EP0136727B1 - Mit schmierenden Partikeln imprägniertes aromatisches Polyamidgarn, Verfahren zur Herstellung dieses Garnes und dasselbe enthaltendes Dichtungsmaterial oder Seil - Google Patents

Mit schmierenden Partikeln imprägniertes aromatisches Polyamidgarn, Verfahren zur Herstellung dieses Garnes und dasselbe enthaltendes Dichtungsmaterial oder Seil Download PDF

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Publication number
EP0136727B1
EP0136727B1 EP84200913A EP84200913A EP0136727B1 EP 0136727 B1 EP0136727 B1 EP 0136727B1 EP 84200913 A EP84200913 A EP 84200913A EP 84200913 A EP84200913 A EP 84200913A EP 0136727 B1 EP0136727 B1 EP 0136727B1
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Prior art keywords
yarn
weight
solid particles
particles
filaments
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EP84200913A
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English (en)
French (fr)
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EP0136727A1 (de
EP0136727B2 (de
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Willem Carel Van Anholt
Martinus Wilhelmus M. G. Peters
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Akzo NV
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Akzo NV
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/256—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing fluorine
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • D02G1/164—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam in the presence of a liquid, e.g. a crimp finish

Definitions

  • the invention relates to a yarn comprising aromatic polyamides, which yarn is impregnated with a dispersion containing solid, lubricating particles, particularly particles of polytetrafluoroethylene.
  • the invention also comprises a process for the manufacture of such yarn, and packing material, for instance stuffing box packing, containing said yarn.
  • a yarn of the type indicated above is known from US-A-4 371 180, which describes packing composed of braided inorganic yarns, preferably of glass, and of braided organic yarns, preferably of polytetrafluoroethylene or wholly aromatic polyamides. Before or after being braided, the yarn may be impregnated with a dispersion of solid particles of a fluorine-containing polymer and starch.
  • the dispersion containing polytetrafluoroethylene (PTFE) particles contributes considerably to the sealing properties of the end product in the form of packing material.
  • DE-A-23 26 826 describes a blended yarn consisting of 50-80% by weight of PTFE filaments and 50-20% by weight of aromatic polyamide filaments. Said blended yarn is coated with fine PTFE particles and may in the braided form be used as packing material. Before these two yarns are coated with PTFE particles, they must be assembled, which may optionally be effected by the blowing process described in US-A-3 110 151. This blowing process results in a smooth yarn free of loops and therefore not bulky or textured. Coating such a yarn with PTFE particles will consequently result in these particles being practically entirely present on the outside of the yarn. Further, considering that the yarn according to DE-A-23 26 826 is a blend of two yarns having widely different properties, it is less homogeneous than a yarn of one and the same material.
  • EP-A-0 032 744 discloses a wholly aromatic polyamide yarn provided with a fluoro compounds-containing polymer.
  • the fluoro compound is not present on the fibres in the form of separate particles, but in the form of a continuous coating.
  • the PTFE is not present then on the fibres in the form of separate particles, this known yarn is not suitable to be used as packing yarn.
  • CA-A 995 288 describing a hovercraft skirt containing an elastomer coated fabric composed of looped yarn textured by air under pressure, which yarns preferably consist of wholly aromatic polyamides. Therefore, looped yarns of aramids textured under air pressure are known in themselves from CA-A-995 288, but their field of appliation is entirely different and they are not at all meant to be used in combination with PTFE particles.
  • the yarn according to the invention consists of aromatic polyamide endless filaments which are impregnated with a dispersion containing solid lubricating particles of polyfluorocarbon resins, more particularly PTFE, and/or graphite, wherein the yarn is a tangled yarn interlaced by a fluid-jet process.
  • the solid particles may consist of a polyfluorocarbon resin, more particularly polytetrafluoroethylene, or of graphite. Alternatively, however, use may be made of a mixture of solid particles of a polyfluorocarbon resin and of graphite.
  • the wet yarn subjected to a fluid-jet treatment according to the invention has a voluminous character, which renders the yarn according to the invention particularly suitable for taking up a lubricant. Owing to its voluminous character the yarn will readily absorb a large amount of lubricant, which makes the yarn according to the invention particularly suitable to be formed into a packing material.
  • lubricants commonly used in the packing industry for impregnating yarns may be mentioned: paraffin oil, silicone oil or molybdenum disulphide or some other suitable lubricant, depending on the field of application of the packing to be manufactured.
  • the invention comprises in particular a yarn which is so voluminous that the absorption capacity for a lubricant of the polyfluorocarbon particles-containing yarn is in the range of 20 to 50 per cent by weight, preferably in the order of 35 per cent by weight, calculated on the weight of the dry yarn provided with solid PTFE and/or graphite particles.
  • the lubricant contributes considerably to the gas and/or liquid tightness and the frictional behaviour of a packing material.
  • the aramid yarn according to the invention is capable of ensuring a long service life as far as high gas and/or liquid tightness and lubricating effect are concerned.
  • the yarn contains 1000 to 20 000 filaments, preferably about 5000 filaments, and the linear density of the yarn is in the range of tex 150 to 3000, preferably in the order of tex 850.
  • the yarn need contain only a relatively small proportion of solid PTFE and/or graphite particles, namely less than 60 per cent by weight, preferably 10-45% by weight, and more particularly about 20% by weight, calculated on the dry weight of the yarn without the solid particles.
  • the size of 80% of the solid particles is preferably in the range of about 0,1 to 1 pm.
  • the yarn according to the invention is particularly characterized in that the solid particles are so evenly applied to the yarn that measured in a random cross-section of the yarn at least 50%, preferably 70% to 100% of the number of filaments are provided with one or more of said particles.
  • the special configuration of the yarn due to the wet-blowing process permits a particular uniform distribution of the PTFE particles over the cross-sectional area of the yarn.
  • the function of the PTFE particles present in the yarn i.e. promoting the sealing action of the packing material, is rendered most effective.
  • the PTFE particles enhance the chemical resistance of the packing material and reduce friction.
  • the yarn according to the invention can therefore be formed into a packing material which ensures sufficient sealing over a long service time even under high dynamic loads, as in the case of high speed shafts or reciprocating parts in combination with elevated temperature and pressure and, possibly, a chemically agressive medium.
  • Another advantage of the uniform distribution of the PTFE particles in the yarn according to the invention consists in that the packing into which the yarn is braided need not be additionally impregnated with a PTFE particles-containing dispersion.
  • the yarn according to the invention has been especially developed and made suitable to be worked up into a packing material, such as stuffing box packing, which is widely used in machine construction for the sealing of rotating shafts and reciprocating parts.
  • a packing material such as stuffing box packing
  • a number of yarns of the invention impregnated with PTFE and/or graphite particles can be braided together on a packing braiding machine to form a packing material which may for instance have a rectangular cross-section.
  • the braided packing material is generally impregnated with a lubricating agent, such as a special oil, fat or other substances required in view of the use of the packing material.
  • the proportion by weight of solid particles, calculated on the dry weight of the aramid yarn without solid particles, may be lower than 60%, and is preferably 10 to 45%.
  • the invention particularly comprises a packing material of aromatic polyamide yarn impregnated with solid PTFE and/or graphite particles, which packing material is characterized in that it contains a fairly large amount of said lubricating agent, viz. an amount of 20 to 50% by weight, preferably about 25% by weight, calculated on the weight of the dry yarn provided with solid particles.
  • a simple and effective method of manufacturing the yarn according to the invention comprises the application to the yarn of a dispersion of solid particles of polyfluorocarbon resins and/or graphite. Whilst in the wet state the yarn is subjected to a blowing process using a fluid under pressure, more particularly air, as a result of which the solid particles are distributed over the filaments and the filaments are generally interentangled and braided. According to a preferred embodiment of the process according to the invention the yarn is subjected to a blowing process after the dispersion of solid particles of a polyfluorocarbon resin-containing and/or graphite particles-containing dispersion has been applied to the yarn. Alternatively, according to the invention, the dispersion of particles of a polyfluorocarbon resin and/ or graphite may be directly blown onto the yarn while being fed to it under pressure. In the blowing process air is used at an absolute pressure of 3 to 10 bar.
  • the, preferably positively charged, PTFE are applied to the yarn from an aqueous dispersion whose composition may substantially be as follows:
  • the graphite particles are also applied from an aqueous dispersion, which may contain, for instance, about 18% by weight of graphite and 82% by weight of water and a nonionic wetting agent.
  • the PTFE and/or graphite particles are applied to the yarn from said dispersion with the aid of a kiss roll.
  • the PTFE and/or graphite particles may be applied to the yarn by passing it through a bath of said dispersion.
  • the yarn is fed to the blowing process at a rate in excess of that at which it is withdrawn therefrom of at least 1 %, preferably about 3% to 6%.
  • a satisfactory distribution of the solid particles over practically all the filaments of the yarn also may be obtained when the yarn is subjected to the blowing process without using an excess feed rate.
  • the yarn may be passed through the blowing zone practically without any tension.
  • the yarn according to the invention is particularly suitable to be used in the manufacture of rope having an outer diameter of, for example 3 to 100 mm such as marine rope, hoisting rope and the like, which rope is built up of two or more strands by laying or braiding.
  • the yarn to be incorporated in such rope contains less than 10% by weight, preferably about 5% by weight of solid particles.
  • the process is started from 5 packages 1 of non-twisted aramid filament yarn.
  • the aramid yarn 2 of each of the packages has 1000 filaments and a linear density of tex 168 and contains about 0,8% of a finish applied to the yarn during spinning.
  • the five aramid filament yarns 2 are assembled by the schematically indicated yarn guide 3 and drawn off from the starting packages 1 by the driven rolls 4,5.
  • the assembled yarn 6 is subsequently run over the kissing roll 7 rotating in an aqueous dispersion 8.
  • the assembled filament yarn thus wetted and provided with PTFE and/or graphite particles is fed to a blow box 9 containing an air nozzle 10 at a rate in excess of the rate at which it is withdrawn from the blow box.
  • the nozzle 10 may be of the type as indicated in US-A-3 302 386.
  • the blown and impregnated yarn is discharged from the blow box 9 over a pair of driven pulling-off rolls 11,12 which have such a lower circumferential speed than the feed rolls 4,5 as to ensure that the yarn is fed to the air nozzle 10 at a sufficiently high excess feed rate.
  • the dried yarn After leaving the heated pulling-off rolls 11,12 the dried yarn may still be lubricated, if desired, and subsequently wound into a package.
  • the assembled yarn 5x168 composed of 5 basic yarns 2 is treated with air at an absolute pressure of 5 bar, the yarn being fed at an excess rate of 3%.
  • the asembled yarn may be made up of 10 basic yarns.
  • Such assembled 10x 168 tex yarn is treated in the blow box 9 with air fed at an absolute pressure of 10 bar, the excess feed rate of the yarn being 6%.
  • the yarn When the yarn is treated without applying an excess feed rate, it may be fed to and discharged from the blowing zone at a speed of 60 min/ min.
  • Fig. 2 shows a somewhat modified embodiment of the apparatus for carrying out the process according to the invention.
  • the untreated aramid yarn 13 is fed by a pair of rolls 14 at a particular speed desired.
  • the yarn is passed through a bath 15 containing an aqueous dispersion of PTFE and/or graphite particles.
  • the yarn is passed over two or more guide rolls (not shown in the drawing).
  • the yarn passes upwards through a feed pipe 17 ending in a blow box 18.
  • the blow box 18 there is again a nozzle (not shown) of the type described in US-A-3 302 386.
  • the advantage of the feed pipe 17 is that excess dispersion not entrained by the yarn and blown off from the yarn flows back into the bath through said pipe 17.
  • the impregnated yarn 19 leaves the blow box 18 through the outlet opening 20.
  • the yarn is withdrawn from the blow box 18 by the driven roll 24 with separator roll 21.
  • the roll 24 may be heated for drying the yarn.
  • the yarn thus impregnated and dried may be formed into a package via a traverse mechanism 22.
  • the circumferential speed of the roll 24 is lower than that of the rolls 14, so that the yarn is passed through the blow box at the particular excess feed rate desired.
  • the dispersion used is of the type marketed by ICI under the name Fluon8; the PTFE particles in it carry a negative electric charge. In the process of the invention, however, also other dispersions may be applied. Use may advantageously be made of dispersions in which the particles of the fluorocarbon compound, more particularly polytetrafluoroethylene (PTFE), carry a positive electric charge. These last-mentioned dispersions are elaborately described in DE-A-26 44 152. Use of a dispersion containing positively charged PTFE particles is expected to lead to an even better adhesion of these particles to the filaments of the yarn.
  • PTFE polytetrafluoroethylene
  • the excess feed rate used in the wet-blowing process of the present invention is of great influence on the structure of the yarn.
  • the interentanglement or interlacement of the filaments is very much dependent on the excess feed rate.
  • the excess feed rate of as low as 1 % the non-twisted yarn loses its smooth appearance and becomes somewhat bulky or textured as a result of the interentanglement and/or interlacement of the filaments and the formation of loops in one or more filaments.
  • the interentanglement and interlacement of the filaments of a yarn and the manufacture of a yarn having a multitude of loops are known in themselves from the textile art and are described in US-A-3 302 386 and US-A-2 783 609.
  • the interentanglement and interlacement of the filaments of a yarn with the aid of a blowing process and using an excess feed rate of the yarn imparts a voluminous character to the yarn.
  • a high excess feed rate renders the yarn very bulky.
  • the yarn wetted with a PTFE and/or graphite dispersion and subjected to a blowing treatment has a voluminous character, which is influenced by the degree of impregnation with solid particles. Impregnation of the yarn with a higher percentage of PTFE particles is attended with a lower voluminous character as a result of the adhesion of the PTFE particles to the yarn; in other words, the degree of impregnation to be chosen depends on the voluminous character desired.
  • the preferred excess feed rate is in the range of 3% to 6%, which results in a yarn having a more or less loopy character.
  • the presence of internal and/or external loops formed in one or more filaments of the yarn and the resulting bulky appearance is characteristic of a particular embodiment of the yarn according to the invention.
  • Particularly surprising is that already a fairly low excess feed rate of 3% results in a sufficiently voluminous yarn which is excellently suitable to be further processed into a packing material.
  • a particularly uniform distribution of the PTFE and/or graphite particles over practically all the filaments of the yarn is obtained.
  • the blowing process constitutes an essential element of the invention with a view to obtaining a very good distribution of the solid particles over the filaments of the yarn.
  • a smooth, non-air blown aramid filament yarn can be treated with a PTFE particles-containing dispersion, use being made of an applicator roll or impregnation.
  • PTFE particles-containing dispersion use being made of an applicator roll or impregnation.
  • the PTFE particles will stick to the outer circumference of the yarn in the form of variously sized lumps, as can be seen on a highly enlarged photograph of a cross-section of the yarn.
  • Such a photograph also shows that hardly any PTFE particles at all are stuck to the filaments that are within the circumference of the yarn. Therefore, a non-air treated aramid filament yarn cannot be evenly impregnated with PTFE particles and is less suitable to be worked up into a packing material.
  • oil absorption capacity of the yarn mentioned hereinbefore with regard to lubricants, such a paraffin oil, silicone oil, molybdenum disulphide or the like is referred to as oil absorption capacity and is determined as follows: An one metre long piece of aramid filament yarn impregnated beforehand with PTFE particles is impregnated with paraffin oil having a viscosity of 72 centipoises (72 mPas; measured by the Brookfield method) by dipping the yarn in a tray with paraffin oil at room temperature, after which the tray is kept in a vacuum chamber for 15 minutes.
  • the yarn thus impregnated is suspended by its one end in such a way that the paraffin oil which cannot be retained by the yarn can drip off at its other, free end.
  • the amount of paraffin oil absorbed which is a measure of said oil absorption capacity, is determined by weighing.
  • the second weighing of the oil-impregnated yarn is carried out as soon as there can no longer be observed any dripping at the free end of the yarn after at least 24 hours.
  • the first weighing is carried out on said 1 m long piece of yarn while still dry and impregnated with PTFE and/or graphite particles.
  • results A and B of the first and the second weighings are, for instance, 1000 and 1350 weight units, respectively.
  • wholly aromatic polyamides refers to polyamides which are entirely or substantially built up of recurrent units of the general formula wherein A ⁇ , A 2 and A3 represent different or the same divalent, one or more aromatic rings-containing rigid radicals which may also contain a heterocyclic ring, of which radicals the chain extending bonds are in the position para to each other or are parallel and oppositely directed.
  • aromatic rings-containing rigid radicals which may also contain a heterocyclic ring, of which radicals the chain extending bonds are in the position para to each other or are parallel and oppositely directed.
  • these radicals include 1,4-phenylene, 4,4'-biphenyiene, 1,5-naphthylene and 2,6-naphthylene.
  • They may contain substituents or not, e.g. halogen atoms or alkyl groups.
  • composition of the aramids it should be added that they may optionally contain up to 35 mole % of other groups, such as m-phenylene groups, non-rigid groups, such as alkyl groups, or ether groups, urea groups or ester groups.
  • aramids may be mentioned poly-p-benzamide, poly-p-phenylene terephthalamide and their copolymers. According to the invention it is preferred that use should be made of yarns of poly-p-phenylene terephthalamide (PPDT).
  • fluorine-containing compounds that may advantageously be used for the yarn according to the invention may be mentioned: polytetrafluoroethylene (PTFE), polyhexafluoropropylene, polychlorotrifluoroethene, polyvinylidene fluoride, tetrafluoroethene hexafluoropropylene copolymer, vinylidene fluoride-hexafluoropropylene copolymer, fluorosilicone elastomers, polyfluoroaniline, tetrafluoroethene trifluoronitrosomethane copolymer, graphite fluoride, etc.
  • PTFE polytetrafluoroethylene
  • polyhexafluoropropylene polychlorotrifluoroethene
  • polyvinylidene fluoride tetrafluoroethene hexafluoropropylene copolymer

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Ropes Or Cables (AREA)
  • Artificial Filaments (AREA)

Claims (24)

1. Garn aus aromatischen Polyamid-Endlosfilamenten, die mit einer Dispersion imprägniert sind, welche feste schmierende Partikel aus Polyfluorkohlenstoffharzen, insbesondere PTFE, und/oder Graphit enthält, wobei das Garn ein Wirrgarn ist, das durch Fluidstrahlbehandlung verschlungen ist.
2. Garn nach Anspruch 1, dadurch gekennzeichnet, dass das Garn so strukturiert ist, dass die Absorptionskapazität des die festen Partikel enthaltenden Garns für ein Schmiermittel im Bereich von 20 bis 50 Gew.%, vorzugsweise in der Grössenordnung von 35 Gew.%, berechnet auf das Gewicht des mit den festen Partikeln versehenen trockenen Garns, liegt.
3. Garn nach Anspruch 1, dadurch gekennzeichnet, dass es viele, in einem Filament oder in mehreren Filamenten gebildete Schlingen aufweist.
4. Garn nach einem oder mehreren der vorangehenden Anspruche, dadurch gekennzeichnet, dass das Garn 1000 bis 20'000 filamente, vorzugsweise etwa 5000 Filamente, enthält und der Titer des Garns im Bereich von tex 150 bis 3000, vorzugsweise in der Grössenordnung von tex 850, liegt.
5. Garn nach Anspruch 1, dadurch gekennzeichnet, dass das Garn weniger als 60 Gew.% feste Partikel, berechnet auf das Gewicht des trockenen Garns ohne die festen Partikel, enthält.
6. Garn nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die festen Partikel derart gleichmässig auf das Garn appliziert sind, dass an einem statistischen Garnquerschnitt mindestens 50 %, vorzugsweise 70 bis 100 %, der Anzahl der Filamente ein oder mehrere Partikel tragen.
7. Garn nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass 80 % der festen Partikel eine Grösse von unter 1 um haben.
8. Garn nach Anspruch 5, dadurch gekennzeichnet, dass das Garn 10 bis 45 Gew.%, vorzugsweise etwa 30 Gew.%, feste Partikel, berechnet auf das Trockengewicht des Garns ohne die festen Partikel, enthält.
9. Garn nach Anspruch 5, dadurch gekennzeichnet, dass das Garn weniger als 10 Gew.%, vorzugsweise etwa 5 Gew.%, feste Partikel, berechnet auf das Trockengewicht des Garns ohne die festen Partikel, enthält.
10. Dichtungsmaterial, z. B. für Stopfbuchsenpackungen, dadurch gekennzeichnet, dass es Garn gemäss einem oder mehreren der Ansprüche 1 bis 8 enthält.
11. Dichtungsmaterial nach Anspruch 10, dadurch gekennzeichnet, dass der Gewichtsanteil der festen Partikel kleiner als 60 % ist, vorzugsweise 10 bis 45 % beträgt, berechnet auf das Gewicht des trockenen Garns ohne die festen Partikel.
12. Dichtungsmater-ial nach den Ansprüchen 10 und 11, dadurch gekennzeichnet, dass es ein Schmiermittel, wie Paraffinöl, Siliconöl, Molybdänsulfid oder dergleichen, in einem Anteil von 20 bis 50 Gew.%, vorzugsweise etwa 35 Gew.%, enthält, berechnet auf das Gewicht des mit den festen partikeln versehenen trockenen Garns aus aromatischen Polyamiden.
13. Seil, z. B. Schiffsseil, Zugseil oder dergleichen, das durch Verseilen, Zusammendrehen oder Verflechten von zwei oder mehr Strängen aufgebaut ist, dadurch gekennzeichnet, dass das Seil aus Garn gemäss Anspruch 9 gebildet ist.
14. Verfahren zur Herstellung des Garns nach einem oder mehreren der Ansprüche 1 bis 9 durch Auftragen einer Dispersion von festen schmierenden Partikeln aus Polyfluorkohlenstoffharzen, insbesondere PTFE, und/oder Graphit, auf das Garn, wobei das in nassem Zustand befindliche Garn unter Verwendung eines Fluids, vorzugsweise Luft, unter Druck einer Verschlingungsbehandlung ausgesetzt wird, wodurch die festen Partikel auf den Filamenten verteilt werden.
15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass das Fluid praktisch quer zur Bewegungsrichtung des Garns auf dieses geblasen wird.
16. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass das Garn nach der Applikation der Dispersion, welche die festen Partikel enthält, einem Blasprozess unterzogen wird.
17. Verfahren nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass die Dispersion, welche die festen Partikel enthält, während des Blasprozesses auf das Garn aufgetragen wird.
18. Verfahren nach Anspruch 17, dadurch gekennzeichnet, dass die Dispersion, welche die festen Partikel enthält, direkt durch Aufblasen unter Druck auf die Filamente des Garns aufgebracht wird.
19. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass negativ geladene, feste Polyfluorkohlenstoffharz-Partikel aus wässriger Dispersion auf das Garn aufgetragen werden.
20. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass positiv geladene Polyfluorkohlenstoffharz-Partikel aus wässriger Dispersion auf das Garn aufgetragen werden.
21. Verfahren nach Anspruch 19 oder 20, dadurch gekennzeichnet, dass die wässrige Dispersion im wesentlichen folgende Zusammensetzung hat:
45 bis 75 Gew.%, vorzugsweise etwa 58 Gew.%, PTFE-Partikel;
50 bis 20 Gew.%, vorzugsweise etwa 40 Gew.%, Wasser;
höchstens 5 Gew.%, vorzugsweise etwa 3,5 Gew.%, Netzmittel auf Basis von Alkylphenoxyethanol.
22. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass die Einspeisungsrate des Garns in den Blasprozess grösser ist als die Abführungsrate des Garns aus dem Blasprozess.
23. Verfahren nach Anspruch 22, dadurch gekennzeichnet, dass die Einspeisungsrate mindestens um 1 %, vorzugsweise um etwa 3 % bis 6 %, grösser als die Abführungsrate ist.
24. Verfahren nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass die Einspeisungsrate des Garns in den Blasprozess nicht grösser ist, als die Abführungsrate.
EP84200913A 1983-07-04 1984-06-25 Mit schmierenden Partikeln imprägniertes aromatisches Polyamidgarn, Verfahren zur Herstellung dieses Garnes und dasselbe enthaltendes Dichtungsmaterial oder Seil Expired - Lifetime EP0136727B2 (de)

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AT84200913T ATE28909T1 (de) 1983-07-04 1984-06-25 Mit schmierenden partikeln impraegniertes aromatisches polyamidgarn, verfahren zur herstellung dieses garnes und dasselbe enthaltendes dichtungsmaterial oder seil.

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Application Number Priority Date Filing Date Title
NL8302368 1983-07-04
NL8302368 1983-07-04

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EP0136727A1 EP0136727A1 (de) 1985-04-10
EP0136727B1 true EP0136727B1 (de) 1987-08-12
EP0136727B2 EP0136727B2 (de) 1992-10-07

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EP (1) EP0136727B2 (de)
JP (2) JPS6075675A (de)
AT (1) ATE28909T1 (de)
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DE (1) DE3465353D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088139A (zh) * 2014-06-18 2014-10-08 桐乡市濮院毛针织技术服务中心 深色纱线蜡

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0327736A1 (de) * 1988-02-12 1989-08-16 Akzo N.V. Verfahren zur Herstellung von Garn für Dichtungen
US4994303A (en) * 1988-03-21 1991-02-19 Garlock, Inc. Fiber impregnation process
DE3816318C1 (de) * 1988-05-13 1989-11-30 Amann & Soehne Gmbh & Co, 7124 Boennigheim, De
GB8819873D0 (en) * 1988-08-22 1988-09-21 Westone Prod Ltd Dental floss & tape
JPH0246895U (de) * 1988-09-27 1990-03-30
JPH02210071A (ja) * 1989-02-10 1990-08-21 Teijin Ltd 繊維構造物
DE3929376C1 (de) * 1989-09-05 1991-04-18 E.I. Du Pont De Nemours And Co., Wilmington, Del., Us
US5270113A (en) * 1989-09-05 1993-12-14 E. I. Du Pont De Nemours And Company Highly processable aromatic polyamide fibers, their production and use
GB9003292D0 (en) * 1990-02-14 1990-04-11 Lisney Kevin P Dispensing mechanism
JP2928571B2 (ja) * 1990-02-22 1999-08-03 帝人株式会社 繊維ロープ状物
JP2557995B2 (ja) * 1990-02-23 1996-11-27 帝人株式会社 耐摩耗性向上処理剤
DE69231379T2 (de) * 1991-03-01 2001-03-01 E.I. Du Pont De Nemours And Co., Wilmington Oberflächenbehandelte aramidfasern und verfahren zu deren herstellung
US5298028A (en) * 1992-06-17 1994-03-29 E. I. Du Pont De Nemours And Company Method of making a yarn of particulate-impregnated aramid fibers
WO2001070855A1 (de) * 2000-03-20 2001-09-27 P-D Tec Fil Gmbh Technische Filamente Verfahren zur erzeugung von fadenprepregs
DE10211667A1 (de) * 2002-03-15 2003-10-02 P D Tec Fil Gmbh Tech Filament Textiles Glas-/PTFE-Gewebe
DE20210426U1 (de) * 2002-07-04 2003-11-13 Coats Deutschland GmbH, 79341 Kenzingen Garn
ATE398693T1 (de) 2004-03-18 2008-07-15 Diolen Ind Fibres B V Verfahren zum beschichten eines garnes
JP4896433B2 (ja) * 2005-06-02 2012-03-14 株式会社クラレ 極細溶融異方性芳香族ポリエステル繊維
JP5242913B2 (ja) * 2006-12-26 2013-07-24 帝人株式会社 高強力ロープ
US20130289531A1 (en) * 2012-03-31 2013-10-31 Cordis Corporation Lubricious medical tubing
US10450696B2 (en) 2013-11-07 2019-10-22 Teijin Aramid B.V. Floating linear tension member comprising multiple fibers
US11618996B2 (en) * 2016-10-27 2023-04-04 Dupont Safety & Construction, Inc. Fabric having a cut-resistant coating comprising para-aramid particles
CN107345329A (zh) * 2017-06-27 2017-11-14 太仓市玛雅针织有限公司 一种柔韧性好的混合纤维
CN108866726B (zh) * 2018-07-17 2020-01-21 江南大学 一种受热膨胀纱线的制备方法
CN109706764B (zh) * 2019-01-29 2021-05-18 南通理工学院 一种智能制造用钢绳附油装置
WO2022009918A1 (ja) * 2020-07-09 2022-01-13 Ａｇｃ株式会社 サイジング剤、サイジング処理された繊維、プリプレグおよび分散液

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2807864A (en) * 1954-06-24 1957-10-01 Eastman Kodak Co Composition and process for treating yarn
US3827114A (en) * 1971-09-07 1974-08-06 Fiber Industries Inc Process for steam jet texturing a coated yarn
JPS6047932B2 (ja) * 1977-05-31 1985-10-24 帝人株式会社 解繊性の良好な繊維の製造法
US4232087A (en) * 1978-08-03 1980-11-04 Albany International Corp. Method of coating organic fibers with polytetrafluoroethylene
JPS56107073A (en) * 1980-01-22 1981-08-25 Teijin Ltd Improved all aromatic polyamide fiber and cloth
JPS59163425A (ja) * 1983-03-07 1984-09-14 Teijin Ltd 合成繊維の表面改質法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088139A (zh) * 2014-06-18 2014-10-08 桐乡市濮院毛针织技术服务中心 深色纱线蜡

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JPH0734382A (ja) 1995-02-03
EP0136727A1 (de) 1985-04-10
CA1252775A (en) 1989-04-18
EP0136727B2 (de) 1992-10-07
ATE28909T1 (de) 1987-08-15
JPS6075675A (ja) 1985-04-30
DE3465353D1 (en) 1987-09-17
JPH0826515B2 (ja) 1996-03-13

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