EP2135982A2 - Monofilaments modified with perfluoropolyethers - Google Patents
Monofilaments modified with perfluoropolyethers Download PDFInfo
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- EP2135982A2 EP2135982A2 EP20090007803 EP09007803A EP2135982A2 EP 2135982 A2 EP2135982 A2 EP 2135982A2 EP 20090007803 EP20090007803 EP 20090007803 EP 09007803 A EP09007803 A EP 09007803A EP 2135982 A2 EP2135982 A2 EP 2135982A2
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- monofilaments
- melt
- spun
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- 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
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- 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
- D01F6/94—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 other polycondensation products
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- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
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- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
Definitions
- the invention relates to a process for the production of monofilaments of fiber-forming polymers which are modified with perfluoropolyethers, processes for their preparation and their use for the production of textile fabrics, in particular of woven fabrics and their use in paper machine clothing, conveyor belts, filtration screens and the like.
- polyesters still leave much to be desired and it is particularly interesting to improve the hydrolysis resistance, but also the dirt-repellent properties and the Abriebeigenschaften. Also, such monofilaments should have the lowest possible coefficient of sliding friction.
- polyester monofilaments are described for papermaking fabrics which have been modified by the addition of a specific copolymer.
- the copolymer which is added in amounts of from 1.5 to 5 percent by weight, is a polynary copolymer obtained from alkenes and perfluoroalkenes, in particular from ethylene and tetrafluoroethylene.
- perfluoroethem As the invention teaches, this document is neither disclosed nor suggested.
- perfluorinated linear polyethers having reactive end groups at each end of the polymer chain. These end groups are COOH groups.
- perfluoropolyethers as the invention teaches, is also not apparent from this American patent. There is also no evidence suggesting the use of such perfluoropolyethers.
- a particular disadvantage is to be observed, namely that the mixing of these polymers is difficult and insufficient.
- the fluoropolymers form more or less well-distributed islands and heterogeneously distributed particles, so that even in unfavorable cases thick spots in the monofilament.
- monofilaments then occur when cleaning and eliminating residual contaminants, especially with high-pressure cleaners disadvantages such as fraying the monofilament surfaces, ie the so-called. Fibrillation, which more or less quickly become the tissues unusable.
- fibrillating or even beginning fibrillating approaches will cause debris to adhere more tightly to the monofilament, require more cleaning time, which is costly and labor intensive, increase fibrillation and ultimately result in faster tissue replacement have to.
- the object of the invention is therefore to provide monofilaments which do not have the disadvantages described above or are improved over the known monofilaments, which in particular have no or only a reduced tendency to fibrillation, which have a reduced roughness and thus are less prone to abrasion , have a reduced soiling tendency, which have a more homogeneous internal structure and therefore, especially when they are used in the form of tissues in paper machines used to be cleaned less frequently and also easier to clean.
- Another object of the monofilaments of the invention is a lower sliding friction resistance. This is associated with a reduced energy consumption in the drive performance of the paper machine.
- This object is achieved by a method for producing a monofilament from a mixture of a melt-spun, thread-forming polymer and a modifying additional polymer, which is characterized in that a mixture of one or more melt-spun yarn-forming polymers and 0.001 to 10 wt. % of a perfluorinated polyether is spun into monofilaments.
- perfluoropolyesters are inert liquids, having molecular weights of about 500 to 6,000 and having no COOH or OH end groups which can react with the polymer to be modified, such as polyesters, polyamides or polycarbonates to form copolymers. They can be represented by the following chemical formula where n is a number corresponding to molecular weights in the range of 500 to 6,000.
- Perfluoropolyethers are commercially available products, the perfluoropolyethers which are particularly suitable according to the invention are oleaginous inert liquids which are also pumpable.
- Du Pont sold under the brand FLUOROGUARD ® perfluoropolyethers are very suitable. They can be obtained, for example, from Du Pont de Nemours (Belgium) BVBA, DuPont Chemical Solution Enterprise, Ketenislaan 1, Haven 1548, B-9130 Kallo, Belgium.
- melt-spinnable yarn-forming polymers are preferably polyesters, polyamides or polycarbonates.
- polyester polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and polybutylene naphthalate are preferably used.
- the polyamides used are preferably PA 6, PA 4.6, PA 6.6, PA 6.10, PA 6.12, PA 11 or PA 12.
- the mixtures also contain stabilizers such as hydrolysis, thermal and / or UV stabilizers.
- Dyes in particular pigment dyes, can also be used in the mixtures.
- the diameter of the monofilaments may be 10 ⁇ m to 2.00 mm, preferably 0.1 mm to 1.00 mm.
- the monofilaments having a round, a non-round cross-section, in particular an oval cross-section, but also to spin with an n-angular cross-section with n ⁇ 3.
- FIG. 1 corresponds to.
- Another object of the invention are monofilaments which are composed of a mixture of one or more melt-spun yarn-forming polymers containing 0.001 to 10 wt .-%, preferably 0.01 to 1 wt .-% of a perfluorinated polyether.
- a monofilament under constant tension is pulled over a knife blade.
- the number of double strokes is counted until the thread breaks.
- the measure of fibrillation tendency can be the cam impact test: the number of splits after 1000 hammer blows is counted at different points of the monofilament; usually the fibrillation tendency is assessed visually after the high pressure shower test.
- An article is therefore monofilaments which are composed of a mixture of one or more melt-spun yarn-forming polymers containing 0.001 to 10 wt .-%, preferably 0.01 to 1 wt .-% of a perfluorinated polyether.
- the soiling tendency is reduced (possibly because of the hydrophobic surface), the sliding resistance and thus the abrasion are reduced. Due to the reduced sliding resistance also the drive power of the paper machine and thus their energy consumption is reduced.
- Another object of the invention is the use of the outlined above monofilaments for the production of textile fabrics, in particular of textile and technical fabrics.
- Another object of the invention is the use of textile or technical fabrics for the production of paper machine clothing, conveyor belts, filtration sieves and sieves for screen printing.
- Melt spinnable yarn-forming polymers have been known for a long time and their preparation is well known to those of ordinary skill in the art.
- polyesters such as polyethylene terephthalate are emphasized here.
- Perfluorinated polyethers are also known polymers. In this context, reference is made to R ⁇ MPP Lexikon Chemie 10th, completely revised edition on page 3181; It is based on the disclosure given there and incorporated herein by reference.
- the perfluoropolyethers are preferably added in the form of masterbatches. Suitable masterbatches are sold by RTP Company, 580 East Front Street, Winona, MN 55987, USA, e.g. B. under the type designation 1099X99974.
- a melt is produced from the components to be spun, which is spun through a nozzle which gives the exiting monofilaments a corresponding cross-section.
- the mixture to be spun is generally melted in an extruder and then by means of a melt pump through the nozzle pressed.
- the shaped article is generally passed through a cooling medium with a delay of 1: 1.1 to 1: 5, preferably water at a temperature of 10 ° C to 90 ° C.
- the yarn obtained is on or repeatedly stretched and heat-set until it has the desired dimensions, ie the desired titer.
- the delivery rate, if necessary, the delay and the stretching are coordinated so that the obtained monofilament has a diameter of about 100 microns to 5 mm, in particular 0.1 to 2 mm.
- nozzles nozzles with a simple round cross section or oval cross section can be used. But it is also possible threads with profiled cross section, z. Square or n-shaped, where n ⁇ 3.
- thermal and UV light resistance conventional agents can be used.
- monomeric and polymeric carbodiimides are suitable.
- dyes especially pigment dyes are used.
- the fabrics which are used in paper machine clothing are outstandingly suitable both in the wet end and in the following lots, especially in the dryer section.
- the monofilaments are characterized by a special homogeneous structure.
- the invention is explained in more detail by the following example:
- the monofilament type 0.50 mm 910 CK white was used, which contains 15% of a classic fluoropolymer in PET.
- the textile data is shown in the table.
- On line number 20 20 polymer base polymer RT12 * RT12 * additive 4.0% RTP 1099X99974 ** 15.0% PVDF *** 0.7% stabilizer 0.7% stabilizer
- the diameters and titers titres dtex 2818 2826 Diameter x microns 503 503 breaking strength CN / tex 34.3 33.4 N 96.8 94.4 elongation % 37.9 35.6 relative elongation at 15cN / tex % 10.5 10.5 at 20 cN / tex % 16.0 16.0 at 27 cN / tex % 22.5
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Paper (AREA)
- Woven Fabrics (AREA)
- Printing Plates And Materials Therefor (AREA)
- Knitting Of Fabric (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Monofilamenten aus Faser bildenden Polymeren, welche mit Perfluorpolyethern modifiziert sind, Verfahren zu deren Herstellung sowie deren Verwendung zur Herstellung von textilen Flächengebilden insbesondere von Geweben und deren Einsatz in Papiermaschinenbespannungen, Förderbändern, Filtrationssieben und dergleichen.The invention relates to a process for the production of monofilaments of fiber-forming polymers which are modified with perfluoropolyethers, processes for their preparation and their use for the production of textile fabrics, in particular of woven fabrics and their use in paper machine clothing, conveyor belts, filtration screens and the like.
Es ist bekannt Monofile aus synthetischen Polymeren, insbesondere solche aus Polyestern zu modifizieren.It is known to modify monofilaments of synthetic polymers, in particular those of polyesters.
Die Modifizierung wird deshalb vorgenommen, weil die an sich recht guten Eigenschaften von Polyestern noch zu wünschen übrig lassen und man besonders interessiert ist, die Hydrolysebeständigkeit, aber auch die Schmutz abweisenden Eigenschaften sowie die Abriebeigenschaften zu verbessern. Auch sollen derartige Monofilamente einen möglichst geringen Gleitreibungskoeffizienten besitzen.The modification is made because the quite good properties of polyesters still leave much to be desired and it is particularly interesting to improve the hydrolysis resistance, but also the dirt-repellent properties and the Abriebeigenschaften. Also, such monofilaments should have the lowest possible coefficient of sliding friction.
Es wurden bereits viele Versuche gemacht, insbesondere bei Polyestermonofilamenten, die entsprechenden erwünschten Eigenschaften zu erreichen und die nachteiligen Eigenschaften zu reduzieren. So ist bekannt, Monofile aus Polyestern herzustellen, die durch Zusatz von Polytetrafluorethylen modifiziert wurden.Many attempts have been made, especially with polyester monofilaments, to achieve the corresponding desired properties and reduce the disadvantageous properties. It is known to produce monofilaments of polyesters which have been modified by the addition of polytetrafluoroethylene.
Ähnliche Monofilamente aus Polyestern werden in der
In der
In der
Ganz abgesehen davon werden in dieser Veröffentlichung zwar Fasern und Filme erwähnt und insbesondere auf die Herstellung von Formkörpern, wie geblasenen Gegenständen, Flaschen für Nahrungsmittel und Getränke hingewiesen, Monofilamente werden jedoch nicht benannt, noch finden sich Hinweise, die die Verwendung dieser mit Copolymeren modifizierten Polyester auch bei der Herstellung von Monofilamenten einzusetzen.Quite apart from this, although fibers and films are mentioned in this publication and particularly pointed to the production of moldings, such as blown articles, bottles for food and beverages, monofilaments are not named, nor are there any indications that the use of these copolymer-modified polyester also to be used in the production of monofilaments.
Schließlich werden in der
Zudem bewirkt das Fibrillieren oder sogar schon beginnende Ansätze zum Fibrillieren, dass Schmutzreste fester am Monofilament haften bleiben, länger gereinigt werden muss, was kosten- und arbeitsintensiv ist, zum anderen die Fibrillierung verstärkt und schließlich dazu führt, dass die Gewebe in kürzerem Rhythmus ausgetauscht werden müssen.In addition, fibrillating or even beginning fibrillating approaches will cause debris to adhere more tightly to the monofilament, require more cleaning time, which is costly and labor intensive, increase fibrillation and ultimately result in faster tissue replacement have to.
Aufgrund der Rauhigkeit ist auch der Abrieb bei derartigen Monofilamenten relativ hoch.Due to the roughness and the abrasion is relatively high in such monofilaments.
Es besteht somit noch ein Bedürfnis nach verbesserten Monofilamenten sowie nach Verfahren zur Herstellung derartiger Monofilamente, insbesondere Monofilamenten, die in Form von Geweben und Sieben beispielsweise bei Papiermaschinenbespannungen, Förderbändern oder Filtrationssieben eingesetzt werden können.There is therefore still a need for improved monofilaments and for processes for producing such monofilaments, in particular monofilaments, which can be used in the form of fabrics and fabrics, for example in paper machine clothing, conveyor belts or filtration screens.
Aufgabe der Erfindung ist es deshalb Monofilamente zur Verfügung zu stellen, welche die vorstehend geschilderten Nachteile nicht aufweisen oder gegenüber den bekannten Monofilamenten verbessert sind, die insbesondere keine oder nur eine verringerte Neigung zur Fibrillation aufweisen, die eine verringerte Rauheit besitzen und damit weniger zu Abrieb neigen, eine verringerte Anschmutzneigung aufweisen, die eine homogenere innere Struktur besitzen und die deshalb, insbesondere wenn sie in Form von Geweben bei Papiermaschinen zum Einsatz gelangen, weniger häufig gereinigt werden müssen und sich auch leichter reinigen lassen.The object of the invention is therefore to provide monofilaments which do not have the disadvantages described above or are improved over the known monofilaments, which in particular have no or only a reduced tendency to fibrillation, which have a reduced roughness and thus are less prone to abrasion , have a reduced soiling tendency, which have a more homogeneous internal structure and therefore, especially when they are used in the form of tissues in paper machines used to be cleaned less frequently and also easier to clean.
Ein weiteres Ziel der erfindungsgemäßen Monofilamente ist ein geringerer Gleitreibungswiderstand. Damit verbunden ist ein verringerter Energieverbrauch in der Antriebsleistung der Papiermaschine.Another object of the monofilaments of the invention is a lower sliding friction resistance. This is associated with a reduced energy consumption in the drive performance of the paper machine.
Diese Aufgabe wird gelöst durch ein Verfahren zur Herstellung eines Monofilament aus einem Gemisch eines schmelzspinnbaren, Faden bildenden Polymer und einem modifizierendem zusätzlichen Polymer, das dadurch gekennzeichnet ist, dass man ein Gemisch aus einem oder mehreren schmelzspinnbaren, Faden bildenden Polymeren und 0,001 bis 10 Gew.-% eines perfluorierten Polyethers zu Monofilamenten verspinnt.This object is achieved by a method for producing a monofilament from a mixture of a melt-spun, thread-forming polymer and a modifying additional polymer, which is characterized in that a mixture of one or more melt-spun yarn-forming polymers and 0.001 to 10 wt. % of a perfluorinated polyether is spun into monofilaments.
Bei diesen Perfluorpolyehtem handelt es sich um inerte Flüssigkeiten, mit Molmassen von ca. 500 bis 6 000 und die keine COOH- oder OH-Endgruppen aufweisen, die mit dem zu modifizierenden Polymer wie Polyester, Polyamide oder Polycarbonate unter Bildung von Copolymeren reagieren können. Sie können durch folgende chemische Formel dargestellt werden,
Perfluorpolyether sind im Handel erhältliche Produkte, die gemäß der Erfindung besonders geeigneten Perfluorpolyether sind ölartige inerte Flüssigkeiten, die auch pumpbar sind.Perfluoropolyethers are commercially available products, the perfluoropolyethers which are particularly suitable according to the invention are oleaginous inert liquids which are also pumpable.
Sehr geeignet sind auch die von der Firma Du Pont unter der Marke FLUOROGUARD® vertriebenen Perfluorpolyether. Sie sind zum Beispiel von der Firma Du Pont de Nemours (Belgien) BVBA, DuPont Chemical Solution Enterprise, Ketenislaan 1, Haven 1548, B-9130 Kallo, Belgien, zu erhalten.Very suitable are the by Du Pont sold under the brand FLUOROGUARD ® perfluoropolyethers. They can be obtained, for example, from Du Pont de Nemours (Belgium) BVBA, DuPont Chemical Solution Enterprise, Ketenislaan 1, Haven 1548, B-9130 Kallo, Belgium.
Als schmelzspinnbare, Faden bildende Polymere werden bevorzugt Polyester, Polyamide oder Polycarbonate.The melt-spinnable yarn-forming polymers are preferably polyesters, polyamides or polycarbonates.
Als Polyester werden bevorzugt Polyethylenterephthalat, Polypropylenterephthalat, Polybutylenterephthalat, Polyethylennaphthalat und Polybutylennaphthalat verwendet.As the polyester, polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and polybutylene naphthalate are preferably used.
Als Polyamide wird bevorzugt PA 6, PA 4.6, PA 6.6, PA 6.10, PA 6.12, PA 11 oder PA 12 verwendet.The polyamides used are preferably
Es können auch Mischungen der vorgenannten Polymeren verwendet werden.It is also possible to use mixtures of the abovementioned polymers.
Es ist vorteilhaft, wenn die Gemische auch Stabilisatoren wie Hydrolyse-, Thermo-und/oder UV-Stabilisatoren enthalten.It is advantageous if the mixtures also contain stabilizers such as hydrolysis, thermal and / or UV stabilizers.
In den Gemischen können auch Farbstoffe, insbesondere Pigmentfarbstoffe eingesetzt werden.Dyes, in particular pigment dyes, can also be used in the mixtures.
Der Durchmesser der Monofilamente kann 10 µm bis 2,00 mm betragen, bevorzugt 0,1 mm bis 1,00 mm.The diameter of the monofilaments may be 10 μm to 2.00 mm, preferably 0.1 mm to 1.00 mm.
Es ist möglich, die Monofilamente mit einem runden, einem nicht runden Querschnitt insbesondere einem ovalen Querschnitt herzustellen, aber auch mit einem n-eckigen Querschnitt mit n ≥ 3 zu spinnen.It is possible to produce the monofilaments having a round, a non-round cross-section, in particular an oval cross-section, but also to spin with an n-angular cross-section with n ≥ 3.
Entsprechende Querschnitte sind der
Ein weiterer Gegenstand der Erfindung sind Monofilamente, die aufgebaut sind aus einem Gemisch aus einem oder mehreren schmelzspinnbaren, Faden bildenden Polymeren, das 0,001 bis 10 Gew.-%, bevorzugt 0,01 bis 1 Gew.-% eines perfluorierten Polyethers enthält.Another object of the invention are monofilaments which are composed of a mixture of one or more melt-spun yarn-forming polymers containing 0.001 to 10 wt .-%, preferably 0.01 to 1 wt .-% of a perfluorinated polyether.
Sie werden bevorzugt nach einem der vorstehend angegebenen Verfahren erhalten. Ein Gegenstand der Erfindung sind deshalb auch Monofilamente erhalten nach einem der vorstehend beschriebenen Verfahren.They are preferably obtained by one of the methods given above. An object of the invention are therefore also monofilaments obtained by one of the methods described above.
Diese Monofilamente zeichnen sich u. a. durch folgende Eigenschaften aus: Geringer Abrieb und geringe Fibrillationsneigung.These monofilaments are u. a. due to the following properties: low abrasion and low fibrillation tendency.
Als Maßzahl für den Abrieb kann z. B. der Messerscheuertest (knife edge test) herangezogen werden.As a measure of the abrasion z. B. the knife edge test (knife edge test) are used.
Ein Monofil unter konstanter Vorspannung wird über eine Messerklinge gezogen. Gezählt wird die Zahl der Doppelhübe bis zum Fadenbruch.A monofilament under constant tension is pulled over a knife blade. The number of double strokes is counted until the thread breaks.
Maßzahl zur Fibrillationsneigung kann der Nockenschlagtest sein: Gezählt wird die Zahl der Aufspleissungen nach 1000 Hammerschlägen an verschiedenen Stellen des Monofils; gewöhnlich wird die Fibrillationsneigung nach dem high pressure shower test (Hochdruckwasserstrahltest) visuell beurteilt.The measure of fibrillation tendency can be the cam impact test: the number of splits after 1000 hammer blows is counted at different points of the monofilament; usually the fibrillation tendency is assessed visually after the high pressure shower test.
Ein Gegenstand sind deshalb Monofilamente, die aufgebaut sind aus einem Gemisch aus einem oder mehreren schmelzspinnbaren, Faden bildenden Polymeren, das 0,001 bis 10 Gew.-%, bevorzugt 0,01 bis 1 Gew.-% eines perfluorierten Polyethers enthält.An article is therefore monofilaments which are composed of a mixture of one or more melt-spun yarn-forming polymers containing 0.001 to 10 wt .-%, preferably 0.01 to 1 wt .-% of a perfluorinated polyether.
Durch den perfluorierten Polyether wird die Anschmutzneigung herabgesetzt (möglicherweise wegen der hydrophoben Oberfläche), der Gleitwiderstand und damit der Abrieb verringert. Durch den verringerten Gleitwiderstand wird zudem die Antriebsleistung der Papiermaschine und damit deren Energieverbrauch herabgesetzt.Due to the perfluorinated polyether, the soiling tendency is reduced (possibly because of the hydrophobic surface), the sliding resistance and thus the abrasion are reduced. Due to the reduced sliding resistance also the drive power of the paper machine and thus their energy consumption is reduced.
Ein weiterer Gegenstand der Erfindung ist die Verwendung der vorstehend umrissenen Monofilamente zur Herstellung von textilen Flächengebilden, insbesondere von textilen und technischen Geweben.Another object of the invention is the use of the outlined above monofilaments for the production of textile fabrics, in particular of textile and technical fabrics.
Ein weiterer Gegenstand der Erfindung ist die Verwendung der textilen oder technischen Gewebe zur Herstellung von Papiermaschinenbespannungen, Förderbändern, Filtrationssieben und Sieben für den Siebdruck.Another object of the invention is the use of textile or technical fabrics for the production of paper machine clothing, conveyor belts, filtration sieves and sieves for screen printing.
Schmelzspinnbare, Faden bildende Polymere sind seit langem bekannt, und deren Herstellung ist dem Durchschnittsfachmann geläufig.Melt spinnable yarn-forming polymers have been known for a long time and their preparation is well known to those of ordinary skill in the art.
Es können grundsätzlich alle üblichen Faden bildenden Polymere verwendet werden. Hier seien insbesondere Polyester wie Polyethylenterephthalat hervorgehoben.In principle, all customary yarn-forming polymers can be used. In particular, polyesters such as polyethylene terephthalate are emphasized here.
Auch perfluorierte Polyether sind an sich bekannte Polymere. In diesem Zusammenhang wird auf RÖMPP Lexikon Chemie 10., völlig überarbeitete Auflage auf Seite 3181 verwiesen; es wird sich auf die dort angegebene Offenbarung bezogen und hiermit einbezogen.Perfluorinated polyethers are also known polymers. In this context, reference is made to RÖMPP Lexikon Chemie 10th, completely revised edition on page 3181; It is based on the disclosure given there and incorporated herein by reference.
Die Perfluorpolyether werden bevorzugt in Form von Masterbatches zugesetzt. Geeignete Masterbatches werden von der Firma RTP Company, 580 East Front Street, Winona, MN 55987, USA vertrieben, z. B. unter der Typenbezeichnung 1099X99974.The perfluoropolyethers are preferably added in the form of masterbatches. Suitable masterbatches are sold by RTP Company, 580 East Front Street, Winona, MN 55987, USA, e.g. B. under the type designation 1099X99974.
Die Herstellung von Monofilen an sich ist auch bereits seit längerem bekannt, und der Durchschnittsfachmann kann das Verspinnen von Polymeren zu Monofilen ohne erfinderisch tätig zu werden, durchführen.The production of monofilaments per se has also been known for some time, and one of ordinary skill in the art can carry out the spinning of polymers into monofilaments without being inventive.
Im Allgemeinen wird aus den zu verspinnenden Komponenten eine Schmelze hergestellt, die durch eine Düse, welcher den austretenden Monofilamenten einen entsprechenden Querschnitt erteilt, versponnen. Das zu verspinnende Gemisch wird im Allgemeinen in einem Extruder aufgeschmolzen und dann mit Hilfe einer Schmelzpumpe durch die Düse gepresst. Von der Düse kommend wird das geformte Gebilde im Allgemeinen mit einem Verzug von 1:1,1 bis 1:5 durch ein Kühlmedium geleitet, vorzugsweise Wasser mit einer Temperatur von 10° C bis 90° C. Sodann wird der erhaltene Faden ein- oder mehrfach verstreckt und thermofixiert bis er die gewünschten Ausmaße, d. h. den gewünschten Titer, aufweist.In general, a melt is produced from the components to be spun, which is spun through a nozzle which gives the exiting monofilaments a corresponding cross-section. The mixture to be spun is generally melted in an extruder and then by means of a melt pump through the nozzle pressed. Coming from the nozzle, the shaped article is generally passed through a cooling medium with a delay of 1: 1.1 to 1: 5, preferably water at a temperature of 10 ° C to 90 ° C. Then, the yarn obtained is on or repeatedly stretched and heat-set until it has the desired dimensions, ie the desired titer.
Die Fördermenge, ggf. der Verzug und die Verstreckung werden so auf einander abgestimmt, dass das erhaltene Monofilament einen Durchmesser von etwa 100 µm bis 5 mm insbesondere 0,1 bis 2 mm erreicht. Als Düsen können Düsen mit einfachem Rundquerschnitt oder ovalem Querschnitt verwendet werden. Es ist aber auch möglich, Fäden mit profiliertem Querschnitt, z. B. viereckig oder n-eckig, wobei n ≥ 3 ist, herzustellen.The delivery rate, if necessary, the delay and the stretching are coordinated so that the obtained monofilament has a diameter of about 100 microns to 5 mm, in particular 0.1 to 2 mm. As nozzles nozzles with a simple round cross section or oval cross section can be used. But it is also possible threads with profiled cross section, z. Square or n-shaped, where n≥3.
Als Stabilisatoren insbesondere solche zur Verbesserung der Hydrolyse-, Thermo- und UV-Lichtbeständigkeit können übliche Agenzien eingesetzt werden. Zur Verbesserung der Hydrolysebeständigkeit sind insbesondere monomere und polymere Carbodiimide geeignet.As stabilizers, in particular those for improving the hydrolysis, thermal and UV light resistance conventional agents can be used. To improve the hydrolysis resistance, in particular monomeric and polymeric carbodiimides are suitable.
Als Farbstoffe werden vor allem Pigmentfarbstoffe eingesetzt.As dyes, especially pigment dyes are used.
Die Herstellung von textilen Flächengebilden insbesondere auch von textilen und technischen Geweben sind an sich ebenfalls dem Durchschnittsfachmann bekannt.The production of textile fabrics, in particular also of textile and technical fabrics, are also known per se to those skilled in the art.
Die Gewebe, welche aus Bespannungen bei Papiermaschinen eingesetzt werden, sind sowohl in der Nasspartie als auch in den folgenden Partien insbesondere auch in der Trockenpartie hervorragend geeignet.The fabrics which are used in paper machine clothing are outstandingly suitable both in the wet end and in the following lots, especially in the dryer section.
Die Monofile zeichnen sich durch eine besondere homogene Struktur aus. Die Erfindung wird durch folgendes Beispiel näher erläutert:The monofilaments are characterized by a special homogeneous structure. The invention is explained in more detail by the following example:
In den PET-Hauptstrom im Fallrohr des Extruders wurden gravimetrisch 4 % des Masterbatches RTP 1099 X 99974 zudosiert, im Extruder aufgeschmolzen, über eine Zahnradpumpe in ein Spinnpack gedrückt, durch eine Düsenplatte zu feinen, runden Strängen versponnen, in einem Spinnbad abgeschreckt, mehrfach unter Wärmeeinwirkung über Galetten verstreckt und als Einzelfilamente mit einem Durchmesser von 0,50 mm aufgespult. Die Zudosierung von 4 % Masterbatch in den Schnitzelstrom vor der Extrusion entspricht < 1 Gew.-% PFPE im fertigen Monofilament. Dabei wurde gemäß folgenden Fahrdaten gearbeitet:4% of masterbatch RTP 1099 X 99974 were gravimetrically metered into the main PET stream in the downpipe of the extruder, melted in the extruder, forced into a spin pack via a gear pump, spun through a nozzle plate into fine, round strands, Quenched in a spin bath, stretched several times under heat through godets and wound up as individual filaments with a diameter of 0.50 mm. The metered addition of 4% masterbatch into the chip stream prior to extrusion corresponds to <1 wt.% PFPE in the finished monofilament. The following driving data were used:
Als Referenz wurde die Monofilament-Type 0,50 mm 910 CK weiss herangezogen, die 15 % eines klassischen Fluorpolymeren in PET enthält. Die Textildaten sind in der Tabelle wiedergegeben.
** = Masterbatch der Firma RTP Company, 580 East Front Street, Winona, MN 55987, USA
*** = PVDF = Polyvinylidenfluorid
** = Masterbatch from RTP Company, 580 East Front Street, Winona, MN 55987, USA
*** = PVDF = polyvinylidene fluoride
Zur Prüfung der Fibrillationsneigung wurden die Monofilamente auf einer Metallplatte parallel liegend aufgewickelt und mit einem Hochdruck-Wasserstrahl von 300 bar beschossen. Im Ergebnis zeigen die erfindungsgemäßen Monofilamente keine Fibrillation, während das unter gleichen Bedingungen behandelte Referenzmuster starke Fibrillationen aufwies.To test the Fibrillationsneigung the monofilaments were wound up lying parallel on a metal plate and bombarded with a high-pressure water jet of 300 bar. As a result, the monofilaments of the present invention show no fibrillation, while the reference pattern treated under the same conditions had strong fibrillations.
Claims (15)
Applications Claiming Priority (1)
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DE200810028617 DE102008028617A1 (en) | 2008-06-18 | 2008-06-18 | Monofilaments modified with perfluoropolyethers |
Publications (2)
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EP2135982A2 true EP2135982A2 (en) | 2009-12-23 |
EP2135982A3 EP2135982A3 (en) | 2010-05-26 |
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Family Applications (1)
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EP20090007803 Withdrawn EP2135982A3 (en) | 2008-06-18 | 2009-06-13 | Monofilaments modified with perfluoropolyethers |
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US (1) | US20090318047A1 (en) |
EP (1) | EP2135982A3 (en) |
JP (1) | JP2010001596A (en) |
DE (1) | DE102008028617A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012221053A1 (en) | 2012-11-19 | 2014-06-05 | Voith Patent Gmbh | Paper machine covering for use in press section of machine for manufacturing fibrous material web e.g. paper, has basic structure provided with monofilaments that are aligned in cross machine direction and set with anisotropic rigidity |
Families Citing this family (4)
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JP2011160399A (en) | 2010-01-06 | 2011-08-18 | Sony Ericsson Mobile Communications Ab | Slide rotation device, slide rotation method, and portable terminal device |
FI20115099L (en) | 2011-01-31 | 2012-08-01 | Metso Fabrics Oy | Shoe press belt, method of making it and use in a shoe press |
US20140329623A1 (en) * | 2013-05-02 | 2014-11-06 | Diadem Sports, LLC | String for sports racquet and sports racquet with improved string |
EP3795636A1 (en) * | 2019-09-20 | 2021-03-24 | SABIC Global Technologies B.V. | Use of per-fluorinated polyethers for modification of polycarbonate copolymers |
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US3847978A (en) | 1968-07-01 | 1974-11-12 | Montedison Spa | Perfluorinated linear polyethers having reactive terminal groups at both ends of the chain and process for the preparation thereof |
EP0506983A1 (en) | 1990-10-19 | 1992-10-07 | Toray Industries, Inc. | Polyester monofilament |
EP0617743B1 (en) | 1992-09-01 | 1999-07-14 | Rhodia Filtec AG | Dirt-repellent monofilament for paper machine filters, process for its production and its use |
DE69424510T2 (en) | 1993-12-06 | 2001-01-18 | Ausimont S.P.A., Mailand/Milano | Fluorine-modified polyester with improved processability |
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US5132455A (en) * | 1982-03-31 | 1992-07-21 | Exfluor Research Corporation | Method for synthesizing perfluorinated ether compounds via polyesters |
US5143963A (en) * | 1989-12-06 | 1992-09-01 | Res Development Corp. | Thermoplastic polymers with dispersed fluorocarbon additives |
JP2631911B2 (en) * | 1989-12-06 | 1997-07-16 | アールイーエス ディベロップメント コーポレーション | Thermoplastic polymer with fluorocarbon additives dispersed |
US5459188A (en) * | 1991-04-11 | 1995-10-17 | Peach State Labs, Inc. | Soil resistant fibers |
JP3246026B2 (en) * | 1992-04-23 | 2002-01-15 | ダイキン工業株式会社 | Water and oil repellent fiber |
DE19511853A1 (en) * | 1995-03-31 | 1996-10-02 | Hoechst Trevira Gmbh & Co Kg | Heavy-duty core / sheath monofilaments for technical applications |
ITMI20062308A1 (en) * | 2006-11-30 | 2008-06-01 | Solvay Solexis Spa | ADDITIVES FOR HALO-POLYMERS |
-
2008
- 2008-06-18 DE DE200810028617 patent/DE102008028617A1/en not_active Withdrawn
-
2009
- 2009-06-13 EP EP20090007803 patent/EP2135982A3/en not_active Withdrawn
- 2009-06-16 US US12/485,524 patent/US20090318047A1/en not_active Abandoned
- 2009-06-18 JP JP2009144846A patent/JP2010001596A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3847978A (en) | 1968-07-01 | 1974-11-12 | Montedison Spa | Perfluorinated linear polyethers having reactive terminal groups at both ends of the chain and process for the preparation thereof |
EP0506983A1 (en) | 1990-10-19 | 1992-10-07 | Toray Industries, Inc. | Polyester monofilament |
EP0617743B1 (en) | 1992-09-01 | 1999-07-14 | Rhodia Filtec AG | Dirt-repellent monofilament for paper machine filters, process for its production and its use |
DE69424510T2 (en) | 1993-12-06 | 2001-01-18 | Ausimont S.P.A., Mailand/Milano | Fluorine-modified polyester with improved processability |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012221053A1 (en) | 2012-11-19 | 2014-06-05 | Voith Patent Gmbh | Paper machine covering for use in press section of machine for manufacturing fibrous material web e.g. paper, has basic structure provided with monofilaments that are aligned in cross machine direction and set with anisotropic rigidity |
Also Published As
Publication number | Publication date |
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DE102008028617A1 (en) | 2009-12-24 |
EP2135982A3 (en) | 2010-05-26 |
US20090318047A1 (en) | 2009-12-24 |
JP2010001596A (en) | 2010-01-07 |
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