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EP0755465A1 - Polyamide-66-monofilaments for precision fabrics - Google Patents

Polyamide-66-monofilaments for precision fabrics

Info

Publication number
EP0755465A1
EP0755465A1 EP96900825A EP96900825A EP0755465A1 EP 0755465 A1 EP0755465 A1 EP 0755465A1 EP 96900825 A EP96900825 A EP 96900825A EP 96900825 A EP96900825 A EP 96900825A EP 0755465 A1 EP0755465 A1 EP 0755465A1
Authority
EP
European Patent Office
Prior art keywords
polyamide
relaxation
tex
monofilament
monofilaments
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
EP96900825A
Other languages
German (de)
French (fr)
Other versions
EP0755465B1 (en
Inventor
Max Kurt
Paul Schaffner
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.)
ExNex AG
Original Assignee
Rhone Poulenc Viscosuisse SA
Societe de la Viscose Suisse SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhone Poulenc Viscosuisse SA, Societe de la Viscose Suisse SA filed Critical Rhone Poulenc Viscosuisse SA
Publication of EP0755465A1 publication Critical patent/EP0755465A1/en
Application granted granted Critical
Publication of EP0755465B1 publication Critical patent/EP0755465B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • 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
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y10T428/2969—Polyamide, polyimide or polyester

Definitions

  • the invention relates to dimensionally stable polyamide 66 onofilaments, with a titer of dtex 4f1-150f1, for the production of precision fabrics.
  • PET precision polyester
  • the reason for this preference over polyamide is the significantly higher modulus and the lower relaxation, i. H. less tension loss of the tensioned sieves, of PET.
  • a high module of the precision fabric results in a higher process security in the clamping process as well as a higher pressure precision through better clamping force.
  • a slight relaxation has a positive effect on the service life of the stencils.
  • the object of the invention is to provide a monofilament which has a significantly higher modulus than the standard polyamide filament.
  • Another task is to relax, respectively. To improve the loss of tension in the aqueous medium so that at least the level of polyester is reached.
  • Another object is to provide monofilaments which allow precision fabrics, in particular for direct tile and hollow body printing, to be produced with the desired properties without an additional operation.
  • the object of the invention is achieved in that the strength of the monofilaments is at least 60 cN / tex with an elongation of less than 25%, the specific L ⁇ SE, based on the initial titer, at least 7.5 cN / tex at 2% and at least 18 cN at 5% / tex and at 10% at least 40 cN / tex and the dry relaxation is less than 25%.
  • the monofilaments according to the invention achieve a precision fabric with a modulus which is about 25% higher (T 10 value) and relaxation behavior which is improved by about 50% compared to the prior art.
  • the fabric obtained is also characterized by a very uniform product appearance, and the risk of warp thread breaks in the weaving mill is greatly reduced.
  • the retardation reflects the creep behavior of a thermoplastic monofilament.
  • a retardation on the monofilament of less than 8% is particularly advantageous.
  • a retardation of more than 8% in the monofilament leads to insufficient dimensional stability in the finished fabric.
  • the retardation (creep) of the fila duck was measured by loading a monofilament with a tension of 2.5 cN / dtex and then recording the elongation as a function of time. The retardation is given in percent, based on the initial length after a retardation time of 120 minutes.
  • the relaxation of the filaments in the dry state was measured by loading a monofilament with a tension of 2.5 cN / dtex and then recording the loss of tension as a function of time.
  • the relaxation is stated in percent, based on the output voltage after a relaxation time of 60 minutes.
  • the measurement of the wet relaxation of the monofilament is based on the tensioning process and the subsequent use of a sieve in screen printing practice. Similar to tensioning a fabric on the tensioning frame, the thread is first drawn and held for 10 minutes with a constant specific force of 2.5 cN / dtex (elongation or retardation "dry”). Subsequently the relaxation is actually measured by keeping the length of the thread constant and measuring the tension reduction for 10 minutes (relaxation "dry”). After this "dry phase", the threads are still immersed in water, while the length is kept constant, and after 30 minutes the tension reduction is again recorded ("relaxation wet”). The difference between the stress measurements before and after the relaxation phase (10 min dry and 10 min wet) gives the wet relaxation. The value is given in percent.
  • the tissue samples are measured with a pretensioning force of 1.0 cN / dtex.
  • the measurement was carried out on 5 cm wide fabric strips and a clamping length of 200 mm according to DIN specification 53 857.
  • the relaxation of a tissue in the wet medium was measured by producing sieves of the format 43 x 53 cm from the various precision fabrics.
  • the precision fabrics were pre-tensioned to 25 N / cm on the tensioning device, then glued, sealed and stored for 5 days. Measurement of wet relaxation then took place.
  • the output voltage of the template was measured, it was then placed in water for 24 hours and the voltage was measured again after the elimination of the surface water.
  • the wet relaxation results from the difference between the voltage measurements before and after the water bath. The value is given in% voltage loss.
  • Embodiment 1 (thread production):
  • the threads of polyamide 66 were melt spun at a spinning speed of 320 m / min. With the total draw ratio of 4.70 used, the winding speed was 1510 m / min.
  • the temperature of the delivery godets was 70 ° C in each case, that of the stretching godets was varied between 180 and 220 ° C.
  • Table 1 shows various variants with their most important process settings and thread properties.
  • a standard polyamide monofilament (variant 1) was included in the investigation.
  • the raw fabric (production stage 1) was produced on commercially available weaving machines. Warp and weft yarns are the same in diameter. The titer is 47 dtex.
  • the fabric is treated in one or more thermal finishing steps in such a way that the finished fabric results in a symmetry of the thread numbers in the weft and warp direction of +/- 1 thread / cm and a symmetrical force / elongation behavior.
  • thread variant 2 was used both in the warp and in the weft.
  • Table 2 shows the reference forces arithmetically averaged from warp and weft directions at 10% (TlO value) and the wet relaxation of a finished precision fabric from thread variant 2 compared to a standard precision fabric (from thread variant 1). It can be seen that the precision fabric made of thread type 2 has an approximately 25% higher T10 value and an approximately 50% improved wet relaxation.
  • Fig. 2 shows the corresponding retardation curves (creep).
  • FIG. 4 shows a K / D diagram of the precision fabric with the monofilament according to the invention, averaged over warp and weft, in comparison to the known polyamide precision fabric.
  • the type 2 according to the invention has a significantly higher module than the standard PA6.6 type 1. Compared to the polyester, however, it is clearly visible that the latter still shows a significantly steeper curve rise, especially in the lowest area of elongation.
  • Figure 2 shows the retardation curves (creep) of PA standard type 1 and the two monofilament types 2 and 3 according to the invention. It can be seen that these with a retardation of 6.2% or. 6.6% are significantly better than the standard type with 10.5%.
  • FIG. 3 shows the relaxation behavior under practical conditions of the monofilament 2 according to the invention in comparison with a standard polyamide 66 monofilament (PA66) 1 and a standard polyester (PET) monofilament 3.
  • PA66 polyamide 66 monofilament
  • PET polyester
  • the monofilament according to the invention shows a total relaxation (proportion of dry relaxation and proportion of wet relaxation) after 20 min of 20.2% compared to 31.7% for the standard PA66 monofilament.
  • the monofilament according to the invention is also in the range of a polyester monofilament which has a total relaxation of 18.2% after the water treatment.
  • FIG. 4 shows the K / D diagram of the precision fabric made from the monofilament 2 according to the invention, averaged over warp and weft, in comparison to the known polyamide precision fabric 1 (fabric strips each 5 cm wide). It can be seen that the modulus of the fabric made from the monofilament 2 according to the invention is significantly higher than that of the standard polyamide 66 fabric 1.
  • the polyamide monofilament according to the invention combines in an excellent manner, without chemical modifications of the polymer, the properties of a polyamide required for screen printing with those of polyester. This results in a L ⁇ SE improved by approximately 40% and a 2% improvement in wet relaxation compared to the standard polyamide 66 monofilament.
  • the monofilament is suitable for precision fabrics, preferably for use in direct press and hollow body printing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Woven Fabrics (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

The invention concerns a polyamide-66-monofilament with improved initial modulus and with a titre of dtex 4f1-150f1. The strength of the monofilaments is at least 60 cN/tex for an extension of less than 25 % and the specific LASE, in relation to the initial titre at 2 % is at least 7.5cN/tex, at 5 % at least 18cN/tex and at 10 % at least 40 cN/tex, and the dry relaxation is less than 25 %. The result is an improvement of about 40 % in the LASE at 2 % and an improvement of about 35 % in the wet relaxation compared to standard polyamide (PA 66) monofilament. The precision fabric manufactured from the monofilaments disclosed is particularly suitable for direct use in direct printing onto non-woven fabrics and hollow articles.

Description

Polyamid-66-Monofilamente für Präzisionsgewebe Polyamide 66 monofilaments for precision fabrics
Die Erfindung betrifft dimensionsstabile Polyamid-66- onofilamente, mit einem Titer von dtex 4f1-150f1, zur Herstellung von Präzisionsgeweben.The invention relates to dimensionally stable polyamide 66 onofilaments, with a titer of dtex 4f1-150f1, for the production of precision fabrics.
Beim Siebdruck wird im allgemeinen mit Präzisionsgeweben aus Polyester (PET) gearbeitet. Der Grund für diese Bevorzugung gegenüber Polyamid ist der deutlich höhere Modul und die geringere Relaxation, d. h. geringerer Spannungsverlust der gespannten Siebe, von PET. Ein hoher Modul des Präzisionsgewebes bewirkt eine höhere Prozessicherheit im Spannvorgang sowie eine höhere Druckpräzision durch bessere Rückspannkraft. Eine geringe Relaxation wirkt sich positiv auf die Gebrauchsdauer der Druckschablonen aus.Screen printing generally uses precision polyester (PET) fabrics. The reason for this preference over polyamide is the significantly higher modulus and the lower relaxation, i. H. less tension loss of the tensioned sieves, of PET. A high module of the precision fabric results in a higher process security in the clamping process as well as a higher pressure precision through better clamping force. A slight relaxation has a positive effect on the service life of the stencils.
Beim Direktfliesendruck ist die Situation anders. In diesem Bereich wird mit Pigment-Farbstoffen gearbeitet, welche sehr abrasiv sind. Es ist bekannt, dass die Widerstandsfähigkeit von Polyamid-Präzisionsgeweben gegenüber diesen Farbstoffen deutlich höher ist als jene der Polyester-Präzisionsgewebe, so dass sich die spezifischen Vor- und Nachteile von Polyester und Polyamid in etwa die Waage halten. Aus diesem Grund wird im Direktfliesendruck neben Polyester vielfach auch Polyamid eingesetzt. Durch die Optimierung der Gewebeherstellung wurde bereits versucht, den Modul und das Relaxationsverhalten von Polyamid-Geweben in Richtung Polyestergewebe entscheidend zu verbessern (H.P. Lisson, Serigraphie/-Siebdruckpraxis 5/92, S.36-43). Das erhaltene Polyamidgewebe weist zwar gegenüber dem normalen Polyamidgewebe gewisse Verbesserungen auf, diese sind aber hinsichtlich des Moduls und des Relaxationsverhaltens der Monofilamente noch ungenügend.The situation is different with direct tile printing. This area works with pigment dyes, which are very abrasive. It is known that the resistance of polyamide precision fabrics to these dyes is significantly higher than that of polyester precision fabrics, so that the specific advantages and disadvantages of polyester and polyamide are roughly balanced. For this reason, in addition to polyester, polyamide is often used in direct tile printing. By optimizing the fabric production, the module and to decisively improve the relaxation behavior of polyamide fabrics in the direction of polyester fabrics (HP Lisson, Serigraphie / Siebdruckpraxis 5/92, pp.36-43). The polyamide fabric obtained has certain improvements over the normal polyamide fabric, but these are still insufficient in terms of the modulus and the relaxation behavior of the monofilaments.
Aufgabe der Erfindung ist es, ein Monofilament zur Verfügung zu stellen, welches gegenüber dem Standard- Polyamidfilament einen deutlich höheren Modul aufweist.The object of the invention is to provide a monofilament which has a significantly higher modulus than the standard polyamide filament.
Eine weitere Aufgabe ist es, die Relaxation resp. den Spannungsverlust im wässrigen Medium so zu verbessern, dass wenigstens das Niveau von Polyester erreicht wird.Another task is to relax, respectively. To improve the loss of tension in the aqueous medium so that at least the level of polyester is reached.
Eine weitere Aufgabe ist es, Monofilamente bereitzustel¬ len, die es erlauben, Präzisionsgewebe, insbesondere für den Direktfliesen- und Hohlkörperdruck, mit den gewünschten Eigenschaften ohne zusätzlichen Arbeitsgang herzustellen.Another object is to provide monofilaments which allow precision fabrics, in particular for direct tile and hollow body printing, to be produced with the desired properties without an additional operation.
Die erfindungsgemässe Aufgabe wird dadurch gelöst, dass die Festigkeit der Monofilamente wenigstens 60 cN/tex bei einer Dehnung von weniger als 25 %, der spezifische LÄSE, bezogen auf den Ausgangstiter, bei 2 % wenigstens 7.5 cN/tex, bei 5 % wenigstens 18 cN/tex und bei 10 % wenigstens 40 cN/tex und die Trockenrelaxation weniger als 25% betragen.The object of the invention is achieved in that the strength of the monofilaments is at least 60 cN / tex with an elongation of less than 25%, the specific LÄSE, based on the initial titer, at least 7.5 cN / tex at 2% and at least 18 cN at 5% / tex and at 10% at least 40 cN / tex and the dry relaxation is less than 25%.
Es ist überraschend, dass mit den erfindungsgemässen Monofilamenten ein Präzisionsgewebe mit einem um etwa 25% höheren Modul (T 10-Wert) und ein um etwa 50 % gegenüber dem Stand der Technik verbessertes Relaxationsverhalten erreicht wird. Das erhaltene Gewebe zeichnet sich ausserdem durch ein sehr gleich ässiges Warenbild aus, und die Gefahr von Kettfadenbrüchen in der Weberei ist stark reduziert.It is surprising that the monofilaments according to the invention achieve a precision fabric with a modulus which is about 25% higher (T 10 value) and relaxation behavior which is improved by about 50% compared to the prior art. The fabric obtained is also characterized by a very uniform product appearance, and the risk of warp thread breaks in the weaving mill is greatly reduced.
Die Retardation gibt das Kriechverhalten eines thermoplastischen Monofilaments wieder. Besonders vorteilhaft ist eine Retardation am Monofilament von weniger als 8 %. Eine Retardation von mehr als 8 % im Monofilament führt zu ungenügenden Dimensionsstabilitäten am fertigen Gewebe.The retardation reflects the creep behavior of a thermoplastic monofilament. A retardation on the monofilament of less than 8% is particularly advantageous. A retardation of more than 8% in the monofilament leads to insufficient dimensional stability in the finished fabric.
Messmethoden:Measurement methods:
Die Messung der mechanischen Eigenschaften der Monofilamente erfolgte nach den Normen DIN 53815 und DIN 53834.The mechanical properties of the monofilaments were measured in accordance with the standards DIN 53815 and DIN 53834.
Die Retardation (Kriechen) der Fila ente wurde gemessen, indem ein Monofilament mit einer Spannung von 2,5 cN/dtex belastet wurde und anschliessend die Längung in Funktion der Zeit aufgezeichnet wurde. Die Angabe der Retardation erfolgt in Prozent, bezogen auf die Ausgangslänge nach einer Retardationszeit von 120 Minuten.The retardation (creep) of the fila duck was measured by loading a monofilament with a tension of 2.5 cN / dtex and then recording the elongation as a function of time. The retardation is given in percent, based on the initial length after a retardation time of 120 minutes.
Die Relaxation der Filamente im trockenen Zustand wurde gemessen, indem ein Monofilament mit einer Spannung von 2,5 cN/dtex belastet wurde und anschliessend der Spannungsverlust in Funktion der Zeit aufgezeichnet wurde. Die Angabe der Relaxation erfolgt in Prozent, bezogen auf die Ausgangsspannung nach einer Relaxations¬ zeit von 60 Minuten.The relaxation of the filaments in the dry state was measured by loading a monofilament with a tension of 2.5 cN / dtex and then recording the loss of tension as a function of time. The relaxation is stated in percent, based on the output voltage after a relaxation time of 60 minutes.
Die Messung der Nassrelaxation des Monofilaments erfolgt in Anlehnung an den Spannvorgang und den anschliessenden Einsatz eines Siebes in der Siebdruckpraxis. Ähnlich wie beim Spannen eines Gewebes auf dem Spannrahmen wird der Faden zuerst gezogen und während 10 Minuten mit einer konstanten spezifischen Kraft von 2,5 cN/dtex gehalten (Längung resp. Retardation "trocken"). Anschliessend erfolgt die eigentliche Messung der Relaxation, indem die Länge des Fadens konstant gehalten und während 10 Minuten der Spannungsabbau gemessen wird (Relaxation "trocken"). Nach dieser "trockenen Phase" werden die Fäden, immer noch bei konstant gehaltener Länge, in Wasser eingetaucht, und nach 30 Minuten wird wiederum der Spannungsabbau registriert ("Relaxation nass"). Die Differenz der Spannungsmessungen vor und nach der Relaxationsphase (10 min trocken und 10 min nass) ergibt die Nassrelaxation. Der Wert wird in Prozent angegeben.The measurement of the wet relaxation of the monofilament is based on the tensioning process and the subsequent use of a sieve in screen printing practice. Similar to tensioning a fabric on the tensioning frame, the thread is first drawn and held for 10 minutes with a constant specific force of 2.5 cN / dtex (elongation or retardation "dry"). Subsequently the relaxation is actually measured by keeping the length of the thread constant and measuring the tension reduction for 10 minutes (relaxation "dry"). After this "dry phase", the threads are still immersed in water, while the length is kept constant, and after 30 minutes the tension reduction is again recorded ("relaxation wet"). The difference between the stress measurements before and after the relaxation phase (10 min dry and 10 min wet) gives the wet relaxation. The value is given in percent.
Bei den K/D-Diagrammen von Gewebestreifen ist der Kurvenverlauf, insbesondere im unteren Dehnungsbereich, stark von der Strukturprägung in einem Gewebe in Kett- und Schussrichtung abhängig. Je nach Web- und Ausrüstbedingungen kann z.B. der Schussfaden relativ geradlinig im Gewebe liegen, währendem der Kettfaden eine starke wellenförmige Strukturprägung aufweist. Dies führt zu stark unterschiedlichen Werten, insbesondere bei den Bezugskräften. Zur Kompensation der durch die Struktur¬ prägung bedingten Wechselwirkung zwischen Kette und Schuss im Gewebe sollten für die Bestimmung der Bezugs¬ kräfte im Gewebe stets beide Richtungen resp. das arith¬ metische Mittel von Kette und Schuss bestimmt werden. Um den Effekt der Strukturprägung zu minimieren und ein effektiv mit den Fadeneigenschaften korrespondierendes Resultat zu erhalten, werden die Gewebeproben mit einer Vorspannkraft von 1.0 cN/dtex gemessen. Die Messung erfolgte an 5 cm breiten Gewebestreifen und einer Einspannlänge von 200 mm nach DIN-Vorschrift 53 857.In the K / D diagrams of fabric strips, the course of the curve, particularly in the lower stretch area, is heavily dependent on the structure embossing in a fabric in the warp and weft directions. Depending on the weaving and equipment conditions, e.g. the weft thread lies relatively straight in the fabric, while the warp thread has a strong wavy structure embossing. This leads to very different values, especially for the reference forces. In order to compensate for the interaction between warp and weft in the fabric caused by the structure embossing, both directions or should always be used for determining the reference forces in the fabric. the arithmetic mean of warp and weft can be determined. In order to minimize the effect of the structure embossing and to obtain a result that corresponds effectively to the thread properties, the tissue samples are measured with a pretensioning force of 1.0 cN / dtex. The measurement was carried out on 5 cm wide fabric strips and a clamping length of 200 mm according to DIN specification 53 857.
Die Relaxation eines Gewebes im nassen Medium wurde gemessen, indem aus den verschiedenen Präzisionsgeweben Siebe des Formats 43 x 53 cm hergestellt wurden. Dabei wurden die Präzisionsgewebe auf dem Spanngerät auf 25 N/cm vorgespannt, anschliessend verklebt, versiegelt und während 5 Tagen gelagert. Die Messung der Nassrelaxation erfolgte anschliessend. Dazu wurde die Ausgangsspannung der Schablone gemessen, diese darauf während 24 Stunden in Wasser gelegt und nach der Elimination des Oberflächenwassers die Spannung danach erneut gemessen. Aus der Differenz der Spannungsmessungen vor und nach dem Wasserbad ergibt sich die Nassrelaxation. Der Wert wird in % Spannungsverlust angegeben.The relaxation of a tissue in the wet medium was measured by producing sieves of the format 43 x 53 cm from the various precision fabrics. The precision fabrics were pre-tensioned to 25 N / cm on the tensioning device, then glued, sealed and stored for 5 days. Measurement of wet relaxation then took place. For this purpose, the output voltage of the template was measured, it was then placed in water for 24 hours and the voltage was measured again after the elimination of the surface water. The wet relaxation results from the difference between the voltage measurements before and after the water bath. The value is given in% voltage loss.
Die Erfindung soll anhand von Beispielen erläutert werden.The invention will be explained using examples.
Ausführungsbeispiel 1 (Fadenherstellung):Embodiment 1 (thread production):
Die Fäden aus Polyamid 66 wurden mit einer Spinngeschwindigkeit von 320 m/min schmelzgesponnen. Mit dem angewendeten Gesamt-Streckverhältnis von 4.70 ergab sich eine AufSpulgeschwindigkeit von 1510 m/min. Die Temperatur der Liefergaletten betrug jeweils 70°C, jene der Streckgaletten wurde zwischen 180 und 220°C variiert.The threads of polyamide 66 were melt spun at a spinning speed of 320 m / min. With the total draw ratio of 4.70 used, the winding speed was 1510 m / min. The temperature of the delivery godets was 70 ° C in each case, that of the stretching godets was varied between 180 and 220 ° C.
In Tabelle 1 sind verschiedene Varianten mit ihren wichtigsten Verfahrenseinstellungen und Fadeneigenschaf¬ ten zusammengestellt. Zusätzlich wurde ein Standard-Poly- amid-Monofil (Variante 1 ) in die Untersuchung miteinbezogen. Table 1 shows various variants with their most important process settings and thread properties. In addition, a standard polyamide monofilament (variant 1) was included in the investigation.
Tabelle 1Table 1
Variante 1* 2 3 4Variant 1 * 2 3 4
Streck-bedinαunαen:Streck-bedinαunαen:
Gesamtverstr. [-] 4.0 4.7 4.7 4.7Total ver. [-] 4.0 4.7 4.7 4.7
Liefertemp. [°C] 70 70 70 70Delivery temp. [° C] 70 70 70 70
Strec temp. [°C] 180 220 220 220Strec temp. [° C] 180 220 220 220
Relax. Verh. [-] 0.95 1.00 1.00 1.00Relax. Ratio [-] 0.95 1.00 1.00 1.00
Aufspulgeschw. [m/min] 1240 1510 1510 1510Winding speed [m / min] 1240 1510 1510 1510
Fadeneiσenschaften:Thread properties:
Titer [dtex] 46.0 47.1 33.6 22.4Titer [dtex] 46.0 47.1 33.6 22.4
Festigkeit [cN/tex] 53.7 69.7 70.7 71.1Strength [cN / tex] 53.7 69.7 70.7 71.1
Dehnung [%] 36.0 21.9 21.7 19.6Elongation [%] 36.0 21.9 21.7 19.6
LÄSE 2% [cN] 25.9 38.1 31.0 22.2 spez. LÄSE 2%[cN/tex] 5.6 8.1 9.2 9.9READ 2% [cN] 25.9 38.1 31.0 22.2 spec. READ 2% [cN / tex] 5.6 8.1 9.2 9.9
LÄSE 5% [CN] 52.6 95.1 72.8 55.3 spez. LÄSE 5%[cN/tex] 11.4 20.2 21.7 24.7LENS 5% [CN] 52.6 95.1 72.8 55.3 spec. LÄSE 5% [cN / tex] 11.4 20.2 21.7 24.7
LÄSE 10% [CN] 125 208 160 121 spez. LASE10%[cN/tex] 27.2 44.2 47.6 54.0LENS 10% [CN] 125 208 160 121 spec. LASE10% [cN / tex] 27.2 44.2 47.6 54.0
KS [%] 6.4 7.7 8.2 8.1KS [%] 6.4 7.7 8.2 8.1
TS 160°C [%] 3.7 4.8 5.1 5.2TS 160 ° C [%] 3.7 4.8 5.1 5.2
TS 190°C [%] 5.1 6.4 6.5 6.4TS 190 ° C [%] 5.1 6.4 6.5 6.4
Trockenrelaxation [%] 26.8 21.9 19.3 18.4Dry relaxation [%] 26.8 21.9 19.3 18.4
Nassrelaxation [%] 31.7 20.2 - -Wet relaxation [%] 31.7 20.2 - -
Retardation [%] 10.5 6.2 6.6 6.3Retardation [%] 10.5 6.2 6.6 6.3
* Standard-Polyamid 66-Monofil Ausführungsbeispiel 2 (Gewebeherstellung):* Standard polyamide 66 monofilament Embodiment 2 (fabric production):
Die Herstellung des Rohgewebes (Fertigungsstufe 1 ) erfolgte auf handelsüblichen Webmaschinen. Kett- und Schussgarn sind dabei im Durchmesser gleich. Der Titer beträgt 47 dtex.The raw fabric (production stage 1) was produced on commercially available weaving machines. Warp and weft yarns are the same in diameter. The titer is 47 dtex.
In der Ausrüststufe (Fertigungsstufe 2) wird das Gewebe in einem oder mehreren thermischen Ausrüstschritten derart behandelt, dass beim fertigen Gewebe eine Symmetrie der Fadenzahlen in Schuss- und Kettrichtung von +/- 1 Faden/cm sowie ein symmetrisches Kraft/Dehnungs¬ verhalten resultieren.In the finishing stage (manufacturing stage 2), the fabric is treated in one or more thermal finishing steps in such a way that the finished fabric results in a symmetry of the thread numbers in the weft and warp direction of +/- 1 thread / cm and a symmetrical force / elongation behavior.
In einem Webversuch wurde die Fadenvariante 2 sowohl in der Kette wie im Schuss eingesetzt. Tabelle 2 zeigt die aus Kett- und Schussrichtung arithmetisch gemittelten Bezugskräfte bei 10 % (TlO-Wert) und die Nassrelaxation eines fertigen Präzisionsgewebes aus der Fadenvariante 2 im Vergleich zu einem Standard-Präzisionsgewebe (aus Fadenvariante 1 ) . Es ist ersichtlich, dass das Präzi¬ sionsgewebe aus Fadentyp 2 einen um ca. 25 % höheren T10- Wert und eine um ca. 50% verbesserte Nassrelaxation aufweist.In a weaving test, thread variant 2 was used both in the warp and in the weft. Table 2 shows the reference forces arithmetically averaged from warp and weft directions at 10% (TlO value) and the wet relaxation of a finished precision fabric from thread variant 2 compared to a standard precision fabric (from thread variant 1). It can be seen that the precision fabric made of thread type 2 has an approximately 25% higher T10 value and an approximately 50% improved wet relaxation.
Tabelle 2Table 2
Variante 2 1 *Variant 2 1 *
T10-Wert [daN/cm] 10. 4 8. 1 spez . Tl O-Wert [cN/tex] 36.3 28.7T10 value [daN / cm] 10. 4 8. 1 spec. Tl O value [cN / tex] 36.3 28.7
Fadendichte [Fäden /cm] 58 58Thread density [threads / cm] 58 58
Nassrelaxation [% ] 8.5 16.2Wet relaxation [%] 8.5 16.2
* Standard-Polyamid 66-Präzisionsgewebe Eine Zeichnung soll die Ergebnisse der Erfindung weiter erläutern.* Standard polyamide 66 precision fabric A drawing is intended to explain the results of the invention further.
Es zeigen:Show it:
Fig. 1 die K/D-Diagramme gemäss den erfindungsgemässen Monofilamenten im Vergleich zu den bekannten Polyamid- und Polyestermonofilamenten.1 shows the K / D diagrams according to the monofilaments according to the invention in comparison to the known polyamide and polyester monofilaments.
Fig. 2 die entsprechenden Retardationskurven (Kriechen).Fig. 2 shows the corresponding retardation curves (creep).
Fig. 3 das Relaxationsverhalten des erfindungsgemässen Monofilamentes3 shows the relaxation behavior of the monofilament according to the invention
Fig. 4 zeigt über Kette und Schuss gemittelte K/D- Diagramm des Präzisionsgewebes mit dem erfindungsgemässen Monofilament im Vergleich zum bekannten Polyamid- Präzisionsgewebe.4 shows a K / D diagram of the precision fabric with the monofilament according to the invention, averaged over warp and weft, in comparison to the known polyamide precision fabric.
Aus den K/D-Diagrammen der Fig. 1 ist ersichtlich, dass der erfindungsgemässe Typ 2 gegenüber dem Standard-PA6.6 Typ 1 einen wesentlich höheren Modul aufweist. Verglichen mit dem Polyester ist aber klar sichtbar, dass letzterer vor allem im untersten Bereich der Dehnung immer noch einen deutlich steileren Kurvenanstieg aufweist.It can be seen from the K / D diagrams in FIG. 1 that the type 2 according to the invention has a significantly higher module than the standard PA6.6 type 1. Compared to the polyester, however, it is clearly visible that the latter still shows a significantly steeper curve rise, especially in the lowest area of elongation.
Figur 2 zeigt die Retardationskurven (Kriechen) von PA- Standard Typ 1 und den beiden erfindungsgemässen Monofil- Typen 2 und 3. Es ist ersichtlich, dass diese mit einer Retardation von 6,2% resp. 6,6% deutlich besser sind als der Standard-Typ mit 10.5%.Figure 2 shows the retardation curves (creep) of PA standard type 1 and the two monofilament types 2 and 3 according to the invention. It can be seen that these with a retardation of 6.2% or. 6.6% are significantly better than the standard type with 10.5%.
Die Retardationskurven wurden aufgenommen, indem die Fäden mit einer Spannung von 2,5 cN/dtex belastet wurden und anschliessend die Längung mit der Zeit, angegeben in % gegenüber der Ausgangslänge, gemessen wurde. Figur 3 zeigt das Relaxationsverhalten unter praxisnahen Bedingungen des erfindungsgemässen Monofilaments 2 im Vergleich zu einem Standard Polyamid-66-Monofilament (PA66) 1 und einem Standard Polyester (PET)-Monofilament 3. Vor der Zugabe von Wasser wurden die Monofilamente während 10 min trocken relaxiert. Nach der Trockenrelaxation zeigt das erfindungsgemässe Monofilament mit 2,8 % deutlich die geringste Relaxation gegenüber dem Standard PA66 Monofilament mit 11,1 % und PET mit 9,1 %. Mit der Zugabe von Wasser zeigt das erfindungsgemässe Monofilament nach 60 min eine Gesamtrelaxation (Anteil Trockenrelaxation und Anteil Nassrelaxation) von 20,2 % im Vergleich zu 31,7 % beim Standard PA66-Monofilament. Das erfindungsgemässe Monofilament liegt zudem im Bereich eines Polyester- Monofilaments, welches nach der Wasserbehandlung eine Gesamtrelaxation von 18,2 % aufweist.The retardation curves were recorded by loading the threads with a tension of 2.5 cN / dtex and then measuring the elongation over time, given in% compared to the initial length. FIG. 3 shows the relaxation behavior under practical conditions of the monofilament 2 according to the invention in comparison with a standard polyamide 66 monofilament (PA66) 1 and a standard polyester (PET) monofilament 3. Before the addition of water, the monofilaments were relaxed dry for 10 minutes . After the dry relaxation, the monofilament according to the invention with 2.8% clearly shows the least relaxation compared to the standard PA66 monofilament with 11.1% and PET with 9.1%. With the addition of water, the monofilament according to the invention shows a total relaxation (proportion of dry relaxation and proportion of wet relaxation) after 20 min of 20.2% compared to 31.7% for the standard PA66 monofilament. The monofilament according to the invention is also in the range of a polyester monofilament which has a total relaxation of 18.2% after the water treatment.
Figur 4 zeigt das über Kette und Schuss gemittelte K/D- Diagramm des Präzisionsgewebes aus dem erfindungsgemässen Monofilament 2 im Vergleich zum bekannten Polyamid- Präzisionsgewebe 1 (Gewebestreifen von jeweils 5 cm Breite). Es ist ersichtlich, dass der Modul des Gewebes aus dem erfindungsgemässen Monofilament 2 deutlich über jenem des Standard-Polyamid 66-Gewebes 1 liegt.FIG. 4 shows the K / D diagram of the precision fabric made from the monofilament 2 according to the invention, averaged over warp and weft, in comparison to the known polyamide precision fabric 1 (fabric strips each 5 cm wide). It can be seen that the modulus of the fabric made from the monofilament 2 according to the invention is significantly higher than that of the standard polyamide 66 fabric 1.
Das erfindungsge ässe Polyamidmonofilament kombiniert in hervorragender Weise, ohne chemische Modifikationen des Polymers, die für den Siebdruck erforderlichen Eigen- schatten eines Polyamids mit jenen von Polyester. Es resultieren ein um etwa 40 % verbesserter LÄSE bei 2% eine um etwa 35% verbesserte Nassrelaxation gegenüber dem Standard-Polyamid-66-Monofilament. Das Monofilament ist für Präzisionsgewebe, bevorzugt zum Einsatz im DirektfHessen- und Hohlkörperdruck geeignet. The polyamide monofilament according to the invention combines in an excellent manner, without chemical modifications of the polymer, the properties of a polyamide required for screen printing with those of polyester. This results in a LÄSE improved by approximately 40% and a 2% improvement in wet relaxation compared to the standard polyamide 66 monofilament. The monofilament is suitable for precision fabrics, preferably for use in direct press and hollow body printing.

Claims

10Patentansprüche 10 patent claims
1. Dimensionsstabile Polyamid-66-Monofilamente, mit einem Titer von dtex 4f1-150f1, zur Herstellung von Präzi¬ sionsgeweben, dadurch gekennzeichnet, dass die1. Dimensionally stable polyamide 66 monofilaments, with a titer of dtex 4f1-150f1, for the production of precision fabrics, characterized in that the
10 Festigkeit der Monofilamente wenigstens 60 cN/tex bei einer Dehnung von weniger als 25 %, der spezifische LÄSE, bezogen auf den Ausgangstiter bei 2 % wenigstens 7.5 cN/tex, bei 5 % wenigstens 18 cN/tex und bei 10 % wenigstens 40 cN/tex und die10 Strength of the monofilaments at least 60 cN / tex with an elongation of less than 25%, the specific LÄSE, based on the initial titer at least 7.5 cN / tex at 2%, at least 18 cN / tex at 5% and at least 40 cN at 10% / tex and the
15 Trockenrelaxation weniger als 25% betragen.15 dry relaxation amount to less than 25%.
2. Polyamidmonofilamente nach Anspruch 1, gekennzeichnet durch eine Nassrelaxation weniger als 25 %.2. polyamide monofilaments according to claim 1, characterized by a wet relaxation less than 25%.
20 3. Polyamidmonofilamente nach Anspruch 1, gekennzeichnet durch eine Retardation von kleiner als 8%. 3. Polyamide monofilaments according to claim 1, characterized by a retardation of less than 8%.
EP96900825A 1995-02-09 1996-02-05 Polyamide-66-monofilaments for precision fabrics Expired - Lifetime EP0755465B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH383/95 1995-02-09
CH38395 1995-02-09
PCT/CH1996/000042 WO1996024711A1 (en) 1995-02-09 1996-02-05 Polyamide-66-monofilaments for precision fabrics

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EP0755465A1 true EP0755465A1 (en) 1997-01-29
EP0755465B1 EP0755465B1 (en) 1999-01-13

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EP0846197B1 (en) * 1995-08-24 2000-03-22 Rhodia Filtec AG Process for producing a high-strength, high-shrinkage polyamide 66 filament yarn
US20100154146A1 (en) 2008-07-02 2010-06-24 S.C. Johnson & Son, Inc. Carpet decor and setting solution compositions
JP4669942B2 (en) * 2006-02-06 2011-04-13 東レ・モノフィラメント株式会社 Polyamide monofilament for industrial fabric, process for producing the same, and industrial fabric
US20080182938A1 (en) * 2007-01-25 2008-07-31 Heping Zhang Toughened monofilaments
CN104271822B (en) * 2012-05-11 2016-07-27 东洋纺株式会社 A kind of without coating fabric for safety air bag
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CN1064725C (en) 2001-04-18
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CN1146785A (en) 1997-04-02
JP3105000B2 (en) 2000-10-30
DE59601134D1 (en) 1999-02-25
ES2128154T3 (en) 1999-05-01
TW333562B (en) 1998-06-11
WO1996024711A1 (en) 1996-08-15
US5707733A (en) 1998-01-13

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