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EP1169501B1 - Synthetic monofilament - Google Patents

Synthetic monofilament Download PDF

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Publication number
EP1169501B1
EP1169501B1 EP00920434A EP00920434A EP1169501B1 EP 1169501 B1 EP1169501 B1 EP 1169501B1 EP 00920434 A EP00920434 A EP 00920434A EP 00920434 A EP00920434 A EP 00920434A EP 1169501 B1 EP1169501 B1 EP 1169501B1
Authority
EP
European Patent Office
Prior art keywords
monofilament
polyurethane
synthetic
synthetic fiber
polybutylene terephthalate
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.)
Revoked
Application number
EP00920434A
Other languages
German (de)
French (fr)
Other versions
EP1169501A1 (en
Inventor
Hans Hinterkeuser
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.)
HAHL MONOFIL GMBH
Original Assignee
Hahl Monofil 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7901622&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1169501(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hahl Monofil GmbH filed Critical Hahl Monofil GmbH
Publication of EP1169501A1 publication Critical patent/EP1169501A1/en
Application granted granted Critical
Publication of EP1169501B1 publication Critical patent/EP1169501B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

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
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters

Definitions

  • the invention relates to monofilament synthetic fibers based on polybutylene terephthalate.
  • Monofilament synthetic fibers made from polybutylene terephthalate (PBT) known e.g. Hansjürgen Saechtling: plastic pocket book, 22nd edition, 1983, page 298 ff., Carl Hanser-Verlag, Kunststoff. These monofilaments can be used for production, for example of fabrics and screens for paper machines. Because such monofilaments are particularly strong in use are mechanically and chemically stressed, there is Strive to such synthetic fibers based on polybutylene terephthalate in terms of their mechanical and chemical To improve properties.
  • WO 99/15047 A are plastic bristles made of polybutylene terephthalate and 1-25% by weight of polyurethane and their use known as wash brushes in car washes.
  • WO 99/15047 A is a publication which is included in the article 54 (3) EPC for the contracting states AT, BE, CH, DE, DK, ES, FR, GB, IE, IT, LI, NL, PT, SE, FI falls.
  • the object of the invention is a synthetic fiber based on polybutylene terephthalate specify which compared to synthetic fibers from pure polybutylene terephthalate better properties with regard to abrasion resistance and dimensional stability, is nevertheless sufficiently flexible.
  • a monofilament synthetic fiber according to the invention can be after manufacture usual extrusion spinning processes.
  • Commodity Trokken Kunststofftrockner ensure in advance that the raw material mixture, which is fed to the extruder, not one has a high moisture content. Come as an extruder both single and twin screws with and without degassing for use. All other parts of the system correspond to those for the technical conditions necessary for standard monofilament production.
  • the monofilament according to the invention is particularly preferred Synthetic fiber for the production of fabrics or sieves, especially for paper machine clothing.
  • This paper machine clothing can be inside the paper machine both in the wire section and in the press section as well as in the dryer section.
  • Synthetic fiber from pure polybutylene terephthalate examined, with a thread diameter of 0.22 mm. This thread diameter was examined because in the wet felt area Such a thread is often used in paper machines becomes. This synthetic fiber is referred to below as synthetic fiber I.
  • a monofilament synthetic fiber according to the invention investigated with the following composition: 95.0% by weight of polybutylene terephthalate and 5.0 wt% polyurethane, this fiber is referred to below as synthetic fiber II. She pointed also a diameter of 0.22 mm.
  • Synthetic fiber I Synthetic fiber II Tours [RPM] 100 100 Time [s] 10 10 Abrasion [%] 5 3 Tours [RPM] 100 100 Time [s] 20 20 Abrasion [%] 13 7 Tours [RPM] 100 100 Time [s] 30 30 Abrasion [%] 21 11

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)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Materials For Medical Uses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

The aim of the invention is to provide a synthetic monofilament on the basis of polybutyleneterephthalate, whereby said monofilament is provided with better abrasion stability and dimensional stability properties in relation to synthetic fibres made of pure polybulyeneterephthalate and is sufficiently flexible at the same time. To this end, a synthetic monofilament made of polybutyleneterephthalate and polyurethane is provided.

Description

Die Erfindung betrifft monofile Kunstfasern auf Polybutylenterephthalatbasis.The invention relates to monofilament synthetic fibers based on polybutylene terephthalate.

Monofile Kunstfasern aus Polybutylenterephthalat (PBT) sind bekannt (z.B. Hansjürgen Saechtling: Kunststofftaschenbuch, 22. Ausgabe, 1983, Seite 298 ff., Carl Hanser-Verlag, München). Diese Monofile können beispielsweise zur Produktion von Geweben sowie Sieben für Papiermaschinen eingesetzt werden. Da derartige Monofile im Einsatz insbesondere stark mechanisch und chemisch beansprucht werden, besteht das Bestreben, derartige Kunstfasern auf Polybutylenterephthalatbasis im Hinblick auf ihre mechanischen und chemischen Eigenschaften zu verbessern.Monofilament synthetic fibers made from polybutylene terephthalate (PBT) known (e.g. Hansjürgen Saechtling: plastic pocket book, 22nd edition, 1983, page 298 ff., Carl Hanser-Verlag, Munich). These monofilaments can be used for production, for example of fabrics and screens for paper machines. Because such monofilaments are particularly strong in use are mechanically and chemically stressed, there is Strive to such synthetic fibers based on polybutylene terephthalate in terms of their mechanical and chemical To improve properties.

Aus WO 99/15047 A sind Kunststoffborsten aus Polybutylenterephthalat und 1 - 25 Gew.% Polyurethan und deren Verwendung als Waschbürsten in Autowaschanlagen bekannt. WO 99/15047 A ist eine Druckschrift, die unter den Artikel 54(3) EPÜ für die Vertragsstaaten AT, BE, CH, DE, DK, ES, FR, GB, IE, IT, LI, NL, PT, SE, FI fällt.WO 99/15047 A are plastic bristles made of polybutylene terephthalate and 1-25% by weight of polyurethane and their use known as wash brushes in car washes. WO 99/15047 A is a publication which is included in the article 54 (3) EPC for the contracting states AT, BE, CH, DE, DK, ES, FR, GB, IE, IT, LI, NL, PT, SE, FI falls.

Aufgabe der Erfindung ist es, eine Kunstfaser auf Polybutylenterephthalatbasis anzugeben, welche gegenüber Kunstfasern aus reinem Polybutylenterephthalat bessere Eigenschaften hinsichtlich der Abriebfestigkeit und Formstabilität aufweist, gleichwohl aber ausreichend flexibel ist.The object of the invention is a synthetic fiber based on polybutylene terephthalate specify which compared to synthetic fibers from pure polybutylene terephthalate better properties with regard to abrasion resistance and dimensional stability, is nevertheless sufficiently flexible.

Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 jedes der Sätze von Ansprüchen für die Vertragsstaaten GR, LU, MC, CY und für die Vertragsstaaten AT, BE, CH, DE, DK, ES, FR, GB, IE, IT, LI, NL, PT, SE, FI gelöst.This object is achieved by the features of claim 1 each of the sets of claims for the contracting states GR, LU, MC, CY and for the contracting states AT, BE, CH, DE, DK, ES, FR, GB, IE, IT, LI, NL, PT, SE, FI solved.

Es wurde überraschend herausgefunden, dass durch die Beimischung von Polyurethan-Kunstfasern aus Polybutylenterephthalat in vielen Eigenschaften deutlich verbessert werden können. So bewirkt die Beimischung von Polyurethan vor allem, dass der Abrieb, der aufgrund des Kontaktes zwischen dem Gewebe und den Antriebswalzen z.B. in der Papiermaschine entsteht, wesentlich reduziert wird. Außerdem ergibt sich eine Erhöhung der Flexibilität des Monofils und damit ebenso des daraus gebildeten fertigen Gewebes. Dadurch lassen sich größere Gewebe aufgrund der höheren Geschmeidigkeit besser in die einzelnen, mit umlaufenden Walzen bestückten Papiermaschinensektoren einziehen.It was surprisingly found that through the admixture of polyurethane synthetic fibers from polybutylene terephthalate can be significantly improved in many properties can. This is what the addition of polyurethane does all that abrasion caused by the contact between the fabric and the drive rollers e.g. in the paper machine arises, is significantly reduced. It also results an increase in the flexibility of the monofilament and thus as well of the finished fabric formed from it. This allows larger fabrics better due to the higher suppleness into the individual paper machine sectors equipped with rotating rollers move in.

Darüber hinaus hat sich herausgestellt, dass beim Nadelprozess, z.B. bei der Herstellung eines Nassfilzes, durch den Zusatz von Polyurethan das Spleißen des Monofils verhindert werden kann. Bei einem derartigen Nadelprozess ist es nämlich an sich unvermeidbar, dass eine Anzahl von im Gewebe sich befindenden Monofilen durch die einfahrenden Nadeln beschädigt wird.It also turned out that in the needle process, e.g. in the production of a wet felt through which Addition of polyurethane prevents splicing of the monofilament can be. It is with such a needle process in itself inevitable that a number of in the tissue monofilaments through the retracting needles is damaged.

Eine erfindungsgemäße monofile Kunstfaser läßt sich nach dem üblichen Extrusionsspinnverfahren herstellen. Rohstoff-Trokkenlufttrockner sorgen dabei vorab dafür, dass das Rohstoffgemisch, welches dem Extruder zugeführt wird, nicht einen zu hohen Feuchtigkeitsgehalt aufweist. Als Extruder kommen sowohl Ein- wie auch Doppelschnecken mit und ohne Entgasung zum Einsatz. Alle übrigen Anlagenteile entsprechen den für die Standardmonofilherstellung notwendigen technischen Bedingungen.A monofilament synthetic fiber according to the invention can be after manufacture usual extrusion spinning processes. Commodity Trokkenlufttrockner ensure in advance that the raw material mixture, which is fed to the extruder, not one has a high moisture content. Come as an extruder both single and twin screws with and without degassing for use. All other parts of the system correspond to those for the technical conditions necessary for standard monofilament production.

Als besonders vorteilhaft hat sich eine Zusammensetzung von 1 - 10 Gew.% Polyurethan und ad 100 Gew.% Polybutylenterephthalat herausgestellt.A composition of 1-10% by weight of polyurethane and ad 100% by weight of polybutylene terephthalate exposed.

Besonders bevorzugt eignet sich die erfindungsgemäße monofile Kunstfaser zur Herstellung von Geweben oder Sieben, insbesondere für Papiermaschinenbespannungen. Diese Papiermaschinenbespannungen lassen sich innerhalb der Papiermaschine sowohl in der Siebpartie als auch in der Presspartie als auch in der Trockenpartie einsetzen.The monofilament according to the invention is particularly preferred Synthetic fiber for the production of fabrics or sieves, especially for paper machine clothing. This paper machine clothing can be inside the paper machine both in the wire section and in the press section as well as in the dryer section.

Die Erfindung ist nachstehend anhand von Ausführungsbeispielen näher erläutert: The invention is based on exemplary embodiments explained in more detail:

Beispiel 1:Example 1:

Es wurde zunächst eine dem Stand der Technik entsprechende Kunstfaser aus reinem Polybutylenterephthalat untersucht, und zwar mit einem Fadendurchmesser von 0,22 mm. Dieser Fadendurchmesser wurde deshalb untersucht, da im Naßfilzbereich bei Papiermaschinen ein solcher Faden häufig verwendet wird. Diese Kunstfaser wird nachfolgend als Kunstfaser I bezeichnet.It first became a state of the art Synthetic fiber from pure polybutylene terephthalate examined, with a thread diameter of 0.22 mm. This thread diameter was examined because in the wet felt area Such a thread is often used in paper machines becomes. This synthetic fiber is referred to below as synthetic fiber I.

Beispiel 2:Example 2:

Demgegenüber wurde eine erfindungsgemäße monofile Kunstfaser mit folgender Zusammensetzung untersucht: 95,0 Gew.% Polybutylenterephthalat und 5,0 Gew.% Polyurethan, diese Faser wird nachfolgend als Kunstfaser II bezeichnet. Sie wies ebenfalls einen Durchmesser von 0,22 mm auf.In contrast, a monofilament synthetic fiber according to the invention investigated with the following composition: 95.0% by weight of polybutylene terephthalate and 5.0 wt% polyurethane, this fiber is referred to below as synthetic fiber II. She pointed also a diameter of 0.22 mm.

Beide Kunstfasern wurden jeweils einer Scheuerprüfung unterzogen. Die Ergebnisse sind in der nachfolgenden Tabelle dargestellt: Mechanischtechnologische Daten Kunstfaser I Kunstfaser II Faden-Durchmesser [mm] 0,22 0,22 Bruchkraft [N] 19,1 18,6 Bruchdehnung [%] 36,0 38,0 Hitzeschrumpf [%] 180°C/15 min 4,5 5,0 Both synthetic fibers were subjected to a scrubbing test. The results are shown in the table below: Mechanical-technological data Synthetic fiber I Synthetic fiber II Thread diameter [mm] 0.22 0.22 Breaking strength [N] 19.1 18.6 Elongation at break [%] 36.0 38.0 Heat shrinkage [%] 180 ° C / 15 min 4.5 5.0

(Scheuerprüfung (trocken) - Drehzahl konstant):(Abrasion test (dry) - constant speed):

Kunstfaser ISynthetic fiber I Kunstfaser IISynthetic fiber II Touren [U/min]Tours [RPM] 100100 100100 Zeit [s]Time [s] 1010 1010 Abrieb [%]Abrasion [%] 55 33 Touren [U/min]Tours [RPM] 100100 100100 Zeit [s]Time [s] 2020 2020 Abrieb [%]Abrasion [%] 1313 77 Touren [U/min]Tours [RPM] 100100 100100 Zeit [s]Time [s] 3030 3030 Abrieb [%]Abrasion [%] 2121 1111

Wie sich aus den vorstehenden Untersuchungsergebnissen ergibt, läßt sich deutlich erkennen, daß gegenüber bekannten Kunstfasern aus reinem Polybutylenterephthalat sich mit einer erfindungsgemäßen Kunstfaser die mechanischen Eigenschaften wesentlich verbessern lassen. Insbesondere läßt sich der Abrieb um mehr als 50 % reduzieren.As can be seen from the above test results, can be clearly seen that compared to known Synthetic fibers made from pure polybutylene terephthalate the mechanical properties of a synthetic fiber according to the invention can be significantly improved. In particular, lets abrasion is reduced by more than 50%.

Natürlich ist die Erfindung nicht auf das dargestellte Ausführungsbeispiel beschränkt. Weitere Ausgestaltungen sind möglich, ohne den Grundgedanken zu verlassen.Of course, the invention is not limited to that shown Embodiment limited. Other configurations are possible without leaving the basic idea.

Claims (3)

  1. Monofilament synthetic fibres on a polybuteneterephthalate basis, comprising a blend of polybuteneterephthalate and polyurethane with 1 to 30 % in weight of polyurethane and ad 100 % in weight of polybuteneterephthalate.
  2. Monofilament synthetic fibres in accordance with claim 1, characterised by 1 to 10 % in weight of polyurethane and ad 100 % in weight of polybuteneterephthalate.
  3. Use of a monofilament synthetic fibre in accordance with claim 1 or 2, in woven fabrics or screens, in particular for paper machine coverings.
EP00920434A 1999-03-19 2000-02-11 Synthetic monofilament Revoked EP1169501B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19912371 1999-03-19
DE19912371A DE19912371A1 (en) 1999-03-19 1999-03-19 Monofilament synthetic fiber
PCT/EP2000/001114 WO2000056957A1 (en) 1999-03-19 2000-02-11 Synthetic monofilament

Publications (2)

Publication Number Publication Date
EP1169501A1 EP1169501A1 (en) 2002-01-09
EP1169501B1 true EP1169501B1 (en) 2004-11-10

Family

ID=7901622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00920434A Revoked EP1169501B1 (en) 1999-03-19 2000-02-11 Synthetic monofilament

Country Status (4)

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EP (1) EP1169501B1 (en)
AT (1) ATE282102T1 (en)
DE (2) DE19912371A1 (en)
WO (1) WO2000056957A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE461300T1 (en) 2004-07-06 2010-04-15 Voith Patent Gmbh ABRASION-RESISTANT MONOFILAMENT FOR INDUSTRIAL FABRIC

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE115211T1 (en) * 1989-03-17 1994-12-15 Jwi Ltd STABILIZED POLYURETHANE MODIFIED POLYESTER PAPER MACHINE FABRIC.
US4973512A (en) * 1990-04-03 1990-11-27 Mount Vernon Mills, Inc. Press felt for use in papermaking machine
DE4410399A1 (en) * 1994-03-25 1995-09-28 Hoechst Ag Abrasion-resistant polyester blend with increased processing safety, monofilaments made of it and their production and use
DE19741899A1 (en) * 1997-09-22 1999-03-25 Hahl Erwin Gmbh Synthetic bristles for moving brushes for automatic car wash

Also Published As

Publication number Publication date
WO2000056957A1 (en) 2000-09-28
DE50008599D1 (en) 2004-12-16
DE19912371A1 (en) 2000-09-21
EP1169501A1 (en) 2002-01-09
ATE282102T1 (en) 2004-11-15

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