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 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 a PA 66 weft for To provide tire cord fabric, which is a high thermal stability, a defined reversibility limit, sufficient strength and sliding resistance as well as a high maximum tensile strength having.
• Another task is to develop a method for To provide weft yarns for tire cords which, after impregnation, have a maximum tensile strength stretch point out the spreading of the cords in tire manufacture without weft breaks guaranteed.
• Such a yarn has the advantage that it pronounced flow behavior in the fabric, when building a Tires, a homogeneous warp thread distribution enables.
• this yarn has succeeded in making a To provide single component weft yarn that no annoying and dangerous when weaving Dust generation, like that when using natural fibers is common causes. It is also said to be high Can hardly withstand thermal stress during impregnation have a width increase and when building a Tires a very homogeneous cord warp spread enable and so universal for tire cord fabric based on nylon, polyester and aramid become.
• a load of 6 cN / tex to 12 cN / tex, preferably 6-10 cN / tex proven to be useful.
• Elongation forces higher than 12 cN / tex have the disadvantage of one inhomogeneous warp thread distribution when expanding the Radial tire on the tire building machine.
• Tensile forces under 6 cN / tex lead both with large and with selective loads, for example when storing the Fabric bales, for irreversible weft stretching and thereby insufficient stability with respect Kettfadenparalleltician. This results in bad to unusable tire carcasses.
• a maximum tensile elongation of ⁇ 300%, preferably 180-280 % has proven to be useful. Ultimate tensile strain of more than 300% lead in manufacturing from tire cord fabrics under normal loads to one too high stretch; a maximum tensile elongation of however, less than 150% leads to an insufficient Elongation reserve, resulting in insufficient Weft deformation or even weft breakage in the Tissue. In both cases, the resulting ones Tire carcasses are inhomogeneous and therefore also those from them manufactured tires.
• weft have a firmness 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 smaller than 5 cN / tex leads to dimensional stability in the weft insertion and the fabric width stability up to cannot be guaranteed for processing in the tire.
• With a reversibility limit greater than 10 cN / tex is sufficient 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 that Advantage that the fabric width when impregnating the Fabric practically does not jump in and therefore here too a homogeneous cord chain distribution, especially with Fabrics with weft yarn inlay edges, is guaranteed; with a thermal shrinking force greater than 0.8 cN / tex results, despite the impregnation with Holding rollers acting on the weft threads, a thread shortening, making the required Homogeneity is not ensured. This leads to, especially undesirable on the fabric edges Kettfadenverdichtitch. With thermal shrinkage forces of less than 0.15 cN / tex can be used for thermal Stress (impregnation) of the carcass fabric already a thread elongation occur, whereby the Parallelism of the warp threads is no longer guaranteed.
• the weft yarn also has one after impregnation SLASE 80%, 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 when building a tire Distribution of the warp threads when expanding the carcass to the final tire circumference.
• the impregnated yarn is RFL dipped in a known manner and then heat-set at Temperatures up to 245 ° C, preferably at 210-235 ° C and during 45-200 s.
• the reversibility limit is also after the hot air treatment less than 10 cN / tex, preferably less than 8 cN / tex. This has the advantage that the Vulcanizing spreading forces that suffice To deform weft threads so that an even Distribution of the carcass threads is ensured.
• the process used is a polyamide 6.6 LOY.
• a pure polyamide 6.6 can also be used with a copolyamide at least 85% by weight can be used.
• copolyamide PA 6, PA 6.10 and aramid, for example, are suitable.
• the PA-6.6-LOY is usually at spinning take-off speeds stretched at less than 1800 m / min Service.
• the starting yarn is with a copper additive at least 30 ppm Cu, preferably with 60-80 ppm Cu thermally protected.
• Has proven particularly suitable for the single-stage Manufacturing starting from a LOY, a process proven to be heat protected with at least 30 ppm Cu Polyamide 6.6-LOY filaments between 10 and 200%, preferably between 40 and 150%, in particular between 40 and 125 are stretched, then by means of a Compressed gas to at least 10 knots / m, preferred at least 15 knots / m.
• the procedure has the advantage that a compact fibril composite with relatively rough and non-slip surface results.
• the drawing of the LOY yarn can be cold or warm, with or without a stylus.
• the polyamide LOY filaments in a first step between 10 and stretched 200% and then in a second Method step using a compressed gas to at least 10 knots / m simultaneously or subsequently swirled, at a temperature between 150 and 235 ° C, preferably 200 and 225 ° C between 0-30% relaxed. That has the Advantage that lower shrinkage values and lower Reference forces (LASE) result.
• the Weft yarn additionally at a temperature between 150 and 235 ° C, in particular between 180 and 225 ° C by 0 to 10% fixed or stretched. That has the advantage, that achieved a further reduction in shrinkage values and thus shrink properties the respective Process conditions in tire construction are adjusted can.
• the weft yarn is used as raw yarn and is especially suitable for tire cord fabrics.
• Free thermal shrink (residual or permanent) Remaining change in length in% after a hot air treatment at 160 ° C that is free of thread tension for 15 minutes and then cooling and conditioning in a standard climate for 15 minutes.
• a polyamide 6.6 with a Cu content of 60 ppm was in a known manner to a LOY, dtex 519, 34 Fibrils, with those listed in the table below Properties spun.
• This source material was then at a take-off speed of 450 m / min (take-off godet in the stretching zone) by 125%, with Drawing pen, cold drawn and with a titer of 224 dtex wound.
• the detailed yarn properties can be seen from Table 1 mentioned.
• a polyamide 6.6 with a Cu content of 30 ppm was in a known manner to a LOY, dtex 550, 17 Fibrils, with those listed in the table below Properties spun. This source 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 290 dtex wound. The detailed yarn properties can be seen from Table 1 mentioned.
• a polyamide 6.6 with a Cu content of 60 ppm was in a known manner to a LOY, dtex 252, 34 Fibrils, with those listed in the table below Properties spun.
• This source material was then at a take-off speed of 120 m / min (take-off godet in the stretching zone) by 40%, with Drawing pen, cold drawn and with a titer of 190 dtex wound.
• the detailed yarn properties can be seen from Table 1 mentioned.
• a polyamide 6.6 with a Cu content of 60 ppm was in a known manner to a LOY, dtex 252, 34 Fibrils, with those listed in the table below Properties spun (analogous to Example 3).
• This Starting material was at a take-off speed from 143 m / min (take-off godet in the stretching zone) by 50%, with stylus, cold stretched.
• In another continuous process stage was carried out by means of Contact heater of 25 cm in length, at a temperature of 220 ° C, a 25% relaxation. The one after these Treatments resulting thread titer is 215 dtex.
• the detailed yarn properties are from the mentioned Table 2 can be seen.
• a polyamide 6.6 with a Cu content of 60 ppm was in a known manner to a LOY, dtex 273, 34 Fibrils, with those listed in the table below Properties spun. This source material was then at a withdrawal speed of 390 m / min (deduction godet in the stretching zone) by 11%, without Drawing pen, cold drawn and with a titer of 243 dtex wound. The detailed yarn properties can be seen from Table 2 mentioned.
• 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 (analogously to Example 3).
• This starting material (LOY) was then cold-drawn in a first stage at a take-off speed of 135 m / min (take-off godet in the draw zone) by a draw pin.
• LOY LOY
• a convection heater of 65 cm in length, at a temperature of 220 ° C was used to relax 25%.
• the material was post-fixed on a contact heater of 25 cm in length at 210 ° C without delay.
• the thread titer resulting from these treatments is 214 dtex.
• Table 2 The detailed yarn properties are shown in Table 2 mentioned.
• a polyamide 6.6 with a Cu content of 60 ppm was spun in a known manner to a LOY, dtex 519, 34 fibrils, with the properties listed in the following table (analogously to Example 1).
• This starting material (LOY) was then cold-drawn in a first stage at a take-off speed of 80 m / min (take-off godet in the drawing zone) by a drawing pin.
• three variants with 5%, 15% and 25% relaxation were produced using a convection heater of 65 cm in length and at a temperature of 225 ° C.
• the thread titers resulting from these treatments are between 283 and 349 dtex.
• the detailed yarn properties are shown in Table 3 mentioned.
• Example 8 (supplement to Example 7):
• 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 210 ° C. without delay.
• the thread titer resulting from this treatment is 343 dtex.
• the detailed yarn properties are shown in Table 3.

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• 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)

Applications Claiming Priority (3)

Publications (2)

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• 1998
  • 1998-04-21 TW TW087106068A patent/TW393533B/zh not_active IP Right Cessation
  • 1998-04-28 TR TR1999/02697T patent/TR199902697T2/xx unknown
  • 1998-04-28 JP JP54758898A patent/JP3459266B2/ja not_active Expired - Fee Related
  • 1998-04-28 DE DE59803519T patent/DE59803519D1/de not_active Expired - Lifetime
  • 1998-04-28 ES ES98914768T patent/ES2175700T3/es not_active Expired - Lifetime
  • 1998-04-28 EP EP98914768A patent/EP0980447B1/de not_active Expired - Lifetime
  • 1998-04-28 CZ CZ0392199A patent/CZ297623B6/cs not_active IP Right Cessation
  • 1998-04-28 CN CN98804861A patent/CN1091178C/zh not_active Expired - Fee Related
  • 1998-04-28 ID IDW991329A patent/ID22691A/id unknown
  • 1998-04-28 EA EA199901003A patent/EA001120B1/ru not_active IP Right Cessation
  • 1998-04-28 WO PCT/CH1998/000170 patent/WO1998050612A1/de active IP Right Grant
  • 1998-04-28 AT AT98914768T patent/ATE215137T1/de active
  • 1998-04-28 US US09/403,906 patent/US6156426A/en not_active Expired - Lifetime
  • 1998-04-28 BR BR9809597-8A patent/BR9809597A/pt not_active IP Right Cessation
  • 1998-05-04 AR ARP980102072A patent/AR012654A1/es active IP Right Grant

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