinaus hydrolyse- und lösungsmittelbeständig sind und hohe Nähgeschwindigkeiten auch mit moder­nen Nähautomaten zulassen.The object of the invention was to develop thermoplastic-based sewing threads which have a tear strength, elongation at break and dyeability equal to polyester and which are also resistant to hydrolysis and solvents and which permit high sewing speeds even with modern sewing machines.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß der thermoplasti­sche Kunststoff ein Polyetherketon ist und das Multifilamentgarn einen Einzelfilamenttiter (nach DIN 53 830) von 1,0 bis 10 dtex, eine Bruch­dehnung (nach DIN 53 815) von 3 bis 30 % und einen Kochschrumpf (nach DIN 53 866) von weniger als 10 % aufweist.According to the invention, this object is achieved in that the thermoplastic is a polyether ketone and the multifilament yarn has a single filament titer (according to DIN 53 830) of 1.0 to 10 dtex, an elongation at break (according to DIN 53 815) of 3 to 30% and a boiling shrinkage ( according to DIN 53 866) of less than 10%.

Die erfindungsgemäßen Nähgarne weisen gute mechanische Eigenschaften, wie Reißfestigkeit, Elastizitätsmodul und Bruchdehnung sowie einen geringen Schrumpf auf, ferner eine ausgezeichnete Beständigkeit gegen Säuren, Laugen und Lösungsmittel. Von besonderem Vorteil ist die gute Hitzebestän­digkeit, die hohe Nähgeschwindigkeiten zuläßt.The sewing threads according to the invention have good mechanical properties, such as tensile strength, modulus of elasticity and elongation at break, and low shrinkage, and also excellent resistance to acids, alkalis and solvents. The good heat resistance, which allows high sewing speeds, is particularly advantageous.

Geeignete Thermoplaste sind Polyetherketone, vorzugsweise hochmolekulare Polymere mit einer relativen Viskosität, gemessen 0,5 %ig in 96 %iger Schwefelsäure bei 25°C von mehr als 1,0, vorzugsweise mehr als 1,3.Suitable thermoplastics are polyether ketones, preferably high molecular weight polymers with a relative viscosity, measured 0.5% in 96% sulfuric acid at 25 ° C. of more than 1.0, preferably more than 1.3.

Bevorzugte Polyetherketone sind solche mit den Struktureinheiten

Figure imgb0001
Preferred polyether ketones are those with the structural units
Figure imgb0001

Geeignet sind auch Copolymere, bei denen bis zu 50 % der -CO-Gruppen durch -SO₂-Gruppen oder der

Figure imgb0002
ersetzt sind.Copolymers are also suitable in which up to 50% of the -CO groups by -SO₂ groups or
Figure imgb0002
 are replaced.

Es hat sich gezeigt, daß zur Herstellung von Nähgarnen besonders solche Multifilamentgarne geeignet sind, die einen Einzelfilamenttiter (nach DIN 53 830) zwischen 1,0 und 10, insbesondere zwischen 1,5 und 6 dtex auf­weisen und deren Bruchdehnung (nach DIN 53 815) 3 bis 30 %, insbesondere 5 bis 20 % beträgt. Die Reißfestigkeit der Garne (nach DIN 53 815) soll vor­zugsweise zwischen 4 und 10 cN/dtex liegen. Ihr Schrumpf, gemessen in kochendem Wasser nach DIN 53 866 soll weniger als 10 %, vorzugsweise weni­ ger als 2 % betragen. Der Hitzeschrumpf bei 180°C soll vorzugsweise unter 20 %, insbesondere unter 8 %, liegen.It has been shown that multifilament yarns are particularly suitable for the production of sewing threads which have a single filament titer (according to DIN 53 830) between 1.0 and 10, in particular between 1.5 and 6 dtex and their elongation at break (according to DIN 53 815) 3 to 30%, in particular 5 to 20%. The tensile strength of the yarn (according to DIN 53 815) should preferably be between 4 and 10 cN / dtex. Their shrinkage, measured in boiling water according to DIN 53 866, should be less than 10%, preferably less less than 2%. The heat shrinkage at 180 ° C. should preferably be below 20%, in particular below 8%.

Die Multifilamentgarne bestehen vorzugsweise aus 10 bis 1000, insbesondere aus 20 bis 300 Einzelfilamenten. Die Multifilamentgarne werden bevorzugt gleich anschließend an den Spinnprozeß verstreckt, wobei das Verstreck­verhältnis zweckmäßigerweise zwischen 1,5 und 5 liegt. Man kann die Multi­filamente aber auch in einem Schnellspinnverfahren bei Anwendung hoher Aufspulgeschwindigkeiten direkt auf die geforderten hohen Festigkeiten und niedrigen Bruchdehnungswerte bringen.The multifilament yarns preferably consist of 10 to 1000, in particular 20 to 300 individual filaments. The multifilament yarns are preferably drawn immediately after the spinning process, the drawing ratio advantageously being between 1.5 and 5. However, the multifilaments can also be brought to the required high strengths and low elongation at break values in a rapid spinning process using high winding speeds.

Aus diesen Multifilamentgarnen werden die erfindungsgemäßen Nähgarne auf übliche Weise hergestellt. Dabei wird das Multifilamentgarn verzwirnt, wo­bei im Falle der Verwendung eines einzigen Multifiamentgarns (single twist) der Drall (nach DIN 53 832) zwischen α = 30 und 100, vorzugsweise zwischen α = 40 und 80 in z-Draht, liegen soll. Im Prinzip kann bereits ein derartig verdrehtes Multifilamentgarn als Nähgarn eingesetzt werden. Bevorzugt werden jedoch mindestens 2, vorzugsweise 2 bis 4 Multifilament­garne zu einem Nähgarn verzwirnt, wobei der Drall für den Vorzwirn zwischen αvor = 60 und 110, und der Drall für den entgegengesetzt zum Vorzwirn gedrehten Auszwirn zwischen αaus = 80 und 120 liegen sollte. Für den Vor- und Auszwirn ist die Drehrichtung S/Z bevorzugt. Das Verhältnis von αvor zu αaus wird dabei zweckmäßigerweise so gewählt, daß das fertige Nähgarn ausbalanciert udn kringelfrei ist.The sewing threads according to the invention are produced in the usual way from these multifilament threads. The multifilament yarn is twisted, the twist (according to DIN 53 832) should be between α = 30 and 100, preferably between α = 40 and 80 in z-wire, if a single multifilament yarn is used. In principle, such a twisted multifilament thread can already be used as a sewing thread. However, at least 2, preferably 2 to 4 multifilament yarns are preferably twisted to form a sewing thread, the twist for the pre-twist between α vor = 60 and 110, and the twist for the twist turned counter to the pre-twist should lie between α aus = 80 and 120. The direction of rotation S / Z is preferred for pre-twisting and untwisting. The ratio of α to α from front is expediently chosen so that the finished sewing thread is balanced udn kringel free.

Der Drall (nach DIN 53 832) ist definiert durch die Gleichung

Figure imgb0003
wobei T/m die Drehungen pro m bedeutet.The twist (according to DIN 53 832) is defined by the equation
Figure imgb0003
 where T / m means the turns per m.

Die erfindungsgemäßen Nähgarne können beim Spinnvorgang die üblichen Verarbeitungspräparationen erhalten, z.B. Schmiermittel, wie Mineralöle, Esteröle und Alkylenoxidaddukte; Emulgatoren, wie Seifen und ionische oder nichtionische oberflächenaktive Substanzen; ferner Antistatika wie Phos­phorsäureester von ethoxylierten Fettalkoholen und ethoxylierte Fettsäure­derivate. Sie können ferner anschließend mit Paraffinen, Paraffinwachsen oder Siliconwachsen zur Verbesserung der Gleiteigenschaften ausgerüstet werden.The sewing threads according to the invention can be given the usual processing preparations during the spinning process, for example lubricants such as mineral oils, ester oils and alkylene oxide adducts; Emulsifiers such as soaps and ionic or nonionic surface-active substances; also antistatic agents such as phosphoric acid esters of ethoxylated fatty alcohols and ethoxylated fatty acid derivatives. They can also be subsequently equipped with paraffins, paraffin waxes or silicone waxes to improve the sliding properties.

Ein besonderer Vorteil der Verwendung von Polyetherketon-Fasern besteht darin, daß die Nähgarne auch ohne Hitzeausrüstung verarbeitet werden können.A particular advantage of using polyether ketone fibers is that the sewing threads can also be processed without heat equipment.

BeispieleExamples A. Herstellung der MultifilamentgarneA. Manufacture of multifilament yarns

1. Ein Polyetherketon mit den wiederkehrenden Einheiten

Figure imgb0004
und einer relativen Lösungsviskosität von 1,478, gemessen in einer Lösung von 0,5 g Polymer in 100 ml 96 % H₂SO₄ bei 25°C, wurde konti­nuierlich einer Schmelzspinnapparatur zugeführt und aufgeschmolzen. Die Schmelzspinnapparatur bestand aus einem Einwellenextruder mit 3 el. beheizbaren Heizzonen, einer elektrisch beheizten Spinndüse mit 30 Löchern vom Durchmesser 0,4 mm, Spinnpumpe (Zahnradtyp), Nach­erhitzerzone, Blasschacht und Aufspulvorrichtung.1. A polyether ketone with the repeating units
Figure imgb0004
 and a relative solution viscosity of 1.478, measured in a solution of 0.5 g polymer in 100 ml 96% H₂SO₄ at 25 ° C, was continuously fed to a melt spinning apparatus and melted. The melt spinning apparatus consisted of a single-shaft extruder with 3 el. Heated heating zones, an electrically heated spinneret with 30 holes with a diameter of 0.4 mm, spinning pump (gear type), post-heating zone, blow chute and winding device.

Die Heizzonen des Extruders und des Spinnkopfes wurden auf eine Tem­peratur eingestellt, daß die Schmelze eine Temperatur von 415°C er­hielt. Der Durchsatz betrug 1,6 kg/Std. Die Fäden passierten einen elektrisch beheizten Nacherhitzer und einen mit Luft betriebenen An­blasschacht. Sie wurden mit einer Aufspulgeschwindigkeit von 850 m/min abgezogen und anschließend im Verhältnis 1:3,0 verstreckt, wobei die Einzugsgalette der Streckvorrichtung auf eine Temperatur von 130°C und die Heizplatte im Streckfeld auf 250°C erhitzt wurde. Die Fäden hatten folgende Eigenschaften:
Gesamttiter : 109/30 dtex
Einzeltiter : 3,6 dtex
Reißfestigkeit : 5,4 cN/dtex
Bruchdehnung : 11,4 %
Kochschrumpf : 0,5 %
Heißluftschrumpf: 3,5 %
E-Modul : 45,1 cN/dtexThe heating zones of the extruder and the spinning head were set to a temperature such that the melt reached a temperature of 415 ° C. The throughput was 1.6 kg / h. The threads passed through an electrically heated post-heater and an air-operated blowing shaft. They were drawn off at a winding speed of 850 m / min and then drawn in a ratio of 1: 3.0, the godet of the drawing device being heated to a temperature of 130 ° C. and the heating plate in the drawing field to 250 ° C. The threads had the following properties:
Total titre: 109/30 dtex
Individual titer: 3.6 dtex
Tear resistance: 5.4 cN / dtex
Elongation at break: 11.4%
Cooking shrinkage: 0.5%
Hot air shrinkage: 3.5%
Modulus of elasticity: 45.1 cN / dtex

2. Ein Polyetherketon mit den wiederkehrenden Einheiten

Figure imgb0005
und einer relativen Lösungsviskosität von 1,98 wurde in der in Bei­spiel 1 beschriebenen Apparatur versponnen. Die Temperatur der Schmelze betrug 375°C, die Spinndüse hatte 30 Löcher von jeweils 0,3 mm Durchmesser und die Spulgeschwindigkeit betrug 700 m/min bei einem Durchsatz von 1,2 kg/h. Die gesponnenen Fäden wurden anschließend im Verhältnis 1:2,9 bei Temperaturen von 160 bzw. 210°C heißverstreckt und hatten danach folgende Eigenschaften:
Gesamttiter : 110/30 dtex
Einzeltiter : 3,7 dtex
Reißfestigkeit : 5,9 cN/dtex
Bruchdehnung : 14,0 %
E-Modul : 68,0 cN/dtex
Kochschrumpf : 2,0 %
Heißluftschrumpf (180°C) : 5,0 %2. A polyether ketone with the repeating units
Figure imgb0005
 and a relative solution viscosity of 1.98 was spun in the apparatus described in Example 1. The temperature of the melt was 375 ° C., the spinneret had 30 holes, each 0.3 mm in diameter, and the winding speed was 700 m / min at a throughput of 1.2 kg / h. The spun threads were then hot drawn in a ratio of 1: 2.9 at temperatures of 160 or 210 ° C and then had the following properties:
Total titre: 110/30 dtex
Individual titer: 3.7 dtex
Tear resistance: 5.9 cN / dtex
Elongation at break: 14.0%
E-module: 68.0 cN / dtex
Cooking shrinkage: 2.0%
Hot air shrinkage (180 ° C): 5.0%

B. Herstellung der NähgarneB. Production of sewing threads

Ein Multifilamentgarn nach Beispiel A2 wird auf einer Schnellwinde­maschine auf Scheibenspulen parallel aufgewunden. Zur Herstellung eines 3fachen Filamentzwirnes werden 3 dieser Scheibenspulen auf die obere Etage einer Zwirn-Fach-Zwirn-Maschine aufgesteckt und zunächst in S-Richtung mit einem Vordraht versehen. Im weiteren Fadenverlauf werden die 3 hochgedrehten Multifilamentgarne gefacht und mittels einer Ringspindel 3fach in Z-Richtung verzwirnt. Für das vorliegende Beispiel wurden 700 Drehungen pro Meter S entsprechend einem Vordraht von αvor = 76 gewählt. Für den nachfolgenden Ausdraht wurden 530 Drehungen pro Meter 3 Z, entsprechend αaus = 100 gewählt.A multifilament yarn according to example A2 is wound in parallel on a high-speed winding machine on disc spools. To produce a triple filament thread, 3 of these disc spools are plugged onto the upper level of a thread-thread-twisting machine and first provided with a pre-wire in the S direction. In the further course of the thread, the 3 twisted multifilament yarns are folded and twisted three times in the Z direction by means of a ring spindle. For the present example, 700 turns per meter S were selected, corresponding to a pre-wire of α before = 76. 530 turns per meter 3 Z, corresponding to α out = 100, were selected for the subsequent unwrapping.

Aus dem so hergestellten Filamentzwirn werden anschließend Färbespulen auf einer Präzisions-Spulmaschine hergestellt. Entsprechend den thermischen Eigenschaften der Polyetherketone kann der Nähzwirn mit den üblichen Färbeverfahren, allerdings mit erhöhter Temperatur im Bereich von 180° und 200°C, gefärbt werden.From the filament thread thus produced, dyeing bobbins are then produced on a precision winder. Depending on the thermal properties of the polyether ketones, the sewing thread can be dyed using the customary dyeing processes, but at an elevated temperature in the range from 180 ° to 200 ° C.

Die thermische Eigenschaften des vorliegenden gefärbten Nähzwirns sind durch den hohen Schmelzpunkt für Polyetherketon von 334°C und einer Maximaltemperatur für Dauerbelastung von 250°C außergewöhnlich gut. Damit könnte auf eine spezielle Nähfadenausrüstung verzichtet werden. Aus Gründen der besseren Gleiteigenschaften beim Durchzug durch die Fadenleitelemente der Nähmaschine und beim Einzug in das Nähgut empfiehlt sich jedoch eine zusätzliche Ausrüstung. In diesem Falle werden auf den gefärbten Nähzwirn über eine Netzwalze silikonhaltige Wachse oder Emulsionen appliziert oder es werden andere bekannte Ausrüstungsverfahren für Nähgarne, z.B. Ausrüstung im Färbeapparat angewandt.The thermal properties of the present colored sewing thread are extraordinarily good due to the high melting point of 334 ° C for polyether ketone and a maximum temperature for continuous loading of 250 ° C. This would make it possible to dispense with special sewing thread equipment. For reasons of better sliding properties when pulling through the thread guide elements of the sewing machine and when pulling into the material, additional equipment is recommended. In this case, silicone-containing waxes or emulsions are applied to the dyed sewing thread via a net roller, or other known finishing methods for sewing threads, e.g. Equipment used in the dyeing machine.

Der nach diesem Verfahren hergestellte Nähzwirn weist gegenüber her­kömmlichen Nähzwirn hervorragende Näheigenschaften auf. So konnte in einem Nähtest festgestellt werden, daß der erfindungsgemäße Nähzwirn gegenüber Polyesterfilamentzwirnen eine doppelt so lange Nahtlänge bis zum Bruch aufweist. Die deutlich besseren thermischen und nähtechni­schen Eigenschaften werden ergänzt durch eine hervorragende Hydrolyse­beständigkeit und Beständigkeit gegen Chemikalien, wie z.B. Salzsäure, Schwefelsäure, Salpetersäure, Kalilauge und Trichlorethylen.The sewing thread produced by this process has excellent sewing properties compared to conventional sewing thread. It was found in a sewing test that the sewing thread according to the invention has a seam length twice as long as that of breakage compared to polyester filament threads. The significantly better thermal and sewing properties are complemented by excellent hydrolysis resistance and resistance to chemicals, e.g. Hydrochloric acid, sulfuric acid, nitric acid, potassium hydroxide solution and trichlorethylene.

Claims (6)

1. Nähgarn aus mindestens einem Multifilamentgarn, dessen verzwirnte Einzelfilamente aus einem thermoplastischen Kunststoff bestehen, dadurch gekennzeichnet, daß der Thermoplast ein Polyetherketon ist und das Multifilamentgarn einen Einzelfilamenttiter (nach DIN 53 830) von 1,0 bis 10 dtex, eine Bruchdehnung (nach DIN 53 815) von 3 bis 30 % und einen Kochschrumpf (nach DIN 53 866) von weniger als 10 % aufweisen.1. Sewing thread from at least one multifilament thread, the twisted individual filaments of which consist of a thermoplastic, characterized in that the thermoplastic is a polyether ketone and the multifilament thread has a single filament titer (according to DIN 53 830) of 1.0 to 10 dtex, an elongation at break (according to DIN 53 815) from 3 to 30% and a cooking shrinkage (according to DIN 53 866) of less than 10%. 2. Nähgarn nach Anspruch 1, dadurch gekennzeichnet, daß das Polyether­keton ein hochmolekulares Polymer mit einer relativen Viskosität, ge­messen 0,5 %ig in 96 %iger Schwefelsäure bei 25°C, von mehr als 1,0, vorzugsweise mehr als 1,3, ist.2. Sewing thread according to claim 1, characterized in that the polyether ketone is a high molecular weight polymer with a relative viscosity, measured 0.5% in 96% sulfuric acid at 25 ° C, of more than 1.0, preferably more than 1.3 , is. 3. Nähgarn nach Anspruch 1, dadurch gekennzeichnet, daß das Polyether­keton mindestens 50 % der Struktureinheiten
Figure imgb0006
 enthält.3. Sewing thread according to claim 1, characterized in that the polyether ketone at least 50% of the structural units
Figure imgb0006
 contains. 4. Nähgarn nach Anspruch 1, dadurch gekennzeichnet, daß das Multifila­mentgarn aus 10 bis 1000, vorzugsweise 20 bis 300 Einzelfilamenten, besteht.4. Sewing thread according to claim 1, characterized in that the multifilament thread consists of 10 to 1000, preferably 20 to 300 individual filaments. 5. Nähgarn nach Anspruch 1, bei dem ein einziges Multifilamentgarn vorgesehen ist, dadurch gekennzeichnet, daß der Drall der miteinander verzwirnten Einzelfilamente (nach DIN 53 832) zwischen α = 30 und 100 liegt.5. Sewing thread according to claim 1, in which a single multifilament thread is provided, characterized in that the twist of the individual filaments twisted together (according to DIN 53 832) is between α = 30 and 100. 6. Nähgarn nach Anspruch 1, bei dem mindestens zwei Multifilamentgarne vorgesehen sind, dadurch gekennzeichnet, daß der Drall für den Vorzwirn der einzelnen Ultifilamentgarne (nach DIN 53 832) zwischen αvor = 60 und 110 und der Drall für den Auszwirn der miteinander verzwirnten Multifilamentgarne (nach DIN 53 832) zwischen αaus = 80 und 120 liegt, wobei die Zwirnrichtungen des Vorzwirns und des Auszwirns einander entgegengesetzt sind.6. Sewing thread according to claim 1, in which at least two multifilament yarns are provided, characterized in that the twist for the pre-twist of the individual ultifilament yarns (according to DIN 53 832) between α before = 60 and 110 and the twist for the twisting of the multifilament yarns twisted together (according to DIN 53 832) lies between α aus = 80 and 120, whereby the twist directions of the pre-twist and the twist are opposite to each other.
EP90105692A 1989-03-30 1990-03-26 Sewing thread made from polyetherketone Expired - Lifetime EP0390025B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90105692T ATE101664T1 (en) 1989-03-30 1990-03-26 POLYETHERKETONE SEWING THREAD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910258A DE3910258A1 (en) 1989-03-30 1989-03-30 NUTRIENCE OF POLYETHERETONE
DE3910258 1989-03-30

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EP0390025A3 EP0390025A3 (en) 1991-04-17
EP0390025B1 EP0390025B1 (en) 1994-02-16

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DE102004015138A1 (en) * 2004-03-27 2005-10-27 Mewa Textil-Service Ag & Co. Management Ohg tissue
FR2939451B1 (en) * 2008-12-09 2011-01-07 Hexcel Reinforcements NEW INTERMEDIATE MATERIAL FOR LIMITING THE MICROFISSURATIONS OF COMPOSITE PIECES.
EP3298184A1 (en) * 2015-05-22 2018-03-28 PrimaLoft, Inc. Siliconized synthetic filament yarn
WO2019113025A1 (en) * 2017-12-04 2019-06-13 Cytec Industries Inc. Stitching yarn and ncf fabric containing such yarn

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KR970010725B1 (en) 1997-06-30
DE59004573D1 (en) 1994-03-24
ATE101664T1 (en) 1994-03-15
EP0390025A3 (en) 1991-04-17
ES2049360T3 (en) 1994-04-16
JPH02277836A (en) 1990-11-14
DE3910258A1 (en) 1990-10-04
EP0390025B1 (en) 1994-02-16
KR900014651A (en) 1990-10-24

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