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WO2025036794A1 - Procédé d'entrelacement de fils - Google Patents

Procédé d'entrelacement de fils Download PDF

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Publication number
WO2025036794A1
WO2025036794A1 PCT/EP2024/072357 EP2024072357W WO2025036794A1 WO 2025036794 A1 WO2025036794 A1 WO 2025036794A1 EP 2024072357 W EP2024072357 W EP 2024072357W WO 2025036794 A1 WO2025036794 A1 WO 2025036794A1
Authority
WO
WIPO (PCT)
Prior art keywords
yarn
yarns
multifilament
guiding
intermingling
Prior art date
Application number
PCT/EP2024/072357
Other languages
German (de)
English (en)
Inventor
Andreas Flachenecker
Jesse Sullivan
Thomas Buss
Thomas Schüßler
Original Assignee
Indorama Ventures Mobility Obernburg 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
Application filed by Indorama Ventures Mobility Obernburg Gmbh filed Critical Indorama Ventures Mobility Obernburg Gmbh
Publication of WO2025036794A1 publication Critical patent/WO2025036794A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • 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
    • D02G1/161—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam yarn crimping air jets
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams

Definitions

  • the invention relates to a tangled unsized synthetic filament yarn, in particular a synthetic filament yarn for the production of airbag fabrics and other technical fabrics, with a yarn linear density of 200 - 1 000 dtex.
  • Fabrics for the manufacture of airbags must meet a number of very different requirements. In addition to the particularly important, specifically adjusted air permeability, these fabrics must have good resistance to aging, high strength, good foldability and a high degree of flexibility in the event of an impact. In line with the special requirements for the properties of the fabrics, very specific requirements are also placed on the yarns used for this purpose, which relate on the one hand to their effects on the fabric properties, but on the other hand to their processing behavior during fabric production.
  • the first airbags were therefore made from coated fabrics. These have not proven to be particularly advantageous, not only because of the manufacturing costs, but also because of a number of disadvantages in use.
  • the yarns mentioned were almost always used in fabric production in a spun state, in rare cases twisted or twisted.
  • the weft consisted of mostly made of unsized and untwisted yarns, but more rarely twisted yarns were also used in the weft.
  • EP 0 738 793 A1 discloses a yarn whose properties could be significantly improved by intermingling. However, it is not able to fulfil the task underlying the application, since it does not allow for a complete dispensing with sizing and twisting. EP 0 738 793 is fully incorporated by reference into the disclosure of the present application.
  • the task was therefore to provide suitable yarns for the production of uncoated airbag fabrics which can be processed into fabrics at low cost without negatively influencing the required fabric properties and which, in addition, result in an improvement in the fabrics produced from them compared to the airbag fabrics predominantly used to date, particularly with regard to foldability and flexibility.
  • the object is achieved by a method for intermingling multifilament yarns, comprising the steps of providing a multifilament yarn, guiding the multifilament yarn through a first thread guide element, guiding the multifilament yarn through an intermingling nozzle, intermingling the yarn by means of compressed air in the intermingling nozzle, guiding the intermingled multifilament yarn through a second thread guide element, characterized in that the first and the second thread guide element are a maximum of six centimeters apart from one another, that the compressed air used for intermingling has a pressure of at least three bar.
  • Polyamide yarns can be used, such as polyamide 6.6, polyamide 4.6 and polyamide 6.
  • other types of fibers such as polyester fibers such as polyethylene terephthalate can also be used.
  • the present application is not intended to be limited to a specific type of fiber, but to include all synthetic filament yarns.
  • the processed multifilament yarns have yarn deniers of at least 50 dtex, in one embodiment at least 78 dtex, 100 dtex or 200 dtex.
  • the processed multifilament yarns have yarn deniers of maximum 200 dtex, in one embodiment maximum 500 dtex, 700 dtex or 1000 dtex.
  • the filament titers of the multifilament yarns used are at least 1 dtex, in one embodiment at least 2 dtex or at least 5 dtex.
  • the filament titres of the multifilament yarns used are not more than 5 dtex, in one embodiment not more than 8 dtex or not more than 12 dtex.
  • Examples of usable yarn types are 235 f 72 with a filament titer of 3.26 dtex (i.e. 72 individual filaments of 3.26 dtex with a total titer of 235 dtex), 350 f 144 with a filament titer of 2.43 dtex, 470 f 144 with a filament titer of 3.26 dtex, 700 f 140 with a filament titer of 5.0 dtex, 700 f 144 with a filament titer of 4.86 dtex, 700 f 210 with a filament titer of 3.33 dtex and 940 f 280 with a filament titer of 3.36 dtex.
  • the polyamide yarns suitable for the production of airbag fabrics have a strength of at least 60 cN/tex and an elongation of 15-30%.
  • the strengths are also over 60 cN/tex and the elongations are 10-25%.
  • the yarns used are manufactured using the methods commonly used in the chemical fiber industry. Melt spinning processes are normally used to spin filament yarns from polyamides or polyesters. The desired titer is set using the known methods, particularly by controlling the throughput at the spinneret.
  • Tangling is also a process frequently used in the chemical fiber industry. Terms such as swirling or intermingling are also common for this. In the following, the terms “intermingling”, “tangling” and “swirling” are used synonymously.
  • the opening length and the stability of the intermingling points are controlled by a precise coordination of the geometry of the Tangei nozzle, the tension and the speed when entering the Tangei nozzle and the amount of air introduced as well as the air pressure. These process conditions for tangling depend on the yarn titer and the preparation applied to the yarn and must therefore be coordinated with these parameters. In addition, the guidance of the yarn is of great importance and should be as tight as possible, i.e. that the The small distance between the thread guide elements results in a particularly uniform distribution of the swirling points, with the swirling nozzle or nozzles being arranged between the thread guide elements.
  • the two thread guide elements have a distance of no more than six centimetres, in one embodiment no more than five centimetres, four centimetres, three centimetres or two centimetres.
  • the thread guides can be eyelets, hooks, rings, rods or so-called pigtails.
  • the yarn not only passes through the thread guide, but is in contact with the thread guide in such a way that the direction of the yarn changes or that the yarn is mechanically decoupled from the rest of the yarn between the thread guides.
  • the yarns according to the invention it is important for the yarns according to the invention to maintain a certain average opening length of 3 - 8 cm, in one embodiment 4 - 6 cm. Greater average opening lengths do not result in satisfactory processing properties on the weaving machine, as they do not allow sufficient yarn closure and thus no satisfactory integration of the fragile fine individual filaments into the yarn structure is possible. For example, a broken filament in a warp yarn will usually only be pushed up to the next interlacing point and run with it through the strand on the loom. If the next interlacing point is far away, a relatively large length of broken filament is created, which is then pushed up and finally leads to a thick spot that the strand can no longer pass through, which can cause yarn breakage.
  • the average opening length is the average distance between the interlacing points in a yarn.
  • the interlacing point which is sometimes also referred to as a tangle knot, is a point of interlacing in the yarn at the beginning of which a measuring signal is triggered when the opening length is measured.
  • These interlacing points which are preformed by filament crossings in the yarn, lead to a measuring signal when a certain resistance is offered to the measuring needle by a corresponding degree of interlacing.
  • the range of the opening length is also of great importance. This refers to the variability of the measured opening lengths. The lower the variability, the more evenly the interlacing points are distributed across the yarn. This is an advantage because if the interlacing points are distributed very unevenly on the sections where the interlacing points are far apart than average, the same disadvantages can occur as those generally outlined above for opening lengths that are too large.
  • the processing speed of the yarn is also of decisive importance for the range of the opening length. It should be noted that a low processing speed generally means a smaller range of variation, but that for reasons of cost-effectiveness of the process the highest possible processing speed is desired.
  • the processing speed in the present process is 2000 meters per minute (mpm) or more, 2500 mpm or more, 3000 mpm or more or 3500 mpm or more.
  • the nozzle has at least one or at least two outlet openings. In one embodiment, the yarn is passed between the outlet openings of the nozzle.
  • the swirl nozzle has a diameter of a maximum of four millimeters, a maximum of three millimeters, a maximum of two millimeters or a maximum of one millimeter. In one embodiment, it can be a double nozzle, which is also known to those skilled in the art as a “tandem nozzle.”
  • the yarn to be tested is pre-tensioned using two hysteresis brakes so that the thread tension at the entrance to the actual measuring section is 1.8 cN/tex.
  • the yarn is grasped and spread by two thread guides, after which a measuring needle pierces the thread.
  • a measuring signal is triggered, the length of yarn that has been passed through in the meantime is determined by an electronic counting relay and recorded in a memory unit.
  • the yarn is then automatically pulled further and the measuring cycle begins again.
  • the application further relates to a yarn produced by a method according to one or more of the preceding claims, wherein the median value of the opening length of the yarn is at most 55 millimeters and the mean value of the opening lengths is not more than 10%, preferably not more than 7% larger, even more preferably not more than 5% larger than the median value.
  • the mean value is understood to be the arithmetic mean of a set of numbers.
  • the median value is understood to be the measured value that forms the value that is exactly in the middle of a set of numbers sorted in ascending order if the number of numbers is odd. If the number of numbers in a set is even, the set is sorted in ascending order to determine the median value and the median value is then determined as the arithmetic mean of the two middle values.
  • Fig. 1 and 2 show box plots showing the measured opening lengths at 80 and 120 cN measuring needle thread tension. The shaded boxes show the area in which 50% of the measured opening lengths are located.
  • Fig. 1 shows the values at a measuring needle thread tension of 80 cN and Fig. 2 shows the values at a measuring needle thread tension of 120 cN.
  • the measurements were carried out with a Rothschild type entanglement nozzle. A Rothschild Automatic Yam-Entanglement Tester, Type R-2072, was used to measure the opening lengths.
  • a Tangle Jet P20 swirling nozzle was used, which worked with a continuous air flow.
  • the nozzle has two holes with a diameter of 2 millimeters, between which the thread is passed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

L'invention concerne un procédé d'entrelacement de fils multifilamentaires, consistant : à obtenir un fil multifilamentaire, à guider le fil multifilamentaire à travers un premier organe de guidage de fil, à guider le fil multifilamentaire à travers une buse d'entrelaçage, à entrelacer le fil au moyen d'air comprimé dans la buse d'entrelacement, à guider le fil multifilamentaire entrelacé à travers un deuxième organe de guidage de fil, se caractérisant en ce que les premier et deuxième organes de guidage de fil se situent à une distance maximale de sept centimètres l'un de l'autre, et que l'air comprimé utilisé pour l'entrelacement présente une pression d'au moins 3 bars.
PCT/EP2024/072357 2023-08-11 2024-08-07 Procédé d'entrelacement de fils WO2025036794A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23190993.8 2023-08-11
EP23190993 2023-08-11

Publications (1)

Publication Number Publication Date
WO2025036794A1 true WO2025036794A1 (fr) 2025-02-20

Family

ID=87571477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/072357 WO2025036794A1 (fr) 2023-08-11 2024-08-07 Procédé d'entrelacement de fils

Country Status (1)

Country Link
WO (1) WO2025036794A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738793A1 (fr) 1995-04-22 1996-10-23 Akzo Nobel N.V. Fil constitué de filaments synthétiques entrelacés pour la production de tissus techniques
EP1621649A1 (fr) * 2004-07-28 2006-02-01 FARE' S.p.A. Dispositif et méthode de traitement de fils synthétiques
CN107974743A (zh) * 2017-11-22 2018-05-01 广东天海花边有限公司 一种可生产非弹性包覆纱的空气包覆纱机
CN109402802A (zh) * 2018-12-21 2019-03-01 苏州大学 基于双涡流技术的假捻变形纱生产设备及方法
WO2023124514A1 (fr) * 2021-12-30 2023-07-06 江苏恒力化纤股份有限公司 Procédé pour améliorer la solidité de l'entrelacement d'un multifilament à entrelacement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738793A1 (fr) 1995-04-22 1996-10-23 Akzo Nobel N.V. Fil constitué de filaments synthétiques entrelacés pour la production de tissus techniques
EP1621649A1 (fr) * 2004-07-28 2006-02-01 FARE' S.p.A. Dispositif et méthode de traitement de fils synthétiques
US20060021206A1 (en) * 2004-07-28 2006-02-02 Fare' S.P.A. Apparatus and method for treating synthetic yarns
CN107974743A (zh) * 2017-11-22 2018-05-01 广东天海花边有限公司 一种可生产非弹性包覆纱的空气包覆纱机
CN109402802A (zh) * 2018-12-21 2019-03-01 苏州大学 基于双涡流技术的假捻变形纱生产设备及方法
WO2023124514A1 (fr) * 2021-12-30 2023-07-06 江苏恒力化纤股份有限公司 Procédé pour améliorer la solidité de l'entrelacement d'un multifilament à entrelacement

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