EP0980447A1 - Fil de trame et procede de fabrication d'un fil de trame a partir d'un polyamide 6.6 thermoprotege pour tissu pour cable pour pneu - Google Patents

Fil de trame et procede de fabrication d'un fil de trame a partir d'un polyamide 6.6 thermoprotege pour tissu pour cable pour pneu

Info

Publication number
EP0980447A1
EP0980447A1 EP98914768A EP98914768A EP0980447A1 EP 0980447 A1 EP0980447 A1 EP 0980447A1 EP 98914768 A EP98914768 A EP 98914768A EP 98914768 A EP98914768 A EP 98914768A EP 0980447 A1 EP0980447 A1 EP 0980447A1
Authority
EP
European Patent Office
Prior art keywords
tex
polyamide
yarn
dtex
cord fabric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98914768A
Other languages
German (de)
English (en)
Other versions
EP0980447B1 (fr
Inventor
Bruno Lang
Paul Schaffner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExNex AG
Original Assignee
Rhodia Filtec AG
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 Rhodia Filtec AG filed Critical Rhodia Filtec AG
Publication of EP0980447A1 publication Critical patent/EP0980447A1/fr
Application granted granted Critical
Publication of EP0980447B1 publication Critical patent/EP0980447B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • D02G1/168—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam including drawing or stretching on the same machine
    • 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
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/48—Tyre cords
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]
    • Y10T428/2924—Composite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y10T428/2969—Polyamide, polyimide or polyester

Definitions

  • the present invention relates to a weft yarn made of a heat-protected polyamide 6.6 multifilament for tire cord fabric with a total titer of 100-400 dtex, and a method for producing a weft yarn.
  • the object of the invention is to provide a PA 66 weft yarn for tire cord fabric, which has a high thermal stability, a defined reversibility limit, sufficient strength and sliding resistance and a high maximum tensile strength. Another object is to provide a method for producing weft yarns for tire cords which, after impregnation, exhibit a maximum tensile strength stretch which ensures that the cord threads are spread without tire weft breaks during tire manufacture.
  • the object is achieved in that the raw yarn simultaneously has:
  • Such a yarn has the advantage that the pronounced filing behavior in the fabric when building a tire enables a homogeneous warp thread distribution.
  • this yarn has succeeded in providing an em-component weft yarn that does not cause annoying and dangerous dust generation when woven, as is common when using natural fibers. It should also be able to withstand a high thermal load during impregnation, hardly have a width rise and when building a tire, a very homogeneous cord warp spread enable and thus be used universally for tire cord fabrics based on nylon, polyester and aramid.
  • a load of 6 cN / tex to 12 cN / tex, preferably 6-10 cN / tex has proven to be expedient.
  • Elongation forces higher than 12 cN / tex have the disadvantage of an inhomogeneous warp thread distribution when expanding the radial tire on the tire building machine.
  • Elongation forces below 6 cN / tex lead to irreversible weft thread stretching and thus insufficient stability with regard to warp thread parallelism, both in the case of large-area and point loads, for example when storing the fabric bales. This results in poor to unusable tire carcasses.
  • Maximum tensile strength strains of more than 300% lead to excessive stretching in the manufacture of tire cord fabrics under normal loads; a maximum tensile force elongation of less than 150%, on the other hand, leads to an insufficient stretch reserve, resulting in insufficient weft deformation or even weft yarn breakage in the fabric. In both cases, the resulting tire carcasses are inhomogeneous and thus the tires made from them.
  • the weft yarn has a strength of at least 14 cN / tex, so that the load peaks containing different process stages cannot lead to weft breaks.
  • a reversibility limit of 5 to 10 cN / tex is particularly advantageous.
  • a reversibility limit of less than 5 cN / tex means that the dimensional stability when inserting weft and the fabric width stability cannot be guaranteed until it is processed in the tire. If the reversibility limit is greater than 10 cN / tex, the force resulting from vulcanization is not sufficient to spread the individual cords evenly.
  • a thermal shrinkage force of 0.15 to 0.8 cN / tex has the advantage that the fabric width practically does not sag when the fabric is impregnated, thus ensuring a homogeneous distribution of cord warp threads, especially for fabrics with weft yarn edges; at a thermal shrinkage force greater than 0.8 cN / tex, the thread length is shortened, despite the forces acting on the weft threads during the impregnation by means of spreading rollers, which does not ensure the required homogeneity. This leads to undesired warp thread densification, especially at the fabric edges. With thermal shrinkage forces of less than 0.15 cN / tex, thread elongation can already occur during thermal stress (impregnation) of the carcass fabric, which means that the parallelism of the warp threads is no longer guaranteed.
  • the weft yarn has all the following characteristics after 5 mm of hot air treatment without tension, at 235 ° C:
  • the weft yarn also has a SLASE 80% after impregnation, of less than 14 cN / tex, preferably less than 12 cN / tex.
  • a SLASE 80% of more than 12 cN / tex increases the risk of uneven distribution of the warp threads when expanding the carcass to the final tire circumference when building a tire.
  • the impregnated yarn is RFL dipped in a known manner and then thermoflixed at temperatures up to 245 ° C, preferably at 210-235 ° C and for 45-200 s. Even after the hot air treatment, the reversibility limit is less than 10 cN / tex, preferably less than 8 cN / tex. This has the advantage that spreading forces occurring during vulcanization are sufficient to deform the weft threads so that a uniform distribution of the carcass threads is ensured.
  • a polyamide 6.6 LOY is used as the starting material for the raw yarn of the process according to the invention.
  • a copolyamide with at least 85% by weight can also be used.
  • suitable copolyamides are PA 6, PA 6.10 and aramid.
  • the PA-6.6-LOY has usually been drawn at spinning take-off speeds of less than 1800 m / min.
  • the starting yarn is heat protected with a copper additive with at least 30 ppm Cu, preferably with 60-80 ppm Cu.
  • a method has proven to be particularly suitable in the one-stage production, starting from a LOY, wherein heat-protected with at least 30 ppm Cu
  • Polyamide 6.6-LOY filaments are stretched between 10 and 200%, preferably between 40 and 150%, in particular between 40 and 125, then are swirled to at least 10 knots / m, preferably at least 15 knots / m, using a compressed gas.
  • the method has the advantage that a compact fibril composite with a relatively rough and sliding-resistant surface results.
  • the LOY yarn can be drawn cold or warm, with or without a drawing pin.
  • the polyamide LOY filaments are drawn between 10 and 200% in a first process step and then, in a second process step, at the same time or subsequently swirled to at least 10 knots / m by means of a compressed gas, at a temperature between 150 and 235 ° C , preferably 200 and 225 ° C between 0-30% relaxed.
  • This has the advantage that lower shrinkage values and lower reference forces (L ⁇ SE) result.
  • the weft yarn is additionally fixed or stretched at a temperature between 150 and 235 ° C., in particular between 180 and 225 ° C., by 0 to 10%.
  • the weft yarn is used as raw yarn and is particularly suitable for tire cord fabrics.
  • a polyamide 6.6 with a Cu content of 60 ppm was spun in a known manner into a LOY, dtex 519, 34 fibrils with the properties listed in the table below. This starting material was then cold-drawn at a take-off speed of 450 m / min (take-off godet in the drawing zone) by 125%, using a drawing pen, and wound up with a titer of 224 dtex.
  • the detailed yarn properties are shown in Table 1 mentioned.
  • a polyamide 6.6 with a Cu content of 30 ppm was spun in a known manner to a LOY, dtex 550, 17 fibrils, with the properties listed in the table below. This starting material was then at a take-off speed of 60 m / min (take-off godet in the stretching zone) at 160 ° C. without Straightening pen, stretched by 100% and with a titer of
  • a polyamide 6.6 with a Cu content of 60 ppm was spun in a known manner into a LOY, dtex 252, 34 fibrils, with the properties listed in the following table. This starting material was then cold-drawn at a take-off speed of 120 m / min (take-off godet in the drawing zone) by 40%, using a drawing pen, and wound up with a titer of 190 dtex.
  • the detailed yarn properties are shown in Table 1 mentioned.
  • a polyamide 6.6 with a Cu content of 60 ppm became a LOY, dtex 252, 34 in a known manner
  • a polyamide 6.6 with a Cu content of 60 ppm was spun in a known manner into a LOY, dtex 273, 34 fibrils, with the properties listed in the table below. This starting material was then cold-drawn at a take-off speed of 390 m / mm (take-off godet of the draw zone) by 11%, without draw pin, and wound up with a titer of 243 dtex.
  • the detailed yarn properties are shown in Table 2 mentioned.
  • Example 8 (supplement to Example 7):
  • Example 6 The 25% relaxation variant described in Example 6 was additionally fixed in a third process step in a contact heater of 25 cm in length at 21 ° C. without delay.
  • the thread titer resulting from this treatment is 343 dtex.
  • the detailed yarn properties are shown in Table 3. Examples of the production of weft yarns for tire cord fabrics

Landscapes

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

Abstract

Fil de trame obtenu à partir d'un multifilament polyamide 6.6 thermoprotégé pour tissu pour câble pour pneu, d'un titre total 100-400 dtex présentant, en tant que fil brut, les caractéristiques ci-après: SLASE à un allongement de 80 %: 6 cN/tex à 12 cN/tex; allongement à contrainte maximale de tension: 150 % à 300 %; résistance > 14 cN/tex; limite de réversibilité à 160 °C: 0,15 cN/tex à 0,8 cN/tex; retrait libre à 160 °C > 1 %. L'invention concerne également un procédé de fabrication d'un fil de trame multifilament de polyamide 6.6 thermoprotégé pour tissu pour câble pour pneu, selon lequel des filaments de polyamide LOY sont étirés entre 10 et 200 % et enchevêtrés à au moins 10 noeuds/m au moyen d'un gaz comprimé.
EP98914768A 1997-05-06 1998-04-28 Fil de trame et procede de fabrication d'un fil de trame a partir d'un polyamide 6.6 thermoprotege pour tissu pour cable pour pneu Expired - Lifetime EP0980447B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH106097 1997-05-06
CH106097 1997-05-06
PCT/CH1998/000170 WO1998050612A1 (fr) 1997-05-06 1998-04-28 Fil de trame et procede de fabrication d'un fil de trame a partir d'un polyamide 6.6 thermoprotege pour tissu pour cable pour pneu

Publications (2)

Publication Number Publication Date
EP0980447A1 true EP0980447A1 (fr) 2000-02-23
EP0980447B1 EP0980447B1 (fr) 2002-03-27

Family

ID=4201518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98914768A Expired - Lifetime EP0980447B1 (fr) 1997-05-06 1998-04-28 Fil de trame et procede de fabrication d'un fil de trame a partir d'un polyamide 6.6 thermoprotege pour tissu pour cable pour pneu

Country Status (15)

Country Link
US (1) US6156426A (fr)
EP (1) EP0980447B1 (fr)
JP (1) JP3459266B2 (fr)
CN (1) CN1091178C (fr)
AR (1) AR012654A1 (fr)
AT (1) ATE215137T1 (fr)
BR (1) BR9809597A (fr)
CZ (1) CZ297623B6 (fr)
DE (1) DE59803519D1 (fr)
EA (1) EA001120B1 (fr)
ES (1) ES2175700T3 (fr)
ID (1) ID22691A (fr)
TR (1) TR199902697T2 (fr)
TW (1) TW393533B (fr)
WO (1) WO1998050612A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302323B6 (cs) * 2002-01-29 2011-03-09 Performance Fibers, Inc. Rozmerove stabilní multifilamentní nit se zvýšenou odolností, zpusob její prípravy a výrobek z ní vyrobený
US20090107609A1 (en) * 2007-10-31 2009-04-30 Walter Kevin Westgate High Extensible Cut-Resistant Barrier
KR101203350B1 (ko) * 2008-04-29 2012-11-20 코오롱인더스트리 주식회사 아라미드 타이어 코드 및 그 제조방법
US10364515B2 (en) * 2016-06-09 2019-07-30 Kordsa Teknik Tekstil Anonim Sirketi High modulus nylon 6.6 cords
CN106119998A (zh) * 2016-08-26 2016-11-16 山东合信科技股份有限公司 一种pa66未拉伸丝的纺丝工艺
RU2731702C1 (ru) * 2020-02-27 2020-09-08 Общество с ограниченной ответственностью "Холдинговая компания "ЛОйлНефтехим" Полиамидная кордная ткань для каркаса многослойных шин
CN112647310B (zh) * 2020-11-24 2022-09-27 江苏太极实业新材料有限公司 高残余干热收缩力的聚酰胺56浸胶帘子布的制造方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4416935A (en) * 1981-12-11 1983-11-22 E. I. Du Pont De Nemours & Co. Bulked extensible weft yarn suitable for use as tire cords
JPS63165513A (ja) * 1986-12-25 1988-07-08 Toray Ind Inc ポリアミド繊維の直接紡糸延伸方法
JP3281112B2 (ja) * 1993-05-24 2002-05-13 旭化成株式会社 ポリアミド繊維の製造法
IT1274759B (it) * 1994-09-06 1997-07-24 Vito Ballarati Metodo per ottenere un filato multibave stirato durante la fase di interlacciatura a partire da filati termoplatici parzialmente orientati
DE59603535D1 (de) * 1995-01-25 1999-12-09 Rhodia Filtec Ag Emmenbruecke Verfahren zur herstellung eines schussgarns aus polyester für reifenkordgewebe
EP0738793B1 (fr) * 1995-04-22 1999-05-12 Akzo Nobel N.V. Fil constitué de filaments synthétiques entrelacés pour la production de tissus techniques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9850612A1 *

Also Published As

Publication number Publication date
CN1091178C (zh) 2002-09-18
TR199902697T2 (xx) 2000-07-21
DE59803519D1 (de) 2002-05-02
US6156426A (en) 2000-12-05
ID22691A (id) 1999-12-09
JP2001507411A (ja) 2001-06-05
ES2175700T3 (es) 2002-11-16
ATE215137T1 (de) 2002-04-15
EA199901003A1 (ru) 2000-06-26
TW393533B (en) 2000-06-11
CZ392199A3 (cs) 2000-03-15
AR012654A1 (es) 2000-11-08
EA001120B1 (ru) 2000-10-30
WO1998050612A1 (fr) 1998-11-12
CN1255171A (zh) 2000-05-31
BR9809597A (pt) 2000-07-04
EP0980447B1 (fr) 2002-03-27
JP3459266B2 (ja) 2003-10-20
CZ297623B6 (cs) 2007-02-14

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